Plastic granulator capable of improving granularity uniformity of particles

Abstract

The utility model relates to the technical field of plastic pelletizing, in particular to a plastic pelletizer capable of improving particle size uniformity, which comprises a bottom plate, a vertical plate mounted at the upper end of the bottom plate, a moving plate arranged at the front end of the vertical plate, and a plurality of uniformly distributed double-edge pelletizing cutters mounted at the lower end of the moving plate. A plurality of through holes which are uniformly distributed and are respectively staggered with the plurality of double-edge pelletizing cutters are formed in the outer wall of the vertical plate in a penetrating manner; a section of strip-shaped plastic located on the front side of the vertical plate is rapidly cut into plastic particles through the blades on the left sides of the multiple double-blade pelletizing cutters, in the process, the multiple double-blade pelletizing cutters can make contact with the multiple pieces of strip-shaped plastic at the same time, and therefore the purpose of improving pelletizing uniformity is achieved, the plastic particles obtained after pelletizing are completed are prevented from splashing everywhere through the protection frame, and the pelletizing uniformity is improved. And then the plastic is gathered to one place through the discharging frame and is discharged into the material receiving disc, so that the purposes of preventing the cut plastic particles from splashing everywhere and conveniently collecting the plastic particles are achieved.

Description

Technical Field

[0001] This utility model relates to the field of plastic pelletizing technology, and specifically discloses a plastic pelletizer that can improve the uniformity of pellet size. Background Technology

[0002] Plastics are polymers made from monomers through addition or condensation polymerization. Microplastics can harm human health. Plastics have moderate resistance to deformation, falling between fibers and rubber. They are composed of synthetic resins and additives such as fillers, plasticizers, stabilizers, lubricants, and colorants. Before plastic granules are made, plastics are usually made into plastic strips, which are then cut into plastic pellets using a plastic pelletizer.

[0003] In the existing technology, the production process of granular plastic raw materials is as follows: the plastic raw material is added into the extruder and conveyed forward under the rotation of the screw. The heater (electric heating coil) outside the extruder barrel and the shearing action of the screw heat the plastic to a molten state. The molten plastic is extruded from the multi-hole die at the front end of the extruder to form a strip. The extruded strip plastic is cooled by a water tank or spray device. After cooling, the strip plastic is cut into granules by a plastic pelletizer, thus completing the production of granular plastic raw materials.

[0004] Currently, most mainstream pelletizers are rotary pelletizers, which work by cutting continuously extruded strips of plastic using rotating blades. However, because the blades of rotary pelletizers move in a circular motion around an axis, they cannot simultaneously contact multiple plastic strips, while the strips continue to move forward. This results in the first strip to contact the blade being cut into smaller pellets, while subsequent strips, due to accumulated displacement, produce larger pellets, leading to uneven pellet size. Furthermore, the rotating blades cause plastic pellets to scatter, affecting proper collection. Therefore, a plastic pelletizer that improves pellet size uniformity is needed to solve this problem. Utility Model Content

[0005] This invention proposes a plastic pelletizer that can improve the uniformity of particle size. It features improved pelletizing uniformity, prevention of plastic pellets from splashing everywhere after cutting, and convenient collection of plastic pellets.

[0006] This utility model is implemented as follows: a plastic pelletizer that can improve the uniformity of particle size includes a base plate, a vertical plate installed on the upper end of the base plate, a movable plate provided at the front end of the vertical plate, a plurality of evenly distributed double-edged pelletizing blades installed at the lower end of the movable plate, a plurality of evenly distributed through holes that are staggered with the plurality of double-edged pelletizing blades on the outer wall of the vertical plate, and a driving mechanism provided on the upper side of the movable plate.

[0007] The driving mechanism includes a turntable rotatably connected to the front end of the vertical plate, a stepper motor with its output end fixedly connected to the turntable is installed at the rear end of the vertical plate, an eccentric shaft is rotatably connected to the front end of the turntable, a connecting plate is installed at the upper end of the moving plate, and a connecting rod fixedly connected to the eccentric shaft is movably connected to the right end of the connecting plate through a hinge.

[0008] A protective frame is installed at the front end of the vertical plate, a guide frame is provided at the lower end of the protective frame, a discharge frame is provided on the lower side of the guide frame, and a receiving tray is placed at the upper end of the bottom plate.

[0009] A propulsion mechanism is provided on the rear side of the vertical plate.

