A stretching device for artificial leather production

Abstract

This utility model discloses a stretching device for artificial leather production, relating to the field of artificial leather production technology. This utility model features a reliable stretching unit, with clamping and fixing components on both sides effectively clamping and fixing the artificial leather. The rounded corners of the clamps prevent damage to the artificial leather during clamping. It also features a reliable winding unit, with a winding rod used to secure the ends of the artificial leather. A motor drives the insert cylinder and winding rod to rotate via a gear set, thereby performing the winding function. A length measuring wheel is used to calculate the distance the artificial leather moves to the right by the number of rotations. When the calculated distance reaches the set stretching length of the leather, the control center stops the motor and pauses the winding action of the winding rod. Then, the subsequent incoming leather segments are stretched, and this process of stretching and winding is repeated to achieve continuous processing.

Description

Technical Field

[0001] This utility model relates to the field of artificial leather production technology, specifically a stretching device for artificial leather production. Background Technology

[0002] Artificial leather, as an important material, is widely used in footwear, clothing, gloves, general merchandise, interior decorations, and automotive interiors. Stretching is a crucial step in the production of artificial leather. Stretching improves the material properties of the leather, allows it to be made to meet different usage requirements in terms of length, reduces material waste, and facilitates subsequent processing.

[0003] Existing stretching devices used in artificial leather production typically have planar clamping components, resulting in poor clamping performance and affecting the stability of the stretching process. Furthermore, the surfaces and edges of these clamps are often right-angled, which can easily damage the surface of the artificial leather during clamping. In addition, existing artificial leather is often stored in rolls, and after completing one stretching section, the existing stretching devices cannot easily and effectively remove the leather from the processing section and feed it into the next processing section, making continuous processing impossible and resulting in low processing efficiency. Therefore, we propose a stretching device for artificial leather production. Utility Model Content

[0004] The technical problem this invention aims to solve is to overcome existing defects and provide a stretching device for artificial leather production. This device features a reliable stretching unit, with clamping and fixing components on both sides effectively clamping and fixing the artificial leather. The rounded edges of the clamps prevent damage to the artificial leather during clamping. The clamp position at the right mounting base is fixed, and a ball screw drives a moving block to move laterally. When the moving block moves the left clamp to the left, the artificial leather is stretched. It also features a reliable winding unit, with a winding rod securing the end of the artificial leather. A motor drives the insert cylinder and winding rod to rotate via a gear set, thus performing the winding function. A length measuring wheel calculates the distance the artificial leather moves to the right based on the number of rotations. When the calculated distance reaches the set stretching length, the control center stops the motor and pauses the winding action of the winding rod. The device then stretches subsequent segments of leather, repeating the stretching and winding operations in a cyclical manner to achieve continuous processing and effectively solve the problems in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a stretching device for artificial leather production, comprising a vertical frame, a stretching unit, and a winding unit;

[0006] Vertical frame: The lower end is fixedly connected to a base plate;

[0007] The tensioning unit includes a moving block, a slot, a ball screw, a mounting bracket, a second U-shaped bracket, a second hydraulic cylinder, and a clamping plate. A square mounting slot is located at the middle left side of the vertical plate frame. Slots are formed on both the upper and lower sides of the slot. The moving block is slidably connected inside the square mounting slot, and locking strips are fixedly connected to its upper and lower sides. The locking strips are engaged and slidably connected inside the slots. A horizontal ball screw is fixedly installed at the middle height inside the square mounting slot. The nut of the ball screw is fixedly connected inside the moving block. A U-shaped mounting bracket is fixedly connected to the front end of the moving block. The opening of the mounting bracket faces rearward, and rectangular through slots are formed on both its upper and lower sides. A second U-shaped bracket is fixedly connected to both the upper and lower ends of the mounting bracket. A second hydraulic cylinder is fixedly installed inside the second U-shaped bracket. The telescopic ends of both second hydraulic cylinders are close to the mounting bracket, and a clamping plate is fixedly connected to the end of each telescopic rod. The opposite sides of the two clamping plates have a corrugated structure that can fit together.

[0008] Rewind unit: Installed on the right side of the vertical frame.

