Mold parts Retainer plate

Cavity-retainer plate n. A plate in a mold that holds the cavities and forces. Such plates are at the mold parting line and usually contain the guide pins and bushings. 

Figure 7.10 Schematic of a two-plate mold. A Knockout plate, B ejector retainer plate, C ejector travel, D support plate, E sleeve-type ejector, F rear cavity plate, G cavity, H front cavity plate, I locating ring, J sprue bushing, K damping piate, L parting iine, M core or force, N ejector pin, O sprue puiier, P damping piate, Q retainer piate, R knockout pins, S core or force pin.

Latch plate A plate used for retaining a removable mold core of relatively large diameter, or for holding insert-carrying pins on the upper part of a mold. Release of the pins or core is effected by moving the latch plate. 

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