[특허]Sealing and retaining bushing for injection molding

Sealing and retaining bushing for injection molding 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B29C-045/20
출원번호	US-0920687 (1986-10-20)
우선권정보	CA-0520519 (1986-10-15)
발명자 / 주소	Schmidt Harald H. (Georgetown CAX) Rozema Henry J. (Brampton CAX)
출원인 / 주소	Mold-Masters Limited (Georgetown CAX 03)
인용정보	피인용 횟수 : 19 인용 특허 : 0

초록 ▼

This invention relates to sealing and support bushings which are located between the manifold and the mold back plate to encircle each valve pin in a multi-cavity valve gated injection molding system. Each bushing is bolted through the manifold to a respective heated nozzle with central bores in alignment to receive the valve pin therethrough. The bushing has an outer flanged portion which extends to contact the mold back plate and forms a leakage containment chamber between them. Thus, the bushings retain the manifold in place, seal against substantial melt leakage around the reciprocating valve pins and collect any melt which does escape to prevent it entering the insulative air space between the hot manifold and the cooled mold back plate. Location of the bushing between the manifold and the mold back plate also enables the use of a standard manifold having longitudinal and transverse bores without requiring diagonal bores.

대표청구항 ▼

In a multi-cavity valve gated injection molding system comprising a manifold extending between a mold back plate and a plurality of spaced heated nozzles seated in a cavity plate, an elongated valve pin having a driven end and a tip end mounted in a central bore in each nozzle to extend through a respective aligned transverse bore through the manifold, the driven end of the valve pin being operatively connected to a hydraulic valve pin actuating mechanism mounted in the mold back plate whereby the valve pin is reciprocated between a retracted open position and a closed position wherein the tip end of the valve pin is seated in a gate extending through the cavity plate to a cavity, and a melt passage branching from a common inlet in the manifold to extend through a longitudinal bore connecting to the transverse bore and around the valve pin through the central bore in each nozzle to the respective gate, the improvement wherein; a sealing and retaining bushing being mounted around each valve pin between the manifold and the mold back plate, each bushing having a central bore which receives the valve pin therethrough whereby substantial leakage of pressurized melt around the reciprocating valve pin is prevented, each bushing being fixed to the manifold by bolts which extend through the manifold and into the heated nozzle to fix the bushing and the heated nozzle to opposite sides of the manifold, each bushing having an outer flanged portion which extends into bearing contact against the mold back plate during operation whereby the manifold is securely retained in position to provide an insulative air space between the manifold and the mold back plate and a containment chamber is formed within the flanged portion to prevent melt which does leak through the central bore past the reciprocating valve pin from entering the surrounding air space.

이 특허를 인용한 특허 (19)

Gellert, Jobst U.; Babin, Denis L., Apparatus and method for multi-layer injection molding.
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Gellert, Jobst U.; Babin, Denis L., Apparatus and method for multi-layer injection molding.
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Jobst U. Gellert CA; Denis L. Babin CA; Itsuto Nakanishi CA, Apparatus and method for multi-layer injection molding.
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Mohammed, Sohail; Macleod, Darrin Albert, Back-up device for use in a melt distribution apparatus of an injection molding system.
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McGrevy Alan N., Heater block with unitized removable heat conductive member.
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Gellert Jobst Ulrich,CAX ; Babin Denis L.,CAX, Injection molding apparatus with insert secured through the manifold to a nozzle.
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Gellert Jobst U. (7A Prince Street Georgetown ; Ontario CAX L7G 2X1), Injection molding system having a valve member with a ribbed insulative portion.
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Gellert Jobst U. (7A Prince Street Georgetown ; Ontario CAX L7G 2X1), Injection molding system having dual feed bushing seated in manifold.
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Tabassi,Payman A., Injection molding valve pin bushing.
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Fairy,Fabrice; Feick,Murray; Tabassi,Payman, Manifold plug for an injection molding apparatus.
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Schmidt, Harald, Nozzle valve gate apparatus with wiper seal.
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Schmidt Harald H. (Georgetown CAX), Pneumatic actuating mechanism for injection molding.
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Eastwood Gregg (Alta Loma CA), Probe assembly for injection molding apparatus.
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Gellert Jobst U.,CAX ; Babin Denis L.,CAX ; Zhuang Helen Qun,CAX, Seepage system for an injection molding apparatus.
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Paul R. Matysek CA, Shuttle system for an apparatus for injection molding.
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Frederick G. Steil ; Rui Novo ; Frank J. Eigler CA, Thermal expansion compensation support.
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Babin, Denis; Zuest, Randy, Valve bushing assembly.
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Tabassi,Payman, Valve pin bushing with vent channels for an injection molding apparatus.
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Colonico,Gino, Valve pin locking mechanism.
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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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Sealing and retaining bushing for injection molding 원문보기

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