A mixing peristaltic element

Abstract

The present invention provides a mixing creeping element, which relates to the field of extrusion technology. The mixing creeping element comprises two element bodies which are arranged opposite to each other and knead each other; the element body is a cylindrical structure, and a plurality of expansion bodies are arranged on its outer wall; each of the expansion bodies is provided with a plurality of notches; the cross section of the notches is larger at the top and smaller at the bottom, and each of the notches is evenly spaced and obliquely arranged on the expansion body; a plurality of racks are arranged on the inner wall of the element body; the racks are parallel to the axial direction of the element body. The present invention enables the material to have both dispersed mixing and distributed mixing during the mixing process, thereby improving the extrusion quality of the material.

Description

Technical Field

[0001] The invention relates to the technical field of extrusion, and in particular to a mixing creeping element. Background Art

[0002] Twin-screw extruder is a material extrusion device composed of two parallel screws. It is easy to add materials and exhaust, has stable extrusion, and has good mixing and plasticizing properties. It is widely used in the molding processing of extruded products.

[0003] Twin-screw extruders usually include a feeding section, a conveying section, a melt mixing section, a natural exhaust section, a kneading section, and a vacuum exhaust section. The kneading section is particularly important in order to fully mix the materials and meet various performance indicators. Existing kneading sections usually use toothed kneading elements (TME) or threaded kneading elements (SME). These elements will have excessive local shear during the mixing process, which can easily cause problems such as reduced material quality and poor distribution mixing effect.

[0004] Patent CN202010514394.8 discloses a combination of a double-head and triple-head kneading block of a twin-screw extruder. The mixing element can realize the crushing and mixing of powdered or loose raw materials, but the local shear is too strong during mixing, and it is not suitable for mixing materials such as rubber. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a mixing creeping element. By providing a plurality of expanded bodies and opening a plurality of inclined notches on the expanded bodies, the technical problem of uneven mixing shear force in the prior twin-screw extruder is solved.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A mixing creeping element comprises two element bodies arranged opposite to each other and kneading each other, wherein:

[0008] The element body is a cylindrical structure, and a plurality of expanded bodies are arranged on its outer wall; each of the expanded bodies is provided with a plurality of notches; the cross-section of the notches is larger at the top and smaller at the bottom, and each of the notches is evenly spaced and obliquely arranged on the expanded body;

[0009] A plurality of racks are arranged on the inner wall of the element body; the racks are parallel to the axial direction of the element body.

[0010] Optionally or preferably, the enlarged body is a rotating body coaxial with the element body; the generatrix of the enlarged body is trapezoidal, and each of the enlarged bodies includes a first conical surface, a cylindrical surface and a second conical surface.

[0011] Optionally or preferably, the angle between the notch and the axial direction of the element body is 45-55°.

[0012] Optionally or preferably, each of the element bodies is provided with two expanded bodies, wherein the expanded body near the end has a larger outer diameter, and each expanded body is provided with eight notches.

[0013] Optionally or preferably, each of the grooves includes two groove slopes and a groove bottom located between the two groove slopes; each groove slope is a curved surface structure, and the curvature of each groove slope is the same.

[0014] Optionally or preferably, there are notches with coplanar groove slopes on different expanded bodies located on the same element body.

[0015] Based on the above technical solution, the following technical effects can be produced:

[0016] The present invention provides a mixing creeping element, which is suitable for a parallel twin-screw extruder, and has the following beneficial effects:

[0017] (1) The present invention is arranged in the mixing section of the twin-screw extruder, which can make the materials have both dispersive mixing and distributive mixing during the mixing process;

[0018] (2) The present invention can avoid excessive local shearing during the mixing process and improve the quality of the material;

[0019] (3) The structure of the present invention ensures uniform force during use, thereby increasing the service life of the component body and reducing the energy consumption of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram (front view) of the present invention;

[0022] Figure 2 It is a structural schematic diagram (stereoscopic diagram) of the present invention;

[0023] In the figure: 1-expanded body, 101-first conical surface, 102-cylindrical surface, 103-second conical surface, 2-notch, 201-slot slope, 202-slot bottom, 3-tooth rack. DETAILED DESCRIPTION

[0024] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0025] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0026] Embodiment 1:

[0027] This embodiment provides a mixing peristaltic element, such as Figure 1 As shown, it includes two relatively arranged and mutually kneading element bodies, wherein:

[0028] The element body is a cylindrical structure, and a plurality of expanded bodies 1 are arranged on its outer wall; each of the expanded bodies 1 is provided with a plurality of notches 2; the cross section of the notches 2 is larger at the top and smaller at the bottom, and each of the notches 2 is evenly spaced and obliquely arranged on the expanded body 1;

[0029] like Figure 2 As shown, a plurality of racks 3 are provided on the inner wall of the element body; the racks 3 are parallel to the axial direction of the element body.

[0030] In this embodiment, the expanded body 1 is a rotating body coaxial with the element body; the generatrix of the expanded body 1 is a trapezoid, and each of the expanded bodies 1 includes a first conical surface 101, a cylindrical surface 102 and a second conical surface 103. The first conical surface 101 and the second conical surface 103 have different inclination angles, and have a better shearing effect when used in combination.

[0031] Furthermore, each of the element bodies is provided with two expansion bodies 1 of unequal size, which have a better shearing effect compared with expansion bodies of equal size, wherein the expansion body 1 near the end has a larger outer diameter, and each expansion body 1 is provided with eight notches 2, and the angle between the notches 2 and the axial direction of the element body is 49°.

[0032] Furthermore, each of the slots 2 includes two slot slopes 201 and a slot bottom 202 located between the two slot slopes 201 ; each slot slope 2010 is a curved surface structure, and the curvature of each slot slope 201 is the same.

[0033] In this embodiment, on different expanded bodies of the same element body, there are grooves with coplanar groove slopes, which are helpful for the dispersion and flow of materials and improve the quality of materials.

[0034] This embodiment can improve the quality of materials while ensuring the dispersion and mixing of materials, and reduce energy consumption. The mixing performance is improved by about 20% compared with SME elements, and the energy consumption is reduced by about 10% compared with TME type elements.

[0035] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A mixing creeping element, characterized in that: It comprises two oppositely disposed, mutually kneading element bodies, wherein: The element body is a cylindrical structure, and a plurality of expanded bodies are arranged on its outer wall; each of the expanded bodies is provided with a plurality of notches; the cross-section of the notches is larger at the top and smaller at the bottom, and each of the notches is evenly spaced and obliquely arranged on the expanded body; the expanded body is a rotating body coaxial with the element body; the generatrix of the expanded body is a trapezoid, and each of the expanded bodies includes a first conical surface, a cylindrical surface, and a second conical surface; each of the element bodies is provided with two expanded bodies, wherein the expanded body near the end has a larger outer diameter, and each expanded body is provided with eight notches; the first conical surface and the second conical surface have different inclination angles, and have a better shearing effect when used in combination; when arranged, the first conical surfaces and the second conical surfaces of the two element bodies are parallel to each other and correspondingly kneaded; A plurality of racks are arranged on the inner wall of the element body; the racks are parallel to the axial direction of the element body.

2. A mixing peristaltic element according to claim 1, characterized in that: The angle between the notch and the axial direction of the element body is 45-55°.

3. A mixing peristaltic element according to claim 1, characterized in that: Each of the groove openings comprises two groove slopes and a groove bottom located between the two groove slopes; each groove slope is a curved surface structure, and the curvature of each groove slope is the same.

4. A mixing creeping element according to claim 3, characterized in that: There are grooves with coplanar groove slopes on different expanded bodies located on the same component body.

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