In the marking process of the laser marking machine, the common quality problems and their solutions

(1) The marking pattern of the laser marking machine is not clear locally

Cause: the thickness of the molding plate is not uniform, and the molding pressure is too small. The heating temperature is too low or the machine accuracy is not high.

Solution: Check whether the thickness of the molding plate is uniform, whether the molding pressure is too small, whether the temperature is too low, and whether the machine accuracy is decreased.

Process control points: the thickness error of the moulded plate should be controlled within 0.001mm. The hardness should be maintained at 230-280N /mm. Because the hologram is moulded by applying a certain pressure to the molding roller to produce interference fringes. If the molded plate is hard

The degree is not enough, in the process of stamping, the internal stress will cause the mold plate deformation or damage.

(2) The marking pattern of the laser marking machine is dull

Cause: Generally related to heating temperature and molding pressure.

Solution: Check whether the heating temperature is too low and whether the molding pressure drops.

Process control points: The setting of molding pressure should comprehensively consider the type of molding temperature holographic material or the softening point of the coating layer. Too much pressure. The molded plate is easy to be damaged, or the holographic material is crushed; Pressure too low, molding

For the circular pressing method, the initial pressure of the pressure roller on both sides is generally about 0.08MPa, and after the molding begins, the pressure of the pressure roller is gradually increased evenly to 030~0.50MPa. The molding speed can be determined by the impression

Quality machine performance and other comprehensive regulation.

(3) The marking pattern of the laser marking machine is white

Solution: Check whether the molding speed is too slow. Whether the molding temperature is too high.

(4) The marking film of the laser marking machine

Cause: The hot pressing temperature is higher than the degradation temperature, and the viscosity of the coating is increased, which will cause the sticky plate and make the film wound on the holographic embossing roller.

Solution: Reduce the hot pressing temperature.

(5) The marking pattern of the laser marking machine is a clear piece of fuzzy cause: the temperature distribution of the hot pressing device is not uniform or the molding plate is not smooth.

Solution: Check whether the temperature distribution of the hot pressing device is uniform, and whether the molding plate is deformed or worn.

(6) The marking film of the laser marking machine has wrinkles in the horizontal (vertical) direction: improper control of the tension of unwinding or winding.

Jinan Luyue CNC Equipment Co Ltd, with 15 years of experience in production, R&D, and sales of marking machines,  recruit regional partners in North America, South America, Europe, Southeast Asia and other regions.