Zipper tape pre-expander

Abstract

The utility model provides a kind of zip fastener tape pre-expanding machine, including rack and zip fastener tape, zip fastener tape includes chain belt, upper stop, lower stop and zipper lock, upper stop and lower stop are located at the both ends of chain belt respectively, and the side of upper stop and lower stop is all projected from chain belt, rack is provided with feeding device, pre-expanding device, blanking device and heating device, feeding device is transmitted to pre-expanding device with zip fastener tape, heating device is located below feeding device and carries out heating to zip fastener tape in feeding process, pre-expanding device includes front pressure wheel group and rear pressure wheel group, the speed of front pressure wheel group is greater than the speed of rear pressure wheel group, zip fastener tape is sent by rear pressure wheel group to front pressure wheel group direction, the differential speed between front pressure wheel group and rear pressure wheel group is pre-expanded to zip fastener tape, zip fastener tape after pre-expanding is completed is discharged by blanking device.The zip fastener tape in the utility model has inner arc characteristic after shaping, improves zip fastener tape quality, so that zip fastener tape will not arch in use.

Description

Technical Field

[0001] This utility model belongs to the technical field of zipper tape processing equipment, and relates to a zipper tape pre-expansion machine. Background Technology

[0002] The zipper belt is straight after manufacturing in the factory. A straight zipper can easily cause clothing to bunch up and the zipper to be difficult to open and close. The zipper needs to be pre-expanded to give the belt a certain inner curve. Existing technology uses zipper forming equipment to pre-expand and shape the zipper. The shaped zipper has an inner curve characteristic, and the inner curve is not easily deformed, improving the zipper quality and preventing it from buckling during use. To address this issue, Chinese utility model patent CN202476621U discloses a zipper pressing device, including a bracket, a zipper belt, and a guide rod for conveying the zipper belt. The guide rod is fixedly mounted on the bracket. The device also includes a drive unit mounted on the upper end of the bracket and a pressing mechanism driven by the drive unit. A worktable is fixedly mounted on the bracket, located below the pressing mechanism and adapted to it. The pressing mechanism, driven by the drive unit, moves up and down, cooperating with the worktable to tension the zipper belt and loosen it when the mold is closed. This overcomes the problem of garment arching caused by the lack of an inner curve in the zipper during production. While the above technical solution applies external pressure to the manufactured zipper to give it an inner curve characteristic, zippers with this inner curve are prone to shrinkage and deformation after prolonged use or washing, leading to the disappearance of the inner curve and even affecting normal use. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a zipper tape pre-expansion machine that prevents the inner arc of the zipper tape from deforming.

[0004] The objective of this utility model can be achieved through the following technical solution: A zipper belt pre-expansion machine includes a frame and a zipper belt. The zipper belt includes a chain, a top stop, a bottom stop, and a zipper lock. The top stop and the bottom stop are located at both ends of the chain, and the sides of the top stop and the bottom stop protrude from the chain. The frame is equipped with a feeding device, a pre-expansion device, a discharge device, and a heating device. The feeding device transmits the zipper belt to the pre-expansion device. The heating device is located below the feeding device and heats the zipper belt during the feeding process. The pre-expansion device includes a front pressure roller group and a rear pressure roller group. The speed of the front pressure roller group is greater than the speed of the rear pressure roller group. The zipper belt is conveyed from the rear pressure roller group to the front pressure roller group. The differential speed setting between the front pressure roller group and the rear pressure roller group pre-expands the zipper belt. After pre-expansion, the zipper belt is discharged through the discharge device.

[0005] In the aforementioned zipper tape pre-expansion machine, the feeding device includes a feeding power source, a feeding hook, a feeding pressure foot, and two opposing zipper limiting plates. The frame includes a feeding table, on which the zipper tape is placed. The lower stop side protrudes from the zipper tape to form a step, which abuts against the feeding hook. The feeding power source drives the feeding hook and the zipper tape to move toward the pre-expansion device. During the movement, the zipper tape is located between the two zipper limiting plates, and the bottom of the feeding pressure foot presses down on the zipper tape.

[0006] In the aforementioned zipper tape pre-expansion machine, the feeding power source includes a feeding motor, a feeding rack, a feeding gear, and a feeding guide block. The feeding motor and the feeding guide block are both fixed to the bottom of the feeding table. The feeding guide block has a guide channel inside, and a meshing opening is formed on the side of the guide channel. The feeding rack passes through the guide channel and can move relative to the feeding guide block and the feeding table. The feeding gear is fixed on the output shaft of the feeding motor and meshes with the feeding rack through the meshing opening. The feeding hook is fixed to one end of the feeding rack near the pre-expansion device. The feeding motor drives the feeding gear to rotate, thereby driving the feeding rack and the feeding hook to move and feed material.

