TW548250B - Optical fiber manufacture method, preform manufacture method, and preform manufacture apparatus - Google Patents

Abstract

A method for manufacturing an optical fiber comprises setting a heating condition for heating a glass rod, which is a parent material of the optical fiber, and an elongating speed of the glass rod based on a prescribed numerical value which changes with a progress of elongation of the glass rod; heating and elongating the glass rod to generate a preform based on the heating condition and the elongating speed which are set by the setting; and drawing the preform to a filament-like from by further heating the preform to generate the optical fiber.

Description

548250 Λ / __SS4 ^ nifHzl Hnr / QQR ___ B7 V. Description of the invention (丨) The present invention relates to a method for manufacturing an optical fiber, a method for manufacturing a preform, and a device for manufacturing a preform, which can be manufactured with a diameter Small changes in preforms and optical fibers. FIG. 1 is a schematic diagram of a conventional glass base material first elongating device 400. The glass base material 102 is a fiber-based material, and is usually extended by the glass base material first extension device 400. This forces the diameter of the glass base material 102 to produce a ^ 13 ^ rod 106. The glass thousand 106 has a diameter from 3mm to 5mm, which is larger than most conventional diameters for pulling out optical fibers. Most conventional diameters used to pull out optical fibers are 30mm to 80mm. The glass base material first extension device 400 includes a heating furnace tube 100 for heating the glass base material 102, and a drawing chuck 104 for supporting and extending the heating glass base material 102. In order to extend the glass base material 102, the first glass base material extension device 400 supplies the glass base material 102 to the heating furnace tube 100. Here, the base glass material 102 is heated to approximately 2000 degrees Celsius. The first extension device 400 then supports the glass base material 102 through the pull-out clip 104 and continuously pulls down the glass base material 102 from the heating furnace tube 100 to form a glass rod 106. FIG. 2 is a structural diagram of a conventional glass lathe 110. The glass rod 106 manufactured by the first extension device 400 of glass basic material will be extended twice through the glass lathe 110 to produce a preform 107. At the same time, the diameter of the glass rod 106 is reduced to a prescribed diameter. The glass lathe 110 includes clips 118 and 119 for supporting the glass rod 106, a rear support platform 116 for moving the clip Π9, and a heating source 122 for heating the glass rod 106. One side of the card holder 118 is fixed, and the other side of the card holder 8 is movable. One tractive force can be 4 This paper size is applicable to China National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling this page) φ Order --------- Line ·- Printed by the Consumers 'Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 548250 A / _Hoc / OOR B7 Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention) Used for card holder 119. The glass rod 106 supported by the clips II8 and 119 is heated by the heating source 122. The glass stem 106 can be extended by pulling the glass rod 106 through the moving tail support platform ι16. Therefore, the diameter of the 'glass rod 106 is reduced to a predetermined diameter. Although the glass base material 102 is extended using the conventional glass base material% ^^ extension device 400, it is possible to manufacture a curved glass rod 106. In addition, when a conventional glass lathe 110 is used to extend the glass rod 106 to make the preform 107, additional problems usually occur. These problems include variations in the diameter of the preforms 107 due to the difference in the amount of gas supplied to the heating source 122 and the speed of moving the tail support table 116 in the production of each preform 107. When the curved glass rod 106 manufactured by the first glass base material first extension device 400 is extended, and the preform 107 is manufactured through the glass lathe 110, the diameter of the preform 107 changes. When an optical fiber is manufactured by pulling out a preform 107 having a varying diameter, the diameter of the produced optical fiber also changes. This makes it difficult to manufacture high-quality optical fibers. Therefore, an object of the present invention is to provide a method for manufacturing an optical fiber, a method for manufacturing a preform, and a device for manufacturing a preform, which can solve the above problems. The object of the present invention can be achieved by combining the features described in the independent items of the patent application scope of the present invention. This application-scope independent term defines additional advantages of embodiments of the invention. According to a first aspect of the present invention, a method for manufacturing an optical fiber is provided, which includes setting a heating condition to heat a glass rod, which is the parent material of the optical fiber, and according to a predetermined number that changes as the glass rod is extended , Set the extension speed of the glass rod; the heating set according to this setting (please read the precautions on the back before filling this page) ♦ # --- I I--Order · --------. U

This paper size is in accordance with Chinese National Standards (CNSM4 specifications⑵ο X 297. Meal printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs printed gj < j / | f; pifH4rlor./00R _______ 5. Description of the invention) Condition and extension speed, heating And extending the glass rod to produce a preform; and drawing the preform into a thin line-like shape through additional heating of the preform to produce an optical fiber. A method for manufacturing an optical fiber is provided. The setting situation is determined based on the duration of the extension process, and the heating condition and the extension speed are set. This heating process and extension process may include a tail end drawing process to reduce the diameter of one end of the glass rod, and the tail end drawing process is based on the duration of the tail end drawing process. Pull out the end of the glass rod. A method for manufacturing an optical fiber is provided, the setting of which is based on the duration of the extension process, the position of the burner used to heat the glass rod, and the amount of gas supplied to the burner are set as heating conditions. This setting can be set as the extension speed based on the duration of the extension process. A method for manufacturing an optical fiber is provided. The setting situation is based on the length of the glass rod during the extension process, and the heating condition and the extension speed are set. A method for manufacturing an optical fiber is provided. The heating process and the extension process include a tail-end drawing process to reduce the diameter of one end of the glass rod, and the tail-end drawing process is based on the length of the glass rod. Pull out the end of the glass rod. This setting can be based on the extended length of the glass rod, setting the moving distance of the burner used to heat the glass rod and the amount of gas supplied to the burner as heating conditions. This setting can be based on the extension length of the glass rod, and set the moving speed of the clip used to support the glass rod as the extension speed. 6 The size of this paper applies to Chinese National Standard One (CNS) A4 ^ γ21〇χ 297 mm)----- I--ordered ------- J (Please read the notes on the back before filling in this Page)

5 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 548250

r-gj ^ pifH4 dnr / OO R Description of the invention) Provide a method for manufacturing optical fiber. This setting uses ~ encoder, which is provided on the motor used to drive the clip. The moving distance out of the card holder. A method for manufacturing optical fiber is provided, and the setting situation is based on the tension generated on the glass rod during the extension process as a number to set the heating condition and the extension speed. A method for manufacturing an optical fiber is provided for heating a heating source of a glass rod. As the elongation process proceeds, the longitudinal movement of the glass rod is controlled, and the elongation process is controlled during the heating and elongation process so that the tension before the heating source moves a predetermined distance is substantially Up becomes 110 ° /. Or less The average tension of the tension after the heating source has moved a specified distance. A method for manufacturing an optical fiber is provided, in which the tension is controlled during heating and elongation, so that the tension before the heating source moves a predetermined distance generally becomes an average tension from 80% to 110% after the heating source moves a predetermined distance. This prescribed distance is generally between 50 mm and 150 mm. When the heating source moves this specified distance, the heating and extension process can control the extension speed to a certain speed. This setting depends on the tension, and the speed of the clamp used to support the glass rod is set as the extension speed. A method for manufacturing an optical fiber is provided. The setting situation is based on the position of the marker provided on the connection between the glass rod and any virtual rod as a number, which is connected to either end of the glass rod to set the heating condition and Increase speed. A method for manufacturing an optical fiber is provided. The heating process and the extension process include a tail-end drawing process to reduce the diameter of one end of the glass rod, and the tail-end drawing process is based on the marked position. 7 This paper size applies to China National Standard (CNS) A4 (210 X 297 public love) (Please read the precautions on the back before filling this page)

Λ7 548250 ____ ^ ^ ά ^ ριΐήΛ Hnr / QQR ___ ίϋ -------- 5. Description of the invention (Q) The end of the glass rod. This setting can be based on the position of the cut provided on the connection between the glass rod and any virtual rod as the mark position 'to set the heating condition and the extension speed. A method for manufacturing optical fiber is provided, and the setting situation is based on the position of the fluorescent paint provided on the connection between the glass rod and any virtual rod as a mark position, and the heating condition and the extension speed are set. Provide a method of manufacturing optical fiber 'this setting situation is based on the diameter in a plurality of locations along the axis of the glass rod as a number of' set the extension speed in a plurality of locations along the axis of the glass rod 'and based on glass The average of the diameters of the plurality of positions of the pole is used to set the heating condition. A method for manufacturing an optical fiber is provided. The diameter of one end of a glass rod pulled out by the tail end is reduced, and the setting situation is based on the diameter of a plurality of positions along the axis of the glass rod 'and along the extension process. The length change of the glass rod in the axis direction of the glass rod is used as the number of "detection of the position of the tail end of the glass rod pulled out by the tail end" and the position of the tail end of the drawn area through flame honing. The honing range of the glass rod and the honing range of the glass rod are set according to the diameter of the region pulled out at the tail end, setting the heating power condition of the flame, and the flame during the heating and extending process through the heating power condition. According to another aspect of the present invention, a method for manufacturing an optical fiber is provided. The method includes heating and extending a glass rod, which is the parent material of the optical fiber, to produce a preform. The preform is additionally heated to pull the preform into a similar thin line shape. To generate an optical fiber; and the heating and extending process includes pre-heating the glass rod until the specified area of the glass rod is softened, and the end is pulled out of the specified area to reduce the diameter of the specified area and to additionally heat the paper Standards apply to China National Standard (CNS) A4 specifications (210 X 297 public love) (Please read the precautions on the back before filling this page) Order --------- line

Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs

Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 548250 V. Description of the invention (6) and extension of the prescribed area, making one end of the glass rod. A method for manufacturing optical fiber is provided. The tail-end drawing process further includes a second heating process 'for heating an area through a flame, compared with the center of a prescribed area', which mostly faces the middle surface of a glass rod, and the flame concentration is less than The flame concentration of the preheating process. According to a first aspect of the present invention, a method for manufacturing a preform, which is a mother material of an optical fiber, includes setting a heating condition for heating glass, which is a mother material of an optical fiber, and is changed according to the extension of the glass rod. Predetermined number, set the extension speed of the glass rod, and the heating condition and extension speed set according to the given situation, heat and extend the glass rod to produce a preform. A method for manufacturing a prefabricated part is provided. The setting situation is based on the duration of the extension process as a number, and the heating condition and the extension speed are set. A method for manufacturing a preform is provided. The heating process and the extension process include a tail end drawing process to reduce the diameter of one end of the glass rod, and the tail end drawing process is based on the duration of the tail end drawing process. With the end of the extension process, pull out the end of the glass rod. This setting is based on the extension length of the glass rod in the extension display as the number, setting the heating condition and the extension speed. The heating process and extension process further include a tail end drawing process to reduce the diameter of one end of the glass rod, and the tail end drawing process is based on the extension length of the glass rod. With the heating and extension process, the tail end pulls out the glass rod. The end. A method for manufacturing a prefabricated part is provided, and the setting situation is based on the tension generated on the glass rod during the extension process as a number, and the heating condition and the extension speed are set. (Please read the precautions on the back before filling this page) I ------ Order --------- Line ^, · Used in accordance with National Standard (CNS) A4 specifications ) Λ 548250

Wpi frU Hr > r / rmR__B7 _____ V. Description of the Invention (^) Provide a method for manufacturing a preform for heating the heating source of the glass rod, and as the extension process proceeds, move along the longitudinal direction of the glass rod 'and the heating and extension process The extension speed is controlled so that the tension before the heating source moves a predetermined distance generally becomes 110% or less, and the average tension of the tension after the heating source moves a predetermined distance. A method for manufacturing a preform is provided, in which the tension is controlled during heating and elongation, so that the tension before the heating source moves a predetermined distance generally becomes an average tension from 80% to 110% after the heating source moves a predetermined distance. This prescribed distance is generally between 50 mm and 150 mm. When the heating source moves a specified distance, the heating and extension process controls the extension speed to a certain speed. Provide a method for manufacturing prefabricated parts. The setting situation is based on the position of the mark provided on the connection between the glass rod and any virtual rod, which is connected to either end of the glass rod to set the heating condition. With extended speed. The heating process and extension process may include a tail-end drawing process to reduce the diameter of one end of the glass rod, and the tail-end drawing process according to the marked position, with the heating and extending process, the tail end is pulled out of the glass rod. A method for manufacturing a prefabricated part is provided. The setting situation is based on the diameter in a plurality of positions along the axis of the glass rod as a number, the extension speed in the plurality of positions along the axis of the glass rod is set, and the basis is set. The average diameter of the diameters of the plurality of positions of the glass rod is used to set the heating condition. To provide a method for manufacturing a preform, the diameter of one end of a glass rod pulled out by the tail end is reduced, and the setting situation is based on the diameter of a plurality of positions along the axis of the glass rod 'and along the extension process. The length change of the glass rod in the direction of the glass rod's axis is counted as a number, and the position of the tail end of the glass rod pulled out by the tail end is detected, and it is pulled out according to the tail end (please read the precautions on the back first) (Fill in this page again.) · · Ϋ 1_1 ϋ · an 丨 Order --------- Line 'Printed by the Intellectual Property Bureau Staff Consumer Cooperatives of the Ministry of Economic Affairs This paper applies Chinese national standards (CNSW specifications (210 X 297 (Mm): / 008548250 A7 B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. The description of the invention (3) The location of the area, set the honing range of the glass rod through flame honing, and draw the area according to the tail end. Diameter, setting the heating power state of the flame 'and the honing range of the honing glass rod through the flame of the heating power state during the heating and extension process. According to another aspect of the present invention, a method for manufacturing a preform is proposed. Method, which is the mother material of the optical fiber, including pre-heating the glass rod until the specified area of the glass rod is softened, and the end is pulled out of the specified area 'to reduce the diameter of the specified area, and to use additional heating and extend the specified area ， Make one end of the glass rod. This tail end pull-out process also includes a second heating process to heat an area through the flame. Compared with the center of the specified area, it mostly faces the middle surface of the glass rod, and the flame concentration Less than the flame concentration of the pre-heating process. According to a first aspect of the present invention, a device for manufacturing a preform, which is a matrix material of an optical fiber, includes a heating source for heating a glass rod, which is a matrix material of the preform. An extension unit for extending the glass rod; a measuring device for measuring the number that changes as the glass rod is extended; and a control unit for measuring the number based on the number measured by the measuring device値, control the heating condition of the heating source and the extension speed of the extension unit. Provide a device for manufacturing prefabricated parts, and the measuring device measures the extension process The running time is counted, and the control unit controls the heating condition and the extension speed according to the progress time of the extension process measured by the measuring device. A device for manufacturing a prefabricated part is provided. The moving distance of the changed extension unit is counted, and the control unit controls the heating condition and extension speed based on the movement distance of the extension unit re-measured by the lotus: measuring device. II This paper standard "applies to Chinese national standards ( CNsi specifications (210 X 29 ^^ ------- (Please read the precautions on the back before filling in this page) 0 n ϋ n 1 nnn) ^ · n ϋ n ϋ ϋ ϋ ϋ 线 # Ministry of Economic Affairs Intellectual Property Printed by Bureau Consumers Cooperative

548250

A device for manufacturing a prefabricated part, a measuring device measures the tension generated on a glass rod extended by a glass rod as a number, and the control unit controls the heating based on the tension generated on the glass rod measured by the inner garment. Condition and extension speed. A device for manufacturing a prefabricated part is provided. The heating source moves along the longitudinal direction of the glass rod along with the extension process, and the control unit controls the extension speed so that the tension before the heating source moves a predetermined distance generally becomes n 0% or lower. The average tension of the tension after the heating source has moved a predetermined distance. A device for manufacturing a preform is provided, and a control unit controls the tension so that the tension becomes substantially from 80% to 110 ° / before the heating source moves a predetermined distance. The average tension of the tension after the heating source has moved a predetermined distance. This prescribed distance is generally between 50mm and 150mm. When the heating source moves a predetermined distance, the control unit can control the extension speed to a certain speed. Provided is a device for manufacturing a prefabricated part. A measuring device measures a marked position provided on a connection between a glass rod and any virtual rod as a number, which is connected to either end of the glass rod, and controls The unit controls the heating condition and the extension speed according to the marked position measured by the measuring device. Provided is a device for manufacturing a preform, a measuring device measures a diameter in a plurality of positions along an axis direction of a glass rod as a number, and controls a dollar based on a number of positions in a plurality of positions along an axis direction of the glass rod. Diameter, control # the extension speed in a plurality of positions along the axis of the glass rod, and # control the heating condition based on the average diameter of the diameters in the plurality of positions. In order to make the above and other objects, features, and advantages of the present invention obvious and easy to understand, the following describes in detail the preferred embodiments, and the accompanying drawings, as follows: The paper dimensions are applicable to the Chinese National Standard (CNS ) A4 size (210 x 297 mm) (Please read the precautions on the back before filling out this page)-· ϋ n · ϋ II in i ^ i one 0, ϋ 1.1 ϋ I ϋ I · 548250 A7 B7 Η nr / (00 8. V. Description of the invention) Brief description of the drawings: Figure 1 shows a schematic diagram of a traditional glass base material first extension device 400; Figure 2 shows a traditional glass lathe 110 architecture diagram; Figure 3 shows the system diagram of the optical fiber manufacturing device of the present invention; Figure 4 shows the flowchart of the optical fiber manufacturing method of the present invention; Figure 5 shows the first extension device of glass base material 900 architecture diagram; Figure 6 shows the architecture diagram of the first extension device 402, which supports a standard rod 138 via a base material fixing unit 136 to adjust the axis of the glass base material 102 ; Figure 7 shows the glass foundation of Figure 4 Detailed flow chart of the first extension process (S204); Figure 8 does not show the architecture diagram of the first extension device 402, which supports the standard bar 138 via the extension clip 142; Figure 9 shows the first extension The structural diagram of the device 402 supports the standard rod 38 via the suspension mechanism 134 and the extension mechanism H0; FIG. 10 does not show an example diagram of using the extension rollers 144a and 144b instead of the extension clip 142 on the extension mechanism 140; Figure 11 shows an example of using extension rollers 144a and 144b instead of the extension clip M2 on the extension mechanism 140. Figure 12 does not show a schematic diagram of the glass base material 102, and its curvature is measured. Figure 13 shows that the extension roller M4a is controlled by the first extension device 402! The mechanism diagram of the rotation speed of 44b; This paper size applies the Chinese National Standard (CNS) A4 Regulation 1 (210x297 public meals ^ (Please read the precautions on the back before filling this page)

