CN110922049A - Platinum alloy crucible for drawing glass fiber and manufacturing method - Google Patents
Platinum alloy crucible for drawing glass fiber and manufacturing method Download PDFInfo
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- CN110922049A CN110922049A CN201911343169.6A CN201911343169A CN110922049A CN 110922049 A CN110922049 A CN 110922049A CN 201911343169 A CN201911343169 A CN 201911343169A CN 110922049 A CN110922049 A CN 110922049A
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- C03—GLASS; MINERAL OR SLAG WOOL
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- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/08—Bushings, e.g. construction, bushing reinforcement means; Spinnerettes; Nozzles; Nozzle plates
- C03B37/0805—Manufacturing, repairing, or other treatment of bushings, nozzles or bushing nozzle plates
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Abstract
A platinum alloy crucible for drawing glass fiber and a manufacturing method thereof are provided, wherein: the heating plate is positioned in the crucible shell and is positioned below the top cover. The top cover is arranged on the upper end surface of the crucible shell, and the connecting edge of the top cover is fixedly connected with the flanging on the heating plate. The feed tube is fixed on the through hole at the geometric center of the top cover. And a filter screen is fixed at the lower end in the crucible shell. The bushing plate is positioned at the lower end outside the crucible shell; two sides of the bushing plate are welded with bushing plate side baffles. Two plate-shaped connecting electrodes are symmetrically welded on the outer surface of the crucible shell. The bottom plate of the bushing is provided with a discharge spout. According to the invention, the heating capacity in the platinum alloy crucible is enhanced through the V-shaped platinum alloy heating plate with the thickness of 0.4mm, and the temperature in the platinum alloy crucible is improved, so that the glass batch can be directly melted for a glass fiber drawing test, and compared with the prior art, the test period is greatly shortened, and the test cost is reduced.
Description
Technical Field
The invention relates to the field of manufacturing of platinum materials, in particular to a platinum alloy crucible for drawing a low-hole-number glass batch
Background
For a long time, for a base glass with a new component, whether the base glass can be used for drawing glass fibers or not and testing the basic performance of the glass fibers needs to be tested, firstly, according to the design component composition of the glass, raw materials are mixed to prepare a glass batch, then an alumina crucible is used for melting into molten glass at high temperature, then water quenching is carried out, and then the molten glass is added into a conventional glass fiber drawing crucible for drawing test.
When the platinum alloy crucible for drawing glass fiber is used, other heating devices are required to pre-melt glass batch in advance to manufacture the base glass for drawing, and the production process is too long, so that the use cost of users is increased.
At present, glass fiber manufacturers and research institutions adopt a two-step method to perform a glass fiber drawing test, namely, an electric furnace or a crucible is used for melting basic glass for the test in the first step, and a conventional drawing crucible is used for drawing in the second step. Similar technical situations cannot be obtained from public channels, and patent documents and thesis databases at home and abroad do not find similar technologies.
The 2013205604263 patent discloses a platinum crucible for melting lead glass that can only be used to melt lead glass, and does not allow for the melting of glass batch materials for wire drawing tests.
Disclosure of Invention
In order to overcome the defects that basic glass needs to be manufactured in advance and the test period is too long in the existing glass fiber drawing test technology, so that the use cost of a user is increased, the invention provides a platinum alloy crucible for drawing glass fibers and a manufacturing method thereof.
The platinum alloy crucible for drawing glass fiber provided by the invention comprises a discharge spout, a discharge orifice, a filter screen, a crucible shell, a heating plate, a top cover, a feeding pipe, a connecting electrode and a baffle plate; wherein: the heating plate is positioned in the crucible shell and is positioned below the top cover. The top cover is arranged on the upper end surface of the crucible shell, and the connecting edge of the top cover is fixedly connected with the flanging on the heating plate. The feed tube is fixed on the through hole at the geometric center of the top cover. And a filter screen is fixed at the lower end in the crucible shell. The bushing plate is positioned at the lower end outside the crucible shell; two sides of the bushing plate are welded with bushing plate side baffles. Two plate-shaped connecting electrodes are symmetrically welded on the outer surface of the crucible shell. The bottom plate of the bushing is provided with a discharge spout.
