Fiber waste treatment device for artificial leather processing

Abstract

The invention relates to the technical field of artificial leather, in particular to a fiber waste treatment device for artificial leather processing, which comprises a pre-cutting knife group, a fine crushing knife group, a pre-cutting main shaft, a pre-cutting auxiliary shaft, crushing knife teeth, a honeycomb rotating cylinder, a storage cylinder, a horizontal transverse groove and a fixed barbed nail, when fragments formed by tearing of the pre-cutting knife group slide into the fine crushing knife group in an accelerated manner through a conical inclined surface, the rotating motor drives the honeycomb rotating drum to rotate at a high speed to generate centrifugal force, and fiber fragments are forced to slide into the storage drum along the side wall of the honeycomb rotating drum and cling to a horizontal transverse groove in the tail end of the storage drum; when the storage barrel carries fiber waste to pass through the fixed barbed nail area, the fixed barbed nails stretching into the horizontal transverse grooves hook fiber bundles, the centrifugal force generated by continuous rotation of the rotary barrel and the anchoring resistance of the barbed nails form antagonistic stretching, fibers are forced to be broken at the tension concentration point, and therefore the fiber waste is further broken.

Description

Technical Field

[0001] The invention relates to the technical field of artificial leather, in particular to a fiber waste processing device for artificial leather processing. Background Art

[0002] Artificial leather (also known as synthetic leather) is a fabric-based imitation leather material coated with synthetic resins such as polyvinyl chloride (PVC) and polyurethane (PU), along with additives. PU synthetic leather accounts for the largest proportion of this category and is becoming increasingly mainstream due to its eco-friendliness and versatility. It is primarily used in shoe, apparel, furniture, and luggage leather. Driven by environmental policies and consumer upgrades, the industry is transitioning towards high-end, intelligent, and eco-friendly production.

[0003] The production and processing of artificial leather can be summarized into four steps: first, the base fabric is processed, and knitted fabric, non-woven fabric or microfiber non-woven fabric is selected as the base, which is impregnated with polyurethane resin solution and dried with hot air to form a high-strength and stable base material; then the slurry preparation stage is entered, and the PU resin, solvent, color paste and functional additives are accurately mixed. After the mixing is completed, the slurry needs to be coated on the base fabric by blade coating or release paper transfer, and dried to form a film to achieve accurate reproduction of the imitation leather texture; finally, after post-processing processes such as embossing and sanding, it can be shipped after passing quality inspection.

[0004] Fiber waste is generated at multiple stages of the aforementioned production process, such as scraps and resin-containing fabric fragments left over from the base fabric processing stage, and short fiber dust shed during sanding and embossing during post-finishing. These fiber wastes have value for recycling and reuse after crushing. However, the single fibers in these fiber wastes are very long and have strong tensile strength. Their high toughness results in shear resistance far exceeding that of conventional plastics. At the same time, residual PVC plasticizers or PU coatings form a sticky surface, which ultimately causes the fiber waste to gradually entangle around the crushing blades and motor shaft during the crushing operation, reducing the effective cutting depth of the blades. Repeated crushing is required to achieve the target particle size, resulting in a decrease in unit production capacity and a surge in processing energy consumption. On the other hand, the accumulation of entangled fiber waste will hinder heat dissipation and cause the motor to heat up. Excessive entanglement, forming large entanglements, will cause the motor rotor to lose dynamic balance, threatening the safety of the entire machine. These problems directly hinder the large-scale and efficient recycling of fiber waste.

[0005] In view of this, in order to overcome the above technical problems, the present invention provides a fiber waste processing device for artificial leather processing. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, the present invention solves the technical problems thereof by adopting a technical solution as follows: a fiber waste processing device for artificial leather processing according to the present invention comprises a housing with a feed port formed on the upper portion of the housing; and further comprises:

[0007] A pre-cutter assembly is installed above the housing and breaks the long-fiber waste fed from the feed port into fragments by differential tearing;

[0008] A fine shredding knife group is installed below the housing and is used to further shred the fiber waste into a target particle size by constrained tensile fracture;

[0009] The material receiving port is provided between the pre-cutting knife group and the fine-crushing knife group, and is used to connect the internal space of the shell where the pre-cutting knife group and the fine-crushing knife group are located.

[0010] Preferably, the shell space where the pre-cutter group is located is an elliptical space, and the pre-cutter group includes a pre-cutting main shaft and a pre-cutting auxiliary shaft that rotate in opposite directions, and the pre-cutting main shaft and the pre-cutting auxiliary shaft are fixedly connected with cutting teeth that are evenly arrayed at equal distances on the shaft body.