[0007] In the aforementioned zipper tape pre-expansion machine, the feeding device further includes a feeding stand fixed on the frame and two feeding base plates. The feeding presser foot includes a horizontal contact part and an arc-shaped elastic part. The top of the arc-shaped elastic part is fixed on the feeding stand. A hot air channel is formed between the two feeding base plates. The width of the hot air channel is smaller than the width of the zipper tape. The feeding hook drives the zipper tape to move onto the hot air channel. The heating device is located below the hot air channel. The heating device includes a hot steam nozzle. After the hot steam nozzle is activated, it sprays hot steam upward through the hot air channel to heat the zipper tape.

[0008] In the aforementioned zipper tape pre-expansion machine, the front pressure roller group includes a front upper pressure roller and a front lower pressure roller arranged opposite each other and rolling synchronously, and the rear pressure roller group includes a rear upper pressure roller and a rear lower pressure roller arranged opposite each other and rolling synchronously. The gap between the front upper pressure roller and the front lower pressure roller and the gap between the rear upper pressure roller and the rear lower pressure roller constitute the pre-expansion channel of the zipper tape. The front upper pressure roller and the rear upper pressure roller abut against the upper surface of the zipper tape, and the front lower pressure roller and the rear lower pressure roller abut against the lower surface of the zipper tape.

[0009] In the aforementioned zipper tape pre-expansion machine, the pre-expansion device further includes a first drive mechanism for driving the front pressure roller group to rotate and a second drive mechanism for driving the rear pressure roller group to rotate. The first drive mechanism includes a first drive motor and a first gear transmission assembly. The first gear transmission assembly includes a first output gear, a first transmission gear, a first pressure roller gear, and a second pressure roller gear. The first output gear is fixed on the output shaft of the first drive motor. The first transmission gear meshes with the first output gear. The diameter of the first transmission gear is larger than the diameter of the first output gear. The first pressure roller gear is coaxially fixed with the first transmission gear and the front lower pressure roller, respectively. The second pressure roller gear meshes with the first pressure roller gear and is coaxially fixed with the front upper pressure roller.

[0010] In the aforementioned zipper tape pre-expansion machine, the second drive mechanism includes a second drive motor and a second gear transmission assembly. The second gear transmission assembly includes a second output gear, a second transmission gear, a third pressure wheel gear, and a fourth pressure wheel gear. The second output gear is fixed on the output shaft of the second drive motor. The second transmission gear meshes with the second output gear. The diameter of the second transmission gear is larger than the diameter of the second output gear. The third pressure wheel gear is coaxially fixed with the second transmission gear and the lower rear pressure wheel. The fourth pressure wheel gear meshes with the third pressure wheel gear and is coaxially fixed with the upper rear pressure wheel. The first transmission gear and the second transmission gear are staggered front to back. The third pressure wheel gear and the first pressure wheel gear are staggered front to back. The fourth pressure wheel gear and the second pressure wheel gear are staggered front to back.

[0011] In the aforementioned zipper belt pre-expansion machine, the first drive motor drives the first output gear to rotate, and the first transmission gear is driven to rotate synchronously, driving the first pressure roller gear, the front lower pressure roller, the second pressure roller gear, and the front upper pressure roller to rotate; the second drive motor drives the second output gear to rotate, and the second transmission gear is driven to rotate synchronously, driving the third pressure roller gear, the rear lower pressure roller, the fourth pressure roller gear, and the rear upper pressure roller to rotate; the diameter of the first transmission gear is larger than the diameter of the first output gear, and the diameter of the second transmission gear is larger than the diameter of the second output gear.

[0012] In the aforementioned zipper tape pre-expansion machine, the feeding device includes a discharge channel located at the tail of the pre-expansion device. The discharge channel is generally arc-shaped and wider at the front than at the back. The end of the discharge channel near the pre-expansion device is the inlet, and the two sides of the end of the discharge channel away from the pre-expansion device extend downward to form the discharge outlet. The bottom of the inlet is located below the front lower pressure roller, and the top of the inlet is located above the front upper pressure roller. The width of the inlet is greater than the width of the discharge outlet, and the width of the discharge outlet is greater than the thickness of the zipper tape.

