| 摘要 |
1,158,569. Casting-machines. E. I. VALYI. 23 Sept., 1966 [6 Oct., 1965], No. 42646/66. Heading B3F. [Also in Division B5] In an injection moulding or die-casting machine a first mould part 10 is advanced to and locked in a position in which the mould is substantially closed, and a second mould part 11 is then actuated to completely close the mould under pressure. In one example the mould part 10 is mounted on a platen 12 moved by a piston 21 and cylinder 22 mounted on a fixed plate 15. Locking of mould part 10 is effected by jaws 32-35 engageable in recesses 30, 31 in stop collars 25, 26 adjustably threaded on rods 23, 24 secured to the platen 12. The jaws 32-36 are operated by a cylinder 40 and piston-rod 41, the jaws 33 and 35 being moved by rack and pinion mechanism (45, 46, 50, 51), Fig. 3 (not shown). The mould part 11 is mounted on a platen 13 actuated by piston-rods (60), Fig. 1 (not shown) and large fluid pressure cylinders 61 carried by a plate 16. In a modification (Fig. 5, not shown), the platen 13 carries a piston (80) which slides in a cylinder (81) formed directly and centrally in the plate 16. The platen 12 may be cushioned at each end of its stroke by means of a flanged sleeve (70), Fig. 4 (not shown) surrounding each rod 23, 24 and slidable in a cylinder 72 formed in the plate 15. Alternatively the mould part 11 may be initially advanced beyond the mould closed position to engage and cushion the movement of the mould part 10. In a further embodiment (Fig. 8), the platen 12 carrying mould part 10 is actuated by toggle linkage 85, 86, the links 85 being keyed to a rod 89 connected to a reversible rotor of a fluid motor 90. Projections (91), 92 stop the toggles in the over-dead-centre position.
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