[0011] Preferably, the feed port is opened between the driving motors of the pre-cutting main shaft and the pre-cutting secondary shaft, and the cutting teeth of the pre-cutting main shaft and the pre-cutting secondary shaft are staggered on the shaft body.

[0012] Preferably, the speed of the driving motor of the pre-cutting main shaft is higher than that of the pre-cutting secondary shaft, and the cutting teeth on the two shaft bodies are tilted and the tooth tips are in opposite directions.

[0013] Preferably, the discharge port at the bottom of the shell is connected to the negative pressure fan, and the upper surface of the receiving port is a conical inclined surface.

[0014] Preferably, the fine crushing knife group includes:

[0015] A rotating motor, wherein the rotating motor is fixedly mounted on a motor base at the bottom of the housing;

[0016] A honeycomb rotating drum, the honeycomb rotating drum is fixedly connected to the driving shaft of the rotating motor, the side wall of the honeycomb rotating drum is evenly and equidistantly provided with outwardly protruding storage drums, and the end surface of the storage drum is evenly and equidistantly provided with multiple groups of horizontal transverse grooves;

[0017] The fixed spike is fixedly connected to the inner wall of the shell, and the installation position matches the opening height of the horizontal transverse groove.

[0018] Preferably, the honeycomb drum generates centrifugal force when rotating, so that the fiber waste is tightly attached to the end of the storage barrel; the length of the fixed spikes can just extend into the horizontal groove at the end of the storage barrel, and the fiber waste is stretched and broken by the confrontation between the centrifugal force and the resistance of the fixed spikes.

[0019] Preferably, the fixed spikes are conical spikes, and the number of groups of fixed spikes at the same height is half the number of the storage tubes.

[0020] Preferably, the inner wall of the honeycomb rotating drum is mirror-polished, and a rounded transition is made between the storage cylinder and the honeycomb rotating drum.

[0021] Preferably, the outlet at the lower end of the receiving port extends into the interior of the honeycomb drum, and the surface of the fixed spikes is subjected to wear-resistant strengthening treatment.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. After the drive motors of the counter-rotating pre-cutting main shaft and pre-cutting secondary shaft are started synchronously, the pre-cutting main shaft rotates counterclockwise at a speed higher than that of the pre-cutting secondary shaft, driving the shredding teeth arranged in a staggered manner on its shaft surface to pull the fiber upward; the pre-cutting secondary shaft rotates clockwise, and its shredding teeth simultaneously press down the material. The pulling action of the shredding teeth of the pre-cutting main shaft and the pressing action of the shredding teeth of the pre-cutting secondary shaft form a reverse torque, causing the fiber waste to break into small segments under the combined action of shredding and stretching, and eventually fall from the material receiving port; the staggered shredding teeth have the effect of eliminating the risk of collision during rotation from a geometric level.

[0024] 2. When the fragments torn by the pre-cutting knife group slide into the fine shredding knife group through the conical inclined surface at an accelerated speed, the rotating motor drives the honeycomb drum to rotate at high speed to generate centrifugal force, forcing the fiber fragments to slide along the side wall of the honeycomb drum and cling to the horizontal groove at the end of the drum; when the drum carrying fiber waste passes through the fixed spike area, the fixed spikes inserted into the horizontal groove hook the fiber bundles, and the centrifugal force of the continuous rotation of the drum and the anchoring resistance of the spikes form an antagonistic stretching, forcing the fibers to break at the tension concentration point, thereby achieving further crushing of the fiber waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 2 It is a cross-sectional view of the overall structure of the present invention;

[0028] Figure 3 is a three-dimensional structural cross-sectional view of the pre-cutting knife assembly of the present invention;

[0029] Figure 4 This is a sectional view of the three-dimensional structure of the fine crushing knife assembly of the present invention;

[0030] Figure 5 yes Figure 4 A in the enlarged view.

