A heat-shrink tube heat-shrinking device

Abstract

The application belongs to the technical field of wire harness production and processing, and provides a heat shrink tube heat shrinking device, which comprises a bottom plate, a plurality of rotating heat shrinking mechanisms and wire clamping and feeding mechanisms are arranged on the bottom plate, and the wire clamping and feeding mechanisms are respectively arranged correspondingly with the rotating heat shrinking mechanisms; the rotating heat shrinking mechanism comprises a vertical plate fixedly installed on the bottom plate, a hot air gun driven by a first driving device is rotatably installed on the vertical plate, an air outlet end of the hot air gun is close to the wire clamping and feeding mechanism and is fixedly installed with a U-shaped air cavity assembly, the U-shaped air cavity assembly is provided with a hot air passage, an air outlet pipe of the hot air gun extends into the U-shaped air cavity assembly and is in communication with the hot air passage, air outlets of the hot air passage are located at open ends of the U-shaped air cavity assembly, and the air outlets of the hot air passage are provided with two air outlets which are respectively arranged correspondingly on the inner sides of the open ends of the U-shaped air cavity assembly. The application can realize automatic heat shrinking processing of workpieces, and the processing efficiency and processing quality are greatly improved. The cost is reduced and the efficiency is increased, and the product yield is high.

Description

Technical Field

[0001] This invention relates to the field of wire harness manufacturing and processing technology, and in particular to a heat shrink tubing heat shrinking device. Background Technology

[0002] Double-wall heat-shrink tubing, also known as PE heat-shrink tubing, is a high-end product made of irradiated cross-linked polyethylene material. It features a double-layer structure: the outer layer is made of irradiated cross-linked polyethylene, providing insulation, wear resistance, and flame retardancy; the inner layer is a hot-melt adhesive layer, providing sealing, waterproofing, and cushioning. In wire harness manufacturing, the heat-shrinking process typically involves first fitting the double-wall heat-shrink tubing onto the wire harness to form the workpiece, and then performing heat-shrinking processing. This causes the double-wall heat-shrink tubing to shrink under heat and tightly wrap around the wire harness, achieving insulation, sealing, and mechanical protection.

[0003] Currently, there is no dedicated equipment for automating the heat shrinking process of the aforementioned workpieces. The main heat shrinking methods for workpieces are as follows: 1. Positioning the workpiece using a positioning fixture, and then manually performing heat shrinking by holding a hot air gun; 2. Positioning the workpiece using a positioning fixture, and then using a semi-automatic moving device to drive the hot air gun to move along the length of the workpiece to perform heat shrinking; 3. Fixing the hot air gun, and then manually moving or rotating the workpiece after holding it close to the hot air gun to achieve heat shrinking.

[0004] The traditional method of manually heat-shrinking workpieces using a positioning fixture and then manually holding a hot air gun is labor-intensive, inefficient, and prone to problems such as inconsistent shrinkage dimensions and conditions, bubbling, and adhesive overflow. While using a semi-automatic moving device to drive the hot air gun along the length of the workpiece reduces manual labor to some extent, the efficiency remains low, and uneven heating of the workpiece's circumference results in irregular shapes and poor heat-shrink quality. Furthermore, while fixing the hot air gun and manually holding the workpiece improves the uneven heating somewhat, it still suffers from high labor intensity, low efficiency, high costs, difficulty in meeting production requirements, and certain safety hazards. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art as mentioned above, in-depth research was conducted, and after a great deal of creative work, the present invention was completed.

[0006] Specifically, the technical problem to be solved by the present invention is to provide a heat shrink tubing heat shrinking device to solve the technical problems of low processing efficiency and poor processing quality of the current heat shrink processing method.

[0007] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0008] A heat shrink tubing heat shrinking device includes a base plate, on which a plurality of rotary heat shrinking mechanisms and a plurality of wire clamping and feeding mechanisms are arranged in sequence, and the wire clamping and feeding mechanisms are respectively arranged in one-to-one correspondence with the rotary heat shrinking mechanisms.

[0009] The rotary heat shrinking mechanism includes a vertical plate fixedly mounted on the base plate. A hot air gun driven by a first driving device is rotatably mounted on the vertical plate. The air outlet of the hot air gun is close to the wire feeding mechanism, and a U-shaped air cavity assembly is fixedly mounted on the air outlet of the hot air gun. The U-shaped air cavity assembly has a hot air channel. The air outlet of the hot air gun extends into the U-shaped air cavity assembly and is connected to the hot air channel. The air outlet of the hot air channel is located at the open end of the U-shaped air cavity assembly, and there are two air outlets in the hot air channel. The two air outlets are respectively opened on the inner side of the open end of the U-shaped air cavity assembly.

[0010] As an improved technical solution, two guide blocks are fixedly installed at the air outlet position on the open end of the U-shaped air cavity assembly. The guide blocks have air inlet holes corresponding to the air outlet, and the end of the guide block away from the U-shaped air cavity assembly has an inclined guide surface.

