A plastic pelletizing device

Abstract

This invention discloses a plastic pelletizing device, belonging to the field of plastic processing technology. It includes: a feed inlet on the side wall of a housing; an opening at the top of the housing with a top cover; a guide plate inside the housing, one end of which is connected to the top cover, and the other end connected to the housing; and a discharge outlet on the guide plate. A transmission mechanism is located inside the housing and is used to move plastic filaments. A cutting roller is located inside the housing and rotatably connected to it. Multiple cutting blades are evenly distributed on the cutting roller, which is used to cut the portion of the plastic filaments that has been pulled out of the guide plate by the transmission mechanism. An air jet pipe is located on the side of the cutting roller away from the discharge outlet, extending to the outside of the housing and connected to an air pump. A collection mechanism is located below the cutting roller. This invention can uniformly cut plastic pellets and effectively improve the service life of the cutting blades.

Description

Technical Field

[0001] This invention belongs to the field of plastic processing technology, and specifically relates to a plastic pelletizing device. Background Technology

[0002] Plastic granules are semi-finished products in the plastic molding and processing industry. Plastic powder is mixed with various masterbatch powders and melted to form a melt. The raw material is then extruded and drawn into filaments. The molten plastic filaments are cooled in a cooling tank and then cut using a cutting tool to form the desired plastic granules. However, due to the potential for deviation in the plastic filaments and the cutting tool, and the wear and tear on the cutting tool over time, the friction between the cutting tool and the plastic granules can generate heat, potentially causing the plastic filaments to stick to the cutting tool. This can easily lead to uneven cutting of the plastic granules during the granulation process, resulting in inconsistent particle size and shape, and ultimately reducing the quality of the plastic granules. Therefore, providing a plastic granule cutting device that can uniformly cut plastic granules is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0003] In view of this, the present invention provides a plastic pelletizing device that can uniformly cut plastic pellets and improve the service life of the cutting tools.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A plastic pelletizing device, comprising:

[0006] The housing has a feed inlet on its side wall, an opening on its top, a top cover at the opening, a guide plate inside the housing, one end of the guide plate connected to the top cover, the other end of the guide plate connected to the housing, and a discharge outlet on the guide plate.

[0007] A transmission mechanism is disposed inside the housing and is used to pull the plastic filaments to move.

[0008] A cutting roller is disposed inside the housing and is rotatably connected to the housing. Multiple cutting blades are evenly distributed on the cutting roller. The cutting roller is used to cut the part of the plastic filament that is pulled out of the guide plate by the transmission mechanism.

[0009] An air jet pipe is provided on the side of the cutting roller away from the discharge port, and the air jet pipe extends to the outside of the housing and is connected to the air pump.

[0010] A collection mechanism is provided below the cutting roller.

[0011] Preferably, the transmission mechanism includes a first rotating roller, a second rotating roller, a connecting member, and a lifting motor. The lifting motor is mounted on the top cover, and the lifting rod of the lifting motor passes through the top cover and is fixedly connected to the connecting member. Both ends of the second rotating roller are rotatably connected to the connecting member. One end of the first rotating roller is rotatably connected to the housing, and the other end of the first rotating roller extends to the outside of the housing and is drivenly connected to the output end of the rotating motor. A gap is provided between the first rotating roller and the second rotating roller, and the gap is less than or equal to the diameter of the plastic filament.

[0012] Preferably, the collecting mechanism includes a vibrating screen, a screen support, a first collecting box, and a second collecting box. The screen support is fixedly connected to the housing, and the vibrating screen is fixedly connected to the screen support. The vibrating screen is disposed below the cutting roller and extends to the opening of the first collecting box. The second collecting box is disposed below the vibrating screen.

[0013] Preferably, the pelletizing device further includes a warm air duct, which is located at the feed inlet and extends to the outside of the housing and is connected to a warm air blower.

