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公开(公告)号：DE3768849D1
公开(公告)日：1991-05-02
申请号：DE3768849
申请日：1987-04-07
Applicant: UNITED TECHNOLOGIES CORP
Inventor： FAIZ ROBERT LEE , WALKER WILLIAM J , RAMEY PHILIP , ADAMS KENNETH M , FLONC NICHOLAS P , NGUYEN DEAN
Abstract: A shrinkable foam mandrel that can be easily removed and composite resin transfer molding process that uses the foam mandrel. The foam is dimensionally stable at a first temperature that typically corresponds to the cure temperature of the composite resin. The foam is capable of irreversibly shrinking to less than about 0.5 said foam's original size at a second temperature that is above said first temperature. The foam is encapsulated by a non-stick elastomer skin and covered with fibers. The fiber covered elastomer encapsulated foam is disposed in a female mold cavity and resin is injected into the female mold cavity. The resin and fibers are cured and the resulting composite component is removed from the female mold. The temperature is raised to the second temperature and the elastomer encapsulated foam male mandrel irreversibly shrinks to less than about 0.5 its original size. Finally the shrunken male mandrel is removed from said composite component. These mandrels are a solution to the aerospace industry's flyaway mandrel problem as they are lightweight and can easily be removed from the composite component.
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公开(公告)号：ES2001326B3
公开(公告)日：1991-11-16
申请号：ES87630056
申请日：1987-04-07
Applicant: UNITED TECHNOLOGIES CORP
Inventor： FAIZ ROBERT LEE , WALKER WILLIAM J , RAMEY PHILIP , ADAMS KENNETH M , FLONC NICHOLAS P , NGUYEN DEAN
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公开(公告)号：AU7152687A
公开(公告)日：1987-10-29
申请号：AU7152687
申请日：1987-04-13
Applicant: UNITED TECHNOLOGIES CORP
Inventor： FAIZ ROBERT LEE , WALKER WILLIAM J , RAMEY PHILIP , ADAMS KENNETH M , FLONC NICHOLAS P , NGUYEN DEAN
Abstract: A shrinkable foam mandrel that can be easily removed and composite resin transfer molding process that uses the foam mandrel. The foam is dimensionally stable at a first temperature that typically corresponds to the cure temperature of the composite resin. The foam is capable of irreversibly shrinking to less than about 0.5 said foam's original size at a second temperature that is above said first temperature. The foam is encapsulated by a non-stick elastomer skin and covered with fibers. The fiber covered elastomer encapsulated foam is disposed in a female mold cavity and resin is injected into the female mold cavity. The resin and fibers are cured and the resulting composite component is removed from the female mold. The temperature is raised to the second temperature and the elastomer encapsulated foam male mandrel irreversibly shrinks to less than about 0.5 its original size. Finally the shrunken male mandrel is removed from said composite component. These mandrels are a solution to the aerospace industry's flyaway mandrel problem as they are lightweight and can easily be removed from the composite component.
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Patent Agency Ranking
公开(公告)号：CA2050144A1
公开(公告)日：1992-03-07
申请号：CA2050144
申请日：1991-08-28
Applicant: UNITED TECHNOLOGIES CORP
Inventor： FLONC NICHOLAS P , BRACE MICHAEL W
IPC: B29B11/16 , B29B15/08 , B29B15/10 , B29C70/54 , B29K101/10 , B29K105/06 , B29L9/00
Abstract: A method for forming stabilized preforms for complex composite articles is disclosed using a solid meltable uncatalyzed thermosetting resin as the stabilizing agent. The resin is applied to each layer of the preform and heated to melt the resin and bond the layers together. After cooling, the resin resolidifies but does not set and thereby holds the layers in the desired preform shape. The layers can be first formed into a flat sheet as a raw material from which shaped preforms can be made by cutting the sheet into sections which are placed over a mandrel and reheating to thereby remelt the solid resin to allow the preform to conform to the shape of the mandrel. Utilizing this process allows complex composite parts to be easily preformed and assembled prior to placement in a mold for resin injection molding, without inhibiting part strength as the resin is compatible with the injection resin and is cocatalyzed by the catalyst contained in the injection resin.
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公开(公告)号：AU584571B2
公开(公告)日：1989-05-25
申请号：AU7152687
申请日：1987-04-13
Applicant: UNITED TECHNOLOGIES CORP
Inventor： FAIZ ROBERT LEE , WALKER WILLIAM J , RAMEY PHILIP , ADAMS KENNETH M , FLONC NICHOLAS P , NGUYEN DEAN
Abstract: A shrinkable foam mandrel that can be easily removed and composite resin transfer molding process that uses the foam mandrel. The foam is dimensionally stable at a first temperature that typically corresponds to the cure temperature of the composite resin. The foam is capable of irreversibly shrinking to less than about 0.5 said foam's original size at a second temperature that is above said first temperature. The foam is encapsulated by a non-stick elastomer skin and covered with fibers. The fiber covered elastomer encapsulated foam is disposed in a female mold cavity and resin is injected into the female mold cavity. The resin and fibers are cured and the resulting composite component is removed from the female mold. The temperature is raised to the second temperature and the elastomer encapsulated foam male mandrel irreversibly shrinks to less than about 0.5 its original size. Finally the shrunken male mandrel is removed from said composite component. These mandrels are a solution to the aerospace industry's flyaway mandrel problem as they are lightweight and can easily be removed from the composite component.
