PROCESS AND DEVICE FOR PRODUCING PLASTIC MOLDINGS FROM FLOWABLE REACTION MIXTURE

摘要

PURPOSE: A process and device for producing plastic moldings from a flowable reaction mixture is provided to prevent foam formation at the beginning of a shot including when the mixing chamber is emptied after each shot. CONSTITUTION: Polyurethane molded articles are produced from a flowable polyolpolyisocyanate reaction mixture on a shot-wise basis. The flowable reaction mixture is formed by combining the components of that mixture in the mixing chamber(2) of a mix head(1). The contents of the mix head are introduced(preferably via an outlet pipe) into a mold in a manner such that the mixing chamber is substantially emptied in each case. Any ambient gas in the mixing chamber is then removed before the respective next shot is initiated.