The heating plate is bent into a V shape with an included angle of 70 degrees. A through hole is arranged at the geometric center of the heating plate, and 28 strip-shaped powder falling holes with the length l of 15mm and the width b of 8mm are uniformly distributed around the through hole; the powder falling holes in each row are arranged in three rows, and the powder falling holes in two adjacent rows are arranged in a staggered manner; the linear distance a between the adjacent edges of the two adjacent rows of powder falling holes is 6 mm. The long sides of the powder falling holes are parallel to the short sides of the heating plate.
The V-shaped sectional area of the heating plate accounts for 25% of the total sectional area of the platinum alloy crucible; the total sectional area of the platinum alloy crucible refers to the sum of the longitudinal sectional areas of two panels in the platinum alloy crucible, the longitudinal sectional area of the bushing plate, the longitudinal sectional area of the top cover and the longitudinal sectional area of the heating plate.
The thickness of the heating plate is 0.4 mm.
The drain plate is trapezoidal in shape, the width of a bottom plate in the drain plate is 22mm, three rows of through holes which are arranged in a staggered mode are formed in the bottom plate and used for welding discharge spouts, the aperture of each through hole is 2.4mm, the center distance between two adjacent rows of through holes is 6mm, the center distance between two adjacent through holes in the same row is 4mm, the inclination α of two side edges of the drain plate is 50 degrees, and flanges which are turned outwards horizontally are arranged at the upper ends of the side edges of the drain plate.
A plurality of glass liquid through holes with the diameter of 1.0mm are distributed on the filter screen. The center distance between the adjacent glass liquid through holes is 2.2 mm.
The top cover is made of a platinum alloy plate with the thickness of 0.4 mm. The surface of the top cover is in the shape of a curved arc in the width direction, and the radius r of the arc is 78 mm. The top cover has a through hole with a diameter of 60mm at the geometric center. Two long edges of the top cover are respectively provided with a horizontal flanging; the width of the flanging is 7 mm.
The connecting electrode is made of a platinum alloy plate with the thickness of 3.5 mm. A strip-shaped groove with the length of 14mm and the width of 38mm is cut on one long edge of the connecting electrode; the strip-shaped groove is positioned at one half of the long edge. The other long edge of the connecting electrode is welded with the crucible shell. Both ends of the long side of the connecting electrode with the strip-shaped groove are respectively processed into 63-degree oblique sides, and the length of each oblique side is 20 mm.
The thickness of two panels in the crucible shell is 0.4mm, and the thickness of two baffles is 1.0 mm. One short side of the baffle is an arc side, and the radius of the arc is 78 mm; the right angle at the other short side, which intersects both long sides, is machined to be a hypotenuse, the angle theta of which is 40 deg., and the length h of which is 80 mm. The length of the two long sides of the baffle is 125 mm.
The specific process for manufacturing the platinum alloy crucible for drawing the glass fiber provided by the invention comprises the following steps:
the method comprises the steps of processing three rows of through holes which are arranged in a staggered mode in the middle of the long edge of a bushing blank through punching, enabling the through holes in the middle row to be located on a symmetrical line of the long edge of the bushing, enabling the arrangement direction of the three rows of through holes which are arranged in the staggered mode to be parallel to the short edge of the bushing blank, enabling the long edge of the bushing blank to be folded from two ends to the middle through a plate bending machine, enabling the distances between the folding lines at the two ends and the outer edges of the first row of through holes and the third row of through holes in the three rows of through holes which are arranged in the staggered mode to be 3.8mm, forming two side plates of the bushing by two folding edges, and enabling the included angle 35.
The length of the bushing blank is 120mm, the width of the bushing blank is 90mm, and the thickness of the bushing blank is 0.5 mm. The top cover blank has a length of 110mm, a width of 90mm and a thickness of 0.4 mm. The thickness of the charging tube blank is 1.0 mm. The panel blank was 139mm long, 90mm wide and 0.4mm thick. One short side of the baffle plate blank is arc-shaped; the right angle at which the other short side of the baffle blank intersects the two long sides is processed into a bevel side, and the angle theta of the bevel side is 40 degrees; the length of two long sides of the baffle blank is 125mm, the radius d of the arc-shaped short side is 78mm, and the length of the straight side short side is 80 mm. The thickness of the baffle blank is 1.0 mm. The heating plate blank has a length of 170mm, a width of 90mm and a thickness of 0.4 mm. The connecting electrode blank has two blocks, the length of the connecting electrode blank is 110mm, the width of the connecting electrode blank is 70mm, and the thickness of the connecting electrode blank is 3.5 mm.
And 4, welding the discharge spout and the discharge plate: and welding the discharge spout and the discharge plate together through argon arc welding.