-n ϋ MmtB in n- «In Yikou, I 1 an n ϋ— n_i n I Printed by A7, Consumer Cooperatives, Intellectual Property Bureau, Ministry of Economic Affairs, Five Works 548250 Description of the Invention ((1) Figure 14 The relationship between the center position of the thermally softened area of the base material 102 and the number of deviations between the extension axis 154 and the curvature of the glass rod 106; Figure 15 shows the deformation of the surface of the extension rollers 144a and 14 flutter; Fig. 16 shows the displacement diagram of the metal pipe when the metal pipe is loaded by the extension rollers 144a and 144b of the batch number 300 in Fig. 15; Fig. 17 shows the first extension device through the embodiment 402, a dislocation map of the center position of the heat-softened area; FIG. 18 shows the change of the center position of the heat-softened area when the rotation speeds of the extension rollers 144a and 144b are controlled at the same rotation speed; FIG. 19 FIG. 5 shows another embodiment of the burner 176 for the glass rod melting device 370 of FIG. 5; FIG. 20 shows the structural diagram of the glass rod conveying device 380; FIG. 21 shows Is a schematic diagram of the storage container 224 of the first extension device 402; FIG. 22 shows the movement of the glass rod conveying device 380 when the glass rod 106 is conveyed; FIG. 23 shows another embodiment of the glass rod conveying device 380; FIG. 24 shows the glass rod conveying device 380; When the conveying device 380 conveys the glass rod 106, the movement diagram of the glass rod conveying device 380 in FIG. 23 is shown in FIG. 25; FIG. 25 is a structural diagram of the second extension device m of the glass rod of the present invention; The detailed flow chart of the second extension process (S206) of the glass rod in Figure 4; c Please read the precautions on the back before filling this page) Order --------- The national standard (cns) A4 548250

5. Description of the invention) Figure 27 shows an example diagram of the cooling device 33o provided on the fixed clip n8 and the movable clip 119 of the second extension device 111 of the glass rod; Figure 28 shows an example The temperature graph of the fixed clip 118 and the movable clip 119 of the comparative example; FIG. 29 shows the relationship between the distance between the heating source I22 and the diameter measuring device 124 and the percentage change in the diameter of the glass rod 106 Fig. 30 shows the structural diagram of the second extension device m of the glass rod, which has a force measuring device 282; Fig. 31 shows the detailed flow of the extension process (S154) of Fig. 26

Figure 32 shows the process of diameter change during the extension of the glass rod 106; Figure 33 shows the process of the glass rod 106 being extended according to the extension process (S154) of Figure 31; 34 The figure shows the tension change of the glass rod 106 in the early extension stage of the example; FIG. 35 shows the tension change of the glass rod 106 in the early extension stage of the comparative example; FIG. 36 shows Shown is the change of the diameter of the glass rod 106 after the extension of the glass rod 106; Figure 37 shows a detailed flowchart of the drawing process (S158) at the end of Figure 26; Figure 38 shows Shown is a schematic diagram of the cutout 284. The position detection process (S169) at the end of Figure 37 is provided on the connection between the glass rod 106 and the virtual rod 108; (Please read the note on the back first Please fill in this page for further information) ϋ 1 · ϋ a · — 11 ϋ 1ϋ 1 OJ n ϋ · ϋ · • Line 丨 # Printed by the Ministry of Economic Affairs and Intellectual Property Bureau Staff Consumer Cooperatives This paper is printed in accordance with China National Standard (CNS) A4 specifications ( 21〇X 297) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 548 250 A7 ----------------------- B7 V. Description of the invention (D) What the brother 3 9 can't draw is the 7K intention of the mark 2 8 7 which It is used for the connection between the glass rod 106 and the virtual rod 108 as another example of the mark. What the younger 40 0 can not draw is to detect the cutout 284 in the position detection process (S169) at the tail end. Schematic diagram of the second extension device ill of the glass rod; FIG. 41 shows the movement of the heating source 122 and the tail support platform 116 during the drawing process of the tail end of the glass rod 106 in the flowchart shown in FIG. 37; FIG. 42 shows a setting example of another method of the tail-end drawing process (S158) in the tail-end drawing process of FIG. 37; FIG. 43 shows the drawing of the tail-end drawing process in FIG. 37; In the exit process (S158), another setting example of another method of the tail end pull-out process; FIG. 44 shows a structural diagram of the heating source 122 of the second extension device 111 of the glass rod; FIG. 45 shows Is a plan view of the top of the heating source 122; FIG. 46 shows the relationship between the linear velocity of oxygen and the top temperature of the heating source 122; FIG. 47 shows the shape of the tip of the preform 107 , Its diameter is reduced and melted during the tail drawing process (S158); Figure 48 shows another shape of the tip of the preform 107, and the tail bribe is extended; Figure 49 shows The damage map of the preform 107 before the surface treatment in the surface treatment process (S168) of FIG. 26 before the surface treatment; FIG. 50 shows a schematic diagram of the preform 107a, which is etched by hydrofluoric acid. FIG. 51 Treatment with the example shown in Figure 52; Figure 51 shows the number of hydrogen fluoride concaves produced on the preform 107 of the counting example and the comparison example by visual inspection; This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) ------- Order · -----— II * 5 ^ '(Please read the notes on the back before filling out this page) A' Employee Consumer Cooperatives, Intellectual Property Bureau, Ministry of Economic Affairs Printed 548250 SS46pifH4 Hor / 008 __B / ____ 5. Description of the invention ((0) Figure 52 shows the uneven surface of the preform 107 after the hydrofluoric acid etching process of the example and the comparative example; page 53 The figure shows another shape of the surface-treated preform 107; Figure 54 shows Schematic diagram of an ultrasonic cleaning device 404 for cleaning the heating source; and FIG. 55 shows a structural diagram of a preform pull-out device 500 for extending the preform 107 to manufacture optical fibers. Description of the symbols of the drawings: 100: heating furnace tube 102: glass base material 104: pull-out clip 106: glass rod 107, 107a, 107b: preform 108 '342: virtual rod U0 · glass lathe 111: glass Second pole extension device 112: pallets 114, 116: rear support wipers 118, 119, 346, · clip 120: mobile bracket: heating source 124: diameter measuring device 130: extension furnace 13 4: suspension mechanism, 136: Basic material fixing unit 138: Standard rod 14: Extension mechanism 142: Extension clips 144a, 14 ... Extension rollers 148, 149: Bearing 150: Measuring device 152: Diameter measuring device I54: Extension axis 156 · Diameter control unit 1%: Position control unit 176 · Burner 178: Flame 190: Hydrogen supply pipe 192: Oxygen supply pipe 194: Annular gas inlet 19 6. Cooling water The paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297) (please read the precautions on the back before filling this page)

548250 A7 B7 200: Cooling water discharge pipe 206: Extension device 210: Rotary table 214: Timing conveyor belt 218: Extended melting clip support element 245: Movable support element 248: Operation switch box 252: Support frame 256, 268: Rotating shaft 260: Tray 266: Connecting shaft 272: Moving bracket encoder V. Description of the invention (S) 198 Cooling water supply pipe 204: Feeder 208: Support leg 212: Motor 216: Burner rack 224: Storage Containers 234a, 234b, 236a, 236b 244: Cylinder storage box 246: Fixed support elements 250, 264: Actuator 1 254: Manipulators 257, 258: Pegs 262: Pillars 270: Sliding pushers 273: End support Rack drive encoder 274: Mobile stand motor 276: Chain 280: Control unit 284: Cutout 286: Inner tube 288: Oxygen outlet 294: Flame 298: 1 Blue air flow rate control unit 302: Connection element 306: Drive source 275: Tail end Support frame drive motor 278: Flow controller 282: Tension measuring device 285: Outer tube 287: Fluorescent paint 290: Flammable gas outlet 296: Inert gas passage 300: Valve 300: Control element 308 ... oxygen Channel ------------ Φ (Please (Please read the notes on the back and fill in this page) Order --------- Line-The scale of the scale is applicable to the Chinese National Standard (CNS) A 丨 ^ i721〇x297 Public Love 18 Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs and Consumer Cooperatives 548250 A / s S46pifd4.doc / 008 ___ B7 V. Description of the Invention (β) 310: Oxygen flow rate control unit 314: Flammable gas flow rate control unit 312: Flammable gas passage 316: Branch tool 330: Cooling device 332 : Melting section 334: Cutting surface 336: Taper section 338: Thin section 340: Handle 346: Clip 344: Movable support 348: Heating device 350: Optical fiber 352: Diameter measuring device 354: First coating device 356: first correction device 358: second coating device 36: second correction device 362: traction machine 370 glass rod melting device 380: glass rod transfer device 390: flame nozzle 392: hydrogen inlet pipe 394: oxygen inlet Tube 396: Ultrasonic oscillator 398: Rinse solution 400, 900: Glass base material First extension device 402: First extension device 404: Ultrasonic cleaning device 500: Preform pull-out device 600: Glass Base material generator 700 Glass base material dehydrating and sintering detailed description of the present invention Shu apparatus of the present invention will be explained using the embodiments described embodiment. However, the following examples do not limit the scope of the present invention as described in the patent application scope. In addition, all the features described in the embodiments or a combination thereof are not necessary for the present invention. Although the present invention has been disclosed in a preferred embodiment, the scope of the present invention is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297) (please read the precautions on the back before filling this page) 0 Order --------- Line Jtf 548250 S ^ 46pifd4doc / 0Q ^ A7 B7 V. Description of Invention (Π) (Please read the notes on the back before filling this page) It is not limited to these examples. Anyone skilled in this art can make various amendments and improvements to the embodiments of the present invention. Such amendments or improvements to the scope of patent application of the present invention are also within the protection scope of the present invention. Figure 3 shows that A system diagram of the optical fiber manufacturing device of the present invention. The system of the optical fiber manufacturing device of the present invention includes a glass base material generating device 600 'for generating a glass base material 102 as the base material of the optical fiber; a glass base material dehydrating And sintering device 700 for dehydrating and sintering the glass base material 102;-the first glass base material extension device 900 for extending the glass base material 102 to produce a glass rod 106; A glass rod transmission device 380 for transmitting the glass rod 106; a glass rod second extension device 111 for extending the glass rod 106—a second time to produce a preform 107; and a preform pulling device 500, It is used to pull out the preform 107 to generate an optical fiber. Figure 4 shows a flowchart of the optical fiber manufacturing method of the present invention. The glass-based material generating device 600 uses a VAD method, a vapor axis deposition method, or the like ( S200), producing a glass base material 102. The glass base material 102 is then dehydrated in a chlorine gas environment and sintered in an inert gas environment via the glass base material dewatering and sintering device 700 (S202). The Ministry of Intellectual Property Bureau ’s Consumer Cooperative printed glass base material 102 is usually 110mm to 200mm in diameter, compared to 30mm to 80mm in diameter, which is more practical for pulling out optical fibers. Therefore, the The glass base material 102 is first extended by the glass base material first extension device 900 to manufacture a glass rod i06 (S204). The glass rod 106 has a diameter of 3mm to 5mm, which is convenient for drawing The optical fiber is transmitted from 30mm to 80mm ° The glass rod 106 is transmitted through the glass rod transmission device 380 (S205). The glass rod 20 548250 A7 B7 V. Description of the invention ((¾) 106 will then be heated and extended by the second extension device U1 of the glass rod To a predetermined diameter to manufacture a preform 107 (S206). The preform 107 is heated and extended to a similar thin wire form through the preform pull-out device 500 to manufacture an optical fiber (S210). Figure 5 shows the structure of the first extension device 900 for the glass base material. The glass base material first extension device 900 includes a first extension device 402 for heating and extending the glass base material 102, and a glass rod melting device 370 for melting the glass rod 106. The first extension device 402 has an extension furnace 130 having a heating furnace 100, and a suspension mechanism 134 is provided above the extension furnace 130. The suspension mechanism 134 is used to supply the glass base material 102 to the inside of the extension furnace 130 at a predetermined speed. The first extension device 402 further has an extension mechanism 140 provided under the extension furnace 130 to support the glass rod 10 of the reduced diameter, and the glass rod 106 is pulled out at a prescribed speed. The suspension mechanism 134 has a base material fixing unit 136 for supporting the glass base material 102. The extension mechanism 140 has an extension clip 142 for supporting the glass rod 106. The glass rod melting device 37 has a burner 176, a rotating table 210, a certain time conveyor belt 214, a motor 212, a support leg 208, a burner holder 216, an extension device 206, and an extension melting card Clip 218. The glass base material 102 is mounted on the base material fixing unit, and is fed into the heating furnace 100 at a predetermined speed. The glass base material 10 is heated through the heating furnace 100, and then supported and pulled out through the extension clip 142 to reduce the diameter to produce a glass rod 106. The glass rod 106 is pulled out at a speed to obtain a suitable diameter via the extension device 206, so that the glass base material 102 is extended to a desired diameter. At the same time, through a diameter measuring device 152, the paper size is suitable for the family and the family. Standard ㈣ 石 ㈣ specifications (2) ^ 7pr7 (Please read the precautions on the back before filling in this page)

