The mechanism for producing electromagnetic radiation as light or visible light via the stimulated emission process is known as LASER.Light Amplification by Stimulated Emission of Radiation, or laser, is an acronym for Light Amplification by Stimulated Emission of Radiation.
Because of the increasing number of industries and the fierce competition among them, laser systems are now being used for a variety of industrial applications such as cutting, marking, stamping, embossing, and engraving.The unique mix of speed, permanence, and the flexibility of computer control distinguishes laser marking system from other forms of marking.A PCI interface card is needed to access the software for the laser marking equipment.
Lasers used for marking are:
Excimer Lasers – UV laser wavelengths of 157 nm, 193 nm, 248 nm, 308 nm, and 351 nm are available.It is mostly used for Inkjet Nozzle Drilling, Marking Eye Glasses, and other similar applications.When properly constructed, YAG lasers are frequently utilised as the base platform for producing other wavelengths.Infrared is the most versatile wavelength (1064nm).A range of materials, including metals, ceramics, composites, and some polymers, are marked with this wavelength.
Different types of processes involved in laser marking systems are
For a contrasting mark, surface annealing will pull carbon and/or oxides from the base material.With little or no penetration, the marking beam will produce a sharp contrasting line to the surrounding region.This is ideal for applications that require a smooth, unbroken surface with good contrast.Surface annealing is mostly employed in medical implants, bearings, and tooling.
Surface etching is the ability to change the surface finish of metals to alter reflectivity and enhance contrast.
This is one of the most regularly used laser marking techniques, with a penetrating depth of less than 0.0001″ in most cases.
Ablating is a technique for creating contrast without causing damage to the base material. It is commonly used on anodized aluminium, backlit buttons, and painted steel.
Different laser characteristics such as marking speed, pulse frequency, power, and focus are used to manage heat in this process.It’s mostly used on particular alloys, resulting in colour differences.
The desired depth is created by vaporising the base material in this way.This type of marking is identical to surface etching, and it is commonly employed at depths of 0.0001″ to 0.005″.The depth of the mark will deepen as you make more passes.
In the plastics industry, the specialty marking system is widely used.Heat or coupling with a wavelength can trigger a chemical shift in some plastics, resulting in a change in contrast.To achieve varied colours, additives can be used with most polymers.Product traceability is an example of specialty marking.visit more