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5458476 Apparatus for shaping fiber reinforced resin matrix materials
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An apparatus for preforming a main body of a racket frame from a softened fiber reinforced thermoplastic resin composite tube includes an inner mold which has a base with a flat face that has an X axis and a Y axis perpendicular to the X axis. The inner mold further has a protrusion projecting from the flat face. The protrusion has an outer periphery which conforms with a contour of a racket frame and which confines a headlike portion and a shaft-like portion along the Y axis. A pressing unit for pressing the composite tube against the outer periphery includes a frame reciprocatable along the Y axis by means of a driving unit, two support members disposed opposite to each other and fixed respectively to the movable frame, two rolls mounted respectively to the support members, and a biasing unit for biasing each roll to press the composite tube against the outer periphery. An outer mold has two opposite halves disposed on two sides of the inner mold and movable along the X axis by means of a moving unit. Each half has a molding face. The molding faces of the halves confine a cavity with the outer periphery and the flat face along the outer periphery when the halves are moved toward the protrusion so as to be combined therewith.
5456981 PROCESS FOR THE MANUFACTURE OF A FIBROUS PREFORM FORMED OF REFRACTORY FIBERS FOR PRODUCING A COMPOSITE MATERIAL ARTICLE Olry Pierre; Coupe Dominique; DuPont Philippe Bordeaux, FRANCE Assigned to Societe Europeenne de Propulsion A process for the manufacture of a fibrous texture for producing a composite material article. The fibrous texture is formed of a yarn comprising discontinuous fibers which are made of a refractory material or a precursor thereof. The discontinuous fibers are disposed parallel to one another, without twist. A covering yam made of a fugitive material is disposed over the discontinuous fibers to provide integrity to the yarn. The covering yarn is eliminated after formation of the fibrous texture.
5456983 COMPOSITE FIBER OF COMMINGLED FIBERGLASS AND POLYTETRAFLUOROETHYLENE AND METHOD OF PRODUCING SAME Newark, DE, UNITED STATES Sassa Robert L Assigned to W L Gore & Associates Inc
338
An improved composite fiber of fiberglass and polytetrafluoroethylene (PTFE) is provided. The composite fiber comprises a coherent strand of commingled filaments of fiberglass and PTFE which is far more resistant to flex, abrasion, and chemical attack than previous fiberglass fibers. Preferably filaments of expanded PTFE tow yarn and filaments of PTFE are combined through a process of air-jet texturing. The fibers of the present invention have a wide range of possible uses, including being formed into a fabric and employed as filter media.
5458476 APPARATUS FOR SHAPING FIBER REINFORCED RESIN MATRIX MATERIALS Medwin Steven J Wilmington, DE, UNITED STATES Assigned to E I Du Pont de Nemours and Company A method of shaping elongated composite structures of a resin matrix reinforced with randomly broken fibers oriented in transverse and non-transverse directions with respect to the longitudinal axis of the structure is implemented by a computer aided apparatus for forming the structure. The apparatus is provided with a heated fixed forming tool, a means for stretching the structure from each end and means associated with the forming tool for separately holding each formed component length of the structure in place against the forming tool. The formed structure is characterized by the particular orientation of the fibers in the transverse and nontransverse direction after the structure is formed.