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公开(公告)号：ES2001326A4
公开(公告)日：1988-05-16
申请号：ES87630056
申请日：1987-04-07
Applicant: UNITED TECHNOLOGIES CORP
Inventor： WALKER WILLIAM J , NGUYEN DEAN , FAIZ ROBERT LEE , ADAMS KENNETH M , FLONC NICHOLAS P , RAMEY PHILIP
Abstract: UN MANDRIL DE ESPUMA DE LATEX CONTRAIBLE QUE PUEDE SER FACILMENTE SEPARADO Y UNA RESINA COMPUESTA CAMBIAN EL PROCESO DE MOLDEADO QUE USA EL MANDRIL DE ESPUMA DE LATEX. LA ESPUMA ES DIMENSIONALMENTE ESTABLE A UNA PRIMERA TEMPERATURA QUE CORRESPONDE A LA TEMPERATURA DE FRAGUADO DE LA RESINA COMPUESTA. LA ESPUMA ES CAPAZ DE CONTRAERSE IRREVERSIBLEMENTE A MENOS DE ALREDEDOR DEL 0,5 DEL TAMAÑO ORIGINAL DE LA MISMA A UNA SEGUNDA TEMPERATURA QUE ESTA ALREDEDOR DE LA PRIMERA. LA ESPUMA DE LATEX SE ENCAPSULA MEDIANTE UNA CUBIERTA ELASTOMERICA Y SE CUBRE CON FIBRAS. LA ESPUMA ASI ENCAPSULADA SE DISPONE EN UNA CAVIDAD DE MOLDE HEMBRA Y LA RESINA SE INYECTA EN EL INTERIOR DE DICHA CAVIDAD. LA RESINA Y LAS FIBRAS FRAGUAN Y EL COMPONENTE COMPUESTO SE SEPARA DEL MOLDE HEMBRA. LA TEMPERATURA SE ELEVA A LA SEGUNDA TEMPERATURA Y EL MANDRIL MACHO DE ESPUMA DE LATEX DE ENCAPSULADO ELASTOMERO SE CONTRAE IRREVERSIBLEMENTE A MENOS DE LA MITAD DE SU TAMAÑO ORIGINAL. FINALMENTE EL MANDRIL MACHO CONTRAIDO SE SEPARADE DICHO COMPONENTE COMPUESTO. ESTOS MANDRILES SON UNA SOLUCION PARA LOS PROBLEMAS DE LA INDUSTRIA AEROESPACIAL POR SER MUY LIGEROS DE PESO Y PODER FACILMENTE SEPARARSE DEL COMPONENTE COMPUESTO.
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公开(公告)号：CA1273772A
公开(公告)日：1990-09-11
申请号：CA533346
申请日：1987-03-30
Applicant: UNITED TECHNOLOGIES CORP
Inventor： FAIZ ROBERT L , WALKER WILLIAM J , RAMEY PHILIP , ADAMS KENNETH M , FLONC NICHOLAS P , NGUYEN DEAN
Abstract: Removable Irreversibly Shrinking Male Mandrel A shrinkable foam mandrel that can be easily removed and composite resin transfer molding process that uses the foam mandrel. The foam is dimensionally stable at a first temperature that typically corresponds to the cure temperature of the composite resin. The foam is capable of irreversibly shrinking to less than about 0.5 said foam's original size at a second temperature that is above said first temperature. the foam is encapsulated by a non-stick elastomer skin and covered with fibers. The fiber covered elastomer encapsulated foam is disposed in a female mold cavity and resin is injected into the female mold cavity. The resin and fibers are cured and the resulting composite component is removed from the female mold. The temperature is raised to the second temperature and the elastomer encapsulated foam male mandrel irreversibly shrinks to less than about 0.5 its original size. Finally the shrunken male mandrel is removed from said composite component. These mandrels are a solution to the aerospace industry's flyaway mandrel problem as they are lightweight and can easily be removed from the composite component.
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公开(公告)号：BR8702019A
公开(公告)日：1988-02-09
申请号：BR8702019
申请日：1987-04-27
Applicant: UNITED TECHNOLOGIES CORP
Inventor： FAIZ ROBERT LEE , RAMEY PHILIP , FLONC NICHOLAS P , WALKER WILLIAM J , ADAMS KENNETH M , NGUYEN DEAN
Abstract: A shrinkable foam mandrel that can be easily removed and composite resin transfer molding process that uses the foam mandrel. The foam is dimensionally stable at a first temperature that typically corresponds to the cure temperature of the composite resin. The foam is capable of irreversibly shrinking to less than about 0.5 said foam's original size at a second temperature that is above said first temperature. The foam is encapsulated by a non-stick elastomer skin and covered with fibers. The fiber covered elastomer encapsulated foam is disposed in a female mold cavity and resin is injected into the female mold cavity. The resin and fibers are cured and the resulting composite component is removed from the female mold. The temperature is raised to the second temperature and the elastomer encapsulated foam male mandrel irreversibly shrinks to less than about 0.5 its original size. Finally the shrunken male mandrel is removed from said composite component. These mandrels are a solution to the aerospace industry's flyaway mandrel problem as they are lightweight and can easily be removed from the composite component.
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