| 摘要 |
PURPOSE:To miniaturize a mixing apparatus with a piston change-over mechanism, in injecting resin components into a mold while injecting the same in a mixing chamber under high pressure to collide and mix the same to each other, by enabling the cleaning of the return flowlines of the resin components when mixing is stopped. CONSTITUTION:When a piston 30 is retracted, inflow ports 11, 12 of resin components are opened and the resin components are injected into a mixing chamber to be countercurrently mixed while the resulting mixture is emitted from an emitting port 15. On the other hand, when the piston 30 advances, the component mixture in the mixing chamber 10 and the components remaining in the recessd grooves 21, 22 are discharged from the emitting port 15 and, with the movement of protruded parts 31, 33, the recessed grooves 21, 22 are sealed so as to communicate the respective inflow port and the outflow port with ports 11, 13 and 12, 14 to introduce the resin components flowed into the inflow ports 11, 12 and into the outflow ports 13, 14 through return flowlines and, subsequently, to return and recirculate the same to component tanks. |
