| 摘要 |
PURPOSE: To reduce delicate dependency of compressing behavior for a characteristic of a material to be compressed and a degree of water addition by terminating the rear area of the compressing part of an extruding screw to the part tapered into a cone equivalent to several times largeness of a thin feed part of the front area of the compressing part and whereby putting the material to be compressed into the discharging area of a sprue. CONSTITUTION: The angle 19 formed by the axis 18 of an extruder screw 3 and the feed surface 17 of the compressing part 5 of the extruder screw 3 is constituted to be larger than 90 degrees, and the radius 20 of a transit part to an extruder screw core part 22 is constituted into a proper angle. A wiping off angle, having the obtuse edge part angle formed by composing a flat and smooth part and a groove part wherein a round surface 21 enlarging in the feed direction and a flat depth are directed in the axial direction, is provided, the narrow part of the sprue is harmonized with an enlarging part 15 connected to it, and whereby a wear resistant and reliable compressing structure having a simple structure for a fibrous material is formed. Therefore, the compressing structure is hardly influenced by the difference of quality of the material to be compressed. |