Order --------- line—J Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economy, A, 548250 ____g ^ 4 ^ pifd4.doc / 008_ _ β7 V. Description of the invention ((1) Measuring glass rod 106 In order to extend the glass rod 106 to the desired diameter, the feeder (feedei 0204, heating furnace 100 and extension device 206 will be controlled based on this measurement result. The glass rod 106 is extended to a specified After the diameter and length, part of it will be melted by the burner 176 'and it does not include air bubbles or the bubble without its diameter is about 0.3mm or more. The combustion of oxygen and hydrogen is a reasonable heating of the burner 176 Device. Gas combustion based on hydrocarbon fuels such as propane and oxygen can also be used in the burner 176. The burner 176 is mounted on the rotary table 210 via the support foot 208. The rotary table 210 is driven through a * drive & For example, the motor 212 rotates via a timing conveyor 214. The rotary table 210 is mounted on the burner rack 216. The glass rod melting device 370 heats the glass rod 106 through the rotary burner 176 to melt the glass rod 106, and uses a device having a specified Speed and The extension of the strength melts the clip 218 to extend the glass rod 106. Figure 6 shows the structure of the first extension device 402, which supports a standard rod 138 via a basic material fixing unit 136 to adjust the length of the glass The axis of the base material 102. The suspension mechanism 134 has a mechanism not shown in the figure for adjusting the vertical inclination of the base material fixing unit 136. The extension mechanism 140 has a mechanism and is not shown in the figure for adjustment The vertical inclination of the extension clip 142. The extension mechanism 140 has a mechanism, which is also not shown in the figure, and is used to adjust the position of the extension mechanism 140 within the horizontal phase angle of the rear and front and the left and right. Fig. 7 shows a detailed flowchart of the first extension process (S204) of the glass base material in Fig. 4. The first extension process (S204) of the glass base material has a process for adjusting the extension of the first extension device 402. Axis. First of all, a 22-paper scale applies Chinese National Standards (CNS), \ 4 ^ 格 ⑵ (} χ 297 公 餐) " --- (Please read the notes on the back before filling this page) Stupid order- -------- Line · Ministry of Economy Printed by the Consumer Property Cooperative of the Intellectual Property Bureau 548250 zl ^ ni fd4. Doc / OO 8 A7 B7 V. Description of Invention (yo) Metal or ceramic is rarely formulated as a standard bar 138. The linear bar 138 needs to be guaranteed (Guaranteed). The standard rod 138 usually has the length of a glass base material 102, and the virtual rod is attached to the glass base material 102. The linear state axis of the standard rod 138 is guaranteed along the full length. As shown in Fig. 6, the base material fixing unit 136 via the suspension mechanism 134 supports the standard rod 138 (S110). Next, adjust the tilt f A of the suspension mechanism I34 so that the direction of the standard rod 138 conforms to the vertical direction (S112) ° Subsequently, after the adjustment process is completed, the standard rod 138 is removed from the base material fixing unit (S114). As shown in FIG. 8 is a structural diagram of the first extension device 402, which supports a standard rod I38 via a long clip I42. The extension clip 142 via the extension mechanism I40 supports the par I38 (Fig. 7, S116). Next, adjust the inclination B of the extension mechanism 140 so that the direction of the par 8 is aligned with the vertical direction (Fig. 7, S118). At the same time, the extension clip I42 is maintained at the approximate center in the longitudinal direction of the par 138. The steps of adjusting the suspension mechanism and the extension mechanism 140 may be reversed. The extension mechanism 140 can be adjusted first, and then the suspension mechanism 134 °. Fig. 9 shows the architecture diagram of the first extension device 402 ', which is supported by both the suspension mechanism 134 and the extension mechanism 140. Par 138. After completing the adjustment steps of the suspension mechanism 134 and the extension mechanism 140, the standard rod I38 is supported by the basic material mouth setting unit 136, and the bottom end of the standard rod will be supported by the extension clip 142 (Figure 7, Sl20). ). Next, adjust the horizontal position C of the extension mechanism or the horizontal position C of the suspension mechanism so that the difference in horizontal direction between the vertical axis and the standard rod 138 is less than 1 mm long (Fig. 7, S122). 〇2 Then, extend the glass base material 1 23 by using the first extension device 40 (please read the precautions on the back before filling this page) 0 ------- Order ------- I , Printed by the Intellectual Property Bureau's Consumer Cooperatives, Ministry of Economic Affairs, the paper size is in accordance with Chinese National Standard (CNS) A4 (210 x 297 mm) 548250; / 1 A pi fΗ / 1 Η η r / 0 η 9 Α7 Β7 Ministry of Economic Affairs The Intellectual Property Bureau employee consumer cooperative prints V. Invention Description (7 丨) to produce a glass rod 106, whose extended axis will be adjusted (Figure 7, S124). Finally, the glass rod 106 is melted via the glass rod melting device 370 (Fig. 7, S126). 10 and 11 show exemplary diagrams of using the extension rollers 144 a and 144 b on the extension mechanism 140 instead of the extension clip 142. If the extension rollers 144a and 144b are used to adjust the vertical inclination of the axis connecting the suspension mechanism 134 and the extension mechanism 140, the following method can be adopted. The standard rod 138 is supported via the extension rollers 144a and 144b relative to the standard rod 138 via the extension clip 142 (FIG. 7, S116). Subsequently, the inclination of the extension mechanism 140 is adjusted by adjusting the horizontal inclination of the straight line F. The straight line F connects two rotation axes between the extension rollers 144a and 144b. After the step of adjusting the inclination of the extension mechanism 140 (FIG. 7, S118), the extension rollers 144 a and 144 b can vertically support the standard rod 138. Then, as shown in FIG. 11, in this step, the base material fixing unit 136 via the suspension mechanism 134 and the extension rollers 144 a and 14 of the extension mechanism 140 support the standard rod 138 corresponding to the base material fixing unit 136 and The standard pole 138 supported by the extension clip M2 (Figure 7, Sl20). Next, the vertical inclination E of the axis connecting the suspension mechanism 134 and the extension mechanism 140 is adjusted. This adjustment step can be completed by adjusting the position of the extension mechanism H0 in the horizontal direction or adjusting the position of the suspension mechanism 134 in the horizontal direction. This step corresponds to the adjustment step of the horizontal position of the suspension mechanism 134 and the extension mechanism M0 (seventh (S122). Using the above adjustment method, the vertical inclination of the axis connecting the suspension mechanism 134 and the extension mechanism 140 can be easily adjusted. This method is not only suitable for extending the straight glass base material 102 and between the virtual rod and the glass base material 102. 24 This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back first (Fill in this page again) Order --------- Line-548250 A7 ^ π π r / Π 0 R Β / Five copies of printed clothing for employees' cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs ^ Instructions) There will be no The gap is also suitable for extending the curved glass base material 102 to obtain a glass rod 106 having a reduced diameter within a desired linear state range. It is possible to provide the glass base material 102 to be connected to the virtual rod, and there is no gap between the glass base material 102 and the axis of the virtual rod. For the method of supporting the glass base material 102 via the suspension mechanism 134, the extension mechanism 140, or both, the first extension device 402 can accurately adjust the vertical tilt of the extension axis. Therefore, the bending moment which causes the bending in the heat-softened area of the glass base material 102 can be reduced. The bending caused by the width of the extended glass base material 102 is related to the extension mechanism 140. The glass base material 102 can thus be extended within a desired linear state range without creating a gap between the glass base material 102 and the axis of the virtual rod. Fig. 12 shows a schematic diagram of the glass base material 102, and its bending degree is measured. The glass base material 102 is extended through the extension device 402, and its vertical tilt is adjusted through the above-mentioned adjustment method. Next, the curvature of the glass rod 106 was measured. First, the glass rod 106 is placed on the two bearings 148 and 149 mounted horizontally so that the straight connection can be the top of the bearings 148 and 149 of a standard line. Next, the maximum or minimum height of the height is measured from the standard line using a device such as a scale measurement device along the glass rod 106 via the scanning measurement device 150. Then, the glass rod 106 is rotated 180 degrees, and the maximum and minimum of the local degree are measured from the standard line in the same way. The maximum value between the difference between the maximum value of the first measurement and the minimum value of the next measurement or the difference between the minimum value of the first measurement and the maximum value of the next measurement is set to "2h". This frame is divided into "h" by the length L1, which is the distance between the two bearings 148 and 149, and represents the linear state of the glass rod 106 per unit length. (Please read the precautions on the back before filling this page) 0 ϋ- Hal n mmmmme n * ϋ m sip, · ϋ ϋ · n ϋ &·; m-line-This paper size applies to China National Standard (CNS) A4 specification (210 X 297 public love) Λ7 548250 S S46pifd4.doc / 0Q8_ B7_ V. Description of the invention) The five-segment straight glass base material 102 with virtual rods and seamless gaps will be extended by the first extension device 402 on an adjusted extension axis to 5 segments of glass rod 10 were produced. The linear state of each glass rod 106 is measured by the method shown in FIG. The "h" of the glass rod 106 are all within 0.5 mm. Then, the glass rod 106 is extended by the first extension device 402 without adjusting the extension axis. On average, 90% of the glass rods 106 are curved, meaning that the glass rods 106 need to be corrected by adjusting the extension axis. FIG. 13 shows a mechanism diagram for controlling the rotation speed of the extension rollers 144a and 144b via the first extension device 402. The first extension device 402 controls the rotation speed of each extension roller 144a and 144b, respectively. The glass base material 102 is suspended through the base material fixing unit 136 of the first extension device 402, and is sent to a heating furnace (not shown) at a predetermined speed. The glass rod 106 is heated and softened by the heating furnace, and is grasped by a pair of extension rollers 144a and 144b. By measuring the diameter of the heat-softened area of the glass base material 102 using the diameter measuring device 152, the center position of the heat-softened area of the glass base material 102 can be obtained. At the same time, the center position of this measured diameter can be calculated. A laser beam transmission type diameter measuring device is used as the diameter measuring device 152. This laser beam passes through a window provided on the lower part of the heater in the heating furnace, and is irradiated on the heat-softened area of the glass base material 102. This measured diameter is input to the diameter control unit 156 to calculate the difference 値 between the target diameter 値 and the measured diameter. The rotation speed of the extension roller 144a is controlled based on the calculated difference in diameter. Then, the information at the center position of the heat-softened area is input to the position control unit 158. The position control unit 158 calculates the central position between the heat-softened area and the 26th paper size. The Chinese national standard (cns) a4 specification is applied. 〇1〇an «1 · ——— ϋ ϋ n ϋ · mamm§ tmt Βϋ I ϋ I 0 eM§ an «1« emam mmm9 mmmmmw mmmMmm y § ammi ϋ I 11 11 mmt§ mmmmmm I (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economy 297 mm) A7 548250 ___Szl6pifd4 dor / OO 8_R / ___—., 5. Description of the invention (water) The deviation between the extension axes 154 of the extension device 402. The position control unit 158 further calculates the correction of the rotation speed, which can reduce the number of deviations between the center position of the thermally softened region and the extension axis 154 to the actual zero point. Next, the position control unit 15S controls the rotation speed of the extension roller 144b based on the increased correction value 値 and the rotation speed of the extension roller 144a. Figure 14 is a diagram showing the relationship between the number of deviations between the center position of the heat-softened area of the glass base material 102 and the extension axis 154 and the curvature caused by the glass rod 106. The number of deviations between the center position of the heat-softened region of the glass base material 102 and the extension axis 154 is large, and the result bent in the glass rod 106 is large. When the number of deviations is large, the thermoelectric resistance elements on the surfaces of the extension rollers 144a and 144b are deformed. The shape of the extension roller 14 and M4b may be slightly different from each other. As a result, the rotation speeds of the surfaces of the extension rollers 144a and 144b are different from each other. If the deformation of the surfaces of the extension rollers 144a and 144b is one of the causes of the bending of the glass rod 106, the bending of the glass rod 106 can be reduced by controlling the rotation speed of each extension roller 144a and 144b separately. The surfaces of the extension rollers 144a and 144b are formed of a thermal resistance material such as non-asbestos or asbestos. These materials are thermally resistive and flexible 'so that the extension rollers 144a and 144b can easily extend the glass rod 106 at high temperatures. The surfaces of the extension rollers 144a and 144b that contact the glass rod 106 are gradually deformed by high temperature and pressing force or the frictional force of the glass rod 106. Because the deformations of the extension rollers 144a and 144b are gradually different from each other, the rotation speeds of the surfaces of the extension rollers 144a and 144b will also be different. Fig. 15 shows a deformation view of the surfaces of the extension rollers 144a and 144b. The outer shape of the extension roller 144a and the outer shape of the extension roller 144b are: This paper size applies to the Chinese National Standard (CNS) A4 specification (210 X 297 public love) (Please read the precautions on the back before filling this page)

Employees' Cooperative Cooperative Prints of the Intellectual Property Bureau of the Ministry of Economic Affairs 548250 5S4 (Spifd4Hnc / 008 Λ7 B7 Printed by the Consumers Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. The invention description (β) is different. The number of batches is the glass base material 102 The number of them is extended. If the number of batches increases, the deformation and wear will increase. As a result, the number of extensions between the extension rollers 144a and l44b will be different, resulting in the heat-softened area of the glass base material 102. The position of the metal rod changes and sequentially causes the bending of the glass rod 106. Figure 16 shows the heating of the metal tube when the metal tube system is loaded by the extension rollers 144a and 144b of the batch number 300 shown in Figure 15 Displacement map of the center position of the area. The vertical axis represents the displacement of the center position of the heated area of the metal tube, and the horizontal axis represents time. Curve A represents the change in the number of deviations in the rotation direction of the extension rollers 144a and 144b. Curve A It shows that during the single rotation of the extension rollers 144a and 144b, the displacement changes greatly. Curve B shows the displacement of the extension rollers 144a and 144b in the axial direction. The change is very small. Figure 17 shows a displacement map of the center position of the heat-softened area through the first extension device 402 in the embodiment. The vertical axis represents the center of the heat-softened area of the glass base material 102. The displacement of the position, and the horizontal axis represents the time from the beginning of the extension. After 15,000 seconds from the beginning of the extension, the displacement of the thermally softened area will be controlled and maintained at a small level. Therefore, each extension is controlled separately. The rotation speeds of the rollers 144a and 144b can produce a glass rod 106 without solid bending. This allows the center position of the heat-softened area to be maintained at a relatively fixed point. (Comparative Example) Figure 18 shows when the extension Diagram of the change in the center position of the heat-softened area when the rotation speed of the rollers l44a and 14 is controlled at the same rotation speed. The vertical axis represents the displacement of the center position of the heat-softened area of the glass base material 102, and the horizontal axis represents from the beginning Extended time. This paper size applies Chinese National Standard (CNS) A4 specification (21〇X 297 public love) ------------ · -------- t ---- ----- (Please read the back first Please fill in this page again) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 548250 A7 ^ S46pifd4.dor / nn «B7 V. Description of the invention) Measure the glass foundation by using the same diameter measuring device 152 as shown in Figure Π The diameter of the heat-softened area of the material 102 can produce a glass rod 106 having a predetermined diameter. The rotation speeds of the extension rollers 144a and M4b are controlled at the same rotation speed with each other. The change in the center position of the heat-softened area is so large that the bending caused by the extended glass rod 106 needs to be corrected. Fig. 19 shows another embodiment of the burner 176 used in the glass rod melting device 370 of Fig. 5. The annular burner 176 has a hydrogen supply pipe 190 and an annular gas inlet 194, both of which are connected to an oxygen supply pipe 192. The cooling water 196 is connected to the cooling water supply pipe 198 and the cooling water discharge pipe 200, and it is provided on the outer area of the annular burner 176. The annular gas inlet 194 may be a single layer for ejecting a mixture of hydrogen and oxygen. The annular gas inlet 194 may also be multi-layered or triple-layered, which ejects hydrogen from the upper and lower layers and oxygen from the middle layer. After hydrogen and oxygen are supplied to the ring burner 176 and burned, the glass rod 106 is placed inside the ring of the ring burner 176. The surface of the glass rod 106 is melted by the flame 178. The annular burner 176 can effectively heat the glass rod 106, so it is not necessary to excessively heat the glass rod 106. Therefore, when the glass is heated to a temperature above 2000 degrees Celsius, the opaque areas on the glass surface cannot be seen on the melting surface of the glass rod 106. According to the above embodiment, the glass rod 106 is melted. A glass base material 102 having a diameter of 120 mm is heated by a ring burner 176 for ten minutes. Hydrogen is supplied to the annular burner 176 at a rate of 300 liters / minute and oxygen at a rate of 120 liters / minute. When the glass rod 106 is melted, the glass rod 106 is melted by extension. The melting surface of the glass rod 106 will change to the shape of a round rudder. The color of the surface of the glass rod 106 is transparent. This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling this page) 0 IT --------- line "A, 548250 SS46mfH4 H 〇c / 0Q8 _ B7____ 5. Description of the invention (> Ί) Figure 20 shows the structure diagram of the glass rod conveying device 380. The glass rod conveying device 380 is used for conveying the glass rod 106 produced through the first extension device 402. The glass rod 106 is supported by a movable support member 245 and a fixed support member 246 mounted on the cylinder storage box 244. When a cylinder (not shown) in the cylinder storage box 244 is driven, the movable support element 245 moves toward the fixed support element 246 to support the glass rod 106. The force with which the movable support element 245 pushes the fixed support element 246 can be modified by modifying the air pressure flowing into the cylinder. During the transmission of the glass rod 106, the cylinder pressure can be modified by operating a switch. This switch is provided on the operation switch box 248. This embodiment has a second thrust level for pushing the movable support element 245 to the fixed support element 246. This can be achieved by adjusting one of the two possible levels of air pressure into the cylinder. For example, the weak side of the thrust pushing the movable supporting element 245 to the fixed supporting element 246 is the first supporting force, and the strong side of the thrust is the second supporting force. The first support force was set at 0.5 kg, and the second support force was set at 80 kg. There are only two adjustment levels for cylinder air pressure adjustment. The pressure adjustment can be a multi-level adjustment type to adjust the air pressure more than three levels, or a continuous adjustment type to provide a stepwise level change. The rotating actuator 250 rotates the movable supporting element 245 and the fixed supporting element 2 through the cylinder storage box 244, and is used to rotate the glass rod 106 from a vertical state to a horizontal state. A holding flame 252 supports the glass rod conveying device 380 by connecting the glass rod conveying device 380 and the first extension device 402. A handle 254 is used to operate the glass rod conveying device 380. The rotation shaft 256 is used to rotate the cylinder storage box 244. 30 This paper size applies to Chinese national standards (CNSM4 specifications (210 X 47)) --- (Please read the precautions on the back before filling out this page) Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs ----- ---- Line IAW --------- Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 548250 A7 --- ^ 5546nifd4.doc / 008_ B7__ V. Description of the invention (7¾) Figure 21 is not It is a schematic diagram of the storage container 224 of the first extension device 402. The storage container 224 has a tray 260, a support 262, a pair of support members 234a and 234b for supporting the glass rod 106, and a pair of support members 236a and 236b are provided in Below the supporting elements 234a and 234b. The supporting elements 234a, 234b, 236a, and 236b are generally semi-circular, which surely supports the glass rod 106 in the storage container 224. Each other, each pair of supporting elements 234a and 234b and the support The elements 236a and 236b form a circular support element. One end of each of the support elements 234a and 234b and the support elements 236a and 236b is connected to the pillar 262. The other end is connected to the corresponding pair of support elements via a shaft pin 257 or a shaft pin 258. Elements 234a and 234b pass The nails 257 are connected, and the supporting elements 236a and 236b are connected through the shaft nails 258. The height of the pillar 262 is 1550mm. The inner diameter of the tray 260 is 300mm. The inner diameter of each supporting element is 180mm, which is passed through the supporting element pairs 234a and 234b and Supporting element pairs 236a and 236b are formed. In the receiving storage container 224, the glass rod 106 has an outer diameter of 80mm, and the angle of inclination α between the pillar 262 and the glass rod 106 can range from- 3.1 degrees to +8.1 degrees. The angle of inclination between the glass rod 106 and the pillar 262 can range from -5.9 degrees to +5.9 degrees in the left and right directions. Here, the angle of inclination is a finite 値The glass rod 106 can be received in the storage container 224 at various angles within this limited frame. The glass rod 106 is located in the storage container 224 at various angles. Figure 22 shows that when the glass rod 106 is transported, the glass rod 106 Movement diagram of the conveying device 380. The glass rod 106 in the storage container 224 is supported by a movable support member 245 and a fixed support member 246 having a first supporting force (b). Next, the glass rod 106 is To make the glass rod 106 stand vertically. The paper size is applicable to China National Standard (CNS) A4 (210 X 297). ------------ · -------- ^- -------- (Please read the notes on the back before filling this page) A7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 548250 V. Description of the invention d) The ground is inside the supporting elements 234a and 234b (C ). Because the first supporting force is very weak, during the movement of the glass rod 106, when the force is greater than the first supporting force supplied to the movable supporting element 245, the movable supporting element 245 will be opened. Moreover, the friction force between the movable support element 245 and the glass rod 106 will act, and the friction force between the fixed support element 246 and the glass rod 106 will be relative to the weight of the glass rod 106 Is very small. Therefore, the glass rod 106 is supported by the first supporting force so that the glass rod 106 cannot be lifted by the glass rod conveying device 380. After it is determined that the glass rod 106 stands vertically, the supporting force of the glass rod conveying device 380 is changed to the second supporting force (d). Then, the pins 257 and 258 are removed, and each of the supporting members 234a and 234b and the supporting members 236a and 236b are opened. Then, the glass rod conveying device 380 grasps the glass rod 106 and transfers it out of the storage container 224. The glass rod 106 removed from the storage container 224 is rotated to a horizontal position and placed on a storage place. During the horizontal placement of the glass rod 106 on the storage site, an air pressure greater than a certain pressure will be supplied to the cylinder to raise and lower the glass rod conveying device 380. Therefore, the weight of the glass rod conveying device 380 is not supplied to the glass rod 106 to prevent the glass rod 106 from being injured. FIG. 23 illustrates another embodiment of the glass rod conveying device 380. The glass rod conveying device 380 of this embodiment has two rotation mechanisms A and B. Each rotation mechanism A and B has a rotation actuator. The rotation mechanism A rotates the glass rod 106 by rotating the rotation axis 2% by a rotation actuator 25. The rotation mechanism B rotates a rotation shaft 268 through the rotation actuator 264, and moves the glass rod 106 up and down or left and right through the connection shaft 266. The rotation axis 268 lies horizontally or vertically at right angles to the rotation axis 256. 32 -------------------- Order --------- ^ J ^ w— (Please read the notes on the back before filling this page) Paper size applies to China National Standard (CNS) A4 (210 X 297) 548250 Λ7

