An extruder

Abstract

This invention discloses an extruder, relating to the field of rubber processing technology, comprising a housing, a fixed blade, a shaft, and a moving blade. The fixed blade is disposed on the inner surface of the housing, the shaft is rotatably disposed at the center of the housing, and the moving blade is disposed on the outer surface of the shaft, rotating together with the shaft. The moving blade and the fixed blade are arranged at intervals along the axial direction of the shaft, and are not arranged on the same cross-section. The moving blade includes a cutting edge and a blade holder, and the outer contour of the blade holder cross-section is a combination of various non-concentric circular arcs or a combination of straight line segments and arbitrary curve segments. This invention can effectively utilize the extrusion space of the extruder, improving dehydration efficiency and dehydration effect.

Description

Technical Field

[0001] This invention relates to the field of rubber processing technology, and more particularly to an extruder. Background Technology

[0002] In standard rubber processing, multiple steps are used to mechanically dehydrate the rubber blocks. Extrusion dehydration is the first step, typically achieved using multiple extruders connected in series. The extruder is the most critical piece of mechanical dehydration equipment. Extruders usually have the function of shearing and kneading the rubber. Within the extruder chamber, the rubber block is repeatedly sheared and kneaded, squeezing out internal moisture and reducing the block size, which is beneficial for subsequent dehydration processes. The higher the mechanical dehydration rate, the higher the overall production line efficiency.

[0003] like Figure 1 As shown, the existing extruder includes a housing 2, fixed blades 1, a shaft 4, and moving blades 3. The housing 2 is cylindrical, and multiple rows of fixed blades 1 are mounted on it, arranged along the axial and circumferential directions of the housing 2. A rotatable shaft 4 is located at the center of the housing 2, and moving blades 3 are mounted on the shaft 4. Multiple moving blades 3 are sleeved on the shaft 4 and arranged along the outer circumference and axial direction of the shaft 4, rotating with the shaft 4. The moving blades 3 and the fixed blades 1 are arranged at intervals along the axial direction, and the moving blades 3 and the fixed blades 1 are not arranged on the same cross section. A rubber block is radially fed into the extruder from one end, moves axially, and is extruded axially from the other end.

[0004] like Figure 2-3 As shown, the moving blade 3 comprises two parts: a blade edge 3.1 and a blade holder 3.2. When the moving blade 3 rotates with the shaft 4, the blade edge 3.1 of the moving blade 3 shears against the adjacent fixed blade 1, cutting the rubber block filled between the two fixed blades 1 into smaller pieces. Simultaneously, the housing 2, fixed blade 1, moving blade 3, shaft 4, and the two end faces of the housing form a relatively enclosed space. As the moving blade 3 rotates, this space continuously changes, kneading the rubber block inside.

[0005] The existing extruder blade holder 3.2 has a concentric circular arc outer contour, and the distance from the center of its shaft 4 section to the circular arc contour of the blade holder 3.2 is the same. The gap between the fixed blade 1 and the blade holder 3.2 is fixed. In this type of extruder, the space formed by the fixed blade 1, the blade holder 3.2, and the machine housing 4 remains unchanged during the rotation of the moving blade 3. Moreover, the gap between the end of the fixed blade 1 and the outer contour of the blade holder 3.2 is very small, and the rubber block cannot enter. This space cannot play a kneading and shearing role on the rubber block, so the space inside the machine housing 2 cannot be fully utilized to compress the rubber. For the machine housing 2 with a fixed space, this results in a reduction in the effective compression space, which reduces the extrusion dehydration efficiency.

[0006] Therefore, those skilled in the art are dedicated to developing an extruder. Summary of the Invention

[0007] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is how to utilize the space between the end of the fixed blade and the moving blade holder to participate in the extrusion, thereby improving the extrusion dewatering efficiency and the dewatering effect of the extruder.

