Screw extrusion melt pressure stabilizing device and method

The technology of a voltage stabilizer and a molten material is applied in the field of adjusting the fluctuation of extrusion pressure and the voltage stabilizer on the screw extruder, which can solve the problems of pressure fluctuation, large interference of continuous flow of materials, and inability to meet precision extrusion processing. To achieve the effect of reliable sealing and simple structure
CN1435310AInactive Publication Date: 2003-08-13BEIJING UNIV OF CHEM TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIJING UNIV OF CHEM TECH
Publication Date
2003-08-13
Estimated Expiration
Not applicable · inactive patent

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Abstract

A pressure stabilizer for the molten material extruded out by screw extruder is characterized by that a connecting body with pressure stabilizing hole on its side wall is arranged between the cylinder and head piece of extruder, and a pressure stabilizing part driven by its driver moves in said pressure stabilizing hole to apply or release the pressure to or from the extruded material which flows through the central channel of said connecting body. Its method includes sensing the pressure value of the extruded material, comparing it with its setting, and controlling the movement of said pressure stabilizing part.
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Description

(1) Technical field

[0001] The invention relates to a melting extrusion processing machine, in particular to a pressure stabilizing device on a screw extruder and a method for adjusting fluctuation of extrusion pressure. (2) Background technology

[0002] In the processing of polymers, the screw of the screw extruder not only plays the role of melting, mixing and conveying materials, but also plays the role of building pressure. However, in the process of extrusion, due to the nature of materials, feeding Influenced by many factors such as fluctuations, the proportion of recycled materials, changes in operating process conditions, etc., the pressure fluctuations when the melt flows out of the extruder head are relatively large, resulting in a decrease in the uniformity of the extruded material and affecting the quality of processing. When extruding polymer products, the dimensional error caused by pressure fluctuations can reach about 4%, which is one of the main reasons for...

Claims

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