Hpm Corporation

Koehring Company

Gary L Myers

Donald W Staiger

Don R Jagger

An apparatus and method for making hollow shell cores wherein a core box assembly is provided including a vented pattern. Baffles are provided in the core box in the space between the pattern and the core box walls whereby a catalyst gas flowing into the core box through an entry port will be caused to enter the pattern and to flow along the outer layer of a sand and binder change in the pattern. The gas will then be caused to flow out of the pattern into a trapped gas vent and out of an outlet port of the core box. The continuous flow of catalyst gas through only the outside layer of the sand and binder charge in the pattern will only cause the outer layer of the charge to be cured and to form a hardened shell. After formation of the shell, the uncured sand and binder mixture in the shell will be discharged and reused. The shell is then transferred from the core box assembly.

Method and apparatus for making hollow sheel cores with controlled gas

Access to mold halves disposed on and between opposed stationary and movable platens of a molding machine is facilitated by releasing and at least partially retracting, from the zone between the platens, at least one of a plurality of tie rods extending therebetween. A tie rod is at least partially removed by (1) slidingly translating the movable platen along the tie rods toward the stationary platen, (2) releasing one tie rod from connection with the stationary platen and connecting it to the movable platen, and then (3) slidingly translating the movable platen away from the stationary platen along tie rods remaining connected thereto, to at least partially retract the released tie rod from between the stationary and movable platens.

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Mount Gilead, OH, United States of America

Gary L Myers