| 摘要 |
<p>1319837 Rotary vacuum moulds COMPAGNIA ITALIANA NEST-PACK SpA 24 Aug 1970 [25 Aug 1969] 40595/70 Heading B5A A moulding machine comprises a driven drum 1 with suction moulds 9 connected to a vacuum distributer 8, which receives a web 13 of thermoplastic, e.g. expanded material, from a drum 14 via a pre-heater 17, the formed mouldings 22 being cut from the web by an endless cutting band 48 disposed transversely to the web with its edge facing the direction of movement of the web. The web is moved by endless chains 24 having spikes (124), Figs. 5 and 6, not shown, which ensure that the sides of the webs are sealingly located in grooves (25) of the drum. In the moulding position, each mould 9 co-operates with a reciprocable plunger 26 driven by a fluid cylinder 28. The web with the formed mouldings is conveyed to a supporting conveyer and plate 42 below the cutter 48 and pressed into contact therewith by spring-loaded rollers (71), Fig. 8, not shown. The cutter 48 is adjustably disposed in a plane askew to a plane normal to the direction of movement of the web and its lower flight moves in guides (57), (58), Fig. 11, not shown, whilst its upper flight continuously contacts a sharpener 61. The waste portion 113 of the web passes to a shreading machine (79), Fig. 15, not shown, where it is passed to a heater (81) and then preferably to an extruder (82). The cut mouldings are passed by a shoot 83 to a stacking and packing device (86), (87). The waste web (113) can be moved to a reel (72), by the spiked chain 24, Fig. 13, not shown, or by spiked rollers (77), Fig. 14, not shown. The drum 1 can be fed directly from a foil extruder.</p> |
