Method and device for the casting of concrete products
AssigneeOy Partek AB
InventorIlmari Paakkinen
Life of this patent
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Abstract
Method and device for the casting of concrete products either by means of a periodic method or by means of a continuous slide casting method. Into the product, one or several cavities are formed by means of a cavity mandrel (4). The mix is compacted by rotating the cavity mandrel (4) back and forth around its longitudinal axis.
Claims18
A method of casting concrete products having at least one longitudinal cavity, said method comprising the steps of:
- forming the product with said longitudinal cavity by passing a pressurized concrete mix by a cavity mandrel;
- providing said cavity mandrel with a non-circular cross-sectional shape;
- and
- during said forming step, compacting the pressurized concrete mix by rotating the non-circular cavity mandrel back and forth about its longitudinal axis by a turning angle of rotation not greater than 180.degree..
A device for casting of a concrete product from a concrete mix either by a periodic method or by a continuous slide casting method, said device comprising a bottom plane, side walls, at least one cavity mandrel adapted to form a cavity in the product and means for compacting the concrete mix, said compacting means including means for rotating said cavity mandrel back and forth about its longitudinal axis by a turning angle of rotation not greater than 180.degree. and said cavity mandrel having a non-circular cross-sectional shape, whereby upon rotation of said cavity mandrel said concrete mix is compacted.
Dependencies are inferred from the claim text.