Automatic sleeving detection device for heat shrink tube
By designing an automated heat shrink tubing inspection device, the problems of low efficiency and high cost in traditional heat shrink tubing processes have been solved, achieving efficient and reliable automated tubing and heat shrinking processes, ensuring product consistency and quality reliability.
Patent Information
- Application Number
- CN202511808241.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-03
- Publication Date
- 2026-01-09
AI Technical Summary
Traditional heat shrink tubing processes are inefficient and costly. Manual operation makes it difficult to ensure the consistency of tubing length and the accuracy of its position, resulting in poor product consistency. Furthermore, manual visual inspection is prone to oversights, making it impossible to achieve stable quality control.
An automatic heat shrink tubing inspection device was designed, comprising a rotary feeding mechanism, a feeding mechanism, a tubing mechanism, a heat shrinking mechanism, and a vision inspection mechanism. Through components such as servo motors, vibratory feeders, pneumatic fingers, and vision inspection, the device achieves automated tubing, heat shrinking, and quality inspection, ensuring the consistency and accuracy of tubing length.
The fully automated tubing and heat shrinking process significantly improves production efficiency, reduces labor costs, ensures product consistency and quality reliability, and reduces the risk of human error.
Smart Images
Figure CN121290790A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to an automatic sleeve detection device, and more particularly to an automatic sleeve detection device for heat shrink tubing. Background Technology
[0002] In the manufacturing of electronics, wire harnesses, and automotive parts, heat shrink tubing is a common and critical process. Traditional heat shrink tubing processes mainly rely on manual operation. Workers use tooling blades to cut coiled heat shrink tubing into short tubes, then manually insert the short tubes into the parts to be processed (such as terminals, connectors, etc.), and finally place the tubed parts into a heat gun or oven for heat shrinking and shaping.
[0003] This traditional manual operation mode is inefficient and costly. The entire process, including multiple steps such as tube cutting, sleeve sleeve, and heat shrinking, requires manual labor, resulting in low production efficiency, difficulty in meeting the needs of large-scale production, and high labor costs. Manual tube cutting makes it difficult to ensure consistent sleeve lengths; manual sleeve sleeve makes it difficult to ensure precise positioning; and manual heat shrinking is prone to defects such as twisting, deformation, or incomplete shrinkage due to uneven heating time, distance, and angle. This directly leads to inconsistencies in key product dimensions, poor product consistency, and affects product reliability and yield. After heat shrinking, another manual process is usually required to inspect the product's appearance and dimensions. This not only further increases labor costs, but manual visual inspection is also prone to oversights due to fatigue, making stable and reliable quality control impossible.
[0004] Therefore, there is an urgent need in this field for an integrated device that can achieve fully automated tubing, heat shrinking, and integrated online quality inspection. Summary of the Invention
[0005] To address the shortcomings of the aforementioned technologies, this invention provides an automatic heat shrink tubing detection device.
[0006] To solve the above technical problems, the technical solution adopted by the present invention is: an automatic heat shrink tubing detection device, comprising: Organism; A rotary conveyor mechanism installed on the machine body for intermittently conveying materials; A feeding mechanism is set up at the feeding station corresponding to the rotary conveying mechanism to automatically supply materials to the rotary conveying mechanism; A sleeve-type station corresponding to the rotating material conveying mechanism is a sleeve-type mechanism that automatically cuts heat shrink tubing and inserts it into the material. A heat shrinking mechanism that corresponds to the heat shrinking station of the rotating material conveying mechanism to perform heat shrinking treatment on materials fitted with heat shrink tubing. A vision inspection mechanism is set up at the inspection station corresponding to the rotating material conveying mechanism to perform quality inspection and sorting of heat-shrinked materials.
