| 摘要 |
944,674. Laminates and laminating; moulding reinforced synthetic resins. DEUTSCHE TAFELGLAS A.G. DETAG. Dec. 5, 1961 [Dec. 30, 1960], No. 43580/61. Headings B5A and B5N. A web of synthetic resin reinforced with a mat or fabric of glass or textile fibres or strands and having a temporary cover web on each side is fed continuously to a revolving drum having apertures or recesses into which the web is drawn by suction within the drum, the moulded web being partially cured on the drum and removed for final curing. As shown, Fig. 1, a resin-impregnated web 12, fed forward, with cover layers 24 on each side, by rollers 22, 22<SP>1</SP>, is laterally corrugated by being pressed, by a roller 13 having peripheral rollers 14, into recesses 2 formed with apertures 4, in a drum 1. The apertures 4 communicate with a central suction main 5 over a major part of travel of the drum during which the moulded web is partially cured as by infra-red heaters 11. At 15 pressure is applied from a main 6, and the web dislodged thereby is removed by a roller 16 similar to roller 13 and delivered to a curing oven 17. In Fig. 2 a drum with larger sectors has apertures 3 over which the web is clamped by rings 19 to produce cupola-shaped depressions subsequently divided into individual mouldings. The apertures in the drum may be fitted with dies to produce mouldings of other shapes. |
