Laser engraving is based on numerical control technology, and the laser is the processing medium. The physical modification of the processed material instantaneously melted and vaporized under laser irradiation to achieve the purpose of processing. Laser processing characteristics: no contact with the surface of the material, unaffected by mechanical movement, the surface will not be deformed, and generally do not need to be fixed.
Not affected by the elasticity and flexibility of the material, it is convenient to process soft materials. The processing precision is high, the speed is fast, and the application field is wide.
Laser engraving directly engraving copper plates has always been considered technically infeasible, but lasers can directly engrave zinc. Swiss MDC company has achieved laser direct engraving through the improvement of plate making process. A thin layer of nickel is first electroplated on the copper roller, then copper is plated on the surface, and then a layer of zinc is plated.
This layer of zinc can absorb the laser energy and evaporate, and then the copper underneath it evaporates, forming an ink-carrying network. After engraving, like other engraving rollers, a layer of hard chromium is finally plated on the roller.
Laser fiber engraving machine:
With the rapid development of optoelectronic technology, the application range of laser engraving technology is becoming wider and wider, and the requirements for engraving accuracy are getting higher and higher. The four most fundamental factors that affect laser engraving are engraving speed, laser power, engraving accuracy, and materials.
To achieve a certain engraving effect on a specific material, a laser with certain energy is required. This energy should be regarded as the laser energy absorbed by the material=laser power/engraving speed. Simply speaking, to increase the laser energy absorbed by the material, the laser power should be increased or the engraving speed should be reduced.
As for the final method to be used, it depends on the material and the final engraving effect. Generally speaking, users will avoid reducing speed, because that will reduce production efficiency. In fact, it is not only the speed of engraving that affects the efficiency of engraving, but the accuracy of engraving also has a great impact on it.
Dot-matrix engraving resembles high-definition dot-matrix printing. The laser head swings left and right to engrave a line consisting of a series of dots each time. And then the laser head moves up and down to engrave multiple lines at the same time, and finally constitutes a full-page image or text.
The scanned graphics, text, and vectorized graphics can all be engraved by dot matrix. Unlike dot-matrix engraving, vector cutting is performed on the outer contour of the graphic. We usually use this mode for penetrating cutting on wood, acrylic, paper, and other materials, as well as marking on the surface of a variety of materials.
Engraving speed refers to the moving speed of the laser head, usually expressed in IPS (inch/second), high speed brings high production efficiency. Speed is also used to control the depth of cutting. For a specific laser intensity, the slower the speed, the greater the depth of cutting or engraving. You can use the panel of the engraving machine to adjust the speed or use the computer’s print driver to adjust. In the range of 1% to 100%, the adjustment range is 1%. ,
Engraving intensity refers to the intensity of the laser that hits the surface of the material. For a specific engraving speed, the greater the intensity, the greater the depth of cutting or engraving. The greater the intensity, the greater the speed and the deeper the cutting depth. Click here.
The size of the laser beam spot can be adjusted with lenses with different focal lengths. A lens with a small spot is used for high-resolution engraving. A lens with a large spot is used for lower resolution engraving. But it is the best choice for vector cutting. The standard configuration of the new device is a 2.0-inch lens. The spot size is in the middle, which is suitable for various occasions.