AUTOMATIC HOPPER LOADER

专利名称：AUTOMATIC HOPPER LOADER发明人：FRIMBERGER H,US申请号：US3780446D申请日：19720725公开号：US3780446A公开日：19731225

摘要：An apparatus for automatically supplying plastic material to the closed hopperof an injection molding machine or the like, the hopper being provided with an air dryingarrangement, including a suction blower, for drying the air and thus the plastic material inthe hopper. The plastic material to be supplied to the hopper is maintained in a supplybin which is open at its upper end. A suction wand, including a pair of space concentrictubes which are open at one end, extends into the bin to a point below the level of theplastic material. The other end of the inner one of the pair of concentric tubes isconnected to the interior of the hopper adjacent the upper end thereof for conveyingthe plastic material thereto, while the other end of the outer one of the pair ofconcentric tubes is connected to the outlet air tube of the drying arrangement, andhence the outlet of the suction blower. Finally, a valve arrangement is connected in theoutlet tube from the suction blower. The valve arrangement is such that when it is in anormal first position, the outlet stream of air from the drying device passes into thehopper via the outlet tube of the suction blower, and when it is in a second position theflow path to the hopper via the outlet tube is closed off and the output stream of airfrom the drying device is conducted via the outer tube of the suction wand into thesupply bin where it is drawn together with the plastic material, via the inner tube of the

suction wand into the hopper.

申请人：POLYMER MACHINERY CORP,US

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