[특허]Internally heated sprue bushing with thermally conductive sleeve

[미국특허] Internally heated sprue bushing with thermally conductive sleeve 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B29C-045/72
출원번호	US-0746966 (1991-08-19)
발명자 / 주소	Trakas Panos (1820 Amelia La. Addison IL 60101)
인용정보	피인용 횟수 : 19 인용 특허 : 0

초록 ▼

A sprue bushing which has improved heat transfer characteristics and a method of making the same are described. A cylindrical bushing body having a first, preselected uniform diameter has a cavity formed therein which axially extends within the bushing body for a predetermined length. A bushing inner core which has an outer layer or sleeve of a high heat conductive material is formed in the cavity extending between the two ends of the bushing body. A heating element in the form of a ceramic insulator sleeve is inserted into the bushing body cavity and a particulate refractory material is deposited into the cavity to fill the remainder of the cavity. When filled, the bushing body is swaged down to a second preselected uniform diameter to compact the powdered refractory together with the preformed sleeve to form a solid heating element. A runner passage is then drilled through the inner core.

대표청구항 ▼

An internally heated sprue bushing assembly having an inlet for receiving pressurized melt and an outlet for discharge of the pressurized melt, said sprue bushing assembly comprising: a bushing casing-core element having an integral outer sidewall and an endwall and an elongated inner core, the outer surface of said elongated inner core and the inner surface of said sidewall defining a generally annular compartment within said bushing casing core element; heat conducting means in surrounding relation to said elongated inner core, said heat conducting means axially extending a preselected length within and occupying a portion of said annular compartment; heating means in surrounding relation to said heat conducting means and elongated inner core, said heating means axially extending a preselected length within and occupying a portion of said annular compartment; a compacted unified mass of particulate material occupying the remainder of said annular compartment; and a melt runner passage in said elongated inner core interposed between and in flow communication with said inlet and outlet of said sprue bushing assembly.

이 특허를 인용한 특허 (19) 인용/피인용 타임라인 분석

Trakas, Panos, Adjustable valve pin assembly.
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Trakas,Panos, Adjustable valve pin assembly.
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Crandell Walter R., Bushing and nozzle heating device.
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Crandell, Walter, Electric heater crushable cores and compacted unitary heater device and method of making such devices.
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Günther, Herbert; Kretschmab, Christel; Otschik, Peter, Electric heating element for hot runner systems and a method for producing a heating element of this type.
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Ernich,Juergen, Heating cylinder for attachment to an injection nozzle for an injection molding system.
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McGrevy Alan N., Heating device for an injection mold apparatus.
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Gellert,Jobst U.; Babin,Denis; Fischer,Jonathon, Hot runner nozzle with removable sleeve.
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Nakaya,Masatoshi; Tabata,Shozo, Hot runner sprue.
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Helldin Carl E.,SEX, Insulated sprue bushing.
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Trakas,Panos, Internally heated nozzle for close cavity spacing injection molding applications.
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McGrevy Alan N., Method for applying a differential heating to injection nozzle.
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Sakamoto,Yasuyoshi; Hiki,Katsuyuki, Moving side bush for a disc-molding die.
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Trakas,Panos, Needle assembly with adjustable gating needle position for injection molding nozzle.
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Babin,Denis, Nozzle with thermally conductive device.
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Gordon M. Pendergraft, Vacuum cast ceramic fiber insulated band having heating and cooling elements.
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Trakas, Panos, Valve gate system.
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Trakas, Panos, Valve gate system.
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Moberg Clifford A., Wear-resistant sprue bushing.
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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] Internally heated sprue bushing with thermally conductive sleeve 원문보기