[0013] In the aforementioned zipper belt pre-expansion machine, the feeding device further includes two arc-shaped zipper guide rails, forming an arc-shaped downward-sloping feeding slide between the two zipper guide rails. The feeding slide includes a receiving slide and a material-forming slide. The receiving slide is located at the bottom of the discharge port. The width of the receiving slide is greater than or equal to the width of the discharge port. The width of the receiving slide is greater than the width of the material-forming slide. The width of the zipper is greater than the width of the material-forming slide and the width of the zipper belt. The receiving slide and the material-forming slide have an arc transition. A limiting block is provided at the end of the material-forming slide.

[0014] In the aforementioned zipper tape pre-expansion machine, the feeding device further includes a receiving movable plate and a receiving cylinder. The receiving cylinder is fixed on the top surface of the frame, and the receiving movable plate is located on the side of the discharge port. The receiving movable plate is inclined and connected to the receiving cylinder.

[0015] The aforementioned zipper tape pre-expansion machine also includes a sensor. When the sensor detects that the lower stop of the zipper tape has passed through the receiving slide, the sensor transmits a command to the receiving cylinder, causing the receiving cylinder to move the receiving movable plate forward. The receiving movable plate presses against the side wall of the discharge port, causing the width of the discharge port to continuously decrease until the width of the discharge port is less than the width of the zipper and the same as the width of the material-forming slide. After the zipper tape extends out of the discharge channel, it contacts the top surface of the receiving movable plate. The suspended zipper tape moves to the material-forming slide after being guided by the inclined receiving movable plate. The zipper tape contacts the top surface of the material-forming slide, causing the zipper tape to hang on the material-forming slide and move downward with the material-forming slide until it contacts the limiting block.

[0016] Compared with existing technologies, this zipper tape pre-expansion machine uses a heating device to heat the zipper tape first, and then uses differential transmission between the front and rear pressure roller groups to pre-expand and shape the zipper tape. The inner arc of the zipper tape after pre-expansion and shaping is not easily deformed, and the shaped zipper tape has an inner arc characteristic, which improves the quality of the zipper tape and prevents it from arching during use. Driven by a feeding motor, the feeding gear and feeding rack drive the feeding hook to move the step and the zipper tape. The transmission is stable and reliable, the structure is simple and the transmission is labor-saving. The movement speed of the zipper tape can be adjusted by adjusting the rotation speed of the output shaft of the feeding motor. The bottom of the feeding pressure foot presses down on the zipper tape, making the zipper tape flatter during movement and preventing wrinkles from appearing during movement. The unloading device ensures that the zipper tape is in a neat and straight hanging state when picking up the material, which is more neat and facilitates subsequent storage and packaging. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the zipper tape pre-expansion machine.

[0018] Figure 2 yes Figure 1 A magnified structural diagram of point A in the middle.

[0019] Figure 3 yes Figure 1 A magnified structural diagram at point B in the middle.

[0020] Figure 4 This is a three-dimensional structural diagram of the pre-expansion machine part of the zipper belt.

[0021] Figure 5 yes Figure 4 A magnified structural diagram at point C.

[0022] In the diagram, 1. Frame; 11. Feeding table; 2. Feeding device; 21. Feeding hook; 22. Feeding presser foot; 23. Zipper limit plate; 24. Feeding motor; 25. Feeding rack; 26. Feeding guide slide; 27. Feeding stand; 28. Feeding base plate; 3. Pre-expansion device; 31. Front pressure roller assembly; 311. Front upper pressure roller; 32. Rear pressure roller assembly; 321. Rear upper pressure roller; 33. First drive motor; 34. First gear transmission assembly; 341. First output gear; 342. First transmission gear. 343. Gear; 344. First pressure wheel gear; 345. Second pressure wheel gear; 36. Second drive motor; 37. Second gear transmission assembly; 38. Second output gear; 39. Second transmission gear; 30. Third pressure wheel gear; 31. Fourth pressure wheel gear; 42. Material feeding device; 43. Material discharge channel; 44. Inlet; 45. Outlet; 46. Material receiving movable plate; 47. Material receiving cylinder; 48. Zipper guide rail; 49. Material receiving slide; 40. Material settling slide; 41. Heating device. Detailed Implementation

