CN220946746U - Expanded polytetrafluoroethylene membrane sintering device - Google Patents
Expanded polytetrafluoroethylene membrane sintering device Download PDFInfo
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- CN220946746U CN220946746U CN202322545289.2U CN202322545289U CN220946746U CN 220946746 U CN220946746 U CN 220946746U CN 202322545289 U CN202322545289 U CN 202322545289U CN 220946746 U CN220946746 U CN 220946746U
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- 238000005245 sintering Methods 0.000 title claims abstract description 182
- 229920000295 expanded polytetrafluoroethylene Polymers 0.000 title claims abstract description 123
- 239000012528 membrane Substances 0.000 title claims abstract description 21
- 239000004020 conductor Substances 0.000 claims abstract description 7
- 238000004804 winding Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 9
- 229920001343 polytetrafluoroethylene Polymers 0.000 abstract description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 abstract description 6
- -1 polytetrafluoroethylene Polymers 0.000 abstract description 5
- 230000008961 swelling Effects 0.000 abstract description 5
- 238000010030 laminating Methods 0.000 description 25
- 239000010410 layer Substances 0.000 description 20
- 239000007888 film coating Substances 0.000 description 8
- 238000009501 film coating Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000002489 tectorial membrane Anatomy 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The utility model provides a swelling polytetrafluoroethylene film sintering device, which comprises a sintering roller and a sleeving device, wherein the sleeving device comprises a sleeve, a first connecting part and a second connecting part, the sleeve is sleeved on the sintering roller so as to clamp the swelling polytetrafluoroethylene film between the outer wall of the sintering roller and the inner wall of the sleeve, and the sleeve is made of a heat conducting material; the sleeve is provided with a gap, two ends of the sleeve at the position of the gap are respectively provided with a first end and a second end, and the first connecting part and the second connecting part are respectively connected with the first end and the second end; the first connecting part is connected with the second connecting part through a fastener, and the fastener is used for adjusting the distance between the first connecting part and the second connecting part so as to adjust the width of the gap. The expanded polytetrafluoroethylene membrane sintering device provided by the utility model can avoid or improve the problems of bubbles, bulges, layering, uneven thickness, poor binding force between membrane layers and the like of the expanded polytetrafluoroethylene membrane in the sintering process.
Description
Technical Field
The utility model relates to the technical field of expanded polytetrafluoroethylene membrane manufacturing equipment, in particular to an expanded polytetrafluoroethylene membrane sintering device.
Background
Expanded Polytetrafluoroethylene (PTFE) is produced from polytetrafluoroethylene resin by a special processing method such as stretching, and has a network structure formed by connecting fine fibers, and numerous fine pores are formed between these fine fibers. The expanded polytetrafluoroethylene has the characteristics of good chemical resistance, wear resistance, extremely strong high temperature/low temperature resistance, small pore diameter, high porosity, uniform pore diameter distribution, high strength, small relative density and the like, and can be used in fields requiring high-temperature sealing and having requirements on weight, such as the technical field of aerospace.
In order to obtain the expanded polytetrafluoroethylene film with the required thickness, when the expanded polytetrafluoroethylene film is manufactured, the expanded polytetrafluoroethylene film is generally wound on a sintering roller to form a layer-by-layer stacked structure, then the sintering roller wound with the expanded polytetrafluoroethylene film is placed into a sintering oven to be sintered, so that multiple layers of expanded polytetrafluoroethylene films are bonded together, and the expanded polytetrafluoroethylene film with the required thickness is obtained (specifically, when the expanded polytetrafluoroethylene film is sintered, the sintering temperature is higher than the melting temperature of the expanded polytetrafluoroethylene film, so that the expanded polytetrafluoroethylene film is melted, and adjacent expanded polytetrafluoroethylene film layers are bonded together after the melting, so that the expanded polytetrafluoroethylene film with the required thickness is obtained).
In order to enable the multiple layers of expanded polytetrafluoroethylene films to adhere well together during sintering, adjacent expanded polytetrafluoroethylene film layers need to be closely adhered during sintering, i.e. a certain tensioning force is needed when the expanded polytetrafluoroethylene films are wound on a sintering roller. In the prior art, during sintering, an expanded polytetrafluoroethylene film is directly wound on a sintering roller and then sintered; the surface energy of the expanded polytetrafluoroethylene film is smaller, the film layers cannot be tightly attached to each other (namely, the film layers cannot be attached together through the adhesive of the film layers) during winding, namely, the tension of the expanded polytetrafluoroethylene film cannot be well controlled, and the sintered product is easy to have the problems of bubbles, bulges, layering, uneven thickness, poor binding force between the film layers and the like, so that the quality of the sintered product is greatly affected.
Disclosure of utility model
The utility model aims to provide a swelling polytetrafluoroethylene film sintering device which can avoid or improve the problems of bubbles, swelling, layering, uneven thickness, poor bonding force between film layers and the like of a swelling polytetrafluoroethylene film in the sintering process.
The utility model provides a sintering device of an expanded polytetrafluoroethylene film, which comprises a cylindrical sintering roller and a sleeving device, wherein the sintering roller is used for winding the expanded polytetrafluoroethylene film; the sleeve joint device comprises a cylindrical sleeve, a first connecting part and a second connecting part, the sleeve is sleeved on the sintering roller so as to clamp the expanded polytetrafluoroethylene film between the outer wall of the sintering roller and the inner wall of the sleeve, and the sleeve is made of a heat conducting material; the sleeve is provided with a gap which penetrates through the sleeve along the axial direction of the sleeve; the two ends of the sleeve at the position of the gap are respectively a first end and a second end, the first connecting part and the second connecting part are respectively connected with the first end and the second end, and the first connecting part and the second connecting part are arranged at intervals; the first connecting portion is connected with the second connecting portion through a fastener, the fastener is used for adjusting the distance between the first connecting portion and the second connecting portion so as to adjust the width of the gap, and then the inner diameter of the sleeve is adjusted.
In one implementation, the first connection portion and the second connection portion are both sheet-like structures, and the first connection portion and the second connection portion are both located outside the sleeve; one end of the first connecting part is connected with the first end, and the other end of the first connecting part extends outwards towards one side far away from the center of the sleeve; one end of the second connecting part is connected with the second end, and the other end of the second connecting part extends outwards towards one side far away from the center of the sleeve.
In one implementation manner, the first connecting portion and the second connecting portion are both in a strip-shaped sheet structure, the first connecting portion and the second connecting portion are both arranged along the axial extension of the sleeve, and the first connecting portion and the second connecting portion are arranged oppositely in parallel.
In one implementation manner, the sleeve is provided with the slit, and other positions of the sleeve except for the slit are all continuous structures.
In one implementation, the sleeve, the first connection portion, and the second connection portion are of unitary construction.
In one implementation, the fastener is a bolt, and bolt holes through which the bolt passes are formed in the first connecting portion and the second connecting portion.
In one implementation manner, the number of the fasteners is multiple, the first connecting portion is connected with the second connecting portion through the fasteners, and the fasteners are uniformly arranged at intervals along the axial direction of the sleeve.
In one realisable form, the distance between two adjacent said fasteners is between 3cm and 10cm.
In one possible embodiment, the inner diameter of the sleeve in the initial state is smaller than or equal to the outer diameter of the sintering roller.
In one realisable form, the length of the sleeve is less than or equal to the length of the sintering roller.
In one implementation, the sleeve is made of a stainless steel material.
According to the expanded polytetrafluoroethylene film sintering device, the sleeve joint device is arranged and comprises the sleeve, the sleeve is sleeved on the sintering roller, the expanded polytetrafluoroethylene film can be clamped between the outer wall of the sintering roller and the inner wall of the sleeve, so that the film covering tension between film layers in the expanded polytetrafluoroethylene film is kept, the film layers are tightly attached, air can be isolated from contacting with the expanded polytetrafluoroethylene film, and the problems of bubbles, bulges, layering, uneven thickness, poor binding force between film layers and the like of the expanded polytetrafluoroethylene film in the sintering process are avoided or improved. Meanwhile, as the sleeve is covered on the expanded polytetrafluoroethylene film and is made of a heat conducting material, when in sintering, the sintering oven firstly heats the sleeve, and then the sleeve is used for heating the expanded polytetrafluoroethylene film, so that the heating uniformity can be improved, the deformation of the expanded polytetrafluoroethylene film in the sintering process is greatly reduced, and the binding force between the film layers in the expanded polytetrafluoroethylene film is further increased.
