| 摘要 |
PURPOSE:To enable to make a material into a uniform product at a predetermined mixture ratio even if a plastic main material and an additive such as a processed pigment are fed separately from each other, by a method wherein a plurality of pieces of hoppers throwing a plastic molding material into a cylinder is provided on a rear end part of the cylinder and a controlling device of a feed quantity of the material to the cylinder is provided under each of the hoppers. CONSTITUTION:A processed pigment 28 is dropped into a cylinder 1 by passing through a feed path 8 from a rear hopper 6 and advanced according to a revolution of a screw 2. Then a plastic main material 27 is dropped into the cylinder 1 by passing through the feed path 7 from a front hopper 5 and met with the processed pigment 28. As a ratio between the main material 27 and processed pigment 28 at the time of this meeting has been decided through feed devices 9, 10, they are mixed evenly at the ratio at a feed parts S1 through agitation action of the screw 2. As plasticization progresses gradually through influence of a heater 3 according as a flow of the material advances, unification is progressed further at a compression part S2 under a fusion state and a uniform plastic material having no dispersion on its tone of a color is injected. |
