CN119490103B - A turn-up device for Teflon guipure - Google Patents
A turn-up device for Teflon guipure Download PDFInfo
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- CN119490103B CN119490103B CN202510082667.9A CN202510082667A CN119490103B CN 119490103 B CN119490103 B CN 119490103B CN 202510082667 A CN202510082667 A CN 202510082667A CN 119490103 B CN119490103 B CN 119490103B
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- 239000004809 Teflon Substances 0.000 title claims abstract description 83
- 229920006362 Teflon® Polymers 0.000 title claims abstract description 83
- 238000004804 winding Methods 0.000 claims abstract description 60
- 239000007788 liquid Substances 0.000 claims description 49
- 238000003860 storage Methods 0.000 claims description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000005096 rolling process Methods 0.000 claims description 15
- 230000007306 turnover Effects 0.000 abstract description 11
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 7
- 206010066054 Dysmorphism Diseases 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 208000035874 Excoriation Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Catching Or Destruction (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a turnover device for a Teflon net belt, which relates to the field of material transmission, and comprises a mounting bracket, wherein the upper end of the mounting bracket is provided with a turnover mechanism for turning the Teflon net belt, the turnover mechanism comprises a turnover frame, the turnover frame is rotatably arranged at the upper end of the mounting bracket, the inner wall of the turnover frame is rotatably provided with a limiting frame for placing the Teflon net belt, the side end of the limiting frame is provided with a limiting mechanism for expanding the Teflon net belt and automatically controlling the tension, and the upper end of the mounting bracket, which is far away from the turnover mechanism, is provided with a winding mechanism for winding the Teflon net belt.
Description
Technical Field
The invention relates to the field of material transmission, in particular to a turnup device for a Teflon net belt.
Background
The Teflon net belt is prepared by taking polytetrafluoroethylene (commonly known as plastic king) emulsion as a raw material and dipping high-performance glass fiber mesh cloth, is a novel high-performance and multipurpose composite material product, and is widely applied to the fields of papermaking, food, environmental protection, printing and dyeing, clothing, chemical industry, glass, medicine, electronics, insulation, grinding wheel slicing, machinery and the like due to the excellent properties of the novel high-performance and multipurpose composite material product.
Through the mass retrieval, found that prior art publication number is CN109399151A, disclosed a turn-up device for Teflon guipure, including base, support body, control box and siren, support body bottom is provided with the base, support body one side is provided with the control box, be provided with on the control box the siren, support body keeps away from one side of base is provided with the supporting seat, supporting seat one side is provided with the gear box, the gear box is kept away from one side of supporting seat is provided with servo motor, servo motor one side is provided with the encoder, be provided with the gear wheel in the gear box, gear wheel one side is provided with the pinion. The invention has the beneficial effects of reasonable structure, convenient use, simple operation and higher practicability, and the rotating frame and the servo motor are designed, so that the rotating frame and the servo motor have higher automation degree, higher overturning efficiency and better economy, and the safety performance of the device is improved through the designs of the supporting platform, the V-shaped platform and the servo motor.
In the process of overturning the Teflon mesh belt by the existing Teflon mesh belt production and transmission, the Teflon mesh belt needs to be fixed, the Teflon mesh belt is prevented from moving, but the fixed structure of the Teflon mesh belt is too loose, so that the mesh belt can slip or deviate, the risk of abrasion and fracture of the Teflon mesh belt can be increased due to too tight, the tension of the Teflon mesh belt is difficult to control during overturning, and therefore, the overturning device for the Teflon mesh belt is provided based on the searching and combining the existing problems.
Disclosure of Invention
The invention aims to provide a turnup device for a Teflon net belt, which aims to solve the problem that the tension is difficult to control when the Teflon net belt is turned over in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The utility model provides a turn-up device for Teflon guipure, includes the installing support, the upper end of installing support is provided with the tilting mechanism that overturns to Teflon guipure, tilting mechanism includes the roll-over stand, just the roll-over stand rotates and installs in the installing support upper end, the roll-over stand inner wall rotates and is provided with the spacing that places Teflon guipure, the side of spacing is provided with the spacing with Teflon guipure and carries out automatic control to the tension size, the upper end that tilting mechanism was kept away from to the installing support is provided with the winding mechanism that carries out the rolling to Teflon guipure.
