| 摘要 |
PURPOSE:To produce preexpanded particles, uniformly coated with a very small amount of a treating agent and hardly causing bridging, by atomizing a treating agent with a pressurized air for feeding preexpanded particles through a duct to a silo and bringing the atomized treating agent into contact with the preexpanded particles. CONSTITUTION:Resin particles are fed from a raw material hopper 1 to a preexpanding machine 3 by a screw feeder 2 and preexpanded particles are fed through an outlet 5 of a preexpanding tank 4 and hopper 6, passed through a pneumatic feeding duct 7 and pneumatically fed to an aging silo 8 while suspensed with a pressurized gas supplied from a particle feeding blower 9. In the stage, a spray nozzle 22 is placed in the interior of the pneumatic feeding duct 7 to atomize the treating agent emerging from the spray nozzle 22 with the pressurizing gas from the particle feeding blower 9 to coat the preexpanded particles with the treating agent in the flow of the atomized treating agent. |
