H - Electricity – 01 – M
Patent
H - Electricity
01
M
319/106, 18/687
H01M 2/02 (2006.01) B29C 45/26 (2006.01)
Patent
CA 1045681
Abstract of the Disclosure A battery container made of molded plastic and preferably formed in a single unitary structure. The continer comprises a generally rectangular hollow continer with a closed bottom and an open top. A plurality of internal partitions formed as integral parts of the container bottom and side walls divide the interior space into a plurality of battery cells. These partitions are formed by a plurality of space mold cores disposed within the mold that forms the outside shell of the con- tainer. A plurality of ribs are formed on the mold surface that forms the bottom of the container, the ribs being in alignment with the cavities between adjacent mold cores and forming a plu- rality of parallel grooves in the lower surface of the container bottom. The ribs are at least as wide as the width of the cavi- ties between adjacent cores at the top of the container so that the upper ends of the partitions formed in said cavities fit into the resulting grooves formed by the ribs when the containers are stacked on top of each other, thereby preventing distortion and warping of the partitions while they are stacked. The ribs also affect the flow of plastic through the mold, preventing lateral displacement of the mold cores so that the resulting partitions are produced with a uniform thickness, providing a more reliable battery container and a lower reject rate. The mold gates are formed in the centers of the ribs, and the feed nozzles extend all the way through the ribs to avoid any reduction in the groove depth due to buildup of plastic at the gates. To maintain a sub- stantially uniform thickness in the bottom of the container in the gate regions, the corners of the mold cores are provided with recesses adjacent the gate regions, thereby increasing the thick- ness of the lower ends of the partitions in those regions.
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