Laser marking machine common problems and solutions

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Release time：

2023-06-05

Laser marking machine applications are increasing year by year. The common ones are date laser marking, product information laser marking, two-dimensional code laser marking, bar code laser marking, etc. All high-grade daily consumer products of packaging anti-counterfeiting can not be separated from the laser marking machine. Because of the material, appearance and other factors, customers in the laser marking machine marking applications always encounter all kinds of problems

(1) laser marking machine logo pattern local unclear
Causes: Uneven thickness of the molded version. Molding pressure is too small. The heating temperature is too low or the precision of the machine is not high.
Solution: Check whether the thickness of the molded plate is uniform. Whether the molding pressure is too small. Whether the temperature is too low. Whether the accuracy of the machine is decreasing.
Process control points: the thickness error of the molded plate should be controlled within 0.O01mm. Hardness should be maintained at 230-280N/mm. Because the hologram is molded by applying a certain pressure to the molding roller and molded interference stripes. If the hardness of the die plate is not enough, the internal stress will deform or damage the die plate in the process of embossing.
(2) laser marking machine logo pattern dull
Cause: Generally related to heating temperature and molding pressure.
Solution: Check whether the heating temperature is too low. Whether the molding pressure is decreasing.
Process control points: the setting of the molding pressure should take into account the molding temperature, the type of holographic material or the softening point of the coating layer, the condition of the molding plate, etc. The pressure is too high molded version is easy to damage or holographic materials will be bad; pressure is too low molded image is not clear, incomplete for the round press the initial pressure of the two sides of the pressure roller is generally at about 0.08MPa after the start of the molding. Moulding speed can be adjusted according to the quality of the embossing machine performance.

(3) laser marking machine logo pattern whitening
Solution: Check whether the moulding speed is too slow. Whether the molding temperature is too high.
(4) laser marking machine logo film sticky version
Cause: The hot pressing temperature is higher than the degradation temperature, and the viscosity of the coating increases. It will cause the sticky plate and make the film wrapped in the holographic embossing roller.
Solution: reduce the hot pressing temperature.
(5) laser marking machine logo pattern a clear piece of a blurred cause: uneven temperature distribution of the hot pressing device or mold pressing plate is not flat.
Solution: Check whether the temperature distribution of the hot pressing device is uniform. Whether the molded version is deformed or worn.
(6) laser marking machine logo film horizontal (vertical) wrinkled cause: the release or winding tension control is not appropriate.
Solution: properly adjust the release tension or winding tension. Until the wrinkles are eliminated. Problems and solutions in the application.
(7) laser marking machine logo warp mark
Cause: The base of laser holographic marking is aluminum film, aluminum film has a certain degree of hardness; adhesive viscosity is not enough. This phenomenon is easy to occur in the medicine box or wine box sealing labeling.
Solution: Properly reduce the thickness of the aluminum film, thicken the adhesive layer or improve the viscosity of the adhesive. Process control points: the thickness of the adhesive should be mastered. Especially in the summer when the temperature is relatively high, the adhesive will melt and spill due to the high temperature. Resulting in printed matter scuffing.