Meanwhile, the sleeving device further comprises a first connecting part and a second connecting part, the first connecting part is connected with the second connecting part through a fastener, the fastener can adjust the distance between the first connecting part and the second connecting part so as to adjust the width of the gap, and then adjust the inner diameter of the sleeve, so that the extrusion force of the sleeve on the expanded polytetrafluoroethylene film is adjusted so as to adapt to different tension demands and film thickness.
Drawings
FIG. 1 is a schematic perspective view of a sintering device for expanded polytetrafluoroethylene film in an embodiment of the utility model.
Fig. 2 is a schematic diagram of the explosive structure of fig. 1.
FIG. 3 is a schematic cross-sectional view of an expanded polytetrafluoroethylene membrane sintering apparatus according to an embodiment of the utility model after the expanded polytetrafluoroethylene membrane is provided thereon.
Detailed Description
The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.
The terms upper, lower, left, right, front, rear, top, bottom and the like (if any) in the description and in the claims are used for descriptive purposes and not necessarily for describing relative positions of structures in the figures and in describing relative positions of structures. It should be understood that the use of directional terms should not be construed to limit the scope of the utility model as claimed.
As shown in fig. 1 to 3, the expanded polytetrafluoroethylene film sintering device provided by the embodiment of the utility model comprises a cylindrical sintering roller 1 and a sleeving device 2, wherein the sintering roller 1 is used for winding an expanded polytetrafluoroethylene film 3 (namely, the expanded polytetrafluoroethylene film 3 is wound on the outer wall of the sintering roller 1). The sleeving device 2 comprises a cylindrical sleeve 21, a first connecting part 22 and a second connecting part 23, wherein the sleeve 21 is sleeved on the sintering roller 1 so as to clamp the expanded polytetrafluoroethylene film 3 between the outer wall of the sintering roller 1 and the inner wall of the sleeve 21, and the sleeve 21 is made of a heat conducting material. The sleeve 21 is provided with a slit 210, the slit 210 penetrates through the sleeve 21 along the axial direction of the sleeve 21, and the sleeve 21 is broken at the position of the slit 210. The sleeve 21 has a first end 211 and a second end 212 at two ends of the slit 210, the first connecting portion 22 and the second connecting portion 23 are connected to the first end 211 and the second end 212, and the first connecting portion 22 and the second connecting portion 23 are disposed at intervals. The first connecting portion 22 is connected with the second connecting portion 23 through a fastener 24, and the fastener 24 is used for adjusting the distance between the first connecting portion 22 and the second connecting portion 23 so as to adjust the width of the gap 210 and further adjust the inner diameter of the sleeve 21. Wherein, in fig. 1 and 2, the expanded polytetrafluoroethylene film 3 is not wound on the sintering roller 1, and the fastening piece 24 is not installed on the sleeving device 2; in fig. 3, an expanded polytetrafluoroethylene film 3 is wound around a sintering roll 1.
The expanded polytetrafluoroethylene membrane sintering device that this embodiment provided, through setting up the device 2 that cup joints, the device 2 that cup joints includes sleeve 21, sleeve 21 cover is located on sintering roller 1, can press from both sides expanded polytetrafluoroethylene membrane 3 between the outer wall of sintering roller 1 and the inner wall of sleeve 21, thereby keep the tectorial membrane tension between rete and the rete in expanded polytetrafluoroethylene membrane 3, make closely laminating between rete and the rete, and can keep apart air and expanded polytetrafluoroethylene membrane 3 contact (among the prior art, expanded polytetrafluoroethylene membrane is direct winding on sintering roller, and there is not the sleeve and covers the protection, so the air can be direct with expanded polytetrafluoroethylene membrane surface contact), thereby avoid or improve expanded polytetrafluoroethylene membrane 3 in the sintering process and appear bubble, bulge, layering, uneven thickness, the subambient scheduling problem of cohesion between the rete. Meanwhile, as the sleeve 21 is covered on the expanded polytetrafluoroethylene film 3 and the sleeve 21 is made of a heat conducting material, when in sintering, the sintering oven firstly heats the sleeve 21 and then heats the expanded polytetrafluoroethylene film 3 by using the sleeve 21, so that the heating uniformity can be improved (specifically, when in sintering, the sintering oven firstly heats the air in the oven, the heated air heats the sleeve 21 and then uniformly heats the expanded polytetrafluoroethylene film 3 by using the sleeve 21), thereby greatly reducing the deformation of the expanded polytetrafluoroethylene film 3 in the sintering process and further increasing the binding force between the film layers in the expanded polytetrafluoroethylene film 3.
