KR101659609B1 - Chemical Reinforcement using Heater Assembly of Furnace - Google Patents

Abstract

The present invention relates to an installation structure of a heater in a furnace used for heating a glass plate in a tempered glass manufacturing apparatus, and in the furnace for heating a glass plate mounted on a jig in the tempered glass manufacturing apparatus, Wherein the inner wall of each of the furnaces is partitioned into a plurality of sections so that the inner wall of the furnace can be divided and assembled into a plurality of sections, A support body 420 having a unit assembly form is detachably installed through an assembly metal fitting 424 and one heater 421 is continuously arranged and fixed on the support body 420. [

Description

Technical Field [0001] The present invention relates to a heater installation structure in a furnace used for heating a glass plate in a tempered glass manufacturing apparatus,

[0001] The present invention relates to a heater installation structure in a furnace used for heating a glass plate in a tempered glass manufacturing apparatus, and more particularly, , It is possible to shorten the preheating time while reducing the turnover rate of the furnace due to use in the first and second preheating stages and to reduce the energy consumption so as to stably preheat the heater and to arrange the heaters arranged in the preheating furnace The present invention relates to a structure for installing a heater in a furnace used for heating a glass plate in a tempered glass manufacturing apparatus in which a heater can be replaced and repaired for each compartment.

Generally, tempered glass is widely used as a screen of a display device. In order to manufacture a tempered glass having excellent hardness and strength, a tempering process of glass is required.

Generally, glass strengthening is classified into physical strengthening and chemical strengthening. In general, physical strengthening is performed by heating the glass at a temperature of 550 to 700 ° C. by using glass having a thickness of 5 mm or more, Which is mainly used for tempered glass doors, automobile glasses, and the like.

On the other hand, the chemical strengthening is to strengthen the glass by substituting the potassium ion of the sodium ion and the potassium nitrate solution in the glass by immersing the thin plate glass in the reinforcing furnace containing the potassium nitrate solution at 450 ° C for 3 hours or more, It is used to strengthen thin glass of 2.0mm or less.

Recently, a manufacturing apparatus capable of manufacturing tempered glass through a method of accelerating the ion exchange reaction rate of sodium ions and potassium ions in the glass surface layer by ion exchange of a small amount of molten salt in the melt containing the molten potassium salt Has been proposed.

For example, prior arts such as Korean Registered Patent No. 0659558, Korean Registered Patent No. 0914628, Korean Registered Patent No. 0937225, Korean Registered Patent No. 0966025, and the like, Lt; / RTI >

1 is a perspective view of a tempered glass manufacturing apparatus for chemically tempering glass using such a potassium nitrate solution.

1, a guide rail and a rack gear 11 for transmitting power are provided on both sides of the main frame 1 and parallel to the left and right sides of the main frame 1. The loading robot 2, along with the guide rail 11, The unloading robot 3 sequentially transports the racks 12 in which the plurality of glass substrates are mounted in the horizontal direction to the preheating tank 4, the tempering tank 5, the desiccation tank 6, the hot water tank 7, And a control box 13 for managing the tempered glass manufacturing apparatus as a whole is provided with a reinforced glass manufacturing apparatus for carrying glass reinforced by conveying the water tank 8 and carrying out the rack 12 in which the completed reinforced glass is mounted, .

As described above, the reinforced glass manufacturing apparatus comprises a main frame 1 as a basic frame, guide rails 11 which are parallel to both left and right sides of the main frame 1 so that the robot can move in parallel, A preheating tank 4 for heating the glass first to prevent thermal deformation and cracking during the first heating of the glass, and a preheating tank 4 in which potassium nitrate (KNO ₃ ) is heated and melted to maintain the potassium nitrate in a molten state (6) for gradually cooling the temperature of the tempered glass in the tempering tank (5), a hot water tank (6) for washing the tempered glass cooled in the hot and cold bath (6) (7) and a heat water tank (8).

As described above, in the apparatus for manufacturing tempered glass according to the related art, a plurality of baths are spaced apart from each other in the longitudinal direction, and each of the baths has an internal heating unit having a heater built therein, Most of them were able to accommodate the jig (or rack) on which the disc glass moved on the rails is loaded and unloaded.

In this way, the glass sheets to be reinforced to be conveyed in the strengthening treatment process of the disk glass are stacked on the jig, moved by the loading robot in accordance with the process order, and the jig is moved to the respective sets through the lifting and lowering.