[0011] As an improved technical solution, the U-shaped air cavity assembly includes two correspondingly arranged air guide plates. Each air guide plate has an air guide groove and a clearance groove communicating with the air guide groove. The two air guide plates are sealed and fixedly connected. The clearance grooves of the two air guide plates surround and form an insertion hole adapted to the air outlet pipe of the hot air gun. The air guide grooves of the two air guide plates surround and form the hot air channel.

[0012] The hot air gun has two corresponding air cavity fixing blocks fixedly installed at the air outlet end. The U-shaped air cavity assembly is located between the two air cavity fixing blocks, and the air cavity fixing blocks have strip-shaped mounting holes. The air cavity fixing blocks are fixedly connected to the air guide plate by connecting bolts passing through the strip-shaped mounting holes. The guide block is fixedly connected to the open end of the air guide plate.

[0013] As an improved technical solution, a bearing inner sleeve is fixedly fitted on the hot air gun. The bearing inner sleeve is rotatably connected to the vertical plate by a rotary bearing. The hot air gun is rotatably mounted on the vertical plate through the bearing inner sleeve and the rotary bearing.

[0014] The first driving device includes a first driving motor fixedly mounted on the upright plate, a driving gear mounted on the output shaft of the first driving motor, and a driven gear fixedly mounted on the inner bushing of the bearing, wherein the driving gear meshes with the driven gear.

[0015] As an improved technical solution, the hot air gun is fitted with a hot air gun cooperating block, which is located on the side of the vertical plate away from the driven gear, and the hot air gun cooperating block is fixedly connected to the bearing inner bushing.

[0016] A metal pin is fixedly installed on the air gun cooperating block, and a proximity sensor for detecting the metal pin is fixedly installed on the upright plate.

[0017] As an improved technical solution, a coaxial block is also fixedly mounted on the hot air gun, and the coaxial block is located near the air outlet end of the hot air gun.

[0018] As an improved technical solution, the wire clamping feeding mechanism includes a sliding mounting plate, which is slidably mounted on the base plate along the direction of approaching / away from the rotary heat shrinking mechanism and is driven by a second driving device. A connecting plate is fixedly mounted on the sliding mounting plate.

[0019] A wire carrier block is fixedly installed on one end of the connecting plate near the rotary heat shrinking mechanism. The wire carrier block has a wire feeding groove, and a wire-sensing photoelectric switch for workpiece detection is fixedly installed on the wire carrier block.

[0020] A slide rail frame is also fixedly installed on the connecting plate. A slide rail upper plate driven by a third drive device is slidably installed on the slide rail frame along the direction close to / away from the rotating heat shrinking mechanism. A wire clamping cylinder is fixedly installed on the slide rail upper plate. An avoidance hole is opened in the middle part of the wire carrying block. The clamping claw end of the wire clamping cylinder extends to the avoidance hole and is fixedly installed with a wire clamping block. The wire release groove is located between the two wire clamping blocks.

[0021] As an improved technical solution, a first slide rail is fixedly installed on the base plate, a first slider is slidably installed on the first slide rail, the first slider is fixedly connected to the sliding mounting plate, and the sliding mounting plate is slidably installed on the base plate through the first slide rail and the first slider;

[0022] The second driving device includes a second driving motor fixedly mounted on the base plate. A first wire feeding gear is mounted on the output shaft of the second driving motor. A first rack is fixedly mounted on the side of the sliding mounting plate near the first wire feeding gear, and the first wire feeding gear meshes with the first rack. A dust cover covering the first wire feeding gear and the first rack is also fixedly mounted on the sliding mounting plate.

[0023] A wire feeding detection plate is also fixedly installed on the sliding mounting plate, and a wire feeding origin photoelectric switch for realizing the detection of the wire feeding detection plate is fixedly installed on the base plate.

[0024] A second slide rail is fixedly installed on the slide rail frame, and a second slider is slidably installed on the second slide rail. The second slider is fixedly connected to the upper plate of the slide rail, and the upper plate of the slide rail is slidably installed on the slide rail frame via the second slide rail and the second slider.

[0025] The third driving device includes a third driving motor fixedly mounted on the connecting plate. A second wire feeding gear is mounted on the output shaft of the third driving motor. A second rack corresponding to the second wire feeding gear is fixedly mounted on the upper plate of the slide rail. The second wire feeding gear meshes with the second rack.

[0026] A wire clamping detection plate is also fixedly installed on the upper plate of the slide rail, and a wire clamping origin photoelectric switch for detecting the wire clamping point is fixedly installed on the connecting plate.

[0027] As an improved technical solution, a button mounting plate is fixedly installed on the other end of the connecting plate, a start button is fixedly installed on the button mounting plate, and a wire support groove corresponding to the wire feeding groove is opened on the button mounting plate.

[0028] As an improved technical solution, a protective cover is also fixedly installed on the base plate. The protective cover covers the rotary heat shrinking mechanism, and the protective cover has inlet and outlet windows respectively corresponding to the wire feeding mechanism on the side near the wire feeding mechanism.

[0029] Alternatively, an electrical box is provided below the base plate, the base plate is fixedly installed on the electrical box, and a display screen and control buttons are installed at one end of the electrical box, and heat dissipation windows are provided on both sides of the electrical box.

