A cooling device for plastic pellet production

Abstract

This utility model relates to the field of plastic granulation production technology and discloses a cooling device for plastic granulation production, including a cooling box. An extruder body is placed on the left side of the cooling box, and an extrusion die is fixedly installed on the right end of the extruder body. Two mounting plates are fixedly installed on the right end of the upper surface of the cooling box. An auxiliary cleaning mechanism is set on the cooling box, which includes an L-shaped plate and a triangular plate. Threaded rods are rotatably installed on the left and right inner walls of the cooling box. The L-shaped plate is threaded onto the outer surface of the threaded rod. A second motor drives the threaded rod and the L-shaped plate to completely push the sediment to the vicinity of the water outlet pipe. With the help of a high-pressure water gun, manual cleaning is not required inside the cooling box. This prevents the first guide rod from affecting the cleaning of sediment at the bottom of the cooling box by the workers, thereby improving the cleaning efficiency of the cooling box and the work efficiency of the workers.

Description

Technical Field

[0001] This utility model relates to the field of plastic granulation production technology, specifically a cooling device for plastic granulation production. Background Technology

[0002] Plastic granulation is the process of processing plastic raw materials (virgin or waste plastics) into granular semi-finished products. It is a key link in the plastic industry chain, and the process is as follows: First, the raw materials are sorted, cleaned, and crushed to remove impurities and reduce volume; then, they are heated to 150–250℃ in an extruder to melt and plasticize, and then pushed to a die by a screw to extrude the material into strips; subsequently, they are cooled and granulated by water cooling, air cooling, or hot cutting; finally, unqualified granules are screened to remove them, dried, and packaged. Recycling granulation can recycle waste plastics and achieve resource recycling, but it is necessary to address the issues of raw material mixing and environmental protection. Granules are widely used in packaging, injection molding, pipes, and other fields, and in recent years, they have been developing towards intelligent, green, and high-value directions, contributing to the circular economy of the plastic industry.

[0003] In the process of plastic granulation, cooling devices are used to cool the plastic extruded from the extruder. Currently, water cooling is mostly used, which involves the extruded strip entering the water inside the cooling tank for cooling. The cooling tank is usually equipped with guide rollers to guide and transport the strip. This means that when cleaning the sediment at the bottom of the cooling tank, these guide rollers will affect the cleaning of the cooling tank by the workers, making it difficult for them to clean the cooling tank. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a cooling device for plastic granulation production. It solves the problem that the guide rollers usually installed inside the water cooling box guide the material strips, which makes it difficult for workers to clean the water cooling box when cleaning the sediment at the bottom of the water cooling box.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a cooling device for plastic granulation production, comprising a cooling box, an extruder body placed on the left side of the cooling box, an extrusion die fixedly installed on the right end of the extruder body, and two mounting plates fixedly installed on the right end of the upper surface of the cooling box.

[0008] An auxiliary cleaning mechanism is installed on the cooling box. The auxiliary cleaning mechanism includes an L-shaped plate and a triangular plate. Threaded rods are rotatably installed on the left and right inner walls of the cooling box. The L-shaped plate is threaded onto the outer surface of the threaded rods. The horizontal plate of the L-shaped plate slides in contact with the lower inner wall of the cooling box. The triangular plate is fixedly installed on the lower end of the left surface of the horizontal plate of the L-shaped plate. A water outlet pipe is fixedly installed on the left end of the rear surface of the cooling box. The front end of the water outlet pipe extends into the interior of the cooling box. Two first guide rods are rotatably installed on the rear inner wall of the cooling box.

[0009] Preferably, the auxiliary cleaning mechanism further includes a cover, which is slidably fitted onto the rear end of the water outlet pipe.

[0010] Preferably, a fixing screw is threadedly installed on the upper surface of the cover, the lower end of the fixing screw is threaded through into the water outlet pipe, and a throttle is fixedly installed on the upper end of the fixing screw.

