Chem-Tronics, Inc.

Hi-Tech Welding and Forming, Inc.

Hi-Tech Welding Services, Inc.

John Charles Monsees

Donald Owen Nelepovitz

Leo Lawrence Magee

Stephen Michael Dowell

A bi-material die apparatus for high temperature forming of metal parts has at least two opposing die segments having inner surfaces together forming a hollow mold chamber for receiving a mold blank between the die segments. The die segments are of a first material having a first coefficient of thermal expansion CTE. At least one insert of a second material is associated with the inner surface of at least one of the die segments so as to project into the mold chamber, the second material having a second coefficient of thermal expansion CTEhigher than CTEand higher than the coefficient of thermal expansion of the metal product to be formed in the cavity.

Die apparatus and method for high temperature forming of metal products

A die apparatus for forming a high strength metal article under elevated temperature and pressure has at least two opposing die segments together forming a hollow mold chamber for receiving a mold blank between the die segments, the mold chamber having a radial central plane transverse to the longitudinal axis. Each die segment has a plurality of ribs or indents, each rib or indent having a first side facing the central plane and a second side facing away from the central plane. At least the majority of the ribs or indents are of non-uniform shape and have a first and second side at a different angle relative to the central plane, the angle of the second side being greater than the angle of the first side such that the second side is directed generally towards the center of the mold cavity. With this arrangement, when a metal article is molded in the cavity, it will tend to shrink towards the center of the cavity as it cools, in a direction generally along the second sides of the ribs or indents, reducing force acting directly into the ribs or indents.

A structural panel having superior insulating properties which comprises a sheet of polyimide foam material having a metal layer on at least one surface, the metal layer being diffused into the foam structure, providing a superior metal-to-foam bond. The polyimide foam has excellent insulating and structural properties and is highly resistant to high temperatures and open flames. The metal layer adds considerable structural strength, since the diffusion of metal into the foam produces a three-dimensional metal structure rather than the usual planar surface film. The metal layer is applied to the foam sheet by chemical vapor deposition under conditions which improve the diffusion of the metal into the foam.

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El Cajon, CA, United States of America

John Charles Monsees