Recovery device for plastic woven bags

The adjustable surface hooking mechanism is used to cut and separate plastic woven bags, which solves the problem of low recycling quality of plastic woven bags in the existing technology and realizes efficient wire harness separation and secondary utilization.

CN121246085AInactive Publication Date: 2026-01-02SHANDONG RANXI PACKAGING CO LTD
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Patent Information

Application Number
CN202511627163.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-07
Publication Date
2026-01-02
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing plastic woven bag recycling technologies cannot effectively separate the warp and weft structures, resulting in low-quality recycled materials, high energy consumption, and difficulty in high-value utilization. Traditional methods also pose risks of noise pollution and secondary pollution.

Method used

An adjustable surface hooking mechanism is used to cut and separate the plastic woven bags. The unfolding drive mechanism and hooking components are used to process the longitudinal and transverse wire bundles of the plastic woven bags. Combined with cylinders and sliding adjustment grooves, sequential scraping and loosening are achieved.

Benefits of technology

It achieves effective loosening and separation of plastic woven bag wire bundles, facilitating secondary use, simplifying the processing procedure, reducing friction damage and material loosening, and improving recycling efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a recovery device for plastic woven bags, relates to the technical field of plastic woven bag recovery, and aims to solve the technical problem of low recovery and reuse value of traditional plastic woven bags. A driving guide rail is arranged at the upper end of the mounting vertical frame; a lifting mechanism is arranged at the movable end of the driving guide rail; an unfolding driving mechanism is arranged at the movable end of the lifting mechanism; and an adjustable area hooking mechanism is arranged at the bottom of the unfolding driving mechanism. On the basis of slitting the two adjacent sides of the plastic woven bag, the two sets of plastic wire harnesses which are longitudinally and transversely distributed and woven in the warp and weft direction of the plastic woven bag are subjected to loose treatment work, and the plastic woven bag obtained after slitting is woven and separated through the adjustable area hooking and connecting mechanism; by means of the mode, the plastic woven bag woven wire harness is recycled, meanwhile, secondary utilization for machining is facilitated, and compared with a conventional powder cutting machining procedure, the treatment process is simplified.
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Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic woven bag recycling, more particularly, to a plastic woven bag recycling device. BACKGROUND

[0002] The existing plastic woven bag recycling technology mainly adopts the following technical routes:

[0003] 1. Mechanical pulverization method: the whole bag is broken into small particles by a pulverizer, this method cannot separate the warp and weft structure, the quality of the recycled material is low, the energy consumption is high, and the noise pollution is serious;

[0004] 2. Melt granulation method: the woven bag is heated and melted to be granulated again, this method causes the material performance to decrease due to high temperature, and cannot remove impurities and mixed materials of different materials;

[0005] 3. Chemical dissolution method: using a solvent to dissolve specific components, this method has high cost, secondary pollution risk, complex processing process, and is difficult to be applied on a large scale;

[0006] Plastic woven bags, as a widely used packaging material, are widely used in agriculture, chemical industry, construction and other fields. According to industry statistics, the number of plastic woven bags consumed worldwide each year is as high as tens of billions, and China, as a major producer and user of plastic woven bags, accounts for more than 60% of the global total. However, the large-scale use of plastic woven bags has also brought serious environmental problems:

[0007] 1. Low recycling rate: the traditional plastic woven bag recycling rate is less than 30%, and a large number of waste woven bags enter landfills or the natural environment;

[0008] 2. Outdated processing technology: the existing recycling technology mainly adopts simple pulverization and granulation methods, which cannot effectively separate the warp and weft structure;

[0009] 3. Resource waste: the quality of plastic woven bags that are not effectively sorted is seriously degraded during the recycling process, making it difficult to achieve high-value utilization, therefore, the present application provides a plastic woven bag recycling device. SUMMARY

[0010] The present application aims to provide a plastic woven bag recycling device to solve the technical problem of low reuse value of traditional plastic woven bag recycling.

