Nozzle for use in hot runner mold

Details Nozzle for use in hot runner mold Nozzle for use in hot runner mold

B - Operations, Transporting

29

C

B29C 45/27 (2006.01)

Patent

CA 2467592

A nozzle (26) for a hot runner mold (10) having a cavity (29) and a runner (27) formed in a body (24) thereof and communicating with the cavity. The nozzle leads to the runner and has a heating means (36), a heat-insulating groove (37), and a heat transmitting ring (38) provided on an outer peripheral surface (35) thereof. The nozzle has a f low passageway (33) formed therein. The heating means, the groove, and the ring are arranged in order along a direction of flow of resin (51) within the passageway. The groove serves to prevent heat generated by the heating means from being transferred to a distal end portion (43a) of the nozzle. The ring serves to release the heat of the distal end portion to the body. With this arrangement, the resulting molded product (11) can be removed from the mold without causing any stringiness between the runner and the distal end portion.

La présente invention concerne une buse (26) destiné à un moule à canal chaud (10) qui présente une cavité (29) et un canal (27) formé dans un corps (24) de celui-ci et communiquant avec la cavité. La buse mène au canal et présente un élément chauffant (36), une rainure thermo-isolante (37), et un anneau de transmission de chaleur (38) disposé sur sa surface périphérique externe (35). La buse comprend un voie de passage de flux (33). L'élément chauffant, la rainure et l'anneau sont disposés dans l'ordre le long d'une direction de circulation de résine (51) à l'intérieur de la voie de passage. La rainure empêche la chaleur produite par l'élément chauffant d'être transmise à la partie d'extrémité distale (43a) de la buse. L'anneau sert à transmettre la chaleur de la partie d'extrémité distale au corps. Grâce à ce dispositif, le produit moulé résultant (11) peut être extrait du moule sans provoquer la formation de filaments entre la canal et la partie d'extrémité distale.

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