Laser engraving, which is a subset of laser marking, is the technique of using lasers to engrave an object. Laser marking, on the other hand, is a broader category of ways to leave marks on an object, that also includes color change because of chemical/molecular alteration, charring, foaming, melting, ablation, and much more. The process does not involve the use of inks, nor does it involve tool bits which contact the engraving surface and wear out, giving it an edge over alternative engraving or marking technologies where inks or bit heads have to be replaced regularly.
The impact of Metal Tube Fiber Laser Cutting has become more pronounced for specifically created “laserable” materials and in addition for some paints. Included in this are laser-sensitive polymers and novel metal alloys.
The term laser marking can also be used 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 identical, so that the two terms are sometimes confused by those without knowledge or experience in the practice.
A laser engraving machine could be looked at as three main parts: a laser, a controller, along with a surface. The laser is sort of a pencil – the beam emitted from this allows the controller to trace patterns to the surface. The controller direction, intensity, speed of motion, and spread from the laser beam targeted at the outer lining. The surface is picked to fit just what the laser can act on.
You will find three main genres of engraving machines: The most common will be the X-Y table where, usually, the workpiece (surface) is stationary as well as the laser optics move around in X and Y directions, directing the laser beam to attract vectors. Sometimes the laser is stationary and also the workpiece moves. Sometimes the workpiece moves inside the Y axis and also the laser in the X axis. An additional genre is for cylindrical workpieces (or flat workpieces mounted around a cylinder) where laser effectively traverses a great helix as well as on/off laser pulsing produces the preferred image on the raster basis. Inside the third method, both laser and workpiece are stationary and galvo mirrors move the laser beam over the workpiece surface. Laser engravers by using this technology can work in either raster or vector mode.
The stage 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 is usually symbolic of its center point. This aspect is usually small, perhaps under a fraction of the millimeter (depending on the optical wavelength). Merely the area inside this centerpiece is significantly affected once the laser beam passes on the surface. The vitality delivered through the laser changes the surface of the material under the focal point. It might heat the surface and subsequently vaporize the fabric, or perhaps the material may fracture (known as “glassing” or “glassing up”) and flake off the surface. Cutting with the paint of the metal part is generally how material is Fiber Laser Engraving Machine.
When the surface material is vaporized during laser engraving, ventilation by using blowers or perhaps a vacuum pump are typically required to take away the noxious fumes and smoke as a result of this method, and for removal of debris on the surface to permit the laser to carry on engraving.
A laser can remove material very efficiently as the laser beam can be created to deliver energy towards the surface in a manner which converts a higher portion of the lighting energy into heat. The beam is highly focused and collimated – generally in most non-reflective materials like wood, plastics and enamel surfaces, the conversion of light energy to heat is more than x% efficient. However, due to this efficiency, the machine used in laser engraving may heat quickly. Elaborate cooling systems are essential for the laser. Alternatively, the laser beam may be pulsed to decrease the volume of excessive heating.
Different patterns could be engraved by programming the controller to traverse a particular path for that laser beam as time passes. The trace in the laser beam is carefully regulated to accomplish a regular removal depth of material. As an example, criss-crossed paths are avoided to ensure each etched surface is subjected to the laser just once, and so the same amount of material is taken away. The rate in which the beam moves over the material can also be considered in creating engraving patterns. Changing the intensity and spread from the beam allows more flexibility inside the design. For instance, by changing the proportion of time (called “duty-cycle”) the laser is switched on during each pulse, the power sent to the engraving surface can be controlled appropriately for the material.
Since the positioning of the laser is well known exactly by the controller, it is not essential to add barriers for the surface to stop the laser from deviating from the prescribed engraving pattern. Consequently, no resistive mask is necessary in laser engraving. This is primarily why this technique is different from older engraving methods.
A good example of where laser engraving technologies have been adopted in to the industry norm will be the production line. In this particular setup, the laser beam is directed towards a rotating or vibrating mirror. The mirror moves in a manner which might trace out numbers and letters onto the surface being marked. This can be particularly helpful for printing dates, expiry codes, and lot numbering of items traveling along a production line. Laser marking allows materials made of plastic and glass to be marked “on the move”. The location where the marking happens is called a “marking laser station”, an entity often present in packaging and bottling plants. Older, slower technologies such as hot stamping and pad printing have largely been eliminated and substituted with laser engraving.
For additional precise and visually decorative engravings, a laser table is used. A laser table (or “X-Y table”) is really a sophisticated setup of equipment used to guide the laser beam more precisely. The laser is usually fixed permanently aside of the table and emits light towards a set of movable mirrors so that every point of the table surface could be swept by the laser. At the point of engraving, the laser beam is focused through a lens at the engraving surface, allowing very precise and intricate patterns pmupgg be traced out.
An average setup of the laser table involves the Wood/Leather Laser Cutter parallel to one axis in the table geared towards a mirror mounted on the end of an adjustable rail. The beam reflects off the mirror angled at 45 degrees so that the laser travels a path exactly along the duration of the rail. This beam will then be reflected by another mirror mounted to some movable trolley which directs the beam perpendicular for the original axis. In this particular scheme, two degrees of freedom (one vertical, and one horizontal) for etching can 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