[0010] As a preferred embodiment of this utility model of a plastic pelletizer that can improve particle size uniformity, the propulsion mechanism includes a support platform installed at the rear end of a vertical plate. An electric telescopic rod is installed at the upper end of the support platform. A U-shaped frame is installed at the output end of the electric telescopic rod. A first rotating shaft is rotatably connected inside the U-shaped frame. A drive motor with its output end fixedly connected to the first rotating shaft is installed on the outer wall of the U-shaped frame. A plurality of first positioning wheels evenly distributed to the left and right are installed on the outer wall of the first rotating shaft. Two side plates distributed to the left and right are installed at the rear end of the vertical plate. A second rotating shaft is rotatably connected between the two side plates. A plurality of second positioning wheels distributed to the left and right and located above the first positioning wheels are installed on the outer wall of the second rotating shaft.

[0011] As a preferred embodiment of this utility model of a plastic pelletizer that can improve particle size uniformity, the front end of the vertical plate is equipped with a slide rail, and the moving plate is slidably connected to the vertical plate through the slide rail.

[0012] As a preferred embodiment of the present invention, a plastic pelletizer that can improve the uniformity of particle size, wherein the front end of the vertical plate is provided with a slot, and the receiving tray extends into the interior of the slot.

[0013] As a preferred embodiment of the present invention, a plastic pelletizer that can improve the uniformity of particle size, the upper end of the support platform is equipped with two guide cylinders distributed front and rear, and the interior of each of the two guide cylinders is slidably connected with a guide rod that is fixedly connected to the U-shaped frame.

[0014] As a preferred embodiment of this utility model of a plastic pelletizer that can improve particle size uniformity, the slide rail has a dovetail-shaped structure.

[0015] As a preferred embodiment of the present invention, a plastic pelletizer that can improve the uniformity of particle size, is provided with mounting plates having multiple mounting holes at both ends of the base plate.

[0016] The beneficial effects of this utility model are:

[0017] The strip of plastic is pushed forward by a feeding mechanism, and then the turntable is rotated 180 degrees clockwise by a stepper motor. At the same time, the moving plate and multiple double-edged pelletizing blades move a certain distance to the right, so that the multiple double-edged pelletizing blades quickly pass through multiple through holes. The right edge of the multiple double-edged pelletizing blades quickly cuts a section of the strip of plastic located in front of the vertical plate into plastic pellets. When the strip of plastic located in front of the vertical plate has a suitable length, the turntable is rotated 180 degrees clockwise again by a stepper motor, so that the left edge of the multiple double-edged pelletizing blades quickly cuts a section of the strip of plastic located in front of the vertical plate into plastic pellets. During this process, multiple double-edged pelletizing blades will contact multiple strips of plastic at the same time, thereby improving the uniformity of pelletizing.

[0018] The protective frame prevents the cut plastic granules from splashing everywhere. Then, the discharge frame gathers the plastic in one place and discharges it into the receiving tray, thus preventing the cut plastic granules from splashing everywhere and facilitating the collection of plastic granules. Attached Figure Description

[0019] 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.

[0020] Figure 1 This is a front cross-sectional view of a plastic pelletizer that can improve particle size uniformity according to the present invention.

[0021] Figure 2 This is a cross-sectional view of the entire utility model from the left side.

[0022] Figure 3 This is an external structural diagram of the U-shaped frame of this utility model;

[0023] Figure 4 This is a diagram showing the connection structure at the side plate of this utility model.

[0024] The markings in the diagram are: 1. Base plate; 2. Vertical plate; 3. Moving plate; 4. Double-edged pelletizer; 5. Through hole; 6. Turntable; 7. Stepper motor; 8. Eccentric shaft; 9. Connecting plate; 10. Connecting rod; 11. Slide rail; 12. Protective frame; 13. Guide frame; 14. Discharge frame; 15. Receiving tray; 16. Groove; 17. Electric telescopic rod; 18. Drive motor; 19. U-shaped frame; 20. First rotating shaft; 21. First positioning wheel; 22. Side plate; 23. Second rotating shaft; 24. Second positioning wheel; 25. Support platform. Detailed Implementation

[0025] 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.

[0026] Please see Figure 1-4 A plastic pelletizer that can improve the uniformity of particle size includes a base plate 1, a vertical plate 2 installed on the upper end of the base plate 1, a movable plate 3 provided at the front end of the vertical plate 2, a plurality of evenly distributed double-edged pelletizing blades 4 installed at the lower end of the movable plate 3, a plurality of evenly distributed through holes 5 through the outer wall of the vertical plate 2 and interspersed with the plurality of double-edged pelletizing blades 4, and a drive mechanism provided on the upper side of the movable plate 3.

