Cutting machine for leather goods production

Abstract

The present invention relates to a cutting machine for leather goods production, comprising a pulse roller and a tensioning roller. The pulse roller further comprises a buffer layer. The outer wall of the buffer layer is provided with a plurality of evenly distributed pores. The ends of the buffer layer away from each other are fixedly connected with a plurality of symmetrically arranged brackets. The outer wall of the bracket is rotatably connected with a pulse shell. The above structure is adopted to realize pulse wrinkle removal. The superficial wrinkles and unevenness on the surface of the leather are eliminated by the pulse roller. At the same time, the pulse airflow is used for preliminary cleaning to remove large particles of dust and impurities. The positive pressure output provided by the cylinder and the composite air pump system is adopted to accurately adjust the tension of the leather by the tensioning roller to ensure that the leather remains in a stable state during the cutting process. The tensioning roller and the dust removal roller are both equipped with dust suction structures, which can effectively absorb dust particles on the upper and lower surfaces of the leather. Through cleaning and dust removal, the leather surface can be ensured to be clean and tidy, thereby improving the accuracy and consistency of the cutting size.

Description

Technical Field

[0001] The invention relates to a cutting machine for making leather goods, in particular to a cutting machine for making leather goods applied in the field of cutting machines. Background Art

[0002] In the current manufacturing environment, leather products are widely used worldwide due to their unique texture, durability and beauty, and cover many fields such as footwear manufacturing, luggage production, automobile interior, furniture decoration and high-end clothing. However, in the leather processing process, the importance of leather cutting is particularly prominent. Its process level and technical equipment directly affect the quality of the finished product, production efficiency and utilization rate of raw materials. Traditional leather cutting technology mainly relies on manual operation or semi-automatic mechanical equipment, and there are a series of problems that cannot be ignored. First, manual cutting is inefficient, and the cutting accuracy is unstable due to human factors; secondly, although semi-automatic equipment has improved efficiency to a certain extent, it is still unable to cope with complex patterns, precise contours and small batch customization requirements. In addition, leather materials have strong elasticity and fiber structure characteristics. They are prone to deformation during the cutting process, and even cause unnecessary damage and waste due to improper control of cutting force and speed, which seriously affects the utilization rate of leather and the quality of products.

[0003] Chinese invention patent CN104498644B discloses a fully automatic leather cutting machine, which is mainly composed of a double-acting cylinder, a controller, an air source, a gantry, a workbench, a horizontal blade and a mold knife group. A feeding device is provided on one side of the gantry, and the manipulator in the feeding device sucks the leather material from the loading platform and puts it on the conveyor belt; a material taking device is provided on the other side of the gantry, and the semi-finished product taking manipulator in the material taking device sucks the cut semi-finished leather material from the cutting material conveyor belt and puts it into the semi-finished product box, and the waste material is sent to the waste box by the cutting material conveyor belt. The present invention simplifies the material cutting operation, and can cut out multiple blocks of materials required for leather processing at one time, so it has the characteristics of time saving, labor saving and high work efficiency; because the electric heating film is used to heat the tool, it is not only easier to cut the leather, but also reduces the preheating time; because the automatic feeding and taking device is used, the full automation of cutting is realized.

[0004] Chinese invention patent CN102574289A discloses an automatic feeding leather cutting machine, whose structure includes an automatically adjustable high-precision cutting device, a driving transverse frame, a driving longitudinal moving frame, a material conveyor belt, an equipment machine, a connecting support column, and a connecting support block. The automatically adjustable high-precision cutting device is arranged on the upper end of the driving transverse frame and is connected by transmission cooperation. The driving transverse frame is located above the material conveyor belt. The present invention is provided with a structure for automatically limiting the position of the cutting machine after it moves, which effectively prevents the vibration generated by the cutting machine from causing the cutting machine body to move, thereby causing deviations in the cutting of the leather. At the same time, a structure for automatically fine-tuning the position of the cutting blade is provided, which helps prevent the leather from needing to be cut twice, thereby affecting the cutting work.

[0005] Although the above design improves work efficiency to a certain extent and prevents deviations during leather cutting, it still has certain limitations, such as the inability to remove wrinkles and dust before cutting, which affects the flatness during cutting and the service life of the tool. Summary of the invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is to remove wrinkles and dust from the leather before cutting, and at the same time adjust the tension to make the leather more stable and the cutting surface smoother, remove dust and impurities on the surface of the leather, prevent them from adhering to the tool during cutting, and reduce the service life of the tool.

