B - Operations – Transporting – 28 – B
Patent
B - Operations, Transporting
28
B
B28B 21/14 (2006.01) B28B 21/26 (2006.01) B28B 21/28 (2006.01)
Patent
CA 2108675
2108675 9218309 PCTABS00016 A machine serves to cast pipes of concrete or a similar material substantially vertically. The machine comprises an inner mould part (2) and an outer mould part (12). These mould parts are displaced axially with respect to each other during the casting process. A vibrator is preferably provided upwardly in the inner mould part (2), and an axially journalled distributor wheel (1) is rotatably mounted on the top of said mould part (2), said distributor wheel (1) having a plurality of blades (4) for distributing the material in the ring gap between the two mould parts (2, 12). The distributor wheel (1) and its mount are constructed so stiffly that the vibrations generated by the vibrator are transmitted to the material through the blades of the wheel. This ensures, when a firm profile ring is used for the casting of the spigot end, that the area of difficult access below said ring is filled completely with concrete, and that the concrete obtains the prescribed quality. It is hereby possible to cast pipes which have very narrow longitudinal tolerances and also spigot ends which fully satisfy the requirements made of shape and quality.
Fetherstonhaugh & Co.
Pedershaab A/s
LandOfFree
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