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EPC producers find new applications.

Four of this year's technical sessions concentrated on the opportunities offered by the expendable pattern casting method.

One session, a panel presentation on The EPC Development of an Aluminum Two Cycle Engine Block' (91-122), followed the EPC process from the design stage throughout manufacturing to the final casting. S. Habek, Brunswick Marine Power, discussed the design issues involved in choosing EPC over conventional casting techniques. "EPC offered the ability to combine several castings into one. Tooling costs were cut in half. Machining costs were reduced by 3%, and assembly times were cut 30%." Foam molding and assembly of the engine block patterns was highlighted by L. Crabtree, Foseco/Morval. He told of the adaptation of the primarily aluminum diecasting facility into an EPC foundry, complete with computer-controlled ladies. Teamwork between the designers, engineers and vendors all proved vital to the success of this project. Once the program was in the production stage, other areas such as leak testing, coating application and removal and tooling materials were investigated, according to T. Holmgren Brunswick.

D. Hoyt and P. Dziekonski, Wedron Silica Co., focused on "Sand Properties and Their Relationship to Compaction for the EPC Process" (91-031). Hoyt explained that the sands used for EPC are different from conventional sands. "You worry about different transitions with the EPC process," he said as he reviewed suggested sand properties that are necessary to produce a quality EPC casting. Dziekonski discussed the effects of grain shape on during the compaction of EPC molds. "Certain shaped grains work better with the EPC method. They tend to flow and compact easier," he said.
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Title Annotation:95th AFS Casting Congress, May 5-9, 1991 - Birmingham, Alabama; A Technical Review: Expendable Pattern Casting Division
Publication:Modern Casting
Date:Jun 1, 1991
Previous Article:Research keeps foundries competitive.
Next Article:Discussions emphasize practical information.

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