Laser engraving, which is actually a subset of laser marking, is the concept of using lasers to engrave an object. Laser marking, on the contrary, is a broader category of techniques to leave marks on an object, which also includes color change due to chemical/molecular alteration, charring, foaming, melting, ablation, and a lot more. The process doesn’t involve the use of inks, nor will it involve tool bits which contact the engraving surface and wear out, giving it an advantage over alternative engraving or marking technologies where inks or bit heads need to be replaced regularly.
The impact of Laser Engraving Metal Machine has been more pronounced for specially designed “laserable” materials as well as for many paints. These include laser-sensitive polymers and novel metal alloys.
The phrase laser marking can also be used as being a generic term covering an extensive spectrum of surfacing techniques including printing, hot-branding and laser bonding. The machines for laser engraving and laser marking are the same, so that the two terms are occasionally confused by those without knowledge or experience with the practice.
A laser engraving machine may be regarded as three main parts: a laser, a controller, and a surface. The laser is like a pencil – the beam emitted as a result allows the controller to trace patterns on the surface. The controller direction, intensity, speed of motion, and spread of the laser beam aimed at the outer lining. The top is picked to match exactly what the laser can act on.
You can find three main genres of engraving machines: The most common is the X-Y table where, usually, the workpiece (surface) is stationary and the laser optics move about in X and Y directions, directing the laser beam to attract vectors. Sometimes the laser is stationary and the workpiece moves. Sometimes the workpiece moves in the Y axis as well as the laser within the X axis. A second genre is made for cylindrical workpieces (or flat workpieces mounted around a cylinder) in which the laser effectively traverses a great helix as well as on/off laser pulsing produces the preferred image on a raster basis. Within the third method, both laser and workpiece are stationary and galvo mirrors move the laser beam on the workpiece surface. Laser engravers by using this technology can be employed in either raster or vector mode.
The point where the laser (the terms “laser” and “laser beam” may be used interchangeably) touches the surface ought to be on the focal plane from the laser’s optical system, and it is usually synonymous with its centerpiece. This point is normally small, perhaps less than a fraction of the millimeter (depending on the optical wavelength). Only the area inside this focal point is quite a bit affected once the laser beam passes on the surface. The energy delivered through the laser changes the top of the material under the point of interest. It might heat up the top and subsequently vaporize the material, or perhaps the material may fracture (called “glassing” or “glassing up”) and flake off of the surface. Cutting from the paint of a metal part is generally how material is Marking Machine For Metal.
If the surface material is vaporized during laser engraving, ventilation by using blowers or a vacuum pump are typically required to eliminate the noxious fumes and smoke as a result of this process, and for removing of debris on the surface to permit the laser to carry on engraving.
A laser can remove material very efficiently as the laser beam could be designed to deliver energy to the surface in a manner which converts a very high percentage of the light energy into heat. The beam is extremely focused and collimated – generally in most non-reflective materials like wood, plastics and enamel surfaces, the conversion of light energy to heat is much more than x% efficient. However, for this reason efficiency, the machine found in laser engraving may heat up rather quickly. Elaborate cooling systems are needed for your laser. Alternatively, the laser beam may be pulsed to reduce the amount of excessive heating.
Different patterns can be engraved by programming the controller to traverse a specific path for your laser beam over time. The trace from the laser beam is carefully regulated to attain a consistent removal depth of material. For example, criss-crossed paths are avoided to ensure that each etched surface is subjected to the laser just once, therefore the equivalent amount of material is removed. The rate in which the beam moves across the material is also considered in creating engraving patterns. Changing the intensity and spread in the beam allows more flexibility inside the design. As an example, by changing the proportion of time (referred to as “duty-cycle”) the laser is switched on during each pulse, the ability shipped to the engraving surface can be controlled appropriately for that material.
Since the position of the laser is famous exactly by the controller, it is really not essential to add barriers towards the surface to avoid the laser from deviating through the prescribed engraving pattern. As a result, no resistive mask is required in laser engraving. This can be primarily why this method is different from older engraving methods.
An excellent example of where laser engraving technologies have been adopted to the industry norm is definitely the production line. In this setup, the laser beam is directed towards a rotating or vibrating mirror. The mirror moves in a manner which may trace out numbers and letters to the surface being marked. This is particularly ideal for printing dates, expiry codes, and lot numbering of products traveling along a production line. Laser marking allows materials made from plastic and glass to become marked “on the move”. The area where marking happens is named a “marking laser station”, an entity often present in packaging and bottling plants. Older, slower technologies like hot stamping and pad printing have largely been eliminated and substituted for laser engraving.
For further precise and visually decorative engravings, a laser table is used. A laser table (or “X-Y table”) is a sophisticated setup of equipment used to guide the laser beam more precisely. The laser is normally fixed permanently to the side in the table and emits light towards a couple of movable mirrors in order that every point of the table surface could be swept through the laser. At the aim of engraving, the laser beam is focused by way of a lens in the engraving surface, allowing very precise and intricate patterns pmupgg be traced out.
An average setup of the laser table necessitates the 100w Laser Cutting Machine parallel to a single axis from the table aimed at a mirror mounted on the end of an adjustable rail. The beam reflects off the mirror angled at 45 degrees in order that the laser travels a path exactly along the size of the rail. This beam will then be reflected by another mirror mounted to your movable trolley which directs the beam perpendicular towards the original axis. In this particular scheme, two levels of freedom (one vertical, and one horizontal) for etching could be represented.
Jinan MORN Technology Co., Ltd. (MORN GROUP) is a leading laser machine manufacturers and exporter in China. We are specialized in fiber laser cutting machine and fiber laser marking machine with 10 years experience.
Jinan MORN Technology CO., Ltd.
Address:13F, Building 5, Qisheng Mansion,Xinluo Street,High-Tech Zone, Jinan, China, 250101
E-mail: [email protected]
Tel: (+86) 531-5557-2337