[0008] To achieve the above objectives, the present invention provides an extrusion press, comprising a housing, a fixed blade, a shaft, and a movable blade. The fixed blade is disposed on the inner surface of the housing, the shaft is rotatably disposed at the center of the housing, and the movable blade is disposed on the outer surface of the shaft. The movable blade rotates together with the shaft. The movable blade and the fixed blade are arranged at intervals along the axial direction of the shaft, and the movable blade and the fixed blade are not arranged on the same cross section. The movable blade includes a cutting edge and a blade holder. The outer contour line of the blade holder cross section is a combination of various non-concentric circular arcs or a combination of straight line segments and arbitrary curve segments.

[0009] Furthermore, the housing is cylindrical.

[0010] Furthermore, the fixed blades are arranged in a plurality of configurations, and the fixed blades are arranged along the axial and circumferential directions of the housing.

[0011] Furthermore, the moving blades are arranged in multiple ways, and the moving blades are sleeved on the outer surface of the shaft and arranged along the outer circumference and axial direction of the shaft.

[0012] Furthermore, on the cross-section of the tool holder, the distances from the center of the shaft to the outer contour line of the cross-section of the tool holder are not equal.

[0013] Furthermore, the outer contour of the tool holder cross section is a combination of two circular arcs, the centers of the two circular arcs are not at the same point, and the radii of the two circular arcs are also different.

[0014] Furthermore, the outer contour line of the tool holder cross section is a combination of circular arcs with the same radius but not concentric.

[0015] Furthermore, the outer contour line of the tool holder cross-section is a combination of straight line segments and arbitrary circular arcs.

[0016] Furthermore, the compression gap between the end of the fixed blade and the blade holder is 3-5mm.

[0017] Furthermore, it is applied to the extrusion processing of rubber.

[0018] Compared with the prior art, the present invention has the following advantages: the present invention can effectively improve the utilization rate of the extrusion space of the rubber extruder, effectively knead and shear the rubber, and improve the dehydration efficiency and dehydration effect of the extruder.

[0019] The following will further explain the concept, specific structure, and technical effects of the present invention in conjunction with the accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of an existing extruder;

[0021] Figure 2 This is a three-dimensional structural diagram of an existing extrusion machine tool;

[0022] Figure 3 This is the front view of an existing extruder;

[0023] Figure 4 This is a schematic diagram of the extruder structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the extrusion motor blade structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the extrusion operation of the extruder of the present invention.

[0026] Wherein: 1-fixed blade, 2-machine housing, 3-moving blade, 3.1-blade, 3.2-blade holder, 4-axis. Detailed Implementation

[0027] The preferred embodiments of the present invention are described below with reference to the accompanying drawings to make the technical content clearer and easier to understand. The present invention can be embodied in many different forms, and the scope of protection of the present invention is not limited to the embodiments mentioned herein.

[0028] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and components with similar structures or functions are indicated by similar numerical designations. The dimensions and thicknesses of each component shown in the drawings are arbitrary, and the present invention does not limit the dimensions and thicknesses of each component. To make the illustrations clearer, the thickness of some components has been appropriately exaggerated in the drawings.

[0029] like Figure 4 The image shows an extruder according to the present invention, comprising a housing 2, fixed blades 1, a shaft 4, and movable blades 3. The housing 2 is cylindrical. Multiple rows of fixed blades 1 are mounted on the housing 2, arranged along the axial and circumferential directions of the housing 2. A rotatable shaft 4 is located at the center of the housing 2, and movable blades 3 are mounted on the shaft 4. Multiple movable blades 3 are sleeved on the shaft 4 and arranged along the outer circumference and axial direction of the shaft 4, rotating with the shaft 4. The movable blades 3 and the fixed blades 1 are arranged at intervals along the axial direction of the shaft 4, and are not arranged on the same cross-section. A rubber block is radially fed into the extruder from one end, moves axially, and is axially extruded from the other end.

[0030] like Figure 5As shown, the moving tool 3 of the present invention includes a cutting edge 3.1 and a tool holder 3.2. The cross-sectional contour of the tool holder 3.2 is a combination of various non-concentric circular arcs, meaning that the distance from the center of the shaft to the contour of the tool holder is not the same on this cross-section. In one embodiment, the outer contour of the tool holder 3.2 is a combination of two circular arcs whose centers are not at the same point and whose radii are also different. In other embodiments, the outer contour of the moving tool holder can be a combination of circular arcs with the same radius but not concentric, or it can be a combination of straight line segments and arbitrary curved segments.

