Automatic adjusting mechanism for cutter gap of modified plastic strip cutting machine

Abstract

This invention relates to the field of plastic waste recycling technology, specifically to an automatic blade gap adjustment mechanism for a modified plastic strip pelletizer. The pelletizer includes a machine body, a fixed base at the top of the machine body, a cover plate connected to the top of the fixed base via a hinge, a pressure roller at the bottom of the cover plate, and a cutting roller and a support roller rotatably connected inside the fixed base. This invention uses a controller to precisely control the extension and retraction of an electric telescopic rod to match the required adjustment stroke of the cutting blade. Relying on the linkage structure of the wedge, counterweight crossbar, and turntable, and with the bidirectional limiting guidance of the first and second guide grooves, it can quickly drive the cutting blade to move smoothly, precisely adjust the working gap between the cutting blade and the cutting roller, effectively reducing manual operation errors and labor intensity, and is suitable for batch and routine pelletizing production.

Description

Technical Field

[0001] This invention relates to the field of plastic waste recycling technology, specifically to an automatic blade gap adjustment mechanism for a modified plastic strip pelletizer. Background Technology

[0002] In the field of modified plastic recycling and reprocessing, plastic strip pelletizers are core processing equipment, mainly used to cut continuously extruded modified plastic strips into uniform pellets. They are widely used in production scenarios such as waste plastic recycling and modified plastic granulation. The gap between the cutter and the cutting roller is a core parameter that determines the quality of plastic pellet forming. The gap accuracy directly affects the uniformity of pellet size, pelleting integrity, and product yield. Therefore, the adjustment accuracy and ease of the cutter gap are crucial to overall production efficiency.

[0003] Traditional plastic strip pelletizers mostly rely on manual adjustment of the cutter gap. Operators adjust the cutter position by manually turning adjusting bolts and adding or removing shims. This adjustment method is cumbersome, requires repeated calibration and multiple trial cuts, which is time-consuming and labor-intensive, greatly reducing the efficiency of equipment debugging and making it unsuitable for the needs of batch and continuous modified plastic production.

[0004] Therefore, an automatic adjustment mechanism for the cutter gap of a modified plastic strip pelletizer is proposed to solve the problems mentioned above. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an automatic blade gap adjustment mechanism for a modified plastic strip pelletizer. This mechanism solves the problem that traditional plastic strip pelletizers mostly rely on manual adjustment of the blade gap, which depends on operators manually turning adjusting bolts and adding or removing shims to adjust the blade position. This adjustment method is cumbersome, requires repeated calibration and multiple trial cuts, is time-consuming and labor-intensive, greatly reduces equipment debugging efficiency, and cannot meet the needs of batch and continuous modified plastic production.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automatic adjustment mechanism for the cutter gap of a modified plastic strip pelletizer, comprising a plastic strip pelletizer for recycling plastics, the plastic strip pelletizer comprising a machine body, a fixed seat being provided on the top of the machine body, a cover plate being connected to the top of the fixed seat via a hinge, a pressure roller being provided at the bottom of the cover plate, and a cutting roller and a support roller being rotatably connected inside the fixed seat; The inner cavity sidewall of the fixed base is provided with an adjustment mechanism. The adjustment mechanism includes a fixed frame fixedly connected inside the fixed base. The fixed frame has a rotating hole inside and a first guide groove on one side. A cutting blade is provided between the cutting roller and the idler roller. A slider is fixedly connected to the end of the cutting blade. A protruding rod is fixedly connected to the end of the slider. A turntable is provided outside the shaft of the idler roller. A second guide groove is provided outside the turntable. A counterweight crossbar is fixedly connected to one side of the turntable. An electric telescopic rod is fixed inside the fixed base. A wedge is fixed to the output end of the electric telescopic rod.

[0007] Preferably, there are two turntables connected by a counterweight crossbar. The two turntables are respectively located on the outer sides of both ends of the roller, and the inclined surface of the wedge block is in contact with the outer surface of the convex rod.

[0008] Preferably, the slider is slidably connected inside the first guide groove, and the protrusion is slidably connected inside the second guide groove.