[0031] In the figure: 1. Shell; 2. Feed inlet; 3. Pre-cutting knife group; 4. Fine shredding knife group; 5. Receiving port; 6. Pre-cutting main shaft; 7. Pre-cutting secondary shaft; 8. Shredding knife teeth; 9. Driving motor; 10. Discharge port; 11. Rotating motor; 12. Motor base; 13. Honeycomb rotating drum; 14. Storage drum; 15. Horizontal cross groove; 16. Fixed spikes. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0033] like Figures 1 to 5 As shown, an embodiment of the present invention provides a fiber waste processing device for artificial leather processing, comprising a housing 1, wherein a feed port 2 is provided on the upper portion of the housing 1; and further comprising:

[0034] A pre-cutter group 3 is installed above the housing 1 and breaks the long-fiber waste fed from the feed port 2 into fragments by differential tearing;

[0035] A fine-crushing knife group 4 is installed below the housing 1 and is used to further crush the fiber waste fragments into a target particle size by constrained tensile fracture;

[0036] The material receiving opening 5 is provided between the pre-cutting knife group 3 and the fine-crushing knife group 4 and is used to connect the internal space of the housing 1 where the pre-cutting knife group 3 and the fine-crushing knife group 4 are located.

[0037] As an embodiment of the present invention, the space of the shell 1 where the pre-cutting knife group 3 is located is an elliptical space, and the pre-cutting knife group 3 includes a pre-cutting main shaft 6 and a pre-cutting secondary shaft 7 that rotate in opposite directions, and the pre-cutting main shaft 6 and the pre-cutting secondary shaft 7 are fixedly connected with cutting teeth 8 that are evenly arrayed at equal intervals on the shaft body.

[0038] As an embodiment of the present invention, the feed port 2 is opened between the drive motor 9 of the pre-cutting main shaft 6 and the pre-cutting secondary shaft 7, and the cutting teeth 8 of the pre-cutting main shaft 6 and the pre-cutting secondary shaft 7 are staggered on the shaft body.

[0039] As an embodiment of the present invention, the speed of the driving motor 9 of the pre-cutting main shaft 6 is higher than that of the pre-cutting secondary shaft 7, and the cutting teeth 8 on the two shaft bodies are tilted and the tooth tips are in opposite directions.

[0040] When the long fiber waste generated during the production and processing of artificial leather is put into the feed port 2, the feed port 2 is located between the drive motor 9 of the pre-cutting main shaft 6 and the pre-cutting secondary shaft 7, ensuring that the material directly enters the action area; the pre-cutting knife group 3 is installed above the shell 1, and the space in which it is located is elliptical to optimize the flow of material. The pre-cutting knife group 3 includes a pre-cutting main shaft 6 and a pre-cutting secondary shaft 7 that rotate in opposite directions. The two shafts are fixedly connected with equidistant and uniformly arrayed cutting teeth 8. The teeth are staggered and tilted, and the tooth tips are in opposite directions. The speed of the pre-cutting main shaft 6 is higher than that of the pre-cutting secondary shaft 7 to form a differential speed, forcing the fiber waste to be dynamically torn in the elliptical space: the counter-rotating After the driving motors 9 of the pre-cutting main shaft 6 and the pre-cutting secondary shaft 7 are started synchronously, the pre-cutting main shaft 6 rotates counterclockwise at a speed higher than that of the pre-cutting secondary shaft 7, driving the shredding teeth 8 arranged in an offset manner on the surface of its shaft body to pull the fiber upward; the pre-cutting secondary shaft 7 rotates clockwise, and its shredding teeth 8 press the material downward synchronously. The pulling action of the shredding teeth 8 of the pre-cutting main shaft 6 and the pressing action of the shredding teeth 8 of the pre-cutting secondary shaft 7 form a reverse torque, so that the fiber waste is broken into small segments under the combined action of shredding and stretching, and finally falls from the receiving port 5; the offset shredding teeth 8 have the effect of eliminating the risk of collision during rotation from a geometric level.

[0041] As an embodiment of the present invention, the discharge port 10 at the bottom of the shell 1 is connected to the negative pressure fan, and the upper surface of the receiving port 5 is a conical inclined surface.

[0042] As an embodiment of the present invention, the fine crushing knife group 4 includes:

[0043] A rotating motor 11, wherein the rotating motor 11 is fixedly mounted on a motor base 12 at the bottom of the housing 1;

[0044] A honeycomb rotating drum 13 is fixedly connected to the drive shaft of the rotating motor 11. The sidewall of the honeycomb rotating drum 13 is evenly and equidistantly provided with outwardly protruding storage drums 14. The distal end surface of the storage drum 14 is evenly and equidistantly provided with multiple groups of horizontal transverse grooves 15.

[0045] The fixed spike 16 is fixedly connected to the inner wall of the housing 1 , and the installation position matches the opening height of the horizontal transverse groove 15 .

