Claims
- 1. Apparatus for forming concrete articles, comprising:
- a molding station including form surfaces;
- walls defining a conveyor station including at least one auger for conveying concrete mix into said molding station, said auger having flights for extruding said mix;
- at least one core forming mandrel disposed in said molding station and formed by walls having external surfaces in the path of extrusion from said auger flights;
- said auger being rotationally independent from said mandrel;
- said auger and said mandrel being relatively disposed so that the longitudinal axis of said auger is lateral of the longitudinal axis of said mandrel;
- means associated with said conveyor station for introducing concrete mix to said auger;
- means associated with said auger for rotating said auger to convey said mix to the form surfaces of said molding station with sufficient force to form and extrude a consolidated mix relative to said form surfaces;
- means associated with said form surfaces for vibrating said form surfaces at a frequency greater than 22,000 vibrations per minute, while extruding said consolidated mix, to reduce friction between said form surfaces and said consolidated mix;
- said form surfaces overlapping said conveyor station walls, and including means at the region of overlap of said form surfaces and said conveyor station walls for inserting reinforcement members into and transverse of said concrete mix and for moving said reinforcement members at extrusion speed through at least an initial region of said molding station for consolidation with said mix.
Parent Case Info
This is a division of application Ser. No. 534,263, filed Dec. 19, 1974, now U.S. Pat. No. 3,994,639, which in turn is a division of application Ser. No. 322,811, filed Jan. 11, 1973, now U.S. Pat. No. 3,926,541, which in turn is a continuation-in-part of application Ser. No. 50,491, filed June 29, 1970, now abandoned.
US Referenced Citations (4)
Divisions (2)
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Number |
Date |
Country |
Parent |
534263 |
Dec 1974 |
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Parent |
322811 |
Jan 1973 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
50491 |
Jun 1970 |
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