Electrochemical aluminum bottle cover hot stamping technology explain (2)

3. Selection of hot stamping materials and equipment

Hot stamping materials and hot stamping equipment are the two most critical factors affecting the stamping effect.

1 Hot Stamping Material

Hot stamping material is anodized aluminum. There are many kinds of galvanized aluminum on the market today, including ceramic anodized aluminum and paper anodized aluminum. Glass electro-aluminum, etc.; complex grades, both domestic aluminum, real estate in Shanghai, Zhejiang, Fujian, and the United States. Japan-made, German-made imported aluminum, and their respective advantages and disadvantages. Here we mainly discuss paper aluminum.

The hot stamping adaptability of anodized aluminum includes surface finish, brightness, sharpness, hot stamping adaptability to graphic and small texts, surface flying gold and flash edge problems, etc., depending on the level of printed materials, packaging products, and anodized aluminum. The choice of price and hot stamping trade-offs.

2 Hot stamping equipment

Hot stamping equipment is widely used in China is a hand-type hot stamping machine, the main hot stamping requirements are not very high packaging products. It has low cost. Small footprint, easy operation, strong hot stamping advantages, but the hot stamping of high precision products, the error is larger, higher reject rate. If you have a hot box, most printing companies in China choose Bobst Hot Stamping Machine. The hot stamping accuracy is very high, and the control of hot stamping temperature, pressure and speed is better than other hot stamping machines. At present, some domestic hot stamping machines are also highly accurate and the price is much lower than that of imported high-end equipment.

Hot printing

After printing, hot stamping is a top technology that is used in cigarette pack printing. Its stereoscopic effect is beyond the reach of other technologies. After the hot printing, the large area laser electro-aluminum is generally stamped on the spot color ink, and then the UV ink is printed on the electro-aluminum. Its printing materials. Printing inks, printing equipment, and printers are highly demanding. The following points should be noted in this process:

1 Select an electro-aluminum with a surface tension of (4.0-4.6) x 10-2N/m to ensure that the ink has good adhesion.

2 During the hot stamping process, it should be noted that hot stamping is not allowed to have a paste version, reverse pulling, hot stamping and other phenomena. Otherwise, the galvanized aluminum stamped on the second printing will fall off and accumulate on the blanket, seriously affecting product quality and production efficiency.

3 comprehensive consideration of printing, hot stamping, hot printing between the three appropriate control shop environment temperature, humidity, as far as possible to avoid the cause of human factors reported.

4 When designing, it should be noted whether hollowing or separate hot stamping can be used in large-area hot stamping to reduce the difficulty of hot stamping. (Finish)