| 摘要 |
PROBLEM TO BE SOLVED: To keep the oxygen concentration in a mixer not higher than an ignition limit even if a material to be kneaded is charged or the kneaded material is discharged when kneading the material to be kneaded, in a mixer such as a Bunbury mixer. SOLUTION: A mixer body 1, which has a kneading room 2 for kneading the material to be kneaded, an inlet door 4 for throwing the material to be kneaded into the kneading room 2, and an outlet door 5 for discharging the material to be kneaded from the kneading room, has a sealing room 7 for air-tightly covering the inlet door 4, and an inert-gas introduction pipe 11, 16 for supplying an inert gas into anyone of the sealing room 7 or the kneading room 2. An inlet of the sealing room 7 has preferably a curtain 8. Then, an oxygen concentration meter 9 for measuring the oxygen concentration in the kneading room is arranged and a flow-rate control part 10 for controlling an flow rate of an inert gas to be supplied into the inert-gas introduction pipe based on an oxygen concentration signal from the oxygen concentration meter may be arranged. COPYRIGHT: (C)2009,JPO&INPIT
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