Leftover material crushing and recycling equipment for PVC calendering film

Abstract

The invention discloses leftover material crushing and recycling equipment for PVC calendering films. The leftover material crushing and recycling equipment comprises a shell, and a supporting frame is mounted at the lower end of the shell; the crushing mechanism comprises a treatment groove formed in the upper end of the shell, a blanking groove is formed in the lower end of the shell, the treatment groove communicates with the blanking groove through two rectangular openings, and a crushing roller is rotationally connected between the front inner wall and the rear inner wall of each rectangular opening; a plurality of dragging grooves matched with the crushing rollers are formed in the inner walls of the two sides of the two rectangular openings, the rear ends of rotating shafts of the two crushing rollers extend to the outside and are provided with transmission gears, and the two transmission gears are meshed; and the driving mechanism is used for driving the crushing mechanism to operate. When the equipment is used, the situation that a film is accumulated at the position between the two rollers can be effectively avoided aiming at the double-roller crusher, in addition, the crushing rollers can be cooled, and crushing is prevented from being influenced.

Description

Technical Field

[0001] This invention relates to the field of PVC calendered film processing, and more particularly to a PVC calendered film scrap crushing and recycling equipment. Background Technology

[0002] The production and processing of PVC calendered film generates a large amount of scrap material. If this scrap material is not recycled and reused, it will not only cause a serious waste of resources, but also increase production costs.

[0003] Currently, double-roll mills are widely used in the market for crushing and recycling PVC calendered film scraps. However, existing double-roll mills have many problems in actual use. On the one hand, during the crushing operation, due to their flexibility, PVC calendered film scraps are easily pulled together by both rollers and accumulate between them. This accumulation not only increases the operating resistance of the equipment, increases energy consumption, and reduces crushing efficiency, but may also cause equipment failure, affect the normal operation of the equipment, and even shorten the service life of the equipment.

[0004] On the other hand, during prolonged crushing operations, the crushing rollers generate a significant amount of heat due to repeated friction with the PVC calendered film scraps. As the temperature rises, the physical properties of the PVC material change, making it more difficult to crush, thus affecting the crushing effect and quality. Moreover, excessively high temperatures may cause adverse reactions such as thermal degradation of the PVC material, producing harmful substances that not only affect the quality and performance of the recycled material but may also pose a health hazard to the operators. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a PVC calendered film scrap crushing and recycling device. When using this device with a double roller crusher, it can effectively prevent the film from accumulating between the two rollers. In addition, it can also cool down the crushing rollers to avoid affecting the crushing process.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A PVC calendered film scrap crushing and recycling device includes a housing with a support frame installed at the lower end of the housing; a crushing mechanism including a processing groove at the upper end of the housing and a discharge groove at the lower end of the housing, the processing groove and the discharge groove being connected through two rectangular openings, a crushing roller being rotatably connected between the front and rear inner walls of each rectangular opening, multiple traction grooves cooperating with the crushing rollers being provided on the inner walls of both sides of the two rectangular openings, the rear ends of the rotating shafts of the two crushing rollers extending to the outside and equipped with transmission gears, the two transmission gears meshing; a drive mechanism for driving the crushing mechanism; and a cutting mechanism to prevent film from accumulating between the two rollers.

[0007] Preferably, the drive mechanism includes a mounting bracket fixedly connected to the front side of the housing, on which a drive motor is mounted. The output shaft of the drive motor extends into one of the rectangular openings and is fixedly connected to the front end of the rotating shaft of one of the crushing rollers.

[0008] Preferably, the cutting mechanism includes a U-shaped strip fixedly connected to the upper end of the housing, a rectangular plate fixedly connected to the inner top of the U-shaped strip, a rectangular groove opened at the lower end of the rectangular plate, a cutting blade that can slide up and down is provided in the rectangular groove, and the upper end of the cutting blade is elastically connected to the inner top of the rectangular groove through multiple second springs.

[0009] Preferably, an electromagnet is fixedly connected to the upper end of the U-shaped strip, and two magnetic strips are symmetrically fixedly connected to the upper end of the cutting blade. When the electromagnet is energized, the adjacent surfaces of the two magnetic strips repel each other due to their similar polarity.

