Gap seal between a nozzle and a mold component in an...

B - Operations – Transporting – 29 – C

Patent

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Details

B29C 45/27 (2006.01)

Patent

CA 2462310

A nozzle for an injection molding apparatus is provided. The nozzle includes a nozzle body, a heater and a first gap seal surface. The nozzle body defines a nozzle body melt passage, that is adapted to be downstream from and in fluid communication with a melt source, and upstream from and in fluid communication with a gate into a mold cavity in a mold component. The heater is thermally connected to the nozzle body for heating melt in the nozzle body melt passage. The first gap seal surface is positioned on a structure that is connected at least indirectly to the nozzle body. The first gap seal surface is adapted to be separated by a gap with respect to a second gap seal surface on the mold component. The gap is sized to inhibit the flow of melt between the first gap seal surface and the second gap seal surface.

L'invention concerne une buse pour un appareil de moulage par injection. Ladite buse comprend un corps de buse, un élément chauffant, et une première surface de joint d'interstice. Le corps de buse présente un passage de matière fondue, qui est conçu pour être en aval d'une source de matière fondue et en communication fluide avec celle-ci, et en amont d'un pont et en communication fluide avec ce dernier à l'intérieur d'une cavité moulée dans un composant moulé. L'élément chauffant est relié thermiquement au corps de buse pour chauffer la matière fondue dans le passage de matière fondue du corps de buse. La première surface de joint d'interstice est positionnée sur une structure qui est reliée au moins indirectement au corps de buse. La première surface de joint d'interstice est conçue pour être séparée par un trou d'une seconde surface de joint d'interstice disposée sur le composant moulé. Le trou est dimensionné afin d'inhiber le flux de matière fondue entre la première surface de joint d'interstice et la seconde surface de joint d'interstice.

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