[0046] As an embodiment of the present invention, the honeycomb drum 13 generates centrifugal force when rotating, so that the fiber waste is tightly attached to the end of the storage barrel 14; the length of the fixed spikes 16 can just extend into the horizontal groove 15 at the end of the storage barrel 14, and the tensile fracture of the fiber waste is achieved through the confrontation between the centrifugal force and the resistance of the fixed spikes 16.

[0047] As an embodiment of the present invention, the fixed spikes 16 are conical spikes, and the number of groups of fixed spikes 16 at the same height is half the number of the storage tubes 14 .

[0048] During operation, although the inner cavity of the shell 1 where the primary cutting knife group is located is designed to be elliptical, it is still difficult to avoid the situation where the artificial leather fiber waste is easily accumulated in the inner cavity of the shell 1 where the primary cutting knife group is located. For this reason, the upper surface of the receiving port 5 is designed to be a conical slope, so that the fiber waste falling at the beginning of the receiving port 5 can slide along the slope to the fine shredding knife group 4; on the other hand, the discharge port 10 at the bottom of the shell 1 is connected to the negative pressure fan (not shown in the drawings) to form a directional airflow, which works together with the conical slope design of the upper surface of the receiving port 5 to further guide the flow direction of the fiber waste; the fine shredding knife group 4 includes a fan fixed at the bottom of the shell 1. The motor 11 of the motor seat at the bottom of the shell 1 has a motor drive shaft fixedly connected to the honeycomb drum 13. The side wall of the honeycomb drum 13 is evenly distributed with outward protruding storage cylinders 14, and the end surface of the storage cylinder 14 is provided with multiple groups of horizontal transverse grooves 15; the inner wall of the shell 1 is fixedly installed with a conical fixed spike 16 that matches the height of the transverse groove, and its length can just extend into the interior of the transverse groove; when the fragments torn by the pre-cutting knife group 3 slide into the fine shredding knife group 4 through the conical inclined surface, the rotating motor 11 drives the honeycomb drum 13 to rotate at a high speed to generate centrifugal force, forcing the fiber fragments to slide along the side wall of the honeycomb drum 13 and the storage cylinder 14, close to the fiber fragments. At the horizontal transverse groove 15 at the end of the storage barrel 14; when the storage barrel 14 carries the fiber waste through the fixed thorn pin 16 area, the fixed thorn pin 16 extending into the horizontal transverse groove 15 hooks the fiber bundle, and the centrifugal force of the continuous rotation of the drum and the anchoring resistance of the thorn pin form an antagonistic stretching, forcing the fiber to break at the tension concentration point, thereby achieving further crushing of the fiber waste; due to the design of halving the number of fixed thorn pins 16 at the same height, the fixed thorn pins 16 are placed at intervals relative to the storage barrel 14, so that the fiber waste further crushed by the fixed thorn pin 16 and the storage barrel 14 works. There is enough space to leak out from the horizontal transverse groove 15, and it is quickly pulled out from the horizontal transverse groove 15 under the traction of the negative pressure airflow, avoiding the possibility of being broken and accumulated in the storage barrel 14 due to the overly dense arrangement of the fixed spikes 16; the broken fiber waste is quickly pulled out from the horizontal transverse groove 15 under the traction of the negative pressure airflow; during the whole process, the centrifugal force generated by the continuously rotating honeycomb drum 13 works together with the negative pressure fan, so that the fiber waste entering the honeycomb drum 13 will not adhere to the inner wall of the honeycomb drum 13, but will be centrifugally attached so that the fibers are evenly distributed at the end of the storage barrel 14.

[0049] As an embodiment of the present invention, the inner wall of the honeycomb rotating drum 13 is mirror-polished, and a rounded transition is made between the storage drum 14 and the honeycomb rotating drum 13 .

[0050] As an embodiment of the present invention, the lower end outlet of the receiving port 5 extends into the interior of the honeycomb drum 13, and the surface of the fixed spikes 16 is subjected to wear-resistant strengthening treatment.

[0051] During operation, the pre-cut fiber fragments are accelerated by the conical inclined surface and accurately introduced through the receiving port 5 deep inside the honeycomb drum 13. The mirror inner wall causes the fibers to produce a slip effect at the moment of contact, and the centrifugal force forces the fragments to slide quickly along the polished surface to the end of the storage drum 14. The rounded transition structure avoids turbulent vortices and guides the fibers to enter the working area of ​​the storage drum 14 without obstruction; when the drum rotates at high speed, the mirror polished inner wall and the centrifugal force work together to weaken the adhesion of the fibers to the inner wall, so that the residual fiber waste is all collected at the end of the storage drum 14; during the periodic hooking and stretching, the wear-resistant surface of the fixed spike 16 resists the micro-cutting caused by fiber breakage, ensuring that the tip of the conical spike maintains puncture accuracy.