Mingwuming (Figure 24 shows the movement of the glass rod conveying device 380 when the glass rod conveying device 38o conveys the glass rod 106. Figure 24 (a) shows the glass rod The plan view of the conveying device 380 supports the glass rod 106. Figure 24 (b) is a cross-sectional view showing the glass rod conveying device 380, which conveys the glass rod 106 to the V block 240. As shown in section 24 (a) As shown in the figure, the movable supporting elements 245 and 246 vertically support the glass rod 106, and the glass rod 106 can be rotated from the vertical position to the horizontal position by operating the rotary actuator 250. Then, as shown in section 24 (b) As shown, the movable support element 245 and the fixed support element 246 are rotated downward by turning the rotary actuator 264. By activating the rotary actuator 264, the opening and closing directions of the movable support element 245 are changed from The vertical direction is changed to the horizontal direction. Therefore, after opening the movable supporting element 245 and placing the glass rod 106 on the V block 240, the movable supporting element 245 and the fixed supporting element 246 can be released upward. Rotating mechanism A rotating glass rod 106 from vertical The horizontal position, and the rotation mechanism B has another rotation axis 268 and the rotation axis 256 lying at right angles, thereby increasing the transmission efficiency of the glass rod 106. Fig. 25 shows the second extension device 111 of the glass rod of the present invention. Architecture diagram. The second extension device 111 of the glass slab includes a support Π2, a fixed clip 118, a movable clip 119, a heating source 122, a flow controller 278, end support brackets 114 and 116, and a tail. End support frame drive motor 275, a tail end support frame drive encoder 273, a diameter measuring device 24, a mobile support 120, a sliding pusher 270, a mobile support motor 274, a mobile support encoder 272, a A chain 276 and a control unit 280. The fixed clip Π8 and the movable clip n9 support the glass rod 106, and a virtual rod 108 is connected at each end thereof. The heating source 122 is heated via the fixed card 33. This paper size is applicable China National Standards (CNS) A4 Specification (210 X 297 mm) (Please read the notes on the back before filling out this page) # Printed by the Employees ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs

一 OJ_ bn n Βϋ ϋ n ϋ ϋ I n I nn · _ϋ n * ϋ ii ϋ ϋ. ^ 1 i ι ί in ϋ I Printed clothes by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 548250 A7 5 546difd4.doc / 00 8 B7 V. Description of the invention (y) The glass rod 106 supported by the clamp 118 and the movable clamp 119. The flow controller 278 g rounds the amount of gas supplied to the heating source 12 2. By moving the movable clip 1 19, the tail end support 116 extends the glass rod 106. The tail end support frame driving motor 275 drives the tail end support frame 116. The tail end support frame drive encoder 273 detects the number of rotations and controls the speed of the tail end support frame drive motor 275. The moving distance of the tail end support frame 1 16 can be estimated from the number of rotations of the tail end support frame drive motor 275 detected by the tail end support frame drive encoder 2 7 3. The diameter measuring device 124 measures the diameter of the glass rod 106 corresponding to a position along the axis direction of the glass rod 106. The heating source 122 and the diameter measuring device 124 are provided on the moving bracket 120. The moving bracket 120 moves the heating source 122 and the diameter measuring device 124. A mobile stand 120 is provided on the pallet 112. The moving bracket 120 is movable along the sliding pusher 270, and is mounted parallel to the axis connecting the fixed clip 118 and the movable clip 119. The moving stand 120 is driven by the moving stand motor 274 through the slide pusher 270. The moving bracket encoder 272 controls the speed of the moving bracket motor 274. The control unit 280 controls the moving distance of the heating source 122 by controlling the moving bracket encoder 272, the moving bracket motor 274, the chain 276, the sliding pusher 270, and the moving bracket 120. The control unit 280 controls the amount of gas supplied to the heating source 122 via a control flow controller 278. The control unit 280 controls the moving speed of the tail end support frame 116 by controlling the tail end support frame drive encoder 273, and the tail end support frame drive encoder 273 is used to control the rotation speed of the tail end support frame drive motor 275. The control unit 280 controls the extension speed of the glass rod 106 by controlling the moving speed of the tail support frame Π6. The tail end support frames 114 and 116, the fixed clip 118, the movable clip 119, the tail end support frame drive motor 275 and the tail end support frame drive encoder 273 constitute the paper standard. ^ Use Chinese National Standard (CNS) A4 specifications ( 21〇χ 297 mm) ---- ^ ϋ I ϋ n 1 ϋ ϋ ϋ ϋ —ϋ ϋ ^ 1 ϋ I n ϋ ϋ 1 0, 1 ϋ 1 II ϋ ϋ I ϋΑ (Please read the precautions on the back first (Fill in this page again) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 548250 A7 < 46nifd4 Hnr / 〇〇8 β7 V. Description of the invention (V) An extension unit for extending the glass rod 106. The measured diameter and position data can be measured by the diameter measuring device 124, and the data on the length change of the glass rod 106 can be input from the control unit 280 to the movement of the tail support frame 116 Distance to get. The control unit 280 controls the heating condition according to input data such as the moving distance of the heating source 122 and the amount of gas provided to the heating source Π2, and also controls the extension speed of the tail end support frame 116 according to the input data. Fig. 26 is a detailed flowchart of the second stretching process (S206) of the glass pulling in Fig. 4. First, the virtual rod 108 is supported via a fixed clip 118 and a movable clip 119. Subsequently, both ends of the glass rod 106 are connected to the virtual rod 108 (S146), so that the glass rod 106 is placed on the glass rod second extension device 111. Next, a 3mm deep cut 284 is made as the same mark on the connection between the glass rod 106 and the virtual rod 108. Next, the start and finish positions of the diameter measurement of the glass rod 106 and the target diameter are set (S150). The diameter of the glass rod 106 corresponding to the position along the axis of the glass rod 106 is measured (S152). Based on the measured diameter and position corresponding to the measured diameter, the extension speed in a plurality of positions along the axis direction of the glass rod 106 is set. Based on the average diameter of the diameter of the glass rod 106, a heating condition including the amount of gas supplied to the heating source 122 and the moving distance of the heating source 122 is set (S153). The glass rod 106 is heated by a heating source 122 having a preset heating condition, and gradually extended by a tail end support frame 116 having a preset extension speed. In order to detect the positions of the two ends of the glass rod 106, the diameter measuring device 124 then detects the position of the cutout 284 provided around the connection between the glass rod 106 and the virtual rod 108. In order to measure the length of the glass rod 106 along the axis direction, the paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 public love) (Please read the precautions on the back before filling this page). τ »ϋ I n · ϋ i-ϋ II alai Hi ϋ 1 ϋ n I ϋ -I n ϋ I · ϋ n 1.1 I ϋ I n II 印 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 548250 _S46nifd4.doc / 008_ Β7 _____ 5. The description of the invention (M) changes, and the encoder 273 is driven to measure the moving distance of the tail support 116 via the tail support. Next, the diameter of the glass rod 106 is measured at a position about 50 mm from the cutout 284 toward the center of the glass rod 106 (S156). The heating position of the heating source 122 is set based on the position of the cutout 284 and the length change of the glass rod 106 along the axis direction. The amount of gas provided to the heating source 122 is set according to the measurement diameter. The moving speed of the tail end support frame Π6 is set according to the measured diameter (S157). The glass rod 106 is heated and extended under a preset heating condition and extension speed, so that the glass rod 106 is pulled out by the tail end. The shape of the rear end of the glass rod 106 thus becomes a cone-like shape, so that the diameter of the rear end of the glass rod 106 is reduced (S158). Then, the position of the tail-end drawn portion is detected by measuring the diameter of the tail-end drawn portion, and the portion is extended by pulling out at the corresponding end of the tail-end portion. The change in the length of the glass rod 106 along the axis direction is caused by pulling the tail end of the encoder 273 to measure through the tail end support frame (S160). Then, the start and finish positions of the flame polishing for polishing the glass rod 106 with the flame and the heating power of the flame are set. This setting is based on the detection position of the pulled-out part of the tail end and the length of the glass rod 106 along the axis direction (S161). According to the position of the black shadow on the glass rod 106, the positions for starting and completing the flame honing are set. During the tail-end pull-out process, black shadows are generated in one of the areas that is strongly heated. The glass rod 106 is flame-honed by the heating source 122 as each preset flame condition from the set flame honing start position to the set flame honing completion position (S162). After flame honing, the shape of the glass rod 106 is checked by measuring the completed diameter and length of the glass rod 106 (S164). The virtual pole 108 is then removed from the glass pole 106 (S166). Finally, the glass rod 106 is subjected to surface treatment to produce a preform 107 (S168). ------------- 螓 (Please read the notes on the back before filling out this page) Order ------- I IAW -------- 36 paper size _Medium (CNS) A4 specifications 〇〇 297 public meal y 548250 A7 " " " " " '.doc / 0 0 8 B7 V. Description of the invention (ice) As mentioned above, in each extension ( S154), tail end pull-out (S158), and flame honing (SIM) before the diameter is measured at a corresponding position along the axis of the glass rod 106. From this data, the heating condition and extension speed for the next process can be accurately set. Therefore, a stable and high-quality glass rod 1 06 can be manufactured. FIG. 27 shows an example of the cooling device 330 provided on the fixed clip 118 and the movable clip 119 of the second extension m of the glass rod. . The cooling device 330 protects the fixed clip 118 and the movable clip 119 from the radiant heat generated from the heating source 122. This can be achieved by circulating cooling water around the fixed clip 118 and the movable clip 119. The cooling device 330 uses a gas or a liquid as a cooling medium. The cooling device 330 can be provided on the fixed card holder Π8 and the movable card holder 119 to control the deformation of the fixed card holder 118 and the movable card holder 119. This allows controlling the temperature rise of the fixed clip 118 and the movable clip 119. Therefore, the transmission accuracy of the driving force of the rotating glass rod 106 is maintained, and the heating effect of the glass rod 106 becomes more equal. Therefore, the variation in the diameter of the glass rod 106 is reduced. (Example) Through a fixed clamp 118 and a movable clamp 119 with a cooling device 330 and a heating source 122 as shown in FIG. 27, a glass rod 106 with a diameter of 50 mm and a length of 1000 mm is flame-honed by flame. 150 SLM oxygen ( 02) and 300 SLM hydrogen (H2) is supplied to the heating source 122 as a combustion gas. The glass rod 106 is rotated at a speed of 15 rpm. The glass rod 106 is flame-honed by moving the heating source 122 at a speed of about 20 mm / min. Figure 28 shows the fixed card of the above example and the following comparative example (please read the precautions on the back before filling out this page) · _ Printed by the Intellectual Property Bureau Staff Consumer Cooperatives of the Ministry of Economic Affairs ^^ a-0, »mn ϋ— ϋ ϋ · ϋ I n ϋ nn ϋ II ϋ ϋ ϋ ϋ I ϋ m -I- n ι · ϋ ϋ ϋ ϋ This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) 548250 Economy Printed by the Consumer Cooperatives of the Ministry of Intellectual Property Bureau, ---------------------- B7_ V. Description of the Invention (A) Folder 118 and removable card holder 119 Temperature graph. The vertical axis represents the temperature of the fixed clamp 118 and the movable clamp 119, and the horizontal axis represents the flame honing time. The temperature of the exemplary fixed clip 118 and the movable clip 119 is maintained at a low temperature of about 45 degrees (45 ° C). Through the small deformation of the fixed clip 118 and the movable clip 119, the driving force of the rotating glass rod 106 is changed. Therefore, the diameter change of the flame-honed glass rod 106 is only 0.02%. (Comparative example) In the case where the cooling device 330 is removed from the fixed clip 118 and the movable clip 119 in FIG. 27, the glass rod 106 was honed by flames under the same conditions as in the example above. As shown in FIG. 28, the temperature of the fixed clip 118 and the movable clip 119 reaches about 100 degrees Celsius. As the fixed clip 118 and the movable clip 119 are deformed, the driving force of the rotating glass rod 106 is changed. After the flame honing is increased to 1.0%, the variation in the diameter of the glass rod 106 will be greater than the variation in the above example. FIG. 29 shows the relationship between the distance between the heating source 122 and the diameter measuring device 124 and the percentage change in the diameter of the glass rod 106. The change rate (%) of the diameter of the glass rod 106 represents (the maximum diameter of the glass rod 106-the minimum diameter of the glass rod 106) / (average diameter) x 100. The diameter measuring device 124 of the second extension device ill of the glass rod shown in FIG. 25 is provided at a position which is a certain distance from the heating source 122 from 10 mm to 50 mm. Therefore, the diameter of the glass rod 106 can be accurately measured, allowing the diameter of the glass rod 106 to be accurately controlled. When the glass rod 106 is extended, 'the position of the highest temperature of the glass rod 106 will be slightly different from the position heated by the heating source 122 due to the movement of the heating source 122 ------------------ --- Order --------- line-win (please read the notes on the back before filling this page) 38

