| 摘要 |
<p>An automatic screen changer device , especially suitable for being used on systems and equipments for the manufacturing, processing, recycling and treatment of thermoplastic materials, is placed downstream of an extruder device and comprises a frame, two opposite side plates or shoulders (14, 16) secured to said frame and provided, respectively, with an inlet opening and a pair of inlet channels (30), with an outlet opening and with a pair of outlet channels (32), said inlet channels (30) suitable for allowing a flow and a screening of contaminated molten material in the direction of the outlet channels (32) through a pair of stacked screening units (13'); the device likewise comprises movable sealing and locking/unlocking means (36) of a screening support or band (42) for the screening of said molten material in each screening unit (13') with the latter movable reciprocally with temporary interruption of the flow of molten material through one of said same screening units during the screen change.</p> |
