Cascade Technology

In cascade injection moulding several nozzles are operated either behind or above one another. The mould is filled with the plastic melt through several needle fine nozzles which are positioned in a heated channel system. When, for example, three needle nozzles are situated in the heated channel the middle nozzle is opened first and the melt is injected into the cavity. As soon as the two outer parts of the mould start to fill with melt the middle nozzle is shut and the outer nozzles are opened. In this way joining seams can be placed in a predetermined position or avoided completely. The process provides big advantages as far as the flow distance is concerned, allowing for very large pieces to be filled with very short flowing distances.