[0009] The ball screw drives the moving block to move laterally. The retaining strip at the bottom of the moving block limits its movement, allowing it to slide stably within the square mounting slot. The moving block drives the mounting frame to move. The artificial leather to be processed passes laterally to the right from inside the mounting frame, then through the upper and lower mounting seats, and its end is fixed inside the take-up bar. The locking components at the upper and lower mounting seats fix the artificial leather from the right side. The upper and lower hydraulic cylinders at the left mounting frame push two clamping plates to hold the left side of the artificial leather. Driven by the ball screw, the left end of the artificial leather is stretched to the left. The wave structure on the opposite surface of the two clamping plates effectively improves the tightness of the grip on the artificial leather, thereby ensuring the stability of the stretching operation and preventing damage to the surface of the artificial leather.

[0010] Furthermore, the stretching unit also includes a mounting base, a groove, a locking block, a U-shaped frame, a hydraulic cylinder, and a connecting block. Two cuboid mounting bases are fixedly connected at the middle right position of the front end of the vertical plate frame. The upper mounting base has a vertical through groove inside, and the upper end of the lower mounting base has a semi-circular groove. The upper end of the upper mounting base is fixedly connected to the U-shaped frame. The hydraulic cylinder is installed and fixed on the top side inside the U-shaped frame. The telescopic end of the hydraulic cylinder faces downward, and a trapezoidal connecting block is fixedly connected to its end. The lower end of the connecting block is fixedly connected to a strip-shaped locking block, and the vertical cross-section of the locking block is a semi-circular structure. The lower mounting base is used for creating the groove, and the upper mounting base is used for mounting the U-shaped frame. The U-shaped frame is used for mounting the hydraulic cylinder. The hydraulic cylinder pushes the artificial leather into the groove through the locking block, thereby securing the right side of the artificial leather. The circular structure of the locking block and the groove can secure the artificial leather tightly while avoiding damage to it. The connecting block is used for the installation and connection between the telescopic end of the hydraulic cylinder and the locking block, and its trapezoidal structure can improve the uniformity of the thrust of the hydraulic cylinder.

[0011] Furthermore, the winding unit includes an insert cylinder, a winding bar, and a combination slot. The insert cylinder is rotatably connected to the middle of the right side of the vertical frame. The winding bar is threadedly connected to the inside of the insert cylinder, with its outer end extending forward. A combination slot is formed inside the extended end, consisting of an upper vertical section and a lower circular section. The insert cylinder is used for installing the winding bar. The threaded connection facilitates the disassembly of the rolled material roller and the installation of a new winding bar. After the end of the artificial leather is inserted into the combination slot, a pin can be inserted into the circular section of the combination slot to secure the end of the artificial leather, thus facilitating the winding bar's winding of the stretched artificial leather.

[0012] Furthermore, the winding unit also includes a mounting bracket, a motor, and a gear set. An L-shaped mounting bracket is fixedly connected to the rear right side of the vertical frame. The motor is mounted and fixed at the upper end of the mounting bracket, and the motor is connected to the insert cylinder via the gear set. The mounting bracket is used to mount the motor, which drives the insert cylinder and the winding rod to rotate via the gear set, thereby performing the winding function.

[0013] Furthermore, the winding unit also includes length measuring wheels, a second display screen, and a control center. Two length measuring wheels are mounted on the upper end of the mounting base located on the lower side, and a second display screen is mounted on the front end of this mounting base. A microprocessor is mounted inside the second display screen. Both the length measuring wheels and the second display screen are bidirectionally electrically connected to the microprocessor. The control center is embedded in the middle of the rear side of the vertical frame. When the artificial leather is conveyed to the right, the friction force drives the length measuring wheels to rotate. The microprocessor calculates the distance the artificial leather moves to the right based on the number of rotations of the length measuring wheels. When the calculated distance reaches the set stretching length of the leather, the control center controls the motor to stop working, pausing the winding action of the winding rod. Subsequently, the subsequent incoming leather segments are stretched, and this stretching and winding operation is repeated cyclically to achieve continuous processing of the device. The second display screen is used to display the length of the artificial leather being conveyed, allowing workers to easily check the conveying status of the artificial leather.

