Paint circulation system

Patent metadata

Field	Value
Publication number	US-2016184784-A1
Application number	US-201514910933-A
Country	US
Kind code	A1
Filing date	May 13, 2015
Priority date	Jun 11, 2014
Publication date	Jun 30, 2016
Grant date	—

Abstract

A paint circulation system includes: a main line; a branch line; a supply pump; and a pressurization device for storing pressure of the paint in a high-pressure state in which the pressure of the paint is higher than a predetermined pressure, and for applying pressure to the paint inside of the branch line in a low-pressure state in which the pressure of the paint is lower than the predetermined pressure, in which sedimentation of the paint is prevented by driving the supply pump so that the high-pressure state and the low-pressure state occur, to cause flow sending the paint inside of the branch line from a side of the painting device to a side of the main line using a pressure difference between the predetermined pressure in the low-pressure state and the pressure of the paint.

First claim

1 . A paint circulation system for supplying paint from a paint tank to a painting means, comprising:
a loop-like main line in which the paint is supplied from the paint tank; a branch line that branches from the main line, and is connected to the painting means; a supply pump that pressure-feeds the paint supplied to the main line to a side of the painting means; and a pressurization means for storing pressure of the paint in a high-pressure state in which the pressure of the paint pressure fed by the supply pump is higher than a predetermined pressure, and for applying pressure to the paint inside of the branch line in a low-pressure state in which the pressure of the paint is lower than the predetermined pressure, wherein sedimentation of the paint is prevented by driving the supply pump so that the high-pressure state and the low-pressure state occur, to cause flow sending the paint inside of the branch line from a side of the painting means to a side of the main line using a pressure difference in the low-pressure state.

2 . The paint circulation system according to claim 1 ,
wherein the pressurization means includes: a main body having a hollow portion inside thereof; a piston that slides inside of the main body; a storage chamber that is disposed at one side in an axial direction of the piston inside of the main body, and is in communication with the branch line; an accumulator that is disposed at another side in the axial direction of the piston inside of the main body, and in which gas is filled; and a pressure regulating unit that regulates pressure of the accumulator to the predetermined pressure.

3 . The paint circulation system according to claim 1 , wherein the paint circulation system drives the supply pump so that the pressure inside of the main line varies at a predetermined time interval between the high-pressure state higher than the predetermined pressure and the low-pressure state lower than the predetermined pressure.

4 . The paint circulation system according to claim 1 , wherein the pressurization means is connected in communication in the branch line in a vicinity of the painting means.

5 . The paint circulation system according to claim 1 , further comprising:
a bypass line having an end on one side connected more to a side of the painting means than a portion at which the pressurization means is connected in the branch line, and having an end on another side that is connected more to a side of the main line than a portion at which the pressurization means is connected; and a unidirectional valving means that permits flow in one direction to a side of the painting means in the branch line, and permits flow in one direction to a side of the main line in the bypass line, wherein flow sending the paint from a side of the painting means to a side of the main line through the bypass line is produced in the low-pressure state.

Assignees

• Honda Motor Co Ltd

Inventors

• Goto Masaya
• Tajima Eimitsu

Classifications

• B01F5/10 Primary

  Operations & Transport · mapped topic

• B05B5/16 Primary

  Arrangements for supplying liquids or other fluent material · CPC title

• B01F2101/30

  Mixing paints or paint ingredients, e.g. pigments, dyes, colours, lacquers or enamel · CPC title

• B05B12/14

  for supplying a selected one of a plurality of liquids or other fluent materials {or several in selected proportions} to a {spray apparatus, e.g. to a} single spray outlet · CPC title

• B01F23/023

  Preventing sedimentation, conglomeration or agglomeration of solid ingredients during or after mixing by maintaining mixed ingredients in movement · CPC title