Abstract: The instant invention relates to a process and an apparatus for applying a layer of liquid, foamable reaction mixture to a continuously moving support, such as for the production of foam blocks or foam sandwich panels having a thick foam core.

Abstract: An apparatus is disclosed for producing foam from two or more flowable chemical components where a filler material, such as waste foam, is added to one or more of the components prior to mixing and foaming. The charging mechanism for mixing the filler and component comprises a component feed pipe and a filler feed screw having a tubular housing. The discharge opening of the feed screw projects axially into the feed pipe so as to form an annular slot between the feed pipe and the housing to which slot the pipe from the dosing pump is connected, one end of the feed pipe being sealed to the housing.

Abstract: The instant invention is directed to a method and apparatus for measuring the proportion of undissolved gas in a liquid component for the production of foam materials, particularly, those based on polyurethane. The method is based on the equation of state of ideal gases (Boyle-Mariot Law: P .sup.. V = constant) at constant temperatures. The gas contained in a liquid component charged with gas increases its volume under expansion according to the above equation. The gas expansion causes expansion of the liquid gas mixture. The difference in the volumetric flow rate of the liquid, at two differing pressures, is therefore a measurement of the quantity of gas present in the liquid. The apparatus consists of one volumetric flow rate measurement unit connected upstream of a pressure drop unit, a second volumetric flow rate measurement unit connected downstream of the pressure drop unit and a differential value indicator connected to the first and second volumetric flow rate measurement units.