Automatic screen changer device

An automatic screen changer device for the manufacturing, processing, recycling, and treatment of thermoplastic materials said device comprising:

• a frame;
• two opposite side plates or shoulders secured to said frame and provided, respectively, with an inlet opening and an outlet opening;
• a pair of stacked screening units, each screening unit comprising:
• a screen,
• an inlet channel and an outlet channel, wherein said inlet channel allows a flow and a screening of molten material in a direction of the outlet channel;
• a screening support or band, said screening support or band adapted for screening of said molten material;
• a first plate placed on an inlet side for the molten material, a second plate placed on an outlet side for the molten material, said first plate and said second plate being restrained one to the other, each of said first and second plates being configured to slide in a longitudinal direction, said first and second plates accommodating said screening support or band therebetween, wherein the first plate comprises a wedge-shaped pocket;
• a movable wedge interposed between the first plate and the second plate, said wedge having a through hole configured to provide passage of the molten material from the inlet channel, said wedge being configured to slide in the longitudinal direction inside the wedge-shaped pocket formed in the first plate;
• wherein said inlet opening is configured to allow the molten material to pass into each of the inlet channels;
• wherein said outlet opening is configured to receive molten material from each of the outlet channels;
• and
• wherein the screening units are configured to be slidingly movable longitudinally with respect to the frame and to the opposite side plates or shoulders and wherein said screening units are further configured to be reciprocally movable with temporary interruption of the flow of molten material through one of said screening units during a screen change.