2, the step of preparing tempered glass includes a step S1 of preparing a plate glass, a step S2 of preheating, a step S3 of chemical strengthening, ), And a cooling and washing step (S4).

As described above, the plate glass prepared to prepare the tempered glass is preheated in the preheating furnace, and is chemically strengthened by immersion in potassium nitrate (KNO ₃ ) in the main body (or reinforced furnace) and cooled in the annealing furnace, hot water furnace, And after washing by washing or the like, the strength and hardness are strengthened by the ion exchange reaction while the thickness is thin, so that the tempered glass is obtained.

Conventionally, in the process of preheating a plate glass, a plate glass is heated to a temperature of about 400 ° C. by preheating the plate glass to about 400 ° C. by heating the plate glass in the body (or reinforced furnace) So that damage and breakage of the battery can be prevented.

However, according to the related art, since the preheating is performed by raising the temperature of the plate glass from room temperature to approximately 400 ° C step by step in one preheating furnace, the preheating time is long and the energy consumption is accordingly large. And the final preheating temperature is high, so that the preheating finished plate glass is sent to the main body, and then the rear plate glass is supplied to the preheating furnace to increase the waiting time until the preheating process is performed.

That is, the temperature inside the preheating furnace must be lowered from the final preheating temperature (approximately 400 ° C) to the initial preheating temperature (approximately from room temperature to approximately 100 ° C) in the preparation step for preheating the rear glass plate, The wait time had to be long.

This is because, as the tempered glass is continuously manufactured, the waiting time for the preheating is prolonged, and as a result, the turnability of the preheating glass due to the use of the preheating glass is lowered.

3 is a cross-sectional side view showing the structure of the preheating furnace used in the tempered glass manufacturing apparatus according to the prior art.

3, most of the conventional preheating furnaces 20 are provided with the heat sources required for heating the plate glasses through the heaters 21 and 22, A plurality of pipe type electrothermal heaters 21 and 22 capable of generating heat can be wound up to raise the internal temperature of the preheating furnace 20 step by step.

The heaters 21 and 22 may be all heaters used in an electric furnace or the like. Such heaters are well known in the art and will not be described in detail.

As shown in FIG. 3, the pipe-shaped electrothermal heaters 21 and 22 wound around the sidewall of the preheating furnace 20 are arranged such that when a failure or failure occurs due to the nature of the installation structure, There is a problem that the replacement work is structurally inconvenient and inconvenient. In particular, there is a problem that a replacement work time is required and a replacement cost is accordingly increased.

Korean Registered Patent No. 0659558 (published on Dec. 20, 2006, name: manufacturing apparatus for tempered glass for display windows) Korean Registered Patent No. 0914628 (published on September 2, 2009, name: tempered glass manufacturing apparatus) Korean Registered Patent No. 0937225 (issued on January 15, 2010, name plate glass reinforcement device) Korean Registered Patent No. 0966025 (published on Jun. 26, 2010), a method for manufacturing a tempered glass film for display screen protection and a tempered glass film produced therefrom)

The object of the present invention is to provide a tempered glass manufacturing apparatus in which a preheating furnace is divided into a first furnace and a second furnace in a process of preheating a plate glass for chemical strengthening, In the tempered glass manufacturing apparatus which can reduce the preheating time and reduce the energy consumption and stabilize the preheating by improving the turnover rate of the furnace according to the use of the first and second preheating furnaces, .

It is another object of the present invention to provide a tempered glass manufacturing apparatus which can be replaced and repaired by dividing the heaters disposed in the respective furnaces in accordance with the division of the heaters, And a heater installation structure in the furnace.

According to an aspect of the present invention, there is provided a tempered glass manufacturing apparatus in which a heater is provided on an inner wall of each furnace for heating a glass plate mounted on a jig in a tempered glass manufacturing apparatus, Wherein the inner wall of each furnace is divided into a plurality of zones so that the support body having a unit assembly shape can be detachably attached to the inner wall of the furnace through the assembly metal fittings And a heater installation structure in a furnace used for heating the glass plate in a tempered glass manufacturing apparatus in which one heater is continuously and fixedly arranged by a fixing piece on the support body.

delete

delete

At this time, the support body has a heat insulating property, and a fixing metal for supporting and fixing the heater is inserted therein. The heater is repeatedly mixed with the zigzag pattern and the parallel pattern by one wire on the supporting body, And the bent portions of the heaters adjacent to each other in the process of arranging the heater in parallel with the zigzag shape on the support body are preferably supported and fixed by the fixing pieces fitted to the fixing bracket .