[0014] Furthermore, the stretching unit also includes a fixing frame, a tensile testing instrument, and a display screen. A U-shaped fixing frame is fixedly connected to the right end of the square mounting slot on the left side of the vertical plate frame. Two sets of tensile testing instruments are installed on the left side of the fixing frame, and the pull rope of the tensile testing instrument is fixed to the right side of the mounting frame. The display screen is installed at the front end of the fixing frame, and the tensile testing instrument and the display screen are electrically connected in both directions. The fixing frame is used to install the tensile testing instrument, which can monitor the tensile force received by the artificial leather when the mounting frame stretches the artificial leather to the left. The display screen is used to display the monitoring data of the tensile testing instrument, thereby facilitating workers to check the stretching state of the artificial leather.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: The stretching device for artificial leather production of this utility model has the following advantages:

[0016] 1. It has a reliable stretching unit. The clamping and fixing components on the left and right sides can effectively clamp and fix the artificial leather. The rounded corner design of the clamping edge can avoid damage to the artificial leather during clamping. The clamping position at the right mounting seat is fixed. The ball screw is used to drive the moving block to move laterally. When the moving block drives the left clamping to move to the left, the stretching process of the artificial leather can be realized.

[0017] 2. It has a reliable winding unit. The winding rod is used to secure the end of the artificial leather. The motor drives the insertion cylinder and the winding rod to rotate through the gear set, thereby performing the winding function. With the setting of the length measuring wheel, the distance the artificial leather moves to the right can be calculated by the number of rotations. When the calculated movement distance reaches the set leather stretching length, the control center controls the motor to stop working and pauses the winding action of the winding rod. Then, the subsequent leather segments are stretched. This cycle of stretching and winding operations is repeated to realize the continuous processing of the device.

[0018] 3. This utility model features a reliable stretching unit. The clamping and fixing components on both sides can effectively clamp and fix the artificial leather. The rounded corner design of the clamp edges can prevent damage to the artificial leather during clamping. The clamp position at the right mounting base is fixed, and the ball screw is used to drive the moving block to move laterally. When the moving block drives the left clamp to move to the left, the artificial leather can be stretched. It also features a reliable winding unit. The winding rod is used to lock the end of the artificial leather. The motor drives the insert cylinder and the winding rod to rotate through the gear set, thereby performing the winding function. The length measuring wheel can calculate the distance the artificial leather moves to the right by the number of rotations. When the calculated moving distance reaches the set leather stretching length, the control center controls the motor to stop working and pauses the winding action of the winding rod. Then, the subsequent leather segments are stretched. This cycle of stretching and winding operations is repeated to achieve continuous processing of the device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the right front side structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the left rear side structure of this utility model;

[0022] Figure 4 This utility model Figure 1 Enlarged view of the structure at point A in the middle;

[0023] Figure 5 This utility model Figure 1 Enlarged view of the structure at point B in the middle.

[0024] In the diagram: 1 Vertical plate frame, 2 Base plate, 3 Tensioning unit, 31 Mounting seat, 32 Groove, 33 Clamping block, 34 U-shaped frame one, 35 Hydraulic cylinder one, 36 Connecting block, 37 Moving block, 38 Slot, 39 Ball screw, 310 Mounting bracket, 311 U-shaped frame two, 312 Hydraulic cylinder two, 313 Clamping plate, 314 Fixing frame, 315 Tensile testing instrument, 316 Display screen one, 4 Rewinding unit, 41 Insert cylinder, 42 Rewinding bar, 43 Mounting bracket, 44 Motor, 45 Gear set, 46 Combination slot, 47 Length measuring wheel, 48 Display screen two, 49 Control center. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-5 This embodiment provides a technical solution: a stretching device for artificial leather production, including a vertical frame 1, a stretching unit 3 and a winding unit 4;

[0027] The lower end of the vertical frame 1 is fixedly connected to the base plate 2;

[0028] Tensioning unit 3 includes a moving block 37, a slot 38, a ball screw 39, a mounting bracket 310, a second U-shaped bracket 311, a second hydraulic cylinder 312, and a clamping plate 313. A square mounting groove is provided at the middle left side of the vertical plate frame 1. Slots 38 are provided on both the upper and lower sides of the groove. The moving block 37 is slidably connected inside the square mounting groove, and locking strips are fixedly connected to its upper and lower sides. The locking strips are engaged and slidably connected inside the slots 38. A transverse ball screw 39 is installed and fixed at the middle height inside the square mounting groove. The nut component of the ball screw 39... A U-shaped mounting bracket 310 is fixedly connected to the front end of the movable block 37. The opening of the mounting bracket 310 faces backward, and rectangular through slots are provided on both its upper and lower sides. A U-shaped bracket 311 is fixedly connected to both the upper and lower ends of the mounting bracket 310. A hydraulic cylinder 312 is installed and fixed inside the U-shaped bracket 311. The telescopic ends of the two hydraulic cylinders 312 are close to the mounting bracket 310, and a clamping plate 313 is fixedly connected to the end of the telescopic rod. The opposite side of the upper and lower clamping plates has a wave-like structure that can fit together.

