Novel efficient plastic extruder barrel screw

Abstract

The utility model discloses a novel efficient plastic extruder barrel screw rod which solves the problem that an existing screw rod is insufficient in plasticizing capacity. The efficient plastic extruder screw comprises a machine barrel, a screw adjusting assembly comprises a motor frame, two connecting rods are arranged on the surface of the motor frame, a connecting support is arranged on the surface of a plastic extruder, a hydraulic rod is arranged at the end, close to the motor frame, of the connecting support, a driving motor is arranged on the surface of the motor frame, and the screw is arranged at the output end of the driving motor. A screw rod baffle block is arranged on the inner wall of the plastic extruder; protrusions are arranged on the surface of the screw rod, and the screw rod and the protrusions rotate and move in the plastic extruder, so that the change degree of the screw rod is conveniently improved, the space size between the protrusions and the screw rod check blocks is conveniently controlled, and the size of a flowing channel, between the screw rod and the inner wall of the plastic extruder, of plastic is changed; the adjustment of the distance may influence the extrusion pressure and yield of the extruder, and the product quality and the production efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of plastic extruder technology, and in particular to a novel high-efficiency plastic extruder barrel screw. Background Technology

[0002] Plastic extruders are commonly used equipment in the plastics processing industry, including twin-screw and single-screw plastic extruders. Plastic raw materials are melted and mixed inside the extruder, and finally fed into the forming die installed at the die head to form the corresponding plastic product. Many plastic products are made from mixtures of several plastics; to improve the performance of the plastic products, this mixture must be fully dispersed and mixed within the plastic extruder.

[0003] Chinese utility model patent, authorized announcement number "CN206884134U", discloses a high-speed screw for a plastic extruder, including a barrel and a screw installed inside the barrel. The screw has coaxial screw ridges on its shaft, and the screw shaft is sequentially provided with a feeding section, a melting section, a compression section, a dispersion section and a mixing section.

[0004] Compared to the traditional single-screw design, the above-mentioned technical solution employs multiple segmented screws and screw ribs with different structures, resulting in more detailed segments and diverse functions. This can meet the high output and high efficiency requirements of plastic extruders. However, the above-mentioned technical solution still has certain drawbacks. When using a single-screw extruder, the screw diameter variation is relatively small. A smaller screw diameter may mean insufficient approximation and kneading of the plastic, leading to inadequate plasticization. Insufficient plasticization capacity directly affects product quality and production efficiency. Therefore, this utility model proposes a novel solution. Utility Model Content

[0005] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a new type of high-efficiency plastic extruder barrel screw, which can solve the problem that when using a single screw extruder, the screw diameter changes little. A small screw diameter may mean that the plastic is not sufficiently applicable and kneaded, resulting in insufficient plasticization of the plastic. Insufficient plasticization capacity will directly affect the product quality and production efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A novel high-efficiency plastic extruder barrel and screw, comprising a barrel and a screw; and further comprising:

[0008] A screw adjusting assembly is disposed at one end of the barrel. The screw adjusting assembly includes a motor frame, which is disposed at the right end of the barrel. Two connecting rods are provided on the surface of the motor frame, and a connecting bracket is provided on the surface of the barrel. Both connecting rods are slidably connected to the connecting bracket. A hydraulic rod is provided at the end of the connecting bracket near the motor frame, and the output end of the hydraulic rod is fixedly connected to the motor frame.

[0009] A drive motor is mounted on a motor frame. The output end of the drive motor is provided with a screw. The screw is rotatably connected to the motor frame. The barrel is sleeved on the surface of the screw. The inner wall of the barrel is provided with a screw stop.

[0010] A protrusion is provided on the screw, and the surface of the protrusion is provided with multiple helical blades. The inner wall of the barrel is provided with multiple fixing strips.

[0011] The connecting bracket, connecting rod, and hydraulic rod are each arranged in two sets symmetrically on both sides of the barrel;

[0012] The plurality of the spiral blades are all spiral-shaped, and the cross-section of the screw stop is triangular and the whole is annular.

[0013] The upper end of the barrel is provided with a feed pipe, and multiple plastic extrusion holes are opened on the side of the barrel away from the feed pipe.

