Two-color plate laser engraving technology
1, two-color board
Â
The two-color board is a kind of engineering plastic specially designed for engraving composed of two or more layers of colors. The specification is generally 600X1200mm, and there are also a small number of brand specifications of 600X900mm. American ROWMARK is recognized as the best product with stable quality and complete varieties. The engraved two-color plate is commonly used for various indication signs and badges, which have the characteristics of uniform color, clear pattern and durability. In the two-color board, it can be divided into two categories of mechanical and laser, and some of the mechanical boards can also be used for laser engraving. The characteristic of the laser engraving plate is that the surface color layer is thin (<0.1mm), and the whole board is also thinner than the mechanical board (the laser board is generally 1.3mm~0.8mm, and the mechanical board is generally 1.5mm). When purchasing a two-color board, if you are not sure whether it can be used in a laser machine, you can consult the dealer first or take a small piece to test it first. If the surface of the board is very thin, it can be laser engraved, such as surface. If you have a thicker color, try carving twice.
2, carving
If you are using a laser plate, the engraving effect will be very good, with obvious contrast and clear edges. When using a mechanical board with a thin surface, the engraving effect is not much different from that of the laser board. If you look closely, the edge may not be as sharp as the laser board. Users generally do not use a mechanical plate with a thick surface. Otherwise, the laser power should be adjusted to a smaller value. The engraving can be repeated to remove the bottom surface. The final effect may not be too good. Engraved grayscale images can be designed on two-color plates with high contrast, such as black and white plates. After a large number of engravings, the two-color board itself may be somewhat deformed, and it can be heated by hand and leveled by hand.
3, cutting
Under normal circumstances, users will ask you to cut the two-color board. If you are using a laser board, you can cut it after engraving. Pay attention to the speed is not too slow, do not cut through once, it will be divided into three or four times, so that the edge of the cut material is flat and there is no trace of melting. The power should be just right when engraving, and should not be too large to avoid the appearance of melting marks. If you use a mechanical plate, you can only cut it to 50% depth, then use your hand to break it and sand the edges. If the user has a mechanical machine, it can be cut off on the mechanical machine and then moved to the laser machine for engraving.
4, clean
After engraving, use a damp cloth or alcohol to clean the surface. However, it should be noted that if the laser power is set too high during engraving, it may cause a layer of dust that is difficult to wipe off on the surface of the two-color board.
5, fill the color
If the user requirements are not high, you can use the dots to represent the different colors in the logo. If you want to paint the area to be deeper, you can use acrylic paint or alkyd enamel. Other paints may damage the surface finish of the two-color board.