Meanwhile, the sleeving device 2 further comprises a first connecting part 22 and a second connecting part 23, the first connecting part 22 is connected with the second connecting part 23 through a fastener 24, the fastener 24 can adjust the distance between the first connecting part 22 and the second connecting part 23 so as to adjust the width of the gap 210, and then adjust the inner diameter of the sleeve 21, so that the extrusion force of the sleeve 21 to the expanded polytetrafluoroethylene film 3 (namely, the tension of the sleeve 21) is adjusted so as to adapt to different tension demands and film thickness.
Specifically, the using flow of the expanded polytetrafluoroethylene membrane sintering device is as follows: firstly, winding an expanded polytetrafluoroethylene film 3 on the outer wall of a sintering roller 1 with certain tension to form a layer-by-layer overlapped structure; then sleeving a sleeve 21 of the sleeving device 2 on the sintering roller 1, so that the expanded polytetrafluoroethylene film 3 is clamped between the outer wall of the sintering roller 1 and the inner wall of the sleeve 21; and then the fastening piece 24 is arranged on the first connecting part 22 and the second connecting part 23 of the sleeving device 2, then the fastening piece 24 is adjusted to adjust the tension degree of the sleeve 21, and finally the expanded polytetrafluoroethylene film sintering device is placed into a sintering oven for sintering. When the fastener 24 is adjusted, the smaller the distance between the first connecting part 22 and the second connecting part 23 is, the smaller the width of the gap 210 is, the smaller the inner diameter of the sleeve 21 is, the larger the extrusion force of the sleeve 21 on the expanded polytetrafluoroethylene film 3 is, and the more tightly the film layers in the expanded polytetrafluoroethylene film 3 are bonded; conversely, the larger the distance between the first connecting portion 22 and the second connecting portion 23, the larger the width of the slit 210, and the larger the inner diameter of the sleeve 21, the smaller the pressing force of the sleeve 21 against the expanded polytetrafluoroethylene film 3.
As shown in fig. 1 to 3, as an embodiment, the first connecting portion 22 and the second connecting portion 23 are each of a sheet-like structure, and the first connecting portion 22 and the second connecting portion 23 are each located outside the sleeve 21. One end of the first connecting portion 22 is connected to the first end 211, and the other end of the first connecting portion 22 protrudes outward toward a side away from the center of the sleeve 21; one end of the second connecting portion 23 is connected to the second end 212, and the other end of the second connecting portion 23 protrudes outward toward a side away from the center of the sleeve 21.
As shown in fig. 1 to 3, as an embodiment, the first connection portion 22 and the second connection portion 23 are each of an elongated sheet-like structure (i.e., the first connection portion 22 and the second connection portion 23 are each of a continuous structure), the first connection portion 22 and the second connection portion 23 are each provided extending in the axial direction of the sleeve 21, the length of the first connection portion 22 and the length of the second connection portion 23 are each the same as the length of the sleeve 21, and the first connection portion 22 and the second connection portion 23 are each extended from one end to the opposite end of the sleeve 21. The first connecting portion 22 and the second connecting portion 23 are disposed in parallel and opposite to each other.
As shown in fig. 1 to 3, as an embodiment, a slit 210 is formed in the sleeve 21, and the sleeve 21 is continuously formed at positions other than the slit 210. Of course, in other embodiments, two slits 210 may be provided on the sleeve 21, where the two slits 210 are disposed on two sides of the sleeve 21 along the radial direction of the sleeve 21 (i.e., the two slits 210 divide the sleeve 21 into two semi-cylindrical structures), and each slit 210 is provided with a first connecting portion 22 and a second connecting portion 23, so as to facilitate the sleeve 21 being sleeved on the sintering roller 1 in some cases.
