| 摘要 |
PURPOSE:To enable to add a powdery additive uniformly and stably for a long period of time without spoiling quality of a polymer, by a method wherein a supply part which is mounted vertically to a melting and extruding machine and has a cross-sectional shape in a manner wherein an inner wall runs along a locus of the external circumference at the time of turning of a transfer device and an introduction part which runs in parallel with the supply part and is at a downward slope toward the same are provided. CONSTITUTION:A powdery additive discharged quantitatively through a metering hopper 1 drops through a vertical conduit 2 connected through flexible tubes 10, 11, passes through an introduction part 4 having a screw 13 mounted horizontally and supplied quantitatively to a melting and extruding machine 7 through a supply part 6 having a screw 14 mounted vertically. In case when a powdery material which is apt to generate a bridge is added, vibrators 3, 5 are mounted. As for a polymer, after being thrown into through a supply port 8 and kneaded sufficiently along with an additive through the molding and extruding machine 7, it is discharged through an outlet 9. As a twin-screw cleans mutual blades while the same is being turned in the supply part and introduction part, the same is favorable for the powdery material whose adhesion is remarkable. |