[0009] Preferably, the fixed frame is connected to the cutting roller and the idler roller through a rotating hole, and the cutting roller and the idler roller are rotatably connected to the fixed frame.

[0010] Preferably, the turntable is rotatably connected to a fixed sleeve, which is sleeved on the outside of the roller shaft and fixedly connected to the inner cavity sidewall of the fixed seat.

[0011] Preferably, a locking mechanism is provided outside the shaft of the idler roller. The locking mechanism includes a threaded section, an annular groove, a spring, a threaded ring, a slide rod, a protrusion, an arc-shaped groove, a recess, and a baffle. The threaded section is located outside the shaft of the idler roller. The annular groove is located outside the shaft of the idler roller. The spring is sleeved outside the shaft of the idler roller. The threaded ring is threaded to the outside of the threaded section. The slide rod is fixedly connected to the outside of the threaded ring. The protrusion is fixedly connected to the end of the slide rod. The arc-shaped groove is located inside the turntable. The recess is located inside the arc-shaped groove. The baffle is fixedly connected to the side of the cover plate.

[0012] Preferably, one end of the spring is fixedly connected to the outer wall of the fixed base, the slide rod is slidably connected through the inside of the fixed base, and one end of the slide rod is slidably inserted into the arc-shaped groove.

[0013] Preferably, the protrusion is slidably inserted into the groove, the groove is equidistantly distributed inside the arc-shaped groove, and one side of the threaded ring is provided with an arc surface.

[0014] Preferably, one end of the shaft of the cutting roller is fixedly connected to a pulley, the other end of the shaft of the cutting roller is fixedly connected to a first gear, and one end of the shaft of the idler roller is fixedly connected to a second gear.

[0015] Preferably, the first gear and the second gear are meshed together, a motor is installed inside the machine body, the end of the motor is fixed with the pulley, the two pulleys are connected by a belt, and a controller is fixed on the top of the machine body.

[0016] Compared with the prior art, the present invention provides an automatic blade gap adjustment mechanism for a modified plastic strip pelletizer, which has the following beneficial effects: 1. The electric telescopic rod is precisely controlled by the controller to match the required adjustment stroke of the cutting blade. Relying on the linkage structure of the wedge, counterweight crossbar and turntable, and with the bidirectional limiting guidance of the first guide groove and the second guide groove, the cutting blade can be driven to move smoothly and quickly. The working gap between the cutting blade and the cutting roller can be precisely adjusted, effectively reducing manual operation error and labor intensity, and is suitable for batch and routine pelletizing production.

[0017] 2. Two sets of turntables are symmetrically set at both ends of the roller, and the two turntables rotate and lock synchronously through the counterweight crossbar. This can effectively avoid the problem of cutting blade tilting and offset caused by unilateral adjustment, so that the cutting blade maintains horizontal displacement throughout the process. The gap adjustment is uniform and symmetrical, which greatly improves the uniformity of plastic strip pellets and the quality of finished products. At the same time, the wedge block and the counterweight crossbar are always in inclined contact, which can achieve temporary fixation after adjustment, providing a basis for precise locking and further ensuring adjustment accuracy.

[0018] 3. The locking mechanism of the idler roller shaft can automatically unlock and lock the turntable by rotating the equipment in both forward and reverse directions. It automatically unlocks when the cutting roller and idler roller are reversed, which is convenient for gap adjustment. When rotating in the forward direction, it automatically locks the turntable to achieve precise positioning and stop the rotation of the cutting blade, ensuring the stability of long-term continuous pelletizing operation. At the same time, the equally spaced grooves can achieve precise locking of multiple gaps, adapting to the pelletizing needs of different specifications of plastic strips, making the equipment more versatile. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the fixed seat temporal part structure of the present invention; Figure 3 This is a schematic diagram of the fixing frame structure of the present invention; Figure 4 This is a schematic diagram of the wedge block structure of the present invention; Figure 5 This is a schematic diagram of the turntable structure of the present invention; Figure 6 This is a schematic diagram of the second guide groove structure of the present invention; Figure 7 This is a schematic diagram of the threaded ring structure of the present invention; Figure 8 For the present invention Figure 6 Enlarged structural diagram at point A in the middle.

[0020] In the diagram: 1. Machine body; 2. Fixed base; 3. Cover plate; 4. Pressure roller; 5. Controller; 6. Cutting roller; 7. Support roller; 8. Fixed frame; 9. Rotating hole; 10. First guide groove; 11. Cutting blade; 12. Slider; 13. Protruding rod; 14. Turntable; 15. Second guide groove; 16. Counterweight crossbar; 17. Fixed sleeve; 19. Threaded section; 20. Annular groove; 21. Spring; 22. Threaded ring; 23. Slide rod; 24. Protrusion; 25. Arc groove; 26. Groove; 27. Baffle; 28. Pulley; 29. ​​First gear; 30. Second gear; 31. Electric telescopic rod; 32. Wedge. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example: Please refer to Figure 1 - Figure 8 The automatic adjustment mechanism for the cutter gap of a modified plastic strip pelletizer in this embodiment includes a plastic strip pelletizer for recycling plastic. The plastic strip pelletizer includes a machine body 1, a fixed seat 2 is provided on the top of the machine body 1, a cover plate 3 is connected to the top of the fixed seat 2 by a hinge, a pressure roller 4 is provided at the bottom of the cover plate 3, and a cutting roller 6 and a support roller 7 are rotatably connected inside the fixed seat 2. An adjustment mechanism is provided on the inner cavity sidewall of the fixed base 2. The adjustment mechanism includes a fixed frame 8 fixedly connected inside the fixed base 2. The fixed frame 8 has a rotating hole 9 inside and a first guide groove 10 on one side. A cutting blade 11 is provided between the cutting roller 6 and the idler roller 7. A slider 12 is fixedly connected to the end of the cutting blade 11. A protruding rod 13 is fixedly connected to the end of the slider 12. A turntable 14 is provided outside the shaft of the idler roller 7. A second guide groove 15 is provided outside the turntable 14. A counterweight crossbar 16 is fixedly connected to one side of the turntable 14. An electric telescopic rod 31 is fixed inside the fixed base 2. A wedge block 32 is fixed to the output end of the electric telescopic rod 31. A fixed sleeve 17 is rotatably connected inside the turntable 14. The fixed sleeve 17 is sleeved outside the shaft of the idler roller 7 and is fixedly connected to the inner cavity sidewall of the fixed base 2.

[0023] When adjusting the cutter during use, open the cover plate 3 and control the electric telescopic rod 31 to extend to a fixed length via the controller 5. The extension length matches the stroke of the cutting blade 11 that needs to be adjusted. When the electric telescopic rod 31 is started, pull or push the wedge block 32 to slide. With the setting of the inclined plane, the counterweight crossbar 16 is moved. While the counterweight crossbar 16 is moving, the turntable 14 rotates outside the fixed sleeve 17. At this time, the second guide groove 15 of the turntable 14 is set in conjunction with the first guide groove 10 of the fixed frame 8, so that the slider 12 slides inside the first guide groove 10 and the protruding rod 13 slides inside the second guide groove 15, thereby adjusting the distance between the cutting blade 11 and the cutting roller 6.

[0024] When moving the wedge 32, the counterweight crossbar 16 is always in contact with the inclined surface of the wedge 32, which can achieve the effect of temporary fixation and facilitate subsequent locking and fixing. The rotation of turntable 14 enables rapid and automatic adjustment of the cutting blade 11, improving adjustment efficiency and making the entire adjustment process more convenient. The connection between the two turntables 14 via the counterweight crossbar 16 allows for the synchronous fixing of both turntables 14 when one turntable 14 is locked. The synchronous rotation of the two turntables 14 also prevents the cutting blade 11 from tilting. The rotating hole 9 provided on the fixed frame 8 enables the cutting roller 6 and the idler roller 7 to rotate normally. Moreover, the fixed frame 8 is connected to the cutting roller 6 and the idler roller 7, which can prevent the fixed frame 8 from twisting and deforming.