As shown in fig. 1 to 3, as an embodiment, the sleeve 21, the first connection portion 22, and the second connection portion 23 are integrally formed, and the sleeve 21, the first connection portion 22, and the second connection portion 23 may be integrally formed by bending. Of course, in other embodiments, the sleeve 21, the first connecting portion 22 and the second connecting portion 23 may be formed as separate structures, and the first connecting portion 22 and the second connecting portion 23 and the sleeve 21 may be fixed by welding.
As shown in fig. 1 to 3, as an embodiment, the fastening member 24 is a bolt, and bolt holes 200 through which the bolt passes are provided in both the first connecting portion 22 and the second connecting portion 23. In use, bolts are first installed in the bolt holes 200 on the first and second connection parts 22 and 23, and then the bolts are tightened and the torque of the bolts (the torque of the bolts is 1 to 20n·m, preferably 2 to 10n·m) is adjusted, thereby adjusting the tension of the sleeve 21. Of course, in other embodiments, the fastener 24 may be a clamping device, and the tightness of the sleeve 21 is adjusted by adjusting the clamping force of the clamping device on the first connecting portion 22 and the second connecting portion 23.
As an embodiment, the number of the fasteners 24 is plural, the first connecting portion 22 and the second connecting portion 23 are connected by the fasteners 24, and the fasteners 24 are arranged at regular intervals along the axial direction of the sleeve 21 (i.e., in this embodiment, the first connecting portion 22 and the second connecting portion 23 are each provided with a plurality of bolt holes 200, the plurality of bolt holes 200 are arranged at regular intervals along the axial direction of the sleeve 21, and the bolts are arranged in the respective bolt holes 200). By uniformly arranging the fasteners 24 at intervals, the stress at each position of the first connecting portion 22 and the second connecting portion 23 is ensured to be uniform, namely, the same interval between each position of the first connecting portion 22 and each position of the second connecting portion 23 is ensured, and the tension at each position of the sleeve 21 is further kept consistent.
As one embodiment, the distance between two adjacent fasteners 24 is 3cm to 10cm (i.e., in this example, the distance between adjacent bolt holes 200 is 3cm to 10 cm).
As an embodiment, the sleeve 21 is made of a metal material, so that it has good heat conducting property, structural strength and elastic restoring capability.
As an embodiment, the sleeve 21 is made of stainless steel material, but other metal materials, such as nickel, nickel-chromium, etc., may be used.
As one embodiment, the thickness of the sleeve 21 is greater than or equal to 1mm.
As an embodiment, the inner diameter of the sleeve 21 in the initial state (i.e., in a natural state in which the sleeve 21 has not been subjected to an external force) is smaller than or equal to the outer diameter of the sintering roller 1 (preferably, the inner diameter of the sleeve 21 in the initial state is equal to the outer diameter of the sintering roller 1). Because the sleeve 21 has certain elasticity, because the inner diameter of the sleeve 21 is smaller than or equal to the outer diameter of the sintering roller 1, after the sleeve 21 is sleeved on the sintering roller 1, the inner diameter of the sleeve 21 can be slightly increased to generate elastic deformation, and the sleeve 21 can tightly hoop the expanded polytetrafluoroethylene film 3 on the sintering roller 1 under the action of elastic restoring force, so that a better compacting effect is achieved.
As an embodiment, the length of the sleeve 21 is less than or equal to the length of the sintering roller 1 (preferably, the length of the sleeve 21 is equal to the length of the sintering roller 1) to avoid interference of the sleeve 21 with other devices by extending out of both ends of the sintering roller 1. Meanwhile, the length of the sleeve 21 is greater than the width of the expanded polytetrafluoroethylene film 3 so that the sleeve 21 can completely cover the expanded polytetrafluoroethylene film 3.
As shown in fig. 1 and 2, the sintering roller 1 is also made of a stainless material as an embodiment. The sintering roll 1 is provided at both ends with connection shafts 11, which connection shafts 11 are used for mounting the sintering roll 1 to a laminator (not shown) during winding up and for mounting the sintering roll 1 in a sintering oven (not shown) during sintering.
