How Do UV Marking Machine Work
UV marking machines use ultraviolet (UV) light to create high-contrast, permanent marks on various materials without damaging the surface. Here’s how they work:
1. Principle of UV Marking
UV marking relies on photochemical reactions or pigment curing rather than heat (like lasers) or physical contact (like engraving). The UV-sensitive ink or coating changes color or hardens when exposed to UV light.
2. Key Components
UV Light Source (Laser or LED) – Emits concentrated UV light (typically 355nm or 365nm).
Galvanometer Scanner – Directs the UV beam precisely to create fine patterns.
Control Software – Converts designs into machine-readable paths.
UV-Sensitive Material – Either pre-coated surfaces or marked with UV-reactive ink.
3. The Marking Process
Design Input – The desired mark (text, barcode, logo) is uploaded to the machine.
Beam Focusing – The UV laser/LED is focused onto the material.
Photochemical Reaction – The UV light triggers:
Color Change (on specially treated plastics, glass, or metals).
Curing (if UV ink is applied, it hardens instantly).
Permanent Mark – The result is a high-contrast, wear-resistant mark without burns or deformation.
4. Applications
Medical Devices – Biocompatible markings on surgical tools.
Electronics – PCB serial numbers without heat damage.
Packaging – Expiry dates on bottles, food containers.
Automotive – VIN numbers on plastic parts.