[0030] After adopting the above technical solution, the beneficial effects of the present invention are:

[0031] This heat shrink tubing heat shrinking device features a compact structure and a multi-station design that significantly improves the efficiency of heat shrinking workpieces. In use, the hot air gun operates, drawing hot air through the hot air channels of the U-shaped air chamber assembly to two air outlets. Simultaneously, the first drive device rotates the hot air gun, achieving rotary airflow from the two air outlets. After placing the workpiece into the wire feeding slot on the wire carrier block, the wire harness is placed into the wire support slot on the button mounting plate. Pressing the start button activates the wire clamping cylinder, driving the two wire clamping blocks to clamp the workpiece. Then, the third drive device moves the upper slide rail plate, causing the wire clamping cylinder to move away from the rotating heat shrinking mechanism. The wire clamping blocks pull the workpiece back to its original position. Finally, the second drive device moves the sliding mounting plate closer to the rotating heat shrinking mechanism, delivering the workpiece between the open ends of the U-shaped air chamber assembly, i.e., between the two air outlets. Circumferential heat shrinking of the workpiece is achieved through rotary airflow. The second drive device enables segmented displacement of the workpiece, advancing it one heat-shrinkable segment at a time, thus achieving orderly heat-shrink processing. Finally, the third drive device operates, continuing to advance the workpiece and performing heat-shrink processing on the final tail section until the double-walled heat-shrinkable tube is coated with adhesive. The third drive device's pushing of the tail section prevents the wire carrier block from getting too close to the air outlet and maintains a certain distance between the double-walled heat-shrinkable tube and the wire carrier block, preventing the coated adhesive from sticking to the wire carrier block. This completes the heat-shrink processing of the entire workpiece. After the workpiece is heat-shrinked, the second drive device operates, resetting the sliding mounting plate. Then, the wire clamping cylinder operates, driving the two wire clamping blocks to release the heat-shrinked workpiece. The workpiece is then removed, and the next workpiece is placed in, repeating this process.

[0032] This heat shrink tubing heat shrinking device enables automatic heat shrinking of workpieces, effectively replacing manual labor. It not only makes the processing efficient and orderly, but also greatly reduces processing costs. Furthermore, the workpieces are heated evenly, and the size, shape, and condition of the heat-shrinked workpieces are consistent. The adhesive is applied evenly, resulting in an aesthetically pleasing appearance. While reducing costs and increasing efficiency, the processing quality is greatly improved, and the yield rate of products is reliably guaranteed. Attached Figure Description

[0033] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0034] Figure 1 This is a three-dimensional structural schematic diagram of the heat shrink tubing heat shrinking device of the present invention;

[0035] Figure 2This is another three-dimensional structural schematic diagram of the heat shrink tubing heat shrinking device of the present invention;

[0036] Figure 3 This is a schematic diagram of the arrangement and installation structure of the multi-function components on the base plate of the present invention;

[0037] Figure 4 This is a schematic diagram of the cooperative installation structure of the rotary heat shrinking mechanism and the wire clamping feeding mechanism of the present invention;

[0038] Figure 5 This is a three-dimensional structural diagram of the rotary heat shrinking mechanism of the present invention;

[0039] Figure 6 This is another three-dimensional structural schematic diagram of the rotary heat shrinking mechanism of the present invention;

[0040] Figure 7 This is a cross-sectional view of the rotary heat shrink mechanism of the present invention.

[0041] Figure 8 This is an exploded structural diagram of the rotary heat shrinking mechanism of the present invention;

[0042] Figure 9 This is a schematic diagram of the air guide plate of the present invention;

[0043] Figure 10 This is a schematic diagram of the guide block of the present invention;

[0044] Figure 11 This is a three-dimensional structural schematic diagram of the wire clamping feeding mechanism of the present invention;

[0045] Figure 12 This is another three-dimensional structural schematic diagram of the wire clamping feeding mechanism of the present invention;

[0046] Figure 13 This is another three-dimensional structural schematic diagram of the wire clamping feeding mechanism of the present invention;

[0047] Figure 14 This is a front view schematic diagram of the wire feeding mechanism of the present invention;

[0048] Figure 15 This is a schematic diagram of the mounting structure of the clamping part of the present invention on the connecting plate;

[0049] Figure 16 This is another three-dimensional structural diagram of the wire clamping portion of the present invention mounted on the connecting plate;

