Control the flowrate of the aluminium, change its flow direction and with the filter function combined bag.
It has complex structure of this combination bag. This bag can filtrate the molten metal that is being poured through
a spout, and to distribute it all over the mold surface. It consists of a rectangular box with an open top made of an
open-weave glass fiber fabric. The size of the openings of the fabric can vary depending on the weave construction and
the type of yarns used.