| 摘要 |
A pressing device (100) for sanding machines includes a plurality of mobile sectors (1) allowing a sanding mean (30) to fully contact the surface of panel (3). Each mobile sector (1) is independently operated by a respective pneumatic actuator (5) between an operating condition, in correspondence of which it transmits a pressing force to the panel (3) through the sanding mean (30), and a rest condition of said sanding mean (30). The pneumatic acuator (5) is fed by at least a first source of pressured fluid (11), by means of at least a solenoid valve (12) of PWM type operated by the control means (14) fit to regulate pressing force transmitted by the mobile sector (1) in correspondence of the operating condition.
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