[특허]Method and apparatus for injection molding of plastic closures

Method and apparatus for injection molding of plastic closures 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B29C-007/00
출원번호	US-0792500 (1977-05-02)
발명자 / 주소	Aichinger Dietmar (Arlesheim CHX)
출원인 / 주소	Albert Obrist AG (Reinach CHX 03)
인용정보	피인용 횟수 : 27 인용 특허 : 0

초록 ▼

A method for molding a plastic closure cap unit for a container, which cap unit comprises an internally threaded upper closure cap and a downwardly extending skirt forming a sealing ring connected thereto through an intermediate shear zone of reduced thickness, the sealing ring increasing in thickness downwardly from the shear zone and being devoid of abrupt changes in contour such as would preclude axial removal of the cap and sealing ring from a non-expanding mold surrounding the sealing ring, comprises injecting molten plastic into a mold shaped to form the cap unit and including fixed and movable sections forming mold surfaces, disengaging the mold from the outer surface of the upper closure cap by axial movement of the related mold section relative to the remaining sections, then disengaging the mold from the inner surfaces of the closure cap and sealing ring by axial movement of the related mold section relative to the remaining section of the mold still surrounding the outer wall of the sealing ring up to the lower rim of the upper closure cap, and then disengaging the mold from the cap unit by axial movement of the cap unit relative to the remaining section of the mold surrounding the sealing ring. The mold itself comprises first and second female mold sections engageable to form the outer surfaces respectively of the upper closure cap and the sealing ring, and a male mold section cooperating with the female mold sections to form the inner surface of the closure cap unit. Mold operating means effect the axial movements to effect removal of the cap unit from the mold.

대표청구항 ▼

Apparatus for forming a molded thermoplastic closure cap unit for a container, said cap unit having an upper closure cap with a generally cylindrical wall portion including an inner surface with an integrally molded internal spiral-screw thread and an outer surface, said generally cylindrical wall portion having a downwardly extending integrally molded generally cylindrical skirt forming a sealing ring, and an intermediate shear zone having a reduced thickness in cross section and forming a connection between said sealing ring and the lower annular rim of said upper closure cap, said sealing ring increasing in thickness downwardly from the shear zone and as it increases in thickness being devoid of abrupt changes in the contour of its walls such as would preclude axial removal of the cap and sealing ring from a non-expanding mold surrounding the sealing ring during formation in a molding process, said apparatus having a plurality of relatively axially movable mold sections and comprising (a) a first female mold section having a cavity and being constructed to form said outer surface of said upper closure cap, (b) a second female mold section having a cavity and being constructed to form the outer surface of said sealing ring and shear zone, said second female mold section being engageable with said first female mold section so as to form a combined female mold section for integrally molding the outer surfaces of said upper closure cap and said sealing ring, said second female mold cavity being at least partially reduced in diameter in the area engageable with said first female mold section such that said second female mold section forms at least the outer part of the lower annular rim of said upper closure cap, (c) an axially movable, non-rotary male mold section cooperating with said first and second female mold sections and being constructed to form said threaded inner surface of said closure cap unit, and (d) mold operating means drivingly connected to said mold sections so as to effect, sequentially, after the molding process (i) disengagement of said first female mold section from the closure cap by axial movement relative to said second female mold section and relative to said male mold section, (ii) disengagement of said male section from said cap unit by non-rotary axial movement of said male section relative to said second female mold section, and (iii) disengagement of said second female mold section from said sealing ring by axial movement of said cap unit relative to said second female mold section.

이 특허를 인용한 특허 (27)

Joseph Ealias C,CAX, Apparatus for ejecting threaded injection molded parts.
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Hannon Charles N. (Scarsdale NY) Vallender Leonard J. (Valhalla NY), Apparatus for forming a pilfer proof container closure.
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Webster Charles A. (Oak Lawn IL) John Christian J. (Downers Grove IL), Apparatus for making tamper-evident closures.
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Thakor Paresh ; Fricke Mark R., Apparatus for manufacturing a tampered-evident closure having a plurality of tabs molded to extend radially upward and inward.
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Nichols Robert L. (808 Ft. Worth St. Jacksonville TX 75766), Composite die for forming a plunger for use in a shutoff valve for a medical suction apparatus.
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Busch Peter (Bochum DEX) Barbet Karl-Heinz (Korschenbroich DEX), Injection mold.
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Sheffield James S. (Alliston CAX) Van Halteren Jacob (Richmond Hill CAX), Injection mold apparatus with gas ejection.
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Cole, Harold E., Injection mold for a bottle closure device.
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Buzzell Keith G. ; Dowd Clinton, Injection molding parts with fastener elements.
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Harvey Andrew C., Injection molding products having fastener elements.
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Blenkush Brian J. (Maple Grove MN), Male insert member having integrally molded part line free seal.
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Mayer Bruno Franz P., Method of forming a reseal element for a needleless injection site.
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Schweigert Lothar ; O Ui Hwan, Method of injection molding a container.
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Taha, Saad, Mold assembly for a container closure.
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Cochrane Benjamin A. (181 Sonora Ave. Danville CA 94526), Mold for improved press-on cap and seal.
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Dutt, Herbert V.; Santostasi, Paul A., Mold for making tamper-proof closure.
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Allen, David O.; Wombold, Harry A. E., Molded container and opening means therefore.
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Nolan Robert L. (New York NY), Molding.
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Nilsson, Hugo, Package closure and a device and a method for producing a package closure.
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Dorn Henry J. (Frackville PA) Zumbuhl Bruno (Conyngham PA), Pilfer-resistant plastic closure.
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von Holdt ; Sr. John W. ; von Holdt ; Jr. John W., Plastic bucket and lid.
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Wilde Sheldon L. (Crawfordsville IN) McCandless Thomas J. (Crawfordsville IN) Saunders Robert M. (Ladoga IN), Process for making a closure.
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Conti Vincent N. (West Hempstead NY), Process of removing a plastic cap from a mold.
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Aoki Katashi (6037 Ohazaminamijo Sakakimachi ; Hanishina-gun ; Nagano-ken JPX), Rotary type injection molding machine.
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Jones Narda A. ; Mathes Todd E. ; Minnette Jeffrey C. ; Montgomery Gary V. ; Shankland William J., Safety closure with tamper-resistant locking tab and method and apparatus for making same.
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Drew H. McNary ; William D. Armstrong, Tamper-indicating closure with resilient locking projections.
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McNary, Drew H.; Armstrong, William D., Tamper-indicating closure with resilient locking projections.
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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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메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
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연합인증

Method and apparatus for injection molding of plastic closures 원문보기

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Method and apparatus for injection molding of plastic closures 원문보기

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연구과제 타임라인

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이 특허를 인용한 특허 (27)

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