在料槽（16）喷射的纤维的制造结合的矿物纤维棉粘合剂的，由此纤维的倾向粘附到料槽（16）和结块的形成的壁由于时间的推移是可固化粘合剂。 为了避免这样的结块，这可能会导致生产损失，斜槽为双层壁，并通过在内壁与外壁部分（29 28）之间的空腔（30）的冷却液的引导形成的周向壁（18，20）被冷却。 已经令人惊讶地发现，结果无法固体结块也出现过很长一段时间了，因为暂时秉承纤维缺乏粘结剂固化实际上可以粘在低温下不知道，但是从墙上不断脱落。 与此相反的轴壁的连续清洗中的三个壁不仅这种投资和维护或避免不可预料的工厂停产的大量费用，而且外围壁的一个尺寸精确的密封件（18，20）的槽的形式（16）为止， 既不纤维损失也不是假的空气在被吸入。

In the production of bonded mineral fiber wool binder in the chute (16) to the fibers sprayed, whereby there is a tendency of the fibers to adhere to the walls of the chute (16) and to the formation of cakings due to curing over time binder. To avoid such caking, which can lead to production stoppages, the peripheral walls (18, 20) of the chute formed as double walls and by directing cooling fluid in the cavity (30) between the inner and outer wall parts (28, 29) is cooled. It has surprisingly been found that in this way can no solid caking also occur over a long period, since temporarily adhering fibers lack curing of the binder nich can actually stick at low temperatures, but will be continuously released from the wall. In contrast to the continuous cleaning of the shaft walls in the form of rotating walls not only of the substantial amount of investment and maintenance purpose or unpredictable plant shutdowns also a dimensionally accurate sealing of the peripheral walls (18, 20) of the chute (16) is avoided, but reached, that neither fiber losses nor false air is sucked.