[0050] Reference numerals: 1-Base plate; 2-Upright plate; 3-Hot air gun; 4-Air guide plate; 401-Air guide groove; 402-Avoidance groove; 5-Guide block; 501-Air inlet; 502-Guide surface; 6-Air chamber fixing block; 7-Bearing inner bushing; 8-Rotating bearing; 9-First drive motor; 10-Driving gear; 11-Driven gear; 12-Air gun cooperating block; 13-Metal pin; 14-Proximity sensor; 15-Air gun coaxial block; 16-Sliding mounting plate; 17-First slide rail; 18-First slider; 19-Second drive motor; 20-First wire feeding gear; 21-First rack; 22-Dust cover; 23-Wire feeding detection 24-Wire feeding origin photoelectric switch; 25-Connecting plate; 26-Wire carrying block; 2601-Wire feeding groove; 2602-Allowing hole; 27-Wire sensing photoelectric switch; 28-Slide rail frame; 29-Slide rail upper plate; 30-Second slide rail; 31-Second slider; 32-Third drive motor; 33-Second wire feeding gear; 34-Second rack; 35-Wire clamping detection plate; 36-Wire clamping origin photoelectric switch; 37-Wire clamping cylinder; 38-Wire clamping block; 39-Button mounting plate; 3901-Wire support groove; 40-Start button; 41-Protective cover; 42-Electrical box; 43-Display screen; 44-Control button; 45-Heat dissipation window. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0052] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0053] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0054] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0055] like Figures 1 to 16 As shown in the figure, this embodiment provides a heat shrink tubing heat shrinking device, including a base plate 1. The base plate 1 is provided with a plurality of rotary heat shrinking mechanisms and a plurality of wire clamping feeding mechanisms arranged in sequence, and the wire clamping feeding mechanisms are respectively arranged in one-to-one correspondence with the rotary heat shrinking mechanisms. The wire clamping feeding mechanisms realize the orderly feeding of the workpiece, and the rotary heat shrinking mechanisms realize the circumferential rotary heat shrinking processing of the workpiece.

[0056] like Figures 3 to 8 As shown, the rotary heat shrinking mechanism includes a vertical plate 2 fixedly mounted on a base plate 1. A hot air gun 3 driven by a first driving device is rotatably mounted on the vertical plate 2. The air outlet of the hot air gun 3 is close to the wire feeding mechanism, and a U-shaped air cavity assembly is fixedly mounted on the air outlet of the hot air gun 3. The U-shaped air cavity assembly has a hot air channel. The air outlet pipe of the hot air gun 3 extends into the U-shaped air cavity assembly and is connected to the hot air channel. The air outlet of the hot air channel is located at the open end of the U-shaped air cavity assembly, and there are two air outlets in the hot air channel. The two air outlets are respectively opened on the inner side of the open end of the U-shaped air cavity assembly. When the hot air gun 3 is working, the hot air generated by the hot air gun 3 during operation is guided to the two air outlets through the hot air channel of the U-shaped air cavity assembly and blown out. At the same time, the first driving device is working, driving the hot air gun 3 to rotate, realizing rotary blowing of air in the area between the two air outlets.

[0057] like Figures 4 to 8 , Figure 10 As shown in one embodiment, two guide blocks 5 are fixedly installed at the air outlet position on the open end of the U-shaped air cavity assembly. Each guide block 5 has an air inlet 501 corresponding to the air outlet, and the end of the guide block 5 away from the U-shaped air cavity assembly has an inclined guide surface 502. The guide blocks 5 serve to guide the workpiece, facilitating its smooth entry and exit from the heat shrinking area. The air inlets 501 on the guide blocks 5 guide and transport hot air, ensuring effective heat shrinking of the workpiece.

[0058] like Figures 4 to 9As shown in the figure, in one embodiment, the U-shaped air cavity assembly includes two correspondingly arranged air guide plates 4. The air guide plate 4 has an air guide groove 401 and a relief groove 402 communicating with the air guide groove 401. The two air guide plates 4 are sealed and fixedly connected. The relief grooves 402 of the two air guide plates 4 surround to form an insertion hole adapted to the air outlet pipe of the hot air gun 3. The air guide grooves 401 of the two air guide plates 4 surround to form a hot air channel. The air outlet pipe of the hot air gun 3 extends through the insertion hole to the interior of the U-shaped air cavity assembly and communicates with the hot air channel.

[0059] like Figures 4 to 9 As shown in one embodiment, two corresponding air cavity fixing blocks 6 are fixedly installed at the air outlet end of the hot air gun 3. The U-shaped air cavity assembly is located between the two air cavity fixing blocks 6, and the air cavity fixing blocks 6 are provided with strip-shaped mounting holes. The air cavity fixing blocks 6 are fixedly connected to the air guide plate 4 by connecting bolts passing through the strip-shaped mounting holes, so as to realize the connection and fixation between the air guide plate 4 and the hot air gun 3, and ensure that the U-shaped air cavity assembly rotates synchronously with the rotation of the hot air gun 3. The guide block 5 is fixedly connected to the open end of the air guide plate 4.

[0060] like Figures 4 to 8 As shown in the figure, in one embodiment, in order to realize the rotatable installation of the hot air gun 3 on the upright plate 2, a bearing inner sleeve 7 is fixedly installed on the hot air gun 3. The bearing inner sleeve 7 is rotatably connected to the upright plate 2 by means of a rotary bearing 8. The hot air gun 3 is rotatably installed on the upright plate 2 through the bearing inner sleeve 7 and the rotary bearing 8.

[0061] like Figures 4 to 8 As shown in the figure, in one embodiment, the first driving device includes a first driving motor 9 fixedly mounted on the upright plate 2. A driving gear 10 is mounted on the output shaft of the first driving motor 9, and a driven gear 11 is fixedly mounted on the bearing inner sleeve 7. The driving gear 10 and the driven gear 11 mesh with each other. When the first driving motor 9 operates, it drives the driving gear 10 to rotate, thereby causing the driven gear 11 to rotate accordingly, and driving the hot air gun 3 to rotate through the rotary bearing 8 and the bearing inner sleeve 7.

