Application and Popularization of Laser Engraving Plate Making Technology (4)

â–  Laser engraving can improve work efficiency. Manually engrave printing plates for up to 1-2 sets of printing plates a day, laser engraving can produce at least 5-10 sets a day, improve the efficiency of more than 5 times, completely changed the status of the printing of equal editions, and ensured the delivery time.

â–  High quality laser engraving. The laser engraving has a carving continuity and a 0.3mm slope, and the engraving publication face text and slope are very uniform. Hand-engraving is a one-size-fits-in-one moment. There are intermittent pauses, and the layout text and slope cannot be even, and the printing effect is directly affected. The larger the layout, the more serious the bending and watermark phenomenon at the standstill, and the general difference between the two printing effects is about twelve lines.

â–  The cost of laser engraving is low. In the Pearl River Delta region laser engraving version 0.38 yuan / in2, hand-carved version 0.48 yuan / in2, resin version. 1.25 yuan/in2:. In the case of quality assurance, the lower the cost, the better, and laser engraving can adapt to this requirement.

Dongguan Yueming Laser Technology Co., Ltd. is a company engaged in laser engraving production earlier in the country. The company started R&D in 1999 and then started to use it in the factories near Dongguan. The company promptly solved the problem and continuously improved it, finally pushing the product into the market in 2001.

At present, Dongguan City Yueming Laser Technology Co., Ltd. has almost 2,000 manufacturers in use throughout the country, and some of these larger companies are buying 3-5 units at a time. Many large companies such as Lijia International, Yongfengyu, Shenzhen Yuyu, Yihe Paper Shenzhen, Dongguan Ruicheng, and Dongguan Huiyuan have all become loyal customers of Yueming Laser.

As the leaders of Dongguan Yueming Laser Technology Co., Ltd. came from the carton factory, they felt that the structure of the printing plate was unreasonable during the operation of the carton factory. It was either the most high-grade resin plate or the low-grade hand-carved plate. Lack of affordable mid-range products. For the carton factory, regardless of the number of small orders, for example, only 10 high-end boxes, but also use the resin version, resulting in higher plate-making costs than the purchase price, and once the orders, they must meet customer quality requirements, This situation has caused many carton manufacturers headaches. Therefore, after careful consideration of practical issues, the leadership of the company started to develop the concept of mid-range products. Afterwards, the company was inspired by the carving machine of the carved and secret chapter and thought that it would be expanded to the engraving industry.

It is worth noting that Yueming Lasers has repeatedly stressed that it does not advocate 100% replacement of resin plates with laser engraving machines. For example, for overprinting, superimposition, and multicolor overprinting, the use of lasers will be less effective. Because the rubber version is relatively low-grade, after the laser is used, if the top of each dot is viewed with a microscope, it will show irregular shapes such as triangles, hexagons, and polygons. So if you want to print an apple, it may come out after the shape of the apple, but it is the color of the eggplant, the overlay is not very uniform. Therefore, it is best not to use the absolute high-end products. 100% alternative resin version. It should be said that although the accuracy of the laser machine engraving far exceeds the accuracy, but due to the rubber plate version is too low, so now our country's rubber version can not reach the overlapping color printing effect.

In recent years, the new machine launched by Dongguan Yueming Laser Technology Co., Ltd. has improved the quick hooking function and the camera positioning system, which has increased the engraving speed by more than 10 times on the original machine, positioning more accurately, and the relevant process is more perfect and mature. At the same time, the company adopts the sales model of the national direct sales to ensure that the most intuitive feedback to the technical department in the first time, to quickly solve the problem.

(1) Create the highest domestic engraving speed

In the laser equipment for corrugated carton industry, the new equipment of Dongguan Yueming Laser Technology Co., Ltd. adopts the latest DSP technology to build the main control board, and uses the German imported motor, which can reach 60m/min in engraving speed. This is the highest speed in the domestic industry, and it is close to the engraving speed of similar foreign products. The engraving machine adopts the current mainstream USB interface, plug and play, realizes a unique function in the industry where a computer controls multiple engraving machines, and greatly saves user investment. In addition, the machine also has a variety of advantages such as fast download of job data and no computer occupation during engraving work. And both have automatic memory function. When the user wants to mass-produce, as long as the graphics are input to the engraving machine, it can be completely off-line (away from the computer) batch engraving. For batch engraving users, no matter how many engraving machines, only one computer can work.

(2) Intensify the development of software engineering

Yueming laser equipment also has obvious advantages in carving effect. For the grade function that seems to be very important to the user, the slope of the Yueming laser also appears to be flexible and can be freely adjusted from OmmN3mm. If the user is not satisfied with the effect, simply modify the parameters to complete. Its device's top straight edge adjustable function is also unique in the industry. In addition, computer software is also a very important part of the user. It is understood that Yueming Laser has invested a lot in software engineering and has set up a software development project team to continuously develop and upgrade engraving software. According to the Yueming laser engineering personnel introduction, Yueming software can be directly on the computer in accordance with the needs of the site will be various types of parameters: edge, Yang engraved, invasive, depth, speed, regional output, whether with slope engraving and slope technical parameters According to the need to define a once output, output at the same time the computer can work offline, the user can also perform other designs at the same time.

(3) Three major technologies to achieve grade function

Comparing the laser-engraved rubber plate without grade function with the flexible resin plate, the former is inadequacies in that the relatively slender places such as small characters, bar codes, and thin fonts are easy to invert when printing, resulting in a significant drop in the printing quality here. The reason for the above-mentioned effect is that the laser knife is always perpendicular to the layout plane during the processing, and the light knife power is constant. In order to avoid the above-mentioned situation, the processing result must be in the shape of a slope (such as the left figure). The key to the technical conditions for implementing the gradient function is control technology, software technology and laser power technology. That is, the computer graphics must perform slope calculation, and the control board controls the operation result of the digital laser power to change the laser power to achieve the gradient function. The Yueming laser equipment precisely uses these technologies to avoid the above problems.

(Author/Wang Hao)

Corrugated Carton, July 2005 issue