Underwater pellet cutting twin screw extruder unit

Abstract

The utility model relates to the production and manufacturing technology field of master batch, disclose underwater pelletizing double screw extruder unit, including base, the top fixedly connected with bottom shell of base, the top rotationally connected with top shell of bottom shell, the outside fixedly connected with extrusion disc of bottom shell, the outside fixedly connected with pelletizing shell of extrusion disc, the inside rotationally connected with rotating rod of pelletizing shell, the outside inside slip connection has the dismounting mechanism of rotating rod, the dismounting mechanism includes long lever, the outside slip connection of long lever is in the inside of rotating rod, the inside slip connection has pull plate of rotating rod, in the utility model, through external force pull plate, drive long lever, slide plate action, remove the fixed of pelletizing component, install when spring elastic force push part reset fixed, can be convenient for the quick dismounting of pelletizing component, benefit maintenance and replace cutter, promote the efficiency that unit maintains cutter.

Description

Technical Field

[0001] This utility model relates to the field of masterbatch production and manufacturing technology, and in particular to underwater pelletizing twin-screw extruders. Background Technology

[0002] In today's rapidly developing manufacturing environment, industries such as polymer material processing and plastic modification have an increasingly urgent need for efficient, precise, and environmentally friendly processing equipment. As the global emphasis on resource recycling and green production deepens, traditional extrusion granulation equipment is gradually revealing its limitations in terms of production efficiency, granule quality, and environmental performance.

[0003] With its unique working principle, the underwater pelletizing twin-screw extruder can extrude materials in a high-temperature molten state and immediately achieve rapid cooling and cutting through an underwater pelletizing mechanism. It can not only produce products with uniform particles and excellent appearance, but also effectively reduce dust pollution in the production process. It is in line with the trend of sustainable development in modern industry and has become one of the key equipment in the field of polymer material processing. It has been widely used and promoted in many industries such as chemical, plastics, and rubber.

[0004] In existing technologies, the connection structure between the cutter and the unit in some units is quite complex. It often requires the use of various special tools and multiple disassembly steps to remove the cutter. This not only consumes a lot of manpower and time, but also seriously reduces the maintenance efficiency of the equipment. Therefore, an underwater pelletizing twin-screw extruder is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an underwater pelletizing twin-screw extruder unit, which aims to improve the problem that some existing units have difficulty in quickly disassembling the cutting tools.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An underwater pelletizing twin-screw extruder unit includes a base, a bottom shell fixedly connected to the top of the base, a top shell rotatably connected to the top of the bottom shell, an extrusion disc fixedly connected to the outside of the bottom shell, a pelletizing shell fixedly connected to the outside of the extrusion disc, a rotating rod rotatably connected to the inside of the pelletizing shell, a disassembly mechanism slidably connected to the outside and inside of the rotating rod, and a locking mechanism fixedly connected to the outside of the top shell.

[0008] The disassembly mechanism includes a long rod, the outside of which is slidably connected to the inside of a rotating rod. A pull plate is slidably connected to the inside of the rotating rod. The outside of the long rod is fixedly connected to the outside of the pull plate. A spring is fixedly connected to the inside of the rotating rod. The outside of the spring is fixedly connected to one side of the pull plate. A slide plate is slidably connected to the inside of the rotating rod. The bottom of the slide plate is slidably connected to the outside of the long rod. A pelletizing assembly is slidably connected to the outside of the rotating rod.

[0009] As a further description of the above technical solution:

[0010] The locking mechanism includes an L-shaped connecting plate, the outside of which is fixedly connected to the outside of the top shell, and a fixing seat is fixedly connected to the outside of the bottom shell. The outside of the L-shaped connecting plate is slidably connected to the inside of the fixing seat, and a plug rod is slidably connected to the inside of the fixing seat. The outside of the plug rod is slidably connected to the inside of the L-shaped connecting plate.

[0011] As a further description of the above technical solution:

[0012] The pelletizing assembly includes a disc, the interior of which is slidably connected to the exterior of the rotating rod, the exterior of which is slidably connected to the interior of the disc, and a pelletizing cutter fixedly connected to the exterior of the disc, the exterior of which is slidably connected to the exterior of the extrusion disc.

[0013] As a further description of the above technical solution:

[0014] The top of the pelletizing shell is fixedly connected to a discharge pipe, and the bottom of the pelletizing shell is fixedly connected to a water inlet pipe, with a water pump installed inside the water inlet pipe.

[0015] As a further description of the above technical solution:

[0016] The pellet shell is fixedly connected to the outside of a support, and a motor is fixedly connected to the inside of the support. The drive end of the motor is fixedly connected to the outside of the rotating rod.