[0027] The drive mechanism includes a turntable 6 rotatably connected to the front end of the vertical plate 2, a stepper motor 7 with its output end fixedly connected to the turntable 6 installed at the rear end of the vertical plate 2, an eccentric shaft 8 rotatably connected to the front end of the turntable 6, a connecting plate 9 installed at the upper end of the moving plate 3, and a connecting rod 10 fixedly connected to the eccentric shaft 8 movably connected to the right end of the connecting plate 9 via a hinge.

[0028] A protective frame 12 is installed at the front end of the vertical plate 2, a guide frame 13 is provided at the lower end of the protective frame 12, a discharge frame 14 is provided on the lower side of the guide frame 13, and a receiving tray 15 is placed at the upper end of the bottom plate 1.

[0029] A propulsion mechanism is provided on the rear side of the vertical plate 2.

[0030] In this embodiment: During use, the multiple strips of plastic after cooling and solidification are positioned by the propulsion mechanism and pushed forward. Multiple through holes 5 allow the multiple strips of plastic to pass through. Subsequently, the stepper motor 7 drives the turntable 6 to rotate 180 degrees clockwise, thereby causing the eccentric shaft 8 to move rapidly from the left side to the right side of the turntable 6. Since the connecting rod 10 is fixedly connected to the eccentric shaft 8 and the connecting rod 10 is movably connected to the connecting plate 9 through a hinge, the connecting plate 9 moves a certain distance to the right. Simultaneously, the moving plate 3 and multiple double-edged pelletizing blades 4 move a certain distance to the right. The double-edged pelletizing blades 4 are in contact with the front side of the vertical plate 2, allowing them to quickly pass through the multiple through holes 5. The right-side blades of the multiple double-edged pelletizing blades 4 quickly cut a section of strip plastic located in front of the vertical plate 2 into plastic pellets. The double-edged pelletizer 4 has a short travel distance and a very short pelletizing time, requiring the turntable 6 to pause for a period of time to keep the double-edged pelletizer 4 at its current position. When the strip of plastic in front of the vertical plate 2 has a suitable length, the stepper motor 7 drives the turntable 6 to rotate 180 degrees clockwise again, and the eccentric shaft 8 located on the right side rotates to the left side, simultaneously driving multiple double-edged pelletizers 4 to move to the left to their initial position. Thus, the blades on the left side of the multiple double-edged pelletizers 4 quickly cut the strip of plastic in front of the vertical plate 2 into plastic pellets. During this process, multiple double-edged pelletizers 4 will contact multiple strips of plastic at the same time, thereby improving the uniformity of pelletizing. It should be noted that the stepper motor 7 will run according to a pre-set program, with high operational stability and positioning accuracy, fast response speed, and good repeatability.

[0031] By setting up the protective frame 12, the plastic granules after being cut can be prevented from splashing everywhere. At the same time, the plastic granules are guided by the guide frame 13 to the inside of the discharge frame 14. The discharge frame 14 gathers the plastic in one place and discharges it into the inside of the receiving tray 15. The receiving tray 15 collects the plastic granules. In this way, the purpose of preventing the plastic granules after cutting from splashing everywhere is achieved, and the purpose of collecting the plastic granules is facilitated.

[0032] As a technical optimization of this utility model, the propulsion mechanism includes a support platform 25 installed at the rear end of the vertical plate 2. An electric telescopic rod 17 is installed at the upper end of the support platform 25. A U-shaped frame 19 is installed at the output end of the electric telescopic rod 17. A first rotating shaft 20 is rotatably connected inside the U-shaped frame 19. A drive motor 18 with its output end fixedly connected to the first rotating shaft 20 is installed on the outer wall of the U-shaped frame 19. A plurality of first positioning wheels 21 evenly distributed to the left and right are installed on the outer wall of the first rotating shaft 20. Two side plates 22 distributed to the left and right are installed at the rear end of the vertical plate 2. A second rotating shaft 23 is rotatably connected between the two side plates 22. A plurality of second positioning wheels 24 distributed to the left and right and located above the first positioning wheels 21 are installed on the outer wall of the second rotating shaft 23.

