Twin-screw extruder suitable for various rubber formulas

Abstract

The utility model discloses a twin-screw extruder suitable for various rubber formulas, and relates to the technical field of twin-screw extruders, the twin-screw extruder comprises a base, the upper surface of the base is fixedly connected with an extrusion shell, the outer end of the extrusion shell is provided with a butt-joint plate, the outer side of the butt-joint plate is fixedly connected with a motor, and the butt-joint plate is fixedly connected with the motor. And a double-screw assembly is arranged between the output end of the motor and the inner side of the butt joint plate, meanwhile, the double-screw assembly is arranged in the extrusion shell, and a feeding hopper is arranged on the upper side of the extrusion shell in a penetrating mode. According to the double-screw extruder suitable for various rubber formulas, when a double-screw assembly is replaced by a user, a butt joint rod can be in butt joint with the interior of a butt joint groove, meanwhile, the butt joint rod is in butt joint with the outer side of a limiting rod in an embedded mode, at the moment, under the limiting effect of the limiting rod and the butt joint groove, mounting and limiting of a butt joint plate can be completed, and the butt joint plate can be conveniently replaced. Therefore, the style of the double-screw assembly can be quickly replaced, and the double-screw assembly can be selectively processed according to the viscosity of different rubbers.

Description

Technical Field

[0001] The utility model relates to the technical field of twin-screw extruders, in particular to a twin-screw extruder suitable for various rubber formulations. Background Art

[0002] Twin-screw extruders play a crucial role in bicycle tire production, particularly in the preparation of new functional rubber materials and products. They effectively promote the uniform mixing of rubber and other functional fillers (such as nanomaterials and reinforcing materials), while optimizing the properties of the rubber material, providing technical support for the production of high-performance, durable, and specialized bicycle tires.

[0003] Rubber viscosity is a key indicator of its processing performance. High-viscosity rubber generally indicates greater resistance to deformation during processing, making it suitable for applications requiring higher strength and wear resistance. Low-viscosity rubber, on the other hand, is more suitable for applications requiring higher fluidity and lower hardness. High-viscosity rubber formulations are ideal for urban riding applications, particularly those prioritizing durability and performance. Common medium-viscosity rubbers are suitable for everyday riding, mountain bike, and commuter tires, where a balance of durability, comfort, and grip is crucial.

[0004] Prior Art 1 (Publication No. CN102205620A, Chinese Patent Publication Date: October 5, 2011) describes a differential-speed conical twin-screw extruder, primarily consisting of a die, heating and cooling devices, a barrel, an exhaust port, screws, a feeding device, a transmission, and a motor. The two conical screws have different numbers of flight tips, each consisting of a female rotor and a male rotor. Their rotational speed ratio is inversely proportional to the flight tip ratio. The screws, when assembled, have at least one thread engagement zone, where the female rotor has an integer multiple of the male rotor's flight tips. The rotational speed ratio of the male and female rotors is inversely proportional to the flight tip ratio, enabling differential rotation and non-interference during movement. Depending on material processing requirements, thread segments with different leads and cross-sectional profiles or other configurations can be configured in the feeding, melting, exhaust, and metering sections of the screw. When installed, the screws ensure at least one thread engagement zone for differential rotation. Different sections can be meshed or non-meshed to enhance mixing or other functions. The extruder has good mixing, plasticizing and conveying capabilities, and is suitable for processing and shaping a variety of granular, powdery and even block materials such as plastics, rubber, food and explosives.

[0005] There is also prior art 2 (publication number: CN104309095A, Chinese patent publication date: January 28, 2015) a twin-screw extruder comprising a barrel and two screw units, both of which are located within the barrel. One of the screw units meshes to form an intermeshing section, and the end of the intermeshing section is a discharge port. The barrel further comprises an independent section and a filling section. The barrel is divided into two independent through-flow channels. The independent section, the filling section, and the intermeshing section are sequentially arranged along the conveying direction of the screw units. The two screw units of the independent section and the filling section are both in a non-intermeshing state, and the two screw units of the independent section and the filling section are each located within the flow channel. The barrel is provided with a heater throughout, and the filling section is provided with a filler. The independent section and the filling section are equivalent to two separate single screws. The molten material in the screw groove has a good sealing effect, preventing the loss of gas and supercritical fluid added thereto. The intermeshing section has a good dispersion and mixing effect on the material, making it suitable for polymer melt foaming processing.

[0006] Although both existing technologies 1 and 2 can be used to process rubber, for high-viscosity rubber, the interlocking twin-screw design can provide stronger shear force and promote the fluidity of the material; while the parallel twin-screw is suitable for processing low-viscosity rubber, which has better fluidity and can be processed more smoothly. The above-mentioned device cannot replace and adjust its screw structure, and the adaptability of the device is not high. When the staff needs to process rubber of different viscosities, they also need to replace the entire extruder, which is relatively low in work efficiency.

[0007] Therefore, we propose a twin-screw extruder suitable for a variety of rubber formulations in order to solve the above-mentioned problems. Utility Model Content

[0008] The purpose of the utility model is to provide a twin-screw extruder suitable for a variety of rubber formulations, so as to solve the problem proposed in the above background technology that the screw structure of the above device cannot be replaced and adjusted, the adaptability of the device is not high, and when the staff needs to process rubbers of different viscosities, they need to replace the entire extruder, resulting in relatively low work efficiency.

[0009] To achieve the above-mentioned object, the present invention provides the following technical solution: a twin-screw extruder suitable for a variety of rubber formulations, comprising a base, an extrusion housing fixedly connected to the upper surface of the base, a docking plate provided at the outer end of the extrusion housing, a motor fixedly connected to the outer side of the docking plate, a twin-screw assembly provided between the output end of the motor and the inner side of the docking plate, the twin-screw assembly provided inside the extrusion housing, and a feed hopper provided through the upper side of the extrusion housing;

[0010] The outer side of the extruded shell is fixedly connected with a fixed shaft, and the outer side of the fixed shaft is nested and connected with a positioning plate, and the side of the extruded shell is provided with a resistance mechanism that can drive the positioning plate to rotate.

[0011] Furthermore, a docking groove is provided on the end side of the extruded shell, and a limiting rod is fixedly connected inside the docking groove, and a docking rod is nested and docked outside the limiting rod, and the outer end of the docking rod is fixedly connected to the side of the docking plate.

[0012] Furthermore, the docking grooves are opened symmetrically with respect to the center point of the extruded shell, and the docking rods form a sliding structure through the docking plates and the limiting rods.

[0013] Furthermore, a strong magnetic plate is fixedly connected to the side of the extruded shell, and a strong magnetic plate is also fixedly connected to the inner side of the end of the positioning plate, and the two sets of strong magnetic plates have opposite magnetic properties.

[0014] Furthermore, the interference mechanism includes a movable groove, a linkage rod is nested and connected inside the movable groove, a linkage block is fixedly connected at the center of the linkage rod, and the linkage block is nested and connected to the outside of the limit rod, a push block is fixedly connected to the end side of the linkage rod, and a torsion spring is fixedly connected between the lower side of the positioning plate and the fixed shaft.

[0015] Furthermore, the linkage block forms a sliding structure through the docking rod and the limiting rod, and the linkage rod forms a sliding structure through the linkage block and the movable groove.

[0016] Furthermore, the positioning plates form a rotating structure through the push block and the fixed shaft, and the positioning plates form an elastic structure through the torsion spring and the fixed shaft, and four groups of positioning plates are symmetrically arranged about the center point of the extruded shell.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The motor can drive the twin-screw assembly to rotate, thereby preparing and extruding the rubber. When the user needs to process rubber with different viscosities, the docking plate can be replaced, thereby replacing different styles of twin-screw assemblies and adjusting the screw structure of the twin-screw extruder. Adjustments can be made according to different production needs to optimize the mixing, plasticizing, extrusion and other processes. The docking plate can be limited by the resistance mechanism, making the installation more stable.

