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Semicircular-edge screw for plastic extruder

A plastic extruder, semi-circular technology, applied in the field of extruder parts, can solve the problems of poor plasticizing effect and low output of separate screw, and achieve the effect of improving production efficiency, easy to climb over, and smooth flow

Inactive Publication Date: 2010-11-24
南京艺工电工设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to design a semicircular helicoid screw for plastic extruders with high output and good plasticizing effect in view of the problems of low output and poor plasticizing effect of the existing separation type screw.

Method used

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  • Semicircular-edge screw for plastic extruder
  • Semicircular-edge screw for plastic extruder
  • Semicircular-edge screw for plastic extruder

Examples

Experimental program
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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0015] Such as figure 1 -3 shown.

[0016] A semicircular flight screw for a plastic extruder, comprising a screw body 1, the entire length of the screw body 1 is provided with two identical main flight 2 and two identical auxiliary flight 3, the main screw The schematic diagram of the normal section of the rib 2 and the secondary flight 3 is shown in Figure 3, the two secondary flight 3 and the corresponding two main flight 2 are closed at the discharge end 5 of the screw body 1, and change The lead starts again, and the bottom diameter of the spiral groove of the screw body 1 is a gradual structure from the feed end 4 to the discharge end 5. Taking the φ150 screw as an example, the diameter of the spiral groove bottom of the feed end 4 is φ100-130. The diameter of the bottom of the spiral groove to the discharge end is φ105-135; the normal section o...

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Abstract

The invention provides a semicircular-edge screw for a plastic extruder, which comprises a screw body (1), wherein two identical primary screw edges (2) and two identical secondary screw edges (3) are arranged at the overall length of the screw body (1); the two secondary screw edges (3) and the two primary screw edges (2) corresponding to the two secondary screw edges (3) are connected and closed at the discharging end (5) of the screw body (1); the semicircular-edge screw is characterized in that the bottom diameter of the spiral groove of the screw body (1) is gradually changed from an feeding end (4) to the discharging end (5); and the normal section of the secondary screw edges (3) are in a semi-circular structure which ensures that the materials can be overturned more smoothly.

Description

technical field [0001] The invention relates to an extruder part, in particular to a screw for a PVC extruder, in particular to a semicircular flight screw for a plastic extruder. Background technique [0002] As we all know, the screw of PVC extruder usually adopts the following two structures: one is the common three-section type (ie, feeding section + compression section + metering section); It can be composed of a front flight and a rear flight with different leads, or it can be composed of a main flight and an additional flight. Although the separation screw has improved plasticizing quality and extrusion volume compared with the three-stage screw, it still cannot meet the increasing requirements of users in terms of output, so the developed extrusion volume is larger and the plasticizing effect is better. The screw has become an increasingly urgent task. Contents of the invention [0003] The object of the present invention is to design a semi-circular flight screw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/62B29C48/65
CPCB29C47/625B29C48/65
Inventor 陈辉殿蒋欣张祖波黄峻喜
Owner 南京艺工电工设备有限公司
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