Plastic granulating and cutting device with dust removal function

Abstract

The utility model relates to the technical field of plastic granulation cutting, and specifically discloses a plastic granulation cutting device with dust removal function, which comprises a bottom plate and a cutting box, the top of the bottom plate is provided with a cutting mechanism, an adjustable traction mechanism and a dust removal mechanism, the dust removal mechanism comprises a dust collection cover fixedly connected between the front and back sides of the inner wall of the cutting box, the outer wall of the dust collection cover is connected with a dust collection pipe penetrating through the cutting box, the upper end of the cutting box is provided with a collecting frame, and the upper side of the collecting frame is provided with a moving frame; the friction provided by the elastic rubber sleeve and the elasticity thereof can self-adaptively compress different specifications of plastic strips, realize stable conveying, effectively prevent traction skidding or plastic strip compression damage, and are simple, convenient and reliable to operate, the filtering screen plate is used for interception and sedimentation, the air after purification is discharged by the fan, the cutting dust and chippings can be effectively collected, the mixing of the cutting dust and chippings into finished products is avoided, the purity of the product is improved, and the harm to the health of the operator is reduced.

Description

Technical Field

[0001] This utility model relates to the field of plastic granulation and cutting technology, and specifically discloses a plastic granulation and cutting device with dust removal function. Background Technology

[0002] Plastic granulation is a crucial step in the plastic recycling and processing industry. Its core process involves continuous steps such as melt extrusion, cooling and shaping, traction conveying, and final cutting to produce uniformly sized, high-density granules from various plastic raw materials or recycled materials. These granules are ideal raw materials for subsequent injection molding, blow molding, and extrusion processes, and their quality directly affects the performance and quality of the final plastic products. Therefore, efficient, stable, and clean granulation equipment is essential for improving the overall efficiency of the plastic industry chain.

[0003] However, many existing granulation and cutting devices still have significant drawbacks. First, the high-speed rotating cutter generates a large amount of dust and debris when interacting with the plastic strip. Many devices lack effective dust removal structures, making it easy for this dust and debris to mix into the finished granules. This not only reduces product purity but also poses a health risk to workers due to the overflowing dust and debris. Second, in the traction stage, the spacing of the traction rollers often uses a fixed structure or a simple manual screw adjustment method. Fixed structures cannot accommodate plastic strips of different specifications, and manual screw adjustment is cumbersome. Furthermore, in actual production, the diameter of the extruded plastic strip often fluctuates and is not always stable. A traction mechanism lacking adaptive clamping capability is prone to problems such as traction slippage or damage to the plastic strip.

[0004] Therefore, a plastic granulation and cutting device with dust removal function is needed to solve the above problems. Utility Model Content

[0005] This invention proposes a plastic granulation and cutting device with dust removal function, which can effectively collect dust and debris generated during the cutting process, prevent them from mixing into the finished granules, thereby improving product purity and reducing the health hazards to operators; at the same time, the device can adapt to plastic strips of different specifications, is easy to operate, and has an adaptive clamping function, which can effectively prevent traction slippage or plastic strip damage.

[0006] This utility model is implemented as follows: a plastic granulation and cutting device with dust removal function includes a base plate and a cutting box. A cutting mechanism, an adjustable traction mechanism and a dust removal mechanism are arranged above the base plate. The dust removal mechanism includes a dust collection hood fixedly connected between the front and rear sides of the inner wall of the cutting box. The outer wall of the dust collection hood is connected to a dust collection pipe that penetrates the cutting box. A collection frame is placed at the upper end of the cutting box. A movable frame is provided on the upper side of the collection frame. A rectangular sealing ring that abuts against the upper edge of the collection frame is embedded in the lower edge of the movable frame. A horizontal pipe is connected to the outer wall of the movable frame. A metal corrugated pipe is connected between the horizontal pipe and the dust collection pipe. A circular shell is fixedly connected to the top inside the movable frame. A filter screen is fixedly connected inside the circular shell. A centrifugal fan with an air inlet connected to the circular shell is installed at the upper end of the movable frame. The dust removal mechanism also includes an auxiliary opening and closing mechanism. The adjustable traction mechanism includes an active traction roller rotatably connected inside the cutting box. A traction motor with its output end fixedly connected to the active traction roller is installed on the outer wall of the cutting box. A worm gear electric actuator is installed on the top of the cutting box. A connecting frame is fixedly connected to the output end of the worm gear electric actuator. Support seats are fixedly connected to both ends of the connecting frame. Through openings are provided on both the front and rear sides of the cutting box. A driven shaft passing through the two through openings is rotatably connected between the two support seats. An elastic rubber sleeve is provided on the outer wall of the driven shaft.

[0007] As a preferred embodiment of the present invention, a plastic granulation and cutting device with dust removal function includes a cutting mechanism comprising a rotating roller rotatably connected inside a cutting box, a plurality of roller cutters being provided on the outer wall of the rotating roller, a drive motor having its output end fixedly connected to the rotating roller being installed on the outer wall of the cutting box, a fixed blade being fixedly connected between the front and rear sides of the inner wall of the cutting box, and a transition strip with clearance fit to the outer wall of the active traction roller being fixedly connected to the left end of the fixed blade.

[0008] As a preferred embodiment of the present invention, a plastic granulation and cutting device with dust removal function includes an auxiliary opening and closing mechanism comprising a fixed plate fixedly connected to the right end of the cutting box, a lead screw rotatably connected to the upper end of the fixed plate, a drive plate fixedly connected to the moving frame being threadedly connected to the outer wall of the lead screw, two slide rods passing through the drive plate and slidably connected to the drive plate being fixedly connected to the upper end of the fixed plate, and a servo motor with a brake and an output end fixedly connected to the lead screw being installed at the lower end of the fixed plate.

[0009] As a preferred embodiment of the plastic granulation and cutting device with dust removal function of this utility model, the upper end of the cutting box is fixedly connected to a positioning frame located outside the collection frame.

[0010] As a preferred embodiment of the present invention, a plastic granulation and cutting device with dust removal function is provided, wherein an operation panel and a controller are installed on the outer wall of the cutting box.

[0011] As a preferred embodiment of the plastic granulation and cutting device with dust removal function of this utility model, the upper end of the cutting box is fixedly connected to two guide cylinders, and the interior of each of the two guide cylinders is slidably connected to a guide rod that is fixedly connected to the connecting frame.

[0012] As a preferred embodiment of the plastic granulation and cutting device with dust removal function of this utility model, the lower end of the cutting box is connected to a discharge port, and a guide block is fixedly connected inside the cutting box.

[0013] The beneficial effects of this utility model are: 1. In use, by activating the worm gear electric actuator, its output end pushes the connecting frame, support base, driven shaft, and surface elastic rubber sleeve downwards to a preset position, creating a suitable gap between the elastic rubber sleeve and the active traction roller. Multiple cooled and shaped plastic strips are fed into the cutting box, where the traction motor drives the active traction roller to rotate, guiding the plastic strips between the elastic rubber sleeve and the active traction roller. Utilizing the friction provided by the elastic rubber sleeve and its own elasticity, this structure can adaptively compress plastic strips of different specifications, achieving stable conveying, effectively preventing traction slippage or damage to the plastic strips, and offering simple and reliable operation.

[0014] 2. The plastic strip, steadily conveyed by traction, is cut into granules by the cutting mechanism. Simultaneously, the centrifugal fan starts, creating a negative pressure airflow in the suction channel, which consists of a dust hood, suction pipe, corrugated metal pipe, horizontal pipe, moving frame, and internal circular shell. Dust and debris generated during cutting are sucked into the dust hood and transported through pipes to the moving frame, where they are intercepted and settled by a filter screen, ultimately falling into the collection frame. The purified air is then discharged by the fan. This dust collection structure effectively collects cutting dust and debris, preventing them from mixing into the finished product, thereby improving product purity and reducing health hazards to operators. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0016] Figure 1 This is a front sectional view of the overall structure of a plastic granulation and cutting device with dust removal function according to this utility model. Figure 2 This is a partial left-side cross-sectional view of the present invention; Figure 3 This is a structural diagram of the positioning frame and the collection frame of this utility model; Figure 4 This is a partial right-side cross-sectional view of the present invention; Figure 5 This is a structural diagram of the cutting box and drive motor of this utility model.

