Wood plastic physical micro-foaming squeezing type injection molding machine and molding process

Abstract

The invention relates to a wood plastic physical micro-foaming squeezing type injection molding machine and a molding process, and belongs to the field of wood plastic production equipment. The machine comprises a dual-screw extruder and an injection machine and is characterized in that the dual-screw extruder comprises a material cylinder, two screws are arranged in the material cylinder, a hopper is arranged at the input end of the material cylinder, a material cylinder front body is arranged at the output end of the material cylinder, a connecting body is arranged below the material cylinder front body, a supercutical fluid injector is arranged at the side end of the connecting body, a first cavity is formed in the connecting body, the upper end of the connecting body communicates withthe material cylinder front body through the first cavity, the side end of the connecting body communicates with the supercutical fluid injector through the first cavity, a gear pump is arranged belowthe connecting body, the injector comprises an injection oil cylinder, an injection cylinder front body, and a nozzle, and the lower portion of the gear pump is connected with the injection cylinderfront body through a check valve. The problems that a wood plastic product is not uniform in size, product molding is large in brittleness, compactness is poor, cracking is prone, and density is largecan be solved. The machine is simple in whole structure and convenient to machine.

Description

technical field [0001] The invention relates to the technical field of wood-plastic material production equipment, in particular to a wood-plastic physical micro-foaming extrusion injection molding machine and a molding process under the trend of substituting plastic for wood and reducing the weight of materials. Background technique [0002] Wood-plastic composite material is a new type of composite material obtained by adding plant fibers such as wood, sisal hemp, bagasse, rice bran, bamboo powder, etc., as fillers in powdery or fibrous forms to thermoplastics, and compounding them through melt processing. . Compared with traditional wood materials, it has the advantages of beautiful appearance, water resistance, insect resistance, corrosion resistance, and not easy to crack. It is widely used to make wood substitute products, such as various packaging, pallets, warehouse pads or outdoor building materials, Public facilities, etc. In addition, most wood-plastic composite...

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a wood-plastic physical micro-foaming extrusion injection molding machine and molding process to solve the problem that gas is easily released during the physical foaming process of wood-plastic injection molding products. As well as the uneven size of the pores of the product, the brittleness of the product, poor compactness, easy cracking, and high density, the overall equipment structure is simple and easy to process

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