[0019] 2. When replacing the twin-screw assembly, the user can dock the docking rod into the docking groove and nest the docking rod on the outside of the limit rod. Under the limiting action of the limit rod and the docking groove, the installation and positioning of the docking plate can be completed, thereby quickly completing the replacement of the twin-screw assembly style. It can be selectively processed according to the viscosity of different rubbers, so that the twin-screw extruder can adapt to rubber materials with different viscosities, reducing the complexity of replacing equipment or frequently adjusting the process flow, and improving the adaptability and efficiency of the rubber production line;

[0020] 3. When the docking rod slides and docks on the outside of the limit rod, the docking rod can synchronously push the linkage block nested and connected on the outside of the limit rod to slide. At this time, the linkage block can synchronously drive the positioning plate to rotate through the linkage rod, so that the end side of the positioning plate rotates and engages with the outside of the docking plate, further limiting and fixing the docking plate to prevent it from falling off;

[0021] 4. When the outer side of the docking plate contacts the inner side of the positioning plate, the strong magnetic plate set between the two will be attracted by the magnetic force, thereby improving the stability of the engagement and limit of the docking plate and the positioning plate, and further improving the stability of the docking of the docking plates;

[0022] 5. When the docking plate is not installed with the extrusion shell, the side of the positioning plate can be squeezed, causing the positioning plate to push the push block to move in the opposite direction, thereby further causing the linkage block to push the docking rod in the opposite direction. At this time, the docking rod moves outward, which can drive the docking rod to move outward synchronously, thereby conveniently replacing the twin-screw assembly, reducing downtime and operational complexity. In addition, the structural design of the convenient replacement of the twin-screw assembly can make the twin-screw extruder flexible according to the viscosity range of different raw materials, thereby optimizing the material mixing process and ensuring the consistency and performance stability of the tire rubber formula. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the three-dimensional cross-sectional structure of the utility model;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of the positioning plate of the utility model;

[0026] Figure 4 This is a schematic diagram of the three-dimensional structure of the linkage rod of the utility model;

[0027] Figure 5 This is a schematic diagram of the three-dimensional structure of the push block of the utility model;

[0028] Figure 6 This is a schematic diagram of the three-dimensional structure of the powerful magnetic plate of the utility model;

[0029] Figure 7 This is a schematic diagram of the three-dimensional structure of the linkage block of the utility model.

[0030] In the figure: 1. Base; 2. Extrusion shell; 3. Feed hopper; 4. Docking plate; 5. Motor; 6. Twin-screw assembly; 7. Positioning plate; 8. Strong magnetic plate; 9. Docking groove; 10. Limit rod; 11. Docking rod; 12. Fixed shaft; 13. Torsion spring; 14. Linkage rod; 15. Movable groove; 16. Push block; 17. Linkage block. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Example 1: Figure 1 、 Figure 2 and Figure 7 The technical solution shown in the figure, the present invention provides the following technical solution: a twin-screw extruder suitable for a variety of rubber formulations, discloses a docking rod 11, through which the twin-screw assembly 6 can be replaced:

[0033] A base 1, an extrusion housing 2 is fixedly connected to the upper surface of the base 1, and a docking plate 4 is provided at the outer end of the extrusion housing 2, and a motor 5 is fixedly connected to the outer side of the docking plate 4, and a twin-screw assembly 6 is provided between the output end of the motor 5 and the inner side of the docking plate 4, and the twin-screw assembly 6 is provided inside the extrusion housing 2, and a feed hopper 3 is provided through the upper side of the extrusion housing 2;

[0034] A docking groove 9 is provided on the end side of the extruded shell 2, and a limiting rod 10 is fixedly connected to the inside of the docking groove 9, and a docking rod 11 is nested and docked on the outside of the limiting rod 10. At the same time, the outer end of the docking rod 11 is fixedly connected to the side of the docking plate 4. The docking groove 9 is symmetrically opened about the center point of the extruded shell 2, and the docking rod 11 forms a sliding structure with the limiting rod 10 through the docking plate 4.

