METHOD OF FABRICATION OF PRODUCTS FROM FOAM PLASTIC AND DEVICE FOR ITS REALIZATION Russian patent published in 1997 - IPC

FIELD: production of porous items from foam plastics. SUBSTANCE: device is furnished with moulding process control unit 4 and a steam generator placed in reaction chamber 1. The steam generator uses thermocouple 5 and unit 6 intended to supply water to thermocouple 5. Unit 6 has portioner 7, whose outlet connection 8 is positioned over thermocouple 5. Portioner 7, thermocouple 5 and pressurrelief valve 2 are connected to unit 4. During device operation a portion of water is fed to thermocouple 5, it instantly evaporates building up a steam pressure of about 1.5 atm at a temperature of 110-130 C. Valve 2 operates for 0.1-0.2 s and releases pressure down to 1.17-1.2 atm; as a result, a steam impulse is produced, which acts on the material in moulds 3 uniformly warming it up. EFFECT: facilitated procedure. 5 cl, 2 dwg