Accession Number : AD0641974

Title :   USE OF LOW-MELTING METAL ALLOYS FOR CASTING AND TRANSFER MOLDING OF HOLLOW PLASTIC SPHERES,

Corporate Author : FELTMAN RESEARCH LABS PICATINNY ARSENAL DOVER N J

Personal Author(s) : Slota,S. A.

Report Date : NOV 1966

Pagination or Media Count : 12

Abstract : In order to produce a hollow plastic ball with only a small opening at one point, a core ipsert, made from a low melting alloy, was used in both a casting mold and a transfer mold. In the casting process, the plastic was poured into the mold as a liquid and cured at room temperature. In the transfer process, the plastic was forced into the mold cavity under pressure (3000 psi) and cured at 310F. In both cases, the finished ball (with insert inside) was heated in a mineral oil bath at 350F to melt the core. This melted core material was poured out of the plastic ball through the small opening and was reused for casting additional cores. (Author)

Descriptors :   (*PLASTICS, SPHERES), (*CASTING, PLASTICS), (*MOLDINGS, PLASTICS), (*LOW TEMPERATURE ALLOYS, *MOLDINGS), ALUMINUM, EPOXY RESINS, CASTINGS

Subject Categories : Metallurgy and Metallography
      Fabrication Metallurgy
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE