Zipper tape pre-expanding equipment

Abstract

The invention relates to zipper tape pre-expanding equipment which comprises a workbench, a feeding device, a pre-expanding device and a discharging device. The feeding device is provided with a synchronous conveying pressing belt, and a heating and shaping device is arranged below the conveying pressing belt. The defects that in the prior art, heating and shaping time is short, and the pre-expanding and shaping effect is poor are overcome, the zipper tape is fully heated before pre-expanding, the pre-expanding effect is good, and deformation is not prone to occurring.

Description

Technical Field

[0001] The invention relates to the technical field of zipper tape processing equipment, in particular to a zipper tape pre-expansion device. Background Art

[0002] The chain belt is straight after being manufactured in the factory. When using the straight zipper, it is easy to cause the clothes to lift and the zipper to be difficult to close. The zipper needs to be pre-expanded so that the chain belt has a certain inner arc. The existing technology uses the zipper molding equipment to pre-expand and shape the zipper. The zipper has an inner arc characteristic after shaping, and the inner arc of the zipper is not easy to deform, which improves the quality of the zipper and prevents the zipper from arching during use.

[0003] The Chinese utility model with the authorization announcement number CN216907070U discloses a zipper pre-expansion machine, including a workbench, a feeding device, a transmission roller device, a heat setting device and a feeding device. The transmission roller device is provided with two sets of differential transmission roller assemblies, each set of transmission roller assemblies includes a first transmission roller and a second transmission roller located above the first transmission roller, the first transmission roller and the second transmission roller act on the upper and lower sides of the zipper tape to be processed respectively, and transmit the zipper tape forward, wherein the speed at which the transmission roller assembly located in the front drives the zipper tape to move forward is greater than the speed at which the transmission roller assembly located in the rear drives the zipper tape to move forward; and also includes a heat setting device, which is arranged between two adjacent sets of transmission roller assemblies, and is used to heat and set the zipper tape transmitted between the two adjacent sets of transmission roller assemblies.

[0004] This technical solution utilizes the differential movement of the front and rear drive rollers to pre-expand the zipper, and arranges a heat setting device between the two sets of drive rollers to heat the zipper, thereby promoting rapid setting of the zipper after pre-expansion.

[0005] However, the defect of this technical solution is that its heat setting device is arranged between two sets of driving rollers, the heating time is too short, and the pre-expansion and setting effect cannot be achieved, and the inner arc of the zipper is difficult to form. Summary of the invention

[0006] The purpose of the present invention is to provide a zipper tape pre-expansion device, which overcomes the defects of the prior art that the heating and shaping time is short and the pre-expansion and shaping effect is poor.

[0007] To achieve the above object, the technical solution of the present invention is: A zipper tape pre-expansion device comprises a workbench, a feeding device and a pre-expansion device arranged on the workbench, and a feeding device arranged below the workbench; wherein the pre-expansion device is composed of a front pressing wheel group and a rear pressing wheel group, the speed of the front pressing wheel group is greater than the speed of the rear pressing wheel group, and the zipper tape is transmitted from the rear pressing wheel group to the direction of the front pressing wheel group; the front pressing wheel group comprises a front upper pressing wheel and a front lower pressing wheel which are arranged relatively to each other and roll synchronously, and the rear pressing wheel group comprises a rear upper pressing wheel and a rear lower pressing wheel which are arranged relatively to each other and roll synchronously; the gap between the front upper pressing wheel and the front lower pressing wheel and the gap between the rear upper pressing wheel and the rear lower pressing wheel constitute a pre-expansion channel for the zipper tape, the front upper pressing wheel and the rear upper pressing wheel abut against the upper surface of the zipper tape, and the front lower pressing wheel and the rear lower pressing wheel abut against the lower surface of the zipper tape; The feeding device includes a conveying belt and a pressing plate; the gap between the conveying belt and the upper surface of the workbench constitutes a zipper belt conveying channel; the conveying belt conveys the zipper belt to the pre-expansion channel, and the zipper belt is conveyed to the unloading device through the pre-expansion channel; a heating and shaping device is also provided, and the heating and shaping device is arranged below the conveying belt.

[0008] Two conveyor pressing belts are arranged, the two conveyor pressing belts are arranged in parallel and roll synchronously, and the two conveyor pressing belts are respectively pressed against the upper surfaces of the fabrics on both sides of the zipper belt.

