Hot runner manifold system

Details Hot runner manifold system Hot runner manifold system

2007-10-30

2007-10-30

Heitbrink, Tim (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With means between charger and mold to cut off flow of...

C425S566000, C425S572000

Reexamination Certificate

active

10542737

ABSTRACT:
A manifold system (50) comprising a main manifold (56) with a plurality of arms (64), a plurality of sub-manifolds (52) spaced from the main manifold (56) and communicating with the main manifold (56) through a plurality of melt transfer bushings (68) disposed between the main manifold (56) and the sub-manifolds (52). The melt transfer bushings (68) may include static mixers (140) to homogenize the melt. An air plate (70) is disposed between a backing plate (58) preferably housing the main manifold (56) and a manifold plate (54) preferably housing the sub-manifolds (52). The air plate (70) has a plurality of air channels (74) that communicate with valve gate nozzle actuators (90), which are received in actuator cavities (72) in the air plate (70). The air plate (70) is bolted to the manifold plate (54), and the backing plate (58) is bolted to the air plate (70) with bolting patterns not constrained by location of the main manifold (56) or sub-manifolds (52). The manifold system (50), as shown in FIG.5,has better thermal and geometric balance, closer nozzle spacing, and better bolting for less plate bowing.

REFERENCES:
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International Search Report for PCT/CA03/00143 (priority document in the instant case), Mailing date of Jun. 11, 2003.
International Preliminary Examination Report for PCT/CA03/00143 (priority document in the instance case), Mailing date of Mar. 12, 2004.

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