[0007] Furthermore, the rotary conveying mechanism includes: The servo motor mounted on the machine table, the cam divider connected to the main shaft of the servo motor, the turntable positioned and connected to the indexing wheel of the cam divider, and the pneumatic fingers for material handling arranged in a circular array on the bearing surface of the turntable. The feeding mechanism includes: A vibratory plate with a spiral groove is vibratingly mounted on the machine table, a receiving seat fixed to the machine table at the outlet of the vibratory plate, a slide cylinder fixed to the receiving seat, a lifting cylinder on the moving slide fixed to the slide cylinder, and a suction cup connected to the end of the piston rod of the lifting cylinder. The casing mechanism includes: The base and sleeve tray are mounted on the machine table. The fixed-length inlet tube assembly mounted on the base is used to pull and control the length of the sleeve delivery; A pipe cutter is installed downstream of the discharge path of the fixed-length inlet pipe assembly to cut the fixed-length sleeve; and a pipe take-up assembly is installed downstream of the pipe cutter path to clamp the cut sleeve and put it into the material of the corresponding process on the turntable. The heat shrink mechanism includes: A heating unit that generates temperature-controllable hot air and an air supply unit connected to the heating unit to guide and evenly blow hot air onto the material covered with heat shrink tubing. Visual inspection agencies include: Image acquisition station; an image acquisition unit set at the image acquisition station to acquire image information of the object; a processing unit that is communicatively connected to the image acquisition unit to determine whether the object is qualified based on the image information; an illumination unit set at the image acquisition station to provide illumination for the image acquisition unit.
[0008] Furthermore, the receiving seat is fixedly installed on the machine platform; the receiving seat is equipped with a material stopper for horizontally positioning individual materials, and there is a gap between the inlet of the material stopper on the receiving seat and the outlet of the vibrating plate.
[0009] Furthermore, the slide cylinder is fixedly installed on the side of the receiving seat, and the sliding direction of the slide is perpendicular to the table surface; the lifting cylinder is vertically installed on the slider of the slide, and the extension and retraction direction of the piston rod of the lifting cylinder is perpendicular to the table surface of the machine body, driving the suction cup to move up and down above the receiving seat.
[0010] Furthermore, the fixed-length tube feeding assembly is provided with a guide roller on the base located downstream of the heat shrink tubing tray discharge path; it also includes a pressure roller and a drive roller located downstream of the guide roller on the base, the drive roller being driven by a servo motor, the pressure roller and the drive roller being spaced apart, the pressure roller being driven by a pressure roller cylinder arranged longitudinally on the base to press and separate from the drive roller; it also includes a tube cutter located downstream of the pressure roller and drive roller discharge path, the tube cutter having a tube cutting cylinder arranged longitudinally on the base, the tube cutting cylinder being driven and connected to an upper tube cutting slide, the upper tube cutting slide being provided with a blade, and a lower tube cutting slide being provided below the upper tube cutting slide.
[0011] Furthermore, a first opening device is provided between the heat shrink tube outlet and the guide roller. The first heat shrink tube opening device is located in front of or above the guide roller and is fixedly connected to the guide roller through a tube slit. A first opening is opened on the tube slit and two plate-shaped thermoplastic parts are fixed on the tube slit. There are four pillars between the horizontal plane of the plate-shaped thermoplastic parts and the horizontal plane of the tube slit, and the pillars are placed on the same plane. Before the end face of the thermoplastic tube passes through, the end face is opened and a sphere is placed in the opening. The surface of the sphere is smooth and the diameter is slightly larger than the gap between the pillars but cannot pass through the gap between the pillars.
[0012] Furthermore, a second opening device is provided between the guide roller and the drive wheel. The second heat shrink tube opening device is located in front of the drive wheel. A second opening is opened on the drive wheel. When the heat shrink tube comes out of the guide roller, it is in a closed state and passes through the second opening to reach the drive wheel again.
[0013] Furthermore, the pipe cutter includes a first linear module horizontally mounted in an open space below the base. A pipe-picking pneumatic finger is mounted on the sliding seat of the first linear module. The pipe-picking pneumatic finger is located downstream of the pipe cutter path and aligned with the stop position of the material-carrying pneumatic finger on the turntable.
[0014] This invention provides an automatic heat shrink tubing inspection device, in which all major components are tightly integrated into a highly efficient heat shrink tubing inspection system. The connections between the components not only ensure the rigidity and operational stability of the equipment, but also ensure the orderly and coordinated flow of materials and information, fundamentally solving the pain points of traditional manual operation and possessing extremely high application value in relevant industrial fields. Attached Figure Description
[0015] Figure 1 This is a top view of the present invention.
[0016] Figure 2 This is a perspective view of the present invention.
[0017] Figure 3 This is a partial structural diagram of the present invention. Figure 1 .
[0018] Figure 4 This is a schematic diagram of the feeding mechanism of the present invention.
[0019] Figure 5 This is a partial structural diagram of the present invention. Figure 2 .
[0020] Figure 6 This is the first opening device of the present invention.
