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 a broader class of methods to leave marks on an object, which also includes color change as a result of chemical/molecular alteration, charring, foaming, melting, ablation, and much more. The process does not involve the usage 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 must be replaced regularly.
The impact of Fiber Laser Engraver Price has been more pronounced for specifically created “laserable” materials and also for many paints. Included in this are laser-sensitive polymers and novel metal alloys.
The phrase laser marking is also used 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 the two terms are sometimes 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 to the surface. The controller direction, intensity, speed of movement, and spread from the laser beam targeted at the outer lining. The top is picked to match exactly what the laser can act on.
You will find three main genres of engraving machines: The most typical 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 the workpiece moves. Sometimes the workpiece moves inside the Y axis and also the laser within the X axis. Another 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 required image over a raster basis. In the third method, both laser and workpiece are stationary and galvo mirrors move the laser beam over the workpiece surface. Laser engravers applying this technology can work in either raster or vector mode.
The point where the laser (the terms “laser” and “laser beam” may be used interchangeably) touches the outer lining ought to be on the focal plane of the laser’s optical system, and is also usually symbolic of its focal point. This point is usually small, perhaps under a fraction of a millimeter (depending on the optical wavelength). Merely the area inside this center point is significantly affected if the laser beam passes over the surface. The energy delivered by the laser changes the top of the material under the focal point. It may heat up the surface and subsequently vaporize the content, or maybe the material may fracture (referred to as “glassing” or “glassing up”) and flake off the surface. Cutting through the paint of a metal part is normally how material is Glass Laser Engraving Machine.
If the surface material is vaporized during laser engraving, ventilation with the use of blowers or a vacuum pump are typically necessary to eliminate the noxious fumes and smoke as a result of this process, and for removal of debris on the surface to enable the laser to carry on engraving.
A laser can remove material very efficiently because the laser beam can be created to deliver energy to the surface in a manner which converts a higher percentage of the light energy into heat. The beam is highly focused and collimated – in many 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 utilized in laser engraving may heat up quickly. Elaborate cooling systems are needed for your laser. Alternatively, the laser beam might be pulsed to reduce the amount of excessive heating.
Different patterns may be engraved by programming the controller to traverse a specific path for the laser beam with time. The trace of the laser beam is carefully regulated to achieve a regular removal depth of material. For instance, criss-crossed paths are avoided to ensure each etched surface is exposed to the laser just once, so the equivalent amount of material is taken away. The pace at which the beam moves over the material is also 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 your time (known as “duty-cycle”) the laser is turned on during each pulse, the ability shipped to the engraving surface may be controlled appropriately for the material.
Since the position of the laser is famous exactly from the controller, it is not essential to add barriers towards the surface to stop the laser from deviating from your prescribed engraving pattern. Consequently, no resistive mask is required in laser engraving. This is primarily why this method differs from older engraving methods.
A great demonstration of where laser engraving technologies have been adopted into 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 on the surface being marked. This is particularly helpful for printing dates, expiry codes, and lot numbering of items traveling along a production line. Laser marking allows materials manufactured from plastic and glass to become marked “on the move”. The place where the marking happens is called 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 utilized to guide the laser beam more precisely. The laser is normally fixed permanently aside in the table and emits light towards a couple of movable mirrors so that every point of the table surface could be swept by the laser. At the aim 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 any laser table requires the Laser Cut Machine parallel to a single axis of the table geared towards a mirror mounted on the end of the adjustable rail. The beam reflects from the mirror angled at 45 degrees so the laser travels a path exactly along the size of the rail. This beam is then reflected by another mirror mounted to some movable trolley which directs the beam perpendicular to the original axis. In this particular scheme, two levels of freedom (one vertical, then 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