[0011] Preferably, a first motor is fixedly installed on the rear surface of the cooling box at the position corresponding to the two first guide rods. The output ends of the two first motors rotate through into the interior of the cooling box, and the two first motors are fixedly connected to the two first guide rods respectively.

[0012] Preferably, a second motor is fixedly installed on the right surface of the cooling box, and the output end of the second motor rotates through into the interior of the cooling box. The second motor is fixedly connected to the threaded rod.

[0013] Preferably, a second guide rod is rotatably mounted on the adjacent surfaces of the two mounting plates, and a third motor is fixedly mounted on the rear surface of the rear mounting plate. The output end of the third motor rotatably extends through to the rear end of the second guide rod, and the third motor is fixedly connected to the second guide rod.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a cooling device for plastic granulation production, which has the following beneficial effects:

[0016] 1. This cooling device for plastic granulation production uses a second motor to drive a threaded rod and an L-shaped plate to completely push the sediment to the vicinity of the water outlet pipe. Combined with high-pressure water gun rinsing, it eliminates the need for manual entry into the cooling tank for cleaning. This prevents the first guide rod from affecting the cleaning of sediment at the bottom of the cooling tank, thereby improving the cleaning efficiency of the cooling tank and increasing the work efficiency of the staff. Attached Figure Description

[0017] Figure 1 This is a top view schematic diagram of the overall structure of the cooling device for plastic granulation production according to this utility model;

[0018] Figure 2This is a cross-sectional front view of the internal structure of the cooling box of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal cross-sectional side view of the cooling box of this utility model;

[0020] Figure 4 This is a top-view cross-sectional view of the internal structure of the cooling box of this utility model.

[0021] In the diagram: 1. Extruder body; 2. Extrusion die; 3. Cooling box; 4. Mounting plate; 5. L-shaped plate; 6. Triangular plate; 7. Threaded rod; 8. Water outlet pipe; 9. First guide rod; 10. Cover; 11. Fixing screw; 12. Throttle; 13. First motor; 14. Second motor; 15. Second guide rod; 16. Third motor. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 This utility model provides a new technical solution: including a cooling box 3, an extruder body 1 placed on the left side of the cooling box 3, an extrusion die 2 fixedly installed on the right end of the extruder body 1, and two mounting plates 4 fixedly installed on the right end of the upper surface of the cooling box 3.

[0024] An auxiliary cleaning mechanism is installed on the cooling box 3. The auxiliary cleaning mechanism includes an L-shaped plate 5 and a triangular plate 6. Threaded rods 7 are rotatably installed on the left and right inner walls of the cooling box 3. The L-shaped plate 5 is threaded onto the outer surface of the threaded rods 7. The horizontal plate of the L-shaped plate 5 slides in contact with the lower inner wall of the cooling box 3. The triangular plate 6 is fixedly installed on the lower end of the left surface of the horizontal plate of the L-shaped plate 5. A water outlet pipe 8 is fixedly installed on the left end of the rear surface of the cooling box 3. The front end of the water outlet pipe 8 extends into the interior of the cooling box 3. Two first guide rods 9 are rotatably installed on the rear inner wall of the cooling box 3.

[0025] Furthermore, the auxiliary cleaning mechanism also includes a cover 10, which is slidably fitted onto the rear end of the water outlet pipe 8.

[0026] Furthermore, the second motor 14 drives the threaded rod 7 and the L-shaped plate 5 to push the sediment completely to the vicinity of the water outlet pipe 8, and with the help of the high-pressure water gun for rinsing, there is no need for manual cleaning inside the cooling box. This prevents the first guide rod 9 from affecting the cleaning of sediment at the bottom of the cooling box 3 by the staff, thereby improving the cleaning efficiency of the cooling box and the work efficiency of the staff.

[0027] Furthermore, a fixing screw 11 is threadedly installed on the upper surface of the cover 10, the lower end of the fixing screw 11 is threaded through into the water outlet pipe 8, and a throttle 12 is fixedly installed on the upper end of the fixing screw 11.

