Biaxial concrete masonry casting method

Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Positioning of a mold part to form a cavity or controlling...

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264318, 264333, 264334, B28B 710, B28B 720, B28B 1306

Patent

active

049099701

ABSTRACT:
Methods for biaxially (or triaxially) casting concrete masonry ("CM") products like CM blocks which have twin cavities formed by a pair of face shells and three webs interconnecting same with the twin cavities extending in the direction of the axis of casting of the CM block include using in the mold cavity one or more main mold cores which incorporate structure for extending and retracting a plunger or the like to provide one or more temporary mold cores laterally extending into the mold cavity from one or more main mold cores along a second axis which is normal to the axis of casting during certain selected phases of the CM casting process so as to form openings extending through one or more webs in the direction of the second axis.

REFERENCES:
patent: 1202038 (1916-10-01), Eastman
patent: 1321938 (1919-11-01), Norton
patent: 1548485 (1925-08-01), Quimby
patent: 1623560 (1927-04-01), Sherman
patent: 2567549 (1951-09-01), Christensen
patent: 3415482 (1968-12-01), Schmidgall
patent: 3418767 (1968-12-01), Seeger
patent: 3497174 (1970-02-01), Nayagam
patent: 3952991 (1976-04-01), Schneider
patent: 4274824 (1981-06-01), Mullins
patent: 4614326 (1986-09-01), Strickland et al.

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