[0025] Furthermore, there are two turntables 14, which are connected by a counterweight crossbar 16. The two turntables 14 are respectively located on the outer sides of both ends of the idler roller 7. The inclined surface of the wedge block 32 is in contact with the outer surface of the protrusion rod 13. The slider 12 is slidably connected inside the first guide groove 10, and the protrusion rod 13 is slidably connected inside the second guide groove 15. The fixed frame 8 is connected to the cutting roller 6 and the idler roller 7 through the rotating hole 9. The cutting roller 6 and the idler roller 7 are rotatably connected to the fixed frame 8.

[0026] To ensure stable adjustment of the cutting blade 11, a locking mechanism is provided on the outside of the shaft of the idler roller 7. The locking mechanism includes a threaded section 19, an annular groove 20, a spring 21, a threaded ring 22, a slide bar 23, a protrusion 24, an arc-shaped groove 25, a recess 26, and a baffle 27. The threaded section 19 is located on the outside of the shaft of the idler roller 7, the annular groove 20 is located on the outside of the shaft of the idler roller 7, the spring 21 is sleeved on the outside of the shaft of the idler roller 7, the threaded ring 22 is threadedly connected to the outside of the threaded section 19, the slide bar 23 is fixedly connected to the outside of the threaded ring 22, the protrusion 24 is fixedly connected to the end of the slide bar 23, the arc-shaped groove 25 is located on the inside of the turntable 14, the recess 26 is located inside the arc-shaped groove 25, and the baffle 27 is fixedly connected to the side of the cover plate 3.

[0027] When the cutting blade 11 needs adjustment, the cutting roller 6 reverses, which drives the support roller 7 to reverse. When the support roller 7 reverses, the spring 21 pushes the threaded ring 22 back to contact the threaded section 19, thereby driving the threaded ring 22 to connect with the threaded section 19. This causes the slide rod 23 to slide out of the arc groove 25, thus unlocking the turntable 14. The turntable 14 can then be adjusted. After adjustment, the cutting roller 6 rotates forward, which drives the support roller 7 to rotate forward. The threaded ring 22 disengages from the threaded section 19. At this time, one end of the slide rod 23 slides into the arc groove 25, and the protrusion 24 is inserted into the corresponding groove 26, thereby achieving the effect of stopping and limiting the rotation of the turntable 14, ensuring the stability of the cutting blade 11 after adjustment. This achieves the unlocking and self-locking effect through the forward and reverse rotation of the equipment itself, improving the stability of the equipment. After locking and fixing the cutting blade 11, close the cover plate 3. The baffle 27 on the edge of the cover plate 3 is inserted into one side of the threaded ring 22 and slightly compresses the spring 21, so that the threaded ring 22 does not contact the rotating shaft of the roller 7, thereby achieving the effect of anti-wear. In addition, the arc surface set on one side of the threaded ring 22 can play a guiding role, avoiding interference during the contact of the baffle 27 and the threaded ring 22, further improving the convenience of using the equipment.

[0028] Furthermore, one end of the spring 21 is fixedly connected to the outer wall of the fixed base 2, the slide rod 23 is slidably connected through the inside of the fixed base 2, one end of the slide rod 23 is slidably inserted into the inside of the arc groove 25, the protrusion 24 is slidably inserted into the inside of the groove 26, the groove 26 is equidistantly distributed inside the arc groove 25, and one side of the threaded ring 22 is provided with an arc surface.

[0029] Furthermore, a pulley 28 is fixedly connected to one end of the shaft of the cutting roller 6, and a first gear 29 is fixedly connected to the other end of the shaft of the cutting roller 6. A second gear 30 is fixedly connected to one end of the shaft of the support roller 7. The first gear 29 and the second gear 30 are meshed together. A motor is installed inside the machine body 1. A pulley 28 is fixed to the end of the motor. The two pulleys 28 are connected by a belt. A controller 5 is fixed to the top of the machine body 1.