548250 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Λ7 ^ S46pifH4, Hor / nnR__B7 _ V. Description of the invention). In the position of the highest temperature of the glass rod 106, the extension speed per unit becomes the maximum. It is desirable to control the heating power of the heating source 122 and the moving speed of the movable clip 119 based on the diameter and the diameter target of the position of the maximum extension speed. The moving speed of the movable clip 119 is controlled based on the difference between the diameter target 値 and the diameter measured at the position of the maximum extension speed of the glass rod 106. This can be accomplished by providing a diameter measuring device 124 at a distance from the heating source 122. The above-mentioned position at a certain distance from the heating source 122 ranges from 10 mm to 50 mm from this position, wherein the heating source 122 is provided in a direction opposite to the moving direction of the heating source 122. Therefore, the diameter measuring device 124 is provided at a position from 10 mm to 50 mm from the heating source 122, wherein the heating source 122 is located in a direction opposite to the moving direction of the heating source 122. If the heating source 122 used to heat the glass rod 106 is an oxyhydrogen burner, the flow rate of the hydrogen gas supplied to the heating source 122 is set from 30 liters / minute to 500 liters / minute. The ratio of the hydrogen to oxygen flow rate is set from 1.5 to 3.0. The moving speed of the heating source 122 is controlled within the limits of 2 mm / min and 65 mm / min. If the flow rate of hydrogen is less than 30 liters / minute, the heating capacity will be insufficient, and if the flow rate of hydrogen is more than 500 liters / minute, the fuel will be wasted. If the ratio of the flow rate of hydrogen to oxygen is outside the above range, it will be difficult to extend the glass rod 106 at this time due to insufficient heating. If the heating source 122 used to heat the glass rod 106 is a propane gas burner, the flow rate of the propane gas supplied to the heating source 122 is set from 1 liter / minute to 15 liter / minute. The ratio of propane gas to oxygen flow rate is set from 0.1 to 0.3. The moving speed of the heating source 122 is controlled at 2mm / min and 65h scale. Applicable to China National Standard (CNS) A4 size 〇 × 297 meals. (Please read the precautions on the back before filling this page) --- ------ M— ^ w ------------------------ A7 548250 ^^ dfsplfdd Hor / OOR_ _____ V. Description of the invention u?) (Please read the precautions on the back before filling out this page) Within the limit of mm / min. If the flow rate of propane gas is less than 1 liter / minute, the heating capacity will be insufficient, and if the flow rate of propane gas is more than 15 liters / minute, fuel will be wasted. In addition, if the ratio of the propane gas to the flow rate of oxygen is outside the above-mentioned range, it becomes difficult to extend the glass rod 106 at this time because the heating amount becomes insufficient. The moving speed of the heating source 122 is preferably controlled within the limits of 2 mm / min and 65 mm / min. If the moving speed of the heating source 122 is lower than 2 mm / min, it takes more time to extend the glass rod 106. In contrast, if the moving speed of the heating source 122 is higher than 65 mm / min ', since the speed of heating the glass rod 106 to its central portion is too fast, it will be difficult to extend the glass rod 106 at this time. (Example 1) By setting the distance between the heating source 122 and the diameter measuring device 124 to 15 mm, the extension of the glass rod 106 is started. During the extension of the glass rod 106, the moving speed of the heating source 122 and the tail end support frame 116 is controlled based on the difference between the measured diameter of the glass rod 106 and the target diameter '. The combustion conditions of the heating source 122 are set to include a hydrogen flow rate of 224 liters / minute ', a ratio of hydrogen to oxygen flow rate of 2.5, and a moving speed of the heating source 122 of 11 mm / min. The rate of change in the diameter of the glass rod 106 was 0.9% after the extension process. (Example 2) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Set the distance between the heating source 122 and the diameter measuring device 124 to 40 mm. The flow rate of hydrogen was set at 199 liters / minute. The ratio of hydrogen to oxygen flow rate is set to 2.5. The moving speed of the heating source 122 is set to 13 mm / min. The rate of change in the diameter of the glass rod 106 was 0.6% after the extension process. (Comparative Example 1) The distance between the heating source 122 and the diameter measuring device 124 was set to 5 mm. The flow rate of hydrogen was set at 209 liters / minute. Proportion of the flow rate of hydrogen to oxygen 40 This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 issued) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 548250 A7 V. Invention description py) Set to 2.5. The moving speed of the heating source 122 is set to 12 mm / min. Because the distance between the heating source 122 and the diameter measuring device 124 is too close, the rate of change in the diameter of the glass rod 106 after the extension process is 3.7%. This is greater than the rate of change of Examples 1 and 2 above. (Comparative Example 2) The distance between the heating source 122 and the diameter measuring device 124 was set to 60 mm. The flow rate of hydrogen was set to: 237 liters / minute. The ratio of hydrogen to oxygen flow rate is set to 2.5. The moving speed of the heating source 122 is set to 10 mm / min. Because the distance between the heating source 122 and the diameter measuring device 124 is too far, the variation rate of the diameter of the glass rod 106 after the extension process is 2.5%. This rate of change is greater than the rate of change of Examples 1 and 2 above. (Comparative Example 3) The distance between the heating source 122 and the diameter measuring device 124 was set to 15 mm. The flow rate of hydrogen was set at 215 liters / minute. The ratio of hydrogen to oxygen flow rate is set to 1.0. The moving speed of the heating source 122 is set to 12 mm / min. Because the ratio of hydrogen to oxygen flow rate is 1.0, which is less than the recommended minimum of 値 1.5, the glass rod 106 cannot be extended. (Comparative Example 4) The distance between the heating source 122 and the diameter measuring device 124 was set to 15 mm. The flow rate of hydrogen was set at 195 liters / minute. The ratio of hydrogen to oxygen flow rate is set to 4.0. The moving speed of the heating source 122 is set to 13 mm / min. Because the ratio of the hydrogen to oxygen flow rate is 4.0, which is greater than the recommended maximum 値 3 · 0 ', the glass rod 106 cannot be extended. (Comparative Example 5) The distance between the heating source 122 and the diameter measuring device 124 was set to 15 mm. This paper size applies to China National Standard (CNS) A4 specification (21〇X 297 public reply) ------------ · -------- Order -------- -Line (Please read the precautions on the back before filling this page) 548250 A7 S5 46pifd4.doc / 008 ___B7 V. Description of the invention (correction) The flow rate of hydrogen is set to 204 liters / minute. The ratio of hydrogen to oxygen flow rate is set to 2.5. The moving speed of the heating source 122 is set to 70 mm / min. Because the moving speed of the heating source 122 is 70 mm / min, which is greater than the recommended maximum moving speed of 65 mm / min, the glass rod 106 cannot be extended. FIG. 30 does not show a structural diagram of the second extension device 111 of the glass rod, which has a structure in which a force measuring device 282 is provided on the second extension device 111 of the glass rod shown in FIG. 25. The glass rod second extension device 111 has a force measuring device 282 for measuring the tension supplied to the glass rod 106 on the movable clip Π9. The second extension device 111 of the glass rod uses a moving bracket encoder 272 to detect the position of the heating source 122 on the moving bracket 120. The tension measurement device 282 is connected to the control unit 280. The control unit 280 controls the moving speed of the tail end support frame 116 according to the tension of the glass rod 106 provided from the tension measuring device 282. This is continued until the moving distance of the heating source 122 reaches a prescribed distance. Fig. 31 shows a detailed flowchart of the extension process (S154) of Fig. 26. First, the glass rod 106 is preheated until a predetermined area of the glass rod 106 is melted and softened by the heating source 122. This will allow the glass rod 106 to be extended (S132). Then, the heating source 122 located on the moving support 120 is moved through the moving support 120. In the early extension stage, it is desirable that the moving speed of the heating source 122 is as slow as possible so that the variation in the diameter of the glass rod 106 can be reduced. The movement of the heating source 122 may be a certain speed. The amount of gas supplied to the heating source 122 may be quantitative. Next, control the movement speed of the tail end support frame Π6 so that the tension of the glass rod 106 measured by the tension measuring device 282 is generally in a stable state. 42 This paper size is in accordance with China National Standard (CNS) A4 (210 X 297 mm). Hair) ------------- t (Please read the notes on the back before filling this page)

tr --------- Line II Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by 548250 Produced by A7 with 46Difd4.doc / 0O8 B7 V. Description of the Invention (Sin) The average tension is within 80% to 110% (S136). This steady state will be explained below. The moving speed of the tail end support frame 116 is initially set according to the diameters of the plural positions of the glass rod 106 along the axis direction, and is reset according to the tension of the glass rod 106. The glass rod 106 is extended by the above-mentioned tension load 'until the heating source is moved substantially by 50 mm to 150 mm (S138). If the control unit 280 detects that the heating source 122 has generally moved from 50 mm to 150 mm (S138), the moving speed of the tail end wiper frame 116 is changed to a speed in a steady state, which will be explained below. This can be done by controlling the rear end support to drive the knitting horse 273 (S140). During the extension of the glass rod 106, the diameter measuring device 124 measures the diameter of the glass rod 106 (S142). When the glass rod 106 is extended to the desired diameter and length, the extension of the glass rod 106 is completed (S144). The speed in the steady state is the material balance before the extension and the speed after the balance is extended. Here, the initial diameter of the glass rod 106 is represented by D before the extension, the obtained target diameter is represented by D2, the moving speed of the heating source 122 is represented by Vi, and the extension speed of the glass rod 106 is represented by V2. For example, suppose that the extension occurs only in the heated area, so that the heated area and extension are very small. When the following equation is valid, V2 is equivalent to the speed in a steady state. D12Vi = D22 (V1 + V2) Therefore, v2 can be set by adjusting the moving speed of Vi and tail end support frame 116 according to 0 and d2. In the steady state, the tension of the glass rod 106 is the speed when the glass rod 106 is moved at the tail of the stable speed_support frame 116 is extended. Figure 32 shows 43 paper sizes that vary in diameter during the extension of the glass rod 106. The Chinese paper standard (CNS) A4 (21〇χ 297 g) is applicable. (Please read the precautions on the back before filling (This page) # 一 ° J · I— ϋ l II «ϋ ϋ ϋ nn ϋ» ϋ n ϋ n ϋ m ϋ II n Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 548250 A / _ ^ ^ η ϊ fH zl Η nr / Π Π R _Β7 V. Description of the invention (...) Process diagram. When heated, the glass rod 106 softens. As shown in Fig. 32 (1), it may happen that the glass rod 106 cannot be sufficiently softened only by the preheating extension. When the heating source 122 and the tail end support frame 116 start moving at a predetermined speed, the tension generated on the glass rod 106 will increase from twice the normal tension to three times the normal tension. Then, the pre-heated area will be quickly extended, and the pre-heated diameter will be reduced to the shaded portion shown in Figure 32 (2). The extension of the glass rod 106 occurs almost entirely in the pre-heated area, which is reheated by the heating source 122 and extended a small amount. Therefore, the neck of the diameter will occur on the glass rod 106, as shown in Fig. 32 (3). A change in the diameter of the glass rod 106 easily occurs in an area from the extended starting place of the glass rod 106 to a place 50 mm from the starting place. If the extension is more advanced than this place, the glass rod 106 providing heat to the glass rod 106 will soften and the extension speed of the glass rod 106 will be balanced to a stable state. Therefore, a change in the diameter of the glass rod 106 will not occur, as shown in Fig. 32 (4). The glass rod 106 can be extended by controlling the moving speed of the tail end support 116. This aim is to maintain the tension of the glass rod 106 at the early extension stage to be approximately 110%, or less than the average tension of the tension in the steady state. Variations in diameter during the early extension phase of the glass rod 106 can therefore be reduced. This is because the heat supplied to the glass rod 106, the softening speed of the glass rod 106, and the extension speed of the glass rod 106 can be balanced. If the tension of the glass rod 106 is lower than the stable state of 80% in the early extension stage, the distance of the diameter of the glass rod 106 to reach the target diameter needs to be longer. Therefore, the area of the extended glass rod 106 that can be used as a product is shortened. This reduces the yield factor of the production process and increases the time it takes for the glass rod 106 to reach the target diameter. Therefore, what I want is to control the glass rod 106 44 in the early extension phase. Read the notes on the reverse side and fill out this page) This paper size applies the Zhongguanjia Standard (CNS) A4 specification (21GX 297) 548250 V. Description of the invention) The tension is generally from 80% to 110% in a stable state The range of average 値. Fig. 33 shows a process of extending the glass rod 106 according to the extension process (S154) of Fig. 31. First, as shown in Figs. 33 (1) and (2), after the preheating of the glass rod 106, the heating source 122 and the tail end support frame 116 start to move to start the extension of the glass rod 106. Since the tension of the glass rod 106 is controlled at 110% or less, the excessive tension is not supplied to the glass rod 106. Due to the rapid extension, no neck will occur on the glass rod 106. If the heating source 122 moves a predetermined distance under this equilibrium condition, the heat supplied to the glass rod 106, the softening speed of the glass rod 106, and the extension speed of the glass rod 106 will be balanced. Therefore, variations in the diameter of the glass rod 106 can be prevented. If the movement speed of the tail end support Π6 is continuously controlled according to the tension, the diameter change may occur. The tension of the glass rod 106 will change as the amount of heat provided by the heating source 122 changes. The moving speed of the tail end support frame 116 is then changed to maintain the tension of the glass rod 106 at a certain level, resulting in a change in the diameter of the extended glass rod 106. Therefore, after starting to extend the upper heating source 122 to move a predetermined distance, a change in the diameter of the glass rod 106 caused by a delicate tension change can be prevented by changing the speed of the tail end support frame 116 to a stable state. Until the heating source 122 moves 50 mm from the start extension point, the heat supplied to the glass rod 106, the softening speed of the glass rod 106, and the extension speed of the glass rod 106 will not be balanced. As a result, before the heating source 122 moves 50 mm, if the extension speed is changed to a steady state speed, the neck of the glass rod 106 will occur due to the change in diameter. Therefore, the tension of the glass rod 106 needs to be controlled at about 110% or less, until the heating source 122 moves about 50 mm. What I want is that when adding 45 paper sizes to the Chinese national standard (CNSM4 specification (210 X 297 public)) (Please read the precautions on the back before filling this page) -------- Order-- ------- line. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 548250 q < d6pifrU rW / n _ only _ϋί ________ V. Description of the invention (ο) The heat source 122 moves more than approximately 150mm Before, the moving speed of the tail end support frame 116 was changed to a steady state speed. (Example) The glass rod 106 will be extended by the glass rod second extension device 111. The glass rod 106 has an outer diameter of 65mm and a length of 980mm. A virtual rod 108 has an outer diameter of 60mm and a length of 25mm. It is attached to both ends of the glass rod 106. During the connection between the glass rod 106 and the virtual rod 108, the rotation speed around the axis is 30rpm. Hydrogen and oxygen burners are used as the heating source 122. The oxygen and hydrogen supplied to the force [] heat source 122 are 96 liters / minute and 240 liters / minute, respectively. After the preheating of the glass rod 106, the mobile heating source is passed 122 The extension of the glass rod 106 was started at a moving speed of 12.4 mm / min. When the glass rod 106 is extended to reduce the diameter of the glass rod 106 from 65mm to 50mm, the tension in the steady state is about 100ksf / cm2, and the moving speed of the tail end support 116 in the steady state is 8.6mm / Min. Control the moving speed of the tail end support frame 116 so that the tension will not exceed 110kgf / cm2 until the heating source 122 moves 100mm from the start point of extension. After the heating source 122 moves 100mm, it is controlled by the tail end support frame 116. Move the speed to 8.6 mm / min to extend the glass rod 106, which is the speed in the steady state. Figure 34 shows the tension change of the glass rod during the early extension phase of the example. The vertical axis represents the glass rod 106 The generated tension and the horizontal axis represent the distance traveled by the heating source I22 after the start of the extension. When the heating source 122 moves forward, the tension of the glass thousand 106 is I10 kgf / cm2 or less in the early extension stage. 36 The figure shows that after the extension of the glass rod 106, the glass rod 106 is the paper size applicable to the Chinese National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before filling in this ) Φ Order --------- Line-Stupid printed by the Employees ’Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the Employees’ Cooperatives of the Intellectual Property Bureau of the Ministry of Economy 548250 A7 _S S 46nifr | 4 Η〇Γ / ΠΠ «Β7 5 2. Explanation of the diameter change of the invention description (i). The vertical axis represents the distance along the radiation direction of the glass rod 106, and the horizontal axis represents the distance along the longitudinal direction of the glass rod 106. The glass rod 106 is extended in accordance with the method having a small diameter variation such as the neck, and after the extension is started, the diameter of the glass rod 106 can be reduced to a target diameter of about 100 mm in the longitudinal distance. In this area, the accuracy of the diameter of the glass rod 106 is extended at a steady state speed by using an exemplary method, which has approximately the same accuracy as that of extending the diameter of the glass rod 106 by the conventional extension method. (Comparative example) A glass rod 106 having a diameter of 65 mm is extended to a diameter of 50 mm. The condition of the moving speed and the amount of gas supplied to the heating source 122 are the same as in the above example. After the extension is started, the glass rod 106 is extended by controlling the moving speed of the tail end support 116 to 8.6 mm / min. This is the speed in steady state. Figure 35 is a graph showing the change in the tension of the glass rod 106 during the early extension phase of the comparative example. The vertical axis represents the tension generated by the glass rod 106, and the horizontal axis represents the moving distance of the heating source 122 after the start of the extension. In the early extension phase, the tension of the glass rod 106 is increased to 300 kgf / cm2, which is three times the steady state tension. This will occur when the heating source 122 moves for the first 100 mm. As shown in Fig. 36, after the extension of the comparative example, the glass rod 106 has a large neck of about 100 mm compared to when it was initially extended. Because the fluctuations continue until about 300 mm longer than the beginning, this area cannot be used as a product, and the yield will decrease. Figure 37 shows the details of the drawing-out process (S158) at the end of Figure 26. 47 This paper size applies the Chinese National Standard (CNS) A4 specification (210 x 297 public love) --------- --- 0 -------- Order --------- line (please read the precautions on the back before filling this page) 548250 A7 SS4ftpifH4Hoc / n〇R_ B7 V. Description of the invention ( π) flowchart. First, the position of the glass rod 106 pulled out by the tail end is detected (S169). Then, the predetermined area (S170) of the glass rod 10 is preheated by the flame of the heating source 122 until the predetermined area is almost softened. Then, the glass rod 106 is extended by heating a predetermined area of the glass rod 106 via the heating source 122 and the moving end support frame 116, so that the diameter of the predetermined area is reduced (S172). The heating source 122 moves from the center of the predetermined area toward the middle surface of the glass rod 106. Next, the heating source 122 heats the glass rod 106 by the flame second (S174). The concentration of this flame is smaller than that of the pre-heated flame (S170). The specified area of the glass rod 106 is further extended by the moving tail support U6, so that the diameter of the specified area is reduced (S176). The prescribed area of the glass rod 106 will then be melted by this flame. Again, the concentration of this flame is less than the concentration of the preheated flame (S170). Fig. 38 shows a schematic view of the cutout 284, which is provided as a mark on the connection between the glass rod 106 and the virtual rod 108. This allows the tail-end pulled-out position detection process (S169) shown in Figure 37 to detect the tail-end pulled-out position. A marker is provided on the connection between the glass rod 106 and the virtual rod 108. The device for recognizing the mark is installed on the second extension device 111 of the glass rod to detect the position of the mark. The starting position of the tail end pull-out process is set according to the detected marker position. The extension process of the glass rod 106 is completed in setting the tail end pull-out start position, and the tail rod pull-out process of the glass rod 106 is started at the same time. When the recognition device is a diameter measurement device, the method shown in Fig. 38 is used. Figure 39 shows the intention of fluorescent paint 287, which is used for the connection between the glass rod 106 and the virtual rod 108. The Chinese national standard (CNS) A4 specification is applied to this paper standard. (210 X 297 public love) (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs * ϋ ϋ ϋ ϋ HI ϋ I ϋ ϋ ϋ H ϋ ϋ ϋ ϋ ϋ H ϋ A7 548250 doc / 008 B / V. Description of the invention) as another example of marking. When the cognitive marker device is an image processing device, the method shown in Fig. 39 is used. Fig. 40 shows a schematic diagram of the second extension device 111 of the glass rod for detecting the cutout 284 during the tail end pull-out position detection process (S169). First, the virtual rod 108 was mis-connected to both ends of the glass year 106. A glass rod 106 having a virtual rod 108 on both ends is fixed to the fixed clip 118 and the movable clip 119, not shown in the figure. A 3mm deep incision 284 is provided to surround this joint position. This coupling position is caused by the connection between the glass rod 106 and the virtual rod 108. During the extension of the glass rod 106, the diameter measuring device 124 measures the diameter of the glass rod 106. When the diameter measuring device 124 measures the position of the cutout 284 by detecting the change in the diameter of the glass rod 106, the second extension device 111 of the glass rod starts the tail-end drawing process. The starting position of the tail end pull-out is slightly toward the middle of the glass rod 106 connected between the glass rod 106 and the virtual rod 108. Furthermore, there are no bubbles or bubbles having a diameter of 0.3 mm or more at the beginning of the tail end pull-out. Next, the process moves from extended to tail-end pull-out process. When the mark is a mark 287, a fluorescent paint is applied to the connection between the glass rod 106 and the virtual rod 108. The camera of the image processing device can detect the fluorescent paint installed on the position of the diameter measuring device 124, and the diameter measuring device 124 is installed on the moving bracket 120. During the extension of the glass rod 106, the camera processes the pattern of the glass rod 106. If the camera detects the fluorescent paint, the second extension device 111 of the glass rod starts the tail-end drawing process. The starting position of the tail end pull-out is slightly toward the middle of the glass rod 106 connected between the glass rod 106 and the virtual rod 108. Further, there is no bubble or a bubble having a diameter of 0.3 mm or more at the position where the tail end is pulled out at the beginning. Next, the process from Pingguo Utilization Standard (CNSM1 specification (210 x 297 public love f please read the notes on the back before filling out this page) from the paper. 0 Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs and Consumer Cooperatives — — — — --Ϋ ϋ IH ϋ n ϋ I ϋ n III n ϋ I ϋ ϋ ϋ III n II.

