CN214448456U - Thermal shrinkage pipe expanding equipment - Google Patents
Thermal shrinkage pipe expanding equipment Download PDFInfo
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- CN214448456U CN214448456U CN202023347910.7U CN202023347910U CN214448456U CN 214448456 U CN214448456 U CN 214448456U CN 202023347910 U CN202023347910 U CN 202023347910U CN 214448456 U CN214448456 U CN 214448456U
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- shrinkable tube
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Abstract
The application relates to a heat shrinkable tube expansion device which comprises a raw material wheel, a heating pool, a negative pressure expansion die, a power roller and an infrared sensor; the raw material wheel is provided with a driving device electrically connected with the infrared sensor; the negative pressure expansion die is provided with an expansion cavity; the expansion cavity is provided with an inlet at one end of the negative pressure expansion mould and an outlet at the other end, and the inlet is arranged below the outlet; the heating pool is arranged between the raw material wheel and the negative pressure expansion mould; the heat-shrinkable tube moves upwards to enter a negative pressure expansion die after passing through the heating pool; the infrared sensor is arranged on the side of the upward movement section of the heat shrinkable tube and can sense the upward movement section; when the infrared sensor cannot sense the upward movement section due to tightness, the driving device is started to drive the raw material wheel to rotate. The infrared inductor is arranged, so that the condition that the heat shrinkable tube is pulled apart or pulled out of cracks is reduced, the sealing performance and other performances of the heat shrinkable tube are improved, and the expansion yield of the heat shrinkable tube is also improved.
Description
Technical Field
The application relates to the field of heat shrink tubes, in particular to expansion equipment for heat shrink tubes.
Background
The heat shrinkable tube is a tube having a high-temperature shrinkage function, is in a glass state at room temperature, is changed into a high-elastic state after being heated, and rapidly shrinks after being cooled. The heat shrinkable tube has excellent characteristics of flame retardance, sealing, softness, insulation and corrosion resistance, and thus is widely used for insulation protection of various wire harnesses, welding spots and inductors and rust prevention and corrosion prevention places of metal tubes and rods. In order to meet various application requirements, heat shrinkable tubes of various sizes are prepared, which requires expansion of the heat shrinkable tubes by an expander.
At present, in a heat shrinkable tube expanding machine in the related art, a raw material wheel is driven to rotate and discharge materials by the traction of a power roller; after the heat shrinkable tube is heated and softened, the heat shrinkable tube is expanded by an expansion die to obtain heat shrinkable tubes of various sizes.
In view of the above-mentioned related technologies, the inventor believes that the raw material wheel is driven to rotate for discharging only by the traction of the power roller, and the raw material wheel may rotate slowly or even not rotate due to insufficient traction force, so that the discharging is not smooth, and the heat shrinkable tube is pulled at two ends to cause defects such as cracks or be broken, thereby affecting the quality and yield of the heat shrinkable tube.
SUMMERY OF THE UTILITY MODEL
In order to reduce the situation of unsmooth discharging and improve the quality and the yield of the heat shrinkable tube, the application provides the heat shrinkable tube expanding equipment.
The application provides a pyrocondensation pipe expansion equipment adopts following technical scheme:
the heat-shrinkable tube expansion equipment comprises a raw material wheel, a heating pool, a negative pressure expansion die, a power roller and an infrared inductor;
the raw material wheel is provided with a driving device electrically connected with the infrared sensor; the power roller is used for driving the heat shrinkable tube to move so as to complete expansion;
the negative pressure expansion die is provided with an expansion cavity; the expansion cavity is provided with an inlet at one end of the negative pressure expansion die and an outlet at the other end, and the inlet is arranged below the outlet;
the heating pool is arranged between the raw material wheel and the negative pressure expansion die; the heat shrinkable tube moves upwards to enter a negative pressure expansion die after passing through the heating pool;
the infrared sensor is arranged on the side of the upward movement section of the heat shrinkable tube and can sense the upward movement section; when the infrared sensor cannot sense the upward movement section due to tightness, the driving device is started to drive the raw material wheel to rotate.
