Laser engraving, which is actually a subset of laser marking, is the technique of using lasers to engrave an object. Laser marking, on the other hand, is a broader group 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 more. The technique doesn’t involve the usage of inks, nor does 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 must be replaced regularly.
The impact of Stainless Fiber Marking Machine has been more pronounced for specially designed “laserable” materials and also for many paints. Such as laser-sensitive polymers and novel metal alloys.
The phrase laser marking is also used as 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 similar, in order that the two terms are often confused by those without knowledge or expertise in the practice.
A laser engraving machine could be thought of as three main parts: a laser, a controller, along with a surface. The laser is like a pencil – the beam emitted as a result allows the controller to trace patterns on the surface. The controller direction, intensity, speed of movement, and spread from the laser beam aimed at the top. The surface is picked to match just what the laser can act on.
There are 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 also the workpiece moves. Sometimes the workpiece moves within the Y axis and the laser inside the X axis. Another genre is for cylindrical workpieces (or flat workpieces mounted around a cylinder) in which the laser effectively traverses an excellent helix as well as on/off laser pulsing produces the required image over a raster basis. Inside the third method, both the laser and workpiece are stationary and galvo mirrors move the laser beam within the workpiece surface. Laser engravers 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 top should be on the focal plane of the laser’s optical system, and it is usually synonymous with its focal point. This aspect is usually small, perhaps under a fraction of any millimeter (depending on the optical wavelength). Only the area inside this focal point is quite a bit affected if 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 up the surface and subsequently vaporize the fabric, or perhaps the material may fracture (called “glassing” or “glassing up”) and flake off of the surface. Cutting through the paint of any metal part is usually how material is Raycus Fiber Laser Cutting Machine.
In the event the surface material is vaporized during laser engraving, ventilation with the use of blowers or a vacuum pump are typically required to remove the noxious fumes and smoke arising from this process, and then for removing of debris on the surface to allow the laser to go on engraving.
A laser can remove material very efficiently as the laser beam could be created to deliver energy for the surface in a manner which converts a high amount of the light energy into heat. The beam is extremely focused and collimated – 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 quickly. Elaborate cooling systems are essential for that laser. Alternatively, the laser beam might be pulsed to reduce the volume of excessive heating.
Different patterns may be engraved by programming the controller to traverse a specific path for that laser beam over time. The trace of the laser beam is carefully regulated to achieve a consistent removal depth of material. For example, criss-crossed paths are avoided to ensure that each etched surface is in contact with the laser just once, and so the same amount of material is taken off. The speed at which the beam moves across the material can also be considered in creating engraving patterns. Changing the intensity and spread of the beam allows more flexibility in the design. For instance, by changing the proportion of time (called “duty-cycle”) the laser is turned on during each pulse, the power shipped to the engraving surface can be controlled appropriately for that material.
Since the position of the laser is famous exactly from the controller, it is not essential to add barriers to the surface to prevent the laser from deviating from your prescribed engraving pattern. Consequently, no resistive mask is required in laser engraving. This really is primarily why this method is different from older engraving methods.
A great example of where laser engraving technologies have been adopted in to the industry norm is the production line. In this 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 on the surface being marked. This can be particularly ideal for printing dates, expiry codes, and lot numbering of products traveling along a production line. Laser marking allows materials made of plastic and glass to become marked “on the move”. The place where the marking takes place is named 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 substituted with laser engraving.
For further precise and visually decorative engravings, a laser table is used. A laser table (or “X-Y table”) is actually a sophisticated setup of equipment employed to guide the laser beam more precisely. The laser is normally fixed permanently to the side of 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 aim 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 any laser table involves the Metal Laser Marking Machine Price parallel to 1 axis from the table targeted at a mirror mounted on the end of your adjustable rail. The beam reflects off the mirror angled at 45 degrees so that the laser travels a path exactly along the size of the rail. This beam is then reflected by another mirror mounted to your movable trolley which directs the beam perpendicular for the original axis. In this particular 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
E-mail: [email protected]
Tel: (+86) 531-5557-2337