[0009] The feeding device is also provided with a synchronous wheel, and the conveying pressure belt is driven by the synchronous wheel. A first lifting mechanism is provided on the synchronous wheel to drive the lifting of the synchronous wheel to control the lifting of the conveying pressure belt.

[0010] A first cylinder is connected to the pressing plate to control its lifting; a second cylinder is connected to the pressing plate to control its forward and backward movement along the zipper belt transmission direction.

[0011] A positioning plate for the zipper tape is arranged on the upper surface of the workbench, and the positioning plate is located below the pressing plate.

[0012] Two front upper pressing wheels are arranged in parallel, respectively abutting against the upper surfaces of the fabrics on both sides of the zipper tape; two front lower pressing wheels are arranged in parallel correspondingly, respectively abutting against the lower surfaces of the fabrics on both sides of the zipper tape; Two rear upper pressing wheels are arranged in parallel, respectively abutting against the upper surfaces of the fabrics on both sides of the zipper belt; two rear lower pressing wheels are arranged in parallel correspondingly, respectively abutting against the lower surfaces of the fabrics on both sides of the zipper belt.

[0013] A second lifting mechanism is provided to drive the front upper pressing wheel and the rear upper pressing wheel to simultaneously lift and lower relative to the front lower pressing wheel and the rear lower pressing wheel.

[0014] The unloading device is arranged below the workbench, and includes a discharging cylinder arranged on one side of the workbench and connected to the pre-expansion device, a material clamping mechanism, a material receiving platform, and a packaging mechanism arranged on the other side of the workbench. The discharging cylinder is provided with a discharging port under the workbench; a material clamping mechanism and a material receiving platform are arranged between the discharging port and the packaging mechanism; The material clamping mechanism is located below the workbench and is slidably arranged between the material discharging port and the packaging mechanism. A material receiving platform is arranged below the material clamping mechanism and is slidably arranged to approach or leave the packaging mechanism. The material receiving platform is also provided with a pushing plate for pushing the zipper tape packed by the packing mechanism away from the material receiving platform.

[0015] The clamping mechanism includes a rotating cylinder, a finger cylinder and a clamping arm. The finger cylinder is arranged on the rotating cylinder. The finger cylinder drives the opening / closing of the clamping arm, and the rotating cylinder controls the rotation of the clamping arm. A first slide rail and a slider are arranged below the workbench. One side of the slider is connected to the clamping mechanism, and the other side is connected to the first slide rail. The slider is connected to the rotating cylinder of the clamping mechanism.

[0016] A second slide rail is arranged below the material receiving platform, and the material receiving platform is arranged on the second slide rail; A third lifting mechanism is provided to be connected to the material receiving platform, and when the material receiving platform slides toward / away from the packaging mechanism, the material receiving platform is driven to rise / fall.

[0017] The advantages of the present invention are as follows: 1. A conveyor pressure belt is arranged on the feeding device, so that the zipper belt can be smoothly conveyed; 2. A pressure plate and a positioning plate are arranged before the conveyor pressure belt, so that the zipper belt does not deviate when conveyed forward; 3. A heating and shaping device is arranged below the conveyor pressure belt, so that the zipper belt can get a sufficient heating time, and the conveyor pressure belt can prevent the zipper belt from deforming while being heated. The zipper belt is conveyed forward while being heated, and the zipper belt fabric fibers can be fully stretched and keep a stable shape; 4. The rotating clamping mechanism rotates counterclockwise during transportation after clamping the zipper belt, so that the zipper belt will not be entangled on the clamping arm, so that the zipper belt will not be in a disorderly manner when it falls on the material receiving platform, which is convenient for packaging and sorting; 5. The unloading device realizes the automation of collecting and packaging the zipper belt, which greatly improves the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The structure of the present invention is schematically shown in FIG. Figure 1 ; Figure 2 The structure of the present invention is schematically shown in FIG. Figure 2 ; Figure 3 It is a partial structural schematic diagram of the feeding device and the pre-expansion device of the present invention; Figure 4 It is a structural schematic diagram of the pre-expansion device of the present invention; Figure 5 It is a structural schematic diagram of the pressing plate and the positioning plate of the present invention; Figure 6 It is a schematic structural diagram of the blanking device of the present invention; Figure 7 The clamping mechanism structure of the present invention is schematically shown in FIG. Figure 1 ; Figure 8 The clamping mechanism structure of the present invention is schematically shown in FIG. Figure 2 ; Fig. 9 It is a schematic diagram of a zipper tape; In the figure: 1-workbench; 2-feeding device; 21-conveying pressure belt; 22-pressing plate; 23-positioning plate; 24-first cylinder; 25-second cylinder; 211-synchronous wheel; 3-pre-expansion device; 31-front pressure wheel group; 311-front upper pressure wheel; 312-front lower pressure wheel; 32-rear pressure wheel group; 321-rear upper pressure wheel; 322-rear lower pressure wheel; 33-second lifting mechanism; 4-unloading device; 41-discharging barrel; 411-discharging port; 42-packing mechanism; 43-clamping mechanism; 431-rotating cylinder; 432-finger cylinder; 433-clamping arm; 44-material receiving platform; 45-push plate; 46-first slide rail; 47-second slide rail; 48-third lifting mechanism; 49-slider; 5-zipper tape. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the accompanying drawings, which are only used for exemplary description and cannot be understood as limiting the present invention.

