Powder coating device and powder coating method

Patent metadata

Field	Value
Publication number	US-11638930-B2
Application number	US-202117216624-A
Country	US
Kind code	B2
Filing date	Mar 29, 2021
Priority date	Mar 30, 2020
Publication date	May 2, 2023
Grant date	May 2, 2023

Abstract

Provided is a powder coating device. The powder coating device performs powder coating by inserting peeled parts at a lower end of a stator into a powder flow tank filled with a powder resin and includes: a surface height measurement part measuring a surface height of the powder resin; a peel height measurement part measuring a height of upper ends of the peeled parts; a swing part swinging the powder resin; an air supply part supplying air toward the powder flow tank via a porous body provided below an open bottom surface of the powder flow tank, and flowing the powder resin; and an adjustment part adjusting at least one of an air flow rate, a swing amount of the powder flow tank, an entry posture and an entry amount of the stator according to measurement results of the surface height measurement part and the peel height measurement part.

First claim

What is claimed is:

1. A powder coating device which performs powder coating by inserting a plurality of parts at a lower end of a workpiece where an insulating coating has been peeled off into a powder flow tank with closed sides and filled with a powder resin, the powder coating device comprising:
a surface height measurement part, comprising a sensor which measures a surface height of the powder resin filled in the powder flow tank at a first plurality of points;
a peel height measurement part, comprising a sensor which measures a height of upper ends of the plurality of parts of the workpiece where the insulating coating has been peeled off at a second plurality of points;
a swing part, comprising a motor which vibrates the powder flow tank and swings the powder resin filled in the powder flow tank;
an air supply part which supplies air toward the powder flow tank via a porous body provided below a bottom surface that is opened of the powder flow tank, and which flows the powder resin filled in the powder flow tank; and
an adjustment part which adjusts at least one of a flow rate of the air, a swing amount of the powder flow tank, an entry posture of the workpiece with respect to the powder flow tank and an entry amount of the workpiece with respect to the powder flow tank according to measurement results of the surface height measurement part and the peel height measurement part.

2. The powder coating device according to claim 1 , wherein the adjustment part comprises:
a first determination part which determines adjustment of the entry posture of the workpiece and the entry amount of the workpiece; and
a second determination part which determines adjustment of the flow rate of the air and the swing amount of the powder flow tank,
wherein the second determination part determines the adjustment after the first determination part determines the adjustment.

3. The powder coating device according to claim 1 , wherein the surface height measurement part and the peel height measurement part simultaneously measure the height of the workpiece and the surface height of the powder resin in a same phase with respect to a circumferential direction of the powder flow tank.

4. The powder coating device according to claim 2 , wherein the surface height measurement part and the peel height measurement part simultaneously measure the height of the workpiece and the surface height of the powder resin in a same phase with respect to a circumferential direction of the powder flow tank.

5. A powder coating method comprising:
filling a powder resin into a powder flow tank with closed sides;
measuring a surface height of the powder resin filled in the powder flow tank at a first plurality of points;
measuring a height of upper ends of a plurality of parts at a lower end of a workpiece where an insulating coating has been peeled off at a second plurality of points;
vibrating the powder flow tank and swinging the powder resin filled in the powder flow tank;
supplying air toward the powder flow tank via a porous body provided below a bottom surface that is opened of the powder flow tank and flowing the powder resin filled in the powder flow tank;
inserting a part including the plurality of parts at the lower end where the insulating coating has been peeled off with a predetermined entry posture of the workpiece into the powder resin flowing in the powder flow tank by a predetermined entry amount with respect to the powder flow tank; and
adjusting at least one of a flow rate of the air, a swing amount of the powder flow tank, the entry posture of the workpiece with respect to the powder flow tank and the entry amount of the workpiece with respect to the powder flow tank according to the measured surface height of the powder resin and the measured height of the upper ends of the plurality of parts of the workpiece where the insulating coating has been peeled off,
wherein the power coating method is performed by a powder coating device which performs powder coating by inserting the plurality of parts at the lower end of the workpiece where the insulating coating has been peeled off into the powder flow tank with closed sides and filled with the powder resin, the powder coating device comprising:
a surface height measurement part which measures the surface height of the powder resin filled in the powder flow tank at the first plurality of points;
a peel height measurement part which measures the height of upper ends of the plurality of parts of the workpiece where the insulating coating has been peeled off at the second plurality of points;
a swing part which vibrates the powder flow tank and swings the powder resin filled in the powder flow tank;
an air supply part which supplies air toward the powder flow tank via the porous body provided below the bottom surface that is opened of the powder flow tank, and which flows the powder resin filled in the powder flow tank; and
an adjustment part which adjusts at least one of the flow rate of the air, the swing amount of the powder flow tank, the entry posture of the workpiece with respect to the powder flow tank and the entry amount of the workpiece with respect to the powder flow tank according to measurement results of the surface height measurement part and the peel height measurement part.

Assignees

• Honda Motor Co Ltd

Inventors

• Shimizu Hiroomi
• Miyanaga Kenji

Classifications

• B05C19/06 Primary

  Storage, supply or control of the application of particulate material; Recovery of excess particulate material · CPC title

• B05C19/04 Primary

  the particulate material being projected, poured or allowed to flow onto the surface of the work (B05C19/02 takes precedence; involving spraying or electrostatic projection B05B ){(B05C19/005 takes precedence)} · CPC title

• B05C19/02 Primary

  using fluidised-bed techniques (fluidised-bed technique in general B01J8/24) · CPC title

• H02K15/12

  Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines · CPC title

• B05D1/00

  Processes for applying liquids or other fluent materials (B05D5/00, B05D7/00 take precedence) · CPC title