Method for the production of molded parts and device for...

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 37/00 (2006.01) B29C 33/00 (2006.01) B29C 44/10 (2006.01)

Patent

CA 2394388

The invention relates to a method for the production of molded parts having a front face and a back face made of a hardenable reaction material, whereby a casting mold consisting of several mold parts (12, 14) is formed, said casting mold having a configuration that remains substantially unchanged during a molding and hardening step and forming a cavity (30) into which the reaction material is filled and hardened, whereupon the casting mold is opened and the molded part is removed from the casting mold. At least one casting mold part (14) has a deformable surface (28) and the cavity (30) of the casting mold is filled with a predetermined amount of hardenable reaction material from a reservoir. The reaction material is hardened while the volume of the cavity of the casting mold is reduced by deformation of the deformable surface (28) of the casting mold. The invention is characterized in that a deformable casting mold surface is used, which is formed by a metal layer and in that the metal layer is kept in contact with the reaction material during deformation of the deformable casting mold surface (28). The invention also relates to a corresponding device for implementing the method disclosed in the invention.

L'invention concerne un procédé de production de pièces moulées présentant une face visible et une face arrière et composées d'une masse de réaction durcissable, un moule en plusieurs parties étant assemblé dans une configuration sensiblement constante pendant une opération de moulage et une opération de durcissement et forme une cavité qui est remplie de la masse de réaction laquelle durcit. Ensuite, le moule est ouvert et la pièce moulée est retirée du moule. Au moins une pièce moulée présente une surface déformable. La cavité du moule est remplie d'une quantité donnée de masse de réaction durcissable provenant d'un réservoir. La masse de réaction durcit tandis qu'une déformation de la surface du moule déformable réduit le volume de la cavité du moule. L'invention est caractérisée en ce que l'on utilise une surface de moule déformable qui est constituée d'une couche métallique et en ce que, lors de la déformation de la surface déformable du moule, la couche métallique est maintenue en contact avec la masse de réaction. L'invention concerne également un dispositif associé permettant la mise en oeuvre du procédé.

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