According to the present invention, in the preheating step by raising the temperature of the plate glass mounted on the jig in the preheating furnace step by step from the preheating furnace to the preheating furnace, the preheating furnace is divided into the first preheating furnace and the second preheating furnace In the first preheating furnace, after the first preheating process is completed, the plate glass is transferred to the second preheating furnace to perform the second preheating process, thereby shortening the preheating time while improving the turnover rate of the furnace according to the use of the first and second preheating furnaces And energy consumption can be reduced at the same time, so that stable preheating can be performed.

According to the present invention, when a heater is installed in an inner wall of each furnace in order to heat a plate glass mounted on a jig in a tempered glass manufacturing apparatus, the unit assembly form is divided and partitioned and arranged on the inner surface of each furnace The heater disposed in each furnace is divided and installed in each furnace so that the heater can be replaced and repaired according to each compartment at the time of failure of the heater, And the like can be saved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a tempered glass manufacturing apparatus for manufacturing chemically tempered glass according to the prior art; FIG.
FIG. 2 is a process block diagram showing a schematic process sequence by a conventional tempered glass manufacturing method. FIG.
3 is a side sectional view showing the construction of a preheating furnace used in a tempered glass making apparatus according to the prior art.
4 is a front view showing the arrangement of a tempered glass manufacturing apparatus for producing chemically tempered glass according to the present invention.
Fig. 5 is a plan view of Fig. 4 showing the arrangement of a tempered glass making apparatus for making chemically tempered glass according to the present invention. Fig.
FIG. 6 is a side view of FIG. 4 showing a state in which a jig inside the transfer unit unit is transferred to the upper portion of the primary preheating furnace in the tempered glass manufacturing apparatus according to the present invention. FIG.
FIG. 7 is a sectional view showing a cut-away state of a recess in order to show an internal structure of a primary preheating unit according to the present invention and a heater disposed on an inner circumferential surface of a primary preheating furnace.
8 is an enlarged view of a portion A of FIG. 7 for showing a heater disposed on the inner circumferential surface of the primary preheating furnace according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In order to explain the preferred embodiments of the present invention, the thicknesses of the lines and the sizes of the components shown in the attached drawings may be exaggerated or omitted for clarity and convenience of description, Terms to be given are terms defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator.

4 to 6, the apparatus for manufacturing tempered glass according to the present invention mainly includes transfer unit units 200 and 201, a jig supply unit 300, first and second preheating units 400 and 500, a chemical strengthening unit 600, The first and second cold units 700 and 800, the cleaning unit 900, and the jig discharge unit 301, which are sequentially arranged in a line.

The first and second preheating units 400 and 500, the chemical strengthening unit 600, the first and second cold units 700 and 800, and the cleaner unit 900 are installed in the respective steps A furnace or a bath is disposed in each of the units so as to accommodate the plate glass 110 mounted on the jig 120. [

For example, a furnace disposed in the primary preheater 400 is referred to as a primary preheating furnace 410, a furnace disposed in the chemical strengthening unit 600 is referred to as a tempered furnace, A furnace disposed in the cold portion 700 is referred to as a first cold furnace.

The first and second preheating units 400 and 500, the chemical strengthening unit 600, the first and second cold units 700 and 800 and the cleaning unit 900 are disposed on the first floor of the structure 100, Guide rails 103 are horizontally installed on the two layers of the guide rails 103 so that the box-shaped transfer unit units 200 and 201 opened on the bottom surface along the guide rails 103 are arranged to be opposed to the left and right sides.

As shown in FIGS. 4 to 6, the structure 100 includes a steel frame such as an H-shaped beam with a predetermined interval therebetween and interconnecting upper ends thereof to form a rectangular hexagonal framework 101, 102 (length × width × height; 31 m X 8 m x 10 m).

In this case, one layer of the structure 100 has a height of about 4 m on the ground. As described above, the transfer unit units 200 and 201, the first and second preheating units 400 and 500, the chemical strengthening unit 600, The second cold units 700 and 800, and the cleaning unit 900 can be arranged in the divided sections.

The two layers of the structure 100 have a height of about 6 m. A guide rail 103 is installed at a height of about 7 m above the ground in the two layers of the structure 100 so as to face the longitudinal direction of the skeleton. So that the transfer roller unit 104 of the unit units 200 and 201 can move.