[0017] As a further description of the above technical solution:

[0018] The main feeder and the side feeder are fixedly connected to the inner top side of the top shell, and the bottom shell and the top shell are rotatably connected to an auger one and an auger two on the adjacent side.

[0019] As a further description of the above technical solution:

[0020] The bottom shell is rotatably connected to a drive gear, and the top of the base is fixedly connected to a motor.

[0021] As a further description of the above technical solution:

[0022] The drive end of the second motor is fixedly connected to the outside of the drive gear. The first auger is meshed with the drive gear, and the second auger is meshed with the drive gear.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, by pulling the pull plate with external force, the long rod and the sliding plate are driven to move, thereby releasing the fixing of the pelletizing assembly. During installation, the spring force pushes the component to reset and fix it, which can facilitate the quick disassembly and assembly of the pelletizing assembly, facilitate the maintenance and replacement of the blades, and improve the efficiency of the unit in maintaining the blades.

[0025] 2. In this utility model, by pulling the insert rod, the L-shaped connecting plate is driven to cooperate with the fixed base. When the top shell needs to be opened, the insert rod is pulled out to unlock, and after closing, the insert rod is inserted to lock. This enables the quick opening and closing of the top shell and bottom shell, which is convenient for internal maintenance and cleaning. After locking, the equipment operation is sealed, improving the convenience of operation and maintenance and the stability of operation. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of the underwater pelletizing twin-screw extruder unit proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the main feeder of the underwater pelletizing twin-screw extruder unit proposed in this utility model;

[0028] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0030] Figure 5 This is a schematic diagram of the auger of the underwater pelletizing twin-screw extruder unit proposed in this utility model.

[0031] Legend:

[0032] 1. Base; 2. Bottom shell; 3. Top shell; 4. Extrusion disc; 5. Pelletizing shell; 6. Rotating rod; 7. Long rod; 8. Pull plate; 9. Spring; 10. Slide plate; 11. Disc; 12. Pelletizing blade; 13. L-shaped connecting plate; 14. Fixed base; 15. Insert rod; 16. Discharge pipe; 17. Water inlet pipe; 18. Water pump; 19. Support; 20. Motor 1; 21. Main feeder; 22. Side feeder; 23. Screwdriver 1; 24. Screwdriver 2; 25. Drive gear; 26. Motor 2. Detailed Implementation

[0033] 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.

[0034] Reference Figures 1 to 3 This utility model provides an embodiment of an underwater pelletizing twin-screw extruder unit, including a base 1, which is the basic support component of the entire unit. A bottom shell 2 is fixedly connected to the top of the base 1. The shape of the bottom shell 2 is usually adapted to the top shell 3, together forming a cavity space for material conveying and processing. A top shell 3 is rotatably connected to the top of the bottom shell 2. The top shell 3 and the bottom shell 2 cooperate to form a closed space for material processing. An extrusion disc 4 is fixedly connected to the outside of the bottom shell 2. The processed and plasticized material is extruded from the holes of the extrusion disc 4 to form a continuous material strip. A pelletizing shell 5 is fixedly connected to the outside of the extrusion disc 4. The pelletizing shell 5 forms a closed space for pelletizing work and provides environmental support for the pelletizing process. A rotating rod 6 is rotatably connected inside the pelletizing shell 5. The rotating rod 6 is used to drive the pelletizing assembly to rotate to realize the pelletizing action. A disassembly mechanism is slidably connected to the outside and inside of the rotating rod 6. A locking mechanism is fixedly connected to the outside of the top shell 3.

[0035] The disassembly mechanism includes a long rod 7, which serves as a connection and transmission mechanism. The outside of the long rod 7 is slidably connected to the inside of the rotating rod 6. The inside of the rotating rod 6 is slidably connected to a pull plate 8, which is used to drive the long rod 7 to slide. The outside of the long rod 7 is fixedly connected to the outside of the pull plate 8. The inside of the rotating rod 6 is fixedly connected to a spring 9. When the pelletizing assembly is installed, the spring 9 is in a compressed state. The elastic force keeps the pull plate 8, the long rod 7, and the slide plate 10 fixed to the pelletizing assembly. When the pelletizing assembly is disassembled, the external force causes the pull plate 8 to move and compress the spring 9, storing elastic potential energy. After disassembly, each component can return to its initial position under the elastic force of the spring 9. The outside of the spring 9 is fixedly connected to the outside of the pull plate 8. The inside of the rotating rod 6 is slidably connected to a slide plate 10. Driven by the long rod 7, the slide plate 10 is inserted into the corresponding slot inside the disc 11 to achieve circumferential fixation of the pelletizing assembly. The bottom of the slide plate 10 is slidably connected to the outside of the long rod 7. The outside of the rotating rod 6 is slidably connected to the pelletizing assembly.

[0036] The pelletizing assembly includes a disc 11, which serves as the mounting carrier for the pelletizing cutter 12. The inside of the disc 11 is slidably connected to the outside of the rotating rod 6, and the outside of the slide plate 10 is slidably connected to the inside of the disc 11. The pelletizing cutter 12 is fixedly connected to the outside of the disc 11. The pelletizing cutter 12 is a key component for cutting materials into pellets, and the outside of the pelletizing cutter 12 is slidably connected to the outside of the extrusion disc 4.

[0037] Reference Figure 1 , Figure 2 and Figure 4 The locking mechanism includes an L-shaped connecting plate 13. The L-shaped connecting plate 13 is L-shaped to facilitate its cooperation with the fixed seat 14 to lock the top shell 3 and the bottom shell 2. The L-shaped connecting plate 13 is fixedly connected to the outside of the top shell 3. The fixed seat 14 is fixedly connected to the outside of the bottom shell 2. The inside of the fixed seat 14 is used to accommodate the L-shaped connecting plate 13 and the insert rod 15 to achieve the locking function of the top shell 3. The outside of the L-shaped connecting plate 13 is slidably connected to the inside of the fixed seat 14. The insert rod 15 is slidably connected to the inside of the fixed seat 14. The insert rod 15 plays the role of locking the L-shaped connecting plate 13 and the fixed seat 14, thereby achieving the locking of the top shell 3 and the bottom shell 2. The outside of the insert rod 15 is slidably connected to the inside of the L-shaped connecting plate 13.

[0038] Reference Figure 1 , Figure 2 and Figure 5 The top of the pelletizing shell 5 is fixedly connected to a discharge pipe 16, which is used to discharge the mixture of finished pellets and cooling water after pelleting. The bottom of the pelletizing shell 5 is fixedly connected to a water inlet pipe 17, which is used to introduce cooling water into the pelletizing shell 5 to transport the finished pellets after pelleting. The flow of water is used to discharge the pellets from the discharge pipe 16. A water pump 18 is installed inside the water inlet pipe 17 to provide power for the water to flow through the water inlet pipe 17 and the pelletizing shell 5. A support 19 is fixedly connected to the outside of the pelletizing shell 5 to fix a motor 20, providing installation support and positioning for the motor 20. The motor 20 is fixedly connected inside the support 19 to provide power for the rotation of the pelletizing assembly. The drive end of the motor 20 is fixedly connected to the outside of the rotating rod 6. The main feeder 21 and the side feeder 22 are fixedly connected to the top side of the inside of the top shell 3. The main feeder 21 is used to transport the main materials into the cavity formed by the top shell 3 and the bottom shell 2 at a certain flow rate and speed. The side feeder 22 is mainly used to add some auxiliary materials to the unit. The bottom shell 2 and the top shell 3 are rotatably connected to an auger 1 23 and an auger 24 on the adjacent side. The auger 1 23 and the auger 24 are the main components for material conveying, mixing and plasticizing. The bottom shell 2 is rotatably connected to a drive gear 25. The drive gear 25 meshes with both the auger 1 23 and the auger 24 to drive the auger 1 23 and the auger 24 to rotate. The top of the base 1 is fixedly connected to a motor 26. The motor 26 is used to drive the insertion rod 15 to rotate. The drive end of the motor 26 is fixedly connected to the outside of the drive gear 25. The auger 1 23 and the drive gear 25 are meshed with each other. The auger 24 and the drive gear 25 are meshed with each other.

[0039] Working principle: First, the main feeder 21 delivers the main material to the cavity formed by the top shell 3 and the bottom shell 2 according to the set flow rate and speed. The side feeder 22 adds auxiliary material to the cavity. Then, the second motor 26 starts and drives the drive gear 25 to rotate. Since the drive gear 25 meshes with the first auger 23 and the second auger 24 respectively, the first auger 23 and the second auger 24 rotate accordingly. During the rotation, the material in the cavity is pushed forward by the action of the first auger 23 and the second auger 24, and the material is mixed and plasticized at the same time. The processed material continues to move forward and is finally extruded from the hole of the extrusion disc 4 to form a continuous material strip.

[0040] At the same time, the water pump 18 starts and delivers cooling water to the inside of the pelletizing shell 5 through the water inlet pipe 17 to provide a cooling environment for the pelletizing process. The motor 20 on the support 19 starts and drives the rotating rod 6 to rotate. The rotating rod 6 then drives the disc 11 and the pelletizing cutter 12 in the pelletizing assembly to rotate. The rotating pelletizing cutter 12 contacts the outside of the extrusion disc 4 and cuts the extruded material strip into granules. The granules produced by cutting are mixed with the cooling water and discharged through the discharge pipe 16 at the top of the pelletizing shell 5 under the drive of the water flow.

[0041] When maintaining or replacing the pelletizing assembly, the pull plate 8 is pulled by external force. The pull plate 8 causes the long rod 7 to slide, and the slide plate 10, no longer restricted by the long rod 7, exits from the slot of the disc 11. The pull plate 8 compresses the spring 9, releasing the fixing of the pelletizing assembly. After maintaining the pelletizing blade 12, the rotating rod 6 is inserted into the disc 11, and the pull plate 8 is released. The spring 9 returns to its original deformation and generates elastic force, which pushes the pull plate 8, the long rod 7, and the slide plate 10 back to their original positions, re-fixing the pelletizing assembly. When it is necessary to open the top shell 3 to maintain and clean the internal components, the insert rod 15 in the fixing seat 14 is pulled out to release the lock on the L-shaped connecting plate 13. The top shell 3 can then be rotated to separate it from the bottom shell 2. After maintenance and cleaning, the top shell 3 is rotated to close it with the bottom shell 2. The L-shaped connecting plate 13 is inserted into the fixing seat 14, and the insert rod 15 is then inserted into the L-shaped connecting plate 13 and the fixing seat 14 to lock the top shell 3 and the bottom shell 2, ensuring the sealing during normal operation of the equipment.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An underwater pelletizing twin-screw extruder unit, comprising a base (1), characterized in that: The base (1) is fixedly connected to the top of the bottom shell (2), the bottom shell (2) is rotatably connected to the top of the top shell (3), the bottom shell (2) is fixedly connected to the outside of the extrusion disc (4), the extrusion disc (4) is fixedly connected to the outside of the pelletizing shell (5), the pelletizing shell (5) is rotatably connected to the inside of the pelletizing shell (5), the outside of the rotating rod (6) is slidably connected to the inside of the rotating rod (6), and the top shell (3) is fixedly connected to the outside of the top shell (3). The disassembly mechanism includes a long rod (7), the outside of which is slidably connected to the inside of the rotating rod (6). A pull plate (8) is slidably connected inside the rotating rod (6). The outside of the long rod (7) is fixedly connected to the outside of the pull plate (8). A spring (9) is fixedly connected inside the rotating rod (6). The outside of the spring (9) is fixedly connected to one side of the pull plate (8). A sliding plate (10) is slidably connected inside the rotating rod (6). The bottom of the sliding plate (10) is slidably connected to the outside of the long rod (7). A pelletizing assembly is slidably connected to the outside of the rotating rod (6).

2. The underwater pelletizing twin-screw extruder unit according to claim 1, characterized in that: The locking mechanism includes an L-shaped connecting plate (13), which is fixedly connected to the outside of the top shell (3). A fixing seat (14) is fixedly connected to the outside of the bottom shell (2). The L-shaped connecting plate (13) is slidably connected to the inside of the fixing seat (14). A plug rod (15) is slidably connected to the inside of the fixing seat (14). The plug rod (15) is slidably connected to the inside of the L-shaped connecting plate (13).

3. The underwater pelletizing twin-screw extruder unit according to claim 1, characterized in that: The pelletizing assembly includes a disc (11), the inside of which is slidably connected to the outside of the rotating rod (6), the outside of which is slidably connected to the inside of the disc (11), and a pelletizing cutter (12) is fixedly connected to the outside of the disc (11), the outside of which is slidably connected to the outside of the extrusion disc (4).

4. The underwater pelletizing twin-screw extruder unit according to claim 1, characterized in that: The top of the pelletizing shell (5) is fixedly connected to a discharge pipe (16), and the bottom of the pelletizing shell (5) is fixedly connected to a water inlet pipe (17). A water pump (18) is installed inside the water inlet pipe (17).

5. The underwater pelletizing twin-screw extruder unit according to claim 1, characterized in that: The pellet shell (5) is fixedly connected to a support (19) on the outside, and a motor (20) is fixedly connected inside the support (19). The drive end of the motor (20) is fixedly connected to the outside of the rotating rod (6).

6. The underwater pelletizing twin-screw extruder unit according to claim 1, characterized in that: The main feeder (21) and the side feeder (22) are fixedly connected to the top side inside the top shell (3), and the bottom shell (2) and the top shell (3) are rotatably connected to the adjacent side of the top shell (3) and the auger one (23) and the auger two (24).

7. The underwater pelletizing twin-screw extruder unit according to claim 6, characterized in that: The bottom shell (2) is rotatably connected to a drive gear (25), and the top of the base (1) is fixedly connected to a motor (26).

8. The underwater pelletizing twin-screw extruder unit according to claim 7, characterized in that: The drive end of the second motor (26) is fixedly connected to the outside of the drive gear (25). The first auger (23) is meshed with the drive gear (25), and the second auger (24) is meshed with the drive gear (25).

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