By adopting the technical scheme, when the heat shrinkable tube is pulled due to unsmooth discharge, the upward movement section of the heat shrinkable tube leaves the original position due to tensioning, so that the infrared sensor cannot sense the heat shrinkable tube; the infrared inductor gives the drive arrangement signal this moment, and drive arrangement starts and drive raw materials wheel and rotates to increased extra power, made the blowing smooth and easy, alleviated the condition that the pyrocondensation pipe was dragged by both ends, reduced the condition that the pyrocondensation pipe was pulled apart or pulled out the crackle, improved the quality (like the leakproofness) of the pyrocondensation pipe of expansion, also improved the yield of pyrocondensation pipe expansion.
Optionally, the negative pressure expansion die is cylindrical and comprises an expansion cavity, a vacuum cavity and a cooling pipe; the expansion cavity is a variable inner diameter cavity and comprises a small inner diameter section, a transition section and a large inner diameter section; the small inner diameter section is communicated with an inlet, the large inner diameter section is communicated with an outlet, and the inlet is smaller than the outlet;
the vacuum cavity is of a cylindrical structure with an annular radial section, surrounds the expansion cavity and is communicated with the expansion cavity through a communication hole;
the cooling tube is disposed between the expansion chamber and the vacuum chamber.
By adopting the technical scheme, the diameter of the heat-shrinkable tube is expanded by a negative pressure method; meanwhile, the cooling pipe is arranged to reduce the problem that the heat shrinkable pipe is adhered to the wall of the expansion cavity, so that the defects on the wall of the heat shrinkable pipe are reduced, and the improvement of the performances of the heat shrinkable pipe, such as sealing performance, is facilitated.
Optionally, the vacuum cavity, the expansion cavity and the negative pressure expansion die are coaxially arranged; the communication holes extend along the radial direction of the negative pressure expansion die, and the communication holes are arranged in a plurality and are uniformly distributed.
By adopting the technical scheme, the suction force generated by the vacuum cavity to the expansion cavity is more balanced, so that the expansion of the heat shrinkable tube is more balanced.
Optionally, the cooling tube is spirally wound around the outside of the expansion chamber.
By adopting the technical scheme, the running road strength of the cooling liquid is prolonged, and the cooling effect is improved.
Optionally, a plurality of partition plates with through holes are arranged in the cooling pipe.
Through adopting above-mentioned technical scheme, increased the inside convection current of coolant liquid, improved the inside heat transfer of cooling water, and then improved refrigerated effect.
Optionally, the heating tank includes an upper cover, a tank body and a turning wheel; glycerol is placed in the tank body; the turning wheel is of a cylindrical structure, and the side surface of the turning wheel is formed by a plurality of turning rods which are connected with the two ends of the turning wheel and are uniformly arranged along the circumferential direction of the turning wheel; the turning wheel can rotate around the axis of the turning wheel and is connected with the tank body; the wheel was partially submerged in glycerin.
By adopting the technical scheme, the heat shrinkable tube is heated and softened, and is ready for the next expansion; meanwhile, the arrangement of the turning wheel improves the mixing and heat transfer of liquid in the tank body, and is beneficial to improving the softening effect of the heat-shrinkable tube.
Optionally, the device further comprises a driven roller arranged between the raw material wheel and the heating pool.
Through adopting above-mentioned technical scheme, the driven voller can play the effect of support and direction pyrocondensation pipe for lead the pyrocondensation pipe to the heating pond.
Optionally, the power roller is a pair roller, and a gap between the two rollers is smaller than the diameter of the heat shrink tube; the rear end station of the power roller is provided with a material receiving roller, and the rear end station of the material receiving roller is provided with a material receiving frame.
By adopting the technical scheme, the power roller provides power for the heat shrinkable tube and simultaneously plays a role in flattening the heat shrinkable tube, so that the heat shrinkable tube is convenient to store and transport.
Optionally, a cooling pool is arranged between the power roller and the material receiving roller.
