What causes blockages in the spray marking gun or nozzle of the marking machine, and what are the solutions?

There are many reasons that can cause spray marking or nozzle blockage, including:

Q: Equipment cleaning is not timely and thorough, resulting in solidification and gun blockage

A: After the construction of the external mixing gun equipment is completed, all pipelines must be thoroughly cleaned. If the construction process is stopped for 2 minutes, the internal mixing gun must be cleaned immediately, and all pipelines must be thoroughly cleaned after the construction is completed. The cleaning agent for the cleaning material must be packaged in separate buckets

Q: The mixer is not cleaned thoroughly, and the small hard lumps formed by the drying of the paint residue on the mixer cause gun blockage

A: After mixing the paint, it is necessary to thoroughly clean the mixing blades by high-speed rotation in the cleaning solution, and the mixing rod should also be brushed clean with a brush.

Q: Impurities in the paint cause gun blockage

A: Re filter the coating with an 80 mesh filter or replace the coating, and check and replace the filter.

Q: Splashing and skewing during mixing can also cause small lumps to block the gun

A: During mixing, solidification and agglomeration may occur inside the bucket, causing blockage of the gun. When mixing, it is necessary to keep a distance or cover the bucket lid to prevent splashing and mixing of materials.

Q: The paint settles after being left for too long, and is used without stirring or mixing evenly, causing gun blockage

A: Add 2% -4% curing agent and stir for 3-5 minutes. If the material is aged, the stirring time should be extended.

Q: The quality of the coating is too poor, the fineness is not enough, and the particles are too large

A: Choosing a good paint supplier, it is best for each paint factory to test one set of materials before construction to avoid various problems during the construction process, downtime, impact on the project schedule, and economic losses.

Q: Insufficient mixing of curing agent, or crystallization of paste like curing agent or agglomeration of powder like curing agent, resulting in uneven mixing and gun blockage

A: There is a fire-resistant protective liquid on top of the paste like curing agent. As the temperature decreases, the protective liquid will form crystals, making it difficult to stir evenly and causing gun blockage. Therefore, it is necessary to scrape off the layer of protective liquid on top of the paste like curing agent; Powder curing agent clumps must be thoroughly crushed into powder before use, and must be stirred evenly.

Q: Accidentally spilling glass beads into the paint bucket while adding, causing gun blockage

A: When adding glass beads, be sure to cover them and avoid spilling them into the paint bucket. The edge of the glass bead can should also be cleaned before covering it to prevent residual glass beads from being blown into the paint bucket by wind and causing gun blockage.

Q: The filter screen is damaged and not filtered, and the gun is blocked

A: Regularly check whether the suction tube head and the filter mesh inside the filter are damaged, replace them in a timely manner, and avoid poor filtration that may block the gun and affect the construction progress.

Q: Insufficient nozzle flow causes gun blockage

A: Choose a nozzle with appropriate flow rate