Apparatus for molding an insert member in a frame member

A mold for forming a member defining a frame, said frame surrounding and retaining an insert member, said mold comprising a pair of relatively movable cavity plate assemblies arranged, when positioned together, to define at least one cavity having the configuration of said frame-defining member, one of said cavity plate assemblies defining a channel spaced from said cavity for receiving and supporting a strip of insert-forming material, a plunger, carried by the other of said cavity plate assemblies, and movably positioned on an axis transverse to said channel, and in communication therewith, a punch movable through said one cavity plate assembly in alignment with said plunger, said punch being movable from a position on one side of said channel to a position intersecting said channel and thereafter to a position in abutting relation with said plunger in said cavity, whereby an insert member may be sheared by said punch from said elongated strip of insert-forming material in said channel, and moved into engagement with said plunger in said cavity, said punch and plunger being proportioned to retain and support said insert member with the margin of said insert member protruding laterally beyond the end of said punch and being exposed within the cavity, whereby plasticized material utilized to form said frame-defining member solidifies, upon being forced into said cavity, with at least a portion of the margin of said insert member embedded therein, and an ejector unit having ejector pins slidable in said one cavity plate assembly, said ejector unit being actuable to eject a formed frame-defining member carrying an insert member from said cavity when the cavity plate assemblies are separated.

Apparatus for forming at least one half-section of a cassette casing having a viewing window, comprising a pair of relatively movable cavity plate assemblies arranged when positioned together to define at least one cavity having a configuration of a half-section of a cassette casing, one of said cavity plate assemblies having a channel spaced from said cavity for supporting an elongated strip of transparent material, a backup member adjacent to the side of said one cavity plate assembly remote from the other cavity plate assembly, a plunger carried by said other cavity plate assembly on an axis transversely of said cavity and said channel, a punch movable through said one cavity plate assembly in alignment with said plunger and secured in said backup member, said punch being disposed on one side of the plane of said channel when said one cavity plate assembly is separated from said backup member, said one cavity plate assembly and said backup member being relatively movable together whereupon a window wafer is first sheared by said punch from an elongated strip of transparent material in said channel and then engaged with said plunger, and said punch and said plunger serving to support the wafer with no more than the margins thereof exposed within said cavity whereby plasticized material forced into said cavity solidifies with at least a portion of the margins of the wafer embedded therein.