By adopting the technical scheme, the cooling device is used for cooling the heat shrinkable tube.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the infrared sensor is arranged to sense the upwards moving heat shrink tube, so that the situation of unsmooth discharging can be found in time, and the problem is solved by supplementing extra power to the raw material wheel; the condition that the two ends of the heat shrinkable tube are pulled is relieved, and the condition that the heat shrinkable tube is pulled apart or cracks are reduced, so that the sealing performance and other performances of the heat shrinkable tube are improved, and the expansion yield of the heat shrinkable tube is also improved;
2. the arrangement of the cooling pipe reduces the problem that the heat shrinkable pipe is adhered to the wall of the expansion cavity, so that the defects on the wall of the heat shrinkable pipe are reduced, and the improvement of the performances of the heat shrinkable pipe, such as sealing performance, is facilitated;
3. this application turns over the setting of wheel, is favorable to improving the mixed heat transfer of liquid in the cell body, and then improves the softening effect of pyrocondensation pipe.
Drawings
Fig. 1 is a perspective view of a stent according to an embodiment of the present application.
Fig. 2 is a perspective view of another angle of the stent of the embodiments of the present application.
Fig. 3 is an axial sectional view schematically showing a negative pressure expansion die according to an embodiment of the present application.
Fig. 4 is a schematic radial cross-sectional view of a negative pressure expansion die according to an embodiment of the present application.
Fig. 5 is a schematic cross-sectional view of a cooling tube according to an embodiment of the present application.
Fig. 6 is a schematic position diagram of an infrared sensor according to an embodiment of the present application.
Description of reference numerals: 1. a raw material wheel; 11. a drive device; 2. a heating tank; 21. an upper cover; 22. a tank body; 221. a support; 23. turning over the wheel; 231. turning over the rod; 3. expanding the mold under negative pressure; 31. an expansion lumen; 311. a small inner diameter section; 312. a transition section; 313. a large inner diameter section; 314. an inlet; 315. an outlet; 32. a vacuum chamber; 33. a cooling tube; 331. a partition plate; 34. a communicating hole; 35. an air exhaust pipe; 36. a liquid inlet pipe; 37. a liquid outlet pipe; 4. a power roller; 5. an infrared sensor; 6. a driven roller; 7. a material receiving roller; 8. A material receiving frame; 9. a cooling pool; 10. heat shrink tubing; 101. and an upward movement section.
Detailed Description
The present application is described in further detail below with reference to figures 1-6.
Referring to fig. 1, the embodiment of the application discloses a heat shrinkable tube expanding device, which comprises a raw material wheel 1, a driven roller 6, a heating pool 2, a negative pressure expanding die 3, a power roller 4, a cooling pool 9, a material receiving roller 7 and a material receiving frame 8, wherein the raw material wheel 1, the driven roller 6, the heating pool, the negative pressure expanding die, the power roller 4, the cooling pool 9 and the material receiving frame are sequentially arranged from a front end station to a rear end station. An infrared sensor 5 is arranged on the side between the heating pool 2 and the negative pressure expanding die 3.
Referring to fig. 1 and 2, an unexpanded heat shrinkable tube 10 is wound around the raw material wheel 1, and the raw material wheel 1 is provided with a driving device 11 electrically connected to the infrared sensor 5; specifically, the driving device 11 is a motor and can drive the raw material wheel 1 to rotate; the rear end station of the raw material wheel 1 is provided with a driven roller 6 which is a pair of rollers and plays a role in supporting and guiding the heat shrinkable tube 10, and the driven roller is used for guiding the heat shrinkable tube 10 to the heating pool 2.
Referring to fig. 2, the heating tank 2 is horizontally disposed and includes an upper cover 21, a tank body 22 and a turning wheel 23; wherein, the upper cover 21 is covered on the tank body 22 to play a role in reducing heat loss; the top of the upper cover 21 can also be connected with an air pipe to exhaust hot air when the upper cover is overheated. Glycerol and water are placed in the tank body 22, and a heating device is arranged at the bottom of the tank body 22 and used for heating the glycerol and the water so as to soften the heat shrinkable tube 10 and facilitate the subsequent expansion. The turning wheel 23 is of a cylindrical structure, the side surface of the turning wheel is composed of a plurality of turning rods 231 which are uniformly arranged along the circumferential direction of the turning wheel 23, and each turning rod 231 extends along the axial direction of the turning wheel 23 and is connected with two ends of the turning wheel 23; a plurality of turning wheels 23 are arranged along the length direction of the tank body 22, and each turning wheel 23 is transversely connected with the tank body 22; specifically, the centers of the two ends of each turning wheel 23 are respectively connected with the support seats 221 arranged on the tank walls on the two sides of the tank body 22 through a rotating shaft, so that each turning wheel 23 can rotate around the axis thereof and is connected with the tank body 22; at the same time, each wheel 23 is partially immersed in the liquid in the tank 22. The arrangement of the turning wheel 23 can stir glycerol and water in the pool body 22, thereby being beneficial to promoting the mixing and heat transfer of liquid in the pool and improving the softening effect of the heat shrinkable tube 10.