[0033] In this embodiment: multiple strips of plastic that have cooled and solidified pass between the first positioning wheel 21 and the second positioning wheel 24, which are positioned vertically opposite each other. The electric telescopic rod 17 drives the U-shaped frame 19, the first rotating shaft 20, and the multiple first positioning wheels 21 to move upward until the strips of plastic abut against the first positioning wheels 21 and the second positioning wheels 24. The drive motor 18 drives the first rotating shaft 20 and the multiple first positioning wheels 21 to rotate clockwise from a left-view perspective. Since the multiple second positioning wheels 24 can rotate with the second rotating shaft 23, the multiple strips of plastic can be pushed forward. The forward pushing speed should be the same as the extrusion speed of the extruder. The multiple strips of plastic are positioned by the grooves on the multiple first positioning wheels 21 and the multiple second positioning wheels 24.

[0034] As a technical optimization of this utility model, a slide rail 11 is installed at the front end of the vertical plate 2, and the movable plate 3 is slidably connected to the vertical plate 2 through the slide rail 11.

[0035] In this embodiment, the slide rail 11 is provided to improve the stability of the movement of the moving plate 3.

[0036] As a technical optimization of this utility model, the front end of the vertical plate 2 is provided with a slot 16, and the receiving tray 15 extends into the interior of the slot 16.

[0037] In this embodiment: by setting the slot 16, the rear side of the receiving tray 15 can enter the interior of the slot 16, thereby making the interior of the receiving tray 15 correspond to the position of the discharge frame 14, thus improving the receiving effect.

[0038] As a technical optimization of this utility model, two guide cylinders distributed front and rear are installed on the upper end of the support platform 25, and guide rods that are fixedly connected to the U-shaped frame 19 are slidably connected inside the two guide cylinders.

[0039] In this embodiment, two guide cylinders and two guide rods are provided to improve the stability of the movement of the U-shaped frame 19.

[0040] As a technical optimization of this utility model, the slide rail 11 has a dovetail structure.

[0041] In this embodiment: Since the slide rail 11 has a dovetail structure, it can prevent the moving plate 3 from moving in the front and back directions.

[0042] As a technical optimization of this utility model, mounting plates with multiple mounting holes are installed on both the left and right ends of the base plate 1.

[0043] In this embodiment: by setting two mounting plates, and then using fasteners to fit the mounting holes, the device can be fixed, thereby improving the overall stability.

[0044] The working principle and usage process of this utility model are as follows: In use, multiple strips of cooled and solidified plastic are first positioned between the upper and lower opposing first positioning wheels 21 and second positioning wheels 24. The electric telescopic rod 17 drives the U-shaped frame 19, the first rotating shaft 20, and the multiple first positioning wheels 21 to move upwards until the strips of plastic abut against the first positioning wheels 21 and second positioning wheels 24. Then, the drive motor 18 drives the first rotating shaft 20 and the multiple first positioning wheels 21 to rotate clockwise from a left-view perspective. Since the multiple second positioning wheels 24 can rotate with the second rotating shaft 23, the process continues... Multiple strips of plastic can be pushed forward at the same speed as the extrusion speed of the extruder. The strips are positioned by grooves on multiple first positioning wheels 21 and multiple second positioning wheels 24, while multiple through holes 5 allow the strips to pass through. A stepper motor 7 then drives the turntable 6 to rotate 180 degrees clockwise, causing the eccentric shaft 8 to move rapidly from the left to the right side of the turntable 6. Since the connecting rod 10 is fixedly connected to the eccentric shaft 8 and movably connected to the connecting plate 9 via a hinge, the connecting plate 9 moves a certain distance to the right, simultaneously driving... The moving plate 3 and multiple double-edged pelletizing blades 4 move rapidly to the right a certain distance, bringing the double-edged pelletizing blades 4 into contact with the front side of the vertical plate 2. This allows the multiple double-edged pelletizing blades 4 to quickly pass through multiple through holes 5, and the right-side blades of the multiple double-edged pelletizing blades 4 rapidly cut a strip of plastic located in front of the vertical plate 2 into plastic pellets. Because the travel distance of the double-edged pelletizing blades 4 is short and the pelletizing time is very short, the turntable 6 needs to pause for a period of time to keep the double-edged pelletizing blades 4 at their current position. When the strip of plastic located in front of the vertical plate 2 has reached a suitable length, the stepper motor 7... The turntable 6 rotates 180 degrees clockwise again, and the eccentric shaft 8, located on the right, rotates to the left. At the same time, it drives multiple double-edged pelletizing blades 4 to move to the initial position to the left. Thus, the blades on the left side of the multiple double-edged pelletizing blades 4 quickly cut a strip of plastic located in front of the vertical plate 2 into plastic pellets. During this process, multiple double-edged pelletizing blades 4 will contact multiple strips of plastic at the same time, thereby improving the uniformity of pelletizing. It should be noted that the stepper motor 7 will run according to the preset program. It has high running stability and positioning accuracy, fast response speed, and good repeatability.

