| 摘要 |
<p>Apparatus for needling nonwovens, comprising a needle board connected to push rods, comprises a push rod drive in the form of a hydrostatic resonance drive comprising pistons (2) acted upon on both sides by hydraulic springs (4, 5) and a device for applying pressure to the pistons at a frequency corresponding to the resonance frequency of the vibrational system comprising the moving masses and the hydraulic springs.</p> |
