| 摘要 |
A method of injection molding an article comprising the steps of: (a) providing an injection mould 2 comprising a plurality of mould parts defining a mould cavity 10, including first and second movable mould parts 4, 6; an injection inlet 12 is located in the vicinity of the first movable mould part; (b) disposing the movable mould parts in a first configuration so as to define a first intermediate moulding cavity, in which the first movable mould part is in a first rearward position and the second movable mould part is in a first forward position; (e.) injecting a volume of molten thermoplastic resin material into the first intermediate moulding cavity through the injection inlet to fill the first intermediate moulding cavity with the molten material; (d) closing the injection inlet; (e) moving the first and second movable mould parts to a final configuration so as to define a final moulding cavity, the final moulding cavity defining a cavity outer surface which defines the outer shape of the article to be moulded and the final moulding cavity having substantially the same volume as the first intermediate moulding cavity. Preferably, in the final configuration the first mould part is forward of the first rearward position and the second mould part is rearward of the first forward position. The method is particularly suitable for moulding containers having thin sections or a high L/T ratio (flow length/wall thickness). |