[0023] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0024] like Figure 1-5 As shown, this zipper belt pre-expansion machine includes a frame 1 and a zipper belt. The zipper belt includes a chain, a top stop, a bottom stop, and a zipper lock. The top and bottom stops are located at both ends of the chain, and their sides protrude from the chain. The frame 1 is equipped with a feeding device 2, a pre-expansion device 3, a discharge device 4, and a heating device 5. The feeding device 2 transmits the zipper belt to the pre-expansion device 3. The heating device 5 is located below the feeding device 2 and heats the zipper belt during the feeding process. The pre-expansion device 3 includes a front pressure roller group 31 and a rear pressure roller group 32. The speed of the front pressure roller group 31 is greater than that of the rear pressure roller group 32. The zipper belt is conveyed from the rear pressure roller group 32 to the front pressure roller group 31. The differential speed setting between the front pressure roller group 31 and the rear pressure roller group 32 pre-expands the zipper belt. After pre-expansion and cooling, the zipper belt forms an inner arc feature. After pre-expansion, the zipper belt is discharged through the discharge device 4. In this application, the heating device 5 first heats the zipper belt and then pre-expands and shapes it through the differential transmission between the front pressure roller group 31 and the rear pressure roller group 32. The inner arc of the zipper belt is not easily deformed after shaping. The zipper belt with inner arc characteristics after shaping improves the quality of the zipper belt and prevents it from arching during use.

[0025] In the above technical solution: the feeding device 2 includes a feeding power source, a feeding hook 21, a feeding pressure foot 22, and two opposing zipper limiting plates 23. The frame 1 includes a feeding table 11, on which the zipper belt is placed. The lower stop side protrudes from the zipper belt to form a step, which abuts against the feeding hook 21. The feeding power source drives the feeding hook 21 and the zipper belt to move towards the pre-expansion device 3. During the movement, the zipper belt is located between the two zipper limiting plates 23, so that the zipper belt does not shift during the movement. The bottom of the feeding pressure foot 22 presses down on the zipper belt, making the zipper belt flatter during the movement and preventing the zipper belt from wrinkling during the movement.

[0026] In the above technical solution: the feeding power source includes a feeding motor 24, a feeding rack 25, a feeding gear, and a feeding guide slide 26. The feeding motor 24 and the feeding guide slide 26 are both fixed to the bottom of the feeding table 11. The feeding guide slide 26 has a guide channel inside, and a meshing opening is formed on the side of the guide channel. The feeding rack 25 passes through the guide channel and can move relative to the feeding guide slide 26 and the feeding table 11. The feeding gear is fixed to the output shaft of the feeding motor 24 and meshes with the feeding rack 25 through the meshing opening. The feeding hook 21 is fixed to the end of the feeding rack 25 near the pre-expansion device 3. The feeding motor 24 drives the feeding gear to rotate, thereby moving the feeding rack 25 and the feeding hook 21 to feed material. Driven by the feeding motor 24, the feeding gear and feeding rack 25 transmit power, causing the feeding hook 21 to move the step and zipper belt against it. The transmission is stable and reliable, the structure is simple and the transmission is labor-saving. Furthermore, the moving speed of the zipper belt can be adjusted by adjusting the rotation speed of the output shaft of the feeding motor 24.

[0027] In the above technical solution: the feeding device 2 also includes a feeding stand 27 fixed on the frame 1 and two feeding base plates 28. The feeding pressure foot 22 includes a horizontal contact part and an arc-shaped elastic part, the top of which is fixed to the feeding stand 27. A hot air channel is formed between the two feeding base plates 28. The width of the hot air channel is smaller than the width of the zipper belt. The feeding hook 21 drives the zipper belt to move onto the hot air channel. The heating device 5 is located below the hot air channel and heats and shapes the zipper belt during the feeding process. The heating device 5 includes a hot steam nozzle. After the hot steam nozzle is activated, it sprays hot steam upward through the hot air channel to heat the zipper belt. The heating device 5 can also adopt other heating structures commonly found on the market. A heating device 5 is installed below the feeding device 2 to allow the zipper belt to be heated for a sufficient time. The zipper limiting plate 23 and the feeding foot 22 ensure that the zipper belt does not deform while being heated. The zipper belt is conveyed forward while being heated, allowing the zipper belt fabric fibers to fully expand and maintain a stable shape, thereby improving the pre-expansion and shaping effect of the pre-expansion device 3.

