1. Controlling the particle size distribution is crucial for achieving optimal results. A narrower distribution ensures better consistency in the final product. During production, we fine-tune the speeds of the primary and secondary grinding stages in the ACM machine. The ideal particle size range is between 40-50 micrometers, with minimal variation across the spectrum.
2. Enhancing the resin content is another key factor. By increasing the proportion of resin and reducing filler usage, we can achieve superior performance. It's advisable to use resins with excellent charging capabilities, such as epoxies, which perform better than polyesters in certain applications. Some manufacturers find it challenging to create powders using polyester resins, but they excel when paired with specialized equipment like friction spray guns. These guns offer better coverage and smoother finishes compared to electrostatic ones, avoiding issues like an exaggerated orange peel effect.
3. Choosing the right filler is equally important. The fineness and dispersibility of fillers play a significant role in the overall quality of the powder. Precipitated powders generally outperform standard ultrafine ones, while barium sulfate tends to be more effective than calcium carbonate.
4. Incorporating appropriate charging aids is essential for improving coverage, especially in hard-to-reach areas. Conductive additives in the formulation help boost the electrical charge of the powder particles. Near the electrostatic spray gun, a strong electric field ionizes the air, creating millions of ions. As charged particles pass through this zone, they become polarized, attracting additional negative ions and carrying a stronger charge. This is particularly beneficial for areas with weaker electric fields, like grooves or recessed sections, ensuring better adherence to the workpiece and enhancing overall coverage.
Additional Notes: To further optimize the process, regular maintenance of the spraying equipment is recommended. Ensuring clean and well-calibrated machines prevents inconsistencies in particle size and application. Additionally, experimenting with different formulations can yield surprising improvements in both efficiency and finish quality.Heilongjiang Junhe Building Materials Technology Co., Ltd , https://www.junhejiancai.com