Referring to fig. 1 and 3, the heat shrinkable tube 10 softened by the heating bath 2 enters the negative pressure expansion mold 3 to be expanded. The negative pressure expanding die 3 is integrally cylindrical and is vertically arranged; it includes an expansion chamber 31, a vacuum chamber 32, and a cooling tube 33. The expansion cavity 31 is used for expanding the heat shrinkable tube 10, is opened in the negative pressure expansion mold 3, and is coaxial with the negative pressure expansion mold 3, and the expansion cavity 31 has an inlet 314 at one end of the negative pressure expansion mold 3 located below, an outlet 315 at one end located above, and the inlet 314 is smaller than the outlet 315.
Referring to fig. 3, the expansion chamber 31 is a variable inner diameter chamber, and includes a cylindrical small inner diameter section 311, a transition section 312 in the shape of a truncated cone, and a cylindrical large inner diameter section 313; also, the small inner diameter section 311 communicates with the inlet 314, and the large inner diameter section 313 communicates with the outlet 315.
Referring to fig. 3 and 4, the vacuum chamber 32 is a cylindrical structure having an annular radial cross section, and surrounds the expansion chamber 31 (preferably, surrounds the large inner diameter section 313) and is coaxially disposed therewith. The vacuum chamber 32 is communicated with the expansion chamber 31 through communication holes 34 extending in the radial direction of the negative pressure expansion die 3, and the communication holes 34 are provided in plurality and uniformly distributed; and the vacuum chamber 32 is communicated with the suction pipe 35. When the softened heat shrinkable tube 10 passes through the expansion cavity 31, the air is extracted by the extraction tube 35 to form a negative pressure in the vacuum cavity 32; the vacuum chamber 32 generates a suction effect on the expansion chamber 31 due to the communication hole 34, so that the heat shrinkable tube 10 is attached to the inner wall of the expansion chamber 31, and the radius of the heat shrinkable tube 10 is expanded since the expansion chamber 31 is a variable inner diameter chamber having an inner diameter at the outlet 315 side larger than that at the inlet 314 side.
Referring to fig. 3 and 4, the cooling pipe 33 is disposed between the expansion chamber 31 and the vacuum chamber 32, and spirally surrounds the outside of the expansion chamber 31. Meanwhile, the cooling pipe 33 is also communicated with the liquid inlet pipe 36 and the liquid outlet pipe 37. The cooling tube 33 is used for cooling the expansion cavity 31 and the heat shrinkable tube 10 therein, so that the problem that the heat shrinkable tube 10 is adhered to the wall of the expansion cavity 31 is reduced, the defects on the wall of the heat shrinkable tube 10 are reduced, and the improvement of the sealing performance and other performances of the heat shrinkable tube 10 is facilitated.
Referring to fig. 5, a plurality of partitions 331 having through holes are provided in the cooling pipe 33, and the instantaneous speed of the cooling fluid is changed when the cooling fluid passes through the through holes; therefore, convection with surrounding cooling liquid is facilitated after the cooling liquid passes through the through holes, heat transfer inside the cooling liquid can be promoted, and the cooling effect is improved.
