Deep-draw thermoforming of thermoplastic sheet

Details Deep-draw thermoforming of thermoplastic sheet Deep-draw thermoforming of thermoplastic sheet

B - Operations, Transporting

29

C

18/1070

B29C 51/32 (2006.01) B29C 51/04 (2006.01) B29C 51/08 (2006.01) B29C 51/10 (2006.01)

Patent

CA 1099883

ABSTRACT OF THE DISCLOSURE An apparatus is disclosed for producing hollow articles of thermoplastic sheet material having large L/D ratios. The apparatus comprises a heated mandrel and a mold cavity with means provided for securing a heated thermo- plastic sheet to position between the mandrel and mold cavity with means for moving the mandrel through the heated thermo- plastic sheet so as to draw the heated thermoplastic onto the walls of the mandrel and into the mold cavity. A domed guide means is provided located directly above and at the top of the mold cavity with the guide means having internal walls which are greater in diameter than the internal diameter of the mold cavity. The domed guide means is also equiped with a hardened metal insert cutter positioned near the entrance of the mold cavity in order to sever the sheet material on closure of the mold.

285001

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