[0021] Figure 7 This is the second opening device of the present invention. Detailed Implementation
[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0023] like Figure 1 and 2 As shown, this patent discloses an automatic heat shrink tubing detection device, comprising: Body 1; A rotary conveying mechanism 2, installed on the machine body 1, for intermittently conveying materials; A feeding mechanism 3 is provided to automatically supply materials to the rotary conveying mechanism 2 at the feeding station corresponding to the rotary conveying mechanism 2; The sleeve station corresponding to the rotating material conveying mechanism 2 is a sleeve mechanism 4 that automatically cuts heat shrink tubing and inserts it into the material. A heat shrinking mechanism 5 is used to heat shrink materials fitted with heat shrink tubing at the heat shrinking station corresponding to the rotating material conveying mechanism 2. A visual inspection mechanism 6 is set up at the inspection station corresponding to the rotating material conveying mechanism 2 to perform quality inspection and sorting of the heat-shrinked materials.
[0024] Combination Figure 3 As shown, specifically, the servo motor 201 of the rotary material conveying mechanism 2 is fixedly mounted on the table of the machine body 1 via a motor mount, and its output shaft is rigidly connected to the input shaft of the cam divider 202 via a coupling. The turntable 203 is positioned and connected to the indexing wheel at the output end of the cam divider 202 via a flange or bolts to ensure no relative rotation. Multiple material conveying pneumatic fingers 204 are fixedly mounted on the bearing surface of the turntable 203 in a circumferential array via brackets.
[0025] In this embodiment, four pneumatic fingers 204 are provided, driven by servo motors 201. A cam divider 202 converts continuous rotation into precise 90° intermittent indexing motion, driving the turntable 203 and its pneumatic fingers 204 to step forward. This ensures the synchronization and cycle consistency of all processes, and its high positioning accuracy avoids accumulated errors. The cycle time is adjustable through control of the servo motors to adapt to different production needs.
[0026] Combination Figure 4As shown, the vibratory feeder 301 of the feeding mechanism 3 is vibratingly mounted on the platform of the machine body 1. A receiving tray outlet 305 extends laterally from the vibratory feeder 301. A receiving seat is fixedly mounted on the platform of the machine body 1. A material stopper 302 is installed on the receiving seat 307. A gap is left between the material tray outlet 305 and the material stopper 302, but the gap does not affect the material transportation. The cylinder body of the slide cylinder is fixedly mounted on the receiving seat 307. The cylinder body of the lifting cylinder 303 is vertically fixed on the moving slide of the slide cylinder 306. The suction cup 304 is directly connected to the end of the piston rod of the lifting cylinder 303.
[0027] The combination of the receiving seat 307 and the receiving tray outlet 305 effectively solves the problems of jamming and stacking of small parts, ensuring the reliability of single feeding. Driven by a vibrator (such as an electromagnetic vibrator), the vibratory feeder generates high-frequency, low-amplitude vibrations. Under the action of directional vibration, the scattered material crawls along the path of the spiral groove. In this process, vibration energy is converted into the driving force for the material's forward movement. Since the cross-sectional shape of the spiral groove roughly matches the shape of the material, guided by vibration and the groove wall, the material gradually adjusts its posture, eventually flowing towards the end of the spiral groove outlet with a consistent orientation. When the material in front is about to stop at the receiving seat inlet, the material behind will continue to push it forward to the end of the stopper 302, where it comes to a standstill.
[0028] The rectangular coordinate mechanical connection between the slide cylinder 306, the lifting cylinder 303, and the suction cup 304 constitutes a stable and reliable pick-and-place robot, whose actions include descending, picking up, rising, extending, handing over, and retracting, providing precise material supply for subsequent processes.
[0029] Combination Figure 3 As shown, the tubing tray 401 and base 402 of the tubing mechanism 4 are both fixedly mounted on the table surface of the machine body 1. The guide roller 403 and the pressure roller cylinder 406 are both mounted on the base 402. The drive wheel 404 is coaxially connected to the main shaft of the servo motor. A first heat shrink tubing opening device 420 is provided in front of the guide roller 403, and a second heat shrink tubing opening device 430 is provided in front of the drive wheel 404. The cylinder body of the tube cutting cylinder 407 is fixed vertically on the base 402, and its piston rod is connected to the upper tube cutting slide 408. The blade 409 is fixedly mounted on the upper tube cutting slide 408. The lower tube cutting slide 410 is fixed on the base 402 and located directly below the upper tube cutting slide 408. The first linear module 411 is mounted horizontally on the table surface of the machine body 1, and the tube picking pneumatic finger 412 is mounted on the movable seat of the first linear module 411. The tube picking pneumatic finger 412 is equipped with a tube picking clamp 413.
