| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a vibration sieving machine of a simple structure, capable of dispersing a powder widely to an effective area of a sieving mesh and thus efficiently treating the powder in a short time. <P>SOLUTION: The sieving machine includes a sieve 2, a plurality of vibration exciters 3 including a piezoelectric element for vibrating the sieve, and a controller 5 for controlling each vibration exciter 3. The vibration exciters 3 are installed respectively at circumferentially different positions on a sieve frame 6. Each exciter 3 is simultaneously driven to sieve the powder put on the sieving mesh 7 while controlling the frequency, phase, amplitude, waveform and duty ratio of vibration by the controller 5. <P>COPYRIGHT: (C)2012,JPO&INPIT |
