Manufacturing method of plastic foamed extrusion wood-like plate

Abstract

A manufacturing method of a plastic foamed extrusion wood-like plate is disclosed. According to the manufacturing method, raw materials are weighed in proportion, wherein the raw materials comprise, by weight, 30-90% of high impact polystyrene (HIPS), 10-20% of inorganic mineral, 10-70% of high impact polystyrene (HIPS), 5-10% of wax, 0-5% of polymethyl methacrylate (PMMA), 0-5% of polycarbonate (PC) and 0-5% of engineering plastics (ASA); the raw materials are fully mixed; the uniformly-mixed raw materials are put into an extruder, extrusion pressure of the extruder is adjusted to 15-45 MPa and temperature is adjusted to 130-190 DEG C until the raw materials are fully fused and uniformly flow; and the fused materials are put into setting and cooling equipment, and a setting mold filled with the fused materials is put into water of 0-25 DEG C to be cooled in water bath for cooling and setting, so as to obtain a plastic foamed extrusion wood-like plate. Wood grain of the prepared wood-like plate is random, thus achieving a vivid wood-like effect.

Description

technical field [0001] The invention relates to a method for manufacturing boards, in particular to a method for manufacturing plastic foamed and extruded imitation wood boards. Background technique [0002] In the production of plastic extruded boards, in order to form natural wood textures on the surface of the boards, the technology of printing on the surface of the boards is used to achieve the effect of imitating wood. The textures can only exist on the surface of the boards. During processing, the wood grain effect on the surface of the product will be damaged; when the board is used outdoors, climate factors such as temperature and humidity will corrode the surface of the board, destroy the wood grain printed on the surface of the product, and reduce the simulation degree of the product; Texture, restricted by the printing plate, the texture is highly repetitive, lacks random changes, and the simulation effect is poor; in the production of plastic extruded (non-foamed...

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Problems solved by technology

[0002] In the production of plastic extruded boards, in order to form natural wood textures on the surface of the boards, the technology of printing on the surface of the boards is used to achieve the effect of imitating wood. The textures can only exist on the surface of the boards. During processing, the wood grain effect on the surface of the product will be damaged; when the board is used outdoors, climate factors such as temperature and humidity will corrode the surface of the board, destroy the wood grain printed on the surface of the product, and reduce the simulation degree of the product; Texture, restricted by the printing plate, the texture is highly repetitive, lacks random changes, and the simulation effect is poor; in the production of plastic extruded (non-foamed) boards, in order to form natural wood textures on the surface of the board, extruded Different colors are added to different positions of the extruder to achieve the wood-like effect. Generally, a sub-hopper is added at the rear of the extruder, and a color different from the background color is added through this sub-hopper. Since the sub-hopper is located in the extruder In the latter part of the process, after the color is added, it stays in the melting tube for a relatively short time, and it is not completely melted, thus forming a wood grain color in the formed sheet; this technology can only be applied to the extrusion of non-foamed sheets, and cannot be applied to foamed sheets. Extrusion of sheet materials; because in the extrusion process of foamed sheet materials, the raw materials need to maintain pressure in the melt tube for foaming. If a sub-hopper is added in the later stage, the pressure will decrease, which will affect the foaming process; therefore, it cannot be used This method carries out the extrusion of foam imitation wood board

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