[0017] The markings in the diagram are: 1. Base plate; 2. Cutting box; 3. Rotating roller; 4. Hob; 5. Fixed blade; 6. Drive motor; 7. Active traction roller; 8. Transition strip; 9. Through port; 10. Worm gear electric actuator; 11. Connecting frame; 12. Support base; 13. Driven shaft; 14. Elastic rubber sleeve; 15. Traction motor; 16. Dust hood; 17. Dust suction pipe; 18. Metal corrugated pipe; 19. Horizontal pipe; 20. Fixing plate; 21. Servo motor; 22. Lead screw; 23. Drive plate; 24. Moving frame; 25. Circular shell; 26. Centrifugal fan; 27. Positioning frame; 28. Collection frame. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0019] Please see Figure 1-5 A plastic granulation and cutting device with dust removal function includes a base plate 1 and a cutting box 2. A cutting mechanism, an adjustable traction mechanism and a dust removal mechanism are arranged above the base plate 1. The dust removal mechanism includes a dust collection hood 16 fixedly connected between the front and rear sides of the inner wall of the cutting box 2. The outer wall of the dust collection hood 16 is connected to a dust collection pipe 17 that penetrates the cutting box 2. A collection frame 28 is placed at the upper end of the cutting box 2. A movable frame 24 is provided on the upper side of the collection frame 28. A rectangular sealing ring that abuts against the upper edge of the collection frame 28 is embedded in the lower edge of the movable frame 24. A horizontal pipe 19 is connected to the outer wall of the movable frame 24. A metal corrugated pipe 18 is connected between the horizontal pipe 19 and the dust collection pipe 17. A circular shell 25 is fixedly connected to the top inside the movable frame 24. A filter screen is fixedly connected inside the circular shell 25. A centrifugal fan 26 with an air inlet connected to the circular shell 25 is installed at the upper end of the movable frame 24. The dust removal mechanism also includes an auxiliary opening and closing mechanism. The adjustable traction mechanism includes an active traction roller 7 rotatably connected inside the cutting box 2. A traction motor 15 with its output end fixedly connected to the active traction roller 7 is installed on the outer wall of the cutting box 2. A worm gear electric actuator 10 is installed on the top of the cutting box 2. A connecting frame 11 is fixedly connected to the output end of the worm gear electric actuator 10. Support seats 12 are fixedly connected to both ends of the connecting frame 11. Through openings 9 are provided on both the front and rear sides of the cutting box 2. A driven shaft 13 passing through the two through openings 9 is rotatably connected between the two support seats 12. An elastic rubber sleeve 14 is provided on the outer wall of the driven shaft 13.

[0020] In this embodiment: During use, the worm gear electric actuator 10 is activated. The output end of the worm gear electric actuator 10 pushes the connecting frame 11, the two support seats 12, the driven shaft 13, and the elastic rubber sleeve 14 downwards by a preset stroke, so that the elastic rubber sleeve 14 and the active traction roller 7 maintain a suitable distance according to the actual situation. After the multiple plastic strips to be cut are extruded and cooled and shaped externally, they are fed into the cutting box 2. The traction motor 15 drives the active traction roller 7 to rotate clockwise, passing the multiple plastic strips between the elastic rubber sleeve 14 and the active traction roller 7. Thus, through the interaction between the elastic rubber sleeve 14 and the active traction roller 7, the plastic strips can be conveyed to the right. The elastic rubber sleeve 14, which is wrapped around the driven shaft 13, provides sufficient friction while its material itself has a certain elasticity, thereby realizing the self-adaptive clamping function. After the above operation, it can adapt to plastic strips of different specifications, is easy to operate, has an adaptive clamping function, and can effectively prevent traction slippage or plastic strip damage.

[0021] The plastic strips, stably fed by the traction mechanism, are cut into granules by the cutting mechanism. During the cutting process, the centrifugal fan 26 operates, creating a negative pressure airflow within the suction channel, which consists of a circular shell 25, a moving frame 24, a horizontal pipe 19, a metal corrugated pipe 18, a suction pipe 17, and a suction hood 16. Under this negative pressure, the large amount of dust and debris generated during cutting is first captured by the suction hood 16, and then drawn into the moving frame 24 via the suction pipe 17, the metal corrugated pipe 18, and the horizontal pipe 19. When the dust-laden airflow passes through the filter plate inside the circular shell 25, the dust is intercepted and settles into the collection frame 28 below, while the purified air is discharged by the centrifugal fan 26. This effectively collects the dust and debris generated during the cutting process, preventing them from mixing into the finished granules, thereby improving product purity and reducing health hazards to operators.

[0022] When dust accumulates in the collection frame 28 to a certain extent and needs to be cleaned, the auxiliary opening and closing mechanism drives the moving frame 24 to rise, separating the rectangular sealing ring at its lower edge from the collection frame 28. At this time, the collection frame 28 can be removed from the positioning frame 27 for cleaning. After cleaning, it can be put back, and the reverse operation can restore the dust removal mechanism to its sealed working state. The whole process requires no tools and is simple and efficient.

[0023] As a technical optimization of this utility model, the cutting mechanism includes a rotating roller 3 rotatably connected inside the cutting box 2. The outer wall of the rotating roller 3 is provided with multiple roller cutters 4. The outer wall of the cutting box 2 is equipped with a drive motor 6 whose output end is fixedly connected to the rotating roller 3. A fixed blade 5 is fixedly connected between the front and rear sides of the inner wall of the cutting box 2. The left end of the fixed blade 5 is fixedly connected with a transition strip 8 that is clearance-fitted with the outer wall of the active traction roller 7.

[0024] In this embodiment: the plastic strip, stably fed by the traction mechanism, first passes through the transition strip 8, which has a clearance fit with the outer wall of the active traction roller 7 to ensure a smooth transition. Subsequently, the plastic strip enters the cutting area, where the drive motor 6 drives the rotating roller 3 and multiple roller cutters 4 on its outer wall to rotate counterclockwise at high speed. Together with the fixed cutter 5, the continuous plastic strip is cut into granules that meet the requirements.

[0025] As a technical optimization of this utility model, the auxiliary opening and closing mechanism includes a fixed plate 20 fixedly connected to the right end of the cutting box 2. A lead screw 22 is rotatably connected to the upper end of the fixed plate 20. A drive plate 23 fixedly connected to the moving frame 24 is threadedly connected to the outer wall of the lead screw 22. Two slide rods that pass through the drive plate 23 and are slidably connected to the drive plate 23 are fixedly connected to the upper end of the fixed plate 20. A servo motor 21 with a brake is installed at the lower end of the fixed plate 20 and whose output end is fixedly connected to the lead screw 22.

[0026] In this embodiment: the servo motor 21 is started, the lead screw 22 is driven to rotate, and the drive plate 23 and the moving frame 24 are moved. Since the slide bar passes through the drive plate 23 and slides with the drive plate 23, the lifting and lowering of the drive plate 23 is stable and without deviation.

[0027] As a technical optimization of this utility model, the upper end of the cutting box 2 is fixedly connected to a positioning frame 27 located outside the collection frame 28.

[0028] In this embodiment: the placement position of the collection box 28 is located by setting the positioning frame 27.

[0029] As a technical optimization of this utility model, the outer wall of the cutting box 2 is equipped with an operation panel and a controller.

