Gm Global Technolgoy Operations, Inc.

William Thomas Whited

June-Sang Siak

Richard M Schreck

Mark Allen Datte

Mei Cai

Gordon Alwin Tooley

Scott William Biederman

A method for making sand particle foundry mold members. Sand particles are coated with an aqueous dispersion of a suitable binder material such as a gelatin gel. The moist gelatin coated particles are gravity fed into a pattern box for the mold member and subjected to multi-axis vibration to pack the sand in the pattern box. The moist sand is then heated with radio frequency energy to promote binder flow to the corners of the particles, and air flow is initiated to transport water from the mass of particles to harden the mass of particles into the mold member.

Method of sand coremaking

A foundry mold member made from a plurality of sand particles bound together with a binder which is concentrated at the contact points between contiguous sand particles and consists essentially of gelatins having a Bloom rating less than about 175 Bloom grams. The sand particles are first coated with a sol of the gelatin, cooled to ambient temperature and conditioned to a prescribed water content necessary to effect migration of the gelatin to the interparticle contact points upon heating of the coated particles in a pattern mold.

Sand mold member and method

Refractory coated gelatin-bonded foundry sand core made by waterproofing the surface of the core and immersing the waterproofed core in an aqueous refractory suspension to deposit the refractory.

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Saginaw, MI, United States of America

William Thomas Whited