[0014] Preferably, the pelletizing device further includes a water-absorbing roller, an extrusion plate, and a guide pipe. The water-absorbing roller is disposed between the feed inlet and the conveying mechanism. Both ends of the water-absorbing roller are rotatably connected to the housing. The water-absorbing roller is in contact with the plastic filaments. The extrusion plate has an arc-shaped structure, and the radius of the arc-shaped extrusion plate is larger than the radius of the water-absorbing roller. A drain hole is provided at the bottom end of the extrusion plate. One end of the guide pipe is connected to the drain hole, and the other end of the guide pipe extends to the outside of the housing.

[0015] Preferably, the bottom of the housing is provided with a hinged door.

[0016] The beneficial effects of this invention are as follows:

[0017] This invention allows plastic filaments to pass sequentially through the inlet, conveying mechanism, and outlet, effectively reducing the probability of filament deviation. Simultaneously, by controlling the conveying mechanism to transport the plastic filaments at a uniform speed, in conjunction with the uniform rotation of the cutting roller, the uniformity of plastic particle cutting is improved. Furthermore, the cutting roller is equipped with multiple cutting blades, which rotate sequentially, reducing blade wear compared to prolonged use of a single blade. The rotation of the cutting blades with the cutting roller also helps lower blade temperature, reducing the possibility of plastic filaments sticking to the blades due to continuous friction and heating. By intermittently activating the air pump, air is intermittently sprayed from the air jet pipe, blowing off plastic particles stuck to the blades and causing them to fall into the collection mechanism. This also provides a certain cooling effect to the blades. Additional aspects and advantages of this invention will be set forth in part in the description which follows, and will become apparent from the description. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a cross-sectional schematic diagram of the present invention;

[0020] Figure 2 This is a front view of the present invention;

[0021] Figure 3 This is a schematic diagram of the cutting roller of the present invention.

[0022] In the figure:

[0023] 1. Shell; 2. Feed inlet; 3. Top cover; 4. Guide plate; 5. Cutting roller; 6. Cutting blade; 7. Air jet pipe; 8. First roller; 9. Second roller; 10. Connecting parts; 11. Lifting motor; 12. Vibrating screen; 13. Screen support; 14. First collection box; 15. Second collection box; 16. Warm air pipe; 17. Guide pipe; 18. Extrusion plate; 19. Water absorption roller; 20. Hinged door. Detailed Implementation

[0024] 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.

[0025] See appendix Figure 1-3 This invention discloses a plastic pelletizing device, comprising:

[0026] The housing 1 has a feed inlet 2 on its side wall and an opening at its top with a top cover 3. A guide plate 4 is located inside the housing 1, with one end connected to the top cover 3 and the other end connected to the housing 1. The guide plate 4 has a discharge outlet. The top cover 3 is detachably connected, preferably by bolts. The internal mechanisms of the housing 1 can be installed through the opening at the top of the housing 1. The guide plate 4 is fixedly connected to the top cover 3. Preferably, the number of discharge outlets on the guide plate 4 is the same as the number of feed inlets 2. Each feed inlet 2 allows a plastic filament to enter, preventing the plastic filaments from sticking together.

[0027] The transmission mechanism is located inside the housing 1 and is used to pull the plastic filaments to move. The transmission mechanism provides power to the plastic filaments entering the feed port 2, pulling the plastic filaments forward at a constant speed. After being pulled by the transmission mechanism, the plastic filaments pass through the discharge port one by one and enter the cutting position.

[0028] A cutting roller 5 is disposed inside the housing 1 and rotatably connected to the housing 1. Multiple cutting blades 6 are evenly distributed on the cutting roller 5. The cutting roller 5 is used to cut the portion of the plastic filament that has been drawn out of the guide plate 4 by the transmission mechanism. Preferably, six cutting blades 6 are provided. The cutting roller 5 rotates clockwise, and the cutting blades 6 rotate sequentially for cutting. Compared to using a single blade for long-term cutting, this results in less wear on the blade. Furthermore, the rotation of the cutting blades 6 with the cutting roller 5 helps to reduce the temperature of the cutting blades 6 and decrease the continuous cutting speed. Friction and heating may cause plastic filaments to stick to the cutting blade 6. The cutting blade 6 is preferably tilted in the direction of rotation of the cutting roller 5. This not only reduces damage to the cutting blade 6 during the cutting process, but also catches the cut plastic particles and transports them to the side away from the discharge port before they fall into the collection mechanism, which facilitates the screening of the collection mechanism. When the cutting blade 6 is in the position closest to the guide plate 4, there is a gap between the tip of the cutting blade 6 and the guide plate 4 to prevent the cutting blade 6 from making hard contact with the guide plate 4 and causing damage to the cutting blade 6.

