B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 45/23 (2006.01) B29C 45/27 (2006.01) B29C 45/28 (2006.01)
Patent
CA 2284561
A mold bushing (10) having a one-piece body member (30) with a central passageway (60) for a shut-off gate pin member (50) and a separate and distinct passageway for injecting molten plastic material into a mold cavity (16). A tip member (32) is positioned on the end of the body member and has a material discharge chamber (38). A gate or orifice (56) opened and closed by the pin member is positioned either in the tip member or the mold (12). A wear bushing (34) is positioned in the discharge chamber or the end of the body member and acts to support the end of the pin member and prevent the flow of plastic material into the central passageway. The body member is heated by an annular cast member (42). The wear bushing member can be indexed for proper positioning relative to the body member and the plastic flow passageway.
L'invention porte sur une buse (10) de moulage par injection de plastiques dans la cavité d'un moule et comprenant un corps (30) d'une pièce pourvu d'un passage central (60) logeant un pointeau (50) de fermeture de l'orifice d'injection et un passage séparé et distinct d'acheminement du plastique fondu dans la cavité (16) du moule. Un embout (16) monté à l'extrémité du corps contient une chambre de décharge (38) du matériau. L'orifice d'injection (56) commandé par le pointeau peut se trouver dans l'embout ou dans le moule (12). Une buse d'usure (34), montée dans la chambre de décharge ou à l'extrémité du corps empêche le flux de plastique de pénétrer dans le passage central. Le corps est réchauffé par un élément annulaire (42) moulé. Il est possible d'ajuster la position de la buse d'usure par rapport au corps et au passage d'acheminement du plastique.
Greb Scott R.
Reitan David
Seres Eric J. Jr.
Incoe Corporation
Moffat & Co.
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