Apparatus for extruding concrete

Details Apparatus for extruding concrete Apparatus for extruding concrete

1974-12-19

1976-11-30

Baldwin, Robert D.

Plastic article or earthenware shaping or treating: apparatus

Building forms or construction engineering type mold with...

Including mold charging means

425113, 425315, 425432, B28B 108

Patent

active

039946398

ABSTRACT:
Apparatus for forming concrete articles in which augers convey "no-slump" concrete mix to a molding station with sufficient force to consolidate the mix. Friction is reduced at form surfaces of the molding station by high frequency vibration, greater than 22,000 vibrations per minute. Core-forming mandrels are disposed axially lateral of the line of flight of the augers. The concrete can be prestressed utilizing pre-tensioning or post-tensioning mechanisms and provision is made for transverse reinforcement of the concrete.

REFERENCES:
patent: 1632317 (1927-06-01), Schlegel
patent: 2937429 (1960-05-01), Livingston
patent: 3137220 (1964-06-01), Smith
patent: 3143781 (1964-08-01), Kalns
patent: 3224064 (1965-12-01), Hummel et al.
patent: 3334559 (1967-08-01), Taylor
patent: 3401438 (1968-09-01), Dennis
patent: 3468001 (1969-09-01), Bodine, Jr.
patent: 3529331 (1970-09-01), Putin
patent: 3566490 (1971-03-01), Nagy
patent: 3608012 (1971-09-01), Jonell et al.
patent: 3647308 (1972-03-01), Yost

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