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CN-117341159-B - Stretching reinforced mixing element

CN117341159BCN 117341159 BCN117341159 BCN 117341159BCN-117341159-B

Abstract

The invention relates to the technical field of injection molding production, and particularly discloses a stretching reinforced mixing element which comprises at least one stretching component and at least one shearing component, wherein the stretching reinforced mixing element can be used as a single screw in an injection molding machine, the direction from the stretching component to the shearing component is set to be the material conveying direction, various plastic master batches are fed from a feed inlet of the injection molding machine, molten fluid materials are formed through high temperature action, the fluid materials are split through the stretching component, the split fluid materials are stretched and then enter the shearing component, the shearing component is utilized for shearing and dispersing, so that the fluid materials are fully mixed, and the dispersing, stretching and shearing are matched for mixing, so that the mixing effect can be improved, and the material molecular chain with shearing allergy is not degraded due to the fact that the material molecular chain has no larger shearing force, and the property of the material is prevented from being influenced in the mixing process.

Inventors

  • RAN KE
  • HUANG WEIYANG
  • BAI RUJIA
  • XU BAIPING
  • YU HUIWEN
  • Tan Lingcao
  • XIAO SHUPING
  • LI HONGNAN
  • GUO WENSHUAI
  • ZHANG CHUNHUA

Assignees

  • 广东仕诚塑料机械有限公司
  • 五邑大学

Dates

Publication Date
20260505
Application Date
20230922

Claims (8)

  1. 1. A stretch reinforced mixing element comprising: the stretching component comprises a first rotating body capable of rotating around a rotating central shaft and a plurality of baffle plates circumferentially distributed around the first rotating body, and a thin groove for a flow to pass through is formed between two adjacent baffle plates; At least one shearing part, the shearing part comprises a second rotating body capable of rotating around a rotating central shaft, the outer surface of the second rotating body is provided with a plurality of spiral screw edges and screw grooves formed between two adjacent screw edges, and the depth of the screw grooves gradually changes along the spiral direction; the stretching component is in transmission connection with the shearing component, the stretching component and the shearing component are multiple, and the stretching component and the shearing component are in transmission connection and are alternately arranged along the axial direction; the depth of at least one screw groove is from big to small along the screw direction; The shearing component is provided with four channels, comprising two inlet channels and two outlet channels, wherein the depth of the spiral grooves of the two inlet channels is from large to small along the spiral direction, from the bottom diameter of the second rotating body to the outer diameter, and the depth of the spiral grooves of the two outlet channels is from shallow to deep, from the outer diameter of the second rotating body to the bottom diameter.
  2. 2. A stretch enhancing mixing element according to claim 1, wherein the baffles of at least one of said stretching members are "shen" -shaped baffles.
  3. 3. A stretch enhancing mixing member according to claim 1, wherein the baffle of at least one of said stretch members is an S-baffle.
  4. 4. A stretch-enhanced mixing element according to claim 3, wherein the angle α between the centerline of the S-baffle in the longitudinal direction and the tangent to the first rotor satisfies the condition 0 ° and α <90 °.
  5. 5. A stretch enhancing mixing element according to claim 4, wherein α is 0 ° or 30 °.
  6. 6. A stretch enhancing mixing element according to claim 3, wherein the outer surface of the first rotor is circumferentially provided with a plurality of oppositely and complementarily arranged trapezoidal curved surfaces, and the S-shaped baffle spans two adjacent trapezoidal curved surfaces.
  7. 7. A stretch enhancing mixing element according to claim 1, wherein the groove depth is at a minimum provided with baffles for flow resistance.
  8. 8. A stretch enhancing mixing element according to claim 1, wherein said first rotor is integrally connected to said second rotor.

Description

Stretching reinforced mixing element Technical Field The invention relates to the technical field of injection molding production, in particular to a stretching reinforced mixing element. Background The extruder is the most widely used equipment in the plastic molding and processing industry, the mixing element is an important component in the extruder, and a single screw mixing element or a double screw mixing element is generally adopted, and the common single screw mixing element has pin type, barrier type, pineapple type and the like, but has weak shearing effect and poor dispersion mixing effect, so that the industrial application of the single screw mixing element has a certain limit. In order to solve the problem of improving the dispersion mixing effect of materials, the structure improvement is generally carried out on a single screw, the single screw extruder can refer to a single screw extruder disclosed in Chinese patent publication No. CN102303402B, and the single screw extruder comprises a shell and a screw, wherein the screw is rotatably arranged in a rotating cavity in the shell, a main pushing piece is arranged on the outer peripheral surface of the screw, the main pushing piece is spirally extended on the outer peripheral surface of the screw, a feeding port and a discharging port are arranged on the shell, a feeding part and a discharging part are arranged on the screw, the feeding part of the screw is positioned at the position of the feeding port of the shell, the discharging part of the screw is positioned in the discharging port of the shell, a spiral extending spiral structure is arranged on the outer peripheral surface of the feeding part of the screw, the pitch of the spiral structure is different from the pitch of the main pushing piece on the feeding part of the screw, and at least one-time cross is formed between the spiral structure and the main pushing piece, so that a sharp corner-shaped shearing structure is formed at the crossing part of the main pushing piece and the main pushing piece. In the single screw extruder in the prior art, most of the single screw extruder achieves the mixing effect by enhancing the shearing action and the shunt strength, and the high-strength shearing can achieve the dispersion mixing effect, but the molecular chain of the shearing allergic material is easily degraded, so that the performance of the material is reduced. Accordingly, the prior art is still in need of improvement and development. Disclosure of Invention In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a tensile reinforced mixing element, so as to solve the problem that the conventional single screw extruder in the prior art can achieve a dispersive mixing effect through high-strength shearing, but the molecular chain of the shearing sensitive material is easily degraded, resulting in the performance degradation of the material. A stretch enhancing mixing element comprising: the stretching component comprises a first rotating body capable of rotating around a rotating central shaft and a plurality of baffle plates circumferentially distributed around the first rotating body, and a thin groove for a flow to pass through is formed between two adjacent baffle plates; At least one shearing part, the shearing part comprises a second rotating body capable of rotating around a rotating central shaft, the outer surface of the second rotating body is provided with a plurality of spiral screw edges and screw grooves formed between two adjacent screw edges, and the depth of the screw grooves gradually changes along the spiral direction; The stretching component is in transmission connection with the shearing component. In particular, the baffle plate of at least one of the stretching components is a U-shaped baffle plate. In particular, the baffle of at least one of the stretching members is an S-shaped baffle. Specifically, the included angle between the central line of the S-shaped baffle plate along the length direction and the tangent line of the first rotating body is alpha, and the following condition that alpha is more than or equal to 0 degrees and less than 90 degrees is satisfied. Specifically, α is 0 ° or 30 °. Specifically, the outer side surface of the first rotating body is provided with a plurality of trapezoid curved surfaces which are opposite in direction and are arranged in a complementary manner along the circumferential direction, and the S-shaped baffle plate spans two adjacent trapezoid curved surfaces. Specifically, the depth of at least one screw groove is from large to small along the screw direction, and the depth of at least one screw groove is from small to large along the screw direction. Specifically, a baffle for choking flow is arranged at the position with the minimum depth of the spiral groove. Specifically, the stretching component and the shearing component are all provided with a plurality of stretching c