[0030] The modified plastic strip is located on the idler roller 7 and is conveyed by the idler roller 7, and is used in conjunction with the cutting roller 6 and the cutting knife 11 to perform pelletizing operation.

[0031] The working principle of the above embodiments is as follows: When the equipment is running, the modified plastic strips are placed on the surface of the roller 7, and the material is conveyed by the transmission structure. The cutting roller 6 and the cutting blade 11 work together to complete the plastic strip pelletizing operation.

[0032] The equipment uses a linkage transmission structure to provide power. The motor inside the machine body 1 drives the cutting roller 6 to rotate through the belt and pulley 28. At the same time, the first gear 29 at the end of the cutting roller 6 meshes with the second gear 30 at the end of the support roller 7 to drive the support roller 7 to rotate synchronously and realize stable material conveying. The cutting gap adjustment operation is completed by the adjustment mechanism in the cavity of the fixed seat 2. Before operation, the cover plate 3 can be opened, and the electric telescopic rod 31 can be precisely controlled to extend and retract through the controller 5 on the top of the machine body 1. Its extension and retraction length corresponds to the adjustment stroke of the cutting blade 11.

[0033] When the electric telescopic rod 31 is running, it pushes or pulls the wedge block 32 to slide. With the cooperation of the inclined surface of the wedge block 32 and the counterweight crossbar 16, the counterweight crossbar 16 drives the two sets of turntables 14 to rotate synchronously. The two turntables 14 are symmetrically arranged on the outer sides of both ends of the roller 7 and are rotatably connected to the roller 7 shaft through the fixed sleeve 17. This will not interfere with the normal operation of the roller 7. During the rotation of the turntable 14, its internal second guide groove 15 cooperates with the first guide groove 10 of the fixed frame 8 to limit the movement, causing the slider 12 to slide along the first guide groove 10 and the protrusion 13 to slide along the second guide groove 15. This drives the cutting blade 11 to move smoothly and accurately adjust the distance between the cutting blade 11 and the cutting roller 6.

[0034] The self-locking and unlocking are achieved by relying on the threaded section 19, spring 21, threaded ring 22 and other components on the rotating shaft of the idler roller 7. Before adjusting the gap, the control motor drives the cutting roller 6 and the idler roller 7 to reverse. The spring 21 rebounds and pushes the threaded ring 22 to engage with the threaded section 19, which drives the slide rod 23 and the protrusion 24 to disengage from the arc groove 25 and the groove 26 of the turntable 14, thus unlocking the turntable 14. Only then can the gap be adjusted. After the adjustment is completed, the equipment runs in the forward direction. The threaded ring 22 disengages from the threaded section 19, the end of the slide rod 23 is inserted into the arc groove 25, and the protrusion 24 is engaged in the corresponding groove 26, so as to stop the rotation of the turntable 14 and complete the self-locking fixation.

[0035] When the pelletizing operation is completed, the cover plate 3 is closed. The baffle 27 on its side can slightly compress the spring 21, so that the threaded ring 22 is separated from the shaft of the idler roller 7, avoiding long-term frictional wear. The arc surface on the side of the threaded ring 22 can avoid assembly interference, further improving the stability of equipment operation and service life.

[0036] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. As long as they can achieve their beneficial effects, they can be implemented. Therefore, this embodiment will not elaborate on their specific structural composition and working principle.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic blade gap adjustment mechanism for a modified plastic strip pelletizer, characterized in that: The invention includes a plastic strip pelletizer for recycling plastics. The plastic strip pelletizer includes a machine body (1), a fixed seat (2) is provided on the top of the machine body (1), a cover plate (3) is connected to the top of the fixed seat (2) by a hinge, a pressure roller (4) is provided at the bottom of the cover plate (3), and a cutting roller (6) and a support roller (7) are rotatably connected inside the fixed seat (2). The inner cavity sidewall of the fixed seat (2) is provided with an adjustment mechanism. The adjustment mechanism includes a fixed frame (8) fixedly connected inside the fixed seat (2). The fixed frame (8) has a rotating hole (9) inside. A first guide groove (10) is provided on one side of the fixed frame (8). A cutting blade (11) is provided between the cutting roller (6) and the idler roller (7). A slider (12) is fixedly connected to the end of the cutting blade (11). A protruding rod (13) is fixedly connected to the end of the slider (12). A turntable (14) is provided outside the shaft of the idler roller (7). A second guide groove (15) is provided outside the turntable (14). A counterweight crossbar (16) is fixedly connected to one side of the turntable (14). An electric telescopic rod (31) is fixed inside the fixed seat (2). A wedge (32) is fixed at the output end of the electric telescopic rod (31).