[0011] In order to solve the above technical problems, the present application provides the following technical scheme: a recycling device for plastic woven bags, comprising a mounting stand; the upper end of the mounting stand is provided with a driving guide rail; the movable end of the driving guide rail is provided with a lifting mechanism; the movable end of the lifting mechanism is provided with an unfolding driving mechanism; the bottom of the unfolding driving mechanism is provided with an adjustable surface area hooking mechanism; the adjustable surface area hooking mechanism comprises a fixed component arranged on the bottom of the unfolding driving mechanism; the adjustable surface area hooking mechanism further comprises an adjusting component arranged on the movable end of the unfolding driving mechanism; wherein the adjustable surface area hooking mechanism further comprises a hooking component arranged outside the fixed component and the adjusting component; wherein the lower part of the unfolding driving mechanism is provided with a positioning conveyor; the positioning conveyor is provided with a clamp for clamping the cut plastic woven bags.

[0012] The present application is based on the cutting of the adjacent two sides of the plastic woven bag, so as to realize the loose processing of the two groups of plastic thread bundles distributed longitudinally and transversely by weft and warp weaving, and the cut plastic woven bags are separated by the adjustable surface area hooking mechanism, so as to realize the recycling of the woven thread bundles of the plastic woven bags, and the method is convenient for secondary utilization and processing, and the processing flow is simplified compared with the conventional powder cutting process.

[0013] Preferably, the unfolding driving mechanism comprises a connecting seat fixed to the movable end of the lifting mechanism; a cylinder is fixedly arranged on the connecting seat; and the movable end of the cylinder is connected with the adjusting component.

[0014] Preferably, the fixed component comprises a main body connecting frame fixed to the connecting seat; two sliding adjusting grooves are respectively arranged on the two sides of the main body connecting frame; a limiting shaft A is arranged on the end of the main body connecting frame away from the adjusting component; a main drive shaft is arranged on the upper side of the main body connecting frame; wherein a limiting shaft B is further arranged on the side of the main body connecting frame away from the limiting shaft A; wherein a drive motor for driving the main drive shaft to rotate is arranged on one end of the main drive shaft; and the limiting shaft A, the main drive shaft and the limiting shaft B are in an obtuse angle triangle distribution.

[0015] Preferably, the adjusting component comprises a sliding seat; the sliding seat is arranged on the movable end of the cylinder; extension driven seats are respectively arranged on the two sides of the sliding seat; the extension driven seats are respectively provided with an adaptive shaft and a contact shaft; wherein the adaptive shaft and the contact shaft are respectively slidably arranged in the two sliding adjusting grooves.

[0016] Preferably, the hooking assembly comprises a connecting part A, a connecting part B, an adjusting part A, an adjusting part B and a contact part; the adjusting part A is located between the limiting wheel shaft B and the adapting wheel shaft; the adjusting part B is located between the adapting wheel shaft and the contact wheel shaft; the contact part is located between the contact wheel shaft and the limiting wheel shaft A; wherein the top of the contact part is provided with a magnetic plate relative to the position of the bottom of the main body connecting frame.

[0017] Preferably, the hooking assembly further comprises a plurality of chain belts; the chain belt comprises a plurality of head-to-tail connected link blocks A and link blocks B; the link blocks A and the link blocks B are connected by ball heads, and the ball head connection between the link blocks A and the link blocks B has a tolerance; the link block B is slidably provided with a hooking seat on both sides; the cross section of the hooking seat is L-shaped; wherein the hooking seat top and the magnetic plate are connected by magnetic repulsion.

[0018] Preferably, the clamp has a cavity with a ninety-degree included angle; forming a plastic woven bag edge clamping structure.

[0019] Preferably, the contact part is in contact with the cutting part of the oppositely inclined plastic woven bag, and the warp-knitted plastic woven bag is separated by rotating the hooking seat, so that the cutting part of the plastic woven bag forms a strip-shaped distribution structure.

[0020] A method for using a plastic woven bag recycling device, comprising the following steps:

[0021] S100, basic cutting: cutting the connected two sides of the plastic woven bag by artificial or mechanical device; then clamping the uncut end of the plastic woven bag by the clamp;

[0022] S200, feeding treatment: placing the clamped plastic woven bag on the positioning conveyor by artificial or mechanical device; wherein the positioning conveyor and the clamp are connected by snap connection;

[0023] S300, scraping treatment: conveying the clamp to the appropriate position by the positioning conveyor, then lowering the hooking assembly by the lifting mechanism to make the hooking seat of the contact part of the hooking assembly contact the plastic woven bag, then rotating the hooking assembly as a whole by driving the main drive shaft to rotate driven by the driving motor, to scrape the plastic woven bag, then driving the extending driven seat to drive the adapting wheel shaft and the contact wheel shaft to slide synchronously under the guidance of the two sliding adjusting grooves; the length of the adjusting part A is shortened, and the position of the contact part is stretched and lengthened, so that the area of the contact part is gradually increased, and the surface of the plastic woven bag is fully slid, like a comb combing tangled hair;

[0024] S400, secondary cutting, through artificial or mechanical device to the plastic woven bag where the two sides are not cut open, get the size of the woven line bundle.

