METHOD FOR FEEDING PASTY MASSES AND PUMP DEVICE FOR FEEDING PASTY MASSES

摘要

A method for feeding pasty masses using a pump device which has a piston pump with at least two cylinders, each having one piston, is disclosed. Each cylinder of the pump device is connected to a pre-fill container via an inlet opening and to a feed line via an outlet opening. Pasty mass is fed from the pre-fill container into the respective cylinder during a suction stroke of a cylinder with the inlet opening open and the outlet opening closed, and pasty mass is fed into the feed line during a pump stroke of a cylinder with the outlet opening open and the inlet opening closed. The piston velocity is greater during the suction stroke than during the pump stroke. Near or at the end of the suction stroke, the inlet opening is closed, whereafter the pasty mass is compressed in the cylinder before the outlet opening is opened.