Casting machine for concrete paving stones etc has a mold box rigidly clamped to the vibrating table with structured vibration frequencies for low noise emissions and reduced energy consumption

摘要

The assembly to form shaped bodies of granular materials, such as wet concrete, applies pressure and vibration to the material in the molding zones (106) of mold boxes. The mold box (106) is rigidly clamped to the vibrating table (124) to give a harmonic vibrating action with the mass weight spring system, with a vibrating frequency which is at least partially within the range of the resonance frequency of the mass weight spring system. The main system spring (970) is a hydraulic spring with a compressible fluid vol. (906). Separate units generate the excitation forces (980) and the spring force of the main system spring (970). The force flow paths are at least partially separated for the excitation and spring forces.