Leather plasma surface treatment machine

Abstract

The application relates to a leather plasma surface treatment machine, and belongs to the field of leather surface treatment equipment. The machine comprises a conveying belt device, a plasma surface treatment device, a feeding device and a discharging device. The conveying belt device is used for conveying leather pieces. The feeding device and the discharging device are arranged at the two ends of the conveying belt device respectively. The feeding device is used for grabbing and placing stacked leather pieces on the conveying belt device. The plasma spray gun of the plasma surface treatment device is located above the conveying belt device and faces the conveying belt device, and is used for cleaning the leather pieces moving on the conveying belt device and located below the plasma spray gun. The discharging device is used for grabbing and stacking the treated leather pieces on the conveying belt device. The application has the effects of improving the efficiency and quality of leather piece surface cleaning.

Description

Technical Field

[0001] This application relates to the field of leather surface treatment equipment, and in particular to a leather plasma surface treatment machine. Background Technology

[0002] One step in the production of spheres (soccer balls, basketballs) is to glue leather pieces onto the surface of the sphere to form a complete sphere. In order to make the leather pieces adhere more firmly to the surface of the sphere, the surface of the leather pieces needs to be cleaned before gluing. However, the current method of cleaning the surface of leather pieces is usually done manually, which needs to be improved. Utility Model Content

[0003] To improve the efficiency and quality of leather surface cleaning, this application provides a leather plasma surface treatment machine.

[0004] The present application provides a leather plasma surface treatment machine with the following technical solution: A leather plasma surface treatment machine includes a conveyor belt device, a plasma surface processor, a feeding device, and a discharging device. The conveyor belt device is used to transport leather pieces. The feeding device and the discharging device are respectively disposed at both ends of the conveyor belt device. The feeding device is used to grab stacked leather pieces and place them on the conveyor belt device. The plasma spray gun of the plasma surface processor is located above the conveyor belt device and faces the conveyor belt device, and is used to clean the leather pieces that move on the conveyor belt device to below the plasma spray gun. The discharging device is used to grab the treated leather pieces from the conveyor belt device and stack them for storage.

[0005] By adopting the above technical solution, the feeding device picks up stacked leather pieces at intervals and places them on the conveyor belt. The conveyor belt then transports the leather pieces sequentially to the area below the plasma spray gun. The plasma sprayed from the plasma spray gun cleans the surface of the leather pieces. After cleaning, the leather pieces are transported to the area near the unloading device, where the unloading device picks up and stacks the leather pieces sequentially, thereby improving the efficiency and quality of leather cleaning.

[0006] Preferably, the conveyor belt device further includes a negative pressure mechanism, which includes a negative pressure plate and an exhaust fan. The negative pressure plate is installed between the upper and lower conveyor belts of the conveyor belt device. The negative pressure plate is hollow inside. Multiple negative pressure holes are spaced apart on the surface of the negative pressure plate along its length. The exhaust port of the exhaust fan is connected to the inside of the negative pressure plate through a pipe. Multiple adsorption holes corresponding to the multiple negative pressure holes are spaced apart along the length of the conveyor belt.

[0007] By adopting the above technical solution, during the conveyor belt process, the leather pieces are drawn in by the fan through the negative pressure holes on the negative pressure plate, thereby causing the suction holes of the conveyor belt to adsorb the leather pieces, reducing the occurrence of leather piece slippage and deviation, and thus improving the accuracy and stability of leather piece cleaning.

[0008] Preferably, a mounting frame is provided above the conveyor belt device, and an adjustment mechanism for adjusting the height of the plasma spray gun is provided on the mounting frame; the adjustment mechanism includes a mounting base, a lead screw, a guide rod, and a sliding seat. The mounting base is vertically fixedly mounted on the mounting frame, the lead screw is vertically rotatably connected to the mounting base, the guide rod is vertically fixedly mounted on the mounting base and parallel to the lead screw, and the sliding seat is threadedly connected to the lead screw and movably passes through the guide rod. The plasma spray gun is vertically mounted on the sliding seat.

