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Electrostatic atomizer and its cleaning method

An electrostatic coating and cleaning solution technology, applied in the direction of electrostatic spraying devices, spraying devices, liquid supply devices, etc., can solve the problems of increasing characteristics and reducing characteristics slowly, paint consumption, etc., to improve responsiveness, reduce waste, Effect of suppressing unnecessary spray

Active Publication Date: 2006-10-04
TOYOTA JIDOSHA KK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] As a common problem with pressure feeding paint from an external paint tank and pressure feeding paint from a cartridge paint tank assembly and spraying paint, there is a slow ramp-up characteristic when spray starts and a slow decrease characteristic when spray stops , so the problem of unnecessary consumption of paint when spraying starts and when spraying stops

Method used

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  • Electrostatic atomizer and its cleaning method
  • Electrostatic atomizer and its cleaning method
  • Electrostatic atomizer and its cleaning method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Example 1 ( Figure 1 to Figure 6 )

[0046] figure 1 Indicates a cartridge paint tank assembly 1 that can be installed on an electrostatic paint coater. The illustrated paint tank assembly 1 includes a flexible paint bag 2 as a paint container for storing paint. The paint bag 2 has a substantially rectangular parallelepiped outline shape, and has a relatively rigid rectangular frame 4 on a pair of side walls 3 facing each other. At least two end walls of the paint bag 2 and the other two walls other than the pair of side walls 3 corresponding to the rectangular frame 4, that is, the two side walls facing each other extending between the pair of frames 4 and 4 are relatively soft. material, whereby a pair of frames 4, 4 can approach each other. The soft side wall 3 of the paint bag 2 can be protected from erosion by thinner (paint solvent) if it is water-based paint or oil-based paint by laminating polypropylene, fluorocarbon resin, etc. on a metal sheet made of alu...

Embodiment 2

[0069] Example 2 ( Figure 7 , Figure 8 )

[0070] When it is necessary to change the color or the paint of the paint bag 2 is used up, the above-mentioned embodiment 1 is to replace the paint box assembly 1 including the paint bag 2, but in this embodiment 2, the tank body 24 is replaced of. That is, if Figure 7 As shown, the tank body 24 containing the paint tank assembly 1 including the paint bag 2 can be connected to the pump part 23 of the coating machine 20 including the atomization generation part 22 and the pump part 23 through the automation system outside the figure. Removable. When the color needs to be changed or the paint in the paint bag 2 is used up, the tank body 24 is unloaded from the coating machine 20 , and a new tank body 24 is installed on the pump part 23 of the coating machine 20 .

[0071] In the tank body 24, for example, a check valve or an on-off valve 52 ( Figure 7 , Figure 8 ). The operation of refilling the empty tank body 24 (paint b...

Embodiment 3

[0073] Embodiment 3 ( Figure 9 )

[0074] In the above-mentioned Embodiments 1 and 2, the coating machine that supplies the paint from the tank body 24 to the single bell cup 21 is illustrated, but it can also be used as Figure 9 As shown, paint is supplied from a single tank 24 to two or more bell cups 21 . Figure 9 The illustrated dual head coater has 2 heads. The two heads each have a pump unit 23 and an atomization generating unit 22 , and paint is supplied to each pump unit 23 through paint supply passages 55A and 55B branched from a paint outlet 50 of a single tank body 24 into two branches. Figure 9 The shown reference numeral 56 denotes a cleaning gate valve, and when the color is changed, the cleaning gate valve 56 is opened to introduce cleaning liquid such as thinner into the internal paint passage of the coating machine 20 from the outside. Figure 9 The shown reference numeral 57 denotes a motor coupling, and 58 denotes a cleaning sleeve.

[0075] For Exam...

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Abstract

An electrostatic coating machine (20) has a removable canister (24), and when a coating material bag (2) included in the canister (24) is empty, the bag is replaced with a new canister (24). A coating material in the coating material bag (2) is taken out by a mono pump (35) provided in a pump section (23) of the electrostatic coating machine (20). The mono pump (35) has a helical shaft (36) provided in a coating material feed tube (31). The mono pump (35) is driven by a servomotor through an insulative drive shaft (38). The coating material in the coating material bag (2) is sucked by the rotation of the helical shaft (36), and the sucked coating material is fed to a bell cup (21) through a feed tube (31). Controlling and stopping spraying of the coating material atomized by the bell cup (21) is performed by controlling the rotation of the mono pump (35).

Description

(1) Technical field [0001] The invention relates to an electrostatic coating machine and a cleaning method thereof. (2) Background technology [0002] Japanese Patent Laying-Open No. 01-130751 discloses a typical configuration of an automatic coating system including an electrostatic coating machine. That is, the quantitative supply of paint to the electrostatic coating machine is performed by a pump that pressure-feeds paint from an external paint source to the electrostatic coating machine, and a valve housed in a chamber separate from the paint electrostatic coating machine. of. [0003] The outline of the automatic coating system will be described with reference to the above-mentioned JP-A-01-130751. An electrostatic coating machine is mounted on the arm of a robot installed in an automatic coating production line. The electrostatic coating machine is connected with the external compressed air source and paint tanks of various colors through the valve chamber. Many so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05B5/16B05B12/14B05B15/02
CPCB05B15/025B05B5/1608B05B12/1463B05B15/55
Inventor 三井三千雄谷真二榊原正人户田纪三夫细田俊男
Owner TOYOTA JIDOSHA KK
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