[0030] In the above relationship, when the heat shrink tubing is pulled out from the tubing tray 401, it is tightly closed and in a flat crescent shape. After being cut by the production line, the heat shrink tubing may not open but instead appear as a half-crescent shape, making it unable to fit the material, resulting in unqualified products and equipment shutdown.
[0031] Combination Figure 6 As shown, the first heat shrink tubing opening device 420 is located in front of (above) the guide roller 403 and is fixedly connected to the guide roller 403 via a tube slit 4201. The tube slit 4201 has a first opening 4201K, and two plate-shaped thermoplastic parts 4202 are fixed on the tube slit 4201. Four pillars 4203 are positioned between the horizontal plane of the plate-shaped thermoplastic parts 4202 and the horizontal plane of the tube slit 4201, and the pillars 4202 are placed on the same plane. Before the end face of the thermoplastic tubing passes through, the end face is opened, and a sphere 4204 is placed inside the opening. The sphere has a smooth surface and a diameter slightly larger than the gap between the pillars 4202. Then, the end face passes through the gap between the plate-shaped thermoplastic parts 4202 and through the first opening 4201K to reach the guide roller 403. The sphere 4204 cannot pass through the gap between the pillars 4202.
[0032] Combination Figure 7 As shown, the second heat shrink tubing opening device 430 is located in front of the drive wheel 404. A second opening 430K is formed on 430. When the heat shrink tubing comes out of the guide roller 403, it is in a closed state (but not crescent-shaped). It passes through the second opening 430K and reaches the drive wheel 404 again. After being pressed by the drive wheel 404 and the pressure cylinder 406, the heat shrink tubing will not become crescent-shaped.
[0033] When the tube clamp 413 clamps the cut heat shrink tubing, the entire length of the heat shrink tubing is open, and the cross-section inside the opening is adapted to the end face of the material to be fitted. After the material is fitted, when the clamp releases the heat shrink tubing, the heat shrink tubing automatically springs back to a flat state and then fits tightly against the material. When the rotating mechanism moves with the material, the tubing will not deviate due to inertia.
[0034] The above connections constitute a sequential production line. The tubing is extracted from the tray, guided by the open guide roller 403, and then pressed and pulled to a fixed length by the drive wheel 404 and pressure roller 405. It then enters a shearing station where the cutting cylinder 407 drives the blade 409 in conjunction with the lower cutting slide 410 for cutting. Finally, the first linear module 411 drives the pneumatic finger 412 for picking up the tubing, which in turn drives the tubing clamp 413 to complete the tubing picking and tubing assembly. This design integrates multiple actions into a compact station, achieving a high degree of automation. The servo motor-driven drive wheel ensures consistent tubing length, while the unique opening device and tubing clamp design ensure high success rate and accuracy in tubing assembly.
[0035] Combination Figure 5As shown in the figure, the heating unit 501 of the heat shrinkage mechanism 5, such as a heating pipe, is installed inside the machine body 1 or under the tabletop. The air supply unit 502, such as a heat-resistant air duct, is hermetically connected to the air outlet of the heating unit 501 through a flange. The heating unit 501 can be a hot air blower or a heating pipe. Its air outlet pipe part is fixedly installed on the bracket at the heat shrinkage station and is aligned with the material at two places, up and down. Preferably, the positions at the two places can be adjusted through a cylinder and a slideway. The heating unit 501 generates hot air with a controllable temperature, and forms a uniform hot air curtain through the upper and lower air outlet pipes and fine holes of the air supply unit 502 to wrap the sleeve part. This connection and layout completely avoid the twisting, deformation or local overheating damage of the heat shrinkable tube caused by unilateral heating, and significantly improve the appearance consistency and reliability of the product.
