Wehr Corporation

Gary R Long

Robert J Dorsey

Hideo Okunami

A hydraulic press is provided including a frame having a pair of spaced-apart vertical side members and a crown, and a mold box rigidly supported between the vertical side members and including a vertical mold cavity. A lower plunger assembly is positioned below the mold box and includes at least one plunger adapted to extend upwardly into the mold cavity, and an ejection cylinder assembly is provided for causing selective vertical movement of the lower plunger assembly. An upper plunger assembly is positioned above the mold box and includes an upper plunger adapted to extend downwardly into the mold cavity, and a hydraulic ram is provided for supporting the upper plunger assembly for vertical movement with respect to said mold box and with respect to said lower plunger assembly. The hydraulic ram includes a cylinder fixed to the lower plunger assembly and a ram housed in the cylinder and adapted to selectively drive the upper plunger assembly downwardly. Rack and pinion position encoders are provided for sensing the relative movement of the lower plunger assembly and the upper plunger assembly and for generating electrical signals indicating such relative movement so as to provide accurate control of the size of the compressed refractory product. Pressure transducers are also provided and function to permit control of the compression pressure and the density of the resultant products.

Hydraulic refractory press including product thickness or density

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.

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Bolingbrook, IL, United States of America

Gary R Long