[0014] The screw surface is provided with plastic conveying blades and plastic extrusion blades. The diameter of the plastic extrusion blades increases from left to right. Both the plastic conveying blades and the plastic extrusion blades are spiral-shaped.

[0015] The screw has a first compression blade and a second compression blade on its surface. Both the first compression blade and the second compression blade are spiral-shaped and the pitch decreases from right to left.

[0016] The screw has multiple homogenizing blades on its surface, and the homogenizing blades are fan-shaped.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This high-efficiency plastic extruder screw, through the rotation and movement of the screw and protrusions inside the barrel, facilitates the adjustment of the screw's range of motion, the spacing between the protrusions and screw stops, and the control of the space between the protrusions and screw stops. This alters the size of the flow channel for plastic between the screw and the inner wall of the barrel. A smaller spacing may increase the shear force and mixing effect on the plastic, contributing to uniform plasticization and dispersion. This spacing adjustment may also affect the extrusion pressure and output of the extruder. Through fine adjustment of the screw, the extrusion process can be optimized, improving product quality and production efficiency. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0022] Figure 3 This is a schematic diagram of the fixing strip of this utility model;

[0023] Figure 4 This is a schematic diagram of the screw of this utility model;

[0024] Figure 5 This utility model Figure 2 Enlarged diagram of point A in the middle.

[0025] 1. Barrel; 2. Feed pipe; 3. Plastic extrusion hole; 4. Connecting bracket; 5. Motor frame; 6. Drive motor; 7. Screw; 8. Connecting rod; 9. Hydraulic rod; 10. Protrusion; 11. Spiral blade; 12. Fixing strip; 13. Plastic conveying blade; 14. Plastic extrusion blade; 15. First compression blade; 16. Homogenizing blade; 17. Second compression blade; 18. Screw stop. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0027] In the embodiments, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, a novel high-efficiency plastic extruder barrel and screw includes a barrel 1 and a screw 7; it also includes:

[0028] A screw adjustment assembly is disposed at one end of the barrel 1. The screw adjustment assembly includes a motor frame 5, which is disposed at the right end of the barrel 1. Two connecting rods 8 are provided on the surface of the motor frame 5, and a connecting bracket 4 is provided on the surface of the barrel 1. Both connecting rods 8 are slidably connected to the connecting bracket 4. A hydraulic rod 9 is provided at the end of the connecting bracket 4 near the motor frame 5, and the output end of the hydraulic rod 9 is fixedly connected to the motor frame 5.

[0029] A drive motor 6 is mounted on a motor frame 5. The output end of the drive motor 6 is provided with a screw 7. The screw 7 is rotatably connected to the motor frame 5. The barrel 1 is sleeved on the surface of the screw 7. The inner wall of the barrel 1 is provided with a screw stop 18.

[0030] A protrusion 10 is provided on the screw 7, and the surface of the protrusion 10 is provided with multiple spiral blades 11. The inner wall of the barrel 1 is provided with multiple fixing strips 12.

[0031] The connecting bracket 4, connecting rod 8 and hydraulic rod 9 are each arranged in two sets symmetrically on both sides of the barrel 1; the multiple spiral blades 11 are all spiral in shape, and the cross-section of the screw stop 18 is triangular and the whole is annular.

[0032] The upper end of the barrel 1 is provided with a feed pipe 2, and a plurality of plastic extrusion holes 3 are opened on the side of the barrel 1 away from the feed pipe 2.

[0033] The screw 7 is provided with plastic conveying blades 13 and plastic extrusion blades 14 on its surface. The diameter of the plastic extrusion blades 14 increases from left to right. Both the plastic conveying blades 13 and the plastic extrusion blades 14 are spiral-shaped.

[0034] The screw 7 has a first compression blade 15 and a second compression blade 17 on its surface. Both the first compression blade 15 and the second compression blade 17 are spiral-shaped and the pitch decreases from right to left.

[0035] The screw 7 has a plurality of homogenizing blades 16 on its surface, and the homogenizing blades 16 are fan-shaped.

[0036] When using the extruder of this device, first start the drive motor 6 to drive the screw 7 to rotate around the motor frame 5 and the barrel 1, and add the plastic raw material to be processed into the inside of the barrel 1 from the feed pipe 2. During the rotation of the screw 7, the plastic conveying blade 13 and the plastic extrusion blade 14 are driven to rotate. When the plastic conveying blade 13 rotates, it conveys the plastic raw material. Under the rotation of the plastic extrusion blade 14, the plastic raw material is extruded towards the screw stop 18, which makes it easier to extrude the plastic raw material between the protrusion 10 and the screw stop 18.

[0037] Driven by the protrusion 10, the spiral blade 11 rotates. The spiral blade 11 and the fixing strip 12 guide and constrain the flow of plastic raw material during the extrusion process, ensuring that the plastic raw material can be smoothly conveyed along the predetermined path. At the same time, the fixing strip 12 can also increase the contact area between the plastic raw material and the screw 7 and the inner wall of the barrel 1, thereby enhancing the plasticizing and mixing effect of the plastic raw material. During the high-speed rotation of the screw 7, the spiral blade 11 shears, squeezes and stirs the plastic raw material, while the fixing strip 12 further promotes these effects, allowing the plastic raw material to be more fully plasticized and mixed. This helps to reduce the turbulence and backflow of the plastic raw material and improve the conveying efficiency.

[0038] The screw pitch decreases continuously from right to left through the first compression blade 15 and the second compression blade 17, which facilitates the extrusion of plastic, enhances the extrusion pressure, and improves the melting and mixing effect. This causes the plastic to be subjected to gradually increasing pressure during the conveying process, thereby achieving gradual compression of the plastic. As the screw pitch decreases, the space between the plastic and the inner wall of the screw 7 and the barrel 1 also gradually decreases, thereby increasing the extrusion pressure on the plastic. This gradually increasing extrusion pressure helps the plastic to melt and mix, improves the melting efficiency and mixing uniformity of the extruder, and at the same time, the gradual decrease in screw pitch can also reduce the backflow and turbulence of the plastic, so that the plastic can be conveyed and extruded more smoothly, improving the extrusion efficiency and the stability of the extrusion.

[0039] By setting multiple homogenizing blades 16 on the surface of the screw 7, the multiple fan-shaped homogenizing blades 16 can effectively stir and tumble the plastic when the screw 7 rotates, so that the plastic is more evenly distributed and mixed during the melting process. This not only improves the melting efficiency of the plastic, but also ensures the quality and uniformity of the extruded products.

[0040] During extruder operation, the hydraulic rod 9 extends or retracts, causing the motor frame 5 to move. The motor frame 5 drives the connecting rod 8 to slide inside the corresponding connecting bracket 4. The motor frame 5 drives the drive motor 6 and screw 7 to slide, causing the screw 7 to slide inside the barrel 1. The screw 7 drives the protrusion 10 to move inside the barrel 1. Since the screw stop 18 is fixed to the inner wall of the barrel 1, when the protrusion 10 moves inside the barrel 1, it is easy to adjust the distance between the protrusion 10 and the screw stop 18, making it easy to control the size of the space between the protrusion 10 and the screw stop 18, and changing the size of the flow channel between the plastic and the inner wall of the barrel 1. A smaller distance may increase the shear force and mixing effect on the plastic, which helps to achieve uniform plasticization and dispersion of the plastic. This adjustment of the distance may also affect the extrusion pressure and output of the extruder. Through fine adjustment, the extrusion process can be optimized, and product quality and production efficiency can be improved.

[0041] Furthermore, the rotation and movement of the screw 7 and the protrusion 10 within the barrel 1 facilitates the adjustment of the distance between the protrusion 10 and the screw stop 18, thereby controlling the size of the space between the protrusion 10 and the screw stop 18 and changing the size of the flow channel for plastic between the screw 7 and the inner wall of the barrel 1. A smaller distance may increase the shear force and mixing effect on the plastic, which helps to achieve uniform plasticization and dispersion of the plastic. This adjustment of the distance may also affect the extrusion pressure and output of the extruder. By finely adjusting the screw 7, the extrusion process can be optimized, and product quality and production efficiency can be improved.

[0042] The arrangement of the first compression blade 15 and the second compression blade 17 facilitates the extrusion of plastic, enhances the extrusion pressure, and improves the melting and mixing effect. This allows the plastic to be subjected to gradually increasing pressure during the conveying process, thereby achieving gradual compression of the plastic, which helps to melt and mix the plastic, and improves the melting efficiency and mixing uniformity of the extruder.

[0043] The spiral blades 11 and the fixing strips 12 guide and constrain the flow of plastic raw materials during the extrusion process, ensuring that the plastic raw materials can be smoothly conveyed along the predetermined path, thereby enhancing the plasticizing and mixing effect of the plastic raw materials. During the high-speed rotation of the screw 7, the spiral blades 11 shear, squeeze and stir the plastic raw materials, while the fixing strips 12 further promote these effects, enabling the plastic raw materials to be more fully plasticized and mixed. This helps to reduce turbulence and backflow of the plastic raw materials and improve conveying efficiency.

[0044] Structural Description: Barrel 1: As the main body of the entire device, it provides a space for the processing and extrusion of plastic raw materials;

[0045] Feed pipe 2: Located at the upper end of the barrel 1, used to add the plastic raw materials to be processed into the barrel 1;

[0046] Plastic extrusion hole 3: Located on the side of the barrel 1 away from the feed pipe 2, it is the channel for extruding the processed plastic;

[0047] Connecting bracket 4: There are two connecting brackets 4, which are symmetrically arranged on both sides of the barrel 1 and are slidably connected to the connecting rod 8 to provide support and guidance for the movement of the screw adjustment assembly, and at the same time connect to the hydraulic rod 9;

[0048] Motor frame 5: Located at the right end of the barrel 1, it is used to fix the drive motor 6. It can move under the drive of the hydraulic rod 9, thereby driving the drive motor 6 and the screw 7 to move.

[0049] Drive motor 6: Fixed on the surface of motor frame 5, its output end is connected to screw 7, providing power for the rotation of screw 7;

[0050] Screw 7: Rotatably connected to motor frame 5, with barrel 1 sleeved on its surface. When rotating, it drives components such as plastic conveying blade 13, plastic extrusion blade 14, spiral blade 11, first compression blade 15, homogenization blade 16, and second compression blade 17 to perform operations such as conveying, extruding, mixing, and plasticizing plastic raw materials. In addition, screw 7 can also slide inside barrel 1 under the drive of hydraulic rod 9 to adjust the distance between protrusion 10 and screw stop 18.

[0051] Connecting rod 8: There are four connecting rods 8, which are fixed to the surface of the motor frame 5 and slidably connected to the connecting bracket 4 to ensure the stability of the movement of the motor frame 5;

[0052] Hydraulic rod 9: There are two hydraulic rods 9, symmetrically arranged on both sides of the barrel 1. Their output ends are connected to the motor frame 5. By extending or shortening, the motor frame 5 is moved, thereby realizing the sliding of the screw 7 inside the barrel 1.

[0053] Protrusion 10: Fixed on the surface of screw 7, driving the spiral blade 11 to rotate. When screw 7 moves, the distance between it and screw stop 18 can be adjusted to control the size of the plastic flow channel.

[0054] Spiral blades 11: Multiple spiral blades 11 are fixed on the surface of the protrusion 10 and are spiral in shape. When the screw 7 rotates, they shear, squeeze and stir the plastic raw material. In conjunction with the fixing strip 12, they guide and constrain the flow of the plastic raw material, enhance the plasticizing and mixing effect, reduce turbulence and backflow, and improve the conveying efficiency.

[0055] Fixing strip 12: Multiple fixing strips 12 are fixed on the inner wall of the barrel 1 to increase the contact area between the plastic raw material and the screw 7 and the inner wall of the barrel 1, promote the shearing, extrusion and stirring effect of the spiral blades 11 on the plastic raw material, and further enhance the plasticizing and mixing effect of the plastic raw material.

[0056] Plastic conveying blade 13: Fixed to the surface of screw 7 and spiral in shape, it conveys plastic raw materials when screw 7 rotates;

[0057] Plastic extrusion blade 14: Fixed on the surface of screw 7 and spiral in shape, with the diameter increasing from left to right. When screw 7 rotates, it extrudes the plastic material towards screw stop 18, making it easier to extrude the plastic material between protrusion 10 and screw stop 18.

[0058] First compression blade 15: Fixed on the surface of screw 7 and spiral in shape, with the pitch decreasing from right to left. When screw 7 rotates, it compresses the plastic, increases the extrusion pressure, improves the melting and mixing effect, realizes the gradual compression of plastic, and reduces the backflow and turbulence of plastic.

[0059] Homogenizing blades 16: Multiple homogenizing blades 16 are fixed on the surface of the screw 7 in a fan shape. When the screw 7 rotates, they stir and agitate the plastic, making the plastic more evenly distributed and mixed during the melting process, thereby improving the melting efficiency of the plastic and the quality and uniformity of the extruded products.

[0060] The second compression blade 17 is fixed on the surface of the screw 7 and is spiral in shape. The pitch decreases from right to left. It has the same function as the first compression blade 15, which extrudes the plastic, enhances the extrusion pressure, improves the melting and mixing effect, realizes the gradual compression of the plastic, and reduces the backflow and turbulence of the plastic.

[0061] Screw stop 18: Fixed to the inner wall of the barrel 1, with a triangular cross section and an overall ring shape, it cooperates with the protrusion 10. By adjusting the distance between the two, the size of the flow channel between the plastic and the inner wall of the barrel 1 is controlled, which affects the shear force, mixing effect, extrusion pressure and output of the plastic.

[0062] Obviously, the above embodiments of this utility model are merely illustrative examples and not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, these obvious variations or modifications derived from the essential spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. A novel high-efficiency plastic extruder barrel and screw, comprising a barrel (1) and a screw (7); characterized in that, Also includes: A screw adjustment assembly is set at one end of the barrel (1). The screw adjustment assembly includes a motor frame (5). The motor frame (5) is set at the right end of the barrel (1). The surface of the motor frame (5) is provided with two connecting rods (8). The surface of the barrel (1) is provided with a connecting bracket (4). Both connecting rods (8) are slidably connected to the connecting bracket (4). The end of the connecting bracket (4) near the motor frame (5) is provided with a hydraulic rod (9). The output end of the hydraulic rod (9) is fixedly connected to the motor frame (5). A drive motor (6) is mounted on a motor frame (5). The output end of the drive motor (6) is provided with a screw (7). The screw (7) is rotatably connected to the motor frame (5). The barrel (1) is sleeved on the surface of the screw (7). The inner wall of the barrel (1) is provided with a screw stop (18). A protrusion (10) is provided on the screw (7). The surface of the protrusion (10) is provided with multiple spiral blades (11). The inner wall of the barrel (1) is provided with multiple fixing strips (12).

2. The novel high-efficiency plastic extruder barrel and screw according to claim 1, characterized in that: The number of connecting brackets (4), connecting rods (8) and hydraulic rods (9) are all arranged in two sets symmetrically on both sides of the barrel (1); The multiple spiral blades (11) are all spiral in shape, and the cross section of the screw stop (18) is triangular and the whole is annular.

3. The novel high-efficiency plastic extruder barrel and screw according to claim 1, characterized in that: The upper end of the barrel (1) is provided with a feed pipe (2), and a plurality of plastic extrusion holes (3) are opened on the side of the barrel (1) away from the feed pipe (2).

4. The novel high-efficiency plastic extruder barrel and screw according to claim 1, characterized in that: The screw (7) is provided with plastic conveying blades (13) and plastic extrusion blades (14) on its surface. The diameter of the plastic extrusion blades (14) increases from left to right. Both the plastic conveying blades (13) and the plastic extrusion blades (14) are spiral-shaped.

5. The novel high-efficiency plastic extruder barrel and screw according to claim 1, characterized in that: The screw (7) has a first compression blade (15) and a second compression blade (17) on its surface. The first compression blade (15) and the second compression blade (17) are both spiral and the pitch decreases from right to left.

6. The novel high-efficiency plastic extruder barrel and screw according to claim 1, characterized in that: The screw (7) has a plurality of homogenizing blades (16) on its surface, and the homogenizing blades (16) are fan-shaped.

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