US 4,259,054 AGranted

Brick press frame having prestressed columns

AssigneeWehr Corporation

InventorWilliam T. Savage

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Abstract

A press is provided for forming articles from compressed refractory material such as bricks, the press including a press bed, a crown spaced from the press bed, and a plurality of prestressed support columns rigidly supporting the press bed and the crown in spaced apart relation. The support columns each include a central tie rod including one end extending through a portion of the press bed and including another end extending through a portion of the crown and rigidly engaging the crown. The support columns also include an outer hollow cylindrical member surrounding the tie rods, one end of each of the hollow cylindrical members being positioned against the upper surface of the bed and the opposite end of each of the hollow cylindrical members engaging a lower portion of the crown. The tie rods are subjected to a tensile force while the outer cylindrical members are simultaneously subjected to a compressive force thereby providing a rigid frame structure and one resistive to twisting. The outer cylindrical members also function to provide supporting columns for a mold table and provide for slidable movement of the mold table between the bed and the yoke. The outer cylindrical members also provide for slidable support of a movable crosshead and facilitate movement of the crosshead toward and away from the mold table.

Claims17

Dependent claims

A press for forming articles from compressed refractory material, the press comprising:

a press bed,
a crown spaced from said press bed,
means for supporting said press bed and said crown in spaced apart relation, said supporting means including a plurality of tie rods, each of said tie rods having opposite ends, one of said opposite ends extending through at least a portion of said bed and engaging said bed, and the other of said opposite ends extending through at least a portion of said crown and engaging said crown, each of said tie rods being surrounded by an elongated hollow member, said elongated hollow members each including opposite ends, one of said opposite ends being positioned adjacent said bed and the other of said opposite hollow member ends being positioned adjacent said crown, a mold supported by said hollow members between said bed and said crown, said mold including a mold cavity for supporting refractory material therein,
a press member supported for movement between a first position and a position wherein said press member compresses refractory material in said mold cavity,
means for selectively forcing said press member into compressing engagement with the refractory material in said mold cavity, said means for forcing applying a torque on said crown when said press member compresses the refractory material, and
means for subjecting said tie rods to tensile stress and for subjecting said hollow members to compressive stress and for causing said tie rods and said columns to resist twisting of said crown with respect to said bed when said press member compresses the refractory material in said mold cavity.

3 more elements

A press for forming articles from compressed refractory material, the press comprising:

a press bed including an upper surface and a lower surface,
a crown spaced from said press bed and including an upper surface and a lower surface,
means for supporting said press bed and said crown in spaced apart relation, said supporting means including a plurality of tie rods, one of said opposite ends extending through at least a portion of said bed and engaging said bed, and the other of said opposite ends extending through at least a portion of said crown and engaging said crown, and elongated hollow cylindrical members surrounding said tie rods and compressed between said crown lower surface and said bed upper surface,
a mold supported between said bed and said crown and having at least one cavity for supporting refractory material to be compressed,
at least one press member supported for movement from a first position to a refractory material compressing position,
means for selectively forcing said press member into compressing engagement with the refractory material in said mold cavity, said means for forcing said press member applying a twisting torque on said crown with respect to said press bed when said press member compresses the refractory material, and
means for subjecting said tie rods to tensile stress and for subjecting said hollow cylindrical members to a compressive stress whereby said tie rods and said columns resist twisting of said crown with respect to said bed when said press member compresses the refractory material.

4 more elements

Dependencies are inferred from the claim text.