[0009] By adopting the above technical solution, the vertical position of the sliding seat can be adjusted by rotating the lead screw, thereby adjusting the distance between the plasma spray gun and the leather sheet on the conveyor belt, thus adapting to the cleaning of leather sheets of different thicknesses.

[0010] Preferably, both the feeding device and the unloading device include a stacking lifting mechanism and a gripping mechanism. The gripping mechanism is used to cooperate with the stacking lifting mechanism to grip the leather pieces on the stacking lifting mechanism and place them on the conveyor belt device, or to grip the leather pieces on the conveyor belt device and place them on the stacking lifting mechanism.

[0011] By adopting the above technical solution, the leather pieces to be cleaned are stacked and placed at the stacking lifting mechanism. The gripping mechanism grabs the leather pieces at intervals and places them on the conveyor belt device. Then, they are sequentially conveyed to the plasma spray gun for cleaning. After that, they are conveyed to the unloading device. The gripping mechanism grabs and stacks the cleaned leather pieces at the stacking lifting mechanism, thereby improving the efficiency of leather cleaning and sorting.

[0012] Preferably, the stacking lifting mechanism includes a base and a support lifting assembly mounted on the base. The support lifting assembly includes a support plate, a vertical rod, and a driving component. The vertical rod is vertically fixed on the base, the support plate is horizontally located above the base, the support plate is movably inserted through the vertical rod, and the driving component drives the support plate to move up and down.

[0013] By adopting the above technical solution, the leather pieces at the feeding device are stacked on the support plate, and the support plate is driven to rise intermittently by the driving component, so as to cooperate with the gripping mechanism to grip the leather pieces on the support plate and place them on the conveyor belt device; while the gripping mechanism at the unloading device grips the leather pieces on the conveyor belt device and places them on the support plate, and the support plate falls intermittently to cooperate with the stacking of leather pieces.

[0014] Preferably, multiple vertical rods are provided, and the multiple vertical rods are distributed on both sides of the support plate to form a space for placing the leather piece.

[0015] By adopting the above technical solution, the vertical rods serve as guides during the lifting and lowering of the support plate, and the distribution of multiple vertical rods forms an enclosed space for placing the leather pieces. At the same time, the vertical rods also serve as limiters.

[0016] Preferably, it also includes a pushing mechanism. Two supporting and lifting components are provided, and the two supporting and lifting components are spaced apart above the base. The pushing mechanism is used to push and switch one of the supporting and lifting components to the loading or unloading station below the gripping mechanism.

[0017] By adopting the above technical solution, after the gripping mechanism has finished gripping the leather pieces stacked on one of the support plates at the feeding device, the pushing mechanism pushes the leather pieces stacked on the other support plate to the feeding station, so that the gripping mechanism can continuously grip the leather pieces, thereby improving the leather piece processing efficiency. This eliminates the need to stop the machine to add leather pieces to the support plate, thus improving the leather piece processing efficiency. Similarly, the unloading device also has dual-station stacking for unloading, thereby improving the overall leather piece cleaning efficiency.

[0018] Preferably, the pushing mechanism includes a support frame and a pushing cylinder, the pushing cylinder is mounted on the support frame, the base is slidably mounted on the support frame, and the telescopic shaft of the pushing cylinder is fixedly connected to the base.

[0019] By adopting the above technical solution, the base can be moved along the support frame by pushing the cylinder, so that one of the two support plates installed on the base is in the loading or unloading position, and the other is in the unloading or discharge position.

[0020] Preferably, the gripping mechanism includes a fixed frame, a horizontal moving component, a vertical moving component, and a suction cup component. The horizontal moving component includes a horizontal slide and a drive source. The horizontal slide is slidably connected to the fixed frame, and the drive source drives the horizontal slide to move horizontally. The vertical moving component includes a mounting block and a vertical cylinder. The vertical cylinder is mounted on the horizontal slide, and the mounting block is vertically slidably connected to the side wall of the slider. The telescopic shaft of the vertical cylinder is fixedly connected to the mounting block, and the suction cup component is mounted on the mounting block.