[0010] Preferably, it further includes an intermittent gas supply mechanism, which includes a mounting plate fixedly connected to the right side of the housing. A rotating shaft is arranged through the front and rear of the mounting plate. The front end of the rotating shaft is connected to a drive motor through a synchronizing element. A drive disk is fixedly connected to the rear end of the rotating shaft. A piston cylinder is fixedly connected to the right side of the housing. A first piston plate that can slide left and right is provided inside the piston cylinder. The right side of the first piston plate is connected to the eccentric part of the drive disk through a drive rod.

[0011] Preferably, the synchronizing element includes two synchronizing pulleys, which are connected by a synchronous belt drive.

[0012] Preferably, an air accumulator is fixedly connected to the right side of the housing. A second piston plate that can slide up and down is provided inside the air accumulator. The lower end of the second piston plate is elastically connected to the inner bottom of the air accumulator through a first spring. A pressure relief hole is provided at the inner top of the air accumulator. A mounting base is installed at the inner top of the air accumulator. A touch delay switch is installed at the lower end of the mounting base. The touch delay switch is electrically connected to an electromagnet. The left side space of the piston cylinder is connected to the outside through a one-way port. The left side space of the piston cylinder is connected to the bottom space of the air accumulator through a one-way pipe. The inner bottom space of the air accumulator is connected to the top space of the rectangular groove through a connecting pipe. A connecting groove is opened at the upper end of the cutting blade. Multiple air holes are opened at the bottom of the connecting groove.

[0013] Preferably, both the one-way port and the one-way pipe are equipped with one-way valves. The flow direction of the one-way valve inside the one-way port is one-way from the outside into the space on the left side of the piston cylinder, and the flow direction of the one-way valve inside the one-way pipe is one-way from the space on the left side of the piston cylinder into the gas storage cylinder.

[0014] Compared with the prior art, the beneficial effects of this invention are as follows: 1. The cutting mechanism can promptly cut the film accumulated between the two rollers, preventing material accumulation from affecting the crushing effect, ensuring the continuous and stable operation of the equipment, and further improving crushing efficiency and crushing quality.

[0015] 2. The intermittent gas supply mechanism, combined with the touch delay switch, can automatically control the energizing time of the electromagnet, thereby controlling the action time of the cutting blade, avoiding frequent or untimely cutting, and achieving automated control to reduce manual intervention.

[0016] 3. During the cutting operation, open the connecting pipe and use the gas in the air storage cylinder to discharge through the connecting groove and air hole on the cutting blade to cool down the rotating crushing roller. This effectively prevents the crushing roller from overheating due to prolonged operation and affecting the crushing operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a PVC calendered film scrap crushing and recycling equipment proposed in this invention; Figure 2 for Figure 1 Enlarged view of point A; Figure 3 for Figure 1 Rear view diagram; Figure 4 for Figure 1 Front and rear cross-sectional view; Figure 5 Diagram showing the connection between the cutting blade and the second spring; Figure 6 for Figure 1 A cross-sectional view in the left and right directions.

[0018] In the diagram: 1. Housing, 2. Support frame, 3. Processing groove, 4. U-shaped strip, 5. Electromagnet, 6. Mounting bracket, 7. Drive motor, 8. Synchronous pulley, 9. Synchronous belt, 10. Air accumulator, 11. One-way pipe, 12. Connecting pipe, 13. Mounting plate, 14. Piston cylinder, 15. One-way port, 16. First spring, 17. Rotating shaft, 18. Drive disc, 19. Drive rod, 20. Transmission gear, 21. Rectangular plate, 22. Crushing roller, 23. Rectangular opening, 24. Discharge chute, 25. Traction chute, 26. First piston plate, 27. Rectangular groove, 28. Cutting knife, 29. Second spring, 30. Magnetic strip, 31. Connecting groove, 32. Air hole, 33. Mounting base, 34. Second piston plate. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0020] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0021] Reference Figures 1-6 A PVC calendered film scrap crushing and recycling equipment includes a shell 1, a support frame 2 installed at the lower end of the shell 1, the support frame 2 is made of high-strength steel and the bottom is provided with anti-slip rubber pads to ensure the equipment is stable and reliable during operation and reduce displacement caused by vibration. The system also includes a crushing mechanism, which includes a processing groove 3 on the upper end of the housing 1 and a material discharge groove 24 on the lower end of the housing 1. The processing groove 3 and the material discharge groove 24 are connected through two rectangular openings 23. A crushing roller 22 is rotatably connected between the front and rear inner walls of each rectangular opening 23. The surface of the crushing roller 22 is hardened, which has high wear resistance and can extend its service life. Multiple traction grooves 25 that cooperate with the crushing roller 22 are provided on the inner walls on both sides of the two rectangular openings 23. The rear ends of the rotating shafts of the two crushing rollers 22 extend to the outside and are equipped with transmission gears 20. The two transmission gears 20 mesh and drive the two crushing rollers 22 to ensure that they can rotate synchronously and stably relative to each other.

