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    COEXTRUSION DEVICE
    1.
    发明专利
    COEXTRUSION DEVICE 未知

    公开(公告)号：CA1159619A

    公开(公告)日：1984-01-03

    申请号：CA384695

    申请日：1981-08-27

    Applicant: STANDARD OIL CO OHIO

    Inventor： KOCH PAUL E ,  BOND THOMAS J ,  ADAMS RICHARD C

    IPC: B29B7/00 ,  B29C47/00 ,  B29C47/04 ,  B29C47/06 ,  B29C47/56 ,  B29C47/70 ,  B29C48/30 ,  B29F3/01

    Abstract: 5426 The coextrusion device of the present invention can be used with conventional extruders and extrusion dies for forming layered products from at least two materials, It includes a manifold for receiving a plurality of extruded feed materials and a feedblock receiving the feed material from the manifold. The feedblock includes first and second faces entrance ports in the first face corresponding to the number of feed materials, channel means passing through the feedblock between the first and second faces directing each feed material into at least one separate profile, and exit ports in the second face corresponding to the number of channel means, defining a first profile for each feed material. An adaptor is provided for receiving the first profiles from the feedblock and includes first and second faces an entrance port in the first face receiving said first profiles, an exit port in the second face corresponding to the entrance of the extrusion die and, a transition zone between the entrance and exit ports wherein the first profiles become contiguous and the overall configuration of the contiguous first profiles is adapted for receipt by the extrusion die. The device can further include a reverser plate and alternate feedblocks having different exit ports. Lastly, a method is provided for reducing perturbation while coextruding, utilizing a device of the present invention.

    DEEP-DRAW THERMOFORMING OF THERMOPLASTIC SHEET
    3.
    发明专利
    DEEP-DRAW THERMOFORMING OF THERMOPLASTIC SHEET 未知

    公开(公告)号：CA1099883A

    公开(公告)日：1981-04-28

    申请号：CA285001

    申请日：1977-08-18

    Applicant: STANDARD OIL CO OHIO

    Inventor： JUDZIS ARNIS ,  BOND THOMAS J

    IPC: B29C51/04 ,  B29C51/08 ,  B29C51/10 ,  B29C51/32 ,  B29C17/03

    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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