Verfahren zur Herstellung von Hohlkörpern aus mit härtbarem Kunstharz getränktem Fasermaterial

摘要

936,553. Non metallic tubes. DEUTSCHE TAFELGLAS A.G. (DETAG). Nov. 17, 1961 [Nov. 25, 1960], No. 41314/61. Class 99(2). [Also in Group V] Fibre reinforced plastic tubes are formed by applying resin impregnated reinforcing material to both sides of a flattened plastics tube, applying an outer plastics layer, sealing the outer layer and subsequently expanding the flattened body thus formed in an appropriately shaped heated mould by internal pressure. The flattened body is shown in Fig. 2, in which 7 is the inner plastics tube, 6,61 are the reinforcing layers and 5, 51 are the outer sealed plastics layers. By varying the shape of the mould and the arrangement of plastics tubes and reinforcing layers tubes of cross-section as in Figs. 4-7 (not shown) and Figs. 11, 13, 15 may be formed.