As shown in fig. 1 to 3, as an embodiment, the method for using the expanded polytetrafluoroethylene film sintering device comprises the following steps:
(1) Unreeling the expanded polytetrafluoroethylene film 3 to a film laminating machine (not shown);
(2) Hoisting the sintering roller 1 to a laminating machine to roll the expanded polytetrafluoroethylene film 3, and cleaning the surface of the sintering roller 1;
(3) Setting parameters of a film laminating machine, wherein the film laminating speed is 10m/min, and the film laminating tension is 0-60N, preferably 5-30N; then starting a film laminating machine to enable the expanded polytetrafluoroethylene film 3 to be wound on the sintering roller 1 with a certain tension;
(4) After the film coating is finished (namely, after a certain number of circles of expanded polytetrafluoroethylene films 3 are wound on the sintering roller 1), the film coating machine is stopped; then the sintering roller 1 is moved to an oven bracket;
(5) Sleeving a sleeve 21 of the sleeving device 2 on the sintering roller 1, so that the expanded polytetrafluoroethylene film 3 is clamped between the outer wall of the sintering roller 1 and the inner wall of the sleeve 21; the bolts (i.e. the fasteners 24) are arranged on the first connecting part 22 and the second connecting part 23 of the sleeving device 2 and locked, and the torque of the adjusting bolts is 1-20 N.m, preferably 2-10 N.m, so as to adjust the tension of the sleeve 21;
(6) The sintering roller 1 is placed in a sintering oven (not shown) for sintering;
(7) Setting parameters of a sintering oven, wherein the sintering temperature is 380 ℃ (the sintering temperature is higher than the melting temperature of the expanded polytetrafluoroethylene film), the sintering time is 8H, and starting the sintering oven for heating;
(8) Stopping the sintering oven after sintering is completed, opening the sintering oven after the temperature of the sintering oven is reduced to 60 ℃, taking out the sintering oven from the sintering roller 1, and then taking down the sleeving device 2 from the sintering roller 1; the expanded polytetrafluoroethylene film 3 on the sintering roller 1 is cut to obtain a complete expanded polytetrafluoroethylene plate, and then the interlayer peeling strength (namely the peeling strength between film layers) of the expanded polytetrafluoroethylene plate is tested.
According to the expanded polytetrafluoroethylene film sintering device provided by the embodiment of the utility model, the sleeve connecting device 2 is arranged, the sleeve connecting device 2 comprises the sleeve 21, the sleeve 21 is sleeved on the sintering roller 1, and the expanded polytetrafluoroethylene film 3 can be clamped between the outer wall of the sintering roller 1 and the inner wall of the sleeve 21, so that the film covering tension between the film layers in the expanded polytetrafluoroethylene film 3 is kept, the film layers are tightly attached, air can be isolated from contacting with the expanded polytetrafluoroethylene film 3, and the problems of bubbles, bulges, layering, uneven thickness, poor binding force between the film layers and the like of the expanded polytetrafluoroethylene film 3 in the sintering process are avoided or improved. Meanwhile, as the sleeve 21 is covered on the expanded polytetrafluoroethylene film 3 and the sleeve 21 is made of a heat conducting material, when in sintering, the sleeve 21 is heated by the sintering oven, and then the expanded polytetrafluoroethylene film 3 is heated by the sleeve 21, the heating uniformity can be improved, so that the deformation of the expanded polytetrafluoroethylene film 3 in the sintering process is greatly reduced, and the binding force between the film layers in the expanded polytetrafluoroethylene film 3 is further increased.
Meanwhile, the sleeving device 2 further comprises a first connecting part 22 and a second connecting part 23, the first connecting part 22 is connected with the second connecting part 23 through a fastening piece 24, the fastening piece 24 can adjust the distance between the first connecting part 22 and the second connecting part 23 so as to adjust the width of the gap 210, and then adjust the inner diameter of the sleeve 21, so that the extrusion force of the sleeve 21 on the expanded polytetrafluoroethylene film 3 is adjusted to adapt to different tension demands and film thickness.
Example 1
A sintering manufacturing method of an expanded polytetrafluoroethylene plate comprises the following steps:
(1) Unreeling the expanded polytetrafluoroethylene film to a film laminating machine;
(2) Hoisting the sintering roller to a laminating machine to roll the expanded polytetrafluoroethylene film, and cleaning the surface of the sintering roller;
(3) Setting parameters of a film laminating machine, wherein the film laminating speed is 10m/min, and the film laminating tension is 8N; then starting a film laminating machine to enable the expanded polytetrafluoroethylene film to be wound on a sintering roller with a certain tension;
(4) After the film coating is finished, stopping the film coating machine; then the sintering roller is moved to an oven bracket;
(5) Sleeving a sleeve of the sleeving device on the sintering roller, mounting bolts on a first connecting part and a second connecting part of the sleeving device, locking the bolts, and adjusting the torque of the bolts to be 3 N.m so as to adjust the tension of the sleeve;
(6) Placing the sintering roller into a sintering oven for sintering;
(7) Setting parameters of a sintering oven, wherein the sintering temperature is 380 ℃, the sintering time is 8H, and starting the sintering oven to heat;
(8) Stopping the sintering oven after sintering is completed, opening the baking oven after the temperature of the sintering oven is reduced to 60 ℃, taking out the sintering oven from the sintering roller, and then taking down the sleeving device from the sintering roller; and cutting the expanded polytetrafluoroethylene film on the sintering roller to obtain a complete expanded polytetrafluoroethylene plate. The expanded polytetrafluoroethylene sheet was tested for interlayer peel strength of 0.18kN/m.
Example two
A sintering manufacturing method of an expanded polytetrafluoroethylene plate comprises the following steps:
(1) Unreeling the expanded polytetrafluoroethylene film to a film laminating machine;
(2) Hoisting the sintering roller to a laminating machine to roll the expanded polytetrafluoroethylene film, and cleaning the surface of the sintering roller;
(3) Setting parameters of a film laminating machine, wherein the film laminating speed is 10m/min, and the film laminating tension is 23N; then starting a film laminating machine to enable the expanded polytetrafluoroethylene film to be wound on a sintering roller with a certain tension;
(4) After the film coating is finished, stopping the film coating machine; then the sintering roller is moved to an oven bracket;
(5) Sleeving a sleeve of the sleeving device on the sintering roller, mounting bolts on a first connecting part and a second connecting part of the sleeving device, locking the bolts, and adjusting the torque of the bolts to be 8 N.m so as to adjust the tension of the sleeve;
(6) Placing the sintering roller into a sintering oven for sintering;
(7) Setting parameters of a sintering oven, wherein the sintering temperature is 380 ℃, the sintering time is 8H, and starting the sintering oven to heat;
(8) Stopping the sintering oven after sintering is completed, opening the baking oven after the temperature of the sintering oven is reduced to 60 ℃, taking out the sintering oven from the sintering roller, and then taking down the sleeving device from the sintering roller; and cutting the expanded polytetrafluoroethylene film on the sintering roller to obtain a complete expanded polytetrafluoroethylene plate. The expanded polytetrafluoroethylene sheet was tested for interlayer peel strength of 0.32kN/m.
Example III
A sintering manufacturing method of an expanded polytetrafluoroethylene plate comprises the following steps:
(1) Unreeling the expanded polytetrafluoroethylene film to a film laminating machine;
(2) Hoisting the sintering roller to a laminating machine to roll the expanded polytetrafluoroethylene film, and cleaning the surface of the sintering roller;
(3) Setting parameters of a film laminating machine, wherein the film laminating speed is 10m/min, and the film laminating tension is 15N; then starting a film laminating machine to enable the expanded polytetrafluoroethylene film to be wound on a sintering roller with a certain tension;
(4) After the film coating is finished, stopping the film coating machine; then the sintering roller is moved to an oven bracket;
(5) Sleeving a sleeve of the sleeving device on the sintering roller, mounting bolts on a first connecting part and a second connecting part of the sleeving device, locking the bolts, and adjusting the torque of the bolts to be 5 N.m so as to adjust the tension of the sleeve;
(6) Placing the sintering roller into a sintering oven for sintering;
(7) Setting parameters of a sintering oven, wherein the sintering temperature is 380 ℃, the sintering time is 8H, and starting the sintering oven to heat;
(8) Stopping the sintering oven after sintering is completed, opening the baking oven after the temperature of the sintering oven is reduced to 60 ℃, taking out the sintering oven from the sintering roller, and then taking down the sleeving device from the sintering roller; and cutting the expanded polytetrafluoroethylene film on the sintering roller to obtain a complete expanded polytetrafluoroethylene plate. The expanded polytetrafluoroethylene sheet was tested for interlayer peel strength of 0.25kN/m.
The foregoing is merely illustrative embodiments of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present utility model, and the utility model should be covered. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.