[0022] It also includes a drive mechanism for driving the crushing mechanism. The drive mechanism includes a mounting bracket 6 fixedly connected to the front side of the housing 1. A drive motor 7 is mounted on the mounting bracket 6. The output shaft of the drive motor 7 extends into one of the rectangular openings 23 and is fixedly connected to the front end of the rotating shaft of one of the crushing rollers 22.

[0023] The system also includes a cutting mechanism to prevent film from accumulating between the two rollers. The cutting mechanism includes a U-shaped strip 4 fixedly connected to the upper end of the housing 1. A rectangular plate 21 is fixedly connected to the inner top of the U-shaped strip 4. A rectangular groove 27 is opened at the lower end of the rectangular plate 21. A cutting blade 28 that can slide up and down is set in the rectangular groove 27. The cutting blade 28 is made of sharp alloy steel to ensure good cutting effect. The upper end of the cutting blade 28 is elastically connected to the inner top of the rectangular groove 27 through multiple second springs 29. An electromagnet 5 is fixedly connected to the upper end of the U-shaped strip 4. Two magnetic strips 30 are symmetrically fixedly connected to the upper end of the cutting blade 28. When the electromagnet 5 is energized, it repels the adjacent surfaces of the two magnetic strips 30. When the cutting blade 28 moves down, it can cut the film accumulated between the two rollers, so that the film will be pulled and crushed as the roller rotates.

[0024] The system also includes an intermittent gas supply mechanism, which includes a mounting plate 13 fixedly connected to the right side of the housing 1. A rotating shaft 17 is provided through the mounting plate 13 from front to back. The front end of the rotating shaft 17 is connected to the drive motor 7 through a synchronous component. The synchronous component includes two synchronous pulleys 8, which are connected by a synchronous belt 9. The rear end of the rotating shaft 17 is fixedly connected to a drive disc 18. A piston cylinder 14 is fixedly connected to the right side of the housing 1. The piston cylinder 14 is made of a material with good sealing performance to prevent gas leakage. A first piston plate 26 that can slide left and right is provided inside the piston cylinder 14. The right side of the first piston plate 26 is connected to the eccentric part of the drive disc 18 through a drive rod 19. The right side of the housing 1 is fixedly connected to an air accumulator 10. The air accumulator 10 is equipped with a second piston plate 34 that can slide up and down. The lower end of the second piston plate 34 is elastically connected to the inner bottom of the air accumulator 10 through a first spring 16. The inner top of the air accumulator 10 is provided with a pressure relief hole. The inner top of the air accumulator 10 is equipped with a mounting base 33. The lower end of the mounting base 33 is equipped with a touch delay switch. The touch delay switch is electrically connected to an electromagnet 5. The left side space of the piston cylinder 14 is connected to the outside through a one-way port 15. The left side space of the piston cylinder 14 is connected to the bottom space of the air accumulator 10 through a one-way pipe 11. One-way valves are installed inside both the one-way port 15 and the one-way pipe 11. The flow direction of the one-way valve inside the one-way port 15 is one-way from the outside into the left side space of the piston cylinder 14. The flow direction of the one-way valve inside the one-way pipe 11 is one-way from the left side space of the piston cylinder 14 into the air accumulator 10. The bottom space of the air accumulator 10 is connected to the top space of the rectangular groove 27 through the connecting pipe 12. In the uncut state, the rear side of the cutting blade 28 seals the connecting pipe 12. When the cutting operation is performed, the cutting blade 28 moves down, allowing the connecting pipe 12 to open and release the gas. The upper end of the cutting blade 28 is provided with a connecting groove 31, and the bottom of the connecting groove 31 is provided with multiple air holes 32. The gas discharged from the multiple air holes 32 can comprehensively cool the rotating crushing roller 22.

