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

摘要

A pump device for feeding pasty masses includes a piston pump having a cylinder with a piston connected to a pre-fill container via an inlet. The inlet is delimited by an orifice plate closeable with a slide valve. The slide valve includes pivotable base body, a housing and a closure surface facing inside the housing. The closure surface is formed at least partially by a surface of a valve piston movable relative to the base body. The valve piston enters a hollow space formed in base body when a pressure from the pasty masses is applied to valve piston from inside the slide valve housing. The valve piston enters the hollow space compressing a fluid. A cutting ring constructed as an annular piston having a surface facing the hollow space is pressed in a closed position of the inlet slide valve against the orifice plate by pressure from the fluid.