UV LED curing machines have been applied in industries such as household appliances, consumer electronics, automobiles, and new energy. The installation of UV LED curing machines on automated production lines has significantly improved production capacity and product consistency, saved material loss, and reduced costs for manufacturers.
In the electronics manufacturing industry, the installation and use of UV LED curing machines should consider factors such as the installation size and wavelength of the UV LED curing machines. Electronic products are manufactured in various sizes, and for different electronic devices, the conveyor belt width and the irradiation area of the UV LED Lamp head should be properly adjusted. With the development of UV LED curing technology, UV LED curing machines have been widely applied in automated production lines. Compared with traditional curing methods, UV LED curing machines are more suitable for automated production lines because they have fast curing speeds, simple operations, energy savings, and flexible installations.
The curing speed and effectiveness of UV LED curing machine mainly depend on how easily the ultraviolet light enters the curing material and triggers photolysis. UV curing depends on the collision between photons and molecules. Light can trigger the uniform diffusion of molecules through the material. In addition to the characteristics of UV LED curing machine, the optical and thermodynamic properties of the curing material and the interaction with radiation energy have a significant impact on the curing process.
The energy of light is absorbed by the UV coating within increasing thickness. The more energy absorbed near the surface, the less energy obtained in the deep layer. But this varies with wavelength. Total spectral absorption includes the effects of photoinitiators, single molecule substances, polymers, and additives, including pigments.
Compared with absorption, light energy is usually caused by substrate materials or pigments in the curable material and is often changed direction by ink, producing reflection and scattering. These factors reduce the UV energy of the deep layer but improve the curing efficiency at the reaction site.
Temperature has a significant effect on the curing rate of the reaction; although the temperature rise during the reaction process is also relatively effective.
The material's absorption of spectral varies depending on wavelength. Obviously, short UV wavelengths (200~300nm) are absorbed by the surface and cannot reach the bottom layer. Even photoinitiators absorb its sensitive wavelength range, obstructing the wavelength from reaching the deep layer photolysis.
The required UV LED wavelength for curing varies depending on the UV coating. When choosing a UV LED curing machine, it is necessary to select one that matches the wavelength required by the UV coating to achieve better curing effects.