[0007] In order to solve the above problems, the present invention provides a cutting machine for leather production, including a pulse roller and a tensioning roller, the pulse roller further includes a buffer layer, the outer wall of the buffer layer is provided with a plurality of evenly distributed pores, the buffer layer is fixedly connected with a plurality of symmetrically arranged brackets at both ends, the outer walls of the symmetrically arranged brackets are rotatably connected with a pulse shell, the outer wall of the pulse shell is provided with a plurality of evenly distributed micropores, the outer wall of the pulse shell is contacted with leather, one of the symmetrically arranged brackets is fixedly connected with a pulse air source system through a pipeline, and the pulse air source system and the pulse shell are interconnected through the pipeline, the tensioning roller further includes an outlet pipe, the outer wall of the outlet pipe is fixedly connected with a spiral plate, the outer end of the spiral plate is fixedly connected with a cylinder, and one end of the cylinder is away from the outlet pipe A cone is fixedly connected, and an end of the cone away from the outlet pipe is fixedly connected to a dust exhaust pipe, an outer wall of the dust exhaust pipe is fixedly connected to a guide layer, and the other end of the guide layer is fixedly connected to the cylinder, the outer wall of the outlet pipe is rotatably connected to a dust collection shell, and an end of the dust collection shell away from the outlet pipe is rotatably connected to the dust exhaust pipe, the outer wall of the dust collection shell is in contact with the leather, and a plurality of evenly distributed dust collection holes are provided on the outer wall of the dust collection shell, the outer walls of the outlet pipe and the dust exhaust pipe are fixedly connected to a cylinder, the dust exhaust pipe is fixedly connected to a first ash hopper through a pipeline, the outlet pipe is fixedly connected to a compound air pump system through a negative pressure pipe, the compound air pump system is fixedly connected to a dust removal roller through a negative pressure pipe, the structure of the dust removal roller is the same as that of the tensioning roller, and the outer end of the dust removal roller is fixedly connected to a second ash hopper through a pipeline.

[0008] In the above-mentioned cutting machine for leather goods, the leather is wrinkle-removed by pulse pressure technology through a pulse roller, and preliminary cleaning is performed simultaneously to remove large particles of dust and impurities on the surface, thereby improving the flatness of the leather and the quality and aesthetics of subsequent products. The linkage design of the cylinder and the composite air pump system can automatically adjust the tensioning force of the tensioning roller according to the actual thickness and material of the leather to ensure the stability of the leather during the cutting process. In addition, the tensioning roller and the dust removal roller are equipped with an efficient negative pressure dust suction structure. Combined with the cyclone separation technology, they can efficiently absorb and separate the dust on the upper and lower surfaces when the leather passes by, effectively reducing environmental pollution and improving the accuracy and consistency of the cutting size.

[0009] As a further improvement of the present application, the pulse air source system includes a solenoid valve fixedly connected to a bracket via a pipeline, the solenoid valve is fixedly connected to an air bag via a pipeline, and the air bag is fixedly connected to a composite air pump system via a pipeline.

[0010] As a further improvement of the present application, the pulse housing is made of metal or alloy material, the buffer layer is made of material with high elasticity and excellent pressure resistance, and the diameter of the micropores is 100μm-200μm.

[0011] As another improvement of the present application, the taper of the cone is between 1:2 and 1:6, the spiral plate is made of metal or composite material, the spiral angle is between 10° and 30°, the pitch value of the spiral plate is between 20mm and 80mm, and the surface of the spiral plate is smoothed.

[0012] As another improved supplement of the present application, the cylinder is a double-acting type, and is connected to the compound air pump system through a pipeline. The cylinder is equipped with a pressure sensor and a position feedback device, and the pressure sensor and the position feedback device are electrically connected to the control system.

[0013] As another improved supplement of the present application, the tensioning roller is in contact with the upper surface of the leather, the dust removal roller is in contact with the lower surface of the leather, and the wrap angle between the leather, the tensioning roller and the dust removal roller is set between 120° and 160°.