[0062] like Figures 4 to 8 As shown in the figure, in one embodiment, a hot air gun 3 is fitted with a hot air gun cooperating block 12. The hot air gun cooperating block 12 is disposed on the side of the upright plate 2 away from the driven gear 11, and the hot air gun cooperating block 12 is fixedly connected to the bearing inner bushing 7. In this way, axial displacement of the hot air gun 3 can be avoided, and the hot air gun 3 can be stably rotated and installed on the upright plate 2.

[0063] like Figures 4 to 8As shown in the diagram, in one embodiment, a metal pin 13 is fixedly mounted on the hot air gun cooperating block 12, and a proximity sensor 14 for detecting the metal pin 13 is fixedly mounted on the upright plate 2. During operation, the number of rotations of the hot air gun 3 can be detected in real time by the proximity sensor 14 detecting the metal pin 13 and the result is fed back to the control system, which then adjusts the first drive device in real time.

[0064] like Figures 4 to 8 As shown in the figure, in one embodiment, a coaxial block 15 is also fixedly mounted on the hot air gun 3. The coaxial block 15 is located near the air outlet of the hot air gun 3 and is fixedly mounted on the hot air gun 3 using set screws. By adjusting the coaxial block 15, it can be ensured that the hot air gun 3 rotates smoothly around its axis, avoiding the phenomenon of shaking when the hot air gun 3 rotates, thereby achieving effective heat shrinking processing of the workpiece and ensuring the quality of heat shrinking processing of the workpiece.

[0065] like Figures 1 to 3 , Figures 11 to 16 As shown in the figure, in one embodiment, the wire feeding mechanism includes a sliding mounting plate 16, which is slidably mounted on the base plate 1 along the direction of approaching / away from the rotating heat shrinking mechanism and is driven by a second driving device. A connecting plate 25 is fixedly mounted on the sliding mounting plate 16. A wire carrying block 26 is fixedly mounted on one end of the connecting plate 25 near the rotating heat shrinking mechanism. A wire feeding groove 2601 is provided on the wire carrying block 26, and a wire-sensing photoelectric switch 27 for realizing workpiece detection is fixedly mounted on the wire carrying block 26. A slide rail frame 28 is also fixedly mounted on the connecting plate 25. A slide rail upper plate 29 driven by a third driving device is slidably mounted on the slide rail frame 28 along the direction of approaching / away from the rotating heat shrinking mechanism. A wire clamping cylinder 37 is fixedly mounted on the slide rail upper plate 29. An avoidance hole 2602 is provided in the middle part of the wire carrying block 26. The clamping claw end of the wire clamping cylinder 37 extends to the avoidance hole 2602 and is fixedly mounted with a wire clamping block 38. The wire feeding groove 2601 is located between two wire clamping blocks 38.

[0066] The wire feeding mechanism includes a wire feeding slot 2601 on the wire carrier block 26, which facilitates the positioning of the workpiece on the wire carrier block 26 and is suitable for different types of wire harnesses. After the workpiece is placed in the wire feeding slot 2601 of the wire carrier block 26, the wire clamping cylinder 37 operates, driving the two wire clamping blocks 38 to clamp the workpiece. Then, the third drive device drives the upper slide rail plate 29 to move, causing the wire clamping cylinder 37 to move away from the rotating heat shrinking mechanism. The wire clamping blocks 38 pull the workpiece back to its original position, ensuring that each workpiece is in a consistent initial position before processing. Furthermore, since the initial positions of each workpiece in the wire feeding slot 2601 may differ when placed on the wire carrier block 26, the workpiece is... During the original position pulling process, when the workpiece reaches the original position, the workpiece is stuck at the end of the wire-carrying block 26. Although the third drive device continues to drive the upper slide plate 29 to move, driving the wire-clamping cylinder 37 and the wire-clamping block 38 to move, the wire-clamping block 38 slides with the workpiece during this process, that is, the workpiece remains at the original position. After that, the second drive device works to realize the segmented displacement drive of the workpiece, each time conveying the workpiece to the rotary heat shrinking mechanism a heat shrinking segment distance. In this way, the orderly heat shrinking processing of the workpiece is realized. Finally, the third drive device works to continue to convey the workpiece to the rotary heat shrinking mechanism to perform the final tail section heat shrinking processing of the workpiece until the double-wall heat shrink tube is baked with glue, thus completing the heat shrinking processing of one workpiece. The automatic feeding of workpieces by the wire clamping feeding mechanism, in conjunction with the rotary heat shrinking mechanism, enables efficient and orderly heat shrinking of workpieces, resulting in high processing efficiency and good processing quality. It ensures that the size, shape, state, and appearance of each workpiece are consistent during heat shrinking, with uniform glue dispensing and no glue overflow or sticking to the wire block 26.

[0067] like Figures 1 to 3 , Figures 11 to 14 As shown in the figure, in one embodiment, in order to realize the sliding mounting plate 16 on the base plate 1, a first slide rail 17 is fixedly mounted on the base plate 1, a first slider 18 is slidably mounted on the first slide rail 17, the first slider 18 is fixedly connected to the sliding mounting plate 16, and the sliding mounting plate 16 is slidably mounted on the base plate 1 through the first slide rail 17 and the first slider 18.

