US 4,377,197 A · Apparatus and method for casting lead into plastic for side terminal batteries

Abstract

Apparatus and method for injecting molten lead from a reservoir into a die mold cavity formed about an aperture in the wall of a plastic battery for casting lead-alloy battery terminal connectors. Batteries are positioned adjacent the molten lead reservoir of the apparatus and mold portions move together to hold the battery containers in a clamp-like action. Molten lead is die cast under pressure into the mold cavity in which a stainless steel threaded nut is positioned. The lead is forced through a heated chamber into a portion of the mold which may be water cooled. The mold is designed to allow venting of gases, thereby eliminating porosity; and the apparatus is designed to provide casting which is free of jagged projections in the sprue hole.

Claims13

Dependent claims

An apparatus for casting a lead-alloy battery terminal connector through an aperture in a wall of a plastic battery case, comprising:

(a) a plurality of mold means positioned to surround said aperture on either side of said wall to form a die mold and to define a mold cavity;
(b) insert positioning means operatively associated with one of said mold means and positioned for location within said mold cavity, and capable of slidingly engaging a threaded insert used in forming portions of said connector;
(c) means for injecting molten lead under pressure into said mold cavity through an opening in one of said mold means;
and
(d) means for venting gases from said mold cavity to the atmosphere through a plurality of openings provided in one of said mold means and disposed along the interface of said mold means with said wall.

2 more elements

Dependencies are inferred from the claim text.

Apparatus and method for casting lead into plastic for side terminal batteries

Life of this patent

Apparatus and method for casting lead into plastic for side terminal batteries

Life of this patent

Abstract

Claims13