[0014] As another improved supplement of the present application, the dust collection shell is made of a lightweight, wear-resistant and corrosion-resistant composite material or metal alloy, the dust collection holes on the dust collection shell are evenly distributed, and the shape of the dust collection holes is a flat oval, and the dust collection shell is rotatably connected to the outlet pipe and the dust exhaust pipe.

[0015] As another improvement of the present application, the compound air pump system has dual-mode working capability and can generate negative pressure and positive pressure output at the same time. The negative pressure gas is used for dust suction, and the positive pressure gas is used for pulse and tension adjustment. While meeting the negative pressure dust suction function required by the tensioning roller and the dust removal roller during the leather cutting process, it can also provide the pulse roller with precisely controllable positive pressure pulses. The compound air pump system has a built-in intelligent pressure regulation module, which can adjust the output positive and negative pressure values ​​in real time through the control algorithm according to actual needs.

[0016] The following steps are involved:

[0017] S1, pulse wrinkle removal, pulse wrinkle removal treatment is performed on leather through a pulse roller. The positive pressure gas generated by the pulse air source system enters the pulse shell through the pores of the buffer layer, and then acts on the leather surface through the micropores to eliminate superficial wrinkles and unevenness on the leather;

[0018] S2, preliminary cleaning, while eliminating superficial wrinkles, the pulse airflow can also perform preliminary pulse cleaning to remove large particles of dust and impurities on the leather surface, thus ensuring that the leather surface is preliminarily cleaned before entering the cutting process, which to a certain extent improves the quality and aesthetics of subsequent leather products;

[0019] S3, automatic tension adjustment. According to the thickness and material changes of leather, the pressure sensor and position feedback device on the double-acting cylinder, in conjunction with the positive pressure output provided by the compound air pump system, can realize automatic and precise tension adjustment of the leather by the tensioning roller, thus keeping the leather in a stable state during the cutting process.

[0020] S4, negative pressure dust suction, when the leather passes through the tensioning roller and the dust removal roller, the dust particles on the upper surface of the leather are sucked into the roller by the tensioning roller, and the dust particles on the lower surface of the leather are sucked into the roller by the dust removal roller;

[0021] S5, cyclone separation, the dust particles sucked into the drum by negative pressure are carried into the spiral plate by the air flow, forming a cyclone separation effect, and the dust is separated. The clean gas is pressurized by the composite air pump system and used for tension adjustment, pulse wrinkle removal and preliminary cleaning.

[0022] In summary, this solution has the following beneficial effects:

[0023] 1. Pulse wrinkle removal: The pulse roller can be used to precisely treat the leather with pulse pressure to eliminate superficial wrinkles and unevenness on the leather surface. At the same time, pulse airflow is used for preliminary cleaning to remove large particles of dust and impurities, thereby improving the quality and aesthetics of subsequent leather products.

[0024] 2. Automatic tension adjustment: The positive pressure output provided by the cylinder and the composite air pump system is used to automatically and accurately adjust the tension of the tension roller on the leather according to the thickness and material changes of the leather, ensuring that the leather remains in a stable state during the cutting process.

[0025] 3. Negative pressure dust removal: Both the tensioning roller and the dust removal roller are equipped with efficient dust suction structures, which can effectively absorb dust particles on the upper and lower surfaces when the leather passes through, and separate the dust from the gas through cyclone separation technology, which improves the dust removal effect and reduces environmental pollution. Through cleaning and dust removal, the leather surface can be ensured to be clean and tidy, thereby improving the accuracy and consistency of the cutting size.

[0026] 4. Integrated closed-loop operation: The device realizes the integrated integration of multiple process links such as pulse wrinkle removal, preliminary cleaning, tension adjustment, negative pressure vacuuming and cyclone separation, forming an efficient closed-loop operation process, which significantly improves the overall efficiency of the leather cutting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of this application;

[0028] Figure 2 Part of this application Figure 1 ;

[0029] Figure 3 Part of this application Figure 2 ;

[0030] Figure 4 A top view of the present application;

[0031] Figure 5It is the AA cross-sectional view of this application;

[0032] Figure 6 It is the BB cross-sectional view of this application;

[0033] Figure 7 It is the CC section view of this application;

[0034] Figure 8 This is the main view of this application;

[0035] Fig. 9 This is the DD cross-sectional view of this application.

