Compression mould with deformable cavity wall

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 43/36 (2006.01) B29C 31/06 (2006.01) B29C 33/00 (2006.01) B29C 43/52 (2006.01)

Patent

CA 2587146

The mold comprises a matrix (30) and a punch (20) adapted to penetrate into the cavity of the matrix to determine the molding chamber of the mold, the object being formed through the pressure insertion of the punch (20) within the cavity of the ma~trix (30) where a metered body (8) of polymeric material has been previously placed whose mass is metered according to a reference value. According to the invention, the matrix (30) comprises at least one deformable wall (31) whose inner surface de~fines at least part of the surface of the matrix (30), said deformable wall (31) having, at least in part, a relatively thin thickness which permits it to be elastically deformed under the pressure of the polymeric material in the final molding step of the object, thereby absorbing the error of the mass of the metered body (8) with respect to the reference value.

Un moule comprend une matrice (30) et un poinçon (20) conçu pour pénétrer dans la cavité de la matrice afin de déterminer la chambre de moulage du moule, l'objet étant formé par l'insertion de pression du poinçon (20) à l'intérieur de la cavité de la matrice (30) où un corps mesuré (8) de matériau polymère a été préalablement placé, et dont la masse est mesurée en fonction d'une valeur de référence. Selon cette invention, la matrice (30) comprend au moins une paroi déformable (31) dont la surface intérieure définit au moins une partie de la surface de la matrice (30), cette paroi déformable (31) possédant, au moins en partie, une épaisseur relativement fine qui permet à celle-ci d'être déformée élastiquement sous la pression du matériau polymère dans l'étape de moulage final de l'objet, absorbant l'erreur de la masse du corps mesuré (8) par rapport à la valeur de référence.

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