Injection molding apparatus
OwnerJerome L. Wilsoninventor
Life of this patent
Estimating the term…
Abstract
An injection molding machine that includes a base assembly having separable mold halves in which at least one removable liner is contained between the opposed surfaces of the mold halves. The liner has a molding cavity formed therein. When the assembly is closed, the liner is clamped between the mold halves and molten material is delivered into the cavity through the existing sprue system to fill the cavity. Opening the mold permits the liner to be removed and the part is separated therefrom from the liner.
Claims13
In an injection mold having a stationary member and a movable member that are arranged to move between an open and a closed position and sprue means for feeding molten material between said members, the improvement comprising at least one flat plate having parallelly disposed top and bottom surfaces, said plate being insertable between the mold members when said members are in an open position, said plate having a contoured part defining hole passing through its top and bottom surfaces for receiving molten material therein said hole outlines a part to be molded, supporting means attached to one of the mold members for removably suspending the plate between the mold members and permitting the members to close against said plate to close both sides of the part defining hole whereby molten metal can be fed into said part defining hole to form said part.
In an injection mold having opposing members that are movable between an open and closed position and a modular unit mounted between said members that has opposed top and bottom plates that open and close with said mold members and a sprue means for bringing molten material between the plates, the improvement comprising an open sided chamber formed between the opposing plates of the modular unit, a removable flat molding block that is insertable into the chamber between the plates when the mold is open and being clamped between the plates when the mold is closed, a contoured part defining hole formed in the block that passes through the top and bottom surfaces of said block and communicates with said sprue means , said hole outlines a part to be molded, whereby the part defining hole, is closed against said plates when the mold is closed and is fed with said molten material to form said part.
Dependencies are inferred from the claim text.