| 摘要 |
Mould for injection moulding of plastic articles which are automatically numbered or codified without repeated combinations. One half 2 of the mould comprises concentric rings 18-23 which are rotatable around a reference axis orthogonal to the mould surface, said rings 18-23 forming parts of the cavity 4 of the mould at positions arranged at equal distances relative to each other around the reference axis. Each ring 18-23 has towards the interior of each cavity a marking different from the markings for the other cavities, and means are provided for rotating each ring 18-23 in steps such that said markings be guided to the cavity 4 one at a time, and for rotating every other ring one step each time the preceding ring 18-23 completes a revolution, in the same way as in a mechanical counter. Manoeuvring means 50, 53, 56 are provided for actuating the rotating means by one step for each separation cycle and the bringing of the halves 1, 2 towards each other. <IMAGE> |
