CPC B29C 49/02 (2013.01) [B29B 11/12 (2013.01); B29C 43/34 (2013.01); B29C 43/36 (2013.01); B29C 49/08 (2013.01); B29C 49/22 (2013.01); B29C 49/0685 (2022.05); B29C 2043/3411 (2013.01); B29C 2043/3488 (2013.01); B29C 2043/3602 (2013.01); B29C 2949/0771 (2022.05); B29C 2949/306 (2022.05); B29C 2949/3016 (2022.05); B29K 2105/253 (2013.01); B29L 2031/716 (2013.01)] | 19 Claims |
1. A method comprising the following steps:
providing a pre-processed element made of at least one polymeric material,
introducing the pre-processed element in a female mould part having a forming cavity,
shaping the pre-processed element between the female mould part and a male mould part, the female mould part and the male mould part being movable relative to one another along a moulding direction so as to form a concave object from the pre-processed element,
wherein the forming cavity has a transversal dimension measured transversely to the moulding direction, the forming cavity further having a transition zone defined by a funnel-shaped surface in which the transversal dimension progressively decreases from a larger value to a smaller value, the forming cavity further having a bottom,
and wherein, during the introducing step, the pre-processed element is placed in the forming cavity on the transition zone, so that the pre-processed element rests on the funnel-shaped surface at a distance from the bottom of the forming cavity, wherein the pre-processed element is a dose of polymeric material in a molten state, the dose being severed from a plasticizing device.
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