[0021] By adopting the above technical solution, the drive source drives the horizontal slide to move horizontally, thereby enabling the suction cup assembly to be positioned above the stacking lifting mechanism or above the conveyor belt device. Then, the vertical cylinder drives the suction cup assembly to move up and down, thereby enabling the leather pieces stacked on the support plate to be picked up and placed on the conveyor belt device, or the leather pieces on the conveyor belt device to be picked up and placed on the support plate.

[0022] Preferably, it also includes an electrical control box and a roller metering device. The roller metering device is mounted on a mounting frame, and the roller of the roller metering device contacts the conveyor belt of the conveyor belt device. The electrical control box receives the distance signal of the conveyor belt movement output by the roller metering device. The electrical control box controls the plasma spray gun to operate when the rubber sheet approaches the plasma spray gun according to the signal from the roller metering device.

[0023] By adopting the above technical solution, the roller of the roller meter counter rotates with the conveyor belt on the conveyor belt device, thereby recording the movement of the conveyor belt. Since the interval between the gripping mechanism gripping the leather pieces and placing them on the conveyor belt is fixed, the distance between the two leather pieces placed on the conveyor belt is fixed. The electrical control box can control the plasma surface processor to work based on the distance the conveyor belt moves as detected by the roller meter counter, so that the leather pieces are cleaned only when they are under the plasma spray gun, thereby achieving energy saving.

[0024] In summary, this application includes at least one of the following beneficial technical effects: the gripping mechanism intermittently grips the leather pieces stacked on the support and places them on the conveyor belt device. The conveyor belt device sequentially transports the leather pieces to below the plasma spray gun. The plasma sprayed from the plasma spray gun cleans the surface of the leather pieces. The cleaned leather pieces are then transported to a location near the unloading device. The gripping mechanism at the unloading device sequentially grips and stacks the leather pieces on the support plate, thereby improving the efficiency and quality of leather piece cleaning. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the plasma surface treatment machine in the embodiments of this application.

[0026] Figure 2 This is a schematic diagram of the conveyor belt device and the internal structure of the box in the embodiments of this application.

[0027] Figure 3 This is a schematic diagram of the negative pressure mechanism installed on the conveyor frame in an embodiment of this application.

[0028] Figure 4 This is a schematic diagram of the mounting structure of the plasma spray gun on the mounting bracket in an embodiment of this application.

[0029] Figure 5 This is a schematic diagram of the feeding device and the unloading device in the embodiments of this application.

[0030] Figure 6 This is a schematic diagram of the gripping mechanism in the embodiments of this application.

[0031] Figure 7 This is a structural schematic diagram of the feeding device and the unloading device from another perspective in the embodiments of this application.

[0032] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Electrical control box; 2. Conveyor belt device; 21. Conveyor frame; 22. Conveyor roller; 23. Conveyor belt; 231. Adsorption hole; 24. Conveyor motor; 25. Negative pressure plate; 251. Negative pressure hole; 26. Exhaust fan; 27. Support plate; 3. Plasma surface processor; 31. Plasma generator; 32. Plasma spray gun; 33. Mounting bracket; 34. Mounting base; 35. Lead screw; 36. Guide rod; 37. Sliding seat; 38. 39. Rotary handle; 4. Roller meter counter; 4. Feeding device; 41. Stacking and lifting mechanism; 411. Base; 412. Support plate; 413. Vertical rod; 414. Vertical plate; 415. Drive motor; 416. Support frame; 417. Push cylinder; 42. Gripping mechanism; 421. Fixing frame; 422. Horizontal slide; 423. Gripping motor; 424. Mounting block; 425. Vertical cylinder; 426. Bracket; 427. Suction cup; 5. Unloading device. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0034] This application discloses a plasma surface treatment machine for leather. (Refer to...) Figure 1 and Figure 2 The leather plasma surface treatment machine includes a housing 1, a conveyor belt device 2, a plasma surface processor 3, a loading device 4, and a unloading device 5. The loading device 4 is installed at one end of the conveyor belt device 2, and the unloading device 5 is installed at the other end of the conveyor belt device 2. The loading device 4 is used to stack leather pieces and intermittently grab and place them onto the conveyor belt device 2. The conveyor belt device 2 is used to transport the leather pieces to one end of the unloading device 5, and the unloading device 5 is used to grab and stack the leather pieces. The conveyor belt device 2 is horizontally installed on the upper surface of the housing 1. The plasma surface processor 3 includes a plasma generator 31 and a plasma spray gun 32. The plasma generator 31 is installed inside the housing 1, and the plasma spray gun 32 is installed above the conveyor belt device 2 and faces the surface of the conveyor belt device 2. The plasma spray gun 32 is used to spray plasma to clean the leather pieces that move on the conveyor belt device 2 and approach the plasma spray gun 32. Compared with manual cleaning, this greatly improves the efficiency and quality of leather cleaning.

[0035] Reference Figure 2 and Figure 3 The conveyor belt device 2 includes a conveyor frame 21, conveyor rollers 22, a conveyor belt 23, and a conveyor motor 24. The conveyor frame 21 is installed on the upper surface of the housing 1. Two conveyor rollers 22 are provided and are rotatably connected to both ends of the conveyor frame 21. The conveyor motor 24 is installed on the conveyor frame 21 and its output shaft is connected to one of the conveyor rollers. The conveyor belt 23 is connected between the two conveyor rollers 22.

[0036] To improve the stability of the leather pieces conveyed on the conveyor belt device 2, the conveyor belt device 2 also includes a negative pressure mechanism, which includes a negative pressure plate 25 and an exhaust fan 26. The negative pressure plate 25 is installed on the conveyor frame 21 and located between the upper and lower conveyor belts 23, with the upper surface of the negative pressure plate 25 in close contact with the lower surface of the upper conveyor belt 23. The negative pressure plate 25 is hollow inside, and multiple sets of negative pressure holes 251 are spaced along its length on its surface. The exhaust fan 26 is installed inside the housing 1, and the exhaust port of the exhaust fan 26 is connected to the interior of the negative pressure plate 25 through a pipe. The conveyor belt 23 is spaced along its length with multiple sets of adsorption holes 231 corresponding to the multiple sets of negative pressure holes 251. The length of the negative pressure plate 25 extends beyond the position of the plasma spray gun 32 from the position of the feeding device 4, while a support plate 27 is horizontally fixed from the unloading device 5 to the conveyor frame 21 near the position of the plasma spray gun 32. The upper surface of the support plate 27 is close to the upper surface of the upper conveyor belt. During the conveyor belt process, the leather pieces are drawn in by a fan through the negative pressure holes 251 on the negative pressure plate 25. This causes the suction holes 231 on the conveyor belt 23 to adhere to the leather pieces, reducing the likelihood of the leather pieces shifting due to the plasma sprayed by the plasma gun 32, which would affect the cleaning process. This improves the accuracy and stability of the leather piece cleaning. Simultaneously, the support plate 27 and the upper surface of the negative pressure plate 25 support the conveyor belt, thereby improving the accuracy of the loading and unloading devices 4 and 5 in handling the leather pieces.

[0037] Reference Figure 1 and Figure 4 A mounting frame 33 is installed above the conveyor belt device 2, and an adjustment mechanism for adjusting the height of the plasma spray gun 32 is provided on the mounting frame 33. The adjustment mechanism includes a mounting base 34, a lead screw 35, a guide rod 36, and a sliding seat 37. The mounting base 34 is vertically fixed on the mounting frame 33, the lead screw 35 is vertically rotatably connected to the mounting base 34, the guide rod 36 is vertically fixed on the mounting base 34 and parallel to the lead screw 35, and the sliding seat 37 is threadedly connected to the lead screw 35 and movably passes through the guide rod 36. The plasma spray gun 32 is vertically mounted on the sliding seat 37, and a rotating handle 38 is fixedly provided at the upper end of the lead screw 35. By rotating the rotating handle 38, the vertical position of the sliding seat 37 can be adjusted, thereby adjusting the distance between the plasma spray gun 32 and the leather sheet on the conveyor belt 23, thus adapting to and accommodating leather sheets of different thicknesses and adjusting the cleaning effect of the leather sheets. In this embodiment, two plasma spray guns 32 are provided, and the two plasma spray guns 32 are distributed along the width direction of the conveyor belt 23, thereby increasing the cleaning area of ​​the leather sheet.

[0038] It also includes an electrical control box 11 and a roller meter counter 39. The electrical control box 11 is installed inside the housing 1, and the roller meter counter 39 is installed on the mounting frame 33. The roller of the roller meter counter 39 contacts the conveyor belt 23. The feeding device 4 picks up and places the material on the conveyor belt 2 at a fixed time, so the distance between two adjacent pieces on the conveyor belt 2 is fixed. The electrical control box 11 receives the distance signal of the conveyor belt 23 movement output by the roller meter counter 39, so that the electrical control box 11 controls the plasma spray gun 32 to spray plasma to clean the piece when the piece approaches the plasma spray gun 32. In this embodiment, two roller meter counters are provided, and the two roller meter counters are respectively installed on both sides of the mounting frame 33. The two roller meter counters control the operation of the two plasma spray guns 32 respectively.

[0039] Reference Figure 1 and Figure 5 Both the feeding device 4 and the unloading device 5 include a stacking lifting mechanism 41 and a gripping mechanism 42. The gripping mechanism 42 is used to cooperate with the stacking lifting mechanism 41 to grip the leather pieces on the stacking lifting mechanism 41 and place them on the conveyor belt device 2, or to grip the leather pieces on the conveyor belt device 2 and place them on the stacking lifting mechanism 41.

[0040] Specifically, the stacking lifting mechanism 41 includes a base 411 and a support lifting assembly mounted on the base 411. The support lifting assembly includes a support plate 412, a vertical rod 413, and a driving component. The vertical rod 413 is vertically fixed on the base 411, and the support plate 412 is horizontally located above the base 411, movably passing through the vertical rod 413. A vertical plate 414 is vertically fixed on the side of the base 411 near the conveyor belt device 2. One side of the support plate 412 is vertically slidably connected to the vertical plate 414 via a slide rail and a slider. The driving component is mounted on the base 411 and is used to drive the support plate 412 to move up and down. In this embodiment, the driving component is a drive motor 415, which is mounted on the upper surface of the base 411. The drive motor 415 drives the support to move up and down through the pulley set. One of the pulleys of the pulley set is rotatably mounted on the upper side wall of the vertical plate 414, and the other lower pulley is connected to the output shaft of the drive motor 415. The belt of the pulley set is connected between the two pulleys, and the belt is also fixedly connected to the support plate 412. Thus, the drive motor 415 drives the belt to move up and down, thereby driving the support plate 412 to move up and down.

[0041] Furthermore, multiple vertical rods 413 are provided, distributed on both sides of the support plate 412 to form a space for placing the leather pieces. The vertical rods 413 serve as guides during the lifting and lowering of the support plate 412, and the distribution of multiple vertical rods 413 forms an enclosed space for placing the leather pieces, while also limiting the position of the leather pieces.

[0042] Reference Figure 5 and Figure 6 To achieve dual-station loading and unloading of stacked leather pieces, two supporting lifting components are provided, spaced apart above the base 411. A pushing mechanism is also included to switch the two supporting lifting components between the loading and unloading stations below the gripping mechanism 42. After the gripping mechanism 42 has finished gripping the stacked leather pieces on one of the support plates 412 at the loading device 4, the pushing mechanism pushes the stacked leather pieces on the other support plate 412 to the loading station, allowing the gripping mechanism 42 to continuously grip leather pieces, improving leather processing efficiency without needing to stop and add leather pieces to the support plate 412, thus improving leather processing efficiency. Similarly, the unloading device 5 also has dual-station stacking for unloading, thereby improving the overall efficiency of leather cleaning processing.

[0043] Specifically, the pushing mechanism includes a support frame 416 and a pushing cylinder 417. The base 411 is slidably mounted on the support frame 416 via a slide rail. The telescopic shaft of the pushing cylinder 417 is fixedly connected to the base 411. The cylinder body of the pushing cylinder 417 is fixedly mounted on the support frame 416. The pushing cylinder 417 can push the base 411 to move along the support frame 416, thereby enabling one of the two support plates 412 mounted on the base 411 to be in the loading or unloading position, and the other to be in the unloading or discharge position.

