| 摘要 |
A method for injection moulding products (2) in an injection moulding machine, the products consisting of product portions (4, 6) of materials of different kinds connected with each other, for example sealing rings consisting of a sealing portion of a thermoplastic elastomer and a retainer portion of plastic. A mould part (18) is arranged in connection with a first mould surface (12) and defines together with this mould surface a cavity for forming the first product portion (4), the cavity being supplied with the material for forming this product portion (4), for example a thermoplastic elastomer. The mould part (18) is separated from the first mould surface (12) when the material of the first product portion has been transferred to a solid state. The mould part (18) is then arranged in connection with a second mould surface (16), wherein the first product portion (4), the second mould surface (16) and the mould part (18) together defines a cavity for forming the second product portion, the cavity for forming the second product portion being supplied with the material for forming the second product portion (6), for example a plastic material. The mould part (18) is separated from the second mould surface (16) when the material of the second product portion has been transferred into solid state, whereupon the product (2) is ejected from the cavity. The mould part (18) is displaced to a position outside the injection moulding machine when it has been separated from the first mould surface (12) and is outside the injection moulding machine moved to a suitable position for being connected with the second mould surface (16). After that the mould part is displaced into the injection moulding machine to the position in which the first product portion (4), the second mould surface (16) and the mould part (18) define the cavity for forming the second product portion (6). The invention relates also to an injection moulding machine for accomplishing the method. <IMAGE> |
