COLLECTION AND DEPOSITION OF CHOPPED FIBROUS STRANDS FOR FORMATION INTO NON-WOVEN WEBS OF BONDED CHOPPED FIBERS

摘要

PURPOSE: A device for collecting and depositing is provided to collect chopped fibers from a fiber supplying source and to deposit the chopped fibers to be treated to a non-woven web of the bonded chopped fibers being called as chopped strand mat. CONSTITUTION: An air cannon (100), formed by associating an inlet cone (116), an air amplifier (104) and an outlet core (124) with one another, receives chopped fibers and forcefully deposits the chopped fibers on a collection surface (102) or web moving beyond an outlet end (126) of the outlet core (124). A binder is applied to the resulting mat (172) of chopped fibers, the binder is activated by the application of energy with the resulting treated mat (182)being compacted, cooled and rolled up to form a chopped strand mat package(194). For wide mats, one or more banks (130) of air cannons (100) extend across the moving collection web. The air cannons (100) of each bank (130) are alternately directed up-line and down-line of the web to reduce interference between the air cannons (100) by means of L-shaped support rods (136)which have generally horizontal and generally vertical legs (136H, 136V) which are separated from one another by acute and obtuse angles (140, 142) for up-line and down-line direction, respectively. The air cannons (100) can also be individually adjusted to vary the aimed direction of the air cannons (100) across the web by rotation of the generally horizontal legs (136H)of the L-shaped support rods (136). The air cannons (100) forcefully direct chopped fibers to the web to overcome air turbulence within a forming hood (170) and forces due to static electricity.