| 摘要 |
PURPOSE:To reduce a material loss at the time of a change of the material by mixing evenly the material whose viscosity is high and making the change of the material in a short period of time, by specifying the shape of each cavity and an arrangement state of each cavity row. CONSTITUTION:Each of cavities 4, 5 is made into an oval shape and a longitudinal direction of each of the cavities 4, 5 is made into an inclined state against a shaft center direction (Y-Y). The cavities 4, 5 are arranged dense by shifting each of cavity rows 6, 7 of each of cavity groups 8, 9 in a circumferential direction (X-X) against the adjoining cavity rows 6, 7. The cavity rows 6, 7 of the cavity groups 8, 9 corresponding to each of a pair of the cavity rows 6, 7 of each of the cavity groups 8, 9 on the other side adjoining to each other are made to overlap mutually in relation to the axial direction (Y-Y). |