[0036] Both the image acquisition unit 601 and the lighting unit 602 of the vision inspection mechanism 6 are fixedly installed above and below the imaging station through brackets. The processing unit 603 can be installed in the electric control box and is electrically connected to the image acquisition unit 601 through a data cable. The rotary gripper 604 is installed on an independent second linear module 605, and this module is fixed to the tabletop of the machine body 1. The rotary gripper 604 picks up materials from the turntable and moves them to the inspection station. The upper and lower two groups of light sources 602 provide uniform illumination. The image acquisition unit 601 is a camera. After the camera takes a picture, the image data is transmitted to the processing unit 603 for analysis and judgment, and then uploaded to the display 606 to display the image of the material, and it is inspected whether it is qualified through an image detection program. Preferably, the position of the rotary gripper 604 can be adjusted through a cylinder and a slideway. The imaging part in the vision inspection mechanism has two groups of light sources, upper and lower, which are a camera and a lens respectively. The pneumatic rotary gripper grabs the materials of the pneumatic fingers corresponding to the process on the turntable and sends them into the imaging station through the guide rail module. The upper and lower two groups of light sources controlled by PLC at the imaging station are instantaneously illuminated at the same time, and the camera instantaneously takes pictures and records the time. The background for taking pictures is black that is opaque and non-reflective. Because the exposure time is extremely short at the millisecond level, the backgrounds of the upper and lower images are both black. After illumination, the reflection on the metal surface of the material and the edges of the heat shrinkage part can also be clearly captured to form an image. The image is transmitted to the software controlled by the industrial control computer. The algorithm in the software first extracts the image from the light relative to the material image part, and then analyzes the coordinate data formed by its size and appearance points, and compares it with the pre-set coordinate template. The pre-set template is the coordinate value range set after taking pictures of good products and defective products. If the imaging coordinate value is within the pre-set template coordinate value range, it is judged as qualified, otherwise it is unqualified. The industrial control computer sends the coordinate data to the PLC for feedback, and the rotary gripper then continues the next action.
[0037] Among them, for the two groups of light sources, upper and lower, of the imaging mechanism, the camera works instantaneously at the same time, which saves time and workstations compared with taking pictures with divided workstations for illumination.
[0038] Finally, after the judgment, the rotating gripper moves to the corresponding discharge port. After the gripper fingers rotate 90° axially, they are released, and the material enters the corresponding discharge port.
[0039] This system, through the positioning accuracy guaranteed by the servo system and cam divider, and the consistent sleeve length guaranteed by the fixed-length tube feeding assembly, fundamentally eliminates the inherent instability of manual operation. This device highly integrates the production process, significantly reducing the number of operators and directly lowering labor and management costs. Simultaneously, it frees workers from repetitive and heavy labor, improves the working environment, and reduces reliance on worker skill levels.
[0040] Its core lies in constructing a highly coordinated automated system with a rotary material conveying mechanism as the core of the cycle and surrounding functional mechanisms as execution units. Specifically, the rotary material conveying mechanism, as the device's cyclic system, regulates the overall production cycle through its precise intermittent motion. The feeding mechanism, sleeve mechanism, heat shrinking mechanism, and vision inspection mechanism, each with distinct functions, are positioned at key nodes in this cycle. Their coordination is not a simple superposition but a deep functional coupling. The feeding mechanism, as the starting point, provides the system with a stable supply of raw materials; the sleeve mechanism follows closely, transforming continuous tubing into discrete, fixed-length sleeves and precisely fitting them in; the heat shrinking mechanism solidifies and shapes the sleeved results; finally, the vision inspection mechanism, as the quality inspection unit, completes inspection and sorting. Throughout the process, the material flow and instruction flow can flow orderly under the unified scheduling of existing PLC technology, forming a seamless, closed-loop automated loop from raw materials to qualified products.
[0041] This patent integrates all the major components into a highly efficient heat shrink tubing inspection system. The connections between the components not only ensure the rigidity and operational stability of the equipment, but also guarantee the orderly and coordinated flow of materials and information, fundamentally solving the pain points of traditional manual operation and possessing extremely high application value in relevant industrial fields.
[0042] The above embodiments are not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the technical solution of the present invention are also within the protection scope of the present invention.
Claims
1. An automatic heat shrink tubing detection device, characterized in that, include: Organism; A rotary conveying mechanism installed on the machine body for intermittently conveying materials; The rotating conveyor is equipped with a feeding station for automatically supplying materials to the rotating conveyor; a sleeve station for automatically cutting heat shrink tubing and inserting it into the material; a heat shrink station for heat shrinking the material with heat shrink tubing; and a vision inspection station for quality inspection and sorting of the heat-shrinked material.
2. The automatic heat shrink tubing detection device according to claim 1, characterized in that: The rotary material conveying mechanism includes: The servo motor mounted on the machine table, the cam divider connected to the main shaft of the servo motor, the turntable positioned and connected to the indexing wheel of the cam divider, and the pneumatic fingers for material handling arranged in a circular array on the bearing surface of the turntable. The feeding mechanism includes: A vibratory plate with a spiral groove is vibratingly mounted on the machine table, a receiving seat fixed to the machine table at the outlet of the vibratory plate, a slide cylinder fixed to the receiving seat, a lifting cylinder on the moving slide fixed to the slide cylinder, and a suction cup connected to the end of the piston rod of the lifting cylinder. The sleeve mechanism includes: The base and sleeve tray are mounted on the machine table. The fixed-length inlet tube assembly mounted on the base is used to pull and control the length of the sleeve delivery; A pipe cutter is located downstream of the discharge path of the fixed-length inlet pipe assembly to cut the fixed-length sleeve; and a pipe take-up assembly is located downstream of the path of the pipe cutter to clamp the cut sleeve and put it into the material of the corresponding process on the turntable. The heat shrink mechanism includes: A temperature-controlled hot air heating unit and an air supply unit connected to the heating unit to guide and evenly blow hot air onto the material covered with heat shrink tubing. The visual inspection mechanism includes: An image acquisition station; an image acquisition unit located at the image acquisition station to acquire image information of an object; a processing unit communicatively connected to the image acquisition unit to determine whether the object is qualified based on the image information; and an illumination unit located at the image acquisition station to provide illumination for the image acquisition unit.
3. The automatic heat shrink tubing detection device according to claim 2, characterized in that: The receiving seat is fixedly installed on the machine platform; the receiving seat is equipped with a material blocker for horizontally positioning a single material, and there is a gap between the inlet of the material blocker on the receiving seat and the outlet of the vibrating plate.
4. The automatic heat shrink tubing detection device according to claim 2, characterized in that: The slide cylinder is fixedly installed on the side of the receiving seat, and the sliding direction of the slide is perpendicular to the table surface; the lifting cylinder is vertically installed on the slider of the slide, and the piston rod of the lifting cylinder extends and retracts perpendicular to the table surface of the machine body, driving the suction cup to move up and down above the receiving seat.
5. The automatic heat shrink tubing detection device according to claim 2, characterized in that: The fixed-length tube feeding assembly includes a guide roller on the base located downstream of the heat shrink tubing tray discharge path; it also includes a pressure roller and a drive roller located downstream of the guide roller on the base, the drive roller being driven by a servo motor, the pressure roller and the drive roller being spaced apart, the pressure roller being driven by a pressure roller cylinder longitudinally arranged on the base to press and separate from the drive roller; it also includes a tube cutter located downstream of the pressure roller and drive roller discharge path, the tube cutter having a tube cutting cylinder longitudinally arranged on the base, the tube cutting cylinder being driven and connected to an upper tube cutting slide, the upper tube cutting slide being provided with a blade, and a lower tube cutting slide being provided below the upper tube cutting slide.
6. The sleeve mechanism according to claim 5, characterized in that, A first opening device is provided between the heat shrink tube outlet and the guide roller. The first heat shrink tube opening device is located in front of or above the guide roller and is fixedly connected to the guide roller through a tube slit. A first opening is opened on the tube slit and two plate-shaped thermoplastic parts are fixed on the tube slit. There are four columns between the horizontal plane of the plate-shaped thermoplastic parts and the horizontal plane of the tube slit, and the columns are placed on the same plane. Before the end face of the thermoplastic tube passes through, the end face is opened and a sphere is placed in the opening. The surface of the sphere is smooth and the diameter is slightly larger than the gap between the columns but cannot pass through the gap between the columns.
7. The sleeve mechanism according to claim 5, characterized in that, A second opening device is provided between the guide roller and the drive wheel. The second heat shrink tube opening device is located in front of the drive wheel. A second opening is opened on the drive wheel. When the heat shrink tube comes out of the guide roller, it is in a closed state. It passes through the second opening and reaches the drive wheel again.
8. The automatic heat shrink tubing detection device according to claim 5, characterized in that: The pipe cutter includes a first linear module horizontally mounted in an overhead position below the base. A pipe-picking pneumatic finger is mounted on the sliding seat of the first linear module. The pipe-picking pneumatic finger is located downstream of the pipe cutter path and aligned with the stop position of the material-carrying pneumatic finger on the turntable.