[0035] The motor 5 can drive the twin-screw assembly 6 to rotate, thereby preparing and extruding the rubber. When the user needs to process rubbers of different viscosities, the docking plate 4 can be replaced, thereby replacing different styles of twin-screw assemblies 6, adjusting the screw structure of the twin-screw extruder, and adjusting it according to different production needs to adapt to rubber formulas of different viscosities to ensure that each raw material is fully mixed and extruded. The docking plate 4 can be limited by the resistance mechanism to make the installation more stable. When the user replaces the twin-screw assembly 6, the docking rod 11 can be docked to the inside of the docking groove 9, and at the same time, the docking rod 11 is nested and docked on the outside of the limiting rod 10. At this time, under the limiting action of the limiting rod 10 and the docking groove 9, the installation limit of the docking plate 4 can be completed, thereby quickly completing the replacement of the twin-screw assembly 6 style, so that it can be selectively processed according to the viscosity of different rubbers, so that the twin-screw extruder can adapt to rubber materials of different viscosities, reducing the complexity of replacing equipment or frequently adjusting the process flow, and improving the adaptability and efficiency of the rubber production line.

[0036] Example 2: Figure 3 、 Figure 4 and Figure 6 The technical solution shown in the figure, the present invention provides the following technical solution: a twin-screw extruder suitable for a variety of rubber formulations, discloses a resistance mechanism, and the resistance mechanism can improve the stability of the twin-screw assembly 6 docking:

[0037] The outer side of the extrusion shell 2 is fixedly connected to a fixed shaft 12, and the outer side of the fixed shaft 12 is nested with a positioning plate 7, and the side of the extrusion shell 2 is provided with a resistance mechanism that can drive the positioning plate 7 to rotate, and the resistance mechanism includes a movable groove 15, and the interior of the movable groove 15 is nested with a linkage rod 14, and the center of the linkage rod 14 is fixedly connected with a linkage block 17, and the linkage block 17 is nested and connected to the outer side of the limit rod 10, and the end side of the linkage rod 14 is fixedly connected with a push block 16, and a torsion spring 13 is fixedly connected between the lower side of the positioning plate 7 and the fixed shaft 12, and the linkage block 17 forms a sliding structure with the limit rod 10 through the docking rod 11, and the linkage rod 14 forms a sliding structure with the movable groove 15 through the linkage block 17.

[0038] When the user replaces the double-screw assembly 6, the docking rod 11 can be docked to the inside of the docking groove 9, and the docking rod 11 can be nested and docked on the outside of the limit rod 10. At this time, under the limiting action of the limit rod 10 and the docking groove 9, the installation limit of the docking plate 4 can be completed, thereby quickly completing the replacement of the style of the double-screw assembly 6, so that it can be selectively processed according to the viscosity of different rubbers. When the docking rod 11 slides and docks on the outside of the limit rod 10, the docking rod 11 can synchronously push the linkage block 17 nested and connected on the outside of the limit rod 10 to slide. At this time, the linkage block 17 can synchronously drive the positioning plate 7 to rotate through the linkage rod 14, so that the end side of the positioning plate 7 rotates and engages with the outside of the docking plate 4, further limiting and fixing the docking plate 4 to prevent the docking plate 4 from falling off.

[0039] Example 3: Figure 4 and Figure 5 The technical solution shown in the figure, this utility model provides the following technical solution: a twin-screw extruder suitable for a variety of rubber formulations, discloses a strong magnetic plate 8, which can further improve the stability of the docking:

[0040] A strong magnetic plate 8 is fixedly connected to the side of the extruded shell 2, and a strong magnetic plate 8 is also fixedly connected to the inner side of the end of the positioning plate 7, and the magnetic properties of the two groups of strong magnetic plates 8 are opposite. The positioning plate 7 forms a rotating structure with the fixed shaft 12 through the push block 16, and the positioning plate 7 forms an elastic structure with the fixed shaft 12 through the torsion spring 13, and four groups of positioning plates 7 are symmetrically arranged about the center point of the extruded shell 2.

