Stone-plastic composite board extrusion molding process

Abstract

The invention discloses a stone-plastic composite board extrusion molding process which comprises: mixing 60% to 70% of modified waste mineral powder, 20% to 25% of PVC (polyvinyl chloride) resin powder, 0 to 1% of stearic acid, 1% to 2% of paraffin, 3% to 6% of PVC calcium-zinc composite stabilizer, 1% to 3% of acrylic resin and 1% to 3% of chlorinated polyethylene, and preparing to obtain a PVCcompound material through a PVC compound material applicable to extrusion molding; adding the PVC compound material into a double-screw extruder by a quantitative feeding system, adopting four-stage temperature control, and extruding at a high temperature; enabling die head position static mixers to adopt four-stage temperature control, carrying out vacuum sizing by 2 to 4 serial die heads on a vacuum sizing table, and then carrying out processes of water cooling, air drying, crawling traction, cutting and the like to form a stone-plastic composite board. The stone-plastic composite board extrusion molding process disclosed by the invention is low in equipment investment, low in energy consumption and low in pollution, has the advantages of PVC plasticizing uniformity, difficulty in decomposition, high production efficiency, low defective rate, long screw service life and the like, and provides a matured and reliable extrusion molding process for the stone-plastic composite board.

Description

technical field [0001] The invention belongs to the field of extrusion of plastic plates, and in particular relates to an extrusion molding process of stone-plastic composite plates. Background technique [0002] The stone-plastic composite board is a new type of high-performance, high-value-added board that uses waste rock ore powder, waste tailings powder, and industrial solid waste as the main raw materials. After proper treatment, it can be combined with various plastics through different composite methods Composite materials, developed on the basis of wood-plastic composite board production, are considered to be an international innovative technology in the 21st century and the most fashionable new home decoration building materials. A professional manufacturer of stone-plastic floor materials. However, in the actual production process, there are often problems that the waste and resin cannot be uniformly plasticized, the produced products are prone to breakage, the ra...

AI Technical Summary

Problems solved by technology

However, in the actual production process, it often occurs that the waste and resin cannot be uniformly plasticized, the produced product is prone to breakage, the rate of defective products is high, the waste will damage the screw of the extruder, and the life of the screw is short.

Especially for PVC resin, this problem is more obvious, and there are serious dust problems and PVC decomposition problems, which will aggravate the adverse effect on product quality, reduce the service life of the screw, and worsen the production environment of the product.