Injection molding apparatus having inter-manifold melt transfer bushings
Номер патента: CA2219260A1
Опубликовано: 23-04-1999
Автор(ы): Denis L. Babin, Jobst Ulrich Gellert
Принадлежит: Mold Masters 2007 Ltd
Опубликовано: 23-04-1999
Автор(ы): Denis L. Babin, Jobst Ulrich Gellert
Принадлежит: Mold Masters 2007 Ltd
Реферат: Injection molding apparatus for multi-layer molding two materials with different injection temperatures having an insulative air space extending between front and rear heated melt distribution manifolds. Heated nozzles extending from the front manifold each have a central melt channel and one or more annular melt channels extending around it. Melt transfer bushings each having a central melt bore extend across the air space to convey melt from the rear manifold to one of the melt channels in each heated nozzle. In one embodiment, each melt transfer bushing has a head portion which provides a spacer between the two- manifolds, and an elongated stem portion which extends through a bore through the front manifold to one of the heated nozzles. An air space around the stem portion provides thermal separation between the melt from the rear manifold and the front manifold which is at a higher temperature.
Injection molding apparatus having inter-manifold melt transfer bushings
Номер патента: CA2219260C. Автор: Jobst Ulrich Gellert,Denis L. Babin. Владелец: Mold Masters 2007 Ltd. Дата публикации: 2006-12-05.