Method and apparatus for making a one piece battery jar
AssigneeHardigg Industries, Inc.
InventorsJames S. Hardigg, George R. Havrilla
Life of this patent
Estimating the term…
Abstract
A single piece battery jaw and method and apparatus for producing the same employs a stack molding type machine with material injection from the platens. The apparatus can effectively injection mold a one-piece jar with a straight side wall or an undercut side wall. Zero draft capability is also provided. The apparatus also includes an extraction device and core stabilizers.
Claims17
In a method for injection molding a hollow molded product in a mold including an elongated central core having a longitudinal axis, a stationary platen and a moving platen, each platen having a mold cavity block associated therewith and matable with each other around said elongated central core, said method comprising mating the mold cavity blocks with each other around said elongated central core to form a mold cavity and injecting a material into said mold cavity to form said hollow molded product, the improvement comprising injecting said material into said mold cavity from both said stationary platen and said moving platen from at least one point from each of said platens in a direction approximately orthogonal to said longitudinal axis.
A method for injection molding a hollow molded product in a mold having a central core, a stationary platen and a moving platen, said method comprising:
- closing said stationary and moving platen around said central core to form a mold cavity;
- injecting a material into said mold cavity to form said hollow molded product;
- stabilizing said central core by extending stabilizers from said stationary and said moving platens into contact with said core, said stabilizers including a shaft portion and a face portion wherein said face portion selectively contacts said central core and has a larger cross-sectional area than said shaft portion.
A method for making a single-piece battery jar comprising:
- clamping a core between a plurality of cavity blocks, whereby a space is defined between said core and said cavity blocks;
- injecting a material into said space;
- opening said cavity blocks;
- and
- removing a jar created from said material by reaching a plurality of arms between said cavity blocks and engaging corner portions of said jar, injecting air into said jar and urging said jar off said core.
Dependencies are inferred from the claim text.