Step 7, welding a feeding pipe and a top cover: and (3) placing the platinum alloy feeding pipe into the hole of the top cover, and welding the feeding pipe and the top cover together through argon arc welding.
Step 11, manufacturing a connecting electrode: respectively cutting strip-shaped grooves for externally connecting copper chucks on the symmetrical surfaces of the two connecting electrode blanks in the length direction, and enabling the center lines of the strip-shaped grooves in the width direction to be parallel to the two short edges of the connecting electrode blanks. Respectively cutting and processing two bevel edges at right angles at two ends of a long edge where the notch of the strip-shaped groove is located; the angle delta between the oblique side and the long side of the blank is 63 deg., and the length j of the oblique side is 20 mm.
Step 12, welding, assembling and forming: and the crucible parts are welded and assembled together through argon arc welding on the bushing plate one by one according to the sequence of the filter screen, the crucible shell, the heating plate, the top cover with the feeding pipe, the baffle and the connecting electrode. After welding and assembling, the low-hole-number glass batch is obtained and is directly drawn into a platinum alloy crucible for glass fiber.
When assembling: welding the filter screen in the upper port of the bushing plate and leveling the filter screen with the horizontal flanging; and respectively welding flanges at the lower ends of the two panels in the crucible shell on the upper surfaces of the horizontal flanges of the bushing plates. And welding the flanges at the two sides of the heating plate with the flanges at the upper ends of the panels. The large-caliber end of the feeding pipe is welded at the center of the top cover, so that the feeding pipe is communicated with the through hole at the center of the top cover; and welding the flanging of the top cover with the flanging at the upper end of the heating plate. The connection electrode is welded on one surface of the baffle plate, and the connection electrode is positioned on a symmetrical plane in the width direction of the baffle plate. Two long edges of the baffle are welded with the long edges of the two panels, the arc short edge at the upper end of the baffle is welded on the lower surface of the top cover, and the bevel edge and the short edge at the lower end are respectively welded with the bushing.
The V-shaped platinum alloy heating plate with the thickness of 0.4mm is fixed, so that the heating capacity in the platinum alloy crucible is enhanced, the temperature in the platinum alloy crucible is improved, the glass batch can be directly melted for a glass fiber drawing test, the test period is greatly shortened compared with the prior art, and the test cost is reduced.
According to the invention, through the structural design, the heating capacity in the crucible is enhanced, so that the glass batch is fully melted, and further can smoothly flow out of the bushing tip and is drawn into glass fibers by the wire drawing equipment. The difficulty that the conventional wire drawing test needs to utilize an electric furnace or a crucible to melt the basic glass for the test in advance and then use the conventional wire drawing crucible for wire drawing is fundamentally solved. In the process of wire drawing test, the test period is reduced from about 15 days of each original formula to 3-5 days, the cost is low, the test period is shortened for enterprises, the efficiency is improved, and the positive promotion effect is exerted.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a view from a-a in fig. 1.
Fig. 3 is a view from B-B in fig. 1.
Fig. 4 is a front view of a bushing.
Fig. 5 is a side view of fig. 4.
Fig. 6 is a top view of fig. 4.
Fig. 7 is a schematic structural view of the top cover.
Fig. 8 is a top view of fig. 7.
FIG. 9 is a schematic view of the structure of the feed tube.
FIG. 10 is a schematic view of the welding of the filling tube to the top cover.
Fig. 11 is a schematic view of a screen construction.
FIG. 12 is a schematic view of the structure of the crucible housing panel.
Fig. 13 is an expanded view of the heating plate.
Fig. 14 is a front view of the heating plate.
Fig. 15 is a schematic view of the structure of the connection electrode.
Fig. 16 is a schematic view of the structure of the baffle.
In the figure: 1. a discharge spout; 2. a bushing; 3. filtering with a screen; 4. a crucible housing; 5. heating plates; 6. a top cover; 7. a feed tube; 8. connecting the electrodes; 9. and a baffle plate.
