The non-woven fabric is soft, thin, sticky, and easy to deform under stress. According to the design, we need to buy a laser cutting machine for cutting. However, in practical application, the edge of the fabric will always produce a slight phenomenon of yellowing (or even black) and hardening. After investigation, it is found that ultrasonic cutting can avoid this kind of situation. What is the difference between laser cutting and ultrasonic cutting?
1. The principle is different
(1) Principle of ultrasonic cutting
When the ultrasonic technology is used for cutting, the front and back vibration generated by the ultrasonic vibrator installed behind the spindle is transmitted to the outer circle of the grinding wheel blade through the base of the spindle and the grinding wheel blade, and converted into the expansion movement in the radial direction. By this way, the ideal vibration direction for ultrasonic machining can be obtained.
(2) Principle of laser cutting
The principle of laser cutting laser cutting is to use focused high power density laser beam to irradiate the workpiece to make the irradiated material melt, vaporize, ablate or reach the ignition point quickly. At the same time, with the help of high-speed air flow coaxial with the beam to blow away the molten material, the workpiece can be cut. Laser cutting is one of the thermal cutting methods.
2. Different characteristics
(1) Characteristics of ultrasonic cutting
Ultrasonic cutting has the advantages of smooth and reliable incision, accurate cutting edge, no deformation, no edge warping, fuzzing, wire drawing, wrinkle and so on. The avoidable "laser cutting machine" has the disadvantages of rough cutting edge, focal edge, pilling and so on. However, the automation of ultrasonic cutting machine is more difficult than that of laser cutting machine, so the efficiency of laser cutting is higher than that of ultrasonic cutting.
(2) Characteristics of laser cutting
As a new processing method, laser processing has been widely used in leather, textile and garment industry because of its advantages of precision, fast, simple operation and high degree of automation. Compared with the traditional laser cutting machine, the laser cutting machine has the advantages of low operation speed, low cost and high efficiency. The non-woven fabric cut by laser machine has the advantages of no yellowing, automatic edge closing, no edge scattering, no deformation, no hardening, uniform and accurate size, can cut any complex shape, high efficiency and low cost, and can cut any lace of any shape and size with computer graphics design. Fast development speed: due to the combination of laser and computer technology, as long as users design on the computer, they can realize laser engraving output, and can change engraving at any time. They can design and produce products at the same time.
