[특허]Injection molding nozzle having grounded heating element brazed into pointed tip

Injection molding nozzle having grounded heating element brazed into pointed tip 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B29C-045/20
출원번호	US-0123910 (1987-11-23)
우선권정보	CA-0549518 (1987-10-16)
발명자 / 주소	Schmidt Harald H. (Georgetown CAX) Gellert Jobst U. (Georgetown CAX)
출원인 / 주소	Mold-Masters Limited (Georgetown CAX 03)
인용정보	피인용 횟수 : 24 인용 특허 : 0

초록 ▼

This invention relates to an improved injection molding nozzle having an integral electrical heating element. The nozzle has an elongated nose portion extending to a forward end from a cylindrical central portion. The heating element is brazed in a spiral channel around a central melt bore in the central portion of the nozzle, and extends into the nose portion to a forward end which is grounded by brazing it in nickel adjacent a high speed steel insert portion at the forward end of the nozzle. This forms a pointed tip at the forward end of the nozzle which is corrosion and wear resistant and can be heated to a predetermined temperature. In alternative embodiments, the forward end of the heating element can be brazed in nickel adjacent the forward end without the high speed steel insert portion and/or the nose portion can be inclined with the forward end of the heating element being grounded adjacent an end gate rather than a separate gate. The mass of the central portion and the elongated tapered shape of the nose portion which permits relatively rapid temperature changes of the melt in the gate area enable the nozzle having a single heating element to be used for temperature assisted gating.

대표청구항 ▼

In an elongated integral injection molding nozzle having a forward end and a rear end with a central portion having a generally cylindrical outer surface extending between a steel collar portion adjacent the rear end and a nose portion adjacent the forward end, the nose portion having a tapered outer surface leading to the forward end, the nozzle having a melt bore with first and second portions, the first portion extending centrally from the rear end through the central portion and joining the second portion which extends diagonally to the tapered surface of the nose portion, the nozzle having an electrically insulated heating element with a rear end and a forward end, the heating element having one portion extending diagonally into the nose portion to a forward end of the heating element and another portion integrally brazed in a spiral channel in the cylindrical outer surface of the central portion, the rear end of the heating element extending out through a radial opening in the collar portion to a cold terminal, the heating element having a resistance wire extending centrally through an electrical insulating material in an outer casing, the outer surface of the central portion and the heating element brazed in the spiral channel therein being covered with a protective coating, the improvement wherein: the central resistance wire at the forward end of the heating element is exposed and integrally brazed in an electrically conductive brazing material to ground the heating element adjacent the forward end of the nozzle, whereby the forward end of the nozzle can be heated to a predetermined temperature.

이 특허를 인용한 특허 (24)

Schmidt, Harald, Apparatus and method for heating injection molding fluid.
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Schmidt,Harald Hans, Apparatus for heating injection molding fluid.
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Jenko Edward J., Detachable nozzle body.
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Babin,Denis; Olaru,George, Gap seal between nozzle components.
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McGrevy Alan N., Heater block with unitized removable heat conductive member.
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Babin,Denis; Colonico,Gino, Hot runner nozzle with a tip, a tip surrounding piece and an alignment piece.
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Babin,Denis; Olaru,George, Injection molding apparatus having a nozzle tip and a tip surrounding piece of equal thermal conductivity.
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Fairy,Fabrice, Injection molding nozzle.
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Olaru, Gheorghe, Injection molding nozzle.
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Olaru,George, Injection molding nozzle.
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Gellert Jobst Ulrich,CAX ; Babin Denis L.,CAX ; Olaru George T,CAX, Injection molding nozzle apparatus.
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Gellert Jobst Ulrich,CAX ITX L7G 2X1, Injection molding nozzle guide and sealing ring.
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Gellert Jobst U. (7A Prince Street Georgetown ; Ontario CAX L7G 2X1), Injection molding nozzle having nose portion with heating element encircling the bore.
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Babin,Denis; Guenther,Hans; Goslinski,Rhonda, Injection molding nozzle with wear-resistant tip having diamond-type coating.
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Babin,Denis, Injection nozzle system and injection molding machine incorporating same.
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Babin, Denis; Guenther, Hans; Ho, Nin, Injection nozzle system for an injection molding machine.
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Guenther,Hans; Olaru,George, Injection nozzle system for an injection molding machine.
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Gellert Jobst U. (7A Prince Street Georgetown ; Ontario CAX L7G 2X1), Method of making an injection molding nozzle having nose portion with heating element encircling the bore.
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Gellert Jobst U. (7A Prince Street Georgetown ; Ontario CAX L7G 2X1), Method of manufacture of an electrical terminal on an injection molding nozzle.
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Olaru, George, Nozzle for an injection molding apparatus.
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Fischer,Jonathon; Babin,Denis, Nozzle tip and seal.
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Olaru,George, Nozzle tip and seal.
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Sicilia, Rob; Babin, Denis, Valve pin guide for a valve-gated nozzle.
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Babin,Denis, Valve pin guiding tip for a nozzle.
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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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Injection molding nozzle having grounded heating element brazed into pointed tip 원문보기

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Injection molding nozzle having grounded heating element brazed into pointed tip 원문보기

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