[특허]Multiaxis rotational molding method, apparatus and structure

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Multiaxis rotational molding method, apparatus and structure

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B29C-045/33
미국특허분류(USC)	264/040.5 ; 264/310 ; 264/328.11 ; 425/004R ; 425/150 ; 425/435 ; 425/576
출원번호	US-0194075 (2000-10-31)
국제출원번호	PCT/US96/15498 (1996-09-26)
§371/§102 date	20001031 (20001031)
국제공개번호	WO-9716297 (1997-05-09)
발명자 / 주소	Payne LeRoy
대리인 / 주소	Urban
인용정보	피인용 횟수 : 2 인용 특허 : 2

초록
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Multiaxis rotational molding apparatus (11) includes a plurality of spaced generally horizontally oriented arm members (17-20) each having one end (21) extending from an upstanding frame section (22) with one mold assembly (32-35) rotatably mounted adjacent a free end thereof. Each mold assembly includes a plurality of separable mold sections (36) including plate sections (38). A plurality of movable elongated mixing chambers (47-49), each including a plurality of adjacent axially aligned rotatable driven mixing sections (52-54). A control portion (15) includes an indexing mechanism (67, 68) sequentially orienting a dispenser of each mixing chamber with each mold assembly to control formation of molded structures continuously in a preselected multiaxis molding profile. Also, a method of forming molded structures with the molding apparatus is disclosed.

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[ What is claimed is:] [1.]1. Multiaxis rotational molding apparatus including a support portion, a molding portion, a mixing portion and a control portion; said support portion including an upstanding frame section, a plurality of spaced generally horizontally oriented arm members each having one end extending from said upstanding frame section; said molding portion including a plurality of mold supporting assemblies with one supporting assembly rotatably mounted adjacent a free end of each of said arm members, each of said mold supporting assemblies including an independently rotatable mold connector section, each of said mold supporting assemblies including a central passage therethrough from a rotatable connection with said arm member and through said mold connector section, a plurality of mold assemblies each including a plurality of separable mold sections forming a substantially enclosed cavity, connecting means selectively securing said mold sections of one mold assembly together and to said mold connector section; said mixing portion including a plurality of independently movable elongated mixing chambers adjustably mounted on said frame section adjacent said mold assemblies, each of said mixing chambers including a plurality of adjacent axially aligned rotatable mixing sections, independent drive means rotating each of said mixing sections about a central axis; said control portion including indexing means disposed on said frame section sequentially orienting each of said mixing chambers with each mold cavity, actuating means rotating each mold connector section and said mold assembly affixed thereto and actuating means pivoting each mold supporting assembly and said mold assembly affixed thereto with respect to said arm member, programmable memory means storing preselected operating parameters, monitoring means sensing operating information from control components, circuitry transmitting signals from said monitoring means to coordinating means comparing said operating information with said operating parameters stored in said memory means and activating said indexing means and said actuating means to control formation of molded structures with said molding apparatus continuously in a preselected multiaxis molding profile. [14.]14. A method of continuously forming integrally molded structures in a multiaxis rotational molding operation including the steps of forming a plurality of preselected polymerizable mixtures including mixing liquid reactive resin forming material and particulate solid additive material substantially continuously while tumbling said materials along a generally cylindrical path in a preselected orientation and reversing the direction of said tumbling as said materials advance along said cylindrical path; rotating a plurality of multisection mold assemblies about a plurality of axes, indexing a freshly formed supply of a first polymerizable mixture into alignment with a first mold assembly, flowing said first polymerizable mixture over surfaces of a first enclosed mold cavity within said first mold assembly, monitoring said flowing of said first mixture over said first mold cavity surfaces and formation of a first resin therefrom, indexing said supply of said first polymerizable mixture into alignment with an adjacent second mold assembly, flowing said first polymerizable mixture over surfaces of a second enclosed mold cavity within said second mold assembly, simultaneously therewith indexing a freshly formed supply of a second polymerizable mixture into alignment with said first mold assembly, flowing said second polymerizable mixture over said first resin within said first mold cavity, monitoring said flowing of said first and second mixtures within said first and second mold cavities and formation of a first and second resin therefrom, indexing said supply of said first polymerizable mixture into alignment with an adjacent third mold assembly, flowing said first polymerizable mixture over surfaces of a third enclosed mold cavity within said third mold assembly, simultaneously therewith indexing said supply of said second polymerizable mixture into alignment with said second mold assembly, flowing said second polymerizable mixture over said first resin within said second mold cavity, monitoring said flowing of said first and second polymerizable mixtures within said second and third mold cavities and formation of first and second resins therefrom, continuing said indexing of said supplies of other of said polymerizable mixtures into alignment with said mold assemblies and the flowing of said mixtures into the respective mold cavities until all of the mold assemblies have received all of said mixtures, monitoring said flowing of said mixtures and formation of resins therefrom, continuing said rotation of said mold assemblies throughout said steps of said continuous molding operation while monitoring individually each axis rotation of said mold assemblies, and coordinating said monitored flowing of each mixture and said monitored formation of each resin with each monitored axis rotation in a preselected profile to form said integrally molded structures of said resins, separating said mold sections of each mold assembly after each integrally molded structure therein has achieved structural integrity within said mold cavity, removing said integrally molded structure from said separated mold sections and repeating said steps to form a multiplicity of said integrally molded structures on a continuing basis.15. A method of continuously forming integrally molded structures according to the method of claim 14 including the step of changing orientation along preselected sections of said cylindircal path during formation of said polymerizable mixtures.16. A method of continuously forming integrally molded structures according to the method of claim 14 including the step of adding materials along preselected sections of said cylindrical path during formation of said polymerizable mixtures.17. A method of continuously forming integrally molded structures according to the method of claim 14 including the steps of transferring each mold assembly to an adjacent mold receiving station prior to separating said mold sections and removing said structure from said separated mold sections and thereafter returning said mold assembly to a molding position for repeating the above steps.18. A method of continuously forming integrally molded structures according to the method of claim 14 including the step of changing the position of said mold sections with respect to each other prior to reassembling said mold sections and repeating the above steps.19. A method of continuously forming integrally molded structures according to the method of claim 14 including the steps of introducing solid particles into a mold cavity and distributing said particles into a preselected configuration before indexing said supplies of said polymerizable mixtures into alignment with said mold assemblies.

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Multiaxis rotational molding method, apparatus and structure

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Multiaxis rotational molding method, apparatus and structure

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