FIELD: air removal equipment. SUBSTANCE: extruder has sealing device mounted at side adjacent to inlet opening of cylinder 1 on piston 2 or its stem for pressing to cylinder during movement of piston in cylinder to outlet opening. Sealing device is made in the form of casing with sealing rings and is provided with magnets connected with cylinder. Air removal bore is made in cylinder wall in inclined position relative to cylinder vertical axis at side adjacent to inlet opening. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 5 cl, 1 dwg
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