[0029] The air jet pipe 7 is located on the side of the cutting roller 5 away from the discharge port. The air jet pipe 7 extends to the outside of the housing 1 and is connected to the air pump. The air pump is controlled to open indirectly, so that the air jet pipe 7 sprays air with a certain impact force at intervals, which can blow off the plastic particles adhering to the cutting blade 6 and make them fall into the collection mechanism. At the same time, it can also play a certain role in cooling the cutting blade 6.

[0030] A collection mechanism is located below the cutting roller 5; plastic particles are collected by screening through the collection mechanism.

[0031] In this embodiment, preferably, the transmission mechanism includes a first rotating roller 8, a second rotating roller 9, a connecting member 10, and a lifting motor 11. The lifting motor 11 is mounted on the top cover 3, and the lifting rod of the lifting motor 11 passes through the top cover 3 and is fixedly connected to the connecting member 10. Both ends of the second rotating roller 9 are rotatably connected to the connecting member 10. One end of the first rotating roller 8 is rotatably connected to the housing 1, and the other end of the first rotating roller 8 extends to the outside of the housing 1 and is drivenly connected to the output end of the rotary motor. A gap is provided between the first rotating roller 8 and the second rotating roller 9, and the gap is less than or equal to the diameter of the plastic filament. During rotation, the first rotating roller 8 is driven to rotate by the rotary motor. The first roller 8 drives the second roller 9 to rotate via the plastic filaments, thereby transmitting the plastic filaments. The first roller 8 and the second roller 9 are made of a relatively soft material, preferably rubber. The lifting motor 11 controls the lifting and lowering of the second roller 9. After the plastic filaments are all placed on the first roller 8, the second roller 9 is lowered to press the plastic filaments until the gap between the first roller 8 and the second roller 9 is slightly smaller than the diameter of the plastic filaments. Because a relatively soft rubber material is used, it can prevent the plastic filaments from being squeezed and deformed. At the same time, small grooves are formed on the surfaces of the first roller 8 and the second roller 9, thereby reducing the possibility of the plastic filaments shifting during transportation.

[0032] In this embodiment, preferably, the collection mechanism includes a vibrating screen 12, a screen support 13, a first collection box 14, and a second collection box 15. The screen support 13 is fixedly connected to the housing 1, and the vibrating screen 12 is fixedly connected to the screen support 13. The vibrating screen 12 is located below the cutting roller 5 and extends to the opening of the first collection box 14. The second collection box 15 is located below the vibrating screen 12. The vibrating screen 12 prevents plastic particles from sticking together by vibration, improving the finished product quality of the plastic particles. In addition, the vibrating screen 12 can also separate the powder and smaller plastic particles during the cutting process into the second collection box 15 directly below, and separate the larger plastic particles into the first collection box 14. The waste in the second collection box 15 can be recycled again, improving the utilization rate.

[0033] In this embodiment, preferably, the pelletizing device further includes a warm air duct 16, which is located at the feed inlet 2 and extends to the outside of the housing 1 and is connected to a heater. Plastic filaments are generally cut directly after being cooled by water. By blowing warm air through the warm air duct 16, the temperature of the plastic filaments can be adjusted to be close to the Vicat softening point temperature, so as to ensure that the plastic filaments are heat-cut as much as possible, thereby avoiding cracking and improving the quality of the cut plastic pellets. It can also reduce the moisture on the surface of the plastic filaments and prevent the cutting blade 6 from being contaminated with too much moisture.

