Ameron, Inc.

William A Muller

James F O'Conner

Gregory A Hart

Truett Tyler

Michael G Grabowski

A stripping station which is used for stripping a mold from a cast concrete lamp pole has a mold that has an axial compressive load placed thereon by a tension force applied to tension members running through the mold. The tension members are secured to anchors located at one end of the mold. A stripping fixture attached to the anchors exerts a tension force sufficient to relieve the axial compressive load on the mold and transfers the axial load to the frame of the stripping machine. This allows the mold to be removed. The axial compression load is transferred to the pole after the mold is stripped.

Mold stripping equipment for manufacture of prestressed concrete poles

A compound fluted mold segment for casting prestressed concrete lamp poles includes three 120.degree. circumferential sectors wherein each sector contains a mold form made of a thin gauge sheet metal in which are locaed flutes formed by a press-brake operation. A plurality of circumferential flanges are welded on the outside of the sheet meal for stiffening the mold form. Longitudinal gates extend radially outwardly from each edge of the circumferential sectors for connecting the sectors and stiffening the mold segment in a longitudinal direction. Mating annular shoulders are incorporated to maintain concentricity between the fluted mold segment and additional mold segments attached at the ends of the fluted segment.

Compound fluted mold for casting prestressed concrete lamp poles

A welded tapered tube is made by deforming a flat, elongated trapezoidal sheet of metal into an elongated, U-shaped trough in a wagon open at its top and having a U-shaped trough for a bottom. The wagon moves along a track to carry the U-shaped sheet past a series of fin rolls, which deform the U-shaped sheet into an oval-shaped, tapered tube with a seam running the length of the tube. The wagon and tube thereafter move past a welding station where the seam is forged and welded together to form an elongated, tapered tube with an oval-shaped cross section, which may be squeezed between two elongated and semicircular die cavities to form a tapered tube of circular cross section.

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Fillmore, CA, United States of America

William A Muller