[0025] Compared with the prior art, the beneficial effects of the present application are:

[0026] 1, the present application based on the adjacent two sides of the plastic woven bag cutting, and realize the processing work of two groups of plastic line bundle which are longitudinally and transversely distributed in the plastic woven bag, and the woven separation of the cut plastic woven bag is realized through the adjustable surface area hooking mechanism. Through this way, the recycled plastic woven bag weaving line bundle is realized, and the secondary utilization and processing are facilitated, and the processing flow is simplified compared with the conventional powder cutting process.

[0027] 2, the present application forms the sequential scraping work of the cut plastic woven bag through the cylinder stroke work, which scrapes the last end of the non-clamping end of the cut plastic woven bag, and then gradually scrapes the upper end, avoiding the direct scraping process from the uppermost end, which causes the friction of the multiple groups of warp and weft woven plastic woven bag line bundle, resulting in large scraping resistance and damage to the plastic woven bag.

[0028] 3, the present application is provided with two sliding adjustment grooves, which cooperate with the extension driven seat to drive the matching wheel shaft and the contact wheel shaft to slide synchronously, so that the synchronous stretching work is realized, the contact area is gradually increased during the sequential scraping work of the cut plastic woven bag, and good sequential scraping work is realized.

[0029] 4, the present application is based on the cylinder stroke work to drive the adjustment assembly to move, so that the length of the adjustment part A is shortened, and the contact part position is stretched and lengthened, so that the effect of increasing the area of the contact part is realized.

[0030] 5, the present application is provided with a hooking seat and a link block B, which provide a space for avoiding the movement interference of the hooking seat, and cooperate with the magnetic repulsion connection between the top of the hooking seat and the magnetic plate, so that the hooking seat at the contact position has good contact effect with the cutting position of the plastic woven bag under the action of gravity and magnetic repulsion force, and reduces the situation of unhooking or misplacement.

[0031] 6, the cavity with a ninety-degree angle is used to clamp the position of the plastic woven bag which is not cut, effectively reducing the loosening of the other two ends after cutting, and facilitating the collection in the later stage. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present application;

[0033] Figure 2It is the schematic diagram of the front view structure of the present application;

[0034] Figure 3 It is the schematic diagram of the three-dimensional structure of the adjustable face area hooking mechanism of the present application;

[0035] Figure 4 It is the schematic diagram of the three-dimensional structure of the chain belt of the present application; Figure 3 It is the schematic diagram of the local enlarged structure at A in the present application;

[0036] Figure 5 It is the schematic diagram of the internal side view structure of the adjustable face area hooking mechanism of the present application;

[0037] Figure 6 It is the schematic diagram of the three-dimensional structure of the chain belt of the present application;

[0038] Figure 7 It is the schematic diagram of the side cutting structure of the plastic woven bag of the present application;

[0039] Figure 8 It is the schematic diagram of the installation angle structure of the clamp and the plastic woven bag of the present application.

[0040] Explanation of the figure marks:

[0041] 1, installation stand; 2, driving guide rail; 3, lifting mechanism; 4, unfolding driving mechanism; 5, adjustable face area hooking mechanism; 6, fixed assembly; 7, adjusting assembly; 8, hooking assembly; 9, positioning conveyor; 10, clamp; 401, connecting seat; 402, air cylinder; 601, main body connecting frame; 602, sliding adjusting groove; 603, limiting wheel shaft A; 604, main driving wheel shaft; 605, limiting wheel shaft B; 608, magnetic plate; 701, sliding seat; 702, extension driven seat; 703, adaptive wheel shaft; 704, contact wheel shaft; 801, connecting part A; 802, connecting part B; 803, adjusting part A; 804, adjusting part B; 805, contact part; 807, link block A; 808, link block B; 809, hooking seat. DETAILED DESCRIPTION