Further, a hydraulic telescopic rod is fixedly installed on the outer wall of the roll-over stand, a liquid storage tank is fixedly installed at the side end, close to the hydraulic telescopic rod, of the installation support, a hydraulic pump is fixedly installed in the liquid storage tank, a hydraulic pipe is fixedly installed at the output end of the hydraulic pump, and the hydraulic pipe is fixedly installed at the input end of the hydraulic pump.
Further, the output end fixed mounting of hydraulic telescoping rod has the control rope, the one end fixed mounting that hydraulic telescoping rod was kept away from to the control rope has the fixed block, just fixed block fixed mounting is in the one end of locating part, the side fixed mounting of locating part has the installation pole, it is equipped with the installation cover to rotate the cover on the outer wall of installation pole.
Further, the limiting mechanism comprises limiting cylinders, the limiting cylinders are symmetrically arranged on the inner wall of the limiting frame, a control cylinder is fixedly arranged on the inner wall, close to the limiting cylinders, of the limiting frame, a control piston is slidably arranged in the inner wall of the control cylinder, a control rod is fixedly arranged at one end of the control piston, and a control tube is fixedly arranged at the input end of the control cylinder.
Further, one end fixed mounting that control section of thick bamboo was kept away from to the control lever has the control frame, the control circle is installed to the both ends symmetry of control frame, fixed mounting has control spring on the inner wall that the spacing is close to spacing section of thick bamboo, the one end fixed mounting who keeps away from the spacing of control spring has the installation circle, the installation circle is kept away from the one end rotation of control spring and is installed the retainer plate, and the upper end rotate on the outer wall of retainer plate and install a plurality of fixation clamps.
Further, the fixed clamp is kept away from the equal fixed mounting of one end of retainer plate and has the dwang, the one end fixed mounting that the installation circle is close to the dwang has the dysmorphism circle, the one end that the dwang is close to the dysmorphism circle rotates and installs the wheel that rolls, just the wheel laminating is at the edge of dysmorphism circle.
Further, a liquid storage cylinder is fixedly arranged on the inner wall of the liquid storage tank, a liquid storage piston rod is slidably arranged on the inner wall of the liquid storage cylinder, an air bag ring is fixedly arranged at the lower end of the liquid storage piston rod, and the control tube is fixedly arranged at the output end of the liquid storage cylinder.
Further, the winding mechanism comprises a winding frame, the winding frame is slidably mounted at the upper end of the mounting bracket, a winding motor is fixedly mounted at the upper end of the winding frame, a winding drum is fixedly mounted at the output end of the winding motor, a supporting drum is fixedly mounted at one end of the mounting bracket, which is close to the winding frame, a supporting piston rod is slidably arranged in the supporting drum, one end of the supporting piston rod, which is far away from the mounting bracket, is fixedly mounted at the side end of the winding frame, a water pipe is fixedly mounted at the output end of the supporting drum, and the water pipe is fixedly mounted at the side end of the storage tank.
Compared with the prior art, the invention has the beneficial effects that:
1. According to the invention, when the Teflon net belt is turned over, the opening force of the Teflon net belt is controlled by controlling the distance between the devices for fixing the Teflon net belt, so that the tension of the Teflon net belt when the Teflon net belt is turned over is controlled within a proper range, and the Teflon net belt is prevented from being damaged in the transmission process due to overlarge or undersize tension;
2. according to the invention, when the Teflon net belt is wound, the winding frame moves to push the supporting piston rod to move, and the liquid in the supporting cylinder is transferred into the liquid storage box through the water pipe, so that the liquid level in the liquid storage box rises again, and the damage caused by insufficient tension of the Teflon net belt due to the change of winding speed is avoided.
Drawings
FIG. 1 is a schematic diagram of the main structure of the present invention;
FIG. 2 is a schematic view of the structure of the roll-over stand according to the present invention;
FIG. 3 is a schematic view of a limiting frame according to the present invention;
FIG. 4 is a schematic view of a limiting cylinder according to the present invention;
FIG. 5 is a schematic view of the structure of the control frame according to the present invention;
FIG. 6 is a schematic view of a fixing clip according to the present invention;
FIG. 7 is a schematic diagram of the structure of the liquid storage tank in the present invention;
fig. 8 is a schematic structural view of a winding drum in the present invention.
