RU94030599A - Method for manufacture of products from foam plastic and device for its embodiment - Google Patents

Abstract

FIELD: manufacture of porous products from foam plastic for instance, containers or heat-insulating blocks. SUBSTANCE: method for manufacture of products from foam plastic includes preliminary foaming of material granules, their weathering, supply of foamed granules into mold with perforated walls, and placing of the mold with material to reaction chamber; supply of steam to the chamber with isobaric holding to obtain material sintered mass and abrupt throw off of pressure down to atmospheric one with subsequent cooling of finished product. Steam is supplied by pulses with abrupt rise of pressure up to 1.5 atm and its release to 1.17 atm necessary for isobaric holding of material. Duration of steam feed pulse to chamber amounts to not more than 0.2 s. The device for embodiment of the method for manufacture of products from foam plastic includes reaction chamber with valve for pressure release, mold with perforated walls and accommodated in the reaction chamber, product molding control block and steam supply system connected with reaction chamber and product molding control block. Steam supply system presents steam generator located in the reaction chamber and containing thermocouple and unit supplying water to the thermocouple with metering device. Metering device, outlet is located above the thermocouple. Metering device, thermocouple and pressure release valve are connected with product molding control unit. EFFECT: simplified technological equipment for manufacture of products from foam plastic with preservation of high quality of these products. 2 cl, 2 dwg

Claims (1)

The invention relates to the field of production of porous foam products, for example containers or heat-insulating blocks. The method and device for implementing this method can simplify the processing equipment for the manufacture of foam products while maintaining the quality of these products. The method includes pre-foaming the granules of the material, keeping them aged, feeding the foamed granules into a mold with perforated walls and placing the mold with the material in the reaction chamber, feeding steam into the chamber under pressure with isobaric exposure until a sintered mass of material is obtained and the vapor pressure drops sharply to atmospheric followed by cooling of the finished product. Steam is supplied in the form of a pulse by a sharp increase in pressure to 1.5 atm and depressurization to 1.17, which is necessary for isobaric exposure of the material. The duration of the steam pulse when it is fed into the chamber is not more than 0.2 s. The device includes a reaction chamber with a valve for depressurizing, molds with perforated walls placed in the reaction chamber, a control unit for forming the products and a steam supply system associated with the reaction chamber and the control unit for forming the products. The steam supply system is a steam generator located in the reaction chamber and containing a thermocouple and a unit for supplying water to the thermocouple with a dispenser. The outlet of the dispenser is located above the thermocouple. A dispenser, a thermocouple and a valve for relieving pressure from the chamber are connected to the control unit for the process of forming products. 2 s.p. f-ly, 2 ill.