Referring to fig. 6, the negative pressure expansion mold 3 is positioned higher than the heating bath 2 in the vertical direction, and the inlet 314 is higher than the outlet 315 because of the negative pressure expansion mold 3; therefore, the heat shrinkable tube 10 passes through the heating tank 2 and turns to move upwards to enter the negative pressure expansion die 3. Heat shrinkable tube 10 is not completely tightened at the time of normal traction, and upward moving section 101 of heat shrinkable tube 10 slightly hangs down to form a downward arc due to the turning and gravity. The infrared sensor 5 is disposed at a side between the heating bath 2 and the negative pressure expansion die 3 (i.e., a side of the upward movement section 101 of the heat shrinkable tube 10), and senses the upward movement section 101. If the heat-shrinkable tube 10, especially the thinner heat-shrinkable tube 10, is in the conveying process, the traction force cannot be completely transmitted to the raw material wheel 1, so that the discharging of the raw material wheel 1 is slowed or not discharged; at this moment, the power roller 4 still keeps pulling and the subsequent heat shrinkable tube 10 can not follow up in time, thereby causing the heat shrinkable tube 10 to be pulled by two ends and completely straightened and tightened, and the upward movement section 101 of the heat shrinkable tube 10 leaves the original position (upward movement), so that the infrared sensor 5 can not sense the heat shrinkable tube 10. At this time, the infrared sensor 5 gives an electric signal to the driving device 11 electrically connected with the infrared sensor, and the driving device 11 starts and drives the raw material wheel 1 to rotate, so that additional power is added, discharging is smooth, the situation that the heat shrinkable tube 10 is pulled apart or pulled out of cracks is reduced, the quality of the expanded heat shrinkable tube 10 is improved, and the yield of expansion of the heat shrinkable tube 10 is also improved.
Referring to fig. 1 and 2, the power roller 4 is a pair of rollers and is a driving roller for driving the heat shrinkable tube 9 to move to complete the expansion. Meanwhile, the distance between two opposite rollers of the power roller 4 is smaller than the diameter of the heat shrinkable tube 10, so that the heat shrinkable tube 10 is flattened when passing through the power roller 4, and the heat shrinkable tube 10 is convenient to store and transport. The rear end station of the power roller 4 is a cooling pool 9 which is stored with cooling water and used for cooling the heat shrinkable tube 10; the cooling pool 9 is also provided with a plurality of pressure rods, and the heat shrinkable tube 10 passes through the lower part of the cooling pool during conveying, so that the heat shrinkable tube 10 is prevented from leaving cooling water too early, and the cooling effect is weakened. And a material receiving roller 7 and a material receiving frame 8 are sequentially arranged at a rear end station of the cooling pool 9 and used for collecting and storing the expanded heat shrinkable tube 10.
The implementation principle of the thermal shrinkage pipe expanding equipment in the embodiment of the application is as follows: the raw material wheel 1 discharges materials under the driving of the power roller 4; the heat shrinkable tube 10 enters the heating pool 2 for heating and softening after passing through the driven roller 6; the softened heat shrinkable tube 10 moves upward, and the infrared sensor 5 detects the heat shrinkable tube 10; if the heat shrinkable tube 10 cannot completely transmit the traction force to the raw material wheel 1, so that the heat shrinkable tube 10 is tightened, the infrared sensor 5 gives a signal because the heat shrinkable tube 10 cannot be detected, so that the driving device 11 drives the raw material wheel 1 to rotate actively; then the heat shrinkable tube 10 enters the negative pressure expanding die 3, and the softened heat shrinkable tube 10 is attached to the wall of the expanding cavity 31 and is expanded due to the negative pressure; the expanded heat shrinkable tube 10 is flattened by a power roller 4; after being cooled by the cooling pool 9, the waste water is collected into a collecting frame 8 through a collecting roller 7.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. Pyrocondensation pipe expansion equipment, its characterized in that: comprises a raw material wheel (1), a heating pool (2), a negative pressure expanding die (3), a power roller (4) and an infrared inductor (5);
the raw material wheel (1) is provided with a driving device (11) which is electrically connected with the infrared sensor (5); the power roller (4) is used for driving the heat shrinkable tube (10) to move so as to complete expansion;
the negative pressure expanding die (3) is provided with an expanding cavity (31); the expansion cavity (31) is provided with an inlet (314) at one end of the negative pressure expansion die (3), an outlet (315) at the other end, and the inlet (314) is arranged below the outlet (315);
the heating pool (2) is arranged between the raw material wheel (1) and the negative pressure expansion die (3); the heat shrinkable tube (10) passes through the heating pool (2) and then moves upwards to enter the negative pressure expansion die (3);
the infrared sensor (5) is arranged on the side of the upward movement section (101) of the heat shrinkable tube (10) and can sense the upward movement section (101); when the infrared sensor (5) cannot sense the upward movement section (101) due to tightness, the driving device (11) is started to drive the raw material wheel (1) to rotate.