[0028] In the above technical solution: the front pressure roller group 31 includes a front upper pressure roller 311 and a front lower pressure roller arranged opposite each other and rolling synchronously; the rear pressure roller group 32 includes a rear upper pressure roller 321 and a rear lower pressure roller arranged opposite each other and rolling synchronously. The gap between the front upper pressure roller 311 and the front lower pressure roller and the gap between the rear upper pressure roller 321 and the rear lower pressure roller form a pre-expansion channel for the zipper tape. The front upper pressure roller 311 and the rear upper pressure roller 321 abut against the upper surface of the zipper tape, and the front lower pressure roller and the rear lower pressure roller abut against the lower surface of the zipper tape. Two front upper pressure rollers 311 are arranged side by side, abutting against the upper surface of the fabric on both sides of the zipper belt respectively; two front lower pressure rollers are arranged side by side, abutting against the lower surface of the fabric on both sides of the zipper belt respectively; correspondingly, two rear upper pressure rollers 321 are arranged side by side, abutting against the upper surface of the fabric on both sides of the zipper belt respectively; two rear lower pressure rollers are arranged side by side, abutting against the lower surface of the fabric on both sides of the zipper belt respectively.

[0029] In the above technical solution, the pre-expansion device 3 further includes a first drive mechanism for driving the front pressure roller group 31 to rotate and a second drive mechanism for driving the rear pressure roller group 32 to rotate. The first drive mechanism includes a first drive motor 33 and a first gear transmission assembly 34. The first gear transmission assembly 34 includes a first output gear 341, a first transmission gear 342, a first pressure roller gear 343, and a second pressure roller gear 344. The first output gear 341 is fixed on the output shaft of the first drive motor 33. The first transmission gear 342 meshes with the first output gear 341. The diameter of the first transmission gear 342 is larger than the diameter of the first output gear 341. The first pressure roller gear 343 is coaxially fixed with the first transmission gear 342 and the front lower pressure roller, respectively. The second pressure roller gear 344 meshes with the first pressure roller gear 343 and is coaxially fixed with the front upper pressure roller 311.

[0030] In the above technical solution: the second drive mechanism includes a second drive motor 35 and a second gear transmission assembly 36. The second gear transmission assembly 36 includes a second output gear 361, a second transmission gear 362, a third pressure gear 363, and a fourth pressure gear 364. The second output gear 361 is fixed on the output shaft of the second drive motor 35. The second transmission gear 362 meshes with the second output gear 361, and the diameter of the second transmission gear 362 is larger than the diameter of the second output gear 361. The third pressure gear 363 is coaxially fixed with the second transmission gear 362 and the lower rear pressure wheel, respectively. The fourth pressure gear 364 meshes with the third pressure gear 363 and is coaxially fixed with the upper rear pressure wheel 321. The first transmission gear 342 is staggered from the second transmission gear 362, the third pressure gear 363 is staggered from the first pressure gear 343, and the fourth pressure gear 364 is staggered from the second pressure gear 344.

[0031] The first drive motor 33 drives the first output gear 341 to rotate, and the first transmission gear 342 is driven to rotate synchronously, thereby driving the first pressure roller gear 343, the front lower pressure roller, the second pressure roller gear 344, and the front upper pressure roller 311 to rotate. The second drive motor 35 drives the second output gear 361 to rotate, and the second transmission gear 362 is driven to rotate synchronously, thereby driving the third pressure roller gear 363, the rear lower pressure roller, the fourth pressure roller gear 364, and the rear upper pressure roller 321 to rotate. The first drive motor 33 and the first gear transmission assembly 34 are each provided with two sets, driving two front upper pressure rollers 311 and two front lower pressure rollers respectively. The second drive motor 35 and the second gear transmission assembly 36 are each provided with two sets, driving two rear upper pressure rollers 321 and two rear lower pressure rollers respectively. The diameter of the first transmission gear 342 is larger than the diameter of the first output gear 341, and the diameter of the second transmission gear 362 is larger than the diameter of the second output gear 361, which increases the torque and reduces the speed.

[0032] In the above technical solution: the feeding device 4 includes a feeding channel 41, a receiving movable plate 42, a receiving cylinder 43, and two arc-shaped zipper guide rails 44. The feeding channel 41 is located at the tail of the pre-expansion device 3. The pre-expanded zipper tape is guided through the feeding channel 41 and then fed. The feeding channel 41 is arc-shaped and wider at the front and narrower at the back. The end of the feeding channel 41 closest to the pre-expansion device 3 is the feeding port 411. The two sides of the end of the feeding channel 41 away from the pre-expansion device 3 extend downward to form the feeding port 412. The bottom of the feeding port 411 is located below the front lower pressure roller, and the top of the feeding port 411 is located above the front upper pressure roller 311. The width of the feeding port 411 is greater than the width of the feeding port 412, and the width of the feeding port 412 is greater than the thickness of the zipper tape.

