Intensification through displacement of a coacting mold member
AssigneeWater Gremlin Company
InventorRobert W. Ratte
Life of this patent
Estimating the term…
Abstract
An apparatus and method for pressure casting a battery part wherein at least one of the mold members forming the surfaces of an internal battery part cavity are displaced with respect to one another to reduce the volume of the mold cavity formed between the two parts to thereby intensify the pressure sufficiently high pressure so as to inhibit the formation of cracks and tears in a cast part.
Claims14
A system for pressure casting of a battery part to inhibit the formation of cracks and tears in the pressure casting of battery parts comprising:
- a mold member, said mold member carrying a portion of an internal mold cavity surface therein;
- a displaceable mold member, said displaceable mold member carrying a further portion of an internal mold cavity thereon with said displaceable mold member coacting with said mold member to form an internal battery part cavity of a first volume;
- and
- a power source for displacing said displaceable mold member into said mold member to form the battery part cavity of a first volume into a battery part cavity of a second volume, said second volume less than said first volume to thereby intensify the pressure of a battery part in the battery part cavity to thereby to thereby produce a pressure cast battery part substantially free of cracks and tears.
The method of pressure casting a lead battery terminal to inhibit the formation of cracks and tears in the battery terminal comprising the steps of:
- forming a battery terminal cavity of a first volume between a mold member and a displaceable core member;
- injecting molten lead under pressure into the battery terminal cavity;
- and
- reducing the first volume of the battery terminal cavity by displacing the displaceable core member with respect to the mold member to thereby reduce the first volume to a second volume lesser than said first volume but sufficient to inhibit the formation of cracks and tears in the battery terminal.
A method for pressure casting and partial cold forming a battery part free of cracks and tears comprising:
- forming an integral battery part cavity of a first volume through coaction of a fixed mold member and a displaceable mold member;
- injecting lead under pressure into the battery part cavity formed by the fixed mold member and the displaceable mold member;
- driving the displaceable mold member with sufficient force so as to reduce the first volume of the battery part cavity to a second volume lesser than said first volume to thereby inhibit any cracks or tears from a solidified battery part formed therein.
The method of forming a pressure cast battery part free of cracks and voids comprising the steps of:
- introducing a molten lead under pressure to a battery part cavity formed by at least two mold members at least one of which is displaceable with respect to the other;
- sealing off the battery part cavity while the battery part cavity contains molten lead to thereby form a closed volume for the molten lead;
- and
- increasing the pressure of the molten lead in the battery part cavity by displacing at least one of the at least two mold members to thereby internally reduce the volume of the mold cavity and thereby create sufficiently high pressure so that when the molten lead solidifies it forms a battery part free of cracks and voids.
Dependencies are inferred from the claim text.