TAIZHOU ZEGO-TOOL MACHINERY CO.,LTD.
Contact Us
Elements and Cleaning Methods of Water-based Coating Spray Gun Spraying

Elements and Cleaning Methods of Water-based Coating Spray Gun Spraying

I. Three elements of spray gun spraying for water-based paint


That is, the distance of spraying, the trajectory of operation, and the overlap of spraying are important factors that directly affect the spraying quality of the spray gun. You must pay attention to it during normal operation.


1. Spraying distance


Spraying distance refers to the distance from the nozzle of the water-based spray gun to the object to be coated. The traditional air spraying distance is 20-30cm for large spray guns and 15-25cm for small spray guns. The spraying distance of the electrostatic spray gun is generally 20 to 30 cm.


If the spraying distance is too short, the coating film formed per unit time will be thick, which is easy to cause sagging; if the spraying distance is too long, the coating film will be thin and the loss of coating will increase. In severe cases, the coating film will have no gloss.


2. The trajectory of the operation


The trajectory of water-based paint spray gun operation needs to consider two aspects: the angle of spraying and the running speed of the spray gun. When spraying, keep the spray gun running at right angles and parallel to the surface of the object to be coated. The moving speed of the spray gun is generally adjusted within the range of 30 to 60 cm/s and is required to be constant.


If the high quality spray gun is inclined and runs in an arc trajectory or the running speed is variable, the uniform thickness of the coating film will not be obtained, which will easily cause the coating film to produce flowers, orange peel and sagging.


3. Atomization and spray range


The overlap width of the spray pattern should be kept constant. If the overlap width is variable, the film thickness is not uniform, and the coating film is prone to defects.


II. Cleaning method of water-based paint spray gun


After the water-based paint spray gun is used, spray and clean with the thinner of the sprayed paint until the paint channel of the spray gun is cleaned. Otherwise, the paint in the gun will become dry and clogged, which will affect the normal use of the spray gun.


(1) Specific cleaning method of water-based paint spray gun


1. Turn off the compressed air, remove the paint storage tank, pour the paint in the gun back into the paint storage tank, and pour the paint in the tank into the container;


2. Pour about 1/4 volume of solvent into the paint storage tank for washing, install the paint storage tank, turn on the compressed air, and repeatedly rock and spray several times;


3. Disassemble the spray head, clean it with solvent and install it; wipe the paint on the gun body.


(2) Pay attention to the following points when washing water based paint spray gun:


1. Use soft brushes when scrubbing, metal brushes are forbidden, hard objects are not allowed to poke or scrape, to prevent the nozzle from being worn and the shape of the jet to change;


2. Avoid soaking the spray gun directly in the solvent to prevent the residual paint from attaching to the machine parts and dissolving the lubricating oil on the gun. You can use a soft cloth moistened with solvent to wipe it;


3. The knurled parts on the high-quality spray gun are adjusted by hand, avoiding the use of pliers tools;


4. Regularly drip lubricating oil on the needle valve and bolt pin shaft;


5. Regularly apply light grease or petroleum jelly to lubricate the needle valve and needle valve spring, and do not use silicon-containing oil.

Related News
  • Tips on Selecting The Auto Spray Gun

    Tips on Selecting The Auto Spray Gun

    August 31, 2021Auto paint spray gun is a common hardware automatic tool, mainly used for spraying paint, coating, etc. There are many brands and models of auto spray guns on the market. There are three main factors ...view
  • Detailed Steps Of Hvlp Car Painting

    Detailed Steps Of Hvlp Car Painting

    July 2, 2021Detailed steps of HVLP car paintingWhen a car is exposed to the sun and wind for a long time, the paint is bound to lose its color. Sometimes the car also inevitably cut, then through the vehicle pain...view
  • Mini Car Paint Sprayers: The Key to Professional-Quality DIY Auto Painting

    Mini Car Paint Sprayers: The Key to Professional-Quality DIY Auto Painting

    September 19, 2023Painting your car can be a daunting task, but with the right tools, it's possible to achieve professional-quality results from the comfort of your own garage. Mini car paint sprayers have emerged ...view