[0068] like Figures 1 to 3 , Figures 11 to 14As shown in the figure, in one embodiment, the second driving device includes a second driving motor 19 fixedly mounted on the base plate 1. A first wire feeding gear 20 is mounted on the output shaft of the second driving motor 19. A first rack 21 is fixedly mounted on the side of the sliding mounting plate 16 near the first wire feeding gear 20, and the first wire feeding gear 20 meshes with the first rack 21. A dust cover 22 covering the first wire feeding gear 20 and the first rack 21 is also fixedly mounted on the sliding mounting plate 16 to achieve dust protection. When the second driving motor 19 operates, it drives the first wire feeding gear 20 to rotate. Through the meshing first wire feeding gear 20 and the first rack 21, the sliding mounting plate 16 is moved along the first slide rail 17.

[0069] like Figures 1 to 3 , Figures 11 to 14 As shown in the figure, in one embodiment, a wire feeding detection plate 23 is also fixedly installed on the sliding mounting plate 16, and a wire feeding origin photoelectric switch 24 for detecting the wire feeding detection plate 23 is fixedly installed on the base plate 1; the second driving device drives the sliding mounting plate 16 to reset and move. When the wire feeding origin photoelectric switch 24 detects the wire feeding detection plate 23, the second driving device stops working. At this time, the wire carrying block 26 is reset to the initial origin position, and the workpiece can be picked up and placed.

[0070] like Figures 1 to 3 , Figures 11 to 16 As shown in one embodiment, in order to achieve the sliding installation of the upper slide rail plate 29 on the slide rail frame 28, a second slide rail 30 is fixedly installed on the slide rail frame 28, and a second slider 31 is slidably installed on the second slide rail 30. The second slider 31 is fixedly connected to the upper slide rail plate 29, and the upper slide rail plate 29 is slidably installed on the slide rail frame 28 through the second slide rail 30 and the second slider 31.

[0071] like Figures 1 to 3 , Figures 11 to 16 As shown in the figure, in one embodiment, the third driving device includes a third driving motor 32 fixedly mounted on the connecting plate 25. A second wire feeding gear 33 is mounted on the output shaft of the third driving motor 32. A second rack 34 corresponding to the second wire feeding gear 33 is fixedly mounted on the upper slide rail plate 29. The second wire feeding gear 33 and the second rack 34 mesh with each other. When the third driving motor 32 operates, it drives the second wire feeding gear 33 to rotate. Through the meshing second wire feeding gear 33 and the second rack 34, the upper slide rail plate 29 is driven to slide along the second slide rail 30.

[0072] like Figures 1 to 3 , Figures 11 to 16As shown in the figure, in one embodiment, a wire clamping detection plate 35 is also fixedly installed on the upper slide rail plate 29, and a wire clamping origin photoelectric switch 36 for detecting the wire clamping detection plate 35 is fixedly installed on the connecting plate 25. The third driving device drives the upper slide rail plate 29 to move. When the wire clamping origin photoelectric switch 36 detects the wire clamping detection plate 35, the third driving device stops working. At this time, the wire clamping cylinder 37 and the wire clamping block 38 are reset to their initial positions, and the workpiece reaches the origin position.

[0073] like Figures 1 to 3 , Figures 11 to 16 As shown in one embodiment, a button mounting plate 39 is fixedly installed on the other end of the connecting plate 25. A start button 40 is fixedly installed on the button mounting plate 39, and a wire support groove 3901 corresponding to the wire feeding groove 2601 is provided on the button mounting plate 39. After the workpiece is placed on the wire carrier block 26, the wire harness falls into the wire support groove 3901 of the button mounting plate 39 to support the wire harness. The start button 40 provided on the button mounting plate 39 controls the wire clamping and feeding mechanism. When the start button 40 is pressed, the wire clamping and feeding mechanism starts to work.

[0074] like Figure 15 and Figure 16 As shown in the diagram, in one embodiment, two line-sensing photoelectric switches 27 are provided, respectively positioned on both sides of the wire-feeding slot 2601, with each switch close to the slot. A detection port for material shortage is provided on the wire-carrying block 26 at the corresponding position of the line-sensing photoelectric switch 27. After a workpiece is placed in the wire-feeding slot 2601 of the wire-carrying block 26, the line-sensing photoelectric switch 27 detects a workpiece signal, indicating that the workpiece is in place. If the line-sensing photoelectric switch 27 does not detect a workpiece signal, it indicates that there is no material in the wire-feeding slot 2601 or that the workpiece is not in place.

[0075] like Figure 1 and Figure 2 As shown in the figure, in one embodiment, a protective cover 41 is also fixedly installed on the base plate 1. The protective cover 41 covers the rotating heat shrinking mechanism, and the protective cover 41 has inlet and outlet windows respectively provided on the side near the wire feeding mechanism. During operation, the protective cover 41 provides safety protection for the rotating heat shrinking mechanism and the workers.