[0020] In order to more concisely describe the present embodiment, some parts known to those skilled in the art but not related to the main content of the present invention are omitted in the drawings or descriptions. In addition, for the convenience of description, some parts in the drawings are omitted, enlarged or reduced, but they do not represent the size or entire structure of the actual product.

[0021] The present invention discloses a zipper tape pre-expansion device, such as Figure 1-8 As shown, it includes a workbench 1, a feeding device 2 and a pre-expansion device 3 arranged on the workbench 1, and a unloading device 4 arranged below the workbench 1.

[0022] Among them, Figure 2-4 As shown, the pre-expansion device 3 is composed of a front pressure wheel group 31 and a rear pressure wheel group 32. The speed of the front pressure wheel group 31 is greater than the speed of the rear pressure wheel group 32. This differential setting is effective for Fig. 9 The zipper tape 5 shown in the figure plays a pre-expansion role. The zipper tape 5 is transmitted from the rear pressing wheel group 32 to the front pressing wheel group 31; Figure 3 , Figure 4As shown, the front pressing wheel group 31 includes a front upper pressing wheel 311 and a front lower pressing wheel 312 which are arranged relatively to each other and roll synchronously, and the rear pressing wheel group 32 includes a rear upper pressing wheel 321 and a rear lower pressing wheel 322 which are arranged relatively to each other and roll synchronously; the gap between the front upper pressing wheel 311 and the front lower pressing wheel 312 and the gap between the rear upper pressing wheel 321 and the rear lower pressing wheel 322 constitute a pre-expansion channel for the zipper tape 5, the front upper pressing wheel 311 and the rear upper pressing wheel 321 are against the upper surface of the zipper tape 5, and the front lower pressing wheel 3 12 and the rear lower pressing wheel 322 are against the lower surface of the zipper tape 5; preferably, two front upper pressing wheels 311 are arranged in parallel, respectively against the upper surfaces of the fabric on both sides of the zipper tape 5; two front lower pressing wheels 312 are correspondingly arranged in parallel, respectively against the lower surfaces of the fabric on both sides of the zipper tape 5; correspondingly, two rear upper pressing wheels 321 are arranged in parallel, respectively against the upper surfaces of the fabric on both sides of the zipper tape 5; two rear lower pressing wheels 322 are correspondingly arranged in parallel, respectively against the lower surfaces of the fabric on both sides of the zipper tape 5.

[0023] Furthermore, a second lifting mechanism 33 is provided to drive the front upper pressing wheel 311 and the rear upper pressing wheel 321 to rise relative to the front lower pressing wheel 312 and the rear lower pressing wheel 322 when the zipper tape 5 is conveyed from the feeding device 2, that is, to lift the front upper pressing wheel 311 and the rear upper pressing wheel 321 at the same time; when the zipper tape 5 enters between the rear upper pressing wheel 321 and the rear lower pressing wheel 322, the second lifting mechanism 33 drives the front upper pressing wheel 311 and the rear upper pressing wheel 321 to descend relative to the front lower pressing wheel 312 and the rear lower pressing wheel 322 to press the fabric on both sides of the zipper tape 5 and pre-expand the zipper tape 5.

