[특허]Die-casting method

Die-casting method 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B22D-018/02
출원번호	US-0561128 (1983-12-13)
국제출원번호	PCT/JP79/00032 (1979-02-14)
§371/§102 date	19801014 (979May71)
국제공개번호	WO-8001655 (1980-08-21)
발명자 / 주소	Suzuki Haruo (Nishikasugai JPX) Hashimoto Shigeyoshi (Anjo JPX)
출원인 / 주소	Nippondenso Co., Ltd. (Kariya JPX 03)
인용정보	피인용 횟수 : 23 인용 특허 : 0

초록 ▼

A die-casting apparatus having a runner 31 through which molten metal is injected into a die cavity for die-casting an article, a squeeze passage 17 communicating with the die cavity 30 at a portion other than the portion where the runner 31 is communicated with the die cavity 30, and a squeeze plunger 36 snugly and slidably disposed in the squeeze passage 17 and adapted to commence, before the runner 30 is closed by solidification of metal therein, to forcibly displace the molten metal from the squeeze passage 17 back into the die cavity to effect a squeeze on the molten metal in the die cavity 30. The stroke of the squeeze plunger 36 is greater than one half of the length L of the squeeze passage 17. The cross-sectional area S and the length L of the squeeze passage are given by: S≥0.35L2 Because the molten metal injected through the runner 31 into the die cavity 30 is squeezed from the side of the squeeze passage 17, the invention is advantageously capable of not only greatly decreasing the formation of voids which adversely affect the gas-tightness and mechanical strength of die-cast products, but also assuring a reliable production of voidless die-cast products. Particularly, the invention can conveniently be used to produce parts which are needed to provide a high gas-tightness, parts which have to withstand a high pressure, as well as parts which have to be worked precisely. For example, the invention may be used for the production of housings of compressors and pumps.

대표청구항 ▼

A die-casting method comprising: a first step of relatively moving dies into close contact so as to form therebetween die cavity for casting a product, a runner through which molten metal is injected into said die cavity, and a substantially non-narrowing squeeze passage having a cross-sectional area S and connected at open end directly to said die cavity at a point other than the point of connection between said die cavity and said runner; a second step of injecting, by forwardly moving an injection plunger to effect a predetermined injection pressure, the molten metal from said runner via a gate into said die cavity and said squeeze passage to fill said die cavity and said squeeze passage with the molten metal; a third step of starting a squeezing displacement of the molten metal in said non-narrowing squeeze passage by moving a squeeze plunger through said squeeze passage from a retracted position, wherein the squeeze plunger end which faces the die cavity is spaced a distance L from said end of said squeeze passage, toward said die cavity and at a predetermined squeezing pressure greater than said injection pressure and at a time before said gate is blocked by solidified molten metal, said squeeze plunger being moved a distance greater than one-half of said distance L; a fourth step of continuing the squeezing on said molten metal by said squeeze plunger in said passage at said predetermined squeezing pressure until said cavity is filled voidlessly and, during said continued squeezing, forcing molten metal out of said die cavity through said gate into said runner by the molten metal displaced out of said squeeze passage by said squeeze plunger and until the molten metal is completely solidified at least in said die cavity while retaining said squeeze plunger substantially fully inside said passage to produce a solidified voidless die-cast product; a fifth step of retracting said squeeze plunger to remove said squeezing pressure from said squeeze passage after the molten metal is solidified in said die cavity; a sixth step of relatively moving said dies away from one another for the removal of said die-cast product which has been solidified in said die cavity; and preventing said injection plunger from being moved backward during said third and fourth steps by the effect of said greater pressure applied by said squeeze plunger; wherein said area S and said distance L are related by S≥0.35L2.

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Cain, Tracy L.; Garin, Michael, Battery parts having retaining and sealing features and associated methods of manufacture and use.
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Garin, Michael A.; Gifford, Kurt T., Battery parts having retaining and sealing features and associated methods of manufacture and use.
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Garin, Michael A.; Gifford, Kurt T., Battery parts having retaining and sealing features and associated methods of manufacture and use.
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Garin, Michael, Casting solidification expansion materials.
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Thomas Robert Anthony ; Thomas James B., Die assembly for squeeze casting.
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Mikasa, Tetsuo; Ogawa, Tsutomu; Kubo, Nobuo; Fukuchi, Fumiaki; Iwasaki, Haruyuki, Die cast sub-frame.
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Ratte, Robert W., Multiple casting apparatus and method.
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Ratte, Robert W., Multiple casting apparatus and method.
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Ratte, Robert W., Multiple casting apparatus and method.
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Thomas ; deceased Robert Anthony ; Thomas ; legal representative by Margaretanne ; Thomas James B. ; Hale Roger, Pressurized squeeze casting apparatus and method and low pressure furnace for use therewith.
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Cain, Tracy L., Systems and methods for manufacturing battery parts.
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Cain, Tracy L., Systems and methods for manufacturing battery parts.
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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

내보내기 구분	파일저장 인쇄 메일전송
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Die-casting method 원문보기

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