[0076] like Figure 1 and Figure 2 As shown in the figure, in one embodiment, an electrical box 42 is provided below the base plate 1, the base plate 1 is fixedly installed on the electrical box 42, and a display screen 43 and control buttons 44 are installed at one end of the electrical box 42. Heat dissipation windows 45 are provided on both sides of the electrical box 42.

[0077] like Figure 1 and Figure 2As shown in the figure, in one embodiment, the bottom of the electrical box 42 is equipped with a foot, and the electrical box 42 houses a switching power supply and a PLC controller.

[0078] Based on the above structure, the heat shrink tubing heat shrinking device has a compact structure and a multi-station design that can greatly improve the efficiency of heat shrinking processing of workpieces. In use, the hot air gun 3 operates, drawing hot air through the hot air channel of the U-shaped air chamber assembly to the two air outlets before blowing it out. Simultaneously, the first drive device operates, driving the hot air gun 3 to rotate, thus achieving rotational blowing from the two air outlets. After placing the workpiece into the wire feeding slot 2601 on the wire carrier block 26, the wire harness is placed into the wire support slot 3901 on the button mounting plate 39. Then, the start button 40 is pressed, and the wire clamping cylinder 37 operates, driving the two wire clamping blocks 38 to clamp the workpiece. Afterward, the third drive device operates, driving the upper slide rail plate 29 to move, causing the wire clamping cylinder 37 to move away from the rotating heat shrinking mechanism. After the workpiece is pulled back to its original position by the wire clamping blocks 38, the second drive device operates, driving the sliding mounting plate 16 to move closer to the rotating heat shrinking mechanism, sending the workpiece between the open ends of the U-shaped air chamber assembly, i.e., between the two air outlets. The workpiece is then cooled by rotational blowing. The workpiece undergoes circumferential heat shrinking, and the second drive device drives the workpiece to move forward in segments, advancing the workpiece by one heat shrinking segment each time. This ensures orderly heat shrinking of the workpiece. Finally, the third drive device operates, continuing to advance the workpiece to perform heat shrinking on the final tail section until the double-walled heat shrink tube is coated with adhesive. The third drive device pushes the tail section of the workpiece to prevent the wire carrier block 26 from getting too close to the air outlet and to keep the double-walled heat shrink tube a certain distance from the wire carrier block 26, preventing the coated adhesive from sticking to the wire carrier block 26. This completes the heat shrinking of the entire workpiece. After the workpiece is heat-shrinked, the second drive device operates to reset the sliding mounting plate 16. Then, the wire clamping cylinder 37 operates, driving the two wire clamping blocks 38 to release the heat-shrinked workpiece. The workpiece is then removed, and the next workpiece is placed in, and this process is repeated.

[0079] This heat shrink tubing heat shrinking device enables automatic heat shrinking of workpieces, effectively replacing manual labor. It not only makes the processing efficient and orderly, but also greatly reduces processing costs. Furthermore, the workpieces are heated evenly, and the size, shape, and condition of the heat-shrinked workpieces are consistent. The adhesive is applied evenly, resulting in an aesthetically pleasing appearance. While reducing costs and increasing efficiency, the processing quality is greatly improved, and the yield rate of products is reliably guaranteed.

[0080] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the invention. Furthermore, it should be understood that after reading the technical description of this invention, those skilled in the art can make various alterations, modifications, and / or variations to the invention, and all such equivalent forms also fall within the scope of protection defined by the appended claims.

Claims

1. A heat shrink tubing heat shrinking device, characterized in that, Includes a base plate, on which are provided a plurality of rotary heat shrinking mechanisms and a plurality of wire clamping feeding mechanisms arranged in sequence, and the wire clamping feeding mechanisms are respectively arranged in one-to-one correspondence with the rotary heat shrinking mechanisms; The rotary heat shrinking mechanism includes a vertical plate fixedly mounted on the base plate. A hot air gun driven by a first driving device is rotatably mounted on the vertical plate. The air outlet of the hot air gun is close to the wire feeding mechanism, and a U-shaped air cavity assembly is fixedly mounted on the air outlet of the hot air gun. The U-shaped air cavity assembly has a hot air channel. The air outlet pipe of the hot air gun extends into the U-shaped air cavity assembly and is connected to the hot air channel. The air outlet of the hot air channel is located at the open end of the U-shaped air cavity assembly, and there are two air outlets of the hot air channel. The two air outlets are respectively opened on the inner side of the open end of the U-shaped air cavity assembly. The wire clamping feeding mechanism includes a sliding mounting plate, which is slidably mounted on the base plate along the direction of approaching / away from the rotary heat shrinking mechanism and is driven by a second driving device. A connecting plate is fixedly mounted on the sliding mounting plate. A wire carrier block is fixedly installed on one end of the connecting plate near the rotary heat shrinking mechanism. The wire carrier block has a wire feeding groove, and a wire-sensing photoelectric switch for workpiece detection is fixedly installed on the wire carrier block. A slide rail frame is also fixedly installed on the connecting plate. A slide rail upper plate driven by a third drive device is slidably installed on the slide rail frame along the direction close to / away from the rotary heat shrinking mechanism. A wire clamping cylinder is fixedly installed on the slide rail upper plate. An avoidance hole is opened in the middle part of the wire carrying block. The clamping claw end of the wire clamping cylinder extends to the avoidance hole and is fixedly installed with the wire clamping block. The wire feeding groove is located between the two wire clamping blocks. The second driving device drives the workpiece in segments, conveying the workpiece forward by one heat-shrinkable segment each time. The third driving device pushes the tail section of the workpiece so that the double-walled heat-shrinkable tube is separated from the wire block by a certain distance.