6, the sheet glass units 110 and 200 to be reinforced are connected to the first and second preheating units 400 and 500, the chemical strengthening unit 600, the first and second cold air heating units 200 and 201, 700 and 800 and sequentially transferring the jig 120 to the cleaning unit 900 in a state where the jig 120 for loading the plate glass 110 is placed in a generally rectangular metal material conveyance casing 210, And transports the plate glass 110 to each process part so as to move up and down.

The transfer unit units 200 and 201 include a transfer casing 210, a guide transfer block 220, a jig 230, and an ascending / descending tutu 240 so as to receive and transfer the jig 120.

As shown in FIG. 6, the jig 120 is a part that is inserted into each furnace according to each process and firmly mounts and supports the plate glass 110 to be reinforced without shaking, And has a rectangular parallelepiped frame structure having six sides formed by a plurality of support rods.

The jig 120 can stably mount the plate glass 110 by adjusting the mounting width and the mounting height according to the specifications of the various plate glasses 110 with only one jig 120 regardless of the standard size of the plate glass 110 .

On both sides of the upper plate side of the jig 120, hooking shafts 121 are provided so as to hook the hooks 231 for lifting the jig 120 by the lifting and lowering dogs 240.

The conveyance casing 210 is formed of a generally rectangular metal material and has a lower end opening. The conveyance casing 210 can accommodate the jig 120 on which the plate glass 110 is mounted.

The guide conveying block 220 is positioned at the upper end of the conveying casing 210 and includes a conveying roller portion 104 for conveying the conveying unit portions 200 and 201 to an upper portion of a furnace for each process, As shown in FIG.

As shown in FIG. 6, the jig hook 230 protrudes from both sides of the jig 120 in a state in which the jig hook 230 is disposed inside the feed casing 210, as shown in FIG. 6, And a hook 231 for hooking the hook shaft 121 formed thereon.

The ascending / descending stepping person 240 is a jig ascending and descending device which pulls the jig 120 according to each process and serves to receive or take out the jig 120 in each furnace (for example, the first preheating furnace 410).

The up and down tug inserting unit 240 is fixed to the upper surface of the guide conveying block 220 and is driven by the driving force of the motor 241 to move the jig 120 to the four sides of the jig 120 The jig 120 is lifted up and down in the vertical direction through the bottom opening surface in the transfer casing 210. [

4 and 6, a plurality of glass sheets 110 for tempered glass objects are mounted by the jig 120, and the transfer unit unit (not shown) 200 move along the guide rails 103 and move the jig 120 to each process site for the tempered glass manufacturing process.

5 and 6, the first and second preheating units 400 and 500, the chemical strengthening unit 600, the first and second cold tempering units 600 and 600 are disposed between the first and second layers of the structure 100, Closing means 150 including an opening / closing door 151 which moves along the rail beam 152 so as to selectively open / close each upper opening / closing face of the door 700/800.

The opening and closing means 150 is a device for opening and closing the upper opening face of the furnace in order to accommodate and draw the jig 120 transferred by the transfer unit 200 into a furnace for each process.

The opening and closing means 150 mainly includes a door opening and closing door 151 opened and closed by chain driving by the opening and closing motor 160 (see FIG. 7) and a rail beam 152 supporting and guiding the opening and closing door 151, Descending frame 153 and a cylinder 154 that provides the ascending and descending power of the ascending and descending frame 153. [

The jig 120 moves along the guide rail 103 through the conveyance roller unit 104 of the guide conveyance block 220 and the preheating process which is the first process in the tempered glass manufacturing process The first preheating passage 410 of the primary preheating section 400 is opened to open the opening door 151 to receive the jig 120 .

That is, the cylinder 154 disposed between the ascending / descending frame 153 and the water-holding frame 105 is actuated to push up the ascending / descending frame 153, and then the opening and closing motor 160 of the opening and closing means 150 So that the opening and closing door 151 is slid on both sides of the rail beam 152 to be opened.

When the opening and closing door 151 is opened to open the upper opening surface of the first preheating path 410, the jig 120 housed in the feeding unit 200 is lowered through the lifting and lowering mouthpiece 240, And is placed in the preheating furnace 410 to complete preparation for preheating the plate glass 110 loaded on the jig 120.