[0033] In the above technical solution: a downward-sloping arc-shaped feeding chute is formed between the two zipper guide rails 44. The feeding chute includes a receiving chute 441 and a material-carrying chute 442. The receiving chute 441 is located at the bottom of the discharge port 412. The width of the receiving chute 441 is greater than or equal to the width of the discharge port 412, ensuring that the lower stop portion extending from the discharge port 412 can smoothly pass through the receiving chute 441, ensuring smooth feeding. The width of the receiving chute 441 is greater than the width of the material-carrying chute 442, the width of the zipper is greater than the width of the material-carrying chute 442, and the width of the chain is greater than the width of the chain. The receiving chute 441 and the material-carrying chute 442 have an arc-shaped transition. A limiting block 443 is provided at the end of the material-carrying chute 442 to prevent the zipper belt on the material-carrying chute 442 from sliding out.

[0034] In the above technical solution: the receiving cylinder 43 is fixed on the top surface of the frame 1, and the receiving movable plate 42 is located on the side of the discharge port 412. The receiving movable plate 42 is inclined and connected to the receiving cylinder 43. A sensor is also included, which can be fixed below the receiving slide 441. When the sensor detects that the bottom stop of the zipper belt has passed through the receiving slide 441, the sensor transmits a command to the receiving cylinder 43, causing the receiving cylinder 43 to move the receiving movable plate 42 forward. The receiving movable plate 42 presses against the side wall of the discharge port 412, causing the width of the discharge port 412 to continuously decrease until the width of the discharge port 412 is less than the width of the zipper and the same as the width of the material slide 442. This ensures that after the entire zipper belt is pre-expanded, it is in a suspended loading / unloading channel state, slides downward with the loading channel, and is limited and held in the loading channel by the limiting block 443. The sensor can also be fixed on the feeding stand 27 of the feeding device 2. When the sensor detects the pull of the zipper belt, it determines that the lower stop of the zipper belt has passed the pre-expansion device 3, the discharge channel 41 and the receiving slide 441 according to the length of the zipper belt, thereby transmitting the command to the receiving cylinder 43.

[0035] The bottom stop of the zipper tape first passes through the pre-expansion device 3, extends out of the discharge channel 41, and then passes through the receiving slide 441; then the sensor transmits a command to the receiving cylinder 43, causing the receiving cylinder 43 to drive the receiving movable plate 42 forward, and the receiving movable plate 42 presses against the side wall of the discharge port 412, causing the discharge port 412 to... The width of the zipper tape continues to decrease until the width of the discharge port 412 is less than the width of the zipper tape and the same as the width of the material chute 442. After the zipper tape extends out of the discharge channel 41, it contacts the top surface of the receiving movable plate 42. The suspended zipper tape moves to the material chute 442 after being guided by the inclined receiving movable plate 42. The zipper tape contacts the top surface of the material chute 442, so that the zipper tape is suspended on the material chute 442 and moves down with the material chute 442 until it contacts the limiting block 443, waiting for the subsequent unloading claw structure to take it away or waiting for manual material removal. This ensures that the zipper tape is in a neat and straight hanging state when the material is removed, making the arrangement more neat and convenient for subsequent storage and packaging.

[0036] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0037] Although this article extensively uses the following components: frame 1; feeding table 11; feeding device 2; feeding hook 21; feeding presser foot 22; zipper limit plate 23; feeding motor 24; feeding rack 25; feeding guide slide 26; feeding stand 27; feeding base plate 28; pre-expansion device 3; front pressure roller group 31; front upper pressure roller 311; rear pressure roller group 32; rear upper pressure roller 321; first drive motor 33; first gear transmission assembly 34; first output gear 341; first transmission gear 342; first pressure roller The terms used include: gear 343; second pressure wheel gear 344; second drive motor 35; second gear transmission assembly 36; second output gear 361; second transmission gear 362; third pressure wheel gear 363; fourth pressure wheel gear 364; feeding device 4; discharge channel 41; inlet 411; outlet 412; receiving movable plate 42; receiving cylinder 43; zipper guide rail 44; receiving slide 441; material handling slide 442; heating device 5, etc., but the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

[0038] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this invention or exceeding the scope defined by the appended claims.

