Transfer molding screw

FIGURE 2.5 Drawing of a screw-transfer molding machine. (After Frados, J. ed. 1976. Plastics Engineering Handbook, 4th Ed., Van Nostrand Reinhold, New York.)... 

Refer to the following subject entries for additional information Screw Configurations, Screw Transfer Molding, Preplasticating Equipment, Injection Molding, and Sheet Extrusion,... 

Figure 1. Direct screw transfer molding machine.

In this proeess, the plastic is heated and melted in a screw and then dropped into a pot of an inverted plunger mold (Fig. 10.15). The molten polymer is transferred to the mold by the same procedure as shown in Fig. 10.12. The screw transfer method and the sequence of the operational steps are depicted in Figs. 10.15(a) and 10.15(b). Screw transfer molding is an excellent process for full automation. 

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