A 5 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 548250 ^ ^ d ^ pifH4 Hor / n〇R__B7__ Description of the Invention (Heart) Extending the process to the tail end. FIG. 41 shows the heating source 122 and the rear support platform 116 during the drawing of the tail end of the glass rod 106 during the drawing process shown in FIG. 37 (S169). Mobile illustration. During the pre-heating process with the tail end pulled out (S170), the flame of the heating source 122 heats the prescribed area of the glass rod 106 until the glass rod 106 is almost softened. During the extension with the tail end pulled out (S172), the heating source 122 heats a prescribed area of the glass rod 106, and the tail support base 116 extends the prescribed area of the glass rod 106. This reduces the diameter of the prescribed area. In the second heating process (S174), the tail support base 116 stops, and the heating source 122 moves from the center of the prescribed area toward the middle surface of the area of the glass rod 106 (to the left in the figure). Next, the heating source 122 heats the glass rod 106 with a flame at a concentration lower than that of the preheated flame (S170). During the second extension process with the tail end pulled out (S176), the heating source 122 moves to the left side in the figure and heats the glass rod 106. The tail support 116 is also moved to extend the prescribed area of the glass rod 106. During the melting process with the tail end pulled out (S178), the heating source 122 heats the glass rod 106 with a flame, the concentration of which is lower than that of the preheated flame (S170). The position of the heating source 122 is at the same position as during the second extension process for pulling out the tail end (S176). The tail support table 116 moves to melt the glass rod 106. FIG. 42 shows a setting example of another method of the tail-end drawing out process (S158) in FIG. 37. This method controls the amount of gas, the moving distance of the heating source 122, and the moving speed of the tail support table 116 according to the progress time of the drawing process of the tail end of the glass rod 106. Quantity of gas, moving distance of heating source 122, and original paper size of tail support base 116 剌 Chinese national standard (CNSM4 specification⑵Q X 297 public love) ------------------- -Order · -------- Line (Please read the notes on the back before filling in this page) A7 B7 548250 5 Hoc / 00 ^-5. Description of the invention (Μ) The movement speed is set once. This setting is based on the position of the cutout 284, and the change and extension speed setting of the length and diameter of the glass rod 106 along the axis direction in the second heating condition (S157). The second extension device of the glass rod 111 then resets the amount of gas, the moving distance of the heating source 122, and the moving speed of the tail support table 116 according to the progress time of the drawing process of the tail of the glass rod in the tail drawing process (S158). . For example, in the pre-heating process (S170) with which the tail end is pulled out, it is performed for 300 seconds, and the moving distance of the heating source 122 is set to 0 mm. The moving speed of the tail support 116 is set to 0 mm / min. The amount of hydrogen (H2) used to heat the source 122 was set to 250 cc / min. The amount of oxygen (02) (internal) output from the internal nozzle of the heating source 122 was set to 30 cc / min. The amount of oxygen (02) (external) output from the external nozzle of the heating source 122 was set to 100 cc / min. In accordance with the above situation, the heating source 122 heats the glass rod 106. During the extension with the tail end pulled out (S172), it was performed for 60 seconds, and the amount of hydrogen (H2) used to heat the source 122 was set to 250 cc / min. The amount of oxygen (02) (internal) output from the internal nozzle of the heating source 122 was set to 30 cc / min. The amount of oxygen (02) (external) output from the external nozzle of the heating source 122 was set to 100 cc / min. In accordance with the setting conditions described above, the heating source 122 heats the glass rod 106. The moving distance of the heating source 122 is set to 0 mm, and the tail support base 116 extends the glass rod 106 at a moving speed of 10 mm / min. In the second heating process (S174), it was performed for 20 seconds, and the moving speed of the tail support table 116 was set to 0 mm / min. The moving distance of the heating source 122 is set to 15 mm. The amount of hydrogen (¾) used to heat the source m was set to 130 cc / min. The amount of oxygen (02) (internal) output from the internal nozzle of the heating source 122 was set to 15 cc / min. The amount of oxygen (〇2) (outside) output from the external nozzle of the heating source 122 (please read the precautions on the back before filling this page) 0 -------- Order -------- -Line "Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs

A, 548250 S S4 ^ pifH4 doc / 0Q8 ___ B7______________ 5. Description of the invention) Set to 50cc / min. According to the above setting conditions, the heating source 122 heats the glass rod 106 °. During the second extension process (S176) for pulling out the tail end, it is performed for 180 seconds, and the moving distance of the heating source 122 is increased from 15mm to 25mm. The amount of hydrogen (H2) used to heat the source 122 was set to 130 cc / min. The amount of oxygen (02) (internal) output from the internal nozzle of the heating source 122 was set to 15 cc / min. The amount of oxygen (02) (external) output from the external nozzle of the heating source 122 was set to 50 cc / min. In accordance with the setting conditions described above, the heating source 122 heats the glass rod 106. The tail support 116 extends the glass rod 106 at a moving speed of 10 mm / min. Finally, during the melting process with the tail end pulled out (S178) for 30 seconds, the heating source 122 does not move from the position during the second extension process with the tail end pulled out, so the moving distance is maintained at 25mm. The amount of hydrogen gas (H2) used to heat the source 122 was set to 130 cc / min. The amount of oxygen (02) (internal) output from the internal nozzle of the heating source 122 was set to 30 cc / min. The amount of oxygen (02) (external) output from the external nozzle of the heating source 122 was set to 20 cc / min. In accordance with the setting conditions described above, the heating source 122 heats the glass rod 106. The tail support 116 melts the glass rod 106 at a moving speed of 120 mm / min. According to the setting situation shown in FIG. 42, the glass rod 106 having a diameter of 60 mm is pulled out by the tail end through the glass rod second extension device 111. The shape of the preform in the area pulled out by the tail end forms a conical shape. The length and diameter of this area are 61mm and 60mm, respectively. The time required for the tail-end pull-out process is 12 minutes. What is not shown in FIG. 43 is another setting example of another method of the tail end drawing out process (S158) in FIG. 37. This method controls the amount of gas and the movement of the heating source 122 according to the moving distance of the tail support 116. The paper size applies the Chinese national standard (CNSM4 specification (210 X 297 mm) (please read the precautions on the back before filling in this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs-· ϋ ϋ I n ϋ ϋ 1 ° Ji ϋ 1 1--in i an n I nnnn ϋ ϋ II n III ϋ ϋ ϋ ϋ I n ϋ n ϋ. N ϋ 548250 A7 _5546pifd4.d〇r / 00R R7 V. Description of the invention (k) Speed 'and the moving speed of the tail support 116. Glass god --- extension device 111 detects the movement distance of the tail support 116. According to the position of the cutout 284 In the second heating condition, the length and diameter of the glass rod 106 along the axis direction are changed and the extension speed is set (S157). The moving distance of the heating source 122 and the moving speed of the tail support table 116 are set once. The two extension devices 111 reset the amount of gas, the moving distance of the heating source 22, and the moving speed of the tail support base 116 according to the movement distance of the tail support base 116 during the tail end pull-out process (S158). The incident was that the tail support platform 116 could not be measured because the tail support platform 116 did not move. When the glass rod 106 was not sufficiently heated during the tail end drawing process, this may be supported from the tail Occurs due to insufficient power of the table drive motor 275. When the output of the tail support table drive motor 275 is not large enough, an AC servo motor that can detect the torque of the output shaft can be used to drive the tail support table 116. A threshold can be set値 Use the torque generated by the motor 275 at the tail support table. When the torque exceeds this threshold, the second extension of the glass rod 111 can determine that the heat is insufficient. Then, the second extension of the glass rod 111 can stop the tail support. The stage 116 is driven for a period of time, and the amount of gas supplied to the heating source 122 is increased. The setting situation shown in Fig. 43 is the same as the setting situation shown in Fig. 42 except that the "progress time" setting is changed to "tail support stage 1" 16 moving distance "setting. The tail-end drawing method shown in Figure 43 also has a pre-heating process (S170) for tail-end drawing and an extension for tail-end drawing. Process (S172), second heating process (S174), second extension process (S176) for tail-end drawing, and melting process (S178) for tail-end drawing. In each process stage, according to The moving distance of the tail support 116, set the gas quantity and moving distance of the heating source 122, and the movement of the tail support 116. The paper size is applicable to China National Standard (CNS) A4 (210x297). (Please read the precautions on the back first (Fill in this page again.) 0 Order --------- line 丨 printed by the Intellectual Property Bureau of the Ministry of Economic Affairs's Consumer Cooperatives to print 548250 A7 B7. For example, during the pre-heating process for pulling out the tail end (S170) 'Because the moving speed of the tail support platform 116 is set at 0 mm / min, measure after starting the pre-heating process for pulling out the tail end 300 seconds. In other words, the moving distance of the tail support table 116 is set to 0 mm in 300 seconds. The amount of hydrogen gas (H2) used to heat the source 122 was set to 250 cc / min. The amount of oxygen (02) (internal) output from the internal nozzle of the heating source 122 was set to 30 cc / min. The amount of oxygen (02) (external) output from the external nozzle of the heating source 122 was set to 100 cc / min. In accordance with the above situation, the heating source 122 heats the glass rod 106. When the preheating process with the tail end pulled out has elapsed 300 seconds, the process moves to the next step. During the extension with the tail end pulled out (S172), when the moving distance is changed from Omm to 30mm, the amount of hydrogen (H2) used to heat the source 122 is set to 250cc / min. The amount of oxygen (02) (internal) output from the internal nozzle of the heating source 122 was set to 30 cc / min. The amount of oxygen (02) (external) output from the external nozzle of the heating source 122 was set to 100 cc / min. In accordance with the setting conditions described above, the heating source 122 heats the glass rod 106. The moving distance of the heating source 122 is set to 0 mm, and the tail support base 116 extends the glass rod 106 at a moving speed of 10 mm / min. During the second heating process (S174), the moving speed of the tail support base 116 is set to 0 mm / min, so that the movement distance of the tail support base 116 is maintained at 30 mm. The moving distance of the heating source 122 is set to 15 mm. The amount of hydrogen (H2) used to heat the source 122 was set to 130 cc / min. The amount of oxygen (02) (internal) output from the internal nozzle of the heating source 122 was set to 15 cc / min. The amount of oxygen (02) (external) output from the external nozzle of the heating source 122 was set to 50 cc / min. In accordance with the setting conditions described above, the heating source 122 heats the glass rod 106. After the heating source 122 moves 15 mm, the process moves to the next step. This paper size is in accordance with China National Standard (CNS) A4 (21〇χ 297 public reply) (Please read the precautions on the back before filling out this page) • I. One 0, · I ^ 1 ϋ ϋ nn II n i_i n 1 · ϋ I ϋ l_i-^ 1 ϋ ϋ ϋ ϋ ϋ ϋ B7 B7 Printed by the Consumer Cooperative of the Ministry of Economic Affairs and Intellectual Property, 548250 -5__46nifH4.doc / 0Q8 V. Description of the invention During the extension (S176) 'When the movement distance of the cymbal beta supporter 116 is increased from 30mm to 55mm', the movement distance of the heating source 122 is increased from 15mm to 25mm. The amount of hydrogen gas (H2) used to heat the source 122 was set to 130 cc / min. The amount of oxygen (02) (internal) output from the internal nozzle of the heating source 122 was set to 15 cc / min. The amount of oxygen (02) (external) output from the external nozzle of the heating source 122 was set to 50 cc / min. In accordance with the setting conditions described above, the heating source 122 heats the glass rod 106. The tail support 116 extends the glass rod 106 at a moving speed of 10 mm / min. Finally, in the melting process for pulling out the tail end (S178), when the moving distance of the tail supporter 116 is increased from 55mm to 100mm, the heating source 122 will not be extended from the second extending process for pulling out the tail end. The position of middle (S176) moves. Therefore, the moving distance is maintained at 25 mm. The amount of hydrogen (H2) used to heat the source 122 was set to 130 cc / min. The amount of oxygen (02) (internal) output from the internal nozzle of the heating source 122 was set to 30 cc / min. The amount of oxygen (02) (external) output from the external nozzle of the heating source 122 was set to 20 cc / min. In accordance with the setting conditions described above, the heating source 122 heats the glass rod 106. The tail support 116 melts the glass rod 106 at a moving speed of 120 mm / min. (Example 1) According to the setting shown in Fig. 43, a glass rod 106 having a diameter of 60 mm is pulled out at the tail end. A 200W AC servo motor was used as the tail support table drive motor 275. It is used as a rotary encoder for the tail support table drive encoder 273, which can detect the number of rotations of the tail support table drive motor 275. The rotation speed of the tail support motor 275 is controlled by the output of the tail support motor encoder 273. The movement distance of the tail support 116 can be obtained by measuring the output of the tail support driving encoder 273. 5 5 (Please read the notes on the back before filling out this page) -------- Order · -------- * ^ L · Intellectual Property Bureau, Ministry of Economic Affairs Printed by the Employee Consumer Cooperative 548250 to 46 pifd4.dnr / rmx 5. Description of the Invention (θ) Time is 15 minutes. The shape of the area of the ongoing glass rod 106 pulled out by the tail end forms a conical shape. The length and diameter of this area are 61mm and 60mm, respectively. (Example 2) According to the setting shown in Fig. 43, a glass rod 106 with a diameter of 60mm is pulled out at the tail end. The linear encoder provided on the tail support 116 can detect the moving distance of the tail support 116. Based on the moving distance of the tail support platform 116 detected by the linear encoder, the amount of gas, the movement distance of the heating source 122 and the movement speed of the tail support platform 116 are controlled. The shape of the region of the glass rod 106 being pulled out by the trailing end forms a conical shape. The length and diameter of this area are 65mm and 60mm, respectively. FIG. 44 is a structural diagram of the heating source 122 of the second extension device 111 of the glass rod. The bottom end of the outer tube 285 of the heating source 122 is closed. The outer tube 285 is connected to a flammable gas passage 312. This is a hydrogen channel where hydrogen is an example of a suitable flammable gas. The heating source 122 has a flammable gas flow rate control unit 314 and is placed in the flammable gas passage 312. All inner tubes 286 are connected to an oxygen channel 308 through a branching tool 316. The oxygen channel 308 is used as a channel for oxygen. The inert gas passage 296 is connected to the oxygen passage 308 via a connection element 302. The oxygen flow rate control unit 310 is installed between the connection element 302 and the inlet of the oxygen passage 308. The inert gas passage 296 has a valve 300 and an inert gas flow rate control unit 298. The heating source I22 has a control element 304 for controlling the driving source 306 based on the flow rate data output from the oxygen flow rate control unit 310. The driving source 306 is connected to the valve 300. The flammable gas flow rate control unit 314 and the oxygen flow rate control unit 310 control the flow of hydrogen H2 and oxygen 02 as shown in Figs. 42 and 43. The paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297). Public reply) (Please read the notes on the back before filling out this page) Mine Order --------- Line 丨 41 ^ ---------- Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs System 548250 A7 5 ^ 46nifd4.doc / Q08 _B7 V. Description of the invention (0) rate. A valve such as an electronic valve or a solenoid valve may be used as the valve 300. A three-way tube or three-way valve may be used to connect the element 302. FIG. 45 is a plan view of the top of the heating source 122. Each inner tube 286 has an inner diameter of 1 mm and an outer diameter of 3 mm, and is inserted into an outer tube 285 having an inner diameter of 30 mm. The inner tube 286 surrounds the center of the outer tube 285 and is placed in a plurality of columns in the same circle. The inner tubes 286 are placed in each column at regular intervals. Adjacent columns are directed outward from the tube 285 to become the distance between the highest inner tubes 286 in each column. The inner tube 286 may be installed inside the outer tube 285 at a uniform density. Oxygen flows inside the oxygen outlet 288, which is inside the inner tube 286. Flammable gas flows inside the flammable gas outlet 290, which is inside the outer tube 285. The movement of the heating source 122 will be explained as follows. Hydrogen flows from a hydrogen supply source (not shown) into the outer tube 285 through the flammable gas passage 312. Oxygen is distributed into the inner tube 286 via the branch tool 316. Oxygen is supplied through an oxygen channel 308 from an oxygen supply source (not shown). Hydrogen and oxygen are mixed on top of the outer tube 285. A flame 294 is obtained by burning this mixed gas. According to the processing purpose of the glass rod 106, the amount of hydrogen and oxygen can be adjusted by using the oxygen flow rate control unit 310 and the flammable gas flow rate control unit 314 to obtain the optimal flame condition. At the same time, the signal indicates the flow rate of oxygen output from the oxygen flow rate control unit 310 to the control element 304. The linear velocity of oxygen is a few milliseconds, which can be guided by dividing the internal area of the inner tube 286 by the flow rate of oxygen. If the linear velocity of oxygen is 1.0 m / s or less, the control element 304 drives the driving source 306 and opens the valve 300. Next, nitrogen is an inert gas, and flows into the oxygen channel 308 at a linear velocity of 0.5 m / s, and is mixed with the oxygen. This paper size applies to China National Standard (CNS) A4 specifications (210 x 297 meals) (Please read the precautions on the back before filling out this page) 0 One-mouth, · ϋ 1 > 1 ϋ n I l I * 1— ^^ 1 i · — ϋ I— In m 1_1 I—. ^ 1 l ^ im ^ 1 · > ϋ I— n mai · > ϋ n ϋ 548250 Factory A / _ 5 546pifd4.doc / 0 08 B7 Economy Printed by the Consumer Cooperative of the Ministry of Intellectual Property Bureau. V. Invention Description (β) When the flow rate of oxygen is changed, if the linear velocity of oxygen reaches 1.1 meters / second, the control element 304 drives the driving source 306 and closes the valve 300. When the flow rate of the flammable gas and oxygen is reduced so that the flame becomes small, the high temperature region near the top gR of the internal flame moves from the top of the heating source 122. This is because the flame 294 diffuses and causes a mixture of inert gas and oxygen. Therefore, the surface temperature of the top portion of the heating source 122 is maintained below 400 ° C, so that the oxidation of the heating source 122 can be prevented. When the heating power needs to be increased, because the combustion temperature drops, if the inert gas is mixed, the valve 300 for flowing inert gas will be closed. At the same time, because the flame 294 is large and lacks an increase in the flow rate of flammable gases and oxygen, the high temperature region of the flame 294 is no longer located on top of the heating source 122. Therefore, the surface temperature of the top of the heating source 122 is maintained below 400 degrees Celsius. By setting the different linear speeds of oxygen when the valve 300 is opened and closed, it is possible to prevent the bounce caused by opening and closing the valve 300. This needs to be set to 1.0m / sec or less and set to 1.1m / sec or more. It is desirable that, with the opening of the valve 300, the inert gas has an inflow volume with a linear velocity between 0.5 m / s and 2 m / s. The linear velocity of the inert gas can be calculated by dividing the internal area of the oxygen outlet 288 of the inner tube 286 by the flow rate of the inert gas. If the linear velocity of the inert gas is 0.5 m / s or less, it is difficult to control the temperature of the top of the heating source 122. On the other hand, if the linear velocity of the inert gas is 2.0 m / s or more, the temperature of the flame is reduced due to incomplete combustion of hydrogen. If a heating source 122 is used to heat the glass rod 106 with flame 294, metal oxides will generally not be generated on top of the heating source 122. This is because the surface temperature on the top of the heating source 122 is maintained at 400 degrees Celsius or lower, so metal oxides are not attached to the glass rod 106, and can be 58 (Please read the precautions on the back before filling this page )

-lSJ · 1 ϋ ϋ ϋ 1§ I n — ^ 1 l_i nn ϋ ϋ III ϋ ϋ ϋ ϋ I ^ ^ 1 nn This paper size applies to China National Standards (CNS) A4 (210 X 297 male®) Ministry of Economy Printed by the Consumer Property Cooperative of the Intellectual Property Bureau 548250 A7 ^ ^ 46pifri4 dnr / 008_B7 V. Description of the invention Manufacture of high-quality glass rod 106. A glass rod 106 having an average diameter of 65 mm is extended by the second extension device Π1 of the glass rod, wherein the second extension device 111 of the glass rod has a heating source 122 for controlling the flow rate of the inert gas. The ratio of the number of the glass rods 106 having an external substance such as a metal oxide to the entire number of the processed glass rods 106 was 0.2%. In comparison, when the glass rod 106 is always extended via the shut-off valve 300, the ratio of the number of glass rods 106 having foreign substances such as metal oxides to the total number of processed glass rods 106 becomes a high number. Fig. 46 is a graph showing the relationship between the linear velocity of oxygen and the top temperature of the heating source 122. The events shown here are always mixing oxygen and nitrogen with a linear velocity of 0.5 m / s, and not mixing oxygen and nitrogen. When nitrogen is mixed, the top temperature of the heating source 122 does not exceed 400 degrees Celsius. When nitrogen is not mixed, the temperature in this region reaches 400 ° C to 700 ° C, where the linear velocity of oxygen is lm / s or less. Therefore, when the linear velocity of oxygen is lm / sec or more, the surface temperature of the heating source 122 can be controlled by mixing oxygen and nitrogen. Fig. 47 shows the shape of the tip of the preform 107, the diameter of which is reduced and melted during the tail-end drawing-out process (S158). D represents the diameter of the preform 107. 〇 represents the position where the diameter of the preform 107 starts to be reduced. P represents a position where the diameter D of the preform 107 is reduced to 1% or below the original diameter. The preform 107 has a tapered shape, and its both ends can be represented by the equation i / 3D'l'3 '. Here, L represents a length between the position 0 and the position P. The pull-out time to reach the steady state is the time from when the preform 107 is set on the preform pull-out device 500 until the diameter and the pull-out speed of the optical fiber reach a predetermined range. When the preform 107 is pulled out to an optical fiber, the original size of the preform 107 is 9 9 Chinese paper standard iTcNS) A4 ^ i ^ 210 x 297 public love) --- (Please read the precautions on the back before (Fill in this page) -I Aw -------- Order --------- Line 丨 ▲ A7 548250 ^ S4 ^ pifH4 Hnr / OOR _B7_ V. Description of the invention UO) (Please read the back page first) Please fill in this page again.) Shape affects the time it takes to reach the stable state. This effect becomes larger, as the diameter of the preform 107 becomes larger. Then, it takes longer to pull out to reach a stable state. The preform 107 having the shape of the equation 1 / 3D $ LS3D can reduce the time taken for drawing to a stable state. If L < 1 / 3D, because the dripping time of the tip of the preform 107 becomes longer, the time taken for the diameter of the optical fiber and the pull-out speed to reach a predetermined value increases. If L > 1 / 3D, the dripping time at the tip of the preform 107 can be reduced, but it takes longer for the tapered shape of the preform 107 to become a drawn-out stable shape. Then, it takes longer for the diameter of the optical fiber and the drawing speed to reach a predetermined threshold. Therefore, it is preferable that the tapered shape of the preform 107 is L = D. In the case where a part of the preform 107 is heated by flame to melt the preform 107, the remaining deformation is maintained at both ends of the tapered portion of the preform 107. If the remaining deformation of the tapered portion is large here, when a strong impact force is supplied to the preform 107, cracks may be generated on both ends of the preform 107. A thermal impact between the preform 107 and the virtual rod through the jointed preform 107 can also cause cracks on both ends of the preform 107. The amount of deformation on both ends of the preform 107 is preferably 40 kgf / cm2 or less. By controlling the remaining deformation amount of the preform 107 to be 40 kgf / cm2 or less, cracking of the preform 107 can be prevented. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs (Example) A preform 107 with a diameter of 30 mm is pulled out. The length L is set to 30 mm. The deformation amount of the gradually deformed part of the preform 107 is maintained at 40 kgf / cm2 'so that no cracking occurs during the connection between the preform 107 and the virtual rod. When the set diameter of the optical fiber is 100 mm / min and the pull-out speed is 100 mm / min, it takes 20 minutes to reach the stable state. From 60 pieces of prefabricated paper to the Chinese national standard specifications (210 X 297 issued) --—— Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 548250 Factory A / SS46nifH4 Hnr / ODX B7 V. Description of the invention (β) The time from the setting of the preform 107 on the discharge device 500 to the tip of the preform 107 is 10 minutes. It takes 10 minutes for the diameter of the optical fiber and the pull-out speed to reach a predetermined threshold. (Comparative Example 1) A preform 107 having a diameter of 30 mm was pulled out. The length L is set to 5 mm. The deformation amount of the gradually deformed part of the preform 107 is kept at 40 kgf / cm2, so that no cracking occurs during the connection between the preform 107 and the virtual rod. When the set diameter of the optical fiber is 125 / zm and the pull-out speed is 100 mm / min, the time taken for drawing to reach a stable state is 50 minutes. The time from the setting of the preform 107 on the preform pull-out device 500 to the dripping of the tip of the preform 107 is 20 minutes. It takes 30 minutes for the diameter of the optical fiber and the pull-out speed to reach a predetermined threshold. (Comparative Example 2) A preform 107 having a diameter of 30 mm was pulled out. The length L is set to 100 mm. The deformation amount of the gradually deformed part of the preform 107 is kept at 40 kgf / cm2, so that no cracking occurs during the connection between the preform 107 and the virtual rod. When the set diameter of the fiber is 125 # m and the pull-out speed is 100mm / min, the time it takes to pull out to reach a stable state is 40 minutes. The time from the setting of the preform 107 on the preform pull-out device 500 to the tip of the preform 107 is 10 minutes. It takes 30 minutes for the diameter of the optical fiber and the pull-out speed to reach the specified threshold. (Comparative Example 3) A preform 107 having a diameter of 30 mm was pulled out. The length L is set to 30 mm. Keep the amount of deformation of the gradually deformed part of the preform 107 at 60 kgf / cm2. Because cracks may occur during the connection between the prefabricated part 107 and the virtual rod. The paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling this page)

'Aw -------- Order --------- line L Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 548250 Α7 S S46pifH4 doc / Q08 B7 5. Explanation of the invention (β) The preform 107 cannot be pulled out. As described above, by making the tip shape of the preform 107 to 1 / 3DSLS 3D, the time required to pull out the preform 107 to an optical fiber can be reduced. Fig. 48 shows another shape of the tip of the preform 107, the end of which is extended. The preform 107 as shown in Fig. 48 forms a melting portion 332 at one end thereof through a flame, and a mechanically-cut cutting surface 334 at the other end. The melting portion 332 shown in FIG. 48 (a) is rapidly melted by the flame. The melting portion 332 shown in Fig. 48 (b) is gradually melted, and the tapered portion 336 is formed by reducing the diameter. A thin portion 338 is provided on the tip of the melting portion 332 as shown in Fig. 48 (c). When the preform 107 having the tapered portion 336 is pulled out as shown in FIG. 48 (b), since the diameter of the melting portion 332 is small, it takes a short time to drip the tip of the preform 107, and the preform The number of 107 drops is also small. When the preform 107 having the tapered portion 336 and the thin portion 338 is pulled out as shown in FIG. 48 (a), the time taken to drip the tip of the preform 107 can be reduced to that required for the conventional shape of the preform 107 1/3 or less time. The loss of material caused by dripping through the preform 107 can be limited to a small amount of thin portion 338. It is desirable that the shape of the thin portion 338 accounts for 0.1% to 15% of the weight of the melting portion 332. If the weight of the thin portion 338 is less than 0.1% of the weight of the melting portion 332, the effect produced by providing the thin portion 338 cannot be obtained. On the other hand, if the weight of the thin portion 338 is greater than 15% of the weight of the melted portion 332 ', it takes longer to drip the tip of the preform 107, and the loss of the preform 107 increases during drawing. What I want is that the diameter of the thin part 338 is between the main body of the preform 107 and the straight 62. The paper size is applicable to China (CNS) A4 x 297 meals. (Please read the precautions on the back before filling this page) — Aw -------- Order ----- ----- Line 丨 -------------------- 548250 A7 __S 546pif (U.cioc / 008_ B7 V. Description of the invention (B >) 1/2 to 1/10 of the diameter. If the diameter of the thin part 338 is within this range, the time required for the tip of the preform 107 to drip in the early stage of drawing may be It is shortened. The length of the thin female mouth part 338 is about 1 to 5 times this diameter, so the loss of the prefabricated part can be limited to a small amount. Figure 49 depicts τκ in the surface treatment process in Figure 26 (S168 Before the surface treatment of the preform 107 in), the damage map of the preform 107. The preform 107 extended by the second extension device 111 of the glass rod will be subjected to hydrofluoric acid etching as a surface treatment. This chemical cutting The metal cladding of the preform 107 'causes the preform 107 to have the thickness of the central portion of the metal coating in a specified proportion. The hydrofluoric acid etching process breaks down the binding force between silicon and oxygen in the glass The hydrofluoric acid etching process chemically cuts the surface of the preform 107 at a rate of about 8 mm per hour. However, if there are cracks or concaves on the surface of the preform 107, the places with cracks or concaves will be additionally cut And form a larger concave surface than the concave surface on the other part of the preform 107. The concave surface caused by the hydrofluoric acid etching process is called a hydrogen fluoride concave surface. During the drawing of the preform 107 into an optical fiber, this The concave surface of hydrogen fluoride is the cause of fiber splitting. The honing process is performed before the treatment of hydrofluoric acid etching to remove the cracks and concave surfaces on the preform 107, and a preform without a hydrogen fluoride concave surface on the surface can be obtained 107 This method is to flame hob the preform 107 at the temperature of the deformation point of the above-mentioned preform 107. During the flame honing, the preform 107 is honed by the flame, so that its uneven surface will be in the range of 0.3mm Inside. Flame honing the preform 107 before the preform 107 is etched with a hydrofluoric acid to prevent the generation of a concave surface of hydrogen fluoride. This is possible because the amount of deformation in the preform 107 can be reduced, and This paper size applies to China National Standard (CNS) A4 specification (210x297 public love) (Please read the precautions on the back before filling this page) -1AW -------- Order -------- -Line L. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, printed A7 B7 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, printed by farmers 548250

