Process of molding thermoplastic sheet

B - Operations – Transporting – 29 – C

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B29C 59/06 (2006.01) B29C 51/18 (2006.01) B29C 51/22 (2006.01) B29C 51/30 (2006.01) B29C 51/06 (2006.01) B29C 51/08 (2006.01)

Patent

CA 2017794

This process of molding a thermoplastic sheet can be used for blister packaging. The process particularly includes the premolding step of ; bringing the sheet into close contact with the outer cylin- drical surface of a molding drum, preheating the sheet and concurrently vacuum sucking the sheet into a cavity defined on the outer cylindrical surface of the drum; and the full-mold- ing step of vacuum sucking the sheet and concurrently insert- ing the sheet into the cavity by means of a plug. The process can well mold a thermoplastic sheet includ- ing a layer of polypropylene.

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