[0030] In this embodiment: the outer wall of the cutting box 2 is equipped with an operation panel and a controller. The operation panel is used by the user to set the working parameters and issue commands. The controller receives the command signals from the operation panel and controls the traction motor 15, the worm gear electric actuator 10, the drive motor 6, the centrifugal fan 26 and the servo motor 21 with a brake accordingly.

[0031] As a technical optimization of this utility model, the upper end of the cutting box 2 is fixedly connected to two guide cylinders, and the interior of each guide cylinder is slidably connected to a guide rod that is fixedly connected to the connecting frame 11.

[0032] In this embodiment, since the two guide cylinders and the two guide rods are in sliding fit, the movement of the connecting frame 11 is stable and without deviation.

[0033] As a technical optimization of this utility model, the lower end of the cutting box 2 is connected to a discharge port, and a guide block is fixedly connected inside the cutting box 2.

[0034] In this embodiment: the qualified plastic granules after cutting are guided by the guide block inside the cutting box 2 and discharged through the discharge port at its lower end.

[0035] The working principle and usage process of this utility model are as follows: In use, the worm gear electric actuator 10 is activated. The output end of the worm gear electric actuator 10 pushes the connecting frame 11, two support seats 12, driven shaft 13, and elastic rubber sleeve 14 downwards by a preset stroke, ensuring that the elastic rubber sleeve 14 and the active traction roller 7 maintain a suitable distance according to actual conditions. Multiple plastic strips to be cut, after being extruded and cooled externally, are fed into the cutting box 2. The traction motor 15 drives the active traction roller 7 to rotate clockwise, inserting the multiple plastic strips between the elastic rubber sleeve 14 and the active traction roller 7. Through the interaction of the elastic rubber sleeve 14 and the active traction roller 7, the plastic strips can be conveyed to the right. The elastic rubber sleeve 14, wrapped around the driven shaft 13, provides sufficient friction while its material itself possesses a certain degree of elasticity, thus achieving an adaptive clamping function. Through the above operations, it can adapt to plastic strips of different specifications, is easy to operate, has an adaptive clamping function, and can effectively prevent traction slippage or plastic strip damage.

[0036] The plastic strip, stably fed by the traction mechanism, first passes through the transition strip 8, which has a clearance fit with the outer wall of the active traction roller 7 to ensure a smooth transition. Then, the plastic strip enters the cutting area, where the drive motor 6 drives the rotating roller 3 and multiple roller cutters 4 on its outer wall to rotate counterclockwise at high speed. Together with the fixed cutter 5, this cuts the continuous plastic strip into granules that meet the required specifications.

[0037] During the cutting process, the centrifugal fan 26 operates, creating a negative pressure airflow within the suction channel, which consists of a circular shell 25, a moving frame 24, a horizontal pipe 19, a metal corrugated pipe 18, a suction pipe 17, and a suction hood 16. Under this negative pressure, the large amount of dust and debris generated during cutting is first captured by the suction hood 16, and then drawn into the moving frame 24 via the suction pipe 17, the metal corrugated pipe 18, and the horizontal pipe 19. When the dust-laden airflow passes through the filter screen inside the circular shell 25, the dust is intercepted and settles into the collection frame 28 below, while the purified air is discharged by the centrifugal fan 26. This effectively collects the dust and debris generated during the cutting process, preventing them from mixing into the finished product particles, thereby improving product purity and reducing health hazards to operators. The finished, qualified plastic particles are guided by the guide block inside the cutting box 2 and discharged through the discharge port at its lower end.

[0038] When dust accumulates in the collection frame 28 to a certain extent and needs to be cleaned, the servo motor 21 is activated, driving the lead screw 22 to rotate, which in turn lifts the drive plate 23 and the moving frame 24, causing the rectangular sealing ring at its lower edge to separate from the collection frame 28. At this point, the collection frame 28 can be removed from the positioning frame 27 for cleaning. After cleaning, it can be put back in, and the reverse operation can restore the dust removal mechanism to its sealed working state. The entire process requires no tools and is simple and efficient.