[0042] As Figures 1 to 6The present application relates to a recycling device for plastic woven bags, which comprises a mounting stand 1, a driving guide rail 2 arranged at the upper end of the mounting stand 1, a lifting mechanism 3 arranged at the movable end of the driving guide rail 2, an unfolding driving mechanism 4 arranged at the movable end of the lifting mechanism 3, an adjustable surface hooking mechanism 5 arranged at the bottom of the unfolding driving mechanism 4, the adjustable surface hooking mechanism 5 comprising a fixed assembly 6 arranged at the bottom of the unfolding driving mechanism 4, the adjustable surface hooking mechanism 5 further comprising an adjusting assembly 7 arranged at the movable end of the unfolding driving mechanism 4, wherein the adjustable surface hooking mechanism 5 further comprises a hooking assembly 8 arranged outside the fixed assembly 6 and the adjusting assembly 7, wherein a positioning conveyor 9 is arranged below the unfolding driving mechanism 4, and a clamp 10 for clamping the cut plastic woven bags is arranged on the positioning conveyor 9.

[0043] In the embodiment of the present application, the unfolding driving mechanism 4 comprises a connecting seat 401 fixed to the movable end of the lifting mechanism 3, a cylinder 402 fixedly arranged on the connecting seat 401, and the movable end of the cylinder 402 being connected with the adjusting assembly 7. Figure 8 The present application can sequentially scrape the cut plastic woven bags by the return stroke of the cylinder 402, which can avoid the direct scraping from the uppermost end, the friction between the multiple groups of plastic woven bag threads, the large scraping resistance, and the damage to the plastic woven bags.

[0044] In the embodiment of the present application, the fixed assembly 6 comprises a main body connecting frame 601 fixed to the connecting seat 401, two sliding adjusting grooves 602 respectively arranged at the two sides of the main body connecting frame 601, a limiting wheel shaft A 603 arranged at the side of the main body connecting frame 601 away from the adjusting assembly 7, a main drive wheel shaft 604 arranged at the upper side of the main body connecting frame 601, a limiting wheel shaft B 605 arranged at the side of the main body connecting frame 601 away from the limiting wheel shaft A 603, a drive motor arranged at one end of the main drive wheel shaft 604 for driving the rotation of the main drive wheel shaft 604, and the limiting wheel shaft A 603, the main drive wheel shaft 604 and the limiting wheel shaft B 605 being arranged in an obtuse angle triangle.

[0045] In the embodiment of the present application, the adjusting assembly 7 comprises a sliding seat 701; the sliding seat 701 is arranged at the movable end of the air cylinder 402; the two sides of the sliding seat 701 are respectively provided with an extension driven seat 702; the end of the extension driven seat 702 is respectively provided with an adaptive wheel shaft 703 and a contact wheel shaft 704; wherein, the adaptive wheel shaft 703 and the contact wheel shaft 704 are respectively arranged in two sliding adjusting grooves 602. The present application is provided with two sliding adjusting grooves 602, which cooperate with the extension driven seat 702 to drive the adaptive wheel shaft 703 and the contact wheel shaft 704 to synchronously slide, so as to realize synchronous stretching work, gradually increase the contact area during the sequential scraping work of the cut plastic woven bag, and realize good sequential scraping work.

[0046] In the embodiment of the present application, the hooking assembly 8 comprises a connecting part A 801, a connecting part B 802, an adjusting part A 803, an adjusting part B 804 and a contact part 805; the adjusting part A 803 is located between the limiting wheel shaft B 605 and the adaptive wheel shaft 703; the adjusting part B 804 is located between the adaptive wheel shaft 703 and the contact wheel shaft 704; the contact part 805 is located between the contact wheel shaft 704 and the limiting wheel shaft A 603; wherein, the top of the contact part 805 is provided with a magnetic plate 608 relative to the bottom position of the main body connecting frame 601. The present application drives the adjusting assembly 7 to expand based on the stroke work of the air cylinder 402, so as to shorten the length of the adjusting part A 803, and simultaneously stretch and lengthen the position of the contact part 805, so as to realize the effect of increasing the area of the contact part 805.

