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专利名称：HEATING DEVICE FOR INJECTION MOLD
APPARATUS
发明人：McGREVY, Alan, N.申请号：EP97934123.0申请日：19970711公开号：EP0921929A2公开日：19990616
摘要：This invention provides an improved heating apparatus for controlling thetemperatures of the resin melt that is pressure fed to a molding cavity comprising aheating jacket (30) comprising the concentric tubular elements; a copper sheath (32)having an inside surface (34) and an outer surface (36), a retainer sleeve (40) and coiledheating element (42) sandwiched between the sheath (32) and the retainer sleeve (40).The inside surface of the sheath (32) is formed with at least one circumferential groove(38) which provides an insulating air gap so that a lesser amount of heat is conducted tothe central portion of the heating jacket (30) thereby creating three distinct temperaturezones. The outer surface (23) of the nozzle (22) is provided with a longitudinal groove (46)extending down its outside surface between the sheath (32) and the nozzle housing (22)for the hot runner conduit (24). A thermocouple sensor cable (52) is received in thelongitudinal groove so that the thermocouple sensor (50) is strategically positionedadjacent the gate well section (28) to maintain the temperature of the resin melt enteringthe cavity.
申请人：CACO PACIFIC CORPORATION
地址：813 North Cummings Road, P.O. Box 2369 Covina, CA 91722-0024 US
国籍：US
代理机构：Grünecker, August, Dipl.-Ing.
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