Method and apparatus for casting a concrete product
AssigneeConsolis Technology Oy Ab
InventorsLassi Antero Jarvinen, Aimo Tapio Seppanen
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Abstract
A method and apparatus are disclosed for fabricating a concrete product in a slip-form casting process, in which method concrete mix is fed into slip-form mold of a defined cross section moving progressevely in the casting process so as to obtain a concrete product of a desired shape. The method is characterized by an interruptible guidance control of the prestressing tendons so as to allow the tendon guides to travel past supplementary parts such as reinforcing steels connected to the prestressing tendons.
Claims5
A method for fabricating a concrete product in a substantially horizontal slip-form casting process, in which method concrete mix is forced into a slip-form mold of a defined cross section moving progressively in the casting process so as to obtain a concrete product of a desired shape, said concrete product including prestressing tendons running in the longitudinal casting direction of the product and further including transverse reinforcing steels or other supplementary parts connected to said prestressing tendons, characterized in that
- said prestressing tendon is guided by at least two different points in the casting direction in such a fashion that, with the progress of the casting run so far as to reach a supplementary part connected to said prestressing tendons, a leading tendon guide is driven free from guiding a tendon for such a time that allows said leading tendon guide to travel past the supplementary part connected to the tendons and, respectively,
- with the progress of the casting run so far as to have said leading tendon guide passed the location of said supplementary part connected to said prestressing tendons and the casting run further proceeding so far as to have a trailing tendon guide meeting said supplementary part, said trailing tendon guide is driven free from guiding a tendon for such a time that allows said trailing tendon guide to travel past the supplementary part connected to the tendons,
- however having during the entire casting run at least one tendon guide at all times guiding said tendon.
Apparatus for fabricating a concrete product, the apparatus comprising at least one feed means for feeding a concrete mix into a mold of defined cross section, said feed means being adapted to perform a movement for compacting the concrete mix, further comprising drive means for moving said feed means and means for guiding a prestressing tendon, characterized in that said tendon guide means are adapted to guide said tendon by at least two points in longitudinal casting direction and that said tendon guide means are equipped with means for interrupting the controlled tendon guidance for a desired time interval at a desired instant during the casting process.
Dependencies are inferred from the claim text.