Static molds – Uniting preform with molding material – Preform supported by hole or recess in mold wall or surface
Patent
1975-08-25
1976-11-23
Flint, Jr., J. Howard
Static molds
Uniting preform with molding material
Preform supported by hole or recess in mold wall or surface
249 95, B29C 600
Patent
active
039932834
ABSTRACT:
Open face molding apparatus for molding a pivotable flow control device. The flow control device has a main body portion of rigid plastic material and a sealing portion of elastomeric material on the outer periphery of the main body portion. The pivot rod of the flow control device has a central portion embedded in the rigid main body portion, with offset end portions, one of which has a crank arm formed thereon. The molding apparatus has a mold body with an open mold cavity having first and second portions for respectively forming portions of the main body portion and elastomeric sealing portion of the flow control device. A rim projects upwardly from opposite sides of the cavity, and a pair of pivot rod supporting grooves are formed in the rim on opposite sides of the cavity for supporting the offset end portions of the pivot rod above the cavity in such a manner that the central portion of the pivot rod is received only in the low portion of the cavity that forms the rigid main body portion of the flow control device. A projection extends outwardly from the mold body, and the projection is formed with a rod receiving recess and crank arm supporting slots for axially and angularly locating the pivot rod by merely placing the pivot rod in position on the rod receiving grooves and crank arm locating slots.
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