[0029] Rewind unit 4: Installed on the right side of the vertical plate frame 1.

[0030] The ball screw 39 is used to drive the moving block 37 to move laterally. The retaining strip at the bottom of the moving block 37 can limit its movement, allowing the moving block 37 to slide stably inside the square mounting groove. The moving block 37 is used to drive the mounting frame 310 to move. The artificial leather to be processed passes laterally to the right from the inside of the mounting frame 310, then passes through the upper and lower mounting seats 31, and its end is fixed inside the winding bar 42. The retaining components at the upper and lower mounting seats 31 fix the artificial leather from the right side. The upper and lower hydraulic cylinders 312 at the left mounting frame 310 push the two clamping plates 313 to hold the left side of the artificial leather. Driven by the ball screw 39, the left end of the artificial leather is stretched to the left. The wave structure on the opposite surface of the two clamping plates 313 can effectively improve the tightness of the grip on the artificial leather, thereby ensuring the stability of the stretching operation and preventing damage to the surface of the artificial leather.

[0031] The tensioning unit 3 also includes a mounting base 31, a groove 32, a locking block 33, a U-shaped frame 34, a hydraulic cylinder 35, and a connecting block 36. Two cuboid mounting bases 31 are fixedly connected at the middle right position of the front end of the vertical plate frame 1. The upper mounting base 31 has a vertical through groove inside, and the lower mounting base 31 has a semi-circular groove 32 at the upper end. The upper end of the upper mounting base 31 is fixedly connected to the U-shaped frame 34. The hydraulic cylinder 35 is installed and fixed on the top side inside the U-shaped frame 34. The telescopic end of the hydraulic cylinder 35 faces downward, and a trapezoidal connecting block 36 is fixedly connected to the end. The lower end of the connecting block 36 is fixedly connected to a strip-shaped locking block 33. The vertical cross-section of the locking block 33 is a semi-circular structure. The lower mounting base 31 is used for opening the groove 32, and the upper mounting base 31 is used for mounting the U-shaped frame 34. The U-shaped frame 34 is used for mounting the hydraulic cylinder 35. The hydraulic cylinder 35 pushes the artificial leather into the groove 32 through the locking block 33, thereby achieving the locking of the right side of the artificial leather. The circular structure of the locking block 33 and the groove 32 can tightly lock the artificial leather without damaging it. The connecting block 36 is used for the installation and connection between the telescopic end of the hydraulic cylinder 35 and the locking block 33, and its trapezoidal structure can improve the uniformity of the thrust of the hydraulic cylinder.

[0032] The winding unit 4 includes an insert cylinder 41, a winding bar 42, and a combination slot 46. The insert cylinder 41 is rotatably connected to the middle of the right side of the vertical frame 1. The winding bar 42 is threadedly connected to the inside of the insert cylinder 41. The outer end of the winding bar 42 extends forward, and the combination slot 46 is formed inside the extended end. The combination slot 46 consists of an upper vertical section and a lower circular section. The insert cylinder 41 is used to install the winding bar 42. The threaded connection facilitates the disassembly of the material roller after winding and the installation of a new winding bar 42. After the end of the artificial leather is inserted into the combination slot 46, a pin can be inserted into the circular section of the combination slot 46 to secure the end of the artificial leather, thereby facilitating the winding bar 42 to wind up the stretched artificial leather.

[0033] The winding unit 4 also includes a mounting bracket 43, a motor 44, and a gear set 45. An L-shaped mounting bracket 43 is fixedly connected to the rear right side of the vertical frame 1. The motor 44 is fixedly mounted on the upper end of the mounting bracket 43. The motor 44 is connected to the insert cylinder 41 through the gear set 45. The mounting bracket 43 is used to mount the motor 44. The motor 44 drives the insert cylinder 41 and the winding rod 42 to rotate through the gear set, thereby performing the winding function.

