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Pigment orientation estimating method

A pigment and orientation technology, applied in the direction of material inspection products, etc., can solve the problem that there is no method for estimating the orientation of pigments

Inactive Publication Date: 2012-02-29
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As mentioned above, the process by which the coating is dried is important for the orientation of the pigment; however, there is no method for estimating the orientation of the pigment that takes the drying process into account

Method used

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  • Pigment orientation estimating method
  • Pigment orientation estimating method

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Embodiment Construction

[0026] As mentioned above, there is a need to understand how the appearance of a coating changes as the properties of the paint and / or the finishing conditions change. Furthermore, the orientation of the pigments is of the utmost importance in the appearance of the coating.

[0027] For example, in the case of aluminum pigments, the more the pigment orientation is aligned parallel to the painted surface, the better the appearance of the metallic colour. Therefore, by estimating the orientation of the pigments on a computer, it is possible to save time and effort for testing the appearance of actually prepared painted panels. The pigment orientation estimation method according to the present embodiment is implemented by executing a program for estimating pigment orientation on a computer.

[0028] figure 1 is a flowchart illustrating a method for estimating a pigment orientation according to an embodiment of the present invention. First, in step S101, parameters such as char...

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Abstract

The orientation of pigments (11) when a paint (12) is applied is set, and the orientation of the pigments (11) at time (t) at which a predetermined period of time has elapsed from when the paint is applied is calculated on the basis of a shrinkage rate gradient of the paint (12) in a thickness direction of a coating in the process of drying the paint. Thus, by assuming the state where the pigments (11) are dispersed in the paint (12) as the state where spheroids are present in viscous fluid, and applying the motion model in which the spheroids present in the fluid rotate by a difference in velocity of flow of the fluid, the orientation of the pigments (11) depending on the characteristic of a paint and a painting condition is estimated.

Description

technical field [0001] The present invention relates to a pigment orientation estimation method for estimating the orientation of pigments present in a coating. Background technique [0002] In order to ensure consistent coating quality, it is necessary to understand how the coating appearance changes when the coating properties and / or painting conditions change. The orientation of the pigments in the coating is of most importance in the appearance of the coating. [0003] Japanese Patent Application Publication No. 2005-147875 (JP-A-2005-147875) describes a method of estimating the orientation of a pigment. In this method, a plurality of painted panels are prepared that are painted under different paint conditions and / or different finishing conditions. Then, position information of the pigment in the coating was obtained from a cut piece of each painted board, and the inclination of the pigment with respect to the coating surface was calculated from the position informati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/32
CPCG01N33/32
Inventor 西村彰渡边明弘笠井隆志
Owner TOYOTA JIDOSHA KK
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