Preparation of hollow molded body

Abstract

Abstract PURPOSE:To increase the strength of weld between a member of a hollow molded body and an insert member by a method wherein a melting medium is provided on the outer surface of the insert member, an insert jig provided with a blowing pipe is inserted into the insert member, and this member is disposed between mold pieces. CONSTITUTION:Two melted parisons 6 are hung down between mold pieces 4a and 4b separated from each other. Next, the mold pieces 4a and 4b are matched to be closed, and an insert jig 7 on which an insert member 9 is put is held, under a pressure from the outer periphery thereof, by the two parisons 6 wrapping them in, whereby the insert member 9 is welded to the main body of a hollow molded body. Then, compressed air is blown through a blowing pipe 71 to mold the parison 6 in the shape of a cavity. After a cooling time passes, the blowing is ended, the mold pieces 4a and 4b are separated from each other to be opened, and the insert member 9 welded monolithically with the hollow molded body 1 is extracted from the insert jig 7.

Inventors

• 👤 Sumio Nagai
• 👤 澄雄 長井
• 👤 Hiroshi Oota
• 👤 博 太田

Bibliographic Details