PRODUCTION OF SEALING MATERIAL FOR BATTERY

摘要

PURPOSE:To attain secure operation, by providing a resin-pouring gate of a metal mold a thin layer of a sealing material to feed molten resin therefrom and adjusting the volume ratio of the resin-sump to the thin layer. CONSTITUTION:Sealing body 6 made of thermoplastic resin, which is applicable for injection molding is provided with a thin layer 8 of about 0.2mm. thickness in its periphery, and equipped with a resin-sump 9 at the resin-pouring gate. The ratio of the volume of the resin-sump 9 (V1) to the volume of the thin layer 8 (V2) is adjusted to 1.3-9.5. It is desirable to set the thickness of the thin layer 8 to 0.08- 0.2mm..