[0047] In the embodiment of the present application, the hooking assembly 8 further comprises a plurality of chain belts; the chain belt comprises a plurality of link blocks A 807 and link blocks B 808 connected in a head-to-tail manner; the link blocks A 807 and the link blocks B 808 are connected by balls, and the ball connection between the link blocks A 807 and the link blocks B 808 has a tolerance; the two sides of the link block B 808 are slidably provided with a hooking seat 809; the cross section of the hooking seat 809 is L-shaped; wherein, the top of the hooking seat 809 is repulsively connected with the magnetic plate 608. The present application provides a space for avoiding interference by the hooking seat 809 and the link block B 808 through the sliding cooperation therebetween when the adaptive wheel shaft 703 passes, reduces the motion interference caused by the hooking seat 809, and simultaneously cooperates with the repulsive connection between the top of the hooking seat 809 and the magnetic plate 608 to generate a good contact effect with the cutting position of the plastic woven bag under the action of gravity and magnetic repulsion on the hooking seat 809 located at the position of the contact part 805, so as to reduce the situation of unhooking or mispositioning.

[0048] In the embodiment of the present application, the clamp 10 has a ninety-degree angle cavity; which forms an edge clamping structure for the plastic woven bag. The ninety-degree angle cavity is used to clamp the position of the plastic woven bag which is not cut, effectively reduces the loosening situation after cutting the other two ends, and is convenient for collection in the later stage.

[0049] In the embodiment of the present application, the contact part 805 is in contact with the relatively inclined plastic woven bag cutting part, the plastic woven bag is separated by rotating the hook connecting seat 809, and the plastic woven bag cutting part forms a strip distribution structure.

[0050] Working principle: the embodiment provides a plastic woven bag recycling device, and the use steps are as follows:

[0051] S100, basic cutting: the two connected sides of the plastic woven bag are cut by manual or mechanical device, then the uncut end of the plastic woven bag is clamped by the clamp 10;

[0052] S200, feeding treatment: the clamped plastic woven bag is placed on the positioning conveyor 9 by manual or mechanical device; wherein the positioning conveyor 9 is connected with the clamp 10 by snap connection, like the snap connection between the shopping cart and the escalator home;

[0053] S300, scraping treatment: the clamp 10 is conveyed to the appropriate position by the positioning conveyor 9, then the hook connecting assembly 8 is rotated by the lifting mechanism 3 to make the hook connecting seat 809 of the contact part 805 in contact with the plastic woven bag, then the main drive shaft 604 is driven to rotate by the driving motor to make the hook connecting assembly 8 rotate as a whole, so as to scrape the plastic woven bag, then the extension driven seat 702 drives the adaptive shaft 703 and the contact shaft 704 to slide synchronously by the driving of the cylinder 402 and the return stroke work, so that the length of the adjusting part A 803 is shortened, and the position of the contact part 805 is stretched and lengthened, so that the area of the contact part 805 is gradually increased, and the surface of the plastic woven bag is fully slid, like a comb combing the messy hair;

[0054] S400, secondary cutting: the two uncut sides of the plastic woven bag are cut by manual or mechanical device, and the woven wire bundle of the required size is obtained.

[0055] The embodiment of the present application discloses the preferred embodiment, but is not limited thereto, and those skilled in the art can easily understand the spirit of the present application according to the above-mentioned embodiment, and make different inferences and changes, as long as they do not deviate from the spirit of the present application, they are within the protection scope of the present application.

Claims

1. A recycling device for plastic woven bags, characterized in that, It includes a mounting frame (1); the upper end of the mounting frame (1) is provided with a drive rail (2); the movable end of the drive rail (2) is provided with a lifting mechanism (3); the movable end of the lifting mechanism (3) is provided with an unfolding drive mechanism (4). An adjustable surface hooking mechanism (5) is provided at the bottom of the unfolding drive mechanism (4). The adjustable surface area hooking mechanism (5) includes a fixing component (6) fixedly arranged at the bottom of the unfolding drive mechanism (4); the adjustable surface area hooking mechanism (5) also includes an adjusting component (7) fixedly arranged at the movable end of the unfolding drive mechanism (4). The adjustable surface hooking mechanism (5) further includes a hooking component (8) that is arranged around the outside of the fixing component (6) and the adjusting component (7). A positioning conveyor (9) is provided below the unfolding drive mechanism (4). The positioning conveyor (9) is equipped with a clamp (10) for holding the cut plastic woven bags.

2. The recycling device for plastic woven bags according to claim 1, characterized in that, The unfolding drive mechanism (4) includes a connecting seat (401) fixed to the movable end of the lifting mechanism (3); a cylinder (402) is fixedly installed on the connecting seat (401); the movable end of the cylinder (402) is connected to the adjusting component (7).

