Detection method

Abstract

To provide a detection method for accurately detecting nozzle clogging in a powder coating apparatus that uses a carrier gas to transport powder and sprays the powder from a nozzle, even when the structure is such that the powder falls vertically or when the nozzle has multiple spray holes. [Solution] The detection method according to the present invention is a detection method for detecting clogging of a nozzle 13 in a powder coating apparatus 1 that transports powder P using a carrier gas G and sprays the powder P from a nozzle 13, comprising: a measurement step S1 in which the flow rate of the carrier gas G is measured using an ultrasonic flow meter 12; and a detection step S2 in which clogging of the nozzle 13 is detected based on the measured flow rate of the carrier gas G.

Claims

1. A powder coating apparatus that uses a carrier gas to transport powder and sprays the powder from a nozzle, wherein a detection method for detecting a clogged nozzle is provided, A measurement step of measuring the flow rate of the carrier gas using an ultrasonic flow meter, The system includes a detection step of detecting a blockage in the nozzle based on the measured flow rate of the carrier gas, Detection method.

2. The nozzle is equipped with multiple nozzles, In the detection step, it is detected how many of the multiple nozzles are clogged. The detection method according to claim 1.

3. In the measurement step, the flow rate of the carrier gas near the nozzle is measured. The detection method according to claim 1.

4. In the measurement step, the flow rate of the carrier gas is measured from a reference time determined based on the timing at which the powder is introduced into the powder coating device until a predetermined time has elapsed from the reference time. In the detection step, the nozzle blockage is detected based on the integrated value of the carrier gas flow rate. The detection method according to claim 1.

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