Improved insert for thermoforming

Details Improved insert for thermoforming Improved insert for thermoforming

B - Operations, Transporting

29

C

B29C 51/12 (2006.01) A47K 3/02 (2006.01) A61G 17/00 (2006.01) B29D 22/00 (2006.01)

Patent

CA 2265530

The present invention relates to mold inserts suitable for use with thermoformable sheets made of poly(methyl) methacrylate and other thermoplastic sheet material. The inserts become an integrated part of the thermoformed product, and are characterized by having at least one removable portion or plug. The plug(s) are removed during the thermoforming process, and allow the thermoformed sheet material to shrink without creating undesirable levels of stress in the sheet material. This prevents cracking or other failure of the sheet material.

La présente invention concerne des inserts de moulage appropriés pour une utilisation avec des feuilles thermoformables formées à partir de méthacrylate de poly(méthyle) et d'une autre feuille thermoplastique. Les inserts forment partie intégrante du produit thermoformé et se caractérisent par le fait qu'ils possèdent au moins une partie ou une cheville amovible. On retire les chevilles pendant le procédé de thermoformage, ce qui permet à la feuille thermoformée de rétrécir sans créer de niveaux de contrainte non voulus dans la feuille. Ce procédé permet d'éviter le craquelage ou un autre défaut de la feuille.

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