Method for producing heat-insulation duct

Method for producing heat-insulation duct

  • CN 1,144,668 C
  • Filed: 07/18/1997
  • Issued: 04/07/2004
  • Est. Priority Date: 07/23/1996
  • Status: Active Grant
First Claim
Patent Images

1. , be used to make a kind of method of heat insulation conduit, in one of them pipe (2) or a plurality of in pipe spacing ground is arranged by plastic pellicle (a 5) parcel that is configured as flexible pipe (6);

  • A kind of foamable plastics be placed in one pipe or a plurality of in manage in the zone between (2) and plastic pellicle or the flexible pipe (6);

    In described one in pipe (2) or two pipe and flexible pipe (6) be admitted to one by movable half module (9a is 9b) in the mould of Gou Chenging (9);

    The outer tube that is made of plastics at last is pressed against on the flexible pipe (6), it is characterized in that, described flexible pipe (6) is attached to closed half module (9a by the plastics of foaming, on the corrugated contours of internal surface 9b), outer tube (13) directly abuts against on the ripply surface of flexible pipe (6) after leaving from the outlet of extrusion die (12).

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×