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US 5,744,173 AGranted
Mold inserts for injection moldings
AssigneeAeroquip Corporation
InventorRobert A. Sterett
Life of this patent
Estimating the term…
Abstract
The present relates to an apparatus for molding plastic parts which includes a cavity insert and a core insert wherein each insert has an open area on the shell or back side thereof. A device for circulating fluid through each chamber cools the inserts. In one preferred embodiment, the cavity and core inserts are made using a mold having a ceramic formulation including generally uniform size aggregate materials and carbon fibers. In certain embodiments, the apparatus further includes pressure bearing devices for absorbing molding pressure during operation of the molding apparatus.
Claims17
A molding apparatus (90) comprising
- a core insert (40) removably attached to a first, core mounting plate (110), the core insert (40) having a back side (130) and a front side (140), the back side (130) defining a chamber (134) for receiving a cooling fluid, the back side (130) having at least one support means (136) axially extending in a direction away from the front side (140), and
- a cavity insert (50, 250) removably attached to a second, cavity mounting plate (200), the cavity insert (50, 250) having a back side (170, 260) and a front side (160, 252), the back side (170, 260) of the cavity insert (50, 250) defining a chamber (164, 264) for receiving a cooling fluid, the back side (170, 260) of the cavity insert having at least one support means (166, 270) axially extending in a direction away from the front side (160, 252) of the cavity insert (50, 250), the front side (140) of the core insert (40) and the front side (160, 252) of the cavity insert (50, 250) defining a cavity (154) for molding an article;
- at least one means (149) for circulating a fluid through the chambers (134 and 154) of the core insert (40) and cavity insert (50, 250);
- and,
- at least one pressure bearing means (220) adjacent the core (40) and cavity (50, 250) inserts, the pressure bearing means (220) having height that is longer than the combined height of the core insert (40) and the cavity insert (50), the pressure bearing means (220) substantially absorbing the molding pressure when the core insert (40) and cavity insert (50, 250) are brought into facing engagement under molding pressure during operation of the molding apparatus (90), the pressure bearing means substantially transfers the molding pressure from the core insert (40) and the cavity insert (50, 250) to the core mounting plate (110) and the cavity mounting plate (200), respectively, during operation of the molding apparatus (90).
2 more elements
Dependencies are inferred from the claim text.