[0028] Furthermore, a first motor 13 is fixedly installed on the rear surface of the cooling box 3 at the positions corresponding to the two first guide rods 9. The output ends of the two first motors 13 rotate through into the interior of the cooling box 3, and the two first motors 13 are fixedly connected to the two first guide rods 9 respectively.

[0029] Furthermore, a second motor 14 is fixedly installed on the right surface of the cooling box 3. The output end of the second motor 14 rotates through into the interior of the cooling box 3, and the second motor 14 is fixedly connected to the threaded rod 7.

[0030] Furthermore, a second guide rod 15 is rotatably mounted on the adjacent surfaces of the two mounting plates 4, and a third motor 16 is fixedly mounted on the rear surface of the rear mounting plate 4. The output end of the third motor 16 rotatably extends through to the rear end of the second guide rod 15, and the third motor 16 is fixedly connected to the second guide rod 15.

[0031] Furthermore, when using this cooling device, the extruder body 1 extrudes molten plastic into strips through the extrusion die 2. The strips enter the cooling tank 3 from the die outlet to the right. Cooling water is pre-filled into the cooling tank 3. The strips first contact the two first guide rods 9 inside the cooling tank, guiding the strips along a preset path in the water. Through forced convection of the water, the strips are rapidly cooled and solidified. After exiting from the right side of the cooling tank 3, the strips enter between the two mounting plates 4 and are guided by the second guide rod 15. The third motor 16 drives the second guide rod 15 to rotate, cooperating with the traction device of the subsequent pelletizer to control the traveling speed and tension of the strips, ensuring that the strips are cooled evenly and smoothly enter the pelletizing process. When it is necessary to clean the sediment such as mud, sand, and plastic debris at the bottom of the cooling tank 3, the second motor 14 is started. The second motor 14 drives the threaded rod 7 to rotate. Since the L-shaped plate 5 is threaded onto the threaded rod 7 and its horizontal plate slides in contact with the lower inner wall of the cooling box 3, the rotation of the threaded rod will cause the L-shaped plate 5 to move to the left along the bottom of the cooling box. When the L-shaped plate 5 moves to the left, the triangular plate 6 at the lower end of its left surface pushes the bottom sediment to the left. The inclined design of the triangular plate 6 can enhance the pushing effect. The sediment is gradually pushed to the front opening of the water outlet pipe 8 near the left inner wall of the cooling box. By rotating the handle 12 to unscrew the fixing screw 11, the cover 10 is removed. High-pressure water is sprayed from the top of the cooling box 3 into the interior of the cooling box. The water flow flushes out the residual sediment between the L-shaped plate 5 and the left inner wall of the cooling box and discharges it through the water outlet pipe 8, completing the cleaning. After cleaning, the second motor 14 is started in reverse to reset the L-shaped plate 5 and the triangular plate 6 to the right to the initial position.

[0032] Structural Description: Extruder Body 1: Heats and melts the plastic raw material to provide power for extrusion molding, and is the starting equipment for plastic granulation production;

[0033] Extrusion die 2: Fixedly installed at the right end of the extruder body 1, it extrudes molten plastic into a strip of a specific shape and determines the initial shape of the strip;

[0034] Cooling box 3: Located on the right side of the extruder body 1, it contains cooling water and is used to cool and solidify the extruded high-temperature strip.

[0035] Mounting plate 4: There are two in total. They are fixed on the right end of the upper surface of the cooling box 3 and are used to install the second guide rod 15 to help guide the cooled material strip into the subsequent process.

[0036] L-shaped plate 5: threadedly mounted on threaded rod 7, sliding in contact with the lower inner wall of cooling box 3, moving under the drive of threaded rod, pushing the sediment;

[0037] Triangular plate 6: Fixed to the lower left surface of the horizontal plate of L-shaped plate 5, it enhances the pushing effect and concentrates the sediment to guide the water outlet pipe 8;

[0038] Threaded rod 7: Rotatably installed on the left and right inner walls of the cooling box 3, driven to rotate by the second motor 14, which drives the L-shaped plate 5 to move horizontally to clean impurities;

[0039] Water outlet pipe 8: Fixed to the left end of the rear surface of cooling box 3, used to discharge sewage and sediment during cleaning, and connected to a high-pressure water gun for rinsing;

[0040] First guide rod 9: There are two in total. They are rotatably installed on the inner wall of the cooling box 3 and driven by the first motor 13. They guide the material strip to cool in the cooling box 3 along a specific path.

