Solutions for dripping of air-assisted spray guns in industrial automation painting

An industrial automation, air-assisted technology, applied to the surface coating device, coating, spray device, etc., can solve the problems of the discharge hole and the ejector pin wear, the spray gun cannot stop transportation, and the speed of closing the gun is reduced. Realize the effect of production cost, reduction of replacement times, and extended shutdown time

Active Publication Date: 2021-11-05
NANJING BOPING ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The feed valve is closed first and then the air valve is closed. If things go on like this, after a period of use, the discharge hole and the thimble will be worn out. The wear will cause the material of the spray gun to be unable to stop transportation, and the spray gun will drip. By replacing the nozzle and thimble, adjust the springback Speed ​​strength, drop material has improved but can not be completely resolved
The reason is that the gun or the thimble is worn out, and when the thimble returns to the normal position before the gun is turned off, the discharge hole is not completely closed, and it needs to walk a certain distance to complete it. In addition, the air valve is not closed. Air pressure prevents ejector pin from recoil, which reduces closing speed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Automatic spray gun COG-R200-1.8, Mitsubishi software programming simulation, the spray gun has wear and tear after one year of use, when the gun is turned off, the test drip time is 0.6S, the material valve closing delay T3 is 0.5S, and the air valve closing delay 0.3S. After the calculation, the PLC program was changed, the material valve closing delay was changed to 0.3S, the air valve closing delay was changed to 0.8S, and the gun was tested again, and there was no dripping phenomenon after closing the gun.

[0012] The experiment was tracked for 8 hours, and the number of spraying was 10,000 pieces. Only for the unqualified products caused by dripping, the unqualified number was 0 pieces, and the defective rate was 0%.

Embodiment 2

[0014] Automatic spray gun COG-R200-1.8, Mitsubishi software programming simulation, the spray gun has wear and tear after one year of use, when the gun is turned off, the test drip time is 0.6S, the material valve closing delay T3 is 0.5S, and the air valve closing delay 0.3S. After calculation, change the PLC program, change the material valve closing delay to 0.5S, and the air valve closing delay to 0.8S, and test the gun again, and there is dripping after closing the gun.

[0015] The experiment was tracked for 8 hours, and the number of spraying was 10,000 pieces. Only for the unqualified products caused by dripping, the number of unqualified products was 200 pieces, and the defective rate was 2%.

Embodiment 3

[0017] Automatic spray gun COG-R200-1.8, Mitsubishi software programming simulation, the spray gun has wear and tear after one year of use, when the gun is turned off, the test drip time is 0.6S, the material valve closing delay T3 is 0.5S, and the air valve closing delay 0.3S. After calculation, change the PLC program, change the material valve closing delay to 0.3S, and the air valve closing delay to 0..5S, and then fire the gun to test again. After closing the gun, there is dripping.

[0018] The experiment was tracked for 8 hours, and the number of spraying was 10,000 pieces. Only for the unqualified products caused by dripping, the number of unqualified products was 400 pieces, and the defective rate was 4%.

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PUM

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Abstract

The invention relates to a method for solving the dripping material of an air-assisted spray gun for industrial automatic painting. The method is to ensure that the air valve is not closed before the material valve is completely closed by adjusting the PLC control program of the air-assisted spray gun when the thimble is worn and not replaced, so that the spray gun has no dripping material. In the present invention, when the thimble wears and does not need to be replaced, the closing time of the air valve is extended by writing the PLC program, and the closing time of the feeding valve is used to solve the dripping problem, improve the use effect of the industrial automatic coating gas-assisted spray gun, and realize the spray gun The number of replacements of vulnerable parts is reduced, and the qualified rate of products is improved at the same time, so as to reduce production costs.

Description

technical field [0001] The invention relates to a method for solving the dripping of an air-assisted spray gun in industrial automatic painting. When the thimble wears and does not need to be replaced, by adjusting the PLC control program of the air-assisted spray gun, the spray gun is free of dripping material, which ensures the consistency of product appearance, improves the pass rate of product quality, and reduces the need for later surface spraying repairs. Background technique [0002] Coating refers to the covering of metal and non-metal surfaces with protective or decorative layers. With the development of industrial technology, coating has been developed from manual to industrial automation, and the degree of automation is getting higher and higher. The utilization rate and scope of coating production lines are becoming more and more extensive. Many manufacturing companies want to improve product coating The quality has adopted the automatic air-assisted spraying p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D1/02B05B12/02B05B12/00
Inventor 李继强胡益民李自强
Owner NANJING BOPING ELECTRONICS TECH CO LTD
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