Do you know the screen printing used in metal?

The scope of screen printing used in metal is very wide. It can print all kinds of sign roots, panels, signs and metal forming products. Most of them are decorated by direct printing, and there is not much difference in screen printing skills. However, metal products are all durable goods with higher requirements for surface decoration and durability. Therefore, more surface treatment is carried out before printing, such as surface coating, electroplating, anodic oxidation or mechanical hair (travel grain, wire drawing), etc. When printing, ensure that the surface is clean, so be sure to wear gloves when working. If there are grease, fingerprints and dust stains on the treated surface, it must be removed with solvents such as trichloroethylene, thinner and gasoline.

In addition, according to the surface performance of the metal to choose the appropriate printing ink, such as amino paint and epoxy paint coating surface, to use amino and epoxy resin thermosetting ink; Nitro varnish and other natural dry coating, available solvent volatile or oxidation drying ink, but must be careful with solvents or diluents, in order to prevent damage to the paint surface, and after printing a layer of cover oil, in order to improve luster and protect the entire surface; The plating surface of the metal can also be used for thermosetting ink printing, but attention must be paid to the difference between the thermal expansion coefficient of the coating and the metal, in order to control the heating temperature, to avoid the great difference in the expansion coefficient and lead to coating cracking;Anodic oxidation of aluminum plate will form a layer of uniform gap oxide layer (about 2~10μm thick), with a large surface area, can improve the adhesion of the coating (ink), in addition, there is the ability to adsorb dyes, can be used for diffusion ink or dip-dyeing dyeing signs.

Next, we will introduce the printing of two metal signs

1. Corrosion sign is a traditional sign, species are used as the instrument panel fill paint panels, sandblasting oxidation number used for vehicle license plate, equipments and various machine tool electrical corrosion baking enamel signs nameplate, of mechanical and electronic products used in industrial environment is poor, copper plating front panels, as instruments, electronic instrument surface decorative porcelain paint signs, oxide and glossy plates, etc. All the pictures on these signs used to be made by liquid photosensitive glue (protein glue, bone glue, gelatin, polyvinyl alcohol glue, etc.) through photochemical display. Although this method has the advantage of small distortion of text and text, it has many defects such as low production efficiency, high labor intensity and high energy consumption. Screen printing can improve production efficiency several times and save a lot of auxiliary materials and energy.

2. Screen printing aluminum oxide dyeing signs, the surface is hard and smooth, wear resistant and durable. Aluminum oxidation signs, panels after oxidation closed, the surface has a layer of oxide film, so that the surface is hard and smooth. With general ink screen printing often poor adhesion, this point should be paid special attention to. To solve this problem, we must first solve the ink and operation problems of screen printing. The use of alumina screen printing ink, is the key to solve the alumina screen printing ink film adhesion firmness and other problems.This kind of ink is different from the general ink, it will be firmly attached to the aluminum plate, and also has good light resistance, is the ideal ink for screen printing aluminum anodized signs.

Maishi mainly produce screen printing mesh, if anything we can help feel free to contact with us.