| 摘要 |
A mould for injection moulding bounds a plurality of cavities (12, 13) each shaped for moulding elbow fittings. At least a portion of a curved tube section forming portion (55) is shaped for forming a back draught relative to a surface portion (62) of the first sleeve (3) and to a surface portion (63) of the second sleeve (4). Slides (70, 71) are mounted to the second mould half (10) which has guides (72, 73) for guiding movement of the slides (70, 71) in directions (74, 75) obliquely to the opening and closing directions (11) of the mould (2). The slides (70, 71) move apart when the mould (2) is opened and move towards each other when the mould (2) is closed. The slides (70, 71) are located and shaped for forming at least the back draught elbow fitting surface portions (61).
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