[0052] The above shows and describes the basic principles, main features, and significant advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above specific embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and improvements to adapt to different usage environments and customer needs. Such changes and improvements fall within the scope of protection of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A fiber waste processing device for artificial leather processing, comprising a housing (1), wherein a feed port (2) is provided on the upper portion of the housing (1); characterized in that: Also includes: A pre-cutter group (3), the pre-cutter group (3) being installed above the housing (1), and the pre-cutter group (3) breaking the long-fiber waste fed from the feed port (2) into fragments by differential tearing; A fine-crushing knife group (4), the fine-crushing knife group (4) is installed below the housing (1), and the fine-crushing knife group (4) further crushes the fiber waste fragments to a target particle size by constrained tensile fracture; A material receiving opening (5) is provided between the pre-cutting knife group (3) and the fine-crushing knife group (4) and is used to connect the internal space of the housing (1) where the pre-cutting knife group (3) and the fine-crushing knife group (4) are located.

2. The fiber waste processing device for artificial leather processing according to claim 1, characterized in that: The space of the housing (1) where the pre-cutting knife group (3) is located is an elliptical space. The pre-cutting knife group (3) comprises a pre-cutting main shaft (6) and a pre-cutting auxiliary shaft (7) that rotate in opposite directions. The pre-cutting main shaft (6) and the pre-cutting auxiliary shaft (7) are fixedly connected with cutting teeth (8) arranged in an equidistant and uniform array on the shaft body.

3. The fiber waste processing device for artificial leather processing according to claim 2, characterized in that: The feed port (2) is opened between the drive motor (9) of the pre-cutting main shaft (6) and the pre-cutting secondary shaft (7), and the chopping teeth (8) of the pre-cutting main shaft (6) and the pre-cutting secondary shaft (7) are staggered on the shaft body.

4. The fiber waste processing device for artificial leather processing according to claim 3, characterized in that: The driving motor (9) of the pre-cutting main shaft (6) has a higher rotation speed than the pre-cutting secondary shaft (7), and the chopping teeth (8) on the two shaft bodies are tilted and have opposite tooth tips.

5. The fiber waste processing device for artificial leather processing according to claim 1, characterized in that: The discharge port (10) at the bottom of the housing (1) is connected to a negative pressure fan, and the upper surface of the receiving port (5) is a conical inclined surface.

6. The fiber waste processing device for artificial leather processing according to claim 5, characterized in that: The fine crushing knife group (4) comprises: A rotating motor (11), wherein the rotating motor (11) is fixedly mounted on a motor base (12) at the bottom of the housing (1); A honeycomb rotating drum (13), wherein the honeycomb rotating drum (13) is fixedly connected to the driving shaft of the rotating motor (11), and a storage drum (14) protruding outward is evenly and equidistantly provided on the side wall of the honeycomb rotating drum (13), and a plurality of groups of horizontal transverse grooves (15) are evenly and equidistantly provided on the end surface of the storage drum (14); A fixed spike (16) is fixedly connected to the inner wall of the housing (1), and the installation position matches the opening height of the horizontal transverse groove (15).

7. The fiber waste processing device for artificial leather processing according to claim 6, characterized in that: The honeycomb drum (13) generates centrifugal force when rotating, causing the fiber waste to cling to the end of the storage drum (14); the length of the fixed spikes (16) is just enough to extend into the horizontal grooves (15) at the end of the storage drum (14), and the fiber waste is stretched and broken by the confrontation between the centrifugal force and the resistance of the fixed spikes (16).

8. The fiber waste processing device for artificial leather processing according to claim 6, characterized in that The fixed spikes (16) are conical spikes, and the number of groups of fixed spikes (16) at the same height is half the number of the storage tubes (14).

9. The fiber waste processing device for artificial leather processing according to claim 6, characterized in that: The inner wall of the honeycomb rotating drum (13) is mirror-polished, and a rounded transition is performed between the storage drum (14) and the honeycomb rotating drum (13).

10. The fiber waste processing device for artificial leather processing according to claim 6, characterized in that: The lower end outlet of the receiving port (5) extends into the interior of the honeycomb drum (13), and the surface of the fixed spikes (16) is subjected to wear-resistant strengthening treatment.

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