Claims

1. A zipper belt pre-expansion machine, comprising a frame (1) and a zipper belt, wherein the zipper belt includes a chain, an upper stop, a lower stop, and a zipper lock, the upper stop and the lower stop being located at opposite ends of the chain, and the sides of the upper stop and the lower stop protruding from the chain, characterized in that... The frame (1) is equipped with a feeding device (2), a pre-expansion device (3), a discharge device (4), and a heating device (5). The feeding device (2) transmits the zipper belt to the pre-expansion device (3). The heating device (5) is located below the feeding device (2) and heats the zipper belt during the feeding process. The pre-expansion device (3) includes a front pressure roller group (31) and a rear pressure roller group (32). The speed of the front pressure roller group (31) is greater than the speed of the rear pressure roller group (32). The zipper belt is conveyed from the rear pressure roller group (32) to the front pressure roller group (31). The differential speed setting between the front pressure roller group (31) and the rear pressure roller group (32) pre-expands the zipper belt. After pre-expansion, the zipper belt is discharged through the discharge device (4).

2. The zipper tape pre-expansion machine according to claim 1, characterized in that... The feeding device (2) includes a feeding power source, a feeding hook (21), a feeding presser foot (22), and two zipper limiting plates (23) arranged opposite to each other. The frame (1) includes a feeding table (11). The zipper belt is placed on the feeding table (11). The lower stop side protrudes from the zipper belt to form a step. The step abuts against the feeding hook (21). The feeding power source drives the feeding hook (21) and the zipper belt to move towards the pre-expansion device (3). During the movement, the zipper belt is located between the two zipper limiting plates (23). The bottom of the feeding presser foot (22) presses down on the zipper belt.

3. A zipper tape pre-expansion machine according to claim 2, characterized in that... The feeding power source includes a feeding motor (24), a feeding rack (25), a feeding gear, and a feeding guide block (26). The feeding motor (24) and the feeding guide block (26) are both fixed to the bottom of the feeding table (11). The feeding guide block (26) has a guide channel inside, and the side of the guide channel has a meshing opening. The feeding rack (25) passes through the guide channel and can move relative to the feeding guide block (26) and the feeding table (11). The feeding gear is fixed on the output shaft of the feeding motor (24). The feeding gear meshes with the feeding rack (25) through the meshing opening. The feeding hook (21) is fixed to one end of the feeding rack (25) near the pre-expansion device (3). The feeding motor (24) drives the feeding gear to rotate, thereby driving the feeding rack (25) and the feeding hook (21) to move and feed.

4. A zipper tape pre-expansion machine according to claim 2, characterized in that... The feeding device (2) also includes a feeding stand (27) fixed on the frame (1) and two feeding base plates (28). The feeding presser foot (22) includes a horizontal contact part and an arc-shaped elastic part. The top of the arc-shaped elastic part is fixed on the feeding stand (27). A hot air channel is formed between the two feeding base plates (28). The width of the hot air channel is smaller than the width of the zipper belt. The feeding hook (21) drives the zipper belt to move onto the hot air channel. The heating device (5) is located below the hot air channel. The heating device (5) includes a hot steam nozzle. After the hot steam nozzle is started, it sprays hot steam upward through the hot air channel to heat the zipper belt.

5. A zipper tape pre-expansion machine according to claim 1, characterized in that... The front pressure roller assembly (31) includes a front upper pressure roller (311) and a front lower pressure roller that are arranged opposite each other and roll synchronously. The rear pressure roller assembly (32) includes a rear upper pressure roller (321) and a rear lower pressure roller that are arranged opposite each other and roll synchronously. The gap between the front upper pressure roller (311) and the front lower pressure roller and the gap between the rear upper pressure roller (321) and the rear lower pressure roller constitute the pre-expansion channel of the zipper tape. The front upper pressure roller (311) and the rear upper pressure roller (321) abut against the upper surface of the zipper tape, and the front lower pressure roller and the rear lower pressure roller abut against the lower surface of the zipper tape.

