What is the cleaning method for painting equipment spray guns?

What is the cleaning method for painting equipment spray guns?

The cleaning method of the spray gun is crucial for ensuring its normal operation and extending its service life. The following are the detailed steps for cleaning the spray gun on the painting production line, including point by point representation and summary:

1, Preliminary preparation

Cleaning agent selection: Choose a diluent or solvent suitable for spray gun cleaning, and avoid using inferior cleaning agents or three no products.

Tool preparation: Prepare the necessary tools for cleaning the spray gun, such as a brush (use a soft brush, avoid using wire brushes or sharp tools), a circular toothpick or other brush (for cleaning the small holes of the air cap), a clean cloth, etc.

2, Cleaning steps

Pouring out excess paint: The coating production line manufacturer pours the excess paint from the paint tank into the waste paint storage bucket, pulls the trigger, and sprays the paint inside the gun body paint clean.

Flushing paint channel: The coating equipment manufacturer pours diluent for cleaning the spray gun into the paint tank, adjusts all valves on the spray gun to large, and pulls the trigger to flush the paint channel clean. Repeat this step until the sprayed diluent does not contain any paint.

Reverse flushing: Block the nozzle with a wiping cloth, pull the trigger, and use compressed air to reverse flush the spray gun to help remove residue from the nozzle and feeding tube.

Cleaning paint cans and spray cups: For siphon spray guns, remove the paint cans and leave the suction tube in the cup. Clean the inside and lid of the cup with solvent and a thin brush, then wipe off any residue with a cloth soaked in solvent. For pressure delivery spray guns, clean the paint tank and add some diluent to it. Reinstall the paint tank, open all air valves, pull the trigger, and let the solvent flow through the hose to achieve the purpose of cleaning the hose.

Clean the air cap and nozzle: Remove the air cap and clean the paint nozzle and air cap with a brush. Attention should be paid to cleaning the air cap by rinsing the air holes with a circular toothpick or other brush, and then blowing dry with compressed air. The cleaning of the nozzle should avoid using sharp tools such as iron wires or nails to prevent damage to the nozzle.

External cleaning: Use a cloth soaked in diluent to wipe the outside of the gun body clean, paying attention to wiping off all paint marks.

3, Precautions

Avoid prolonged soaking: Do not immerse the entire spray gun in cleaning agents or any liquids, and do not soak the nozzle three piece set in cleaning agents for a long time.

Air pressure control: During the cleaning process, use low air pressure to avoid paint splashing or damaging spray gun components.

Solvent recovery: During operations such as cleaning spray guns, a large amount of solvent will remain. For environmental protection and resource conservation, a solvent recovery machine can be used to recycle dirty solvents and obtain clean solvents.

4, Lubrication and maintenance

After each use of the spray gun, a few drops of mechanical lubricating oil should be injected to lubricate all parts of the spray gun. For the spray gun that needs to be used every day, add some light grease to the spring parts (such as the top needle spring for controlling paint and the spring for the air valve). This helps maintain the good performance and extend the service life of the spray gun.

By following the above steps and precautions, it is possible to ensure that the spray gun is cleaned and maintained, preparing it for the next use.