Three dimensional variable forming apparatus and methods of...

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 67/00 (2006.01) B29C 33/38 (2006.01)

Patent

CA 2719737

The disclosed systems and methods include a mold assembly having a malleable mold (4), a moldable blank (2) and a bladder (1) positioned about the moldable blank (2) to transmit an external force applied to the mold assembly uniformly to the moldable blank (2) and hence to the malleable mold (4). The invention further includes a method of replicating a surface by use of the mold assembly. The method may include manipulating the malleable mold (4) to record the image to be replicated. This manipulation may include a physical engagement of the mold with a physical surface to be replicated. Alternatively, an image, e.g., photograph or laser scan of the surface may be transmitted to a computer numerically controlled ("CNC") system. The CNC system then manipulates the malleable mold (4) to reflect the surface to be replicated. An activated moldable blank, e.g., a blank (2) fabricated from a thermo-forming material, is then positioned over the malleable mold. The bladder (1) is then secured about the moldable blank (2). An external force, such as that induced by placing the mold assembly in a vacuum chamber, is then applied to the mold assembly.

L'invention concerne des systèmes et des procédés comprenant un ensemble moule muni dun moule malléable (4), dun brut moulable (2) et dune poche (1) positionnée autour du brut moulable (2) afin de transmettre uniformément au brut moulable (2), et donc au moule malléable (4), une force extérieure appliquée à lensemble moule. Linvention comprend en outre un procédé de reproduction dune surface au moyen de lensemble moule. Le procédé peut comporter les étapes consistant à manipuler le moule malléable (4) de façon à enregistrer limage à reproduire. Cette manipulation peut comprendre une interaction physique du moule avec une surface physique à reproduire. En variante, une image, par ex. une photographie ou une exploration au laser de la surface, peut être transmise à un système à commande numérique par calculateur ("CNC"). Le système CNC manipule alors le moule malléable (4) de façon à refléter la surface à reproduire. Un brut moulable activé, par ex. un brut (2) façonné à partir dun matériau de thermoformage, est alors positionné par-dessus le moule malléable. La poche (1) est alors fixée autour du brut moulable (2). Une force extérieure, comme celle engendrée en plaçant lensemble moule dans une chambre sous vide, est ensuite appliquée à lensemble moule.

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