DEEP-DRAW THERMOFORMING OF THERMOPLASTIC SHEET

    公开(公告)号:CA1099883A

    公开(公告)日:1981-04-28

    申请号:CA285001

    申请日:1977-08-18

    Abstract: 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 thermoplastic sheet to position between the mandrel and mold cavity with means for moving the mandrel through the heated thermoplastic 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.

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