1, A mounting bracket;
2. The device comprises a turnover mechanism, a turnover frame, a 202, a limiting frame, a 203, a hydraulic telescopic rod, a 204, a liquid storage box, a 205, a hydraulic pump, a 206, a hydraulic pipe, a 207, a control rope, a 208 and a guide frame;
209. The device comprises a fixed block, a mounting rod, a mounting sleeve, a telescopic spring and a fixing block, wherein the fixed block is provided with a fixing hole;
3. A limiting mechanism; 301, a limiting cylinder, 302, a control cylinder, 303, a control piston, 304, a control rod, 305, a control tube, 306, a control frame, 307, a control ring, 308 and a control spring;
309. mounting rings 310, fixing rings 311, fixing clamps 312, winding springs 313, fixing grooves 314, fixing sleeves 315, rotating rods 316, special-shaped rings 317 and rolling wheels;
318. 319 parts of liquid storage cylinder, 319 parts of liquid storage piston rod, 320 parts of air bag ring;
4. Winding mechanism, 401, winding frame, 402, winding motor, 403, winding drum, 404, supporting drum, 405, supporting piston rod, 406, reset spring, 407, water pipe.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-8, a turnup device for teflon mesh belt comprises a mounting bracket 1, wherein a turnup mechanism 2 for turning over the teflon mesh belt is arranged at the upper end of the mounting bracket 1, the turnup mechanism 2 comprises a turnup frame 201, the turnup frame 201 is rotatably arranged at the upper end of the mounting bracket 1, a limit frame 202 for placing the teflon mesh belt is rotatably arranged on the inner wall of the turnup frame 201, a limit mechanism 3 for opening the teflon mesh belt and automatically controlling the tension is arranged at the side end of the limit frame 202, specifically, the limit mechanism 3 enables the teflon mesh belt to rotate, avoid pulling the excessive dynamics of teflon guipure border position when avoiding being close to each other between the teflon guipure, lead to the teflon guipure to damage, the upper end that tilting mechanism 2 was kept away from to installing support 1 is provided with the winding mechanism 4 that carries out the rolling to the teflon guipure, and specifically, winding mechanism 4 is movable, and winding mechanism 4 is in coiling teflon guipure in-process, and certain pulling force also exists to teflon guipure upset at the winding speed, thereby has reduced the pulling force that produces when the teflon guipure of upset when the winding mechanism 4 of removal pulls the force.
Referring to fig. 1-7, a hydraulic telescopic rod 203 is fixedly installed on an outer wall of a roll-over stand 201, a liquid storage tank 204 is fixedly installed at a side end of a mounting bracket 1, which is close to the hydraulic telescopic rod 203, a hydraulic pump 205 is fixedly installed inside the liquid storage tank 204, a hydraulic pipe 206 is fixedly installed at an output end of the hydraulic pump 205, and the hydraulic pipe 206 is fixedly installed at an input end of the hydraulic pump 205.
Referring to fig. 1-3, a control rope 207 is fixedly mounted at an output end of a hydraulic telescopic rod 203, a guide frame 208 is arranged at an upper end of a roll-over stand 201, which is close to the control rope 207, the guide frame 208 prevents the control rope 207 from being damaged due to contact friction with the roll-over stand 201, a fixed block 209 is fixedly mounted at one end of the control rope 207, which is far away from the hydraulic telescopic rod 203, and the fixed block 209 is fixedly mounted at one end of a limiting frame 202, specifically, when the hydraulic telescopic rod 203 is started, the hydraulic telescopic rod 203 drives the control rope 207 to start moving, so that the limiting frame 202 starts moving, a mounting rod 210 is fixedly mounted at a side end of the limiting frame 202, a mounting sleeve 211 is rotatably sleeved on an outer wall of the mounting rod 210, a telescopic spring 212 is fixedly mounted between the mounting sleeve 211 and the mounting bracket 1, and when the telescopic spring 212 mounted between the limiting frame 202 and the mounting bracket 1 enables the control rope 207 not to pull the limiting frame 202 to rotate any more, the limiting frame 202 is more convenient to restore the original shape.
Referring to fig. 1-5, the limiting mechanism 3 includes a limiting cylinder 301, the limiting cylinder 301 is symmetrically installed on an inner wall of the limiting frame 202, a control cylinder 302 is fixedly installed on an inner wall of the limiting frame 202, which is close to the limiting cylinder 301, a control piston 303 is slidably installed in an inner wall of the control cylinder 302, a control rod 304 is fixedly installed at one end of the control piston 303, and a control tube 305 is fixedly installed at an input end of the control cylinder 302, specifically, when the control tube 305 starts to transmit liquid into the control cylinder 302, the liquid in the control cylinder 302 increases, the control piston 303 is pushed to start moving, and the control rod 304 starts to move for adjustment.
