Powder layer composite, coating film, powder coating method, and powder coating apparatus

Patent metadata

Field	Value
Publication number	US-12157137-B2
Application number	US-202318539606-A
Country	US
Kind code	B2
Filing date	Dec 14, 2023
Priority date	Sep 16, 2020
Publication date	Dec 3, 2024
Grant date	Dec 3, 2024

Abstract

A powder layer composite includes a base and a powder layer having a thickness of 100 μm or less and disposed on the base. An average of a total value of a number of powder aggregates having a long diameter of 500 μm or greater and a number of pinholes having a long diameter of 500 μm or greater, in any of a plurality of different regions of 20 mm×20 mm on a surface of the powder layer, is 0.2 pieces/cm2 or less.

First claim

What is claimed is:

1. A powder coating apparatus comprising:
an injector;
a powder disperser that disperses a powder and comprises a cup and an atomizer, the cup below the injector and the atomizer below the cup; and
a spray gun connected to the injector with a supply hose, wherein:
the injector is connected to the powder disperser and supplies a dispersed powder directly onto a base without storing the powder,
the atomizer crushes and atomizes the powder in the cup by ultrasonic vibrations into an aerosol powder,
the aerosol powder in the cup is sucked into the injector and transported through the supply hose to the spray gun, and
the spray gun is configured to spray the aerosol-like powder together with air as the dispersed powder onto the base.

2. The powder coating apparatus of claim 1 , wherein the powder disperser further comprises at least one of an air flow fine crusher, a grinding fine crusher, a stirring fine crusher, a vibration fine crusher, a swirling air flow air classifier, a centrifugal classifier, and a vibration screen classifier.

3. The powder coating apparatus of claim 1 , wherein
the powder disperser further comprises at least one of an ultrasonic vibrator that ultrasonically vibrates the powder and a voltage applier that applies a high voltage to the powder.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Okochi Motohiro
• Horikawa Akihiro
• Kojima Toshiyuki

Classifications

• C08L33/08

  Homopolymers or copolymers of acrylic acid esters · CPC title

• B05B17/0607

  generated by electrical means, e.g. piezoelectric transducers · CPC title

• B05B5/0255

  spraying and depositing by electrostatic forces only · CPC title

• B05B7/144 Primary

  the means for supplying particulate material comprising moving mechanical means (B05B7/1422, B05B7/1459 take precedence) · CPC title

• B05B5/1683

  specially adapted for particulate materials · CPC title