Laser engraving, which is a subset of laser marking, is the concept of using lasers to engrave an object. Laser marking, on the contrary, is actually a broader category of techniques to leave marks on an object, that also includes color change due to chemical/molecular alteration, charring, foaming, melting, ablation, and more. The process does not involve the usage of inks, nor will it involve tool bits which contact the engraving surface and wear out, giving it a benefit over alternative engraving or marking technologies where inks or bit heads need to be replaced regularly.
The impact of Laser Marking Machine Manufacturers continues to be more pronounced for specifically created “laserable” materials and in addition for a few paints. These include laser-sensitive polymers and novel metal alloys.
The word laser marking is also used as being a generic term covering a wide 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 often confused by those without knowledge or experience in the practice.
A laser engraving machine may be regarded as three main parts: a laser, a controller, as well as a surface. The laser is sort of 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 top. The top is picked to complement exactly what the laser can act on.
You can find three main genres of engraving machines: The most frequent is definitely the X-Y table where, usually, the workpiece (surface) is stationary as well as the laser optics maneuver around in X and Y directions, directing the laser beam to draw in vectors. Sometimes the laser is stationary and the workpiece moves. Sometimes the workpiece moves in the Y axis as well as the laser in the X axis. Another genre is made for cylindrical workpieces (or flat workpieces mounted around a cylinder) where laser effectively traverses a great helix and also on/off laser pulsing produces the desired image on the raster basis. Within the third method, the laser and workpiece are stationary and galvo mirrors move the laser beam within the workpiece surface. Laser engravers by using this technology can be employed in either raster or vector mode.
The stage where the laser (the terms “laser” and “laser beam” may be used interchangeably) touches the top needs to be on the focal plane in the laser’s optical system, and it is usually synonymous with its focal point. This point is typically small, perhaps less than a fraction of the millimeter (depending on the optical wavelength). Just the area inside this center point 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 point of interest. It could warm up the outer lining and subsequently vaporize the content, or perhaps the material may fracture (referred to as “glassing” or “glassing up”) and flake off of the surface. Cutting from the paint of a metal part is normally how material is 30w Fiber Laser Marking Tools.
When the surface material is vaporized during laser engraving, ventilation by using blowers or even a vacuum pump are more often than not needed to take away the noxious fumes and smoke as a result of this procedure, as well as for removing of debris on the surface to enable the laser to continue engraving.
A laser can remove material very efficiently since the laser beam can be made to deliver energy to the surface in a manner which converts a very high percentage of the sunshine 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 much more than x% efficient. However, due to this efficiency, the gear found in laser engraving may warm up rather quickly. Elaborate cooling systems are needed for your laser. Alternatively, the laser beam might be pulsed to decrease the amount of excessive heating.
Different patterns can be engraved by programming the controller to traverse a certain path for your laser beam as time passes. The trace from the laser beam is carefully regulated to achieve a consistent removal depth of material. For instance, criss-crossed paths are avoided to ensure each etched surface is subjected to the laser just once, so the equivalent amount of material is taken off. The pace at which the beam moves over the material is also considered in creating engraving patterns. Changing the intensity and spread of the beam allows more flexibility in the design. As an example, by changing the proportion of time (called “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 well known exactly by the controller, it is really not necessary to add barriers towards the surface to prevent the laser from deviating from your prescribed engraving pattern. Consequently, no resistive mask is necessary in laser engraving. This can be primarily why this method is different from older engraving methods.
An excellent illustration of where laser engraving technology has been adopted in to the industry norm is definitely 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 to the surface being marked. This really is particularly ideal for printing dates, expiry codes, and lot numbering of items traveling along a production line. Laser marking allows materials made from plastic and glass to become marked “on the move”. The location where marking takes place is called a “marking laser station”, an entity often seen in packaging and bottling plants. Older, slower technologies like hot stamping and pad printing have largely been eliminated and replaced with laser engraving.
For further precise and visually decorative engravings, a laser table can be 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 generally fixed permanently to the side in the table and emits light towards a set of movable mirrors in order that every point of the table surface can be swept by the laser. At the point of engraving, the laser beam is focused via a lens on the engraving surface, allowing very precise and intricate patterns pmupgg be traced out.
An average setup of a laser table involves the Auto Feeding Co2 Cutting Machine parallel to one axis in the table geared towards a mirror mounted on the end of the adjustable rail. The beam reflects off of the mirror angled at 45 degrees in order that the laser travels a path exactly along the duration of the rail. This beam will then be reflected by another mirror mounted to a movable trolley which directs the beam perpendicular towards the original axis. In this scheme, two levels of freedom (one vertical, and something 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