Extrusion moulding apparatus for large-scale macromolecular product and process thereof

Abstract

Disclosed are an extrusion molding apparatus for large-scale macromolecular product and the process thereof, wherein the moulding apparatus comprises an extrusion system, a melt collecting apparatus, a melt planet gear pump, a transmission and control apparatus for the melt planet gear pump, a temperature control apparatus for the melt planet gear pump, branch channels, a temperature control apparatus for the branch channels, branch channel connectors, a head body, branch channels inside the head, a damping device, a moulding channel, a die, a die adjusting device and a head temperature control apparatus. A strand of materials is divided into multiple strands by the molt planet gear pump, flows into the branch channels of the head body with uniform pressure, and then outflows the die under auxiliary adjustment of the damping device and die adjusting device. The invention overcomes the problem of difficulty in realizing high precision that large-scale heads are confronted with. The negative impact due to ambient temperature changes and difference in channel roughness, heat treatment of the head body materials and melt flow can be minimized by independently controlling the temperature of each segment through the temperature control apparatus for the branch channels.

Description

technical field [0001] The invention relates to the technical field of extrusion molding equipment, in particular to an extruder capable of extruding large polymer products and its molding process. Background technique [0002] Extrusion molding occupies a very important position in the plastic product molding processing industry. According to statistics, in the molding and processing of plastic products, the output of extrusion molding products ranks first. Compared with other molding methods, extrusion molding has the characteristics of continuous production, high productivity, wide application, low investment and quick return. With the wide application and development of plastic extrusion molding technology, the types of extruders are increasing. [0003] The extruder is high-speed and high-yielding, enabling investors to obtain greater output and high returns with lower investment. The high efficiency of the extruder is mainly reflected in high output, low energy cons...

AI Technical Summary

Problems solved by technology

However, the extrusion of large-scale products requires high precision of the molding die, especially when extruding thin-walled products with large diameters or films and sheets with large widths. Even if the processing precision of the die is high, if the temperature fluctuation along the die It will also affect the fluidity of the melt, thereby affecting the quality of the final product. In addition, due to the high extrusion output and low head pressure, the fluctuation of the plasticizing process of the extruder will also have a greater impact on the accuracy of the extruded product.

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