How many types of roller coating methods are there? What are their characteristics and uses?

The method of mechanically applying paint using rollers or rollers is called roller coating. There are two methods of roller coating: One is manual roller coating, and the other is mechanical roller coating. Manual roller coating uses a roller made of wool felt or other porous adsorbent materials (its shape is similar to the push roller of a mimeograph machine). During construction, the roller is first rolled on a flat plate with paint liquid and applied to the object to be coated with slight force. This method is suitable for large-area painting of indoor building walls and ship hull decks. Its mechanical roller coating is suitable for coating on flat surfaces such as thin plates (such as tinplate, etc.), fabrics, paper, plastic films, silicon steel sheets and other metal coils. The roller coating machine consists of a belt roller, a transfer roller, a paint roller and an impression roller. During construction, the paint is put into the paint roller container. When the belt roller rotates, the paint is smeared on the roller. The transfer roller is used to transfer the paint to the paint roller. The plate to be rolled is fed into the roller coating machine with a roller, and the paint roller rolls the paint onto the flat surface. It can be coated with different or the same paint to have various artistic patterns on one side or both sides. The biggest feature of roller coating is that it can use high-viscosity coatings with high solid content. The coating film is thick and plump, and the coating quality is good. It is conducive to mechanized automatic production, has high production efficiency and has less environmental pollution. However, it is only limited to flat coating, which limits its application. A new type of environmentally friendly steel glaze paint has the functions of surface decoration, protection, modification and renovation - environmentally friendly multi-functional steel glaze paint has recently been introduced to the market by Shandong Province. This product is a liquid consistency paint developed using polymer materials and a temperature-rise catalytic process. It is as hard as steel. After drying, it looks like fired enamel. It feels smooth and delicate, with a soft and even color. The coating film is full and tough. It has significant wear-resistance and dirt-resistance. It will not age and fall off after being washed tens of thousands of times. It does not stick to water, is resistant to various acid and alkali corrosion, and has good fire and mildew resistance. ； It is resistant to low temperatures of -40°C to -50°C and high temperatures of 110°C to 130°C. It is free of any pollution, radiation and odor, and will not harm human health. The paint can be widely used for interior and exterior wall decoration of buildings ； Anti-corrosion and rust prevention in high-rise objects and machinery industry ； Surface renovation of ceramic tiles, bathtubs, sanitary ware, etc. ； As well as the modification and value-adding of ordinary cement boards, plastics, glass and other products, their service life is as high as 15-20 years.

Mechanical coating using rollers is suitable for painting flat objects, such as tinplate, artificial panels, cardboard, walls, etc. It is generally divided into two types: manual roller coating and mechanical continuous roller coating. 　　The manual roller coating method is used for coating buildings, ships, vehicles, etc. Walls and knurling can also be painted using the roller coating method. The roller used for roller coating is a hollow cylinder with a small diameter. The surface is made of plush synthetic fiber. There are two washers at both ends of the cylinder and a hole in the center. The curