| 摘要 |
Process where a part made of thermoplastic resin is manufactured. The mould (1) is provided with at least one material inlet (4), at least one fluid channel (10) and at least one moveable mould member (2). The mould (1) is further provided with at least one pressure sensor (5). The injection moulding process is initiated by reducing the volume of the mould cavity, whereby an amount of molten thermoplastic resin is injected. A skin is allowed to form in the resin. The pressurised fluid is introduced into the molten resin, forming a fluid cavity (11). The fluid exerts a pressure towards the walls of the mould cavity (3). This pressure is detected by the pressure sensor (5), which guides the movement of the moveable mould member (2). The volume of the mould cavity (3) increases while the fluid is allowed to flow into the growing fluid cavity (11). The resin is allowed to solidify further while the fluid pressure is maintained. |
