United Technologies Corporation

Lea D Kennard

Carl R Verner

John Joseph Marcin

Stephen Douglas Murray

Steven J Bullied

Reade R Clemens

Michael K Turkington

Maria Arceo Herring

Richard L Ritchie

James Thompson Beals

Mario P Bochiechio

Mark F Bartholomew

John J Marcin

Delwyn E Norton

Donald D Schofield

Joshua E Persky

Jacob A Snyder

Timothy P Hasselberg

Dawn D Mandich

P Brennan Reilly

Stephen D Murray

A method of forming a gating fixture for a lost wax casting process includes determining an optimal orientation of a gate in relation to a part, and forming a fixture that can repeatably be used to consistently locate the gate relative to the part. In one example, stereolithography is used to form the fixture.

Lost wax investment casting gating fixtures

In an investment casting process, a composite core is formed as a combination of ceramic casting core element and a non-ceramic casting core element. The core is heated in an oxidative atmosphere and then heated in a non-oxidative atmosphere.

Method for firing a ceramic and refractory metal casting core

An apparatus for shelling an investment casting pattern has a tank containing a coating material. There are means for holding the pattern immersed in the coating material. There may be means for vibrating the pattern during immersion of the pattern and a vacuum source coupled to the tank to withdraw air from at least one headspace of the tank.

Shelling apparatus and methods for investment casting

An at least two step heating process is used to strengthen the shell of an investment casting mold including a refractory metal core. The first stage may occur under otherwise oxidizing conditions at a low enough temperature to avoid substantial core oxidation. The second stage may occur under essentially non-oxidizing conditions at a higher temperature.

Methods for manufacturing investment casting shells

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Manchester, CT, United States of America

Lea D Kennard