2. The automatic blade gap adjustment mechanism of the modified plastic strip pelletizer according to claim 1, characterized in that: Two turntables (14) are provided, and the two turntables (14) are connected by a counterweight crossbar (16). The two turntables (14) are respectively located on the outer sides of both ends of the roller (7). The inclined surface of the wedge (32) is in contact with the outer surface of the protruding rod (13).

3. The automatic blade gap adjustment mechanism of the modified plastic strip pelletizer according to claim 2, characterized in that: The slider (12) is slidably connected inside the first guide groove (10), and the protruding rod (13) is slidably connected inside the second guide groove (15).

4. The automatic blade gap adjustment mechanism of the modified plastic strip pelletizer according to claim 3, characterized in that: The fixed frame (8) is connected to the cutting roller (6) and the idler roller (7) through the rotating hole (9), and the cutting roller (6) and the idler roller (7) are rotatably connected to the fixed frame (8).

5. The automatic blade gap adjustment mechanism of a modified plastic strip pelletizer according to claim 1, characterized in that: The turntable (14) is rotatably connected to a fixed sleeve (17), which is sleeved on the outside of the shaft of the roller (7) and is fixedly connected to the inner cavity side wall of the fixed seat (2).

6. The automatic blade gap adjustment mechanism of the modified plastic strip pelletizer according to claim 1, characterized in that: The idler roller (7) is provided with a locking mechanism outside the shaft. The locking mechanism includes a threaded section (19), an annular groove (20), a spring (21), a threaded ring (22), a slide bar (23), a protrusion (24), an arc groove (25), a groove (26), and a baffle (27). The threaded section (19) is provided outside the shaft of the idler roller (7). The annular groove (20) is opened outside the shaft of the idler roller (7). The spring (21) is sleeved outside the shaft of the idler roller (7). The threaded ring (22) is threaded to the outside of the threaded section (19). The slide bar (23) is fixedly connected to the outside of the threaded ring (22). The protrusion (24) is fixedly connected to the end of the slide bar (23). The arc groove (25) is opened inside the turntable (14). The groove (26) is opened inside the arc groove (25). The baffle (27) is fixedly connected to the side of the cover plate (3).

7. The automatic blade gap adjustment mechanism of a modified plastic strip pelletizer according to claim 6, characterized in that: One end of the spring (21) is fixedly connected to the outer wall of the fixed seat (2), and the slide rod (23) is slidably connected through the inside of the fixed seat (2). One end of the slide rod (23) is slidably inserted into the inside of the arc groove (25).

8. The automatic blade gap adjustment mechanism of a modified plastic strip pelletizer according to claim 6, characterized in that: The protrusion (24) is slidably inserted into the groove (26), the groove (26) is equidistantly distributed inside the arc groove (25), and an arc surface is provided on one side of the threaded ring (22).

9. The automatic blade gap adjustment mechanism of a modified plastic strip pelletizer according to claim 1, characterized in that: One end of the shaft of the cutting roller (6) is fixedly connected to a pulley (28), the other end of the shaft of the cutting roller (6) is fixedly connected to a first gear (29), and one end of the shaft of the idler roller (7) is fixedly connected to a second gear (30).

10. The automatic blade gap adjustment mechanism of a modified plastic strip pelletizer according to claim 9, characterized in that: The first gear (29) meshes with the second gear (30). A motor is installed inside the body (1). The motor end is fixed with the pulley (28). The two pulleys (28) are connected by a belt. A controller (5) is fixed on the top of the body (1).

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