3. A recycling device for plastic woven bags according to claim 2, characterized in that, The fixing component (6) includes a main connecting frame (601) fixed to the connecting seat (401); two sliding adjustment slots (602) are respectively opened on both sides of the main connecting frame (601); a limiting wheel axle A (603) is provided at the end of the main connecting frame (601) that is relatively away from the adjusting component (7); a main drive wheel axle (604) is provided on the upper side of the main connecting frame (601); wherein, a limiting wheel axle B (605) is also provided on the side of the main connecting frame (601) that is relatively away from the limiting wheel axle A (603). The main drive wheel shaft (604) is provided with a drive motor at one end for driving the main drive wheel shaft (604) to rotate; The limiting wheel axle A (603), the main drive wheel axle (604), and the limiting wheel axle B (605) are arranged in an obtuse triangle.

4. A recycling device for plastic woven bags according to claim 3, characterized in that, The adjustment assembly (7) includes a sliding seat (701); the sliding seat (701) is arranged at the movable end of the cylinder (402); The sliding seat (701) is provided with an extension driven seat (702) on both sides; the extension driven seat (702) has an adapter wheel axle (703) and a contact wheel axle (704) at its end; wherein the adapter wheel axle (703) and the contact wheel axle (704) are slidably arranged in the two sliding adjustment grooves (602).

5. A recycling device for plastic woven bags according to claim 4, characterized in that, The hook assembly (8) includes a connecting part A (801), a connecting part B (802), an adjusting part A (803), an adjusting part B (804), and a contact part (805). The adjustment part A (803) is located between the limiting wheel axle B (605) and the adapter wheel axle (703); The adjustment part B (804) is located between the adapter wheel axle (703) and the contact wheel axle (704); The contact portion (805) is located between the contact wheel shaft (704) and the limiting wheel shaft A (603); A magnetic plate (608) is provided on the top of the contact part (805) relative to the bottom of the main body connecting frame (601).

6. A recycling device for plastic woven bags according to claim 5, characterized in that, The hook assembly (8) further includes several chain belts; the chain belts include several connecting blocks A (807) and B (808) connected end to end; the connecting blocks A (807) and B (808) are ball-head connected, and there is a tolerance between the ball-head connections of the connecting blocks A (807) and B (808); The connecting block B (808) is slidably provided with hook seats (809) on both sides; the cross-section of the hook seat (809) is L-shaped; The top of the hook seat (809) and the magnetic plate (608) are connected by magnetic repulsion.

7. A recycling device for plastic woven bags according to claim 6, characterized in that, The clamp (10) has a cavity at a 90-degree angle, forming a clamping structure for the plastic woven bag along its edge.

8. A recycling device for plastic woven bags according to claim 7, characterized in that, The contact part (805) contacts the relatively inclined plastic woven bag cutting part, and the warp and weft woven plastic woven bag is separated by the rotating hook seat (809), so that the plastic woven bag cutting part forms a strip distribution structure.

9. The method of using the recycling device for plastic woven bags according to claim 8, characterized in that, Includes the following steps: S100, Basic cutting: The plastic woven bag is cut on both connected sides by manual or mechanical means; then the uncut end of the plastic woven bag is clamped by clamp (10); S200, feeding process: The clamped plastic woven bag is placed on the positioning conveyor (9) by manual or mechanical means; wherein the positioning conveyor (9) and the clamp (10) are connected by a snap-fit ​​connection; S300, Scraping treatment: The clamp (10) is transported to a suitable position by the positioning conveyor (9), and then the lifting mechanism (3) lowers it so that the hook seat (809) of the contact part (805) in the hook assembly (8) contacts the plastic woven bag. Then the drive motor drives the main drive wheel shaft (604) to rotate, causing the hook assembly (8) to rotate as a whole, so as to scrape the plastic woven bag. Then, the cylinder (402) drives the return stroke, and under the guide limit of the two sliding adjustment grooves (602), the extended driven seat (702) drives the adapter wheel shaft (703) and the contact wheel shaft (704) to slide synchronously. This causes the length of the adjustment part A (803) to be shortened, and at the same time, it is stretched and extended relative to the position of the contact part (805). In this way, the area of ​​the contact part (805) is gradually increased, so as to fully slide the surface of the plastic woven bag. S400, two-stage slitting, involves manually or mechanically cutting the unslit sides of a plastic woven bag to obtain woven bundles of the required size.