Method of removing volatile matters from vent arrangement

Details Method of removing volatile matters from vent arrangement Method of removing volatile matters from vent arrangement

B - Operations, Transporting

29

B

B29B 7/84 (2006.01) B29B 13/06 (2006.01) B29C 45/63 (2006.01) B29C 47/76 (2006.01)

Patent

CA 2178896

In a vent arrangement comprising a heating cylinder 1 containing therein a screw and provided with a vent hole 3 and a reduced pressure exhaust path 4 provided with a vacuum pump and connected to the vent hole 3 for draining volatile fractions of a material to be molded from the heating cylinder by reducing the pressure in the vent hole by means of the vacuum pump, said volatile fractions are removed by arranging in the exhaust path a filter unit 7 filled with a granular filtering material 8. The material to be molded is used for the filtering material 8. According to the above construction, it can be achieved to efficiently remove volatile matters by using the molded material as the filtering material of the filter unit arranged in the reduced pressure exhaust path of a vent arrangement.

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