DEVICE FOR CHANGING MOUTHPIECE OF EXTRUSION MOLDING MACHINE

摘要

PURPOSE:To permit easy and prompt change of a mouthpiece without removing a push member and using excessive molding material by moving a movable plate with plural freely movable mouthpiece parts in the direction crossing a material passage and arranging one of the mouthpieces selectively on the material passage. CONSTITUTION:Freely movably in the direction crossing the inside 6 and the outside supply passage 8 the movable plate 12 is equipped on the fixed plate 5 through the perforating hole 4 and provided with plural mouthpiece parts 13. The piston 28 of the cylinder 22 is moved downward by the motion of the control valve 26 due to a control signal from the controller 25 to move the movable plate 12 downward in the arrow Y direction. Thereby, the lower mouthpiece 13 cuts melting material in the inside material passages 9, 18 and the outside material passages 10, 19 between the movable spider 17 and the fixed spider 11 and arranged in the projecting form under the fixed plate 5.