B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 70/44 (2006.01) B29C 51/08 (2006.01) B29C 51/26 (2006.01) B29C 51/28 (2006.01) B29C 70/56 (2006.01) B29C 35/02 (2006.01) B29C 51/04 (2006.01) B29C 51/42 (2006.01) B29C 51/44 (2006.01)
Patent
CA 2473692
A method and apparatus for molding thermoformable sheet material is set forth. The method includes the steps of providing a conventional stamp type mold, one section of which provides a compliant mold member which is augmented by diaphragm. The diaphragm coacts with the compliant member during a molding phase to ensure dimensional uniformity in the molded article. Further, tight or detailed areas are easily molded by making use of the compliant and diaphragm members. In a further embodiment, tension adjusting is achieved during molding by a series of discrete tension members. The tension members cooperate with the compliant and diaphragm members to significantly improve dimensional uniformity and prevent wrinkling in the molded article.
L'invention concerne un procédé et un appareil destinés à mouler une feuille de matériau thermoformable. Ce procédé comprend les étapes consistant à fournir un moule de type tampon conventionnel, une section duquel fournit un élément de moule adaptatif augmenté par un diaphragme. Ce diaphragme agit de concert avec l'élément adaptatif durant la phase de moulage afin d'assurer l'uniformité dimensionnelle de l'article moulé. En outre, des zones serrées ou détaillées sont aisément moulées au moyen des éléments de diaphragme et adaptatif. Dans un autre mode de réalisation, le réglage de tension est effectué durant le moulage par une série d'éléments de tension discrets. Ces éléments de tension coopèrent avec les éléments de diaphragme et adaptatif en vue d'améliorer de manière significative l'uniformité dimensionnelle et de prévenir le plissement dans l'article moulé.
Gagnon Patrick
Lebrun Gilbert
Youssef Younes
National Research Council Of Canada
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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