2. The heat shrink tubing heat shrinking device according to claim 1, characterized in that, Two guide blocks are fixedly installed at the open end of the U-shaped air cavity assembly at the air outlet position. The guide blocks have air inlet holes corresponding to the air outlet, and the end of the guide block away from the U-shaped air cavity assembly has an inclined guide surface.

3. The heat shrink tubing heat shrinking device according to claim 2, characterized in that, The U-shaped air cavity assembly includes two correspondingly arranged air guide plates. Each air guide plate has an air guide groove and a clearance groove communicating with the air guide groove. The two air guide plates are sealed and fixedly connected. The clearance grooves of the two air guide plates surround and form an insertion hole adapted to the air outlet pipe of the hot air gun. The air guide grooves of the two air guide plates surround and form the hot air channel. The hot air gun has two corresponding air cavity fixing blocks fixedly installed at the air outlet end. The U-shaped air cavity assembly is located between the two air cavity fixing blocks, and the air cavity fixing blocks have strip-shaped mounting holes. The air cavity fixing blocks are fixedly connected to the air guide plate by connecting bolts passing through the strip-shaped mounting holes. The guide block is fixedly connected to the open end of the air guide plate.

4. The heat shrink tubing heat shrinking device according to claim 3, characterized in that, The hot air gun is fixedly fitted with a bearing bushing, which is rotatably connected to the vertical plate via a rotary bearing. The hot air gun is rotatably mounted on the vertical plate via the bearing bushing and the rotary bearing. The first driving device includes a first driving motor fixedly mounted on the upright plate, a driving gear mounted on the output shaft of the first driving motor, and a driven gear fixedly mounted on the inner bushing of the bearing, wherein the driving gear meshes with the driven gear.

5. The heat shrink tubing heat shrinking device according to claim 4, characterized in that, The hot air gun is fitted with a hot air gun cooperating block, which is located on the side of the vertical plate away from the driven gear, and the hot air gun cooperating block is fixedly connected to the bearing inner bushing. A metal pin is fixedly installed on the air gun cooperating block, and a proximity sensor for detecting the metal pin is fixedly installed on the upright plate.

6. The heat shrink tubing heat shrinking device according to claim 5, characterized in that, The hot air gun is also fixedly fitted with a coaxial block, which is located near the air outlet of the hot air gun.

7. The heat shrink tubing heat shrinking device according to any one of claims 1-6, characterized in that, A first slide rail is fixedly installed on the base plate, and a first slider is slidably installed on the first slide rail. The first slider is fixedly connected to the sliding mounting plate, and the sliding mounting plate is slidably installed on the base plate through the first slide rail and the first slider. The second driving device includes a second driving motor fixedly mounted on the base plate. A first wire feeding gear is mounted on the output shaft of the second driving motor. A first rack is fixedly mounted on the side of the sliding mounting plate near the first wire feeding gear, and the first wire feeding gear meshes with the first rack. A dust cover covering the first wire feeding gear and the first rack is also fixedly mounted on the sliding mounting plate. A wire feeding detection plate is also fixedly installed on the sliding mounting plate, and a wire feeding origin photoelectric switch for realizing the detection of the wire feeding detection plate is fixedly installed on the base plate. A second slide rail is fixedly installed on the slide rail frame, and a second slider is slidably installed on the second slide rail. The second slider is fixedly connected to the upper plate of the slide rail, and the upper plate of the slide rail is slidably installed on the slide rail frame via the second slide rail and the second slider. The third driving device includes a third driving motor fixedly mounted on the connecting plate. A second wire feeding gear is mounted on the output shaft of the third driving motor. A second rack corresponding to the second wire feeding gear is fixedly mounted on the upper plate of the slide rail. The second wire feeding gear meshes with the second rack. A wire clamping detection plate is also fixedly installed on the upper plate of the slide rail, and a wire clamping origin photoelectric switch for detecting the wire clamping point is fixedly installed on the connecting plate.

8. The heat shrink tubing heat shrinking device according to claim 7, characterized in that, A button mounting plate is fixedly installed at the other end of the connecting plate. A start button is fixedly installed on the button mounting plate, and a wire support groove corresponding to the wire feeding groove is opened on the button mounting plate.

9. The heat shrink tubing heat shrinking device according to claim 1, characterized in that, A protective cover is also fixedly installed on the base plate. The protective cover covers the rotary heat shrinking mechanism, and the protective cover has inlet and outlet windows respectively corresponding to the wire feeding mechanism on the side near the wire feeding mechanism. Alternatively, an electrical box is provided below the base plate, the base plate is fixedly installed on the electrical box, and a display screen and control buttons are installed at one end of the electrical box, and heat dissipation windows are provided on both sides of the electrical box.

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