Ceramic slip material injection arrangement - has metering cylinder with piston and valve ensuring correct mould filling

The arrangement includes a piston sliding in a cylinder. The cylinder metering chamber contains the slip which is injected through nozzles into the cavity of a mould. The mould consists of a liquid-permeable porous material which, however, retains ceramic particles. The slip is accurately metered to completely fill the mould chamber without overloading. No air penetrates into the metering chamber, ensuring accurate metering. Number of moving parts is reduced to ensure that material debris does not adversely effect formed blanks. The injection piston has a valve seat, and the coating element which moves along the axis of the cylinder acts in conjunction with the valve seat and the nozzle. Supply of slip into the metering chamber is prevented during the injection movement. During the return movement of the injection piston the supply to the metering chamber is released and connection between the metering chamber and mould cavity is blocked.