At present, many plastic products, including various machine shells and accessories and automobile interior trim parts, need to be marked with product trademarks, specifications, materials used, manufacturers, dates and other records, which are required to be clear, firm and durable and will not disappear under the action of mechanical, chemical and physical factors. Therefore, the laser marking machine is particularly prominent in the marking of plastic products. Why use laser marking machine to mark plastic products?
Will laser marking machines be preferred for marking plastic products?
Due to economic reasons, direct molding, embossing and hot embossing are widely used in China. Inkjet printing has increased (especially in pipe production line), and laser marking methods are rare. Laser marking method has the advantages of no ink and solvent, good environmental adaptability, flexible control of marking shape through computer, and large marking data density. Its application range is expanding, especially in automotive interior parts.
With the expansion of the application scope of laser marking method and the maturity of technology, the cost is decreasing. A large number of plastic products need to be marked. As a new generation of marking method, laser marking method has broad development prospects in China's plastic products industry.
The technical defects of laser marking machine marking plastic products should continue to be improved.
Laser marking machine has some defects in marking plastic products. In order to clearly mark plastic by laser, the material needs to be properly modified with special additives. In order to be used for laser marking, plastics must absorb a certain amount of laser beam. From the macro level, most plastics only absorb ultraviolet and far infrared rays in the electromagnetic spectrum. However, by using additives, fillers and pigments, the absorption characteristics of materials can be changed and their ability to absorb laser beams in near-infrared or visible green light band can be improved. In this way, the processing speed is faster and the contrast is better.
What are the processing methods of laser marking machine marked on plastic products?
When processing plastic products, laser marking machine is generally used for surface marking. Generally speaking, there are four main methods for marking on plastics.
1. Discoloration method: which changes the color of a material only below its surface.
2. Carbonization method: which is removed by melting and evaporation in the surface area of the material.
3. Bubbling method: gas bubbles are incorporated into the material to expand and produce relief effect. Light will produce diffraction characteristics on the surface of the modified material and produce light / dark contrast effect.
4. Ablation method: according to the required marking content, the surface material is partially removed to leave a mark with concave convex effect.
Therefore, Riselaser suggests that the majority of businesses are more inclined to use laser marking machines when further processing plastic products, because not only do the marks have no quality problems, but also they will not have any impact on the plastic products themselves.
