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Hlavaty David Gerard, Ashtiani Zarandi Mansour: Method for making an electrode for electrical discharge machining by use of a stereolithography model. Gen Motors, September 4, 1996: EP0729823-A1 (5 worldwide citation)

The present invention provides an improved method for rapidly making an electrode for electrical discharge machining. According to the invention, a stereolithography process is used to make a cured resin model (22) of the electrode and having a network of interconnected supporting members defining t ...


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Ashida Kaneyoshi, Ashtiani Zarandi Mansour: Self-reinforcing polyurethane compositions.. Gen Motors, January 8, 1992: EP0464886-A2 (4 worldwide citation)

A polyurethane liquid crystal polymer-reinforced RIM composition having superior impact strength and flexural modulus is produced by a reaction-injection-moulding process. The chemistry involved in the preparation of this reinforced RIM material includes the simultaneous reaction and formation of a ...


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Hlavaty David Gerard, Ashtiani Zarandi Mansour: Rapid making of a prototype part or mold using stereolithography model. Gen Motors, September 4, 1996: EP0729824-A1

A structural prototype of the component part is made by first creating a cured resin model of the part, having a network of interconnected supporting members defining the shape of the part and leaving channels (28) between the supporting members to drain away uncured resin from the model. After the ...


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Hlavaty David Gerard, Ashtiani Zarandi Mansour: Production of constitutional part and mold. General Motors Corp &Lt Gm&Gt, October 1, 1996: JP1996-252826

PROBLEM TO BE SOLVED: To provide a novel method for producing a mold from a resin model having the shape of a constitutional part to be produced and not casting the constitutional part using this mold but directly producing the constitutional part from the resin model. SOLUTION: A resin model 22 for ...


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Hlavaty David Gerard, Ashtiani Zarandi Mansour: Manufacture of electrode for electric discharge machining. General Motors Corp &Lt Gm&Gt, November 5, 1996: JP1996-290331

PROBLEM TO BE SOLVED: To rapidly manufacture an electrode for electric discharge machining by preparing a cured resin model with cavities for draining uncured resin, infiltrating a mixture of carbon and resin into the cavities, and curing it. SOLUTION: Suitable curable material 32 such as a mixture ...


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Ashida Kaneyoshi, Ashtiani Zarandi Mansour: Self-reinforcing polyurethane composition. General Motors Corp &Lt Gm&Gt, August 17, 1992: JP1992-226523

PURPOSE: To provide an LCP reinforced polyurethane RIM material capable of being easily processed by reaction-injection molding process. CONSTITUTION: This liquid crystal polymer reinforced polyurethane RIM compsn. having excellent impact strength and flexural modulus is obtained by a reaction- inje ...