[0031] like Figure 4 and 6 As shown, during the operation of the extruder, on the one hand, when the blade 3.1 and blade holder 3.2 of this invention rotate with the shaft 4, the blade 3.1 shears against the adjacent fixed blade 1, cutting the rubber block filled between the two fixed blades 1 into smaller pieces. Simultaneously, the machine housing 2, fixed blade 1, blade 3.1 and blade holder 3.2, shaft 4, and the two end faces of the machine housing form a relatively enclosed space. When the moving blade 3 rotates, this space continuously changes, exerting a kneading effect on the rubber block inside. At the same time, the space formed by the fixed blade 1, blade holder 3.2, and machine housing 2 also continuously changes with the rotation of the fixed blade, providing additional kneading and shearing effects on the rubber block.

[0032] On the other hand, as the moving blade 3 rotates, when the gap between the end of the fixed blade 1 and the blade holder 3.2 gradually increases, the rubber block can enter between the end of the fixed blade 1 and the fixed blade holder 3.2, that is, when the blade 3.1 and the blade holder 3.2 are in the position of... Figure 4 When positioned as shown, the rubber block enters the space formed by the end of the fixed blade 1 and the moving blade holder 3.2. As this space gradually decreases until the gap between the end of the fixed blade 1 and the blade holder 3.2 is only 3-5mm, that is, when the blade 3.1 and the blade holder 3.2 are in the position shown... Figure 6 At the position shown, the rubber block is kneaded and sheared by the end of the fixed blade 1 and the blade holder 3.2. Therefore, the dehydration effect of a single extruder can be improved without increasing the number of moving blades 3 and fixed blades 1.

[0033] This invention can significantly improve the dewatering efficiency and effect of extruders. An extruder equipped with 15 conventional moving blades achieves a dewatering effect comparable to an extruder equipped with 11 moving blades of this invention.

[0034] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An extruder, characterized in that, The device includes a housing, a fixed blade, a shaft, and a movable blade. The fixed blade is disposed on the inner surface of the housing, the shaft is rotatably disposed at the center of the housing, and the movable blade is disposed on the outer surface of the shaft. The movable blade rotates with the shaft. The movable blade and the fixed blade are arranged at intervals along the axial direction of the shaft, and the movable blade and the fixed blade are not arranged on the same cross section. The movable blade includes a cutting edge and a blade holder. The outer contour line of the blade holder cross section is a combination of various non-concentric circular arcs or a combination of straight line segments and arbitrary curve segments. As the moving blade rotates, the gap between the end of the fixed blade and the blade holder gradually increases, and the rubber block enters between the end of the fixed blade and the blade holder; as this space gradually decreases, until the compression gap between the end of the fixed blade and the blade holder is 3-5mm, the rubber block is kneaded and sheared by the end of the fixed blade and the blade holder.

2. The extruder as described in claim 1, characterized in that, The casing is cylindrical.

3. The extruder as described in claim 1, characterized in that, The fixed blades are arranged in a plurality of configurations, and are distributed along the axial and circumferential directions of the housing.

4. The extruder as described in claim 1, characterized in that, The moving blades are arranged in a plurality of configurations, and are fitted onto the outer surface of the shaft and arranged along the outer circumference and axial direction of the shaft.

5. The extruder as described in claim 1, characterized in that, On the cross-section of the tool holder, the distance from the center of the shaft to the outer contour line of the cross-section of the tool holder is not equal.

6. The extruder as described in claim 1, characterized in that, The outer contour of the tool holder cross section is a combination of two circular arcs, the centers of the two circular arcs are not at the same point, and the radii of the two circular arcs are also different.

7. The extruder as described in claim 1, characterized in that, The outer contour of the tool holder cross section is a combination of circular arcs with the same radius but not concentric.

8. The extruder as described in claim 1, characterized in that, The tool holder cross-section outer contour line is a combination of straight line segments and arbitrary circular arcs.

9. The extruder according to any one of claims 1-8, characterized in that, It is used in the extrusion processing of rubber.

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