Hnr / OOR V. Invention Description U 丨) A smooth surface without cracks can be obtained. Not only is flame honing suitable, but mechanical honing can also be used to hoist the preform 107. Fig. 51 shows the number of hydrogen fluoride concaves generated on the preform 107 of the counting example and the comparative example by visual inspection. FIG. 52 shows the uneven surface of the preform 107 after the hydrofluoric acid etching treatment of the example and the comparative example. First, the preform 107a and another preform 107b are placed on a supporting table, wherein the preform 107b has the same shape as the preform 107a. Next, one end of the preform 107a was lifted to a height of 10 cm, while the other end was maintained on a supporting table. Then, the preform 107a whose one end is lifted is lowered to the preform 107b so that the preform 107a has a crack. Each of the plurality of preforms 107a was damaged in 3 places at a distance of 20 cm by the same method as described above. In the pretreatment process 2 shown in Figs. 51 and 52, the 'preform 107a' is lifted to a height of 20 cm, and another damage procedure of the preform 107a is the same as that of the pretreatment process 1. In the examples shown in Figs. 51 and 52, each preform 107a is processed through a pretreatment process 1 and a pretreatment process 2. Next, each preform 107a was honed with a burner flame, wherein the burner was supplied with 250 ml / min of hydrogen and 145 ml / min of oxygen. Each flame-honed preform 107a was treated with hydrofluoric acid etching at room temperature. The thickness of the material etched from the outer diameter of the preform 107 is one of four steps of 0.2mm, 1.2mm, 2.2mm, and 3.2mm. The etching thickness of each four steps is etched into 10 pieces of prefabricated parts 10a through hydrofluoric acid. Figure 50 shows a schematic diagram of the prefabricated parts i07a, which are etched by hydrogen acid in Figs. 51 and 52. Processing of the example. By measuring the diameter difference between the marked point X and the marked point diameter, the pre-made 仵 1G7ae can be obtained (Fill in this page)

548250

rlnr / OOS Λ7 B7 Fifth, Ming Mingming instructions) uneven surface. The marked point X is the ground which is damaged by contacting the preform 107b. The marked point S is a point away from the marked point X 10mm, which will not be damaged by contacting the preform 107b. The average diameter of the diameters of the three marked points X was used as the diameter of each of the preforms 107a. In the comparative example shown in Fig. 51 and Fig. 52, each of the preforms 107 is processed through the pretreatment process 1 and the pretreatment process 2 is etched with a hydrofluoric acid without flame honing. The number of concave surfaces of hydrogen fluoride was evaluated by visual inspection, and the uneven surface was measured by the same method as the example. As shown in FIGS. 52 and 53, the uneven surface of the pretreatment process 2 is larger than the uneven surface of the pretreatment process 1. This is because in the damage process, pretreatment process 2 is lifted higher than pretreatment process 1. In addition, the number of hydrogen fluoride concaves generated by the hydrofluoric acid etching through the pretreatment process 2 is larger than the number of hydrogen fluoride concaves in the pretreatment process 1. The larger the amount of etching, the larger the uneven surface of the preform 107. In addition, the larger the etching amount, the larger the number of hydrogen fluoride concave surfaces generated by the hydrofluoric acid etching. The uneven surface of the preform 107a in the flame honing example is lower than the uneven surface of the preform 107a in the comparative example not being flame honed. The number of hydrogen fluoride concaves generated in the example is smaller than the number of hydrogen fluoride concaves generated in the comparative example, as shown in FIG. Therefore, before the preform 107a is etched with hydrofluoric acid, the number of the hydrogen fluoride concave surfaces in the preform 107a and the uneven surface of the preform 107 can be reduced by flame honing the preform 107a. FIG. 53 illustrates another shape of the surface-treated preform 107. The preform 107 has a handle 340. The handle 340 is made of silica glass, which is connected to the surface by women's clothing as shown in Figure 48 (c) through mechanical processing or mechanical processing. The paper dimensions are in accordance with Chinese National Standard (CNS) A4 (210 X 297 Public Love) (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs

-· I ϋ nnn ϋ ϋ 口, ϋ 1 · i ^ i ϋ n II n ϋ I nn · ϋ ϋ nnn ϋ ϋ I ϋ i I A7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 548250 ^ S4iSpifd4 __B7_ V, No. Be sure to specify the cutting surface 334 of the preform 107 treated by UA). When the preform 107 is pulled out into an optical fiber, the preform 107 having the handle 340 can be immediately mounted on the preform pull-out device 500. The diameter of the handle 340 mounted on the cutting surface 334 may be smaller than the diameter of the preform 107, as shown in Fig. 53 (b). FIG. 54 is a schematic diagram of an ultrasonic washing device 404 for washing a heating source. The ultrasonic washing device 404 includes an ultrasonic oscillator 396. A cleaning solution 398 is contained inside the ultrasonic cleaning device 404. Rinse solution 398 contains 10% hydrofluoric acid and 3% nitric acid. Hydrofluoric acid is used to dissolve metal oxides generated on the surfaces of the outer tube 285 and the inner tube 286 of the heating source 122. If the outer tube 285 and the inner tube 286 are made of stainless steel, oxidation on the surfaces of the outer tube 285 and the inner tube 286 will not easily occur. This is because iron, chromium, and nickel are contained in the stainless steel, and a non-chemical film is formed on the surface of the stainless steel to prevent the influence of nitric acid, thereby protecting the surface. The rinse solution 398 may include a soluble organic solvent. Examples of soluble organic solvents are alcohol, acetonitrile, and tetrahydrofuran. The heating source 122 has a plurality of inner tubes 286 having an inner diameter of 1 mm and an outer diameter of 3 mm. The inner tube 286 is located inside the outer tube 285, and the outer tube 285 has an inner diameter of 30 mm. Hydrogen flows into the outer tube 285, and oxygen flows into the inner tube 286. The outer pipe 285 is connected to a hydrogen inlet pipe 392, and all the inner pipes 286 are connected to an oxygen inlet pipe 394. When the glass rod 106 is heated by the flame of the heating source 122, the temperature on the top of the heating source I22 will increase to a high temperature between 400 ° C and 700 ° C. Therefore, a metal oxide will be generated on the top surface of the heating source 122. If the heating source is used for a long time, the metal oxide will gradually be removed and become free-flowing dust particles. 66 This paper size applies to Chinese National Standards (CNS) / U specifications ⑵G X 297 public reply) '(Please read the precautions on the back before filling this page)

548250 Λ7 s S4 ^ pjfH4 dor / OOR_ B7 'Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. Printed on the 5th invention.) Metal oxide dust particles or external factors such as glass dust particles attached to the heating source 122 can be used on glass rod It was removed during the heat treatment of 106. These dust particles can be attached to the surface of the glass rod 106, so the surface layer of the glass rod 106 needs to be honed. If the glass rod 106 is honed, the ratio of the coating of the glass rod 106 to the diameter of the center portion will change. As a result, the optical transmission characteristics of the optical fiber manufactured from the glass rod 106 will deteriorate. Therefore, by washing the heating source 122, external factors can be removed from the heating source 122 and metal oxides added to the heating source 122. In order to use the ultrasonic washing device 404 to wash the heating source 122, first, the hydrogen inlet pipe 392 and the oxygen inlet pipe 394 are opened to the outside. Next, the flame nozzle 390 is lowered directly, and the heating source 122 is immersed in the washing liquid 398. Any air remaining in the outer pipe 285 and the inner pipe 286 is released through the hydrogen gas inlet pipe 392 and the oxygen gas inlet pipe 394. Subsequently, the outer tube 285 and the inner tube 286 are immersed and immersed in the lotion 398 to the top of the water surface. Next, the ultrasonic washing device 404 uses the ultrasonic oscillator 396 to oscillate the ultrasonic waves to wash the heating source 122. The ultrasonic vibration frequency is 10kHz to 100kHz. The heating source 122 is washed by the ultrasonic washing device 404. Metal oxides are present around the stainless steel flame nozzle 390 of the heating source 122 used to heat the glass rod. The area around the flame nozzle 390 of the heating source 122 is immersed in a tritium lotion 398. The ultrasonic oscillator 396 having an output of 500 W cleans the heating source 122 with an ultrasonic vibration of a vibration frequency of 10 kHz to 100 kHz for 30 minutes. Next, the heating source 122 is removed from the ultrasonic washing device 404, and any washing liquid 398 remaining on the surface of the heating source 122 is washed with pure water. The heat source 122 is then dried. Check the top of the outer tube 285 and the inner tube 286, and the outer tube 285 and the inner tube (please read the precautions on the back before filling this page). ----- This paper size is in accordance with Chinese National Standards (CNs) A4 (210 X 297 mm) A7 B7 548250 S ^ 46pifH4 Hoc / 008 V. Examination Note (C) Metal oxidation will not be found in tube 286 Physical and external factors. The surface of the glass rod 106 is heat-treated by the rinsed heating source 122. The ratio of the number of the glass rods 106 contaminated with external factors to the total number of the treated glass rods 106 was 6%. The surface of the glass rod 106 was heat-treated by a non-washed heating source 122 for comparison. In this case, the ratio of the number of glass rods 106 having an external factor contamination to the total number of the glass rods 106 that have been heat-treated is 15%. This ratio is larger than the ratio obtained through the heating source 122 which has been washed. As described above, the metal oxide generated on the top of the heating source 122 and the contamination by external factors can be removed by cleaning the heating source 122 via the ultrasonic cleaning device 404. The glass rod 106 is heated by the heating source 122 washed by the ultrasonic washing device 404, and a high-quality preform 107 can be obtained because less external factors are attached to the glass rod 106. Fig. 55 is a structural diagram of a preform pulling device 500 for pulling out the preform 107 into an optical fiber. The preform pull-out device 500 includes a clip 346 to support the virtual rod 342 to be coupled to the preform 107, a heating device 348 to heat the preform 107, and a movable support frame 344 to supply the preform 107. To the heating device 348; a diameter measuring device 352 is used to measure the diameter of the optical fiber 350 drawn from the preform 107; a first coating device 354 is used to perform the first coating process of the optical fiber 350; a first A correction device 356 is used to correct the first coated optical fiber through an ultraviolet light; a second coating device is used to apply the optical fiber 35 to the second time; a second correction device 360 is used to correct this through an ultraviolet light. A second coated optical fiber; and a traction machine 362 for winding the optical fiber 350 ° in order to use the preform extraction device 500 to pull out the preform 107 into an optical fiber (please read the precautions on the back before filling this page); · Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs: eJ · m ϋ I ttm— III nn ϋ ii ^ i 1 · m I— I ϋ i in ϋ I in an n ϋ u 68 548250

^ S46pifH4 Hor / OOR A7 B7 V. No. of the instructions) 350, first, the virtual rod 342 is connected to the prefabricated part 107 supported by the clip 346 of the movable support frame 344. The start of the preform 107 is then set to a prescribed position of the heating device 3 ', and the preform 107 is then heated. When the tip of the preform 107 softens and drips, the tip of the dripping preform 107 is grasped and pulled out through the diameter measuring device 352. When the diameter of the optical fiber 350 reaches a desired diameter, the optical fiber 350 passes through the first coating device 354 and is first coated with resin. This first coated optical fiber 350 is then corrected through a first correction device 356. The optical fiber 350 is then second-coated via the second coating device 358 and rectified via the second correction device 356. When the pull-out diameter and speed of the optical fiber 350 reach a predetermined threshold, the optical fiber 350 will be wound onto a bobbin through the traction machine 362, which is not shown in the figure. It is first pulled out through the glass base material as described above. The device 900 and the second extension device 111 of the glass rod can manufacture a high-quality prefabricated part 107 with a small variation diameter. Therefore, through the first pull-out device 900 of glass base material and the second extension device 111 of glass rod, and the pull-out preform 107 using the preform pull-out device 500, high-quality and small-diameter fiber optic fibers can be manufactured. Printed by the Consumers ’Cooperative of the Ministry of Economic Affairs of the Ministry of Economic Affairs (please read the notes on the back before filling this page). Although the present invention has been disclosed in the preferred embodiment as above, it is not intended to limit the present invention. Anyone skilled in this art, Various changes and modifications can be made without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope of the attached patent application. 297 mm) 69

Claims (1)

548250 5546pifld4.doc / 013 is the amended version of patent No. 90126006. A8 public version 7 amended version 4, 91% if the 4th day of the month, I would like to ask members to specify the consumption of the staff of the Central Standards Bureau of the Ministry of Economic Affairs mentioned on the 1st day of cl. Cooperatives have printed whether there is any change in the substance of the amendment and whether the amendment is allowed to be amended. Scope of patent application ~ 1. 1. A method for manufacturing an optical fiber, including: providing a glass rod, the glass rod is a parent material of the optical fiber; performing a step of heating and extending the glass rod to produce a preform, wherein When the heating and extending steps are performed, the heating conditions for each position of the glass rod in its axial direction are set based on the average diameter of the diameters of the positions in the axial direction of the glass rod, and the glass rod The elongation speed of the position is set according to the diameter of each position of the glass rod; and the preform is additionally drawn into a thin thread-like shape by additionally heating the preform to generate an optical fiber. 2. A method of manufacturing a preform, the preform being a parent material of an optical fiber, comprising: providing a glass rod, the glass rod being a parent material of the optical fiber; and performing a step of heating and extending the glass rod In order to produce a prefabricated part, during the heating and extending steps, the heating conditions of each position of the glass rod are set according to the average diameter 値 of a plurality of positions in the axial direction of the glass rod, and the The extension speed of each position of the glass rod is set according to the diameter of each position of the glass rod. 3. A manufacturing device for a preform, which is a parent material of an optical fiber, including: a heating source for heating a glass rod, which is a parent material of the preform; an extension unit for extending the Glass rod; 70 ϋ · — ··· ϋΒϋ ϋϋ ϋϋ ϋϋ i-fBH Lnkmet em / Mamm · Βϋϋ · ϋ (Please read the precautions on the back before filling this page) Order-This paper size applies to Chinese national standards (CNS ) 8 specifications (210X297 mm) ABCD Revised date: December 4, 548250 5 546pif 1 d4.doc / 〇1 3 Amends the scope of patent No. 90126006 This VI, please request a scope of patent for a measuring device, Measuring a diameter of a plurality of positions along the axis direction of the glass rod; and a control unit for controlling the extension speed of each position in the axis direction of the glass rod, the extension speed being in accordance with the The diameter of each position in the axis direction of the glass rod measured by the measuring device is set, and the control unit is used to control the heating condition of the heating source at each position in the axis direction of the glass rod. , Plus The condition is set according to the average diameter 値 of the diameters of several positions in the axis direction of the glass rod during heating °--· 1 --- I-1 ih Hi ϋ— ϋ (Please read the precautions on the back before filling (This page), 1T · —Aw. Printed by the Consumers' Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 71 This paper is applicable to the Chinese National Standard (CNS) A4 specification (21〇297297)