[0041] When the outer side of the docking plate 4 contacts the inner side of the end side of the positioning plate 7, the strong magnetic plate 8 arranged between the two will be adsorbed under the drive of the magnetic force, thereby improving the stability of the engagement and limiting of the docking plate 4 and the positioning plate 7, and further improving the docking stability of the docking plate 4. When the docking plate 4 is not installed with the extrusion shell 2, the side of the positioning plate 7 can be squeezed, so that the positioning plate 7 pushes the push block 16 to move in the opposite direction, thereby further causing the linkage block 17 to push the docking rod 11 in the opposite direction. At this time, the docking rod 11 moves outward, which can drive the docking rod 11 to move outward synchronously, thereby conveniently replacing the double-screw assembly 6.

[0042] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0043] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A twin-screw extruder suitable for a variety of rubber formulations, comprising a base (1), wherein an extrusion shell (2) is fixedly connected to the upper surface of the base (1), and a docking plate (4) is provided at the outer end of the extrusion shell (2), and a motor (5) is fixedly connected to the outer side of the docking plate (4), and a twin-screw assembly (6) is provided between the output end of the motor (5) and the inner side of the docking plate (4), and the twin-screw assembly (6) is provided inside the extrusion shell (2), and a feed hopper (3) is provided through the upper side of the extrusion shell (2); Its characteristics are: The outer side of the extruded shell (2) is fixedly connected to a fixed shaft (12), and the outer side of the fixed shaft (12) is nested with a positioning plate (7), and the side of the extruded shell (2) is provided with a resistance mechanism that can drive the positioning plate (7) to rotate.

2. A twin-screw extruder suitable for various rubber formulations according to claim 1, characterized in that: A docking groove (9) is provided on the end side of the extruded shell (2), and a limiting rod (10) is fixedly connected inside the docking groove (9), and a docking rod (11) is nested and docked outside the limiting rod (10), while the outer end of the docking rod (11) is fixedly connected to the side of the docking plate (4).

3. A twin-screw extruder suitable for various rubber formulations according to claim 2, characterized in that: The docking groove (9) is opened symmetrically with respect to the center point of the extruded shell (2), and the docking rod (11) forms a sliding structure through the docking plate (4) and the limiting rod (10).

4. A twin-screw extruder suitable for various rubber formulations according to claim 1, characterized in that: A strong magnetic plate (8) is fixedly connected to the side of the extruded shell (2), and a strong magnetic plate (8) is also fixedly connected to the inner side of the end of the positioning plate (7), and the two sets of strong magnetic plates (8) have opposite magnetic properties.

5. The twin-screw extruder suitable for various rubber formulations according to claim 2, characterized in that: The interference mechanism includes a movable groove (15), a linkage rod (14) is nested in the interior of the movable groove (15), a linkage block (17) is fixedly connected at the center of the linkage rod (14), and the linkage block (17) is nested and connected to the outside of the limiting rod (10), a push block (16) is fixedly connected to the end side of the linkage rod (14), and a torsion spring (13) is fixedly connected between the lower side of the positioning plate (7) and the fixed shaft (12).

6. A twin-screw extruder suitable for various rubber formulations according to claim 5, characterized in that: The linkage block (17) forms a sliding structure with the docking rod (11) and the limiting rod (10), and the linkage rod (14) forms a sliding structure with the linkage block (17) and the movable groove (15).

7. The twin-screw extruder suitable for various rubber formulations according to claim 5, characterized in that: The positioning plates (7) form a rotating structure with the push block (16) and the fixed shaft (12), and the positioning plates (7) form an elastic structure with the fixed shaft (12) through the torsion spring (13), and four groups of positioning plates (7) are symmetrically arranged about the center point of the extrusion shell (2).

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