[0025] In this invention, the drive motor 7, mounted on the mounting frame 6, is activated. The output shaft of the drive motor 7 extends into one of the rectangular openings 23 and is fixedly connected to the front end of the rotating shaft of one of the crushing rollers 22, thereby driving the crushing roller 22 to rotate. Through the transmission gear 20, the two crushing rollers 22 can rotate synchronously and stably relative to each other. PVC calendered film scraps enter the equipment from the processing tank 3. When passing through the two rectangular openings 23, they are crushed under the action of the two relatively rotating crushing rollers 22. The crushed material is discharged from the discharge chute 24. Multiple traction grooves 25 opened on the inner walls of both sides of the two rectangular openings 23 cooperate with the crushing rollers 22 to assist in the crushing work.

[0026] During equipment operation, two synchronous pulleys 8 are connected by a synchronous belt 9, causing the shaft 17, which is connected to the drive motor 7 via synchronous components (synchronous pulleys 8 and synchronous belt 9), to rotate. The rotation of the shaft 17 drives the drive disc 18 to rotate. The eccentric part of the drive disc 18 is connected to the first piston plate 26, which can slide left and right inside the piston cylinder 14, via a drive rod 19. When the drive disc 18 rotates, it drives the first piston plate 26 to slide back and forth inside the piston cylinder 14 via the drive rod 19. When the first piston plate 26 slides to the right, the space on the left side of the piston cylinder 14 draws in gas from the outside through the one-way port 15. When the first piston plate 26 slides to the left, the gas in the space on the left side of the piston cylinder 14 enters the bottom space of the gas storage tank 10 through the one-way pipe 11. The one-way valve inside the one-way pipe 11 directs the gas from the left side of the piston cylinder 14 into the gas storage tank 10. As gas continues to enter, the second piston plate 34, which can slide up and down inside the gas storage tank 10, moves upward against the elastic force of the first spring 16. When the gas pressure in the gas accumulator 10 reaches the set value of the touch delay switch, the touch delay switch is triggered, which energizes the electromagnet 5 and performs a cutting operation. After the electromagnet 5 is energized, it repels the adjacent surfaces of the two magnetic strips 30 due to their similar polarity. Under the action of the repulsive force, it overcomes the elastic force of multiple second springs 29 and causes the cutting blade 28 to slide down along the rectangular groove 27. The downward-moving cutting blade 28 cuts the film accumulated between the two rollers. The cut film will be pulled and crushed as the roller rotates. Due to the action of the touch delay switch, the electromagnet 5 will be energized for a period of time and then de-energized, and reset under the elastic action of the second spring 29. In the uncut state, the rear side of the cutting blade 28 seals the connecting pipe 12; when the cutting operation is performed, the cutting blade 28 moves down, opening the connecting pipe 12, the first spring 16 in the air storage cylinder 10 resets, and the second piston plate 34 moves down, forcing the gas in the bottom space of the air storage cylinder 10 into the top space of the rectangular groove 27 through the connecting pipe 12, and then discharged through the connecting groove 31 opened at the upper end of the cutting blade 28 and the multiple air holes 32 opened at the bottom, thus comprehensively cooling the rotating crushing roller 22.

