Double-screw plastic granule extruder

Abstract

The utility model relates to the technical field of double-screw extruders, in particular to a double-screw plastic granule extruder, which comprises a base, a driving mechanism and a support, the driving mechanism and the support are mounted on the base, a feeding mechanism is mounted on the support and connected with the driving mechanism, the feeding mechanism comprises a barrel, the barrel is arranged on the support, and the driving mechanism is connected with the barrel. A feeding port and a filtering mechanism are arranged on each barrel, a plurality of barrels are located on the support and are fixed through screws, cooling cavities are formed in the inner walls of the barrels, one end of each cooling cavity is connected with a first flow dividing pipe, drainage pipes are installed on two installation bases on the other side of the support, and the drainage pipes are connected with a second flow dividing pipe. A plurality of second flow dividing pipes are installed on the drainage pipe at equal intervals, and the other ends of the multiple cooling cavities are each connected with a second flow dividing pipe. The barrel is divided into a plurality of sections, and the cooling mechanisms are independently arranged on the sections of the barrel, so that the temperature of the single barrel can be controlled, the barrels at different positions can be independently cooled according to cooling requirements, and the product efficiency is improved.

Description

Technical Field

[0001] This utility model relates to an extruder, specifically a twin-screw plastic granule extruder, belonging to the technical field of twin-screw extruders. Background Technology

[0002] A twin-screw plastic granule extruder is a device that uses two meshing screws rotating inside a barrel to convey, compress, plasticize, mix, and extrude plastic raw materials. It is widely used in the plastics processing industry. When the screws rotate in opposite directions, it is suitable for profile extrusion (such as PVC pipes), with a lower screw speed (about 10 r / min) and high conveying stability. When the screws rotate in the same direction, it is used for compounding, degassing, or chemical reactions, with a higher screw speed (300-600 r / min) and better mixing effect.

[0003] However, current twin-screw plastic granule extruders operate inside the barrel. Material is fed into the barrel, where co-rotating screws transport the material. The outer wall of the barrel has a heating mechanism to melt the plastic granules, while the inner wall has a water cooling mechanism to lower the barrel temperature. Currently, the barrel is typically a single piece, and the cooling mechanism penetrates the entire inner wall for cooling. Since the barrel is not divided into multiple sections, the temperature reduction is uniform. Because different sections of the barrel have different cooling requirements, and the barrel is a single piece, the cooling mechanism cannot effectively cool different sections according to their specific needs. Utility Model Content

[0004] The purpose of this invention is to provide a twin-screw plastic granule extruder to solve the above problems. By dividing the cylinder into multiple sections, and each section is equipped with a separate cooling mechanism, the temperature of a single cylinder can be controlled. This allows for individual cooling of cylinders at different locations according to cooling requirements, thereby improving product efficiency.

[0005] This utility model achieves the above-mentioned objectives through the following technical solution: a twin-screw plastic granule extruder includes a base and a drive mechanism and a support mounted on the base. A feeding mechanism is mounted on the support and connected to the drive mechanism. The feeding mechanism includes a cylinder. The support has a cylinder with a feed inlet and a filter mechanism. Multiple cylinders are located on the support and are fixed together by screws. A cooling mechanism is mounted on the support and includes two sets of mounting seats. Two sets of mounting seats are mounted opposite each other on both sides of the support. A water inlet pipe is fixedly connected to the two mounting seats on one side of the support. Multiple diverter pipes are equidistantly connected to the water inlet pipe. Cooling chambers are formed in the inner walls of the multiple cylinders. One end of each cooling chamber is connected to a diverter pipe. A drain pipe is mounted on the two mounting seats on the other side of the support. Multiple diverter pipes are equidistantly installed on the drain pipe. The other end of each cooling chamber is connected to a diverter pipe.

[0006] Preferably, the first diversion pipe and the second diversion pipe are arranged correspondingly, and the inlet pipe and the outlet pipe are arranged in parallel.

[0007] Preferably, the cross-section of the cylinder is I-shaped, and the cooling cavity on the cylinder is U-shaped.

[0008] Preferably, the feeding mechanism further includes screws, and two screws mesh inside the plurality of cylinders.

