New metal screen printing technology

The wide range of metal screen printing can be used to print various kinds of logo roots, panels, signs and metal moldings. Most of them are decorated with direct printing. There is no significant difference in screen printing techniques. However, metal products are durable goods. The surface decoration requirements are higher and more durable. Therefore, the surface treatment, such as surface coating, electroplating, and anode Oxidation or mechanical hair (bristle pattern, drawing) and so on. When printing, make sure the surface is clean, so be sure to wear gloves during work. If the treated surface contains grease, fingerprints, dust, etc., it must be washed with solvents such as trichloroethylene, thinner, and gasoline. In addition, according to the surface properties of the metal, select suitable printing inks, such as amino baking paint and epoxy baking paint, and use amino and epoxy-based thermosetting inks; nitrocellulose varnish and other natural drying coatings. Solvent-evaporable or oxidative-drying inks may be used, but solvents or thinners must be used with caution to prevent damage to the paint, and a layer of varnish is added after printing to improve gloss and protect the entire surface; the metal plating surface is also Can use thermosetting ink printing, but pay attention to the difference between the thermal expansion coefficient of the plating layer and the metal, in order to control the heating temperature, to avoid the difference in expansion coefficient caused by the cracking of the coating; anodized aluminum plate will form a layer of uniform oxide layer (thick about 2 ~ 10μm), with a larger surface area, can improve the adhesion of the coating (ink), in addition, there is the performance of the adsorption of dyes, can use the proliferation of ink or dip dyeing method of making labels.

1. Screen Printing Corrosion Plaque Corrosion Plaque is a traditional signage. It is used as a grit-blasting oxide coating label for instrumentation panels, used as a corrosion and baking sign for vehicle and ship license plates, equipment numbers, and nameplates of various machine tool appliances. It is used as a comparison of industrial environments. Bad copper plated front plate for electromechanical products is used as a sign of porcelain oxide lacquer on the surface of instruments and electronic instruments, as well as high-cursor plates. The graphics on these labels were all visualized by photochemical methods using liquid photosensitive adhesives (protein gel, bone glue, gelatin, polyvinyl alcohol glue, etc.). Although this method has the advantage of small graphics and text distortion, there are many defects in the production process, such as low production efficiency, high labor intensity, and high energy consumption. The use of screen printing methods to visualize texts can increase production efficiency by several times and save a lot of auxiliary materials and energy. Below, the reader is specifically introduced to the graphic and silkscreen printing process of corrosion signs.

2. Screen printing aluminum oxidation dye sign aluminum oxidation sign, the surface is hard and smooth, wear-resistant and durable.

After the aluminum oxidation plate and the panel are closed by oxidation, there is an oxide film on the surface to make the surface hard and smooth. Screen printing with ordinary inks often has poor adhesion, which should be particularly noticeable. To solve this problem, it is necessary to first solve the problem of silk screen printing ink and operation. The use of alumina screen printing inks is the key to solve the problem of adhesion and firmness of the ink film in alumina screen printing. This kind of ink is different from general inks. It adheres firmly to aluminum plates and also has good lightfastness. It is the ideal ink for screen printed aluminum anodizing signs.

3. Screen printing convex color aluminum logo plate features concave and convex signs painted in the recess, it has good abrasion resistance, but also has a three-dimensional effect, used for mechanical nameplates and company plaques. The traditional method is to manually paint in the corroded cavity (or use a syringe needle to inject paint), and then trim it by hand to remove the edge paint. This method is not only time-consuming, inefficient, and requires operators to have skilled skills. Moreover, the signs produced are often unclear on the surface of the cards, the writing is distorted, and the quality is very unstable. Therefore, it is limited to the production of a number of small, small number of colors, quality requirements are not high, the pattern is very simple sign.

4. Screen printing sandblasting oxidation embedding paint aluminum sign silk screen sandblasting oxidation inlay paint sign process, is a traditional sign making process. The appearance of these products is silver-white, with high surface hardness and good wear resistance.

5. Screen printing wood from alumina plate water white alumina plate is a new type of sub-photon surface plate that has recently appeared in China. This sign has a milky white appearance, smooth and smooth surface, no concavity and convexity, with resistance to hot and humid, salt spray, mold resistance, but also has a strong light, abrasion resistance, resistance to organic solvents and other characteristics, suitable for frequent cleaning Machines and machines that work in harsh environments. What is even more commendable is the fact that silk screened alumina white plate has fewer production processes, high work efficiency, and basically no “three wastes”. Its consumption of manpower and energy (including water and electricity) does not exceed one-third of the traditional corrosion signs.

6. Aluminium oxidation color sign aluminum plane anodized signage is one of the varieties of signage, and it is widely used. It has beautiful, bright, high hardness, good wear resistance and other characteristics. In the past, aluminum sheet blanking, mechanical polishing, chemical polishing, and oxidation were performed; indirect screen printing, thick coating of zinc and bismuth, and alkyd varnish were used for protection printing; coloring was performed using a dyeing paste. Regardless of the screen printing or dyeing process, this process has the disadvantages of multiple materials, complicated processes, low resistance to printing, poor resolution, and high cost. Under the current conditions, it is possible to compile a set of new processes with simple processes, good quality, and high efficiency. The new process uses direct printing of non-toxic diazo-type photoresists to screen printing plates. The practice has proved that it can achieve the requirements of fast plate making, high resolution, high printing resistance, and low material consumption. In addition, the process of printing protective lacquer, dyeing, and unfinishing printing materials can be combined into one, namely self-made water-based dyeing printing materials, which can be directly dyed and color-coded one after another without the need for color cylinders. This greatly simplifies the entire process and operating procedures and enables new methods for planar oxidation dyeing signs.