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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 wastesâ€. 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.
7. High-gloss three-dimensional relief aluminum plate With the continuous development of production technology, people's physical and spiritual living standards, people not only have higher and higher requirements for the function of the product, but also put forward higher requirements for the product's modeling and performance. . In particular, with the development of the domestic and foreign market economy and the continuous expansion of foreign trade, people's demands for product functions and quality are increasing. In order to improve the market competitiveness of products, high-end three-dimensional relief signs have been widely used.
8. Screen printing plate cards are a product produced by many signage factories. The plaque is mainly made of metal materials. It requires solemn, obvious, and decorative qualities. Among traditional metal plaques, square plaques, especially brass, corrosion, and black lacquer, are the most common. With the constant change of people's aesthetic point of view, the gradual development of the commodity economy also has new and different requirements for the quality of the plaque. As the sign industry introduced screen printing technology, it not only promoted the development of screen printing technology, but also provided technical means for the sign industry to develop new products. Silk screen printing new type electroplating plaques is the product of the combination of sign plating and screen printing. Its basic method is to make clear patterns on the copper plate by silk screen printing, to protect and cover the non-graphic areas with the ink layer, and to conduct electroplating of the copper, nickel, and chromium systems on the silver-silvered part of the pattern, and then perform mechanical shaping and protection processing.
9. Imitation Metal Etch Screenprint Imitation metal etched printed products have a visual metal etching effect. In order to achieve the above effect, the surface of the substrate should have a mirror gloss. The substrates were printed on the substrate with clear ink to form an ink coating with irregularities to form a frosted glass-like rough surface, and a combination of rough surfaces with sharp contrast resulted in a concave printed surface and a convex printing effect on the mirror surface. The stronger the contrast, the better the imitation etching effect. The effect of the unevenness is proportional to the thickness of the ink coating. The ink contains a high solid content, so if you use a low-mesh printing plate, the effect will be better. In this technique, a gel ink of propylene emulsion (solids content 50%) was initially used, and after it was dried, a heat treatment at 180°C was performed. Therefore, substrates are limited to heat-resistant metals and glass, and hard plastics and papers cannot be used. Because of the use of high-viscosity gel inks such as acrylic emulsions and the temperature during operation, the stability of the ink viscosity is extremely poor, and the quality of the product fluctuates greatly. Since UV drying inks have been used in screen printing, there has been great flexibility in printing processes and techniques. The UV ink is 100% curing type, and the ink can be hardened by ultraviolet irradiation for 3 to 5 seconds, during which the surface temperature is about 100°C. If a water-cooled UV irradiator is used, the temperature can be reduced to about 60°C, so the type of substrates can also be increased. The aluminum foil with mirror gloss, vapor deposition paper, vaporized vinyl chloride film, and evaporated polyester film can be used. Print on other materials.
10. Silk screen conical dial silk screen conical dial method: First, the graphics will be printed on the transfer rubber, and then the conical parts will be mounted on a special self-made fixture, and then rolled from the transfer rubber, so that the graphic Transfer to a conical part.
11. Imitation Porcelain Oxidation Signs Imitation Porcelain Anodized Signs are glazed on the surface and have a soft luster. They have good resistance properties, high hardness and wear resistance, good thermal insulation and electrical insulation, good hiding power, and The ideal adsorption capacity is the decoration of instrumentation, especially high-end machines. However, during the production process, chromium-containing gases escape, so the operating equipment should be equipped with good ventilation and ventilation equipment to avoid poisoning. The surface pretreatment method of the imitation porcelain oxidation sign is basically the same as that of the screen printing sandblast oxidation embedding paint sign, except that the imitation porcelain oxidation corrosion sign generally does not need chemical polishing but direct oxidation. Imitation porcelain oxidation corrosion signs, imitation porcelain oxidation dye signs, and imitation porcelain oxide print signs are generally punched prior to oxidation. The process of oxidizing the imitation porcelain oxidation oxidation sign is the same as that of the sandblasted oxidation embedding paint. The imitation ceramic oxidation dyeing sign process is the same as the screen printed aluminum oxidation color sign.
Talking about: printing and dyeing 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.