[0036] Description of the numbers in the figure:

[0037] 1. Pulse roller; 2. Tension roller; 3. Buffer layer; 4. Air hole; 5. Bracket; 6. Pulse shell; 7. Micropore; 8. Leather; 9. Pulse air source system; 10. Outlet pipe; 11. Spiral plate; 12. Cylinder; 13. Cone; 14. Dust exhaust pipe; 15. Guide layer; 16. Dust suction shell; 17. Dust suction hole; 18. Cylinder; 19. First ash hopper; 20. Compound air pump system; 21. Dust removal roller; 22. Second ash hopper; 23. Solenoid valve; 24. Air bag. DETAILED DESCRIPTION

[0038] Three implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0039] The first implementation method:

[0040] Figure 1-Figure 9Shown is a cutting machine for leather goods, comprising a pulse roller 1 and a tensioning roller 2, the pulse roller 1 further comprising a buffer layer 3, the outer wall of the buffer layer 3 is provided with a plurality of evenly distributed pores 4, both ends of the buffer layer 3 are fixedly connected with a plurality of symmetrically arranged brackets 5, the outer wall of the symmetrically arranged brackets 5 is rotatably connected with a pulse shell 6, the outer wall of the pulse shell 6 is provided with a plurality of evenly distributed micropores 7, the outer wall of the pulse shell 6 is contacted with leather 8, one of the symmetrically arranged brackets 5 is fixedly connected with a pulse air source system 9 through a pipeline, and the pulse air source system 9 and the pulse shell 6 are interconnected through the pipeline, the tensioning roller 2 further comprises an outlet pipe 10, the outer wall of the outlet pipe 10 is fixedly connected with a spiral plate 11, the outer end of the spiral plate 11 is fixedly connected with a cylinder 12, the end of the cylinder 12 away from the outlet pipe 10 is fixedly connected with a cone 13, and the cone 13 is away from the outlet One end of the outlet pipe 10 is fixedly connected to a dust exhaust pipe 14, the outer wall of the dust exhaust pipe 14 is fixedly connected to a guide layer 15, and the other end of the guide layer 15 is fixedly connected to the cylinder 12, the outer wall of the outlet pipe 10 is rotatably connected to a dust collection shell 16, and the end of the dust collection shell 16 away from the outlet pipe 10 is rotatably connected to the dust exhaust pipe 14, the outer wall of the dust collection shell 16 is in contact with the leather 8, and the outer wall of the dust collection shell 16 is provided with a plurality of evenly distributed dust collection holes 17, the outer walls of the outlet pipe 10 and the dust exhaust pipe 14 are fixedly connected to a cylinder 18, the dust exhaust pipe 14 is fixedly connected to a first ash hopper 19 through a pipeline, the outlet pipe 10 is fixedly connected to a compound air pump system 20 through a negative pressure pipe, the compound air pump system 20 is fixedly connected to a dust removal roller 21 through a negative pressure pipe, the structure of the dust removal roller 21 is the same as that of the tensioning roller 2, and the outer end of the dust removal roller 21 is fixedly connected to a second ash hopper 22 through a pipeline.