[0024] like Figure 1-3 As shown, the feeding device 2 includes a conveying belt 21 and a pressing plate 22, wherein the gap between the conveying belt 21 and the upper surface of the workbench 1 constitutes a conveying channel for the zipper tape 5; the pressing plate 22 is a component for conveying the zipper tape 5 to the conveying channel of the conveying belt 21. The pressing plate 22 can move forward and backward along the conveying direction of the zipper tape 5, and can be raised and lowered on the upper surface of the workbench 1. A positioning plate 23 for the zipper tape 5 is provided on the upper surface of the workbench 1, and the positioning plate 23 is located below the pressing plate 22, so as to facilitate the positioning of the zipper tape 5 when it is placed.

[0025] like Figure 5 As shown, a first cylinder 24 is connected to the pressing plate 22 to control its lifting and lowering on the upper surface of the workbench 1; a second cylinder 25 is connected to the pressing plate 22 to control its forward and backward movement along the conveying direction of the zipper tape 5. During operation, the zipper tape 5 is placed under the pressing plate 22, the first cylinder 24 drives the pressing plate 22 to descend and press on the zipper tape 5, and the second cylinder 25 drives the pressing plate 22 to move toward the conveying belt 21 to convey the zipper tape 5 to the conveying channel below the conveying belt 21.

[0026] Furthermore, the feeding device 2 is also provided with a synchronous wheel 211, and the conveyor belt 21 is mounted on the synchronous wheel 211 and driven by the synchronous wheel 211. Moreover, the synchronous wheel 211 is provided with a first lifting mechanism to drive the lifting of the synchronous wheel 211 to control the lifting of the conveyor belt 21. When the pressing plate 22 conveys the zipper belt 5 toward the conveyor belt 21, the first lifting mechanism drives the synchronous wheel 211 to rise. When the zipper belt 5 enters the conveying channel between the conveyor belt 21 and the workbench 1, the first lifting mechanism drives the synchronous wheel 211 to descend. The two conveyor belts 21 press on the fabric on both sides of the zipper belt 5 to convey the zipper belt 5 to the pre-expansion device 3.

[0027] The conveyor pressing belt 21 then conveys the zipper belt 5 to the pre-expansion channel, and the zipper belt 5 is conveyed to the unloading device 4 through the pre-expansion channel; preferably, two conveyor pressing belts 21 are arranged, and the two conveyor pressing belts 21 are arranged in parallel and roll synchronously, and the two conveyor pressing belts 21 are respectively against the upper surface of the fabric on both sides of the zipper belt 5, so that the transmission of the zipper belt 5 is more stable.

[0028] A heating and shaping device is also provided, which is arranged below the conveyor belt 21. In this way, the zipper belt 5 is slowly heated during the process of being conveyed forward in the conveying channel under the conveyor belt 21, so that the fibers of the fabric on both sides of the zipper belt 5 are fully stretched, making the subsequent pre-expansion more sufficient, the effect better, and the shaping more stable.

[0029] The unloading device 4 is arranged below the workbench 1. Figure 5-8 As shown, the unloading device 4 includes a discharging cylinder 41 arranged on one side of the workbench 1 and connected to the pre-expansion device 3, a clamping mechanism 43, a material receiving platform 44 and a packaging mechanism 42 arranged on the other side of the workbench 1. The discharging cylinder 41 is provided with a discharging port 411 under the workbench; the clamping mechanism 43 and the material receiving platform 44 are arranged between the discharging port 411 and the packaging mechanism 42.

[0030] The clamping mechanism 43 is slidably arranged below the workbench 1, and a material receiving platform 44 is slidably arranged below the clamping mechanism 43. The clamping mechanism 43 slides back and forth between the discharge port 411 and the packaging mechanism 42. The zipper tape 5 pre-expanded by the pre-expansion device 3 slides down from the discharge port 411. The clamping mechanism 43 clamps the zipper tape 5 and slides to the side of the material receiving platform 44 close to the packaging mechanism 42, releases the zipper tape 5, and falls on the material receiving platform 44. After receiving a certain number of zipper tapes 5, the material receiving platform 44 slides toward the packaging mechanism 42, and sends the zipper tape 5 to the packaging mechanism 42 for packaging. After the zipper tape 5 is packaged, the material receiving platform 44 slides away from the packaging mechanism 42.

[0031] A pushing plate 45 is also provided on the receiving platform 44 . The pushing plate 45 reciprocates on the upper surface of the receiving platform 44 in a direction perpendicular to the movement of the clamping mechanism 43 , and pushes the packaged zipper tape 5 out from the receiving platform 44 .