[0034] In this embodiment, preferably, the pelletizing device further includes a water-absorbing roller 19, an extrusion plate 18, and a guide pipe 17. The water-absorbing roller 19 is disposed between the feed inlet 2 and the conveying mechanism. Both ends of the water-absorbing roller 19 are rotatably connected to the housing 1. The water-absorbing roller 19 is in contact with the plastic filaments. The extrusion plate 18 has an arc-shaped structure, and the radius of the arc-shaped extrusion plate 18 is larger than the radius of the water-absorbing roller 19. A drain hole is provided at the bottom end of the extrusion plate 18. One end of the guide pipe 17 is connected to the drain hole, and the other end of the guide pipe 17 extends to the outside of the housing 1. The water-absorbing roller 19 is preferably made of sponge material, which can effectively reduce the influence on the deformation of the plastic filaments. The water-absorbing roller 19 is in contact with the plastic filaments and can absorb excess water from the plastic filaments. After absorbing water, the water-absorbing roller 19 rotates downward and is squeezed by the extrusion plate 18 to squeeze out the water from the water-absorbing roller 19. The water flows through the drain hole to the guide pipe 17, and the water finally flows back to the cooling pool along the guide pipe 17.

[0035] In this embodiment, preferably, a hinged door 20 is provided at the bottom of the housing 1. The hinged door 20 facilitates the removal of the first collection box 14 and the second collection box 15. Preferably, the first collection box 14 is located near the hinged door 20 to facilitate the collection of the first collection box 14.

[0036] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to the embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A plastic pelletizing device, characterized in that, include: The housing has a feed inlet on its side wall, an opening on its top, a top cover at the opening, and a guide plate inside the housing. One end of the guide plate is connected to the top cover, and the other end is connected to the housing. The guide plate, the top cover, and the housing form a warm air transmission chamber. The guide plate has a discharge outlet. A transmission mechanism is disposed inside the housing and is used to pull the plastic filaments to move. A cutting roller is disposed inside the housing and is rotatably connected to the housing. Multiple cutting blades are evenly distributed on the cutting roller. The cutting roller is used to cut the part of the plastic filament that is pulled out of the guide plate by the transmission mechanism. An air jet pipe is provided on the side of the cutting roller away from the discharge port, and the air jet pipe extends to the outside of the housing and is connected to the air pump. A collection mechanism is provided below the cutting roller; It also includes a warm air duct, which is located at the feed inlet and extends to the outside of the housing and is connected to the heater. Both the transmission mechanism and the heating air duct are located within the transmission heating air chamber; It also includes a water-absorbing roller, an extrusion plate, and a guide pipe. The water-absorbing roller is disposed between the feed inlet and the conveying mechanism. Both ends of the water-absorbing roller are rotatably connected to the housing. The water-absorbing roller is in contact with the plastic filaments. The extrusion plate has an arc-shaped structure, and the radius of the arc-shaped extrusion plate is larger than the radius of the water-absorbing roller. A drain hole is provided at the bottom end of the extrusion plate. One end of the guide pipe is connected to the drain hole, and the other end of the guide pipe extends to the outside of the housing.

2. The plastic pelletizing device according to claim 1, characterized in that, The transmission mechanism includes a first rotating roller, a second rotating roller, a connecting member, and a lifting motor. The lifting motor is mounted on the top cover, and the lifting rod of the lifting motor passes through the top cover and is fixedly connected to the connecting member. Both ends of the second rotating roller are rotatably connected to the connecting member. One end of the first rotating roller is rotatably connected to the housing, and the other end of the first rotating roller extends to the outside of the housing and is drivenly connected to the output end of the rotating motor. A gap is provided between the first rotating roller and the second rotating roller, and the gap is less than or equal to the diameter of the plastic filament.

3. The plastic pelletizing device according to claim 1, characterized in that, The collection mechanism includes a vibrating screen, a screen support, a first collection box, and a second collection box. The screen support is fixedly connected to the housing, and the vibrating screen is fixedly connected to the screen support. The vibrating screen is located below the cutting roller and extends to the opening of the first collection box. The second collection box is located below the vibrating screen.

4. The plastic pelletizing device according to claim 1, characterized in that, A hinged door is provided at the bottom of the housing.

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