[0045] By setting up the protective frame 12, the plastic granules after being cut can be prevented from splashing everywhere. At the same time, the plastic granules are guided by the guide frame 13 to the inside of the discharge frame 14. The discharge frame 14 gathers the plastic in one place and discharges it into the inside of the receiving tray 15. The receiving tray 15 collects the plastic granules. In this way, the purpose of preventing the plastic granules after cutting from splashing everywhere is achieved, and the purpose of collecting the plastic granules is facilitated.

[0046] 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.

[0047] 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 pelletizer that can improve the uniformity of particle size, comprising a base plate (1), characterized in that: A vertical plate (2) is installed on the upper end of the base plate (1). A movable plate (3) is provided at the front end of the vertical plate (2). A plurality of evenly distributed double-edged pelletizing blades (4) are installed at the lower end of the movable plate (3). A plurality of evenly distributed through holes (5) are provided through the outer wall of the vertical plate (2) and are respectively staggered with the plurality of double-edged pelletizing blades (4). A driving mechanism is provided on the upper side of the movable plate (3). The driving mechanism includes a turntable (6) rotatably connected to the front end of the vertical plate (2), a stepper motor (7) with its output end fixedly connected to the turntable (6) is installed at the rear end of the vertical plate (2), an eccentric shaft (8) is rotatably connected to the front end of the turntable (6), a connecting plate (9) is installed at the upper end of the moving plate (3), and a connecting rod (10) fixedly connected to the eccentric shaft (8) is movably connected to the right end of the connecting plate (9) through a hinge seat; A protective frame (12) is installed at the front end of the vertical plate (2), a guide frame (13) is provided at the lower end of the protective frame (12), a discharge frame (14) is provided on the lower side of the guide frame (13), and a receiving tray (15) is placed at the upper end of the bottom plate (1). A propulsion mechanism is provided on the rear side of the vertical plate (2).

2. The plastic pelletizer for improving particle size uniformity according to claim 1, characterized in that: The propulsion mechanism includes a support platform (25) installed at the rear end of the vertical plate (2). An electric telescopic rod (17) is installed at the upper end of the support platform (25). A U-shaped frame (19) is installed at the output end of the electric telescopic rod (17). A first rotating shaft (20) is rotatably connected inside the U-shaped frame (19). A drive motor (18) whose output end is fixedly connected to the first rotating shaft (20) is installed on the outer wall of the U-shaped frame (19). A plurality of first positioning wheels (21) evenly distributed to the left and right are installed on the outer wall of the first rotating shaft (20). Two side plates (22) distributed to the left and right are installed at the rear end of the vertical plate (2). A second rotating shaft (23) is rotatably connected between the two side plates (22). A plurality of second positioning wheels (24) distributed to the left and right and located above the first positioning wheels (21) are installed on the outer wall of the second rotating shaft (23).

3. A plastic pelletizer for improving particle size uniformity according to claim 1, characterized in that: The front end of the vertical plate (2) is equipped with a slide rail (11), and the movable plate (3) is slidably connected to the vertical plate (2) through the slide rail (11).

4. A plastic pelletizer for improving particle size uniformity according to claim 1, characterized in that: The front end of the vertical plate (2) is provided with a slot (16), and the receiving tray (15) extends into the interior of the slot (16).

5. A plastic pelletizer for improving particle size uniformity according to claim 2, characterized in that: The upper end of the support platform (25) is equipped with two guide cylinders distributed front and back, and the interior of each guide cylinder is slidably connected with a guide rod that is fixedly connected to the U-shaped frame (19).

6. A plastic pelletizer for improving particle size uniformity according to claim 3, characterized in that: The slide rail (11) has a dovetail-shaped structure.

7. A plastic pelletizer for improving particle size uniformity according to claim 1, characterized in that: The base plate (1) is equipped with mounting plates with multiple mounting holes at both its left and right ends.

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