Method for forming wood plastic section bars with polyvinyl chloride (PVC) cladding layer and extrusion mould

Abstract

The invention relates to a method for forming wood plastic section bars with polyvinyl chloride (PVC) cladding layer and an extrusion mould. The method comprises the following steps of: adding a wood plastic base material into an extrusion mould from a mould head feeding port; extruding the wood plastic base material toward a mould outlet by a main flow channel after the wood plastic base material is added into the extrusion mould; adding PVC powder from a co-extrusion material flow channel charging port of the extrusion mould when the wood plastic base material is extruded to a section bar base material forming area; and extruding the mixed base material from a mould outlet after the added PVC powder and the wood plastic base material are mixed at an outer wall pre-forming flow channel so as to obtain the wood plastic section bars with the PVC cladding layer. By the method and the equipment, the wood plastic door / window main section bars with the PVC cladding layer can be manufactured, and the main section bars have the advantages of environment friendliness, resolvability and low cost; and the manufactured wood plastic door / window main section bars are environment-friendly and can preserve the advantages of attractiveness, anti-aging and the like of the conventional PVC section bars.

Description

technical field [0001] The invention relates to a molding method of a wood-plastic profile with a PVC coating layer and an extrusion die thereof, in particular to a molding method of a main profile of a wood-plastic door and window with a PVC coating layer and an extrusion die for realizing the method . Background technique [0002] The profiles of plastic doors and windows are mainly made of PVC, but PVC powder is derived from petroleum products and is a non-renewable resource. In order to better exert the energy-saving advantages of plastic doors and windows, people hope to replace PVC powder by recycling waste materials Material, and wood-plastic composite material is a good material, so using wood-plastic material instead of PVC powder to quote the main profile of doors and windows can reduce material costs. However, in practice, considering the beauty of the outer surface of the main profiles of doors and windows, a small amount of PVC powder is usually coated on the s...

AI Technical Summary

Problems solved by technology

Existing extrusion dies such as CN201010570918.10 and CN201010572539.40, these two extrusion dies realize the co-extrusion of the same raw material, that is, the co-extrusion of PVC and PVC, but cannot realize the co-extrusion of different materials, so it is necessary to design A kind of molding method and extrusion die of wood-plastic profile with PVC cladding layer

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