[0034] The winding unit 4 also includes a length measuring wheel 47, a second display screen 48, and a control center 49. Two length measuring wheels 47 are mounted on the upper end of the mounting base 31 on the lower side, and a second display screen 48 is mounted on the front end of this mounting base 31. A microprocessor is installed inside the second display screen 48. Both the length measuring wheels 47 and the second display screen 48 are bidirectionally electrically connected to the microprocessor. The control center 49 is embedded in the middle of the rear side of the vertical frame 1. When the artificial leather is conveyed to the right, the friction force drives the length measuring wheel 47 to rotate. The microprocessor calculates the distance the artificial leather moves to the right based on the number of rotations of the length measuring wheel 47. When the calculated distance reaches the set stretching length of the leather, the control center 49 controls the motor 44 to stop working, pausing the winding action of the winding rod 42. Then, it stretches the subsequent incoming leather sections, repeating the stretching and winding operations to achieve continuous processing of the device. The second display screen 48 displays the length of the artificial leather being conveyed, allowing workers to easily check the conveying status of the artificial leather.

[0035] The stretching unit 3 also includes a fixing frame 314, a tensile testing instrument 315, and a display screen 316. A U-shaped fixing frame 314 is fixedly connected to the right end of the square mounting slot on the left side of the vertical frame 1. Two sets of tensile testing instruments 315 are installed on the left side of the fixing frame 314. The pull rope of the tensile testing instrument 315 is fixed to the right side of the mounting frame 310. The display screen 316 is installed at the front end of the fixing frame 314, and the tensile testing instrument 315 and the display screen 316 are electrically connected in both directions. The fixing frame 314 is used for mounting the tensile testing instrument 315. The tensile testing instrument 315 can monitor the tensile force received by the artificial leather when the mounting frame 310 stretches the artificial leather to the left. The display screen 316 is used to display the monitoring data of the tensile testing instrument 315, so that workers can easily check the stretching status of the artificial leather.

[0036] The working principle of the stretching device for artificial leather production provided by this utility model is as follows: When using this device, the artificial leather to be processed is first passed horizontally to the right through the inside of the mounting frame 310, and then through the upper and lower mounting seats 31. Its end part is fixed inside the winding bar 42. After the end of the artificial leather is inserted into the combination slot 46, a pin can be inserted into the circular section of the combination slot 46 to lock the end of the artificial leather, so that the winding bar 42 can easily wind up the stretched artificial leather. During the stretching process, hydraulic cylinder 35 pushes the artificial leather into the groove 32 via the clamping block 33, thereby securing the right side of the artificial leather. Two hydraulic cylinders 312 on the left mounting bracket 310 push two clamping plates 313 to hold the left side of the artificial leather, and under the action of the ball screw 39, stretch the artificial leather to the left. Based on stable clamping, the rounded corners of the clamping edges prevent damage to the artificial leather during clamping. The wave structure on the opposing surfaces of the two clamping plates 313 effectively improves the tightness of the grip on the artificial leather, ensuring stable stretching operations and preventing damage to the surface of the artificial leather. The circular structure of the clamping block 33 and the groove 32, while providing tight clamping, also prevents damage to the artificial leather. It also features a reliable winding unit 4, with a mounting bracket 43 for mounting the motor 44. The motor 44 drives the insert cylinder 41 and the winding bar 42 to rotate via a gear set, thereby performing the winding function. The insert cylinder 41 is used for mounting the winding bar 42, and the threaded connection facilitates the disassembly of the material roller after winding and the installation of a new winding bar 42. When the artificial leather is conveyed to the right, it will drive the length measuring wheel 47 to rotate through friction. The microprocessor calculates the distance the artificial leather moves to the right by the number of rotations of the length measuring wheel 47. When the calculated distance reaches the set leather stretching length, the control center 49 controls the motor 44 to stop working and pauses the winding action of the winding bar 42. Then, it stretches the subsequent leather sections, and repeats the stretching and winding operations to achieve continuous processing of the device. In addition, display screen 2 48 is used to display the length of the artificial leather conveyor, so that workers can check the conveying status of the artificial leather. Fixing frame 314 is used for the installation of tensile testing instrument 315. Tensile testing instrument 315 can monitor the tensile force received by the artificial leather when the mounting frame 310 stretches the artificial leather to the left. Display screen 1 316 is used to display the monitoring data of tensile testing instrument 315, so that workers can check the stretching status of the artificial leather.

[0037] It is worth noting that the input terminals of the ball screw 39, hydraulic cylinder 35, hydraulic cylinder 312 and motor 44 disclosed in the above embodiments are all electrically connected to the output terminal of the external power supply through the control center 49. The control center 49 controls the operation of the above electrical devices using methods commonly used in the prior art.