Detailed Description
This example is a volume of 1000cm3The platinum alloy crucible for drawing the low-hole-number glass batch comprises a discharge spout 1, a discharge plate 2, a filter screen 3, a crucible shell 4, a heating plate 5, a top cover 6, a feeding pipe 7, a connecting electrode 8 and a baffle 9; wherein: the heating plate 5 is positioned in the crucible shell and below the top cover. The top cover 6 is arranged on the upper end surface of the crucible shell, and the connecting edge of the top cover is fixedly connected with the flanging on the heating plate. The filling tube 7 is fixed on the through hole at the geometric center of the top cover. A filter screen 3 is fixed at the lower end in the crucible shell. The bushing plate 2 is positioned at the lower end outside the crucible shell; two sides of the bushing plate are welded with bushing plate side baffles. Two plate-shaped connecting electrodes 8 are symmetrically welded on the outer surface of the crucible shell. The bottom plate of the bushing is provided with a discharge spout 1.
The heating plate 5 is V-shaped with an included angle of 70 degrees, a temperature measuring hole with the diameter of 30mm is arranged in the center of the bottom of the heating plate and is used for measuring the vertical temperature distribution of glass liquid in a crucible in the glass batch drawing test process, the included angle β between wing plates at two sides of the heating plate is 70 degrees, 28 strip-shaped powder falling holes with the diameter of 8mm multiplied by 15mm are uniformly distributed on the two wing plates of the heating plate, the length l of each powder falling hole is 15mm, the width b of each powder falling hole is 8mm, the powder falling holes in each row are arranged in rows, the powder falling holes in two adjacent rows are arranged in a staggered mode, the linear distance a between the adjacent edges of the powder falling holes in two adjacent rows is 6mm, the long edge of each powder falling hole is parallel to the short edge of the heating plate, outward flanges are arranged at the upper ends of the wing plates at two sides of the heating plate, the width of each flange.
The V-shaped sectional area of the heating plate accounts for 25% of the total sectional area of the platinum alloy crucible; the total sectional area of the platinum alloy crucible refers to the sum of the longitudinal sectional areas of two panels in the platinum alloy crucible, the longitudinal sectional area of the bushing plate, the longitudinal sectional area of the top cover and the longitudinal sectional area of the heating plate. The longitudinal sectional areas of the two panels are equal to length multiplied by thickness multiplied by 2; the longitudinal section area of the bushing is equal to height multiplied by thickness; the longitudinal section area of the top cover is equal to the arc length multiplied by the thickness; the longitudinal cross-sectional area of the heating plate is length × thickness.
The drain plate 2 is trapezoidal in shape, the width of a bottom plate in the drain plate is 22mm, three rows of through holes which are arranged in a staggered mode are formed in the bottom plate and used for welding discharge spouts, the aperture of each through hole is 2.4mm, the center distance between two adjacent rows of through holes is 6mm, the center distance between two adjacent through holes in the same row is 4mm, the inclination α of two side edges of the drain plate 2 is 50 degrees, and flanges which are turned outwards horizontally are arranged at the upper ends of the side edges of the drain plate.
The filter screen 3 is made of a platinum alloy plate with the thickness of 0.4mm, the length of the platinum alloy plate is 94mm, and the width of the platinum alloy plate is 90 mm. A plurality of glass melt through holes with the diameter of 1.0mm are distributed on the filter screen and are used for the molten glass to pass through and preventing the unmelted glass batch from passing through. The center-to-center spacing of adjacent holes was 2.2 mm.
The top cover 6 is plate-shaped, and the length and the width of the top cover are respectively 110mm and 90 mm. Is made of a platinum alloy plate with the thickness of 0.4 mm. The surface of the top cover is in the shape of a curved arc in the width direction, and the radius r of the arc is 78 mm. The top cover has a through hole with a diameter of 60mm at the geometric center. Two long edges of the top cover are respectively provided with a horizontal flanging; the width of the flanging is 7 mm.
The feed pipe 7 is a conical pipe, the large-diameter end of the feed pipe is welded with the through hole in the top cover, and the upper end of the feed pipe is used for adding glass batch for tests.
The two connecting electrodes 8 are made of platinum alloy plates with the thickness of 3.5 mm. The length of the connecting electrode is 110mm, and the width is 70 mm. A strip-shaped groove with the length of 14mm and the width of 38mm is cut on one long edge of the connecting electrode and is used for connecting a copper chuck; the strip-shaped groove is positioned at one half of the long edge. The other long side of the connecting electrode is welded to the crucible housing 4. In order to reduce the platinum occupation, the two ends of the long edge of the strip-shaped groove of the connecting electrode are respectively processed into a bevel edge of 63 degrees, and the length of the bevel edge is 20 mm.
The cross section of the crucible shell 4 is rectangular and is formed by welding two panels and two baffles 9, the two panels are respectively used as a front panel and a rear panel of the crucible shell, and the two baffles are respectively used as two side plates of the crucible shell. The two panels are both made of platinum alloy plates with the thickness of 0.4mm, and the width of the two panels is 125 mm; the two baffle plates are made of platinum alloy plates with the thickness of 1.0 mm.
The baffle is rectangular, one short side of the baffle is an arc side, and the radius of the arc is 78 mm; the right angle at the other short side, which intersects both long sides, is machined to be a hypotenuse, the angle theta of which is 40 deg., and the length h of which is 80 mm. The length of the two long sides of the baffle is 125 mm.
Two sides of the heating plate 5 which is bent and is partially opened are welded at the baffle plates at two sides of the crucible and are connected with connecting electrodes outside the baffle plates, and the other two sides of the heating plate 5 which is bent and is partially opened are flush with the upper edge of the crucible shell by a welding method.
The platinum alloy crucible is used for drawing the glass batch with low hole number.
The specific process for manufacturing the platinum alloy crucible comprises the following steps:
The bushing plate blank for manufacturing the bushing plate is a platinum alloy plate, and the length, the width and the thickness of the bushing plate blank are respectively 120mm, 90mm and 0.5 mm.
The discharge spout blank for manufacturing the discharge spout is a platinum alloy tube, and the inner diameter of the platinum alloy tube is 1.6mm, and the outer diameter of the platinum alloy tube is 2.4 mm.
The top cover blank used for manufacturing the top cover is a platinum alloy plate, and the length of the top cover blank is 110mm, the width of the top cover blank is 90mm, and the thickness of the top cover blank is 0.4 mm.
The charging tube blank used for manufacturing the charging tube is a platinum alloy plate, the charging tube blank is a fan-shaped plate, the upper arc length of the charging tube blank is 125.6mm, the lower arc length of the charging tube blank is 188.4mm, the height of the charging tube blank is 65mm, and the thickness of the charging tube blank is 1.0 mm.
The filter screen blank used for manufacturing the filter screen is a platinum alloy plate, and the filter screen blank is a rectangle with the length of 94mm and the width of 90 mm.
The panel blank for manufacturing the crucible shell panel is a platinum alloy plate, and the two panel blanks are rectangular plates with the length of 139mm, the width of 90mm and the thickness of 0.4 mm. The baffle blank for manufacturing the crucible shell baffle is a platinum alloy plate, and the number of the baffle blanks is two. The baffle plate blank is rectangular, and one short side of the baffle plate blank is arc-shaped; the right angle at which the other short side of the baffle blank intersects the two long sides is processed into a bevel side, and the angle theta of the bevel side is 40 degrees; the length of two long sides of the baffle blank is 125mm, the radius d of the arc-shaped short side is 78mm, and the length of the straight side short side is 80 mm. The thickness of the baffle blank is 1.0 mm.
The heating plate blank for manufacturing the heating plate is a platinum alloy plate, and the heating plate blank is rectangular with the length of 170mm, the width of 90mm and the thickness of 0.4 mm.
The connecting electrode blank used for manufacturing the connecting electrode is a platinum alloy plate, the connecting electrode blank comprises two connecting electrode blanks, the thickness of each connecting electrode blank is 3.5mm, the length of each connecting electrode blank is 110mm, and the width of each connecting electrode blank is 70 mm.
and three rows of staggered through holes are processed in the middle of the long edge of the bushing blank by punching, and the through holes in the middle row are positioned on the symmetrical line of the long edge of the bushing. The arrangement direction of the three rows of staggered through holes is parallel to the short edge of the bushing blank.
The long edge of the bushing blank is folded from two ends to the middle through a plate bending machine, the distances between the folding lines at the two ends and the outer edges of the first row of through holes and the third row of through holes in the three rows of staggered through holes are 3.8mm, two side plates of the bushing are formed by the two folding edges, and the included angle α between the two side plates and the bottom plate is 50 degrees.
And processing horizontal welding flanges at the top ends of the two side plates through a plate bending machine. The flanging faces to the outer side of the side plate. The width of the flanging is 7 mm.
And 4, welding the discharge spout and the discharge plate: the method comprises the steps of placing a platinum alloy discharge spout into a discharge spout hole, welding the discharge spout and a discharge plate together through argon arc welding, sealing the lower opening of the discharge spout with paraffin, checking whether the discharge spout leaks with a red solution, and cleaning the discharge spout after the discharge spout is qualified for later use.
Step 7, welding a feeding pipe and a top cover: and (3) placing the platinum alloy feeding pipe into the hole of the top cover, and welding the feeding pipe and the top cover together through argon arc welding.
Step 11, manufacturing a connecting electrode: a strip-shaped groove with the length of 14mm and the width of 38mm is cut on a symmetrical surface of the connecting electrode blank in the length direction, and the center line of the strip-shaped groove in the width direction is parallel to two short sides of the connecting electrode blank. The strip-shaped groove is used for connecting the copper chuck. Respectively cutting and processing two bevel edges at right angles at two ends of a long edge where the notch of the strip-shaped groove is located; the angle delta between the oblique side and the long side of the blank is 63 deg., and the length j of the oblique side is 20 mm.
Step 12, welding, assembling and forming: the crucible parts are welded and assembled together through argon arc welding on the bushing plate in sequence according to the sequence of the filter screen 3, the crucible shell 4, the heating plate 5, the top cover with the feeding pipe, the baffle 9 and the connecting electrode 8. After welding and assembling, the low-hole-number glass batch is obtained and is directly drawn into a platinum alloy crucible for glass fiber.
When assembling: welding the filter screen 3 in the upper port of the bushing plate and leveling the filter screen with the horizontal flanging; the flanges at the lower ends of the two panels in the crucible shell 4 are respectively welded on the upper surfaces of the horizontal flanges of the bushing plates. And welding the flanges at two sides of the heating plate 5 with the flanges at the upper end of each panel. The large-caliber end of the feed pipe 7 is welded at the center of the top cover, so that the feed pipe is communicated with the through hole at the center of the top cover; and welding the flanging of the top cover with the flanging at the upper end of the heating plate. The connection electrode 8 is welded to one surface of the baffle plate 9 so as to be located on a symmetrical plane in the width direction of the baffle plate. Two long edges of the baffle plate 9 are welded with the long edges of the two panels, the arc short edge at the upper end of the baffle plate is welded on the lower surface of the top cover, and the bevel edge and the short edge at the lower end are respectively welded with the bushing.
Claims (9)
1. A platinum alloy crucible for drawing glass fiber is characterized by comprising a discharge spout, a discharge orifice, a filter screen, a crucible shell, a heating plate, a top cover, a feeding pipe, a connecting electrode and a baffle plate; wherein: the hot plate is located in the crucible shell, wherein: the heating plate is positioned in the crucible shell and below the top cover; the top cover is arranged on the upper end surface of the crucible shell, and the connecting edge of the top cover is fixedly connected with the flanging on the heating plate; the feeding pipe is fixed on the through hole at the geometric center of the top cover; a filter screen is fixed at the lower end in the crucible shell; the bushing plate is positioned at the lower end outside the crucible shell; two sides of the bushing plate are welded with bushing plate side baffles; two plate-shaped connecting electrodes are symmetrically welded on the outer surface of the crucible shell; the bottom plate of the bushing is provided with a discharge spout.
2. The platinum alloy crucible for drawing glass fiber as set forth in claim 1, wherein said heating plate is bent in a V shape having an included angle of 70 °; a through hole is arranged at the geometric center of the heating plate, and 28 strip-shaped powder falling holes with the length l of 15mm and the width b of 8mm are uniformly distributed around the through hole; the powder falling holes in each row are arranged in three rows, and the powder falling holes in two adjacent rows are arranged in a staggered manner; the linear distance a between the adjacent edges of the two adjacent rows of powder falling holes is 6 mm; the long side of each powder falling hole is parallel to the short side of the heating plate;
the V-shaped sectional area of the heating plate accounts for 25% of the longitudinal sectional area of the platinum alloy crucible; the total cross section of the platinum alloy crucible refers to the sum of the longitudinal cross sections of two panels in the platinum alloy crucible, the longitudinal cross section of the bushing plate, the longitudinal cross section of the top cover and the longitudinal cross section of the heating plate;
the thickness of the heating plate is 0.4 mm.
3. A platinum alloy crucible for drawing glass fiber as defined in claim 1, wherein said bushing has a trapezoidal shape, a bottom plate of said bushing has a width of 22mm, three staggered rows of through holes for welding tips are formed in said bottom plate, said through holes have a diameter of 2.4mm, a center distance between two adjacent rows of through holes is 6mm, a center distance between two adjacent through holes in the same row is 4mm, a slope α of two sides of said bushing is 50 °, and flanges are formed at upper ends of the sides of said bushing to be turned out horizontally.
4. The platinum alloy crucible for drawing glass fiber as set forth in claim 1, wherein a plurality of molten glass pass through holes having a diameter of 2.2mm are distributed on said screen; the center distance between adjacent glass liquid through holes is 2 mm.
5. The platinum alloy crucible for drawing glass fiber as set forth in claim 1, wherein said top cover is made of a platinum alloy plate having a thickness of 0.4 mm; the surface of the top cover is in an arched arc shape along the width direction, and the radius r of the arc is 78 mm; a through hole with the diameter of 60mm is arranged at the geometric center of the top cover; two long edges of the top cover are respectively provided with a horizontal flanging; the width of the flanging is 7 mm.
6. The platinum alloy crucible for drawing glass fiber as set forth in claim 1, wherein said connection electrode is made of a platinum alloy plate having a thickness of 3.5 mm; a strip-shaped groove with the length of 14mm and the width of 38mm is cut on one long edge of the connecting electrode; the strip-shaped groove is positioned at one half of the long side; the other long edge of the connecting electrode is welded with the crucible shell; both ends of the long side of the connecting electrode with the strip-shaped groove are respectively processed into 63-degree oblique sides, and the length of each oblique side is 20 mm.
7. The platinum alloy crucible for drawing glass fiber as claimed in claim 1, wherein the thickness of the two panels in the crucible shell is 0.4mm, and the thickness of the two baffles is 1.0 mm; one short side of the baffle is an arc side, and the radius of the arc is 78 mm; the right angle of the other short side, which is intersected with the two long sides, is processed into a bevel side, the angle theta of the bevel side is 40 degrees, and the length h of the short side is 80 mm; the length of the two long sides of the baffle is 125 mm.
8. A platinum alloy crucible for drawing a glass fiber according to claim 1, which is prepared by the following steps:
step 1, preparation of a blank: the blanks are made of platinum alloy raw materials; the device comprises a bushing plate blank, a bushing tip blank, a filter screen blank, a crucible shell blank, a heating plate blank, a top cover blank, a connecting electrode blank and a baffle blank;
step 2, preparing a bushing:
the method comprises the steps of punching the middle of the long edge of a bushing blank to process three rows of through holes which are arranged in a staggered manner, and enabling the through holes in the middle row to be located on a symmetrical line of the long edge of the bushing, wherein the arrangement direction of the three rows of through holes which are arranged in a staggered manner is parallel to the short edge of the bushing blank;
step 3, preparing a discharge spout: cutting a platinum alloy pipe with the inner diameter of 1.6mm and the outer diameter of 2.4mm into a discharge spout; the length of the discharge spout is 5.5 mm;
and 4, welding the discharge spout and the discharge plate: welding the discharge spout and the discharge plate together through argon arc welding;
step 5, preparing a top cover: punching a through hole in the geometric center of the top cover blank; bending the shape of the top cover into an arc shape with the radius of 78mm along the width direction;
step 6, preparing a feeding pipe: manufacturing a charging tube blank into a conical tube shape, and cutting the lower end face of the charging tube into an arc shape matched with the top cover hole;
step 7, welding a feeding pipe and a top cover: placing a platinum alloy feeding pipe into a top cover hole, and welding the feeding pipe and the top cover together through argon arc welding;
step 8, preparing a filter screen: punching a plurality of uniformly distributed round holes on the filter screen blank;
step 9, preparing the crucible shell: bending two long sides of the panel blank in the same direction by 90 degrees respectively to form welding flanges;
step 10, preparing a heating plate: punching a central hole with the diameter of 30mm in the geometric center of the heating plate blank; punching strip-shaped holes on two sides of the round hole, and enabling the strip-shaped holes to be uniformly distributed on two sides of the central hole in a staggered manner; folding the symmetrical line of the heating plate blank in the length direction to form a V-shaped groove with an included angle of 70 degrees; processing welding flanges at the top ends of the two V-shaped edges through a plate bending machine;
