Mold gate diaphragm

Diaphragm gate Gate employed in molding tubular or annular products. 

Diaphragms or ring gates can be used for molding parts where concentricity is important such as cylindrical parts or parts where weld lines can not be tolerated. Pinpoint gates should not be used unless parts (small) are injected rapidly. Tunnel gating can also be used in such cases. Gate location should be at one of the points listed in Table 6.26. 

The fihngate (Figure 4-4) functions to the same principle as the diaphragm gate. It is used with flat moldings and assists cavity filling. (Leaves neither weld-lines nor other markings on the article s surface). 

Diaphragm gate dl-o- fram (web gate) n. In an injection or transfer mold, a gate that forms a complete thin web across the opening of the part, used in the molding of annular and tubular objects. 

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