In Figure 2.34 both mould halves are shown. Among other things, the eight fixtures and the four guiding rails are shown here. Clearly visible are also the two  different cavities for the hard and the soft material.

2.3 Sealing Slide Technology 

Moulds with sealing slides are another common type of multi-component injection  mould. The principle of this injection mould is that during the injection of the first material some areas are sealed for one or more materials by slides. After the first material reaches a certain solidity, one or all of the slides move back in the closed  mould, and the corresponding area is free for being filled with other materials. The  sealing slides do not move completely out of the area, but after the retraction remain  a part of the further geometry. The retraction of the slides is usually hydraulic. With this sealing slide technique, a plastic part comes from every cavity of the  injection mould. There is no shifting of the part or rotating of the injection mould.  The materials are injected into the mould one after another. Every time the injection mould opens, as many finished pieces come out of the mould as cavities it has.  A disadvantage can be that through the gradual filling of the injection mould the  cycle is longer. 

2.4 Further Technologies 

As for special designs, there are still further possibilities for multi-component injection moulds, whose explanation would take too long here. There are also injection  moulds which combine a number of different technologies. For further details see the literature referred to at the end of this chapter.