6. A zipper tape pre-expansion machine according to claim 5, characterized in that... The pre-expansion device (3) further includes a first drive mechanism for driving the front pressure roller group (31) to rotate and a second drive mechanism for driving the rear pressure roller group (32) to rotate. The first drive mechanism includes a first drive motor (33) and a first gear transmission assembly (34). The first gear transmission assembly (34) includes a first output gear (341), a first transmission gear (342), a first pressure roller gear (343), and a second pressure roller gear (344). The first output gear (341) is fixed on the output shaft of the first drive motor (33). The first transmission gear (342) meshes with the first output gear (341). The diameter of the first transmission gear (342) is larger than the diameter of the first output gear (341). The first pressure roller gear (343) is coaxially fixed with the first transmission gear (342) and the front lower pressure roller, respectively. The second pressure roller gear (344) meshes with the first pressure roller gear (343) and is coaxially fixed with the front upper pressure roller (311). The second drive mechanism includes a second drive motor (35) and a second gear transmission assembly (36). The second gear transmission assembly (36) includes a second output gear (361), a second transmission gear (362), a third pressure gear (363), and a fourth pressure gear (364). The second output gear (361) is fixed on the output shaft of the second drive motor (35). The second transmission gear (362) meshes with the second output gear (361). The diameter of the second transmission gear (362) is larger than that of the second output gear (361). The diameter of the third pressure wheel gear (363) is fixed coaxially with the second transmission gear (362) and the rear lower pressure wheel respectively. The fourth pressure wheel gear (364) meshes with the third pressure wheel gear (363) and is fixed coaxially with the rear upper pressure wheel (321). The first transmission gear (342) and the second transmission gear (362) are staggered front and rear. The third pressure wheel gear (363) and the first pressure wheel gear (343) are staggered front and rear. The fourth pressure wheel gear (364) and the second pressure wheel gear (344) are staggered front and rear. The first drive motor (33) drives the first output gear (341) to rotate, and the first transmission gear (342) is driven to rotate synchronously, driving the first pressure wheel gear (343), the front lower pressure wheel, the second pressure wheel gear (344), and the front upper pressure wheel (311) to rotate; the second drive motor (35) drives the second output gear (361) to rotate, and the second transmission gear (362) is driven to rotate synchronously, driving the third pressure wheel gear (363), the rear lower pressure wheel, the fourth pressure wheel gear (364), and the rear upper pressure wheel (321) to rotate. The diameter of the first transmission gear (342) is larger than the diameter of the first output gear (341), and the diameter of the second transmission gear (362) is larger than the diameter of the second output gear (361).

7. A zipper tape pre-expansion machine according to claim 5, characterized in that... The feeding device (4) includes a discharge channel (41), which is located at the tail of the pre-expansion device (3). The discharge channel (41) is arc-shaped and wider at the front than at the back. The end of the discharge channel (41) near the pre-expansion device (3) is the inlet (411). The two sides of the end of the discharge channel (41) away from the pre-expansion device (3) extend downward to form the discharge outlet (412). The bottom of the inlet (411) is located below the front lower pressure roller, and the top of the inlet (411) is located above the front upper pressure roller (311). The width of the inlet (411) is greater than the width of the discharge outlet (412), and the width of the discharge outlet (412) is greater than the thickness of the zipper tape.

8. A zipper tape pre-expansion machine according to claim 7, characterized in that... The feeding device (4) also includes two arc-shaped zipper guide rails (44), and an arc-shaped downward inclined feeding slide is formed between the two zipper guide rails (44). The feeding slide includes a receiving slide (441) and a material-filling slide (442). The receiving slide (441) is located at the bottom of the discharge port (412). The width of the receiving slide (441) is greater than or equal to the width of the discharge port (412). The width of the receiving slide (441) is greater than the width of the material-filling slide (442). The width of the zipper is greater than the width of the material-filling slide (442) and the width of the chain belt. The receiving slide (441) and the material-filling slide (442) are arc-shaped transitions. The end of the material-filling slide (442) is provided with a limiting block (443).

9. A zipper tape pre-expansion machine according to claim 8, characterized in that... The feeding device (4) also includes a receiving movable plate (42) and a receiving cylinder (43). The receiving cylinder (43) is fixed on the top surface of the frame (1). The receiving movable plate (42) is located on the side of the discharge port (412). The receiving movable plate (42) is inclined and connected to the receiving cylinder (43). It also includes a sensor. When the sensor detects that the bottom stop of the zipper tape has passed through the receiving slide (441), the sensor transmits a command to the receiving cylinder (43), causing the receiving cylinder (43) to drive the receiving movable plate (42) forward. The receiving movable plate (42) presses against the side wall of the discharge port (412), causing the discharge port (412) to... The width of the zipper tape continues to decrease until the width of the discharge port (412) is less than the width of the zipper tape and the same as the width of the material chute (442). After the zipper tape extends out of the discharge channel (41), it contacts the top surface of the receiving movable plate (42). The suspended zipper tape moves to the material chute (442) after being guided by the inclined receiving movable plate (42). The zipper tape contacts the top surface of the material chute (442), so that the zipper tape is suspended on the material chute (442) and moves downward with the material chute (442) until it contacts the limiting block (443).

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