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Title:
ELECTRODEPOSITION COATING METHOD AND DEVICE
Document Type and Number:
Japanese Patent JP2019127644
Kind Code:
A
Abstract:
To provide an electrodeposition coating method and device capable of suppressing irregularity on an electrodeposition coating layer in a double coat, and maintains a step length of an electrodeposition coating line to almost equal to a prior step length.SOLUTION: The electrodeposition coating method comprises: a defatting washing step in which, a defatting tank storing a defatting liquid is provided in advance, an automotive body is immersed in the defatting liquid, and the defatting liquid is ultrasonic vibrated by an ultrasonic vibrator arranged on a lower part of the defatting tank, for defatting washing the automotive body; an electrodeposition coating step formed of a first electrodeposition step for forming a first electrodeposition coating on an automotive body, a washing water removal reduction step for removing or reducing an amount of washing water on a roof of the washed automotive body, a thermal flow step for performing thermal flow of the first electrodeposition coating so that, electric resistance of the first electrodeposition coating formed on an external plate part of the automotive body becomes higher than electric resistance of the first electrodeposition coating formed on an inner plate part, and a second electrodeposition step for forming a second electrodeposition coating to the automotive body.SELECTED DRAWING: Figure 1

Inventors:
SHINODA MASAFUMI
MATSUI HIROTAKA
Application Number:
JP2018011695A
Publication Date:
August 01, 2019
Filing Date:
January 26, 2018
Export Citation:
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Assignee:
MAZDA MOTOR
International Classes:
C25D13/14; C25D13/00; C25D13/20; C25D13/22; C25D13/24; F26B9/00; F26B21/04
Attorney, Agent or Firm:
Maeda patent office