Forming of fiber assembly
The present invention provides a method for forming a fiber assembly by air blowing, enabling the fiber assembly to be fed continuously into a mold cavity even without the need of weighting it in advance, also enabling it to be uniformly packed into the cavity. In this method for forming a fiber assembly, designed to pack a mold cavity with the opened fiber assembly accompanying air to subject it to thermoforming after preparing the fiber assembly by blending a matrix of crimped staples of synthetic fiber with binder fibers lower in melting point that the staples, the pressure change of the air flow accompanied in packing the fiber assembly into the cavity as the packing advances is detected by pressure gauges; at a point when the pressure change comes to a level indicating completion of the packing, the packing operation is halted.