Production technique of EPS (expandable polystyrene) foam articles

Abstract

The invention discloses a production technique of EPS (expandable polystyrene) foam articles. The production technique is characterized by comprising the following steps: pre-foaming, curing, feeding, preparing mould, heating and forming, water cooling, vacuum cooling, demoulding, trimming, drying, trimming, packaging and storing in warehouse, and the production technique improves the compressed air, water circular cooling and drying process. The technique disclosed by the invention has simple and reasonable technique procedures and utilizes two paths of compressed air supply systems, so that the pipeline pressure is very stable, an electromagnetic valve acts flexibly, a cylinder switching valve quickly and reliably acts, and a cooling water circulating system can quickly cool to improve the cooling efficiency, save the electric energy and vapor and reasonably utilize the energy sources; besides, a mixed mode of high and low temperature air is used, so that the articles are not deformed or expanded irrespective to the foaming density, the drying time is shortened and the resources are reasonably utilized.

Description

technical field [0001] The invention relates to the field of EPS foam products, in particular to a production process of EPS foam products. Background technique [0002] In the production process of EPS foam products, a large amount of compressed air is used. The commonly used compressed air supply system uses post-processing equipment such as air compressors, filters, and cold dryers. The air supply system has disadvantages: in the production process of EPS foam products, the treated purified compressed air only accounts for about 10% of the total air consumption, that is, solenoid valves, cylinders and other power sources; the remaining 90% of compressed air does not need Any post-processing, and a large amount of use in an instant, will easily cause large pressure fluctuations, which will inevitably cause unnecessary energy waste and increase the pressure fluctuations of the pipeline system, affecting the reliability of the solenoid valve action and the accuracy of the me...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to make up for the deficiencies of the prior art, and provide a production process for EPS foam products, which solves the problem that the existing gas supply structure is simple and easily causes large pressure fluctuations, which will inevitably cause unnecessary waste of energy and increase The pressure fluctuation of the pipeline system affects the reliability of the solenoid valve action and the accuracy of the mechanical action; the circulating cooling water uses the same water temperature regardless of the density of the product, and the cooling water of the vacuum pump also uses this circulating cooling water or directly uses tap water, the cooling effect is not good At the same time, it causes a waste of energy; the existing drying room has a simple structure. When drying EPS foam products with a density above 35kg / m^3, due to the high temperature of the air outlet, it is easy to bake and deform the products around the air outlet, resulting in Waste and other issues

Images