| 摘要 |
<p>Method for the production of articles comprising a rigid or semi-rigid support portion coated with a flexible decorative covering portion, characterised in that it consists: - in a first step, in fixing the flexible portion (21) in the pre-stretched state to the peripheral border (16) of the hollow cavity (11) of a mould; - in a second step, in deforming the free-remaining zone of the said flexible portion, by extension under the effect of the penetration of a countermould (12) inside the said hollow cavity (11), as far as a distance from the bottom of the latter corresponding to the thickness of the finished article, the edges of the said flexible portion being able to remain immobilised by gripping between the two halves of the mould; - in a third step, in injecting the material of the said rigid portion in the molten state, in accordance with the so-called low-pressure technique, into the space remaining between the two halves of the mould, from above the said flexible portion, so as to press the latter against the wall of the hollow cavity (11), the said injection being carried out sequentially through a series of injection orifices (32) in such a way that the successive fronts of molten material, which progress constantly in the same direction, only meet in the hot state, so as to fill the mould completely without creating, in the article, weld (knit) lines corresponding to pleats or beads and to initiators for mechanical rupture of the article; - in a fourth step, in ejecting cold the article obtained and in cutting off the fabric excess. <IMAGE></p> |