Referring to fig. 1-6, a control frame 306 is fixedly mounted at one end of a control rod 304 far away from a control cylinder 302, a control ring 307 is symmetrically mounted at two ends of the control frame 306, a control spring 308 is fixedly mounted on the inner wall of the limit frame 202 close to the limit cylinder 301, when the control spring 308 contracts the teflon mesh belt, the control spring 308 is pulled, the control spring 308 is extended, tension of the teflon mesh belt is kept in a proper range, a mounting ring 309 is fixedly mounted at one end of the control spring 308 far away from the limit frame 202, a fixing ring 310 is rotatably mounted at one end of the mounting ring 309 far away from the control spring 308, a plurality of fixing clamps 311 are rotatably mounted on the outer wall of the fixing ring 310 at the upper end, when the teflon mesh belt is loosened, the fixing clamps 311 are contracted when the teflon mesh belt is pushed, so that the teflon mesh belt is expanded when the teflon mesh belt passes through the limit cylinder 301, a winding spring 312 is arranged at a rotating joint of the fixing clamp 311, the fixing ring 311 can press the teflon mesh belt to be attached to the lower surface of the limit cylinder 301, a plurality of fixing rings 314 are rotatably mounted on the fixing rings 310, and the fixing rings are fixed at the fixing rings 313 are not attached to the lower end of the fixing ring 310, and the fixing rings are fixed at the fixing rings 313.
Referring to fig. 1-7, a rotating rod 315 is fixedly mounted at one end of the fixing clip 311 far away from the fixing ring 310, a special-shaped ring 316 is fixedly mounted at one end of the mounting ring 309 close to the rotating rod 315, a rolling wheel 317 is rotatably mounted at one end of the rotating rod 315 close to the special-shaped ring 316, the rolling wheel 317 is attached to the edge of the special-shaped ring 316, specifically, when the fixing ring 310 rotates along with the limiting cylinder 301, one end of the fixing clip 311 is provided with the rolling wheel 317 to start moving along the edge of the special-shaped ring 316, after the fixing clip 311 moves to the teflon mesh belt position, the winding spring 312 pushes the fixing clip 311 to clamp the teflon mesh belt, and after the fixing clip 311 moves a certain distance, the fixing clip 311 is opened and is not contacted with the teflon mesh belt, so that the teflon mesh belt is always attached to the surface of the limiting cylinder 301.
Referring to fig. 1-7, a liquid storage cylinder 318 is fixedly mounted on an inner wall of the liquid storage tank 204, a liquid storage piston rod 319 is slidably mounted on the inner wall of the liquid storage cylinder 318, an air bag ring 320 is fixedly mounted at a lower end of the liquid storage piston rod 319, the air bag ring 320 floats on a liquid surface in the liquid storage tank 204, and a control tube 305 is fixedly mounted at an output end of the liquid storage cylinder 318, so that when the air bag ring 320 starts to move upwards, liquid in the liquid storage cylinder 318 is transferred to the control cylinder 302 through the control tube 305, and the control piston 303 pushes the control rod 304 to move, so that the control frame 306 moves.
Referring to fig. 1-8, the winding mechanism 4 includes a winding frame 401, the winding frame 401 is slidably mounted at the upper end of the mounting frame 1, a winding motor 402 is fixedly mounted at the upper end of the winding frame 401, a winding drum 403 is fixedly mounted at the output end of the winding motor 402, specifically, when the teflon net belt needs to be wound, the winding motor 402 is started to enable the winding drum 403 to start rotating to roll the teflon net belt, a supporting drum 404 is fixedly mounted at one end of the mounting frame 1 close to the winding frame 401, a supporting piston rod 405 is slidably arranged in the supporting drum 404, one end of the supporting piston rod 405 far from the mounting frame 1 is fixedly mounted at the side end of the winding frame 401, specifically, when the rotation speed of the winding drum 403 is increased, the teflon net belt is pushed by the winding frame 401 to move, so that the winding speed of the teflon net belt is adjustable, a reset spring 406 is fixedly mounted between the winding frame 401 and the mounting frame 1, and the reset spring 406 is sleeved on the outer wall of the supporting drum 404, when the winding speed is increased, the reset spring 406 can buffer the reset spring 406, the water is prevented from flowing into the water tank 204 through the water tank 204 when the water tank 204 is fixedly mounted at the side of the water tank 407, and the water tank is prevented from being increased, and the water tank 204 is kept from flowing in the water tank is fixedly mounted in the water tank.
