CN219153684U

CN219153684U - Reducing thread block for double-screw extruder

Info

Publication number: CN219153684U
Application number: CN202223581302.1U
Authority: CN
Inventors: 杨高品
Original assignee: Suzhou Pupeishan Technology Co ltd
Current assignee: Suzhou Pupeishan Technology Co ltd
Priority date: 2022-12-31
Filing date: 2022-12-31
Publication date: 2023-06-09
Anticipated expiration: 2032-12-31

Abstract

The utility model discloses a variable-diameter screw block for a double-screw extruder, which comprises a screw block body, wherein a mandrel mounting hole is formed in the center of the screw block body and is connected with a mandrel, the screw block body is used in pairs, two end faces are installed in parallel and mutually meshed for rotation, the surface of the screw block body is provided with integrally formed gradual change screw edges, and screw grooves with the same depth are formed in two sides of the screw edges. The utility model changes the groove depth ratio of the screw thread blocks through the gradual change of the screw thread external diameter, obtains larger screw groove volume, improves the feeding capacity of the extruder, and the gradual change of the groove depth ratio also prolongs the heating time of the material, so that the material is plasticized and melted more fully, and has higher practical value.

Description

Reducing thread block for double-screw extruder

Technical field:

the utility model belongs to the technical field of extruders, and particularly relates to a variable-diameter thread block for a double-screw extruder.

The background technology is as follows:

in the field of polymer processing today, an extruder is a common high polymer processing mechanical device and is widely used for polymer blending, modification and extrusion molding. The extruder is classified into a single screw extruder, a twin screw extruder, a multi screw extruder, etc. according to the number of screws thereof. The twin-screw extruder is widely popularized and used with the advantages of being suitable for powder processing, heat-unstable materials, good in self-cleaning performance, strong in mixing effect and the like, and the twin-screw extruder main body comprises a machine barrel and a screw inside the machine barrel, wherein the screw generally comprises a thread block and a mandrel, and common mixing elements comprise the thread block and a kneading block.

In recent years, with the continuous development and application of the whole extruder industry, extrusion equipment is developed towards high torque, high yield and low energy consumption, and under the condition that the torque is enough, the material of the current screw thread block and the matched processing and heat treatment process are also greatly improved, so that the conventional screw thread block cannot meet the increasing high-yield requirement and ensure higher melt plasticization.

The utility model comprises the following steps:

the utility model aims to provide a reducing thread block for a double-screw extruder, so as to solve the problems in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a reducing screw thread piece for twin-screw extruder, includes the screw thread piece body, dabber mounting hole has been seted up at the center of screw thread piece body and is linked to each other with the dabber, the screw thread piece body is used in pairs, and both ends face parallel installation, intermeshing rotates, the surface of screw thread piece body is equipped with integrated into one piece's gradual change screw edge, the screw groove has been seted up to screw edge both sides.

Preferably, the mandrel mounting hole and the mandrel can be in flat key connection or involute spline connection distributed in a circumferential structure.

Preferably, the screw thread block bodies are used in pairs, the screw thread block bodies have the same screw direction and can be left-handed or right-handed, and the number of screw threads can be single-ended, double-ended or more.

Preferably, the groove depth ratio formula of the screw thread block body is: groove depth ratio = screw edge outer diameter/screw groove outer diameter, screw groove outer diameter is unchanged, screw edge outer diameter gradually changes from big to small, and groove depth ratio is between 1.5 and 1.9.

The variable-diameter thread block for the double-screw extruder provided by the utility model has the following technical effects and advantages: the variable-diameter screw thread block changes the traditional screw edge outer diameter into a gradual change form from large to small, increases the groove depth ratio of the initial end, obtains larger screw groove volume, improves the feeding amount, prolongs the stay time of materials in a machine barrel due to the increase of the surface area of the screw thread block of the initial end, prolongs the heating time of the materials, is beneficial to absorbing heat, and can promote the melting and plasticizing of the materials.

Description of the drawings:

FIG. 1 is an isometric view of a variable diameter flighted block for a twin screw extruder in accordance with the present utility model;

FIG. 2 is a schematic front view of a right-handed variable diameter flighted block for a twin screw extruder in accordance with the present utility model;

FIG. 3 is a schematic front view of a left-hand variable diameter flighted block for a twin screw extruder in accordance with the present utility model;

FIG. 4 is a schematic end view of a flat key connection of a variable diameter flighted block for a twin screw extruder in accordance with the present utility model;

in the figure, 1, a screw block body, 2, a screw groove, 3, screw edges and 4, a mandrel mounting hole.

The specific embodiment is as follows:

the following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in FIG. 1, the variable-diameter screw block for the double-screw extruder comprises a screw block body, wherein a mandrel mounting hole is formed in the center of the screw block body and is connected with a mandrel, the screw block body is used in pairs, two end faces are installed in parallel and rotate in a meshed mode, the surface of the screw block body is provided with integrally formed gradual change screw edges, and screw grooves are formed in two sides of the screw edges.

Further, the mandrel mounting hole and the mandrel can be in flat key connection or involute spline connection distributed in a circumferential structure.

Furthermore, the screw thread block bodies are used in pairs, the screw thread block bodies are the same in rotation direction and can be left-handed or right-handed, and the number of screw threads can be single-ended, double-ended or more.

Further, the groove depth ratio formula of the thread block body is as follows: groove depth ratio = screw edge outer diameter/screw groove outer diameter, screw groove outer diameter is unchanged, screw edge outer diameter gradually changes from big to small, and groove depth ratio is between 1.5 and 1.9.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. Variable-diameter screw block for a twin-screw extruder, comprising a screw block body (1), characterized in that: the center of screw thread piece body (1) has seted up dabber mounting hole (4) and has linked to each other with the dabber, screw thread piece body (1) use in pairs, and both ends face parallel installation, intermeshing rotates, the surface of screw thread piece body (1) is equipped with integrated into one piece's gradual change screw rib (3), screw groove (2) have been seted up to screw rib (3) both sides.

2. A variable diameter flighted block for a twin screw extruder according to claim 1 wherein: the mandrel mounting holes (4) and the mandrel can be in flat key connection or involute spline connection distributed in a circumferential structure.

3. A variable diameter flighted block for a twin screw extruder according to claim 1 wherein: the screw thread block bodies (1) are used in pairs, the screw thread directions are the same, the screw thread blocks can be left-handed or right-handed, and the number of screw threads can be single-ended, double-ended or more.

4. A variable diameter flighted block for a twin screw extruder according to claim 1 wherein: the groove depth ratio formula of the thread block body (1) is as follows: groove depth ratio = outside diameter of screw rib (3)/outside diameter of screw groove (2), outside diameter of screw groove (2) is unchanged, outside diameter of screw rib (3) gradually changes from big to small, and groove depth ratio is between 1.5-1.9.