Composite wood-plastic material blow molding machine

Abstract

The composite wood-plastic material blow molding machine is one parallel double screw extruder provided with storage cylinder and mold closing device. The parallel double screw extruder has outlet communicated with the storage cylinder, and the storage cylinder has outlet over the mold closing device. The composite wood-plastic material blow molding machine has the functions of deairing, mixing, forming at low temperature and low pressure and eliminating residual stress, and is used in forming composite wood-plastic material product in high quality.

Description

technical field [0001] The invention relates to wood-plastic composite (WPC) processing and molding equipment, in particular to a wood-plastic composite blow molding machine. Background technique [0002] At present, the molding processing technology of wood-plastic composite (WPC) at home and abroad has extended from the field of extrusion molding to the field of injection molding. Like wood-plastic extrusion molding, although the rheological properties of wood-plastic composite materials are quite different from those of ordinary plastic materials, the injection molding of wood-plastic materials still starts from ordinary plastic injection molding machines. It is found in practice that the current wood-plastic injection molding mainly has the following four problems that need to be solved urgently: [0003] First, the relative strength of the product is low [0004] This is because the melt flow properties of wood-plastic composite materials are very poor, and injection ...

AI Technical Summary

Problems solved by technology

[0003] First, the relative strength of the product is low

[0004] This is because the melt flow properties of wood-plastic composite materials are very poor, and injection molding requires the melt of the material to flow easily, which determines that the matrix resin in wood-plastic composite materials must have high fluidity, that is, the molecular weight is relatively low, so From the material point of view, there is a prominent problem of low product strength

[0005] Second, product warping deformation

[0007] Third, the initial performance of the material cannot be well maintained to the final product

[0008] Due to the high processing temperature, injection pressure, and shear rate of injection molding, the degradation and coking of materials (especially plant fiber parts) occur at any time, so the initial properties of materials are difficult to maintain to the final product as the processing progresses.

[0009] Fourth, the influence of moisture and the surface of low volatile products

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