[0032] like Figure 7 , Figure 8 As shown, the clamping mechanism 43 is a rotatable mechanism, including a rotating cylinder 431, a finger cylinder 432 and a clamping arm 433. The finger cylinder 432 is arranged on the rotating cylinder 431, and the finger cylinder 432 drives the opening / closing of the clamping arm 433. The rotating cylinder 431 controls the rotation of the clamping arm 433. The reason for setting the rotating clamping mechanism 43 is to facilitate the transportation of the pre-expanded zipper tape 5. At the discharge port 411, the clamping arm 433 is in a horizontal state. When the zipper tape 5 is ready to be clamped, the finger cylinder 432 drives the clamping arm 433 to open, and the zipper tape 5 is discharged from the discharge port. When 411 slides down, the finger cylinder 432 drives the clamping arm 433 to close, clamp the zipper tape 5, and slide to the other side of the workbench 1, sliding to a position close to the packaging mechanism 42, or during the sliding process, the rotating cylinder 431 drives the clamping arm 433 to rotate counterclockwise to an upright state and then to a horizontal state, so as to ensure that the zipper tape 5 will not be entangled on the clamping arm 433. When reaching the predetermined position, the finger cylinder 432 drives the clamping arm 433 to open, release the zipper tape 5 to the material receiving platform 44, and then slide back to the discharge port 411, waiting to clamp the next zipper tape 5.

[0033] Preferably, a first slide rail 46 and a slider 49 are provided below the workbench 1 . One side of the slider 49 is connected to the clamping mechanism 43 , and the other side is connected to the first slide rail 46 . The slider 49 is connected to the rotating cylinder 431 of the clamping mechanism 43 .

[0034] A second slide rail 47 is provided below the material receiving platform 44, and the material receiving platform 44 is provided on the second slide rail 47; Furthermore, a third lifting mechanism 48 is provided to be connected to the material receiving platform 44. After the material receiving platform 44 receives a preset number of zipper tapes 5 from the clamping mechanism 43, the material receiving platform 44 slides toward the packing mechanism 42. When it reaches the packing mechanism 42, or during the sliding process, the third lifting mechanism 48 drives the material receiving platform 44 to rise, and sends the zipper tape 5 on the material receiving platform 44 to the packing mechanism 42 for packing. After the packing is completed, the material receiving platform slides away from the packing mechanism 42, and the third lifting mechanism 48 drives the material receiving platform 44 to descend and return to its original position, and the pushing plate 45 pushes the zipper tape 5 on the material receiving platform 44 out.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. That is, any equivalent changes and modifications made according to the content of the patent application scope of the present invention should be within the technical scope of the present invention.

Claims

1. A zipper tape pre-expansion device, comprising a workbench (1), a feeding device (2) and a pre-expansion device (3) arranged on the workbench (1), and a feeding device (4) arranged below the workbench (1); wherein: The pre-expansion device (3) is composed of a front pressing wheel group (31) and a rear pressing wheel group (32). The speed of the front pressing wheel group (31) is greater than that of the rear pressing wheel group (32). The zipper tape (5) is transmitted by the rear pressing wheel group (32) toward the front pressing wheel group (31). The front pressing wheel group (31) includes a front upper pressing wheel (311) and a front lower pressing wheel (312) which are arranged opposite to each other and roll synchronously. The rear pressing wheel group (32) includes a rear pressing wheel (311) and a front lower pressing wheel (312) which are arranged opposite to each other and roll synchronously. An upper pressing wheel (321) and a rear lower pressing wheel (322); a gap between the front upper pressing wheel (311) and the front lower pressing wheel (312) and a gap between the rear upper pressing wheel (321) and the rear lower pressing wheel (322) form a pre-expansion channel for the zipper tape (5); the front upper pressing wheel (311) and the rear upper pressing wheel (321) abut against the upper surface of the zipper tape (5); and the front lower pressing wheel (312) and the rear lower pressing wheel (322) abut against the lower surface of the zipper tape (5); The invention is characterized in that: the feeding device (2) comprises a conveying pressing belt (21) and a pressing plate (22); the gap between the conveying pressing belt (21) and the upper surface of the workbench (1) constitutes a conveying channel for the zipper tape (5); the conveying pressing belt (21) conveys the zipper tape (5) to the pre-expansion channel, and the zipper tape (5) is conveyed to the unloading device (4) through the pre-expansion channel; and a heating and shaping device is also provided, and the heating and shaping device is provided below the conveying pressing belt (21).