[0041] The pulse drum 1 includes a buffer layer 3 inside, and a plurality of pores 4 are evenly arranged on the outer wall of the buffer layer 3. The buffer layer 3 plays a buffering role during the pulse process to prevent high-speed airflow from directly impacting the inner wall of the drum, thereby reducing noise and extending the service life of the equipment. The outer wall of the pulse housing 6 is provided with a plurality of evenly distributed micropores 7 to ensure uniform distribution of gas flow. The pulse gas source system 9 can control the frequency and time of the gas pulse to eliminate superficial wrinkles on the leather 8. The tensioning drum 2 can automatically adjust the tension and also has a dust removal function. A cyclone separation structure is arranged inside the tensioning drum 2. The spiral plate 11 can guide and accelerate the gas flow through its unique spiral structure design to form an effect similar to a cyclone separator, thereby increasing the contact time and centrifugal force action time between the gas and the dust particles, so that larger particles are more easily separated and deposited. The outer end of the spiral plate 11 is connected to the cylinder 12. When the airflow enters the cylinder 12 through the spiral plate 11, it is forced to rotate due to the tangential introduction. In this process, the gas speed increases, and the solid particles contained are thrown to the cylinder wall under the action of centrifugal force. As the gas continues to flow and passes through the cone 13 area, the gas is separated from the cylinder 12. The centrifugal force is more obvious, so that smaller particles that still have enough inertia can gradually approach the inner wall of the cone 13 and settle down. The design angle and size of the cone 13 directly affect the settling efficiency of the particles and the overall separation performance of the equipment. The transition design from the cylinder 12 to the cone 13 can effectively reduce the resistance and reduce the pressure loss when the gas flows through. The end of the cone 13 is connected to the dust exhaust pipe 14, and the outer wall of the dust exhaust pipe 14 is fixedly connected with a guide layer 15. The guide layer 15 made of wear-resistant material can resist the wear of the inner wall by the dust carried by the high-speed rotating airflow, and extend the service life of the equipment. During the service life, the dust collection shell 16 directly contacts the leather 8, and absorbs the dust on the surface of the leather 8 through a plurality of dust collection holes 17 opened on its surface. After cyclone separation, the dust separated by the tensioning roller 2 enters the first ash hopper 19 for collection, and the dust separated by the dust removal roller 21 enters the second ash hopper 22 for collection. The tensioning roller 2 cleans and removes dust from the upper surface of the leather 8, and the dust removal roller 21 cleans and removes dust from the lower surface of the leather 8. The dust removal effect is better, which indirectly improves the cutting accuracy. Cleaning and dust removal during pretreatment is helpful to maintain a good production environment and air quality.

[0042] The second implementation method:

[0043] Figure 1-Figure 9It is shown that the pulse air source system 9 includes a solenoid valve 23 fixedly connected to the bracket 5 through a pipeline, the solenoid valve 23 is fixedly connected to the air bag 24 through a pipeline, the air bag 24 is fixedly connected to the composite air pump system 20 through a pipeline, the pulse shell 6 is made of metal or alloy material, the buffer layer 3 is made of material with high elasticity and excellent pressure resistance, the diameter of the micropore 7 is 100μm-200μm, the taper of the cone 13 is between 1:2 and 1:6, the spiral plate 11 is made of metal or composite material, and the spiral angle is between 10° and 30°, the pitch value of the spiral plate 11 is between 20mm and 80mm, and the surface of the spiral plate 11 is smoothed, the cylinder 18 is a double-acting type, and the cylinder 18 is connected to the composite air pump system 20 through a pipeline, the cylinder 18 is equipped with a pressure sensor and a position feedback device, the pressure sensor and the position feedback device are electrically connected to the control system, the tensioning roller 2 and the upper surface of the leather 8 The dust removal roller 21 is in contact with the lower surface of the leather 8, and the wrap angle between the leather 8 and the tensioning roller 2 and the dust removal roller 21 is set between 120° and 160°. The dust suction shell 16 is made of a lightweight, wear-resistant and corrosion-resistant composite material or metal alloy. The dust suction holes 17 on the dust suction shell 16 are evenly distributed, and the shape of the dust suction holes 17 is a flat ellipse. The dust suction shell 16 is rotatably connected to the outlet pipe 10 and the dust exhaust pipe 14. The composite air pump system 20 has dual-mode working capability and can generate negative pressure and positive pressure outputs at the same time. Negative pressure gas is used for dust suction, and positive pressure gas is used for pulse and tension adjustment. While meeting the negative pressure dust suction function required by the tensioning roller 2 and the dust removal roller 21 during the cutting process of the leather 8, it can also provide the pulse roller 1 with a precisely controllable positive pressure pulse. The composite air pump system 20 has a built-in intelligent pressure regulating module, which can adjust the output positive and negative pressure values ​​in real time through a control algorithm according to actual needs.