[0038] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A stretching device for artificial leather production, characterized by: It includes a vertical frame (1), a stretching unit (3), and a winding unit (4); The lower end of the vertical frame (1) is fixedly connected to the base plate (2); The tensioning unit (3) includes a moving block (37), a slot (38), a ball screw (39), a mounting bracket (310), a second U-shaped frame (311), a second hydraulic cylinder (312), and a clamping plate (313). A square mounting slot is provided at the middle position on the left side of the vertical plate frame (1). Slots (38) are provided on both the upper and lower sides of the slot. The moving block (37) is slidably connected to the inside of the square mounting slot, and a retaining strip is fixedly connected to its upper and lower sides. The retaining strip is engaged and slidably connected to the inside of the slot (38). A horizontal ball screw (39) is installed and fixed at the middle height of the inside of the square mounting slot. The nut component is fixedly connected inside the movable block (37). The front end of the movable block (37) is fixedly connected to a U-shaped mounting bracket (310). The opening of the mounting bracket (310) faces backward, and rectangular through slots are provided on both its upper and lower sides. A U-shaped bracket (311) is fixedly connected to both the upper and lower ends of the mounting bracket (310). A hydraulic cylinder (312) is installed and fixed inside the U-shaped bracket (311). The telescopic ends of the two hydraulic cylinders (312) are close to the mounting bracket (310), and a clamp (313) is fixedly connected to the end of the telescopic rod. The opposite side of the upper and lower clamps is a wave-like structure that can fit together. Rewind unit (4): Installed on the right side of the vertical plate frame (1).

2. The stretching device for artificial leather production according to claim 1, characterized in that: The stretching unit (3) also includes a mounting base (31), a groove (32), a locking block (33), a U-shaped frame (34), a hydraulic cylinder (35), and a connecting block (36). The upper and lower rectangular mounting bases (31) are fixedly connected at the middle right position of the front end of the vertical plate frame (1). The upper mounting base (31) has a vertical through groove inside, and the lower mounting base (31) has a semi-circular groove (32) at the upper end. The upper end of the upper mounting base (31) is fixedly connected to the U-shaped frame (34). The hydraulic cylinder (35) is installed and fixed on the top side inside the U-shaped frame (34). The telescopic end of the hydraulic cylinder (35) faces downward, and a trapezoidal connecting block (36) is fixedly connected at the end. The lower end of the connecting block (36) is fixedly connected to a strip-shaped locking block (33). The vertical section of the locking block (33) is a semi-circular structure.

3. The stretching device for artificial leather production according to claim 1, characterized in that: The winding unit (4) includes a insert cylinder (41), a winding bar (42), and a combination slot (46). The insert cylinder (41) is rotatably connected at the middle height of the right side of the vertical plate frame (1). The winding bar (42) is threadedly connected inside the insert cylinder (41). The outer end of the winding bar (42) extends forward, and a combination slot (46) is provided inside the extended end. The combination slot (46) consists of an upper vertical section and a lower circular section.

4. The stretching device for artificial leather production according to claim 1, characterized in that: The winding unit (4) also includes a mounting bracket (43), a motor (44) and a gear set (45). An L-shaped mounting bracket (43) is fixedly connected to the right rear end of the vertical plate frame (1). A motor (44) is fixedly installed on the upper end of the mounting bracket (43). The motor (44) is connected to the insert cylinder (41) through the gear set (45).

5. The stretching device for artificial leather production according to claim 2, characterized in that: The winding unit (4) also includes a length measuring wheel (47), a second display screen (48) and a control center (49). The upper end of the mounting base (31) on the lower side is equipped with two length measuring wheels (47) on the left and right sides, and the second display screen (48) is installed at the front end of the mounting base (31). A microprocessor is installed inside the second display screen (48). The length measuring wheel (47) and the second display screen (48) are both bidirectionally electrically connected to the microprocessor. The control center (49) is embedded in the middle of the rear side of the vertical plate frame (1).

6. The stretching device for artificial leather production according to claim 1, characterized in that: The tension unit (3) also includes a fixed frame (314), a tension tester (315), and a display screen (316). A U-shaped fixed frame (314) is fixedly connected to the right end of the square mounting slot on the left side of the vertical plate frame (1). Two sets of tension testers (315) are installed on the left side of the fixed frame (314). The pull rope of the tension tester (315) is fixed to the right side of the mounting frame (310). A display screen (316) is installed at the front end of the fixed frame (314). The tension tester (315) and the display screen (316) are bidirectionally electrically connected.

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