When the plate glass 110 is supplied to the first preheating unit 400 through the transfer unit unit 200 and the jig 120 so as to preheat the plate glass as a preparation step for chemical strengthening as described above, The preheating of the plate glass 110 by the heater 421 is performed in the furnace 410.

Although the preheating process of the plate glass according to the present invention is compared with the conventional plate glass preheating process, all of the preheating processes are conventionally performed in a single preheating furnace, but in the present invention, the preheating process of the plate glass 110 Is divided into a first preheating and a second preheating.

4 and 5, the unit for preheating the plate glass 110 includes a first preheating unit 400 and a second preheating unit 500, The preheating units 400 and 500 are respectively disposed with a primary preheating furnace 410 and a secondary preheating furnace (not shown).

Of course, the primary preheating furnace 410 and the secondary preheating furnace (not shown in the figure) disposed in the primary preheating section 400 and the secondary preheating section 500 have the same configuration and structural characteristics.

Therefore, in describing the present invention, the secondary preheating furnace can be fully understood even if the constitution and structural characteristics of the primary preheating furnace 410 are described.

7, the primary preheating furnace 410 disposed in the primary preheating unit 400 according to the present invention has a box-like structure having an open top, A heat insulating material 430 is inserted.

Of course, the upper opening surface of the first preheating furnace 410 is closed by the opening / closing door 151 so as to be openable and closable.

The heater 421 is divided into a plurality of sections on the inner side wall of the primary preheating furnace 410.

Particularly, according to the present invention, when the heater 421 is mounted on the primary preheating furnace 410, the support body 420 supporting the heater 421 is formed to be the inner wall of the primary preheating furnace 410 .

That is, as shown in FIG. 8, the support body 420 has a heat insulating property, and a fixing bracket 422 for supporting and fixing the heater 421 therein is inserted therein.

The support body 420 is formed in the form of a unit assembly which is fitted with the same thickness as the inner wall of the first preheating furnace 410 and is assembled and disassembled through the assembly metal fittings 424 on the inner wall of the first preheating furnace 410 .

That is, the support body 420 can be assembled and disassembled on the inner wall of the first preheating furnace 410 by each partition.

Accordingly, when assembling the primary preheating furnace 410, the total number of the supporting bodies 420 is determined considering the area of the inner wall formed according to the standard of the primary preheating furnace 410, The body 420 is partitioned by dividing the inner wall of the first preheating furnace 410 into a predetermined size.

The heater 421 mounted on the support body 420 through the fixing bracket 422 repeatedly mixes one wire in a zigzag pattern and a parallel pattern as shown in the accompanying drawings, Line structure.

That is, one support body 420 has a structure in which one heater 421 is continuously arranged.

8, in the process of arranging the heater 421 on the support body 420 in a zigzag form and in parallel, the bending portion of the heater 421 adjacent to the upper and lower sides is fitted to the fixing metal 422 And the lid is supported and fixed by the fixing piece 423.

The arrangement of the heater 421 as described above is characterized in that the inside of the first preheating furnace 410 can be uniformly heated because the heat can be evenly dispersed.

Particularly, since a plurality of support bodies 420 are partitioned and assembled into unit assemblies on the inner wall of the first preheating furnace 410 as described above, in this state, any one of the support bodies 420, (Or malfunction) of the heater 421 on the heater 420, only the supporting body 420 having the defective heater 421 is replaced, The replacement time and the replacement cost can be greatly reduced.

According to the present invention, in the first preheating furnace 410, the plate glass 110 is firstly preheated by raising the temperature from room temperature to about 200 ° C in multiple stages.

In such a preheating step, the equilibrium of the temperature of each part of the glass is important. Particularly, when the glass is heated only partially according to the size of the glass plate 110 like a large glass, twinning occurs in the mutual relation between the expansion force and the internal phases of the glass In order to prevent this, it is necessary to rapidly heat up to a certain temperature, maintain the temperature at a certain temperature, and increase the temperature step by step while repeating the temperature increase and the constant temperature.

Specifically, the preheating temperature in the first preheating furnace 410 starts at room temperature, and the multi-stage heating is performed three times in stages up to approximately 200 ° C according to the thickness, shape, and size of the glass.

At this time, the rise in temperature should not exceed 60 ° C, and sufficient time is required to equilibrate the temperature. As described above, by increasing the preheating temperature while repeating the temperature elevation and the constant temperature, the temperature of the entire glass portion can be uniformly maintained, so that breakage of the glass can be prevented.

