Press filter plastic filter plate moulding process and device

Abstract

The invention discloses press filter plastic filter plate moulding process and device. The moulding device is formed by sequentially connecting an extruder, a small-sized hydraulic machine and a large-sized hydraulic machine which are communicated by hot flow channels; the small-sized hydraulic machine mainly comprises a small-sized hydraulic machine lower base plate, a small-sized hydraulic machine upper base plate and a middle plunger type storing chamber; the large-sized hydraulic machine mainly comprises a large-sized hydraulic machine lower base plate, a large-sized hydraulic machine upper base plate and a middle filter plate moulding die; materials are extruded by the extruder, enter the plunger type storing chamber through the first hot flow channel for heat insulation, flow out of the plunger type storing chamber and enter the filter plate moulding die through the second hot flow channel for heat insulation, pressure maintaining, cooling and moulding; the invention is used for delivering flux to the filter plate moulding die in a constant-temperature, constant-speed and quantitative way, solves the problem of bubble inclusion in the filter plate, improves the strength of the filter plate, reduces the stress in the filter plate, prolongs the service life of the filter plate and has the advantages of less material overflow and material saving; and the surface of a seal surface of the filter plate is smooth, thereby reducing the secondary processing time and cost.

Description

technical field [0001] The invention relates to the field of mechanization and chemical engineering, in particular to a molding process and molding device for a plastic filter plate of a filter press. Background technique [0002] The molding methods of plastic filter plates include injection molding, compression molding and extrusion-compression-molding, etc., but all have fatal defects. The disadvantage of injection molding is that molecular orientation is prone to occur, resulting in a large orientation internal stress. During the use of the filter plate, the phenomenon of "convex belly" will occur, and in severe cases, it will even break, that is, "fried plate", and injection molding is large. The investment cost of the injection machine is high for the filter plate of the standard specification; compression molding is the main molding method of the plastic filter plate, and the disadvantage is that the molding cycle is long, and defects such as bubbles and shrinkage are...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the above-mentioned deficiencies in the molding process of the plastic filter plate, the purpose of the present invention is to provide a method that can maximize the mechanical properties of the plastic material, and can fundamentally solve the problem that the filter plate contains air bubbles, resulting in a decrease in the strength of the filter plate. Problems that affect the service life of the filter plate, and can reduce production costs, shorten the molding cycle, and improve production efficiency Plastic filter plate forming device for filter press

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