2. The zipper tape pre-expansion device according to claim 1, characterized in that: Two conveyor pressing belts (21) are provided, and the two conveyor pressing belts (21) are arranged in parallel and roll synchronously, and the two conveyor pressing belts (21) respectively abut against the upper surfaces of the fabrics on both sides of the zipper belt (5).

3. The zipper tape pre-expansion device according to claim 2, characterized in that: The feeding device (2) is further provided with a synchronous wheel (211), and the conveying pressing belt (21) is driven by the synchronous wheel (211). A first lifting mechanism is provided on the synchronous wheel (211) to drive the synchronous wheel (211) to rise and fall, thereby controlling the rising and falling of the conveying pressing belt (21).

4. The zipper tape pre-expansion device according to claim 1, characterized in that: A first cylinder (24) is connected to the pressing plate (22) to control its lifting and lowering; a second cylinder (25) is connected to the pressing plate (22) to control its forward and backward movement along the conveying direction of the zipper tape (5).

5. The zipper tape pre-expansion device according to claim 4, characterized in that: A positioning plate (23) for the zipper tape (5) is arranged on the upper surface of the workbench (1), and the positioning plate (23) is located below the pressing plate (22).

6. The zipper tape pre-expansion device according to claim 1, characterized in that: Two front upper pressing wheels (311) are arranged in parallel, and respectively abut against the upper surfaces of the fabrics on both sides of the zipper tape (5); two front lower pressing wheels (312) are arranged in parallel, and respectively abut against the lower surfaces of the fabrics on both sides of the zipper tape (5); Two rear upper pressing wheels (321) are arranged in parallel, respectively abutting against the upper surfaces of the fabric on both sides of the zipper tape (5); and two rear lower pressing wheels (322) are arranged in parallel, respectively abutting against the lower surfaces of the fabric on both sides of the zipper tape (5).

7. The zipper tape pre-expansion device according to claim 6, characterized in that: A second lifting mechanism (33) is provided to drive the front upper pressing wheel (311) and the rear upper pressing wheel (321) to rise and fall relative to the front lower pressing wheel (312) and the rear lower pressing wheel (322) at the same time.

8. The zipper tape pre-expansion device according to claim 1, characterized in that: The unloading device (4) is arranged below the workbench (1), and comprises a discharge cylinder (41) arranged on one side of the workbench (1) and connected to the pre-expansion device (3), a material clamping mechanism (43), a material receiving platform (44), and a packaging mechanism (42) arranged on the other side of the workbench (1); the discharge cylinder (41) is provided with a discharge port (411) below the workbench; the material clamping mechanism (43) and the material receiving platform (44) are arranged between the discharge port (411) and the packaging mechanism (42); The material clamping mechanism (43) is located below the workbench (1) and is slidably disposed between the material outlet (411) and the packaging mechanism (42); a material receiving platform (44) is disposed below the material clamping mechanism (43) and is slidably disposed to approach or leave the packaging mechanism (42); A material pushing plate (45) is also provided on the material receiving platform (44) for pushing the zipper tape (5) packaged by the packaging mechanism (42) away from the material receiving platform (44).

9. The zipper tape pre-expansion device according to claim 8, characterized in that: The clamping mechanism (43) comprises a rotating cylinder (431), a finger cylinder (432) and a clamping arm (433); the finger cylinder (432) is arranged on the rotating cylinder (431); the finger cylinder (432) drives the clamping arm (433) to open / close; and the rotating cylinder (431) controls the rotation of the clamping arm (433); A first slide rail (46) is arranged below the workbench (1), and a slider (49) is arranged; one side of the slider (49) is connected to the clamping mechanism (43), and the other side is connected to the first slide rail (46); the slider (49) is connected to the rotating cylinder (431) of the clamping mechanism (43).

10. The zipper tape pre-expansion device according to claim 8, characterized in that: A second slide rail (47) is arranged below the material receiving platform (44), and the material receiving platform (44) is arranged on the second slide rail (47); A third lifting mechanism (48) is provided and connected to the material receiving platform (44), and when the material receiving platform (44) slides toward / away from the packaging mechanism (42), the material receiving platform (44) is driven to rise / fall.

Images