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US 6,726,465 B2Granted
Injection molding machine employing a flow path gear pump and method of use
OwnerRodney J. Groleauinventor
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OwnerRodney J. Groleauinventor
Estimating the term…
A method and apparatus for synchronizing the flows of molten polymer or similar materials in molding systems which utilize manifolds to direct flow into one or more cavities of an injection mold. The apparatus utilizes intermeshing positive displacement, interconnected gearing systems similar to positive displacement gear pumps in hydraulic systems. These positive displacement gear mechanisms are placed in each parallel flow channel such that all flow in each channel passes through a gear mechanism. After a mold cavity is filled, the gear mechanisms can be utilized as melt pumps to continue packing or holding plastic in the mold cavity. By reversing the pump mechanisms, precise decompression of the flow channels to eliminate gate stringing and other adverse effects can be accomplished.
An injection molding machine utilizing a plasticizer, at least one mold for receiving plasticized material from the plasticizer, and at least one flow channel between the plasticizer and the at least one mold, the injection molding machine comprising,
An injection molding machine utilizing a plasticizer, at least one mold for receiving plasticized material from the plasticizer, and at least one flow channel between the plasticizer and the at least one mold, the injection molding machine comprising,
Dependencies are inferred from the claim text.