PROCESS AND APPARATUS FOR THE PRODUCTION OF MOULDED ARTICLES

摘要

The specification describes a process and apparatus constructed for this process, for dotting moulding tools with droplets of liquid or suspended lubricant in the production of shaped articles in the pharmaceutical, food or catalyst fields. Pressurized lubricant solutions or suspensions and pressurized gas are alternately passed through capillaries, in conjunction with alternating singlesubstance nozzles, in such a way that drops are formed on the nozzle surfaces, in between the jets of gas, and are then detached from the surfaces and directed to specific zones of pressing tools. The apparatus comprises fast-acting valves for the brief release of pressurized gases and lubricant liquids or suspensions, and the delivery lines of a gas valve and a liquid valve combine upstream of a capillary and single-substance nozzles are mounted at the end of the capillaries. The specification also describes so-called dotting shoes which contain a plurality of capillaries and nozzles, the latter in specific arrangements relative to one another.