[특허]Backflow preventer for an injection molding machine

[미국특허] Backflow preventer for an injection molding machine 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B29F-001/03 B29F-003/02
출원번호	US-0459060 (1983-01-19)
우선권정보	DE-3203762 (1982-02-04)
발명자 / 주소	Eichlseder Martin (Tettenweis DEX) Brkle Erwin (Benediktbeuern DEX)
출원인 / 주소	Krauss-Maffei Aktiengesellschaft (Munich DEX 03)
인용정보	피인용 횟수 : 21 인용 특허 : 0

초록 ▼

A backflow preventer at the end of an injection molding worm has a pressure ring which abuts directly upon the worm and serves a shank of the valvehead which also bottoms in a bore upon the worm so that force transmission to the worm is over its entire cross section. The shank is surrounded by a blocking ring which can shift in its axial stroke between a position in which it abuts the head and a position in which it abuts the pressure ring, the axial stroke being adjustable by shims forming the floor against which the shank abuts within the bore of the worm.

대표청구항 ▼

In an injection molding machine in combination: an injection cylinder; a plastifying worm rotatably and axially shiftable in said cylinder to generate a liquid synthetic resin and displaces the same in said cylinder in a direction of a downstream end of said worm; and a backflow preventer mounted on said end of said worm, said backflow preventer comprising: a head converging in said direction and having a shank extending from said head in the opposite direction, said worm having an axial bore, said shank being threaded into said bore and bottomed on a floor thereof, a pressure ring surrounding said shank and abutting said end of said worm around said shank with a surface of said pressure ring turned away from said head, a blocking ring surrounding said shank and axially shiftable between said head and said pressure ring while being guided on an inner wall of said cylinder, said rings having engaging surfaces adapted to abut upon the displacement of said worm to drive synthetic resin material from said cylinder, means forming a passage between said blocking ring and said head and effective upon separation of said surfaces to permit synthetic resin material to flow from said worm to a part of said cylinder ahead of said head, a shim received in said axial bore and defining said floor, said shim bearing upon said worm within said bore, and a thread connection between said pressure ring and said shank.

이 특허를 인용한 특허 (21) 인용/피인용 타임라인 분석

Dinerman Alex (Cincinnati OH), Anti-backflow valve for injection molding machines.
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Sonoda Takefumi (Ube JPX) Hashimoto Kiyoshi (Ube JPX), Apparatus for injecting resin into a mold.
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Tsuno Nobuo (Kasugai JPX), Backflow-preventing valves for injection-molding machines.
상세보기
Klaus M. Barr, Bi-directional check ring for a two-stage injection unit.
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Sicilia, Roberto D., Control system for dynamic feed coinjection process.
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Sicilia,Roberto D., Control system for dynamic feed coinjection process.
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Rog Aleksandr (50 Ardmore Rd. West Hartford CT 06119), Disc screw extruder with free-floating operating member.
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Gatti, Joeo M., Flow through ring valve for plastic extruding systems.
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Kawaguchi Toshiro (Yamaguchi JPX) Sonoda Takefumi (Ube JPX) Hashimoto Kiyoshi (Ube JPX), Injection apparatus.
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Sonoda Takefumi (Ube JPX) Hashimoto Kiyoshi (Ube JPX), Injection apparatus.
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Jeon,Han Soo; Park,Young Jin; Kim,Jin Young; Kim,Dong Sung; Shin,Sung Chul; Han,Kyoung Hun, Injection unit having rotatable device for preventing reverse flow.
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Wildman Paul D. ; Trott Delano B., Polymer filteration apparatus and method of use.
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Wildman Paul D., Polymer filtration method and apparatus.
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Ellis, Earle L.; Krohn, Roy N.; Kesselman, David A., Reservoir reducing screw tip.
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Marumoto, Hirotsugu; Kamiya, Munekatsu, Screw and injection apparatus.
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McCullough, Kevin A., Screw design and method for metal injection molding.
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Grimm Robert,DEX ; Nikolaus Stefan,DEX, Screw tip for closing a temperature-control bore of an extruder screw.
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Pena Juan R. (Arquimedes ; s/n Badalona ; Barcelona ESX), Seal for piston screws in plastics injection and extrusion apparatus.
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Dray Robert F., Sliding ring non-return valve.
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Robert F. Dray, Sliding ring non-return valve.
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Heathe William R. (Mississauga CAX) Roetzel Hartmut (Rameldange DEX), Valve assembly for injection molding machine.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Backflow preventer for an injection molding machine 원문보기