GB1112736A - Mould - Google Patents

Abstract

1,112,736. Moulding plastic material. SOC. D'ETUDE DE TECHNIQUES INDUSTRIELLES ET DE CONSTRUCTION DITE. 15 Sept., 1966 [21 March, 1966], No. 41237/66. Heading B5A. A mould for moulding articles in a plurality of colours or from a plurality of materials includes a fixed female die 1 and a movable male die 2, the space between them corresponding to at least part of the article to be moulded, a part 7 of the die 2 being replaceable by a part 8 which, when placed in the mould, provides no space between it and the die 1. Thus, when the part 8 replaces the part 7, plastic material injected vertically through an orifice 31 fills only a zone 9 of the mould; at the next moulding stage the part 7 replaces part 8 and a material of different colour or kind is injected into the zone 10 through a horizontal injection head 30 having a heater 30 1 . The parts 7 and 8 may be received in a carriage moved horizontally by jacks so that either part can be brought into alignment with a jack 23 whereby the appropriate part can be placed by the vertical piston rod 23 1 of the jack in the mould, wherein it is held by a wedge 6. The carriage is guided by opposed recesses 14 1 in a pair of guide plates 14 depending from the mould. After moulding, the assembly 4 which carries the die 2 is moved to the left, and the article is removed therefrom by a mechanism including plates 5 1 , 5 2 carrying ejector tubes 13 which are moved to the right on rods 12 relative the die 2. The dies may include three mould cavities permitting the simultaneous moulding of three articles. Conduits for heating or cooling fluid are located in the assemblies 3 and 4. Alternatively, the parts 7 and 8 could form part of the male die.