Distributed bearing injection moulding device

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 45/27 (2006.01) B29C 45/73 (2006.01)

Patent

CA 2583261

The invention relates to a device for injecting thermoplastic material in a liquid state into a mould cavity. A distributor (27) of thermoplastic material in a liquid state, supplying at least one injection nozzle (17), is arranged between a matrix (1), defining at least one mould cavity (4) into which at least one nozzle (17) flows, and a spring release (36), respectively with the aid of a front plate (50) and, preferably, a rear plate (51), of a flat-resting thermally insulating material, in a manner that is as continuous as possible, on a surface (that is as large as possible) of a front surface (26) of the distributor (27) and a rear surface (29) of the matrix (1), preferably on a surface (that is as large as possible) of the rear surface (34) of the distributor (27) and the front surface (37) of the spring release (36) respectively. The matrix (1) is stiffened counter to bending as a result of the stress applied by the injected thermoplastic material and it is possible to reduce the thickness thereof in addition to the length of each nozzle (17).

La présente invention concerne un dispositif d'injection d'une matière thermoplastique à l'état liquide dans une empreinte de moulage. Un distributeur (27) de matière thermoplastique à l'état liquide, alimentant au moins un exemplaire d'une buse d'injection (17), est interposé entre une matrice (1), délimitant au moins un exemplaire d'une empreinte (4) dans laquelle débouche au moins un exemplaire d'une buse (17), et un sommier (36) par l'intermédiaire d'une plaque avant (50) et, de préférence, d'une plaque arrière (51), respectivement, d'un matériau thermiquement isolant en appui à plat, de façon aussi continue que possible, sur une surface aussi grande que possible d'une face avant (26) du distributeur (27) et d'une face arrière (29) de la matrice (1), et, de préférence, sur une surface aussi grande que possible de la face arrière (34) du distributeur (27) et de la face avant (37) du sommier (36), respectivement. La matrice (1) s'en trouve rigidifiée à l'encontre d'un fléchissement sous l'effet des efforts qui lui sont appliqués par la matière thermoplastique injectée, et l'on peut réduire son épaisseur de même que la longueur de chaque exemplaire de buse (17).

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