After the Teflon net belt is placed in the turnover mechanism 2, when the Teflon net belt needs to be turned over, the hydraulic pump 205 is started, the hydraulic telescopic rod 203 starts to work and shrink, the control rope 207 pulls the limiting frame 202 to start rotating, the turnover frame 201 is driven to rotate, the Teflon net belt is turned over, the winding motor 402 is started, and therefore the Teflon net belt is turned over and wound more conveniently;
When the Teflon net belt is turned over, liquid in the hydraulic telescopic rod 203 is transmitted to the liquid storage tank 204 through the hydraulic pipe 206, so that the liquid level in the liquid storage tank 204 rises, the air bag ring 320 starts to rise, the liquid in the liquid storage cylinder 318 is transmitted to the control cylinder 302 through the control pipe 305 by the liquid storage piston rod 319, the control rod 304 pushes the control frame 306 to move, and therefore the Teflon net belt is prevented from being damaged due to the fact that the Teflon net belt is pulled by the fixing clamp 311 to be too strong after the Teflon net belt is turned over;
Meanwhile, the winding speed of the winding motor 402 also has an influence on the tension of the Teflon mesh belt, when the Teflon mesh belt is wound, the winding frame 401 moves to push the supporting piston rod 405 to move, and liquid in the supporting cylinder 404 is transferred into the liquid storage tank 204 through the water pipe 407, so that the liquid level in the liquid storage tank 204 rises again, and the Teflon mesh belt is prevented from being damaged due to insufficient tension caused by the change of the winding speed.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art who is skilled in the art to which the present invention pertains should cover the scope of the present invention by equally replacing or changing the technical scheme and the inventive concept thereof.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510082667.9A CN119490103B (en) | 2025-01-20 | 2025-01-20 | A turn-up device for Teflon guipure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510082667.9A CN119490103B (en) | 2025-01-20 | 2025-01-20 | A turn-up device for Teflon guipure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN119490103A CN119490103A (en) | 2025-02-21 |
| CN119490103B true CN119490103B (en) | 2025-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202510082667.9A Active CN119490103B (en) | 2025-01-20 | 2025-01-20 | A turn-up device for Teflon guipure |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112093547A (en) * | 2020-09-22 | 2020-12-18 | 合肥凯琳制冷设备有限公司 | Raw material plate turning device for shell of refrigeration compressor |
| CN216997090U (en) * | 2022-03-14 | 2022-07-19 | 济南御锦铭数控设备有限公司 | Automatic coil winding machine with constant tension control |
| CN118025875A (en) * | 2024-04-11 | 2024-05-14 | 长园新能源材料研究院(广东)有限公司 | A film surface changing mechanism, coating equipment and coating process |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB822803A (en) * | 1954-12-10 | 1959-11-04 | Keelavite Co Ltd | Apparatus for winding or unwinding a length of flexible material |
| CN211998007U (en) * | 2020-04-22 | 2020-11-24 | 江苏永盛氟塑新材料有限公司 | Production of special fluorine dragon high temperature cloth is with high-efficient collection equipment that rolls over |
| CN216710491U (en) * | 2022-02-17 | 2022-06-10 | 绵竹市红森玻璃制品有限责任公司 | Special tool for net take-up belt |
| CN220925845U (en) * | 2023-10-09 | 2024-05-10 | 浙江金洲管道工业有限公司 | Steel belt torsion device for producing high-frequency straight welded pipe |
| CN221419778U (en) * | 2023-11-15 | 2024-07-26 | 开封超力电器有限公司 | Automatic turnover mechanism of fan installation equipment |
-
2025
- 2025-01-20 CN CN202510082667.9A patent/CN119490103B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112093547A (en) * | 2020-09-22 | 2020-12-18 | 合肥凯琳制冷设备有限公司 | Raw material plate turning device for shell of refrigeration compressor |
| CN216997090U (en) * | 2022-03-14 | 2022-07-19 | 济南御锦铭数控设备有限公司 | Automatic coil winding machine with constant tension control |
| CN118025875A (en) * | 2024-04-11 | 2024-05-14 | 长园新能源材料研究院(广东)有限公司 | A film surface changing mechanism, coating equipment and coating process |
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| CN119490103A (en) | 2025-02-21 |
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