Title:
【発明の名称】厚紙管の製造法及びこの方法を実施するための装置
Document Type and Number:
Japanese Patent JPH0628930
Kind Code:
B2
Abstract:
Process for manufacturing a calibrated cardboard tube having minimal surface roughness and dimensional stability, involving helically winding a plurality of glued strips or plies around a mandrel and then polishing the exterior surface of the rough tube, coating the exterior surface with a thermosetting resin, cutting the tube, drying and compressing the cut pieces transversely together with applying heat, wherein at least the next-to-last ply and the last ply or strips of a dense material are impregnated with a thermosetting resin and, after coating and heat compression of the pieces, a final coating of a thermosetting resin is applied to the last plies before drying the coated surface and buffing or finish polishing to form a smooth surface, and the apparatus for performing the process.
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Inventors:
RANGUIRAA JAN HOORU
Application Number:
JP10417585A
Publication Date:
April 20, 1994
Filing Date:
May 17, 1985
Export Citation:
Assignee:
ROOMU SA
International Classes:
B31C3/00; B31C11/02; B31C11/04; (IPC1-7): B31C3/00; B31C11/04
Attorney, Agent or Firm:
Shigeru Yagita (3 outside)
Next Patent: WORKPIECE TAKE-OUT DEVICE