[0044] The pulse gas source system 9 realizes air flow pulse on the leather 8 through the linkage of the electromagnetic valve 23, the air bag 24 and the composite air pump system 20. The pulse shell 6 made of metal or alloy material is matched with the buffer layer 3 with high elasticity and excellent pressure resistance, which ensures that the pulse pressure is evenly and stably transmitted to the leather 8, thereby improving the flatness of the leather 8 and further improving the processing quality of the leather 8. The diameter of the micropore 7 is 100μm-200μm, which helps to accurately control the gas flow, avoiding damage to the leather 8 and ensuring sufficient pulse strength. The cone 13 adopts an optimized taper range to effectively enhance the cyclone separation efficiency and reduce the impact of dust on the working environment. The spiral plate 11 is made of metal or composite material, and its surface is smoothed to reduce resistance. The spiral angle is set between 10° and 30°, and the pitch value is controlled between 20mm and 80mm. This design improves the air The effects of flow guidance and centrifugal separation enable most of the dust to be separated quickly. The fitting design of the leather 8, the tensioning roller 2 and the dust removal roller 21, as well as the specific wrap angle setting, can ensure that the leather 8 always maintains appropriate tension and flatness during the transportation process, while maximizing the dust removal effect and reducing environmental pollution. The dust collection shell 16 is made of lightweight, wear-resistant and corrosion-resistant composite materials or metal alloys. The flat elliptical dust collection holes 17 can more effectively capture and remove fine particles generated by the cutting of the leather 8, further improving the overall cleaning performance of the equipment. The composite air pump system 20 can not only generate negative pressure for the dust collection roller to achieve efficient dust removal, but also provide positive pressure to drive the pulse roller 1 to achieve dynamic tensioning of the leather 8. The built-in intelligent pressure regulation module can monitor and automatically adjust the output pressure value in real time, and flexibly switch the working mode according to actual operation requirements to ensure that the entire cutting process is smooth and energy-efficient.

[0045] The third implementation method:

[0046] Figure 1-Figure 9 Shown, including the following steps:

[0047] S1, pulse wrinkle removal, pulse wrinkle removal treatment is performed on leather 8 by pulse roller 1, and positive pressure gas generated by pulse air source system 9 enters pulse housing 6 through air holes 4 of buffer layer 3, and then acts on the surface of leather 8 through micropores 7 to eliminate superficial wrinkles and unevenness on leather 8;

[0048] S2, preliminary cleaning, while eliminating superficial wrinkles, the pulse airflow can also perform preliminary pulse cleaning to remove large particles of dust and impurities on the surface of the leather 8, thereby ensuring that the surface of the leather 8 is preliminarily cleaned before entering the cutting process, which to a certain extent improves the quality and aesthetics of subsequent leather products;

[0049] S3, automatic tension adjustment. According to the thickness and material changes of the leather 8, the pressure sensor and position feedback device on the double-acting cylinder 18 are used in conjunction with the positive pressure output provided by the composite air pump system 20 to achieve automatic and precise tension adjustment of the leather 8 by the tension roller 2, so as to keep the leather 8 in a stable state during the cutting process.

[0050] S4, negative pressure dust suction, when the leather 8 passes through the tensioning roller 2 and the dust removal roller 21, the dust particles on the upper surface of the leather 8 are sucked into the roller by the tensioning roller 2, and the dust particles on the lower surface of the leather 8 are sucked into the roller by the dust removal roller 21;

[0051] S5, cyclone separation, the dust particles sucked into the drum by the negative pressure are entrained by the air flow into the spiral plate 11, forming a cyclone separation effect, and the dust is separated. The clean gas is pressurized by the composite air pump system 20 and used for tension adjustment, pulse wrinkle removal and preliminary cleaning.

[0052] Working principle: Before cutting the leather 8, the leather is pretreated. When the leather 8 moves, it drives the pulse roller 1 to rotate. At the same time, the positive-pressure gas generated by the composite air pump system 20 enters the air bag 24 through the pipeline. The pressure and pulse frequency can be adjusted according to the thickness and quality of the leather 8. When the air bag 24 reaches the preset pressure, the solenoid valve 23 is opened, and the gas enters the buffer layer 3 through the pipeline. The gas is evenly transferred to the pulse shell 6 through the pores 4. When the leather 8 passes through the pulse shell 6, the micropores 7 on the surface of the shell instantly release the high-pressure gas to the surface of the leather 8, and the pulse pressure is used to effectively remove superficial wrinkles and uneven parts on the leather.

[0053] During pulse wrinkle removal, the high-speed pulse airflow generated in this process can also remove large particles of dust and impurities attached to the surface of the leather 8, completing the initial cleaning and ensuring that the leather reaches an ideal clean and flat state before entering formal cutting.

