Extruding device of irregular cross section product

Abstract

The invention discloses an extruding device of an irregular cross section product, relating to the technical field of extrusion moulding equipment. The extruding device of the irregular cross section product mainly comprises an extruding system, a melt converging device, melt planetary gear pumps, a melt planetary gear pump transmission and control device, a melt planetary gear pump temperature control device, branch flow channels, a branch flow channel temperature controlling device, a branch flow channel connectors, a machine head, inner branch flow channels in the machine head, a damping device, a moulding flow channel, a die, a die adjusting device and a machine head temperature control device, wherein the outlet of each melt planetary gear pump is connected with one corresponding branch flow channel; the grouping of the branch flow channels is determined according to the cross section shapes of the product, and the grouped branch flow channels are connected with the branch flow channel connector and then the branch flow channel enters a machine head for moulding. Compared with the traditional manner, the manner in the invention is easy to meet the requirement of the change ofthe cross section only through changing the flow channels in the machine head, the change of the flow channel in the machine head plays the role of locally fine tuning, and the flow ratio of the meltmaterial of each part is determined before the melt material flow enters the machine head, thereby overcoming the difficulties that the prescribed accuracy in processing the large-scale machine head is high and is difficult to realize.

Description

technical field [0001] The invention relates to the technical field of extrusion molding equipment, in particular to an extruder capable of extruding large shaped 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 consu...

AI Technical Summary

Problems solved by technology

[0004] At present, extruded shaped products are generally obtained through an extruder and a specific head, a shaping device, and a cooling device. After the melt plasticized by the extruder is extruded from the front end of the extruder, it flows through the head. The change of the channel transitions to the required cross-sectional shape. After a period of stable flow in the machine head, it leaves the die of the machine head and enters the shaping device and cooling device to obtain the product. Due to this form, the cross-section of the flow channel is different everywhere. , the flow pressure is different, it is very difficult to control the flow velocity at the outlet to be consistent, the cost of mold repair is high, and sometimes the mold needs to be reprocessed, resulting in a lot of waste

This problem is more difficult to adjust due to the low extrusion pressure when making large special-shaped cross-section products

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