[0039] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A plastic granulation and cutting device with dust removal function, comprising a base plate (1) and a cutting box (2), characterized in that: A cutting mechanism, an adjustable traction mechanism, and a dust removal mechanism are provided above the base plate (1); The dust removal mechanism includes a dust collection hood (16) fixedly connected between the front and rear sides of the inner wall of the cutting box (2). The outer wall of the dust collection hood (16) is connected to a dust collection pipe (17) that penetrates the cutting box (2). A collection frame (28) is placed at the upper end of the cutting box (2). A movable frame (24) is provided on the upper side of the collection frame (28). A rectangular sealing ring that abuts against the upper edge of the collection frame (28) is embedded at the lower edge of the movable frame (24). A horizontal pipe (19) is connected to the outer wall of the movable frame (24). A metal corrugated pipe (18) is connected between the horizontal pipe (19) and the dust collection pipe (17). A circular shell (25) is fixedly connected to the top inside the movable frame (24). A filter screen is fixedly connected inside the circular shell (25). A centrifugal fan (26) with an air inlet connected to the circular shell (25) is installed at the upper end of the movable frame (24). The dust removal mechanism also includes an auxiliary opening and closing mechanism. The adjustable traction mechanism includes an active traction roller (7) rotatably connected inside the cutting box (2). The outer wall of the cutting box (2) is equipped with a traction motor (15) whose output end is fixedly connected to the active traction roller (7). The top of the cutting box (2) is equipped with a worm gear electric actuator (10). The output end of the worm gear electric actuator (10) is fixedly connected to a connecting frame (11). Both ends of the connecting frame (11) are fixedly connected to support seats (12). The front and rear sides of the cutting box (2) are provided with through openings (9). A driven shaft (13) passing through the two through openings (9) is rotatably connected between the two support seats (12). The outer wall of the driven shaft (13) is provided with an elastic rubber sleeve (14).

2. The plastic granulation and cutting device with dust removal function according to claim 1, characterized in that: The cutting mechanism includes a rotating roller (3) rotatably connected inside the cutting box (2). The outer wall of the rotating roller (3) is provided with multiple roller cutters (4). The outer wall of the cutting box (2) is equipped with a drive motor (6) whose output end is fixedly connected to the rotating roller (3). A fixed blade (5) is fixedly connected between the front and rear sides of the inner wall of the cutting box (2). The left end of the fixed blade (5) is fixedly connected with a transition strip (8) that is clearance-fitted with the outer wall of the active traction roller (7).

3. The plastic granulation and cutting device with dust removal function according to claim 1, characterized in that: The auxiliary opening and closing mechanism includes a fixed plate (20) fixedly connected to the right end of the cutting box (2). A lead screw (22) is rotatably connected to the upper end of the fixed plate (20). A drive plate (23) fixedly connected to the moving frame (24) is threaded to the outer wall of the lead screw (22). Two slide rods are fixedly connected to the upper end of the fixed plate (20) and slidably connected to the drive plate (23). A servo motor (21) with a brake is installed at the lower end of the fixed plate (20) with its output end fixedly connected to the lead screw (22).

4. The plastic granulation and cutting device with dust removal function according to claim 1, characterized in that: The upper end of the cutting box (2) is fixedly connected to a positioning frame (27) located outside the collection frame (28).

5. A plastic granulation and cutting device with dust removal function according to claim 1, characterized in that: The outer wall of the cutting box (2) is equipped with an operation panel and a controller.

6. The plastic granulation and cutting device with dust removal function according to claim 1, characterized in that: The upper end of the cutting box (2) is fixedly connected to two guide cylinders, and the interior of each of the two guide cylinders is slidably connected to a guide rod that is fixedly connected to the connecting frame (11).

7. A plastic granulation and cutting device with dust removal function according to claim 1, characterized in that: The lower end of the cutting box (2) is connected to a discharge port, and a guide block is fixedly connected inside the cutting box (2).

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