Production technology for hard PVC high foaming plate

Abstract

The invention discloses a production technology for a hard PVC high foaming plate. A fresh solvent barrel, a diaphragm pump, a fresh solvent storage groove, a charging tank, a kneader, a charge pump, a foaming machine, an automatic conveyor, a hot air circulation oven and a cutting machine, all of which are sequentially connected are included. A solvent recycling storage groove is further formed in front of the charging tank. A heating plate I, a die and a heating plate II are arranged in the foaming machine. The bottom of the heating plate I is connected with the top of the die, and the bottom of the die is connected with the top of the heating plate II. An inlet of the die is connected with an outlet of the charge pump, and an outlet of the die is connected with the kneader. Each of the heating plate I and the heating plate II is provided with a steam heating and circulation water cooling device. According to the production technology, the hardness and foaming ratio of the PVC foaming plate are greatly improved, and the problem that hard high foaming plate materials are unavailable for PVC in China at present is solved.

Description

technical field [0001] The invention relates to a production process of a PVC foam board, in particular, it is suitable for the production process of a rigid PVC high foam board. Background technique [0002] At present, the market of China's external wall thermal insulation system has just started, and the standards are not yet perfect, and there are many problems, the most prominent problem is the fire resistance level of thermal insulation materials. In terms of thermal insulation materials in my country, inorganic materials whose combustion materials can reach Class A only account for less than 10% of the market share, and their thermal insulation performance cannot be compared with many organic materials, and materials whose combustion materials can reach Class B1 account for less than 20% % market share, and its price is expensive. More than 70% of the rest are cheap combustible and flammable materials (polyurethane, polystyrene and other foam insulation materials, mos...

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problem of the production process of the current rigid PVC high-foaming board, provides a production process of the rigid PVC high-foaming board, obtains a rigid PVC high-foaming board with high hardness and high foaming ratio, and solves the problem of At present, domestic PVC rigid foam boards have low foaming ratio and low hardness of PVC high foam boards, which cannot be used as external wall insulation materials. The price is low and can replace expensive and flammable polyurethane, polystyrene and other foam insulation materials.

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