Method for manufacturing one-step formed composite foamed plastic formwork

Abstract

The invention relates to a method for manufacturing a one-step formed composite foamed plastic formwork which comprises an upper surface layer, a lower surface layer and a core layer. The method comprises the following steps of: firstly, filling a core layer raw material into a high-speed mixing machine to perform mixing; secondly, sending the mixed core layer raw material into a double-screw extruder by a feeding machine, extruding the extruded material into a core layer extruder, and simultaneously sending surface layer raw materials into a plastic extruder; and thirdly, extruding the extruded core layer raw material, the upper surface layer raw material and the lower surface layer raw material into a confluence distributor, molding the materials in a mold, and performing three-roller press finishing or vacuum shaping, cooling and cutting to obtain a finished product. The method overcomes the defects that the plastic formwork has rigidity and tenacity; the plastic formwork can be extruded out with three layers or a plurality of layers and has a more reasonable structure; the middle part of the plastic formwork is a foam material; the weight of the plastic formwork is light; the plastic formwork plays a role in heat insulation and simultaneously reduces the abuse of large heat shrinkage rate of plastic, can be recovered for 100 percent, has more turnover times, high rigidity, cold resistance, high temperature resistance, corrosion resistance, acid and alkali resistance, easy demoulding and low production cost; besides, the plastic formwork can be customized to be made into any sizes, has fewer building wallboard seams, and has the advantages of making a wall body smoother and evener, saving more materials and the like.

Description

technical field [0001] The invention relates to a manufacturing method of a foamed plastic formwork used in the construction field. Background technique [0002] At present, the building formwork used in various construction fields are mainly steel material formwork, wood material formwork and plastic formwork. Although the steel material formwork has a strong structure and can be reused many times, it is easy to bond with the concrete during use, difficult to demould, and is heavy and easy to corrode, especially if it is eroded by water for a long time, it is easy to rust and rot , the number of repeated use is greatly reduced, and the service life is easily limited by these problems. The wood material formwork is a formwork made of wood, which is easy to rot and deform after being impregnated by water, and it will be glued and layered after being used for several times. and harm to humans. Ordinary plastic formwork has the disadvantages of large specific gravity, easy d...

AI Technical Summary

Problems solved by technology

Although the steel material formwork has a strong structure and can be reused many times, it is easy to bond with concrete during use, it is difficult to demould, and it is heavy and easy to corrode, especially when it is eroded by water for a long time, it is easy to rust and rot , the number of repeated uses is greatly reduced, and the service life is easily limited by these problems

The wooden material formwork is easy to rot and deform after being impregnated with water, and after a few times of use, it will be glued and layered and cannot be used, resulting in a large waste of wood and greatly increasing the construction cost. Construction waste brings the environment harm to humans

Ordinary plastic formwork has disadvantages such as high specific gravity, high temperature deformation, cold and fragile, less repeated use, rigidity but no toughness, and specifications cannot be adjusted arbitrarily.