摘要:
A temperature gated injection molding system having a melt distribution manifold with removable steel inserts (82) seated in tapered transverse openings. The inserts are cast or machined to various standard configurations having a melt duct extending from an inlet (98) to one or more outlets (100) to provide the melt passage with smoothly curved bends and/or branches. Each insert has a flange portion (88) which seats against a shoulder in the manifold, and a locating pin to align the melt duct with the melt passage (112) in the manifold. In one embodiment, the insert has a retaining screw (126) which is easily removable to clean or replace the insert.
摘要:
The present invention provides a hot runner injection molding apparatus comprising a melt conveying system (M), a mold cavity (16) and a manifold heater (106,50"'). The melt conveying system (M) having a melt distribution manifold (28) with melt passage (12) for transferring melt from a source of pressurised melt to the mold cavity (16) and an injection nozzle (10) with a melt bore (42) in fluid communication with the melt passage (12) and the mold cavity (16) adjacent to the nozzle (10). The manifold heater (106,50"') includes a film heating element (302) adapted to provide heat to the melt distribution manifold (28).
摘要:
The present invention provides a hot runner injection molding apparatus comprising a melt conveying system (M), a mold cavity (16) and a manifold heater (106,50"'). The melt conveying system (M) having a melt distribution manifold (28) with melt passage (12) for transferring melt from a source of pressurised melt to the mold cavity (16) and an injection nozzle (10) with a melt bore (42) in fluid communication with the melt passage (12) and the mold cavity (16) adjacent to the nozzle (10). The manifold heater (106,50"') includes a film heating element (302) adapted to provide heat to the melt distribution manifold (28).
摘要:
A method of making an injection molding melt distribution manifold wherein the melt passage branches through a number of elbows leading to different gates. Each elbow is preformed in a cylindrical plug which fits in a bore in an outer end of the manifold in alignment with a lateral portion of the melt channel. A brazing hole with an upward mouth is drilled in the outer surface of the plug and nickel alloy brazing powder is poured into it. After insertion into the bore in the manifold, the plug is rotated with a suitable tool to a predetermined position with the mouth of the brazing hole pointed downward. The manifold is then heated in a vacuum furnace to integrally braze the plugs in place simultaneously with brazing an electrical heating element in a channel in the manifold. The melt passage is then completed by drilling an outlet bore from the front face of the manifold to the outlet of each elbow.
摘要:
A temperature gated injection molding system having a melt distribution manifold with removable steel inserts (82) seated in tapered transverse openings. The inserts are cast or machined to various standard configurations having a melt duct extending from an inlet (98) to one or more outlets (100) to provide the melt passage with smoothly curved bends and/or branches. Each insert has a flange portion (88) which seats against a shoulder in the manifold, and a locating pin to align the melt duct with the melt passage (112) in the manifold. In one embodiment, the insert has a retaining screw (126) which is easily removable to clean or replace the insert.