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The manufacturer of putty spray machines will explain the advantages of high-pressure airless sprayers.

Release Date:

Apr 01,2022

A manufacturer of putty spray machines explains the advantages of high-pressure airless sprayers. In the early days of airless spraying, gear pumps were used to pressurize the coating material, but the pressure was relatively low, resulting in poor atomization at ambient temperatures. To address this limitation, the coating was preheated before being sprayed under pressure; this method is known as heated‑airless spraying. However, due to its bulky design and limited applications, this equipment has not achieved widespread adoption.

　　 Putty sprayer The manufacturer will explain the advantages of high-pressure airless sprayers.

　　 Putty sprayer Manufacturer: What types of high-pressure airless sprayers are available?

　　Classification and characteristics of high-pressure putty sprayers: airless spraying can be categorized into thermal‑spray, cold‑spray, electrostatic‑spray, and air‑assist types, among others. The development of airless spraying technology is closely linked to advances in related equipment.

　　(1) In the initial stage of airless spraying, a gear pump is used to pressurize the coating material; however, the pressure is relatively low, resulting in poor atomization at ambient temperature. To address this limitation, the coating is preheated before being sprayed under pressure. This method is known as heated‑airless spraying. Due to its bulky design and limited applications, this equipment has not achieved widespread adoption.

　　(2) Subsequently, a plunger pump is used to pressurize the coating; at higher pressures, atomization is improved, and the coating does not require heating, making the process relatively simple. This method, known as cold‑spray airless spraying, offers high spraying efficiency, low material consumption, and thicker paint films, making it well suited for large‑scale coating of sizable workpieces and thus widely adopted. Building on this approach, preheating the spray—particularly when applying high‑viscosity or high-solids coatings—can further enhance atomization, improve aesthetic quality, and yield thicker paint films.

　　(3) Electrostatic airless spraying combines the features of airless and electrostatic spraying, leveraging the strengths of each to enhance coating efficiency.

　　(4) Two-component airless spraying is a new technique developed to meet the requirements of applying two-component coatings.

　　(5) Air-assisted airless spraying combines the advantages of air spraying while enhancing the performance of airless spraying, operating at a lower spray pressure—approximately one-third that of conventional airless spraying.

　　 Putty sprayer Manufacturer: Advantages of Spray Guns

　　(1) High coating efficiency: Airless spraying delivers three times the efficiency of air spraying and ten times that of brush‑and‑wipe application, making it particularly well suited for large‑scale and extensive surfaces. Airless spraying also produces thicker coatings, reduces the number of coats required, and further enhances overall coating productivity.

　　(2) Excellent coating quality: Airless spraying does not use compressed air, thereby preventing water, oil, and dust from the compressed air from contaminating the coating and enhancing its quality.

　　(3) Significant reduction in environmental pollution: Airless spraying does not use air atomization, resulting in minimal paint overspray; moreover, it requires no diluents or only a small amount of diluent, substantially lowering VOC emissions and promoting environmental protection.

　　(4) Wide viscosity compatibility: Airless spraying can be used to apply low-viscosity conventional coatings, high-viscosity coatings, and thick‑paste coatings, particularly the latter.

　　Putty Spraying Machine Manufacturer: Disadvantages of the Spraying Machine:

　　(1) Airless spraying is unsuitable for small workpieces; due to paint mist dispersion and inefficient application, paint loss is significantly higher than with air spraying. Compared with brush coating, airless spraying consumes 20%–30% more paint.

　　(2) Airless spray guns lack mechanisms for adjusting both the spray pattern and spray width; consequently, during operation it is impossible to fine-tune either the spray volume or the spray width. Adjustments can only be made by replacing the nozzle, which poses certain challenges in spray‑coating applications.

　　(3) The paint spray pressure is very high, and the spraying speed is rapid, making it easy to puncture the operator’s skin and cause injury; special caution is required.

　　(4) Compared with air spraying, airless spraying requires a higher capital investment in equipment.

　　About Putty sprayer That’s all for today’s segment. Thanks for watching, and see you next time!

Next, we’ll discuss how to select spray equipment and the applications of putty‑spraying machines.

Applications and Features of Non-Curing Spray Machines