2. A heat shrinkable tube expanding apparatus as set forth in claim 1, wherein: the negative pressure expansion die (3) is cylindrical and comprises an expansion cavity (31), a vacuum cavity (32) and a cooling pipe (33); the expansion cavity (31) is a variable inner diameter cavity and comprises a small inner diameter section (311), a transition section (312) and a large inner diameter section (313); the small inner diameter section (311) is communicated with an inlet (314), the large inner diameter section (313) is communicated with an outlet (315), and the inlet (314) is smaller than the outlet (315);
the vacuum cavity (32) is of a cylindrical structure with an annular radial section, surrounds the expansion cavity (31), and is communicated with the expansion cavity (31) through a communication hole (34);
the cooling pipe (33) is disposed between the expansion chamber (31) and the vacuum chamber (32).
3. A heat shrinkable tube expanding apparatus as set forth in claim 2, wherein: the vacuum cavity (32), the expansion cavity (31) and the negative pressure expansion die (3) are coaxially arranged; the communication holes (34) extend along the radial direction of the negative pressure expansion die (3), and the communication holes (34) are arranged in a plurality and are uniformly distributed.
4. A heat shrinkable tube expanding apparatus as set forth in claim 2, wherein: the cooling pipe (33) is spirally wound outside the expansion cavity (31).
5. A heat shrinkable tube expanding apparatus as set forth in claim 4, wherein: the cooling pipe (33) is internally provided with a plurality of clapboards (331) with through holes.
6. A heat shrinkable tube expanding apparatus as set forth in claim 1, wherein: the heating tank (2) comprises an upper cover (21), a tank body (22) and a turning wheel (23); glycerol is placed in the tank body (22); the turning wheel (23) is of a cylindrical structure, and the side surface of the turning wheel is composed of a plurality of turning rods (231) which are connected with two ends of the turning wheel (23) and are uniformly arranged along the circumferential direction of the turning wheel (23); the turning wheel (23) can rotate around the axis thereof and is connected with the tank body (22); the turning wheel (23) is partially immersed in the glycerol.
7. A heat shrinkable tube expanding apparatus as set forth in claim 6, wherein: the device also comprises a driven roller (6) which is arranged between the raw material wheel (1) and the heating pool (2).
8. A heat shrinkable tube expanding apparatus as set forth in claim 1, wherein: the power roller (4) is a pair of rollers, and the gap between the two rollers is smaller than the diameter of the heat-shrinkable tube (10); the rear end station of the power roller (4) is provided with a material receiving roller (7), and the rear end station of the material receiving roller (7) is provided with a material receiving frame (8).
9. A heat shrinkable tube expanding apparatus as set forth in claim 8, wherein: and a cooling pool (9) is arranged between the power roller (4) and the material receiving roller (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023347910.7U CN214448456U (en) | 2020-12-30 | 2020-12-30 | Thermal shrinkage pipe expanding equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023347910.7U CN214448456U (en) | 2020-12-30 | 2020-12-30 | Thermal shrinkage pipe expanding equipment |
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| Publication Number | Publication Date |
|---|---|
| CN214448456U true CN214448456U (en) | 2021-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023347910.7U Active CN214448456U (en) | 2020-12-30 | 2020-12-30 | Thermal shrinkage pipe expanding equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116494520A (en) * | 2023-03-13 | 2023-07-28 | 苏州晗普新材料科技有限公司 | Forming equipment for automobile wire harness heat-shrinkable tube |
-
2020
- 2020-12-30 CN CN202023347910.7U patent/CN214448456U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116494520A (en) * | 2023-03-13 | 2023-07-28 | 苏州晗普新材料科技有限公司 | Forming equipment for automobile wire harness heat-shrinkable tube |
| CN116494520B (en) * | 2023-03-13 | 2023-09-15 | 苏州晗普新材料科技有限公司 | Forming equipment for automobile wire harness heat-shrinkable tube |
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