[0044] Reference Figure 5 and Figure 7The gripping mechanism 42 includes a fixed frame 421, a horizontal moving component, a vertical moving component, and a suction cup component. The fixed frame 421 is fixedly mounted on the support frame 416. The horizontal moving component includes a horizontal slide 422 and a drive source. The horizontal slide 422 is horizontally slidably connected to the fixed frame 421 via a guide rail and a slider. The drive source is mounted on the fixed frame 421 and drives the horizontal slide 422 to move horizontally. In this embodiment, the drive source is a gripping motor 423. The gripping motor 423 drives the horizontal slide 422 to move horizontally via a pulley set. One pulley of the pulley set is rotatably mounted on the fixed frame 421, and the other pulley is connected to the output shaft of the gripping motor 423. The belt of the pulley set is connected between the two pulleys, and the belt is also fixedly connected to the horizontal slide 422, thereby driving the horizontal slide 422 to move horizontally via the gripping motor 423. The vertical movement assembly includes a mounting block 424 and a vertical cylinder 425. The vertical cylinder 425 is mounted on a horizontal slide block 422. The mounting block 424 is vertically connected to the side wall of the horizontal slide block 422 via a guide rail and a slider. The telescopic shaft of the vertical cylinder 425 is fixedly connected to the mounting block 424. The suction cup assembly is mounted on the mounting block 424. The suction cup assembly includes a bracket 426 and multiple suction cups 427 mounted on the bracket 426. The bracket 426 is mounted on the mounting block 424. The gripping motor 423 drives the horizontal slide block 422 to move horizontally, thereby enabling the suction cup assembly to be positioned above the stacking lifting mechanism 41 or above the conveyor belt device 2. Then, the vertical cylinder 425 drives the suction cups 427 on the suction cup assembly to move up and down, thereby enabling the gripping of the stacked leather pieces on the support plate 412 and placing them on the conveyor belt device 2, or the gripping of the leather pieces on the conveyor belt device 2 and placing them on the support plate 412.

[0045] The implementation principle of a leather plasma surface treatment machine according to an embodiment of this application is as follows: the leather pieces to be cleaned are stacked on the support plate 412. The gripping motor 423, in conjunction with the vertical cylinder 425, causes the suction cup 427 to adsorb the leather pieces and place them on the conveyor belt device 2. During the process of the gripping mechanism 42 reciprocating to grip the leather pieces, the stacking lifting mechanism 41 drives the support plate 412 to gradually move upward through the drive motor 415, so that the leather pieces are always in the gripping position of the gripping mechanism 42. Then, the leather pieces are sequentially conveyed to the area below the plasma spray gun 32 for cleaning, and then conveyed to the unloading device 5. The gripping mechanism 42 grips and stacks the cleaned leather pieces and places them on the stacking lifting mechanism 41, thereby improving the efficiency of leather cleaning and finishing.

[0046] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A leather plasma surface treatment machine, characterized in that: The device includes a conveyor belt device (2), a plasma surface processor (3), a loading device (4), and a unloading device (5). The conveyor belt device (2) is used to transport leather pieces. The loading device (4) and the unloading device (5) are respectively located at both ends of the conveyor belt device (2). The loading device (4) is used to grab stacked leather pieces and place them on the conveyor belt device (2). The plasma spray gun (32) of the plasma surface processor (3) is located above the conveyor belt device (2) and faces the conveyor belt device (2). It is used to clean the leather pieces that move from the conveyor belt device (2) to below the plasma spray gun (32). The unloading device (5) is used to grab and stack the treated leather pieces from the conveyor belt device (2) and store them.

2. The machine for the plasma surface treatment of leather according to claim 1, characterized in that: The conveyor belt device (2) also includes a negative pressure mechanism, which includes a negative pressure plate (25) and a blower (26). The negative pressure plate (25) is installed between the upper and lower conveyor belts (23) of the conveyor belt device (2). The negative pressure plate (25) is hollow inside. Multiple negative pressure holes (251) are spaced apart along the length direction on the surface of the negative pressure plate (25). The exhaust port of the blower (26) is connected to the inside of the negative pressure plate (25) through a pipe. Multiple adsorption holes (231) corresponding to the multiple negative pressure holes (251) are spaced apart along the length direction of the conveyor belt (23).

