Back to results
US 5,192,555 AGranted
Apparatus for molding plastic articles
AssigneeHusky Injection Molding Systems Ltd.
InventorRobin Arnott
Life of this patent
Estimating the term…
Abstract
Apparatus and method for molding plastic articles including oscillating the molten plastic in the mold cavity. The method and apparatus is particularly suitable for use with a plurality of mold cavities supplied from a single feeding means or extruder. The disclosure teaches alternately feeding molten plastic to the mold cavity from at least one shooting pot while the flow of molten plastic to the mold cavity from the feeding means is discontinued.
Claims9
Apparatus for molding plastic articles which comprises:
- at least one mold cavity;
- at least two nozzles communicating with said mold cavity for feeding molten plastic to said mold cavity;
- a hot runner system communicating with said nozzles for feeding molten plastic to said nozzles;
- feeding means for feeding said molten plastic to said hot runner system;
- valve means in the hot runner system operative to permit flow of said molten plastic to said nozzles from said feeding means and to shut-off the flow of said molten plastic to said nozzles from said feeding means;
- at least one shooting pot communicating with each nozzle and with the hot runner system, said communication being downstream of said valve means;
- and
- means for alternately feeding said molten plastic from said at least one shooting pot to each nozzle, whereby the molten plastic is oscillated in the mold cavity.
5 more elements
Dependencies are inferred from the claim text.