The preheating temperature and time are slightly different depending on the thickness of the plate glass 110, but the preheating treatment is generally performed for about 15 minutes.

When the first preheating in the first preheating furnace 410 is completed, the jig 120 having the first preheated glass plate 110 loaded thereon is transferred to the second preheating furnace 110 using the transfer unit unit 200, .

The second preheating furnace has the same structure as the first preheating furnace 410 as described above, and the plate glass 110 is secondarily preheated by the heater operation.

In the second preheating furnace, the plate glass 110 is preheated by raising the temperature from 200 ° C to about 380 ° C in multiple stages.

That is, in the same manner as the preheating process in the first preheating furnace 410, the multi-stage heating is carried out in the second preheating furnace three times in stages up to approximately 380 ° C according to the thickness, shape and size of the glass.

At this time, the preheating temperature and time in the secondary preheating furnace are slightly different depending on the thickness of the glass plate, but the secondary preheating process is performed in about 15 minutes.

If the final preheating temperature is 380 ° C or lower, the plate glass 110 is not sufficiently preheated, so that the sodium ion on the surface of the plate glass is difficult to transfer in the next high temperature tempering furnace, so that it is difficult to carry out the ion exchange reaction with the potassium nitrate solution The reaction time may be further increased.

Therefore, there is a need to sufficiently preheat to a predetermined final preheating temperature.

As described above, the reason why the preheating process of the plate glass 110 is divided into the first preheating process and the second preheating furnace 410 by providing the first preheating furnace 410 and the second preheating furnace in the present invention is to achieve more stable preheating.

Particularly, since the first preheating furnace 410 and the second preheating furnace are divided into the first preheating furnace 410 and the second preheating furnace, the turnover of the furnace due to the preheating of the plate glass 110 in the first and second preheating processes can be increased.

That is, if the first preheating plate glass 110 is transferred to the second preheating furnace in the first preheating furnace 410, the first preheating furnace 410 becomes empty, so that the other plate glass can be naturally received continuously and continuously It is possible to perform the primary preheating.

Particularly, since the temperature range of the first preheating furnace 410 is about 200 ° C. at the normal temperature, the temperature of the first preheating furnace 410 is lowered to the initial preheating temperature after completion of the first preheating, It is advantageous in that it can reduce the process waiting time and energy consumption as compared with the case of raising and lowering the preheating temperature.

On the other hand, the provision of the first and second preheating units 400 and 500 basically causes the structure of the plate glass 110 to be damaged and damaged if the plate glass 110 is rapidly heated to a high temperature in the high- This is to prevent this.

Although it is not shown in the accompanying drawings, it is preferable to provide a temperature sensor inside the first and second preheating furnaces for precise temperature control so that the temperature does not exceed the set value.

Particularly, the heater installed in the above-described manner is not shown in the drawing, but it goes without saying that the same installation structure can be applied to a reinforced furnace, a slow cooling furnace, and the like.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit of the invention.

100: Structure 101, 102: Skeleton
103: Guide rail 104: Feed roller section
110: plate glass 120: jig
121: Hook shaft 150: opening / closing means
151: opening and closing door 160: motor
300: jig supply unit 301: jig discharge unit
400, 500: first preheating part 410: first preheating furnace
420: support body 421: heater
422: Fixing bracket 423: Fixing piece
424: Assembly metal part 600: Chemical strengthening part
700,800: first and second cold parts 900:

Claims (4)

delete delete A tempered glass manufacturing apparatus in which a heater is provided on an inner wall of each furnace to heat a plate glass mounted on a jig in a tempered glass manufacturing apparatus,
A supporting body 420 having a unitary assembly shape corresponding to the size of the inner wall of each of the comparted furnaces is disposed in the vicinity of the assembly metal fittings 424, And a heater 421 composed of one continuous wire is repeatedly mixed with the zigzag pattern and the parallel pattern by one wire on the support body 420, Wherein the heater is installed and fixed in the furnace.
The method of claim 3,
The supporting body 420 has a heat insulating property and a fixing metal fitting 422 for supporting and fixing the heater 421 is inserted into the supporting body 420. The heater 421 is fixed on the supporting body 420 in a zigzag shape Wherein a bending portion of the heater 421 adjacent to the upper and lower sides in the process of being arranged in parallel is supported and fixed by a fixing piece 423 fitted to the fixing metal 422. [ Heater installation structure in the furnace.

Images