Laser engraving, which is a subset of laser marking, is the technique of using lasers to engrave an object. Laser marking, on the contrary, is actually a broader class 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 doesn’t involve the usage 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 must be replaced regularly.
The impact of Laser Marking Aluminum has been more pronounced for specially engineered “laserable” materials and in addition for a few paints. Such as laser-sensitive polymers and novel metal alloys.
The word laser marking is also 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, in order that the two terms are occasionally confused by those without knowledge or experience with the practice.
A laser engraving machine could be regarded as three main parts: a laser, a controller, and a surface. The laser is sort of a pencil – the beam emitted from this allows the controller to trace patterns onto the surface. The controller direction, intensity, speed of motion, and spread in the laser beam aimed at the surface. The surface is picked to fit just what the laser can act on.
There are three main genres of engraving machines: The most common is definitely the X-Y table where, usually, the workpiece (surface) is stationary and the laser optics move 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 perfect 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 desired image on a raster basis. In the third method, the laser and workpiece are stationary and galvo mirrors move the laser beam on 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” can be utilized interchangeably) touches the outer lining ought to be on the focal plane of the laser’s optical system, and is usually symbolic of its centerpiece. This point is normally small, perhaps less than a fraction of any millimeter (depending on the optical wavelength). Merely the area inside this focal point is quite a bit affected when the laser beam passes on the surface. The energy delivered from the laser changes the top of the material under the point of interest. It could warm up the top and subsequently vaporize the material, or perhaps the material may fracture (called “glassing” or “glassing up”) and flake off the surface. Cutting from the paint of the metal part is normally how material is Laser Fiber Metal Cutting Machine.
In the event the surface material is vaporized during laser engraving, ventilation by using blowers or perhaps a vacuum pump are almost always needed to eliminate the noxious fumes and smoke as a result of this procedure, and then for elimination of debris on the surface to permit the laser to carry on engraving.
A laser can remove material very efficiently since the laser beam may be designed to deliver energy for the surface in a manner which converts a high percentage of the light energy into heat. The beam is very 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, because of this efficiency, the gear found in laser engraving may heat up quickly. Elaborate cooling systems are needed for your laser. Alternatively, the laser beam may be pulsed to decrease the volume of excessive heating.
Different patterns may be engraved by programming the controller to traverse a specific path for your laser beam with time. The trace from the laser beam is carefully regulated to attain a consistent removal depth of material. As an example, criss-crossed paths are avoided to ensure that each etched surface is subjected to the laser just once, so the equivalent amount of material is taken away. The speed in 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 inside the design. For instance, by changing the proportion of energy (referred to as “duty-cycle”) the laser is turned on during each pulse, the energy delivered to the engraving surface may be controlled appropriately for your material.
Since the position of the laser is known exactly by the controller, it is not essential to add barriers for the surface to stop the laser from deviating through the prescribed engraving pattern. Consequently, no resistive mask is needed in laser engraving. This can be primarily why this procedure differs from older engraving methods.
A great demonstration of where laser engraving technology has been adopted 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 manufactured from plastic and glass to get marked “on the move”. The area in which the marking takes place is known as “marking laser station”, an entity often found in packaging and bottling plants. Older, slower technologies like hot stamping and pad printing have largely been eliminated and substituted with 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 to ensure that every point of the table surface can be swept by the laser. At the aim of engraving, the laser beam is focused through a lens at the engraving surface, allowing very precise and intricate patterns pmupgg be traced out.
A typical setup of the laser table involves the Laser Marking For Jewelry parallel to a single axis in 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 length of the rail. This beam will be reflected by another mirror mounted to your movable trolley which directs the beam perpendicular to the original axis. Within this scheme, two degrees of freedom (one vertical, and something 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
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Tel: (+86) 531-5557-2337