Method and apparatus for compacting granular materials

B - Operations – Transporting – 30 – B

Patent

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Details

B30B 11/02 (2006.01) B06B 1/10 (2006.01) B28B 1/08 (2006.01) B28B 3/02 (2006.01) F16F 15/023 (2006.01)

Patent

CA 2428299

The invention relates to a method and device for the compression of granular materials. On compressing granular material to give prepared products e.g. concrete paving slabs, a resonance vibrator with an oscillating mass-spring system is applied, which may be energised by a controllable energiser to produce forced oscillation of a given frequency and oscillatory amplitude. The resonant effect, making use of the proximity of the inherent resonance frequency and the exciter frequency permits a reduction in the size of the exciter force. According to the invention, along with an adjustment of the exciter frequency the resonant frequency is also simultaneously co-adjusted by means of a suitable adjuster, in order to be able to make use of the resonance effect throughout the whole spectrum of the exciter frequencies to be carried out.

L'invention concerne un procédé et un dispositif de compression de matières granuleuses. Pendant la compression de matières granuleuses pour l'obtention de produits finis, tels que des dalles de pavage en béton, un oscillateur à résonance est mis en oeuvre avec un système masse-ressort oscillant. Ce système est activé par un excitateur réglable pour produire des oscillations forcées d'une fréquence et d'une amplitude d'oscillation prédéfinissables. L'effet de résonance, qui utilise la proximité de la fréquence de résonance et de la fréquence d'excitation, permet une réduction de la grandeur de la force d'excitation. L'objectif de la présente invention est de permettre l'utilisation de cet effet de résonance sur toute la largeur d'une plage de fréquence d'excitation à balayer. A cet effet, les fréquences de résonance et d'excitation peuvent être réglées de manière simultanée, au moyen d'un dispositif de réglage correspondant.

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