[0009] Preferably, the drive mechanism includes a drive component, which is mounted on the base. A gearbox is mounted on the base, and the gearbox is connected to the output end of the drive component. Two couplings are mounted on one end of the gearbox, and the output ends of the two couplings are respectively fixedly connected to two screws.

[0010] Preferably, the filtering mechanism includes a slide rail, a slide rail is installed on the cylinder opposite to the end of the drive component, a slide plate is slidably connected to the slide rail, two filter screens are installed on the slide plate, a shaft seat is fixedly connected to one side of the slide plate, a drive component is installed on the slide rail, a ball head is fixedly connected to the telescopic end of the drive component, the ball head is rotatably connected to the inside of the shaft seat, and a hopper is installed on the side wall of the slide rail.

[0011] Preferably, a protective cover is placed on each of the multiple cylinders, and the protective cover has an inverted U-shaped structure.

[0012] Preferably, each of the two cylinders has a reserved opening and an exhaust port, and the reserved opening and exhaust port penetrate the protective cover.

[0013] The beneficial effects of this utility model are: opening the water source of the inlet pipe allows cooling water to flow into the first branch pipe through the inlet pipe, then into the cooling chamber of each cylinder, and finally out through the second branch pipe and discharged through the drain pipe, ensuring the normal operation of the cooling system and providing a good cooling effect for the cylinder. Due to the separate setting of the cylinder, one cylinder, one branch pipe and one branch pipe constitute a cooling unit, which can be cooled separately according to the needs of each section of the cylinder, improving product quality and facilitating cylinder replacement. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the connection structure of the cylinder, screw and bracket of this utility model;

[0016] Figure 3 This is a schematic diagram of the connection structure of the cylinder, feed inlet and exhaust port of this utility model;

[0017] Figure 4 This is a schematic diagram of the connection structure of the cylinder and cooling cavity of this utility model.

[0018] In the diagram: 1. Base; 2. Drive mechanism; 201. Drive component one; 202. Gearbox; 203. Coupling; 3. Bracket; 4. Feeding mechanism; 401. Cylinder; 402. Screw; 5. Cooling mechanism; 501. Water inlet pipe; 502. Diverter pipe one; 503. Mounting seat; 504. Drain pipe; 505. Diverter pipe two; 506. Cooling chamber; 6. Protective cover; 7. Filtering mechanism; 701. Slide rail; 702. Slide plate; 703. Filter screen; 704. Drive component two; 705. Hopper; 706. Ball head; 707. Shaft seat; 8. Reserved opening; 9. Exhaust port; 10. Feed inlet. Detailed Implementation

[0019] 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.

[0020] Please see Figures 1-4As shown, a twin-screw plastic granule extruder includes a base 1 and a drive mechanism 2 and a support 3 mounted on the base 1. A feeding mechanism 4 is mounted on the support 3 and is connected to the drive mechanism 2. The feeding mechanism 4 includes a cylinder 401. The support 3 has cylinders 401 with a feed inlet 10 and a filter mechanism 7. Multiple cylinders 401 are located on the support 3 and are fixed together by screws. A cooling mechanism 5 is mounted on the support 3 and includes two sets of mounting seats 503. The two sides of the support 3 are connected... The bracket 3 is equipped with two sets of mounting bases 503. Water inlet pipes 501 are fixedly connected to the two mounting bases 503 on one side of the bracket 3. Multiple diversion pipes 502 are equidistantly connected to the water inlet pipes 501. Cooling chambers 506 are opened on the inner walls of multiple cylinders 401. One end of each cooling chamber 506 is connected to a diversion pipe 502. Drain pipes 504 are installed on the two mounting bases 503 on the other side of the bracket 3. Multiple diversion pipes 505 are equidistantly installed on the drain pipes 504. The other end of each cooling chamber 506 is connected to a diversion pipe 505.

[0021] As a technical optimization of this utility model, the first diversion pipe 502 and the second diversion pipe 505 are arranged correspondingly, and the water inlet pipe 501 and the drain pipe 504 are arranged in parallel, so that a cooling unit of a cylinder 401 is formed by a first diversion pipe 502, a cooling chamber 506 and a second diversion pipe 505.

[0022] As a technical optimization of this utility model, the cross-section of the cylinder 401 is I-shaped, and the cooling cavity 506 on the cylinder 401 is inverted U-shaped, which facilitates the installation of multiple cylinders 401.

[0023] As a technical optimization of this utility model, the feeding mechanism 4 also includes a screw 402. Two screws 402 mesh inside the multiple cylinders 401, and the synchronous movement of the two screws 402 realizes the transportation of materials.

[0024] As a technical optimization of this utility model, the drive mechanism 2 includes a drive component 201, which is mounted on a base 1. A gearbox 202 is also mounted on the base 1. The gearbox 202 is connected to the output end of the drive component 201. Two couplings 203 are mounted on one end of the gearbox 202. The output ends of the two couplings 203 are fixedly connected to two screws 402 respectively, so as to start the drive component 201. The drive component 201 is a motor that drives the two screws 402 to rotate.

[0025] As a technical optimization of this utility model, the filter mechanism 7 includes a slide rail 701. The slide rail 701 is installed on the cylinder 401 opposite to the drive component 201. A slide plate 702 is slidably connected to the slide rail 701. Two filter screens 703 are installed on the slide plate 702. A bearing seat 707 is fixedly connected to one side of the slide plate 702. A drive component 704 is installed on the slide rail 701. A ball head 706 is fixedly connected to the telescopic end of the drive component 704. The ball head 706 is rotatably connected to the inside of the bearing seat 707. A hopper 705 is installed on the side wall of the slide rail 701 to filter metal debris in the extruded material. The slide plate 702 is pulled out by the telescopic movement of the drive component 704, which facilitates the replacement of the filter screens 703.

[0026] As a technical optimization of this utility model, a protective cover 6 is placed on each of the multiple cylinders 401. The protective cover 6 has an inverted U-shaped structure, which improves the heat preservation effect and avoids burns.

[0027] As a technical optimization of this utility model, the two cylinders 401 are respectively provided with a reserved port 8 and an exhaust port 9. The reserved port 8 and the exhaust port 9 penetrate the protective cover 6, so that different materials can be added from the reserved port 8 and discharged from the exhaust port 9 during operation.

[0028] When using this utility model, firstly, before starting the equipment, carefully check whether each component, such as the base 1, drive mechanism 2, bracket 3, feeding mechanism 4, cooling mechanism 5, and filter mechanism 7, is securely installed and free from looseness or damage. Ensure that the water inlet pipe 501 and drain pipe 504 are tightly connected without leakage, and that the connections of each branch pipe 1 502 and branch pipe 2 505 to the cooling chamber 506 are normal. Simultaneously check whether the protective cover 6 is correctly placed on the cylinder 401, and whether the reserved port 8 and exhaust port 9 are unobstructed. Install the slide rail 701 on the cylinder 401 away from the drive component 1 201, and slide the slide plate 702 onto the slide rail 701, ensuring that the slide plate 702 can slide smoothly. Install the two filter screens 703 onto the slide plate 702. Before installation, ensure the filter screen 703 is securely installed without tilting or loosening. Fix the bearing seat 707 to one side of the slide plate 702, allowing the ball head 706 at the telescopic end of the drive component 704 to rotate smoothly and connect to the inside of the bearing seat 707. Then, first open the water supply to the inlet pipe 501, allowing cooling water to flow through the inlet pipe 501 into the first branch pipe 502, then into the cooling chambers 506 of each cylinder 401, and finally out through the second branch pipe 505 and drain through the drain pipe 504. This ensures the cooling system operates normally, providing good cooling for the cylinder 401. Due to the individual setup of each cylinder 401, one cylinder 401, one first branch pipe 502, and one second branch pipe 505 constitute a cooling unit, which can be configured according to the needs of each section of cylinder 401. To achieve independent cooling, improve product quality, and facilitate the replacement of cylinder 401, drive component 201 is activated. Drive component 201 is a motor that drives gearbox 202. Gearbox 202 transmits power to two screws 402 via two couplings 203, causing them to rotate synchronously and providing power for material conveying. Material is added through inlet 10, and the outer wall of cylinder 401 is heated to melt and convey the material. For some special materials, they can be added through reserved port 8 as needed to meet different production requirements. After heating and other processing, the material gradually melts and is extruded from the front end of cylinder 401. The extruded material passes through filter screen 703, which removes metal fragments and other impurities, ensuring the quality of the extruded plastic. Regarding the quality of the granules, during the extrusion process, any gases or volatile substances that may be present in the material will be discharged from the exhaust port 9 to avoid affecting the quality and performance of the plastic granules. After the filter screen 703 has been used for a period of time, the filtration effect may decrease and it needs to be replaced. At this time, the second drive component 704 is started. The second drive component 704 is a cylinder. The telescopic end of the second drive component 704 drives the ball head 706 to move. The ball head 706 pulls the slide plate 702 to slide on the slide rail 701 through the bearing 707, pulling out the slide plate 702. The old filter screen 703 is exposed, and the new filter screen 703 slides off the slide plate 702 to replace it, realizing the replacement of the filter screen without stopping the machine. Alternatively, the exposed filter screen 703 can be disassembled and replaced. When it needs to be replaced again, the slide plate 702 can be pushed to quickly replace it.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A twin-screw plastic pellet extruder, comprising a base (1) and a drive mechanism (2) and a support (3) mounted on the base (1), wherein a feeding mechanism (4) is mounted on the support (3), the feeding mechanism (4) is connected to the drive mechanism (2), the feeding mechanism (4) includes a cylinder (401), the cylinder (401) is provided on the support (3), and the cylinder (401) is provided with a feed inlet (10) and a filter mechanism (7), characterized in that: Multiple cylinders (401) are provided on the support (3), and the multiple cylinders (401) are fixed together by screws. A cooling mechanism (5) is installed on the support (3). The cooling mechanism (5) includes two sets of mounting seats (503). Two sets of mounting seats (503) are installed opposite each other on both sides of the support (3). Water inlet pipes (501) are fixedly connected to the two mounting seats (503) on one side of the support (3). Multiple cylinders (401) are connected at equal intervals on the water inlet pipes (501). Each of the multiple cylinders (401) has a first-level branch pipe (502) and a cooling chamber (506) is provided on the inner wall of each of the multiple cylinders (401). One end of each cooling chamber (506) is connected to a first-level branch pipe (502). Drain pipes (504) are installed on two mounting seats (503) on the other side of the bracket (3). Multiple second-level branch pipes (505) are installed on the drain pipes (504) at equal intervals. The other end of each of the multiple cooling chambers (506) is connected to a second-level branch pipe (505).

2. The twin-screw plastic granule extruder according to claim 1, characterized in that: The first diversion pipe (502) and the second diversion pipe (505) are respectively arranged, and the inlet pipe (501) and the outlet pipe (504) are arranged in parallel.

3. The twin-screw plastic granule extruder according to claim 1, characterized in that: The cross-section of the cylinder (401) is I-shaped, and the cooling cavity (506) on the cylinder (401) is inverted U-shaped.

4. The twin-screw plastic granule extruder according to claim 1, characterized in that: The feeding mechanism (4) also includes screws (402), and two screws (402) mesh inside the plurality of cylinders (401).

5. A twin-screw plastic granule extruder according to claim 4, characterized in that: The drive mechanism (2) includes a drive component (201), the drive component (201) is mounted on the base (1), the gearbox (202) is mounted on the base (1), the gearbox (202) is connected to the output end of the drive component (201), and two couplings (203) are mounted on one end of the gearbox (202). The output ends of the two couplings (203) are respectively fixedly connected to two screws (402).

6. A twin-screw plastic granule extruder according to claim 5, characterized in that: The filtering mechanism (7) includes a slide rail (701). The slide rail (701) is mounted on the cylinder (401) away from the drive component (201). A slide plate (702) is slidably connected to the slide rail (701). Two filter screens (703) are mounted on the slide plate (702). A bearing seat (707) is fixedly connected to one side of the slide plate (702). A drive component (704) is mounted on the slide rail (701). A ball head (706) is fixedly connected to the telescopic end of the drive component (704). The ball head (706) is rotatably connected to the inside of the bearing seat (707). A hopper (705) is mounted on the side wall of the slide rail (701).

7. A twin-screw plastic granule extruder according to claim 1, characterized in that: Each of the multiple cylindrical bodies (401) is provided with a protective cover (6), which is in the shape of an inverted U-shape.

8. A twin-screw plastic granule extruder according to claim 1, characterized in that: Two of the cylinders (401) are respectively provided with a reserved opening (8) and an exhaust port (9), and the reserved opening (8) and the exhaust port (9) penetrate the protective cover (6).

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