Method for producing multi-specification plastic pipe material by fixed diameter-opening mould and its ram-head mould

Abstract

The invention is concerned with the method and the bolt head mould for using the sizing opening-module to produce multi-standard plastic pipe, the method is: puts in the material, heats to melt, extrudes, sizing cooling, tows, cutting to length, the heating melted material extrudes from the opening module, then tows in the sizing mould, the inside diameter of the opening mould is bigger that the inside diameter of the sizing mould, the linear velocity ratio of the heating melted material extrusion and the sizing cooling produce is U<=1, the inside cavity diameter of the opening mould is bigger than the inside cavity diameter of the sizing mould, between the opening mould and the sizing mould is a gap. The features of the invention are: can produce multi-standard pipe, save material, improve efficiency, high output.

Description

1. Technical field [0001] The invention belongs to the technical field of plastic pipe processing and production methods and equipment thereof, and in particular relates to a method for producing multi-standard plastic pipes with fixed-caliber dies and a special die for the die. 2. Background technology [0002] At present, the production of plastic pipes generally uses a set of molds to produce a variety of plastic pipes. The size of the die is slightly smaller than the size of the sizing sleeve. Under this production method, the extrusion line speed of the raw material is basically the same as the product pulling line speed. Although this method can meet certain needs, due to the limitation of its production process, when producing pipes of different specifications , It is necessary to replace the die, core die and sizing die. This is a waste of raw materials, so that the raw materials that have been melted in the die and core die can only be treated as waste materials. Se...

AI Technical Summary

Problems solved by technology

[0002] At present, the production of plastic pipes generally uses a set of molds to produce a variety of plastic pipes. The size of the die is slightly smaller than the size of the sizing sleeve. Under this production method, the extrusion line speed of the raw material is basically the same as the product pulling line speed. Although this method can meet certain needs, due to the limitation of its production process, when producing pipes of different specifications , It is necessary to replace the die, core die and sizing die. This is a waste of raw materials, so that the raw materials that have been melted in the die and core die can only be treated as waste materials. Second, it is necessary to stop the machine to replace different molds, which reduces production Efficiency reduces effective production man-hours and increases production costs such as power consumption for reheating the engine

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