Laser engraving, which is a subset of laser marking, is the concept of using lasers to engrave an object. Laser marking, on the other hand, is actually a broader class of methods to leave marks on an object, which also includes color change due to chemical/molecular alteration, charring, foaming, melting, ablation, and much more. The procedure does not involve using 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 Cheap Fiber Laser Engraver has been more pronounced for specially designed “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 as 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 the same, so the two terms are sometimes confused by those without knowledge or experience with the practice.
A laser engraving machine can 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 on the surface. The controller direction, intensity, speed of movement, and spread in the laser beam geared towards the surface. The outer lining is picked to match exactly what the laser can act on.
You will find three main genres of engraving machines: The most common is 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 vectors. Sometimes the laser is stationary and also 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 the laser effectively traverses a great helix as well as on/off laser pulsing produces the required image over a raster basis. Within the third method, the laser and workpiece are stationary and galvo mirrors move the laser beam on the workpiece surface. Laser engravers applying this technology can work in either raster or vector mode.
The stage where the laser (the terms “laser” and “laser beam” can be utilized interchangeably) touches the top needs to be on the focal plane from the laser’s optical system, and it is usually symbolic of its centerpiece. This time is typically small, perhaps under a fraction of the millimeter (depending on the optical wavelength). Just the area inside this center point is quite a bit affected when the laser beam passes within the surface. The energy delivered from the laser changes the surface of the material under the focal point. It could heat the surface and subsequently vaporize the material, or maybe the material may fracture (referred to as “glassing” or “glassing up”) and flake off the surface. Cutting with the paint of the metal part is normally how material is Fiber Laser Cuting Machine.
When the surface material is vaporized during laser engraving, ventilation through the use of blowers or even a vacuum pump are almost always necessary to eliminate the noxious fumes and smoke as a result of this procedure, and for removing of debris on the surface to permit the laser to go on engraving.
A laser can remove material very efficiently because the laser beam can be created to deliver energy towards the surface in a manner which converts a very high percentage of the light energy into heat. The beam is highly focused and collimated – in most non-reflective materials like wood, plastics and enamel surfaces, the conversion of light energy to heat is a lot more than x% efficient. However, because of this efficiency, the equipment found in laser engraving may heat rather quickly. Elaborate cooling systems are needed for the laser. Alternatively, the laser beam might be pulsed to reduce the quantity of excessive heating.
Different patterns could be engraved by programming the controller to traverse a particular path for the laser beam with time. The trace in the laser beam is carefully regulated to attain a regular removal depth of material. For instance, criss-crossed paths are avoided to ensure that each etched surface is subjected to the laser just once, so the same amount of material is taken away. The speed at which the beam moves throughout the material can also be considered in creating engraving patterns. Changing the intensity and spread from the beam allows more flexibility within the design. For instance, by changing the proportion of energy (referred to as “duty-cycle”) the laser is switched on during each pulse, the ability sent to the engraving surface may be controlled appropriately for that material.
Since the position of the laser is famous exactly by the controller, it is really not required to add barriers towards the surface to stop the laser from deviating from your prescribed engraving pattern. As a result, no resistive mask is required in laser engraving. This is primarily why this method differs from older engraving methods.
A good demonstration of where laser engraving technology has 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 may trace out numbers and letters to the surface being marked. This can be particularly helpful for printing dates, expiry codes, and lot numbering of merchandise traveling along a production line. Laser marking allows materials made from plastic and glass to get marked “on the move”. The place where the marking happens 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 phased out and replaced with laser engraving.
For more precise and visually decorative engravings, a laser table can be used. A laser table (or “X-Y table”) is actually a sophisticated setup of equipment used to guide the laser beam more precisely. The laser is generally fixed permanently to the side from the table and emits light towards a couple of movable mirrors to ensure that every reason for the table surface may be swept from the laser. At the purpose 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.
A normal setup of the laser table necessitates the Marble And Stone Etching Machine parallel to a single axis of the table targeted at a mirror mounted on the end of the adjustable rail. The beam reflects from 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 particular scheme, two degrees of freedom (one vertical, then 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