Method and apparatus for injection molding parts which have at least one cavity
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0790212
(2001-02-21)
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우선권정보 |
DE-0007994 (2000-02-22) |
발명자
/ 주소 |
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출원인 / 주소 |
|
대리인 / 주소 |
Hamilton, Brook, Smith & Reynolds, P.C.
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인용정보 |
피인용 횟수 :
1 인용 특허 :
9 |
초록
▼
The invention relates to a method and an apparatus for injection molding thermoplastic molded parts, having at least one cavity. The method comprises the following steps: a) injecting thermoplastic melt from an injection unit along a melt flow path into the cavity of an injection molding tool; b) in
The invention relates to a method and an apparatus for injection molding thermoplastic molded parts, having at least one cavity. The method comprises the following steps: a) injecting thermoplastic melt from an injection unit along a melt flow path into the cavity of an injection molding tool; b) injecting a fluid into the still liquid plastic material, so that the plastic material is pressed against the walls of the cavity; c) allowing the plastic material to cool until it forms the self-supporting molded part; and d) removing the molded part from the cavity of the injection molding tool.
대표청구항
▼
The invention relates to a method and an apparatus for injection molding thermoplastic molded parts, having at least one cavity. The method comprises the following steps: a) injecting thermoplastic melt from an injection unit along a melt flow path into the cavity of an injection molding tool; b) in
The invention relates to a method and an apparatus for injection molding thermoplastic molded parts, having at least one cavity. The method comprises the following steps: a) injecting thermoplastic melt from an injection unit along a melt flow path into the cavity of an injection molding tool; b) injecting a fluid into the still liquid plastic material, so that the plastic material is pressed against the walls of the cavity; c) allowing the plastic material to cool until it forms the self-supporting molded part; and d) removing the molded part from the cavity of the injection molding tool. gradient technique. 14. A method according to claim 9, wherein said controlled pattern is provided by applying a waveform to the potential on at least one pair of electrostatic quadropole lenses. 15. A method for forming a controlled-dimension and controlled-morphology membrane by electrospinning a plurality of polymer fibers from a conducting fluid containing said polymer in the presence of an electric field established between a solution introduction device and a ground source, said method comprising: a) forming a plurality of electrospinniflg jet streams of said conducting fluid; b) independently controlling the flow characteristics of at least one of said jet streams; and c) forming a membrane. 16. A method according to claim 15, wherein said flow characteristics of at least one of said jet streams are controlled by at least one scanning electrode. 17. A method according to claim 15, wherein said flow characteristics of at least one or more of said jet streams are controlled by at least one pair of scanning electrodes. 18. A method according to claim 15, wherein said solution introduction device consists of a plurality of electrospinning spinnerets. 19. A method according to claim 18, wherein each spinneret produces an individual jet stream of said conducting fluid. 20. A method according to claim 19, wherein the flow characteristics of each individual jet stream is independently controlled. 21. A method according to claim 20, wherein each spinneret has at least one scanning electrode for electrically independently controlling the flow characteristics of each individual jet stream. 22. A method according to claim 21, wherein each spinneret has two pairs of scanning electrodes for electrically controlling the flow characterists of each individual jet stream. 23. A method according to claim 18, wherein at least two spinnerets deliver different conducting fluids. 24. A method according to claim 23, wherein said different conducting fluids refers to different concentrations of polymer, different polymers, different polymer blends, different additives and/or different solvents. 25. An electrospinning apparatus for forming a membrane, comprising: a conducting fluid introduction device for providing a quantity of conducting fluid containing a polymer, said conducting fluid introduction device comprising a plurality of electrospinning spinnerets for delivering said conducting fluid, said spinnerets being electrically charged at a first potential; a ground member positioned adjacent said spinnerets and electrically charged at a second potential different from said first potential, thereby establishing an electric field between said spinnerets and said ground member; a support member disposed between said spinnerets and said ground member and movable to receive conducting fluid from said spinnerets; and means for controlling the flow characteristics of conducting fluid from at least one spinneret independently from the flow of conducting fluid from another spinneret. 26. An electrospinning apparatus according to claim 25, wherein said means for independently controlling the flow characteristics comprises at least one electrode disposed adjacent each spinneret, each electrode being charged at a potential different from and separate from said first potential. 27. An electrospinning apparatus according to claim 26, wherein each spinneret has two pairs of scanning electrodes for electrically separately directing the flow characteristics of conducting fluid from said spinneret. 28. An electrospinning apparatus according to claim 26, further comprising a probe associated with at least one spinneret, said probe being disposed between said electrode and said ground member, said probe being electrically charged at a potential different from said spinneret and said electrode. 29. An electrospinning apparatus according to claim 25, wherein said means for independently controlling said flow characteristics comprises a means for
이 특허에 인용된 특허 (9)
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Ibar Jean-Pierre, Apparatus for controlling gas assisted injection molding to produce hollow and non-hollow plastic parts and modify their.
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Gosdin Michael,DEX, Apparatus for producing hollow plastic objects with pressurized gas injection after overflow cut-off.
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Mikael Hildesson SE; Tor Hesselgren SE; Lars Odelmark SE, Method and device for manufacturing a hollow plastic component.
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Friederich ; Ernst, Method for injection molding of hollow shaped bodies from thermoplastic resins.
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Shah Chandrakant S. (4433 Clarke Troy MI 48098), Method of and apparatus for dual fluid injection molding.
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Baxi Indra R. (Solon OH), Pressurization control unit for a gas-assisted injection molding machine.
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Thomas, Ronald, Process for gas assisted and water assisted injection molding.
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Hettinga Siebolt (2123 NW. 111th St. Des Moines IA 50325), Process for injection molding a hollow plastic article.
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Gotterbauer Klaus,DEX, Process of and an apparatus for injection molding hollow-blown plastic bodies.
이 특허를 인용한 특허 (1)
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Magalhaes,Rui Miguel de Azevedo; Smith,Gordon Frederick, Gas injection moulding method and apparatus.
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