[0054] When the leather 8 is transmitted to the tensioning roller 2, the pressure sensor and position feedback device of the double-acting cylinder 18 monitor the thickness and material changes of the leather in real time, and send the data information to the control system. The compound air pump system 20 adjusts its positive pressure output according to the received data to realize automatic tension adjustment of the leather, keeping the leather 8 in a stable and appropriate tension state throughout the cutting process, and the cylinders 18 at both ends of the tensioning roller 2 are adjusted synchronously to ensure that the leather always maintains stable tension and good flatness during the cutting process. At the same time, the compound air pump system 20 generates negative pressure to act on the tensioning roller 2. Under the action of negative pressure, the dust on the upper surface of the leather 8 enters the dust suction hole 17 with the air flow, and then flows into the inlet of the cyclone separation device through the guide layer 15. The air flow enters the cylinder 12 through the inlet along the spiral plate 11 for cyclone separation. After separation, the dust enters the dust exhaust pipe 14 and is discharged into the first ash hopper 19. The clean air enters the compound air pump system 20 through the outlet pipe 10 to complete the dust removal on the upper surface of the leather 8.

[0055] When the leather 8 passes through the dust removal roller 21, the dust suction structure identical to the tensioning roller 2 synchronously absorbs the dust particles on the lower surface of the leather 8. The dust particles sucked into the roller enter the spiral plate 11 with the airflow. Due to the cyclone effect formed by the design of the spiral plate 11, the dust particles are efficiently separated due to the centrifugal force. After negative pressure cyclone separation, the dust and particulate matter enter the second ash hopper 22, and the clean gas enters the compound air pump system 20 to complete the dust removal on the upper surface of the leather 8. The gas pressurized by the compound air pump system 20 is recycled for use in the tensioning adjustment, pulse wrinkle removal and preliminary cleaning of the leather 8, forming an efficient closed-loop operation process, thereby improving the quality and efficiency of the entire leather 8 cutting process.

[0056] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A cutting machine for leather goods production, characterized in that: The invention comprises a pulse roller (1) and a tensioning roller (2), wherein the pulse roller (1) further comprises a buffer layer (3), the outer wall of the buffer layer (3) is provided with a plurality of evenly distributed pores (4), both ends of the buffer layer (3) are fixedly connected to symmetrically arranged brackets (5), the outer wall of the symmetrically arranged brackets (5) is rotatably connected to a pulse housing (6), the outer wall of the pulse housing (6) is provided with a plurality of evenly distributed micropores (7), the outer wall of the pulse housing (6) is contacted with leather (8), one of the symmetrically arranged brackets (5) is fixedly connected to a pulse air source system (9) via a pipeline, and the pulse air source system (9) and the pulse housing (6) are interconnected via the pipeline, and the tensioning roller (2) further comprises an outlet pipe (10), the outer wall of the outlet pipe (10) is fixedly connected to a spiral plate (11), the outer end of the spiral plate (11) is fixedly connected to a cylinder (12), the end of the cylinder (12) away from the outlet pipe (10) is fixedly connected to a cone (13), and the cone (13) away from the outlet pipe (10) is fixedly connected to the outer end of the cone (13). The outer wall of the dust collection tube (14) is fixedly connected to a dust exhaust pipe (14), the outer wall of the dust collection tube (14) is fixedly connected to a guide layer (15), and the other end of the guide layer (15) is fixedly connected to the cylinder (12); the outer wall of the outlet pipe (10) is rotatably connected to a dust collection shell (16), and one end of the dust collection shell (16) away from the outlet pipe (10) is rotatably connected to the dust exhaust pipe (14); the outer wall of the dust collection shell (16) is in contact with the leather (8), and the outer wall of the dust collection shell (16) is provided with a plurality of evenly distributed dust collection holes (17). The outer walls of the outlet pipe (10) and the dust exhaust pipe (14) are both fixedly connected to a cylinder (18); the dust exhaust pipe (14) is fixedly connected to a first ash hopper (19) via a pipeline; the outlet pipe (10) is fixedly connected to a composite air pump system (20) via a negative pressure pipe; the composite air pump system (20) is fixedly connected to a dust removal roller (21) via a negative pressure pipe; the structure of the dust removal roller (21) is the same as that of the tensioning roller (2); and the outer end of the dust removal roller (21) is fixedly connected to a second ash hopper (22) via a pipeline; The taper of the cone (13) is between 1:2 and 1:6, the spiral plate (11) is made of metal or composite material, and the spiral angle is between 10° and 30°, the pitch of the spiral plate (11) is between 20 mm and 80 mm, and the surface of the spiral plate (11) is smoothed; The tensioning roller (2) is in contact with the upper surface of the leather (8), the dust removal roller (21) is in contact with the lower surface of the leather (8), and the wrap angle between the leather (8) and the tensioning roller (2) and the dust removal roller (21) is set between 120° and 160°.