3. The machine for plasma surface treatment of leather according to claim 1, characterized in that: A mounting frame (33) is provided above the conveyor belt device (2). An adjustment mechanism for adjusting the height of the plasma spray gun (32) is provided on the mounting frame (33). The adjustment mechanism includes a mounting base (34), a lead screw (35), a guide rod (36), and a sliding seat (37). The mounting base (34) is vertically fixed on the mounting frame (33). The lead screw (35) is vertically rotatably connected to the mounting base (34). The guide rod (36) is vertically fixed on the mounting base (34) and parallel to the lead screw (35). The sliding seat (37) is threadedly connected to the lead screw (35) and movably passes through the guide rod (36). The plasma spray gun (32) is vertically mounted on the sliding seat (37).

4. The leather plasma surface treatment machine according to claim 1, characterized in that: The loading device (4) and unloading device (5) both include a stacking lifting mechanism (41) and a gripping mechanism (42). The gripping mechanism (42) is used to cooperate with the stacking lifting mechanism (41) to grip the leather pieces on the stacking lifting mechanism (41) and place them on the conveyor belt device (2) or to grip the leather pieces on the conveyor belt device (2) and place them on the stacking lifting mechanism (41).

5. The machine for the treatment of the surface of leather according to claim 4, characterized in that: The stacking lifting mechanism (41) includes a base (411) and a support lifting assembly mounted on the base (411). The support lifting assembly includes a support plate (412), a vertical rod (413), and a driving component. The vertical rod (413) is vertically fixed on the base (411), and the support plate (412) is horizontally located above the base (411). The support plate (412) is movably inserted through the vertical rod (413), and the driving component drives the support plate (412) to move up and down.

6. The leather plasma surface treatment machine according to claim 5, characterized in that: Multiple vertical rods (413) are provided, and the multiple vertical rods (413) are distributed on both sides of the support plate (412) to enclose and form a space for placing the leather piece.

7. The machine for the treatment of the surface of leather according to claim 5, characterized in that: It also includes a pushing mechanism. Two supporting and lifting components are provided, and the two supporting and lifting components are spaced apart above the base (411). The pushing mechanism is used to push and switch one of the supporting and lifting components to the loading or unloading station below the gripping mechanism (42).

8. The machine for the treatment of the surface of leather according to claim 7, characterized in that: The pushing mechanism includes a support frame (416) and a pushing cylinder (417). The pushing cylinder (417) is mounted on the support frame (416), and the base (411) is slidably mounted on the support frame (416). The telescopic shaft of the pushing cylinder (417) is fixedly connected to the base (411).

9. The machine for the treatment of the surface of leather according to claim 4, characterized in that: The gripping mechanism (42) includes a fixed frame (421), a horizontal moving component, a vertical moving component, and a suction cup component. The horizontal moving component includes a horizontal slide (422) and a drive source. The horizontal slide (422) is slidably connected to the fixed frame (421), and the drive source drives the horizontal slide (422) to move horizontally. The vertical moving component includes a mounting block (424) and a vertical cylinder (425). The vertical cylinder (425) is mounted on the horizontal slide (422), and the mounting block (424) is vertically slidably connected to the side wall of the slider. The telescopic shaft of the vertical cylinder (425) is fixedly connected to the mounting block (424), and the suction cup component is mounted on the mounting block (424).

10. The leather plasma surface treatment machine according to claim 1, characterized in that: It also includes an electrical control box (11) and a roller meter counter (39). The roller meter counter (39) is mounted on a mounting frame (33). The roller of the roller meter counter (39) is in contact with the conveyor belt (23) of the conveyor belt device (2). The electrical control box (11) receives the distance signal of the movement of the conveyor belt (23) output by the roller meter counter (39). The electrical control box (11) controls the plasma spray gun (32) to work when the leather plate approaches the plasma spray gun (32) according to the signal of the roller meter counter (39).

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