[0041] Cover 10: It is slidably sleeved at the rear end of the water outlet pipe 8 to seal the pipe when not being cleaned;

[0042] Fixed screw 11: Threaded onto the cover 10, it extends into the water outlet pipe 8 and is used with the handle 12 to fix or remove the cover 10;

[0043] Turbo 12: Fixed to the upper end of the fixing screw 11, making it easy for the operator to turn the fixing screw 11 to operate the opening and closing of the cover 10;

[0044] First motor 13: Fixed to the rear surface of cooling box 3, drives first guide rod 9 to rotate, and controls the movement trajectory of material strip in cooling box 3;

[0045] Second motor 14: Fixed on the right surface of cooling box 3, drives threaded rod 7 to rotate, and drives auxiliary cleaning mechanism to clean up sediment;

[0046] Second guide rod 15: Installed between two mounting plates 4, driven by third motor 16, to guide the cooled strip into the pelletizing process;

[0047] The third motor 16 is fixed to the rear surface of the rear mounting plate 4 and drives the second guide rod 15 to rotate, ensuring stable transmission of the material strip.

[0048] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cooling device for plastic granulation production, comprising a cooling box (3), an extruder body (1) placed on the left side of the cooling box (3), and an extrusion die (2) fixedly installed on the right end of the extruder body (1), characterized in that: Two mounting plates (4) are fixedly installed on the right end of the upper surface of the cooling box (3); An auxiliary cleaning mechanism is installed on the cooling box (3). The auxiliary cleaning mechanism includes an L-shaped plate (5) and a triangular plate (6). Threaded rods (7) are rotatably installed on the left and right inner walls of the cooling box (3). The L-shaped plate (5) is threaded onto the outer surface of the threaded rod (7). The horizontal plate of the L-shaped plate (5) slides in contact with the lower inner wall of the cooling box (3). The triangular plate (6) is fixedly installed on the lower end of the left surface of the horizontal plate of the L-shaped plate (5). A water outlet pipe (8) is fixedly installed on the left end of the rear surface of the cooling box (3). The front end of the water outlet pipe (8) extends into the interior of the cooling box (3). Two first guide rods (9) are rotatably installed on the rear inner wall of the cooling box (3).

2. The cooling device for plastic granulation production according to claim 1, characterized in that: The auxiliary cleaning mechanism also includes a cover (10), which is slidably sleeved on the rear end of the water outlet pipe (8).

3. A cooling device for plastic granulation production according to claim 2, characterized in that: The upper surface of the cover (10) is threaded with a fixing screw (11), the lower end of the fixing screw (11) is threaded through the water outlet pipe (8), and the upper end of the fixing screw (11) is fixedly installed with a throttle (12).

4. A cooling device for plastic granulation production according to claim 1, characterized in that: On the rear surface of the cooling box (3), a first motor (13) is fixedly installed at the position corresponding to the two first guide rods (9). The output ends of the two first motors (13) rotate through into the interior of the cooling box (3). The two first motors (13) are fixedly connected to the two first guide rods (9) respectively.

5. A cooling device for plastic granulation production according to claim 1, characterized in that: A second motor (14) is fixedly installed on the right surface of the cooling box (3). The output end of the second motor (14) rotates through the interior of the cooling box (3). The second motor (14) is fixedly connected to the threaded rod (7).

6. A cooling device for plastic granulation production according to claim 1, characterized in that: The two mounting plates (4) are rotatably mounted with a second guide rod (15) on their adjacent surfaces. The rear surface of the rear mounting plate (4) is fixedly mounted with a third motor (16). The output end of the third motor (16) rotatably extends through to the rear end of the second guide rod (15). The third motor (16) is fixedly connected to the second guide rod (15).

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