Wehr Corporation

Hideo Okunami

Robert J Dorsey

William T Savage

Gary R Long

A hydraulic press for refractory material including a mold box rigidly supported by a press frame. A lower plunger assembly positioned below the mold box and includes a lower crosshead and at least one plunger adapted to extend upwardly into a vertical mold cavity in the mold box. An ejection cylinder assembly supported by the press crown is provided for causing selective vertical movement of the lower crosshead. An upper plunger assembly is positioned above the mold box and includes an upper crosshead and at least one upper plunger supported by the crosshead and adapted to extend downwardly into the mold cavity. A hydraulic cylinder is provided for supporting the upper crosshead for vertical movement with respect to the mold box and the lower crosshead. The hydraulic cylinder is fixedly connected to the lower crosshead, and a ram is housed in the cylinder and adapted to selectively drive the upper crosshead downwardly.

Hydraulic refractory press including floating upper and lower plunger

The invention includes apparatus for use in molding refractory material and is useful, for example, in molding bricks and other similar products. The apparatus includes a mold table supported by a plurality of vertical columns, the mold table being supported for translational movement on the columns. The apparatus further includes a mold box supported by the mold table, the mold box including at least one vertical mold cavity having opposite open ends. The apparatus also includes a plunger assembly supported below the mold and including at least one plunger having an end received in the mold cavity. A plunger assembly is also supported above the mold and includes at least one plunger receivable in the mold cavity, the plungers of the opposed plunger assemblies being functional to compress refractory material placed in the mold. To facilitate adjustment of the thickness of the molded products, the plungers are supported by a plurality of readily removable shims, variation of the number and thickness of the shims being functional to modify the relative positions of the plungers.

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Chicago, IL, United States of America

Hideo Okunami