[0027] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0028] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A PVC calendered film scrap crushing and recycling device, characterized in that, include: The housing (1) has a support frame (2) installed at its lower end. The crushing mechanism includes a processing groove (3) opened at the upper end of the housing (1), and a material discharge groove (24) opened at the lower end of the housing (1). The processing groove (3) and the material discharge groove (24) are connected through two rectangular openings (23). A crushing roller (22) is rotatably connected between the front and rear inner walls of each rectangular opening (23). Multiple traction grooves (25) that cooperate with the crushing roller (22) are opened on the inner walls on both sides of the two rectangular openings (23). The rear ends of the rotating shafts of the two crushing rollers (22) extend to the outside and are equipped with transmission gears (20). The two transmission gears (20) mesh. A drive mechanism is used to drive the crushing mechanism to operate; A cutting mechanism that prevents the film from accumulating between the two rollers.

2. The PVC calendering film scrap crushing and recycling equipment according to claim 1, characterized in that, The drive mechanism includes a mounting bracket (6) fixedly connected to the front side of the housing (1), on which a drive motor (7) is mounted. The output shaft of the drive motor (7) extends into one of the rectangular openings (23) and is fixedly connected to the front end of the rotating shaft of one of the crushing rollers (22).

3. The PVC calendering film scrap crushing and recycling equipment according to claim 1, characterized in that, The cutting mechanism includes a U-shaped strip (4) fixedly connected to the upper end of the housing (1). A rectangular plate (21) is fixedly connected to the inner top of the U-shaped strip (4). A rectangular groove (27) is opened at the lower end of the rectangular plate (21). A cutting blade (28) that can slide up and down is provided in the rectangular groove (27). The upper end of the cutting blade (28) is elastically connected to the inner top of the rectangular groove (27) through multiple second springs (29).

4. The PVC calendering film scrap crushing and recycling equipment according to claim 3, characterized in that, An electromagnet (5) is fixedly connected to the upper end of the U-shaped strip (4), and two magnetic strips (30) are symmetrically fixedly connected to the upper end of the cutting blade (28). When the electromagnet (5) is energized, it repels the adjacent surfaces of the two magnetic strips (30) due to their similar polarity.

5. The PVC calendering film scrap crushing and recycling equipment according to claim 4, characterized in that, It also includes an intermittent gas supply mechanism, which includes a mounting plate (13) fixedly connected to the right side of the housing (1). A rotating shaft (17) is provided through the mounting plate (13) from front to back. The front end of the rotating shaft (17) is connected to the drive motor (7) through a synchronous component. A drive disk (18) is fixedly connected to the rear end of the rotating shaft (17). A piston cylinder (14) is fixedly connected to the right side of the housing (1). A first piston plate (26) that can slide left and right is provided inside the piston cylinder (14). The right side of the first piston plate (26) is connected to the eccentric part of the drive disk (18) through a drive rod (19).

6. The PVC calendering film scrap crushing and recycling equipment according to claim 5, characterized in that, The synchronizing element includes two synchronizing pulleys (8), which are connected by a synchronizing belt (9).

7. The PVC calendering film scrap crushing and recycling equipment according to claim 5, characterized in that, An air accumulator (10) is fixedly connected to the right side of the housing (1). A second piston plate (34) that can slide up and down is provided inside the air accumulator (10). The lower end of the second piston plate (34) is elastically connected to the inner bottom of the air accumulator (10) through a first spring (16). A pressure relief hole is provided at the inner top of the air accumulator (10). A mounting base (33) is installed at the inner top of the air accumulator (10). A touch delay switch is installed at the lower end of the mounting base (33). Electrically connected to the electromagnet (5), the left side space of the piston cylinder (14) is connected to the outside through a one-way port (15), the left side space of the piston cylinder (14) is connected to the bottom space of the air storage cylinder (10) through a one-way pipe (11), the inner bottom space of the air storage cylinder (10) is connected to the top space of the rectangular groove (27) through a connecting pipe (12), the upper end of the cutting knife (28) is provided with a connecting groove (31), and the bottom of the connecting groove (31) is provided with multiple air holes (32).

8. The PVC calendering film scrap crushing and recycling equipment according to claim 7, characterized in that, One-way valves are installed inside both the one-way port (15) and the one-way pipe (11). The flow direction of the one-way valve inside the one-way port (15) is one-way to the outside and enters the space on the left side of the piston cylinder (14). The flow direction of the one-way valve inside the one-way pipe (11) is one-way to the space on the left side of the piston cylinder (14) and enters the gas storage cylinder (10).

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