2. A leather goods cutting machine according to claim 1, characterized in that: The pulse air source system (9) comprises a solenoid valve (23) fixedly connected to a bracket (5) via a pipeline, the solenoid valve (23) is fixedly connected to an air bag (24) via a pipeline, and the air bag (24) is fixedly connected to a composite air pump system (20) via a pipeline.

3. A leather goods cutting machine according to claim 1, characterized in that: The pulse housing (6) is made of metal or alloy material, the buffer layer (3) is made of a material with high elasticity and excellent pressure resistance, and the diameter of the micropore (7) is 100 μm-200 μm.

4. The leather goods cutting machine according to claim 1, characterized in that: The cylinder (18) is of a double-acting type, and is connected to a composite air pump system (20) via a pipeline. The cylinder (18) is equipped with a pressure sensor and a position feedback device, and the pressure sensor and the position feedback device are electrically connected to a control system.

5. The leather goods cutting machine according to claim 1, characterized in that: The dust collection shell (16) is made of a lightweight, wear-resistant and corrosion-resistant composite material or metal alloy; the dust collection holes (17) on the dust collection shell (16) are evenly distributed, and the dust collection holes (17) are in a flat elliptical shape; the dust collection shell (16) is rotatably connected to the outlet pipe (10) and the dust exhaust pipe (14).

6. The leather goods cutting machine according to claim 1, characterized in that: The composite air pump system (20) has dual-mode working capability and can generate negative pressure and positive pressure outputs simultaneously. The negative pressure gas is used for dust collection, and the positive pressure gas is used for pulse and tension adjustment. While satisfying the negative pressure dust collection function required by the tensioning roller (2) and the dust removal roller (21) during the leather (8) cutting process, it can also provide the pulse roller (1) with a precisely controllable positive pressure pulse. The composite air pump system (20) has a built-in intelligent pressure regulating module, which can adjust the output positive and negative pressure values ​​in real time according to actual needs through a control algorithm.

7. A leather goods cutting machine according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1, pulse wrinkle removal, pulse wrinkle removal treatment is performed on leather (8) by a pulse roller (1), positive pressure gas generated by a pulse air source system (9) enters the pulse housing (6) through the pores (4) of the buffer layer (3), and then acts on the surface of the leather (8) through the micropores (7), thereby removing superficial wrinkles and unevenness on the leather (8); S2, preliminary cleaning, while eliminating superficial wrinkles, the pulse airflow can also perform preliminary pulse cleaning to remove large particles of dust and impurities on the surface of the leather (8), thereby ensuring that the surface of the leather (8) is preliminarily cleaned before entering the cutting process, and to a certain extent, improve the quality and aesthetics of subsequent leather products; S3, automatic tension adjustment, according to the thickness and material changes of the leather (8), through the pressure sensor and position feedback device on the double-acting cylinder (18), in conjunction with the positive pressure output provided by the composite air pump system (20), the tension roller (2) automatically and accurately adjusts the tension of the leather (8), thereby maintaining the leather (8) in a stable state during the cutting process; S4, negative pressure dust suction, when the leather (8) passes through the tensioning roller (2) and the dust removal roller (21), dust particles on the upper surface of the leather (8) are sucked into the interior of the roller by the tensioning roller (2), and dust particles on the lower surface of the leather (8) are sucked into the interior of the roller by the dust removal roller (21); S5, cyclone separation, the dust particles sucked into the drum by the negative pressure are entrained by the air flow and enter the spiral plate (11), forming a cyclone separation effect, and the dust is separated. The clean gas is pressurized by the composite air pump system (20) and used for tension adjustment, pulse wrinkle removal and preliminary cleaning.

Images