| 摘要 |
This invention relates to jolting tables for manufacturing structural members from concrete. Such tables normally comprise a vibratory plate on a support structure which is used as a mould base for the member and a jolter is mounted below this plate. In accordance with the invention, the support structure is rigid and the plate is freely mounted thereon without resilient cushioning in such a fashion that it may be laterally displaceable within predetermined limits: the jolter is movable along a jolting rail that extends substantially over the whole length of the plate, said rail being secured directly to the inside of the plate. The support structure is rigidly connected to a base member which may be a prepared slab of concrete or the ground. The support framework may be made from steel or wooden members. |