step 11, preparing a connecting electrode: respectively cutting strip-shaped grooves for externally connecting copper chucks on the symmetrical surfaces of the two connecting electrode blanks in the length direction, and enabling the center lines of the strip-shaped grooves in the width direction to be parallel to the two short edges of the connecting electrode blanks; respectively cutting and processing two bevel edges at right angles at two ends of a long edge where the notch of the strip-shaped groove is located; the included angle delta between the bevel edge and the long edge of the blank is 63 degrees, and the length j of the bevel edge is 20 mm;
step 12, welding, assembling and forming: the crucible parts are welded and assembled together one by one through argon arc welding on the bushing plate according to the sequence of the filter screen, the crucible shell, the heating plate, the top cover with the feeding pipe, the baffle and the connecting electrode;
welding and assembling to obtain a low-hole-number glass batch, and directly pulling a platinum alloy crucible for glass fibers;
when assembling: welding the filter screen in the upper port of the bushing plate and leveling the filter screen with the horizontal flanging; respectively welding flanges at the lower ends of two panels in the crucible shell on the upper surfaces of the horizontal flanges of the bushing plates; welding the flanges at the two sides of the heating plate with the flanges at the upper end of each panel; the large-caliber end of the feeding pipe is welded at the center of the top cover, so that the feeding pipe is communicated with the through hole at the center of the top cover; welding the flanging of the top cover with the flanging at the upper end of the heating plate; the connecting electrode is welded on one surface of the baffle plate and is positioned on a symmetrical plane in the width direction of the baffle plate; two long edges of the baffle are welded with the long edges of the two panels, the arc short edge at the upper end of the baffle is welded on the lower surface of the top cover, and the bevel edge and the short edge at the lower end are respectively welded with the bushing.
9. The method of drawing a glass fiber platinum alloy crucible as claimed in claim 8, wherein said bushing blank has a length of 120mm, a width of 90mm and a thickness of 0.5 mm; the top cover blank is 110mm in length, 90mm in width and 0.4mm in thickness; the thickness of the charging pipe blank is 1.0 mm; the panel blank is 139mm long, 90mm wide and 0.4mm thick; one short side of the baffle plate blank is arc-shaped; the right angle at which the other short side of the baffle blank intersects the two long sides is processed into a bevel side, and the angle theta of the bevel side is 40 degrees; the length of two long sides of the baffle blank is 125mm, the radius d of the arc-shaped short side is 78mm, and the length of the straight side short side is 80 mm; the thickness of the baffle blank is 1.0 mm; the heating plate blank is 170mm in length, 90mm in width and 0.4mm in thickness; the connecting electrode blank has two blocks, the length of the connecting electrode blank is 110mm, the width of the connecting electrode blank is 70mm, and the thickness of the connecting electrode blank is 3.5 mm.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113369683A (en) * | 2021-06-04 | 2021-09-10 | 方超群 | Platinum crucible laser welding machine for preparing scintillation crystal |
| CN114770051A (en) * | 2022-05-19 | 2022-07-22 | 董淑波 | Glass fiber wire drawing bushing plate processing technology |
| CN114792778A (en) * | 2022-05-05 | 2022-07-26 | 中国科学院上海高等研究院 | Batch shaping and filling system for hollow fiber electrode green blanks and application of batch shaping and filling system |
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| CN2878380Y (en) * | 2005-11-29 | 2007-03-14 | 中材科技股份有限公司 | Premelting platinum alloy crucible for glass fiber wire-drawing |
| CN208279508U (en) * | 2018-03-12 | 2018-12-25 | 南昌金轩科技有限公司 | A kind of glass fibre platinum alloy crucibles |
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| CN2878380Y (en) * | 2005-11-29 | 2007-03-14 | 中材科技股份有限公司 | Premelting platinum alloy crucible for glass fiber wire-drawing |
| CN208279508U (en) * | 2018-03-12 | 2018-12-25 | 南昌金轩科技有限公司 | A kind of glass fibre platinum alloy crucibles |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113369683A (en) * | 2021-06-04 | 2021-09-10 | 方超群 | Platinum crucible laser welding machine for preparing scintillation crystal |
| CN113369683B (en) * | 2021-06-04 | 2023-02-03 | 方超群 | Platinum crucible laser welding machine for preparing scintillation crystal |
| CN114792778A (en) * | 2022-05-05 | 2022-07-26 | 中国科学院上海高等研究院 | Batch shaping and filling system for hollow fiber electrode green blanks and application of batch shaping and filling system |
| CN114792778B (en) * | 2022-05-05 | 2023-05-12 | 中国科学院上海高等研究院 | Hollow fiber electrode green body batch shaping and filling system and application thereof |
| CN114770051A (en) * | 2022-05-19 | 2022-07-22 | 董淑波 | Glass fiber wire drawing bushing plate processing technology |
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