Claims (10)
1. The sintering device for the expanded polytetrafluoroethylene film is characterized by comprising a cylindrical sintering roller (1) and a sleeving device (2), wherein the sintering roller (1) is used for winding the expanded polytetrafluoroethylene film (3); the sleeving device (2) comprises a cylindrical sleeve (21), a first connecting part (22) and a second connecting part (23), wherein the sleeve (21) is sleeved on the sintering roller (1) so as to clamp the expanded polytetrafluoroethylene film (3) between the outer wall of the sintering roller (1) and the inner wall of the sleeve (21), and the sleeve (21) is made of a heat conducting material; a gap (210) is formed in the sleeve (21), and the gap (210) penetrates through the sleeve (21) along the axial direction of the sleeve (21); the two ends of the sleeve (21) at the position of the gap (210) are respectively provided with a first end (211) and a second end (212), the first connecting part (22) and the second connecting part (23) are respectively connected with the first end (211) and the second end (212), and the first connecting part (22) and the second connecting part (23) are arranged at intervals; the first connecting part (22) is connected with the second connecting part (23) through a fastener (24), and the fastener (24) is used for adjusting the distance between the first connecting part (22) and the second connecting part (23) so as to adjust the width of the gap (210) and further adjust the inner diameter of the sleeve (21).
2. The expanded polytetrafluoroethylene film sintering device according to claim 1, wherein the first connecting portion (22) and the second connecting portion (23) are both sheet-like structures, and the first connecting portion (22) and the second connecting portion (23) are both located outside the sleeve (21); one end of the first connecting part (22) is connected with the first end (211), and the other end of the first connecting part (22) extends outwards towards one side far away from the center of the sleeve (21); one end of the second connecting part (23) is connected with the second end (212), and the other end of the second connecting part (23) extends outwards towards one side far away from the center of the sleeve (21).
3. The expanded polytetrafluoroethylene film sintering device according to claim 2, wherein the first connecting portion (22) and the second connecting portion (23) are each of a strip-shaped sheet-like structure, the first connecting portion (22) and the second connecting portion (23) are each provided to extend in an axial direction of the sleeve (21), and the first connecting portion (22) and the second connecting portion (23) are provided to be parallel and opposite to each other.
4. The expanded polytetrafluoroethylene membrane sintering device according to claim 1, wherein the sleeve (21) is provided with a slit (210), and the sleeve (21) is provided with a continuous structure at positions other than the slit (210).
5. The expanded polytetrafluoroethylene film sintering apparatus according to claim 1, wherein the sleeve (21), the first connecting portion (22), and the second connecting portion (23) are of an integral structure.
6. The expanded polytetrafluoroethylene membrane sintering device according to claim 1, wherein the fastener (24) is a bolt, and bolt holes (200) through which the bolt passes are provided in both the first connecting portion (22) and the second connecting portion (23).
7. The expanded polytetrafluoroethylene membrane sintering device according to claim 1, wherein the number of the fasteners (24) is plural, the first connecting portion (22) and the second connecting portion (23) are connected by plural fasteners (24), and the plural fasteners (24) are arranged at regular intervals in the axial direction of the sleeve (21).
8. The expanded polytetrafluoroethylene film sintering apparatus according to claim 7, wherein a distance between adjacent two of said fasteners (24) is 3cm to 10cm.
9. The expanded polytetrafluoroethylene film sintering apparatus according to claim 1, wherein the length of the sleeve (21) is less than or equal to the length of the sintering roll (1).
10. An expanded polytetrafluoroethylene membrane sintering apparatus according to any one of claims 1-9, wherein said sleeve (21) is made of stainless steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322545289.2U CN220946746U (en) | 2023-09-19 | 2023-09-19 | Expanded polytetrafluoroethylene membrane sintering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322545289.2U CN220946746U (en) | 2023-09-19 | 2023-09-19 | Expanded polytetrafluoroethylene membrane sintering device |
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| Publication Number | Publication Date |
|---|---|
| CN220946746U true CN220946746U (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322545289.2U Active CN220946746U (en) | 2023-09-19 | 2023-09-19 | Expanded polytetrafluoroethylene membrane sintering device |
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| Country | Link |
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| CN (1) | CN220946746U (en) |
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