In the actual operation of glue coating machine, the problem of glue adhesion on the surface of accessories is a common and influential problem. It may lead to a series of problems such as uneven glue coating, equipment failure and increased maintenance costs. Surface treatment processes such as hard chrome plating and Teflon coating are effective means to solve this problem, which is of great significance to improving the performance and stability of glue coating machine.
Hard chrome plating is a commonly used surface treatment process, which forms a hard and smooth chrome layer on the surface of glue coating machine accessories. This chrome layer has a low surface energy and can effectively reduce the affinity of glue to the surface of accessories. From a molecular level, low surface energy makes it difficult for glue molecules to adsorb and adhere to the surface of the chrome layer, thereby reducing the amount of glue adhesion. For example, after hard chrome plating on the glue roller of the glue coating machine, the spreading area of glue on the surface of the glue roller is significantly reduced, and it can be quickly transferred from the surface of the glue roller to the coated object, reducing the glue residue on the surface of the glue roller and improving the efficiency and quality of glue coating.
Teflon coating is famous for its excellent non-stickiness. The molecular structure of Teflon is very stable and the surface friction coefficient is extremely low. When the surface of glue coating machine accessories is coated with Teflon coating, the friction between glue and the coating surface is extremely small, and it is difficult for glue to stay on its surface. At the same time, Teflon coating has good chemical inertness and is not easy to react chemically with glue, which further enhances its anti-stick performance. For example, using Teflon coating at the nozzle of the glue coating machine, even high-viscosity glue can be sprayed out smoothly and will not adhere to the inner wall of the nozzle, ensuring the precise coating of glue.
Although hard chrome plating and Teflon coating can significantly improve the anti-stick effect of glue coating machine accessories, there are some differences in their anti-stick performance. Hard chrome plating has a higher hardness and is more suitable for use in some accessories that need to withstand greater pressure and wear. Its anti-stick effect is relatively long-lasting. The anti-stick performance of Teflon coating is more prominent, especially for some glues with stronger viscosity, it can better exert its non-stick characteristics. However, the hardness of Teflon coating is relatively low, and it may be easily worn in some harsh working environments, affecting its anti-stick effect.
Whether it is hard chrome plating or Teflon coating, they both change the microstructure of the accessory surface. Hard chrome plating makes the accessory surface smoother and flatter, reduces the surface unevenness, and thus reduces the adhesive points of the glue on the surface. Teflon coating forms a uniform and dense film on the surface of the accessory, which fills the tiny pores on the surface, making it impossible for the glue to penetrate into the interior of the accessory, further improving the anti-sticking effect. Through electron microscopy observation, it can be found that the microstructure of the accessory surface after surface treatment is more regular, which is conducive to the rapid detachment of the glue.
When performing hard chrome plating and Teflon coating treatment, process parameters have an important influence on the anti-sticking effect. For example, when plating hard chrome, the composition, temperature, current density and time of the plating solution will affect the quality and performance of the chrome layer. If the parameters are set improperly, the thickness of the chrome layer may be uneven and the surface roughness may not meet the requirements, thus affecting the anti-sticking effect. For Teflon coating, parameters such as coating thickness, curing temperature and time also need to be precisely controlled. The appropriate coating thickness can ensure its good non-stick and wear resistance, while the correct curing conditions can make the coating closely bonded to the surface of the accessories, improving its adhesion and anti-stick performance.
Surface treatment processes such as hard chrome plating and Teflon coating play a vital role in the anti-stick effect of accessories by changing the surface energy, microstructure and other characteristics of glue coating machine accessories. They can effectively reduce the adhesion of glue on the surface of accessories, improve the quality and efficiency of glue coating, and reduce the maintenance cost of equipment. In practical applications, it is necessary to reasonably select the surface treatment process according to factors such as the working environment of the glue coating machine, the characteristics of the glue, and the use requirements of the accessories, and strictly control the process parameters to give full play to the advantages of these processes and achieve the best anti-stick effect.