5458838 HEATING AND EXTRUDING METHOD FOR BULK PREFORM Okumura Toshiak; Ekimoto Takao; Shimamoto Satoshi; Ogawa Katsumi; Tomita Masahiro; Nimura Kobe, JAPAN Yoshitaka; Kadowaki Ryosaku Assigned to Kabushiki Kaisha Kobe Seiko Sho A heating and extruding method for a bulk preform of a fiber reinforced composite material, including a stabbing machine for forming an unpenetrated hole in the bulk preform, a heating machine connected to the stabbing machine for heating the bulk preform by a nitrogen gas, and an extruding machine connected to the heating machine for heating and compressing the bulk preform heated by the heating machine to discharge a predetermined amount of the bulk preform, wherein at least the heating machine to the extruding machine has a sealing structure sealing a nitrogen gas therein. An extruding lip of the extruding machine has a thickness restriction plate and a width restriction plate
An apparatus for preforming a main body of a racket frame from a softened fiber reinforced thermoplastic resin composite tube includes an inner mold which has a base with a flat face that has an X axis and a Y axis perpendicular to the X axis. The inner mold further has a protrusion projecting from the flat face. The protrusion has an outer periphery which conforms with a contour of a racket frame and which confines a headlike portion and a shaft-like portion along the Y axis. A pressing unit for pressing the composite tube against the outer periphery includes a frame reciprocatable along the Y axis by means of a driving unit, two support members disposed opposite to each other and fixed respectively to the movable frame, two rolls mounted respectively to the support members, and a biasing unit for biasing each roll to press the composite tube against the outer periphery. An outer mold has two opposite halves disposed on two sides of the inner mold and movable along the X axis by means of a moving unit. Each half has a molding face. The molding faces of the halves confine a cavity with the outer periphery and the flat face along the outer periphery when the halves are moved toward the protrusion so as to be combined therewith.
5456981 PROCESS FOR THE MANUFACTURE OF A FIBROUS PREFORM FORMED OF REFRACTORY FIBERS FOR PRODUCING A COMPOSITE MATERIAL ARTICLE Olry Pierre; Coupe Dominique; DuPont Philippe Bordeaux, FRANCE Assigned to Societe Europeenne de Propulsion A process for the manufacture of a fibrous texture for producing a composite material article. The fibrous texture is formed of a yarn comprising discontinuous fibers which are made of a refractory material or a precursor thereof. The discontinuous fibers are disposed parallel to one another, without twist. A covering yam made of a fugitive material is disposed over the discontinuous fibers to provide integrity to the yarn. The covering yarn is eliminated after formation of the fibrous texture.
5456983 COMPOSITE FIBER OF COMMINGLED FIBERGLASS AND POLYTETRAFLUOROETHYLENE AND METHOD OF PRODUCING SAME Newark, DE, UNITED STATES Sassa Robert L Assigned to W L Gore & Associates Inc
338
An improved composite fiber of fiberglass and polytetrafluoroethylene (PTFE) is provided. The composite fiber comprises a coherent strand of commingled filaments of fiberglass and PTFE which is far more resistant to flex, abrasion, and chemical attack than previous fiberglass fibers. Preferably filaments of expanded PTFE tow yarn and filaments of PTFE are combined through a process of air-jet texturing. The fibers of the present invention have a wide range of possible uses, including being formed into a fabric and employed as filter media.
5458476 APPARATUS FOR SHAPING FIBER REINFORCED RESIN MATRIX MATERIALS Medwin Steven J Wilmington, DE, UNITED STATES Assigned to E I Du Pont de Nemours and Company A method of shaping elongated composite structures of a resin matrix reinforced with randomly broken fibers oriented in transverse and non-transverse directions with respect to the longitudinal axis of the structure is implemented by a computer aided apparatus for forming the structure. The apparatus is provided with a heated fixed forming tool, a means for stretching the structure from each end and means associated with the forming tool for separately holding each formed component length of the structure in place against the forming tool. The formed structure is characterized by the particular orientation of the fibers in the transverse and nontransverse direction after the structure is formed.
5458838 HEATING AND EXTRUDING METHOD FOR BULK PREFORM Okumura Toshiak; Ekimoto Takao; Shimamoto Satoshi; Ogawa Katsumi; Tomita Masahiro; Nimura Kobe, JAPAN Yoshitaka; Kadowaki Ryosaku Assigned to Kabushiki Kaisha Kobe Seiko Sho A heating and extruding method for a bulk preform of a fiber reinforced composite material, including a stabbing machine for forming an unpenetrated hole in the bulk preform, a heating machine connected to the stabbing machine for heating the bulk preform by a nitrogen gas, and an extruding machine connected to the heating machine for heating and compressing the bulk preform heated by the heating machine to discharge a predetermined amount of the bulk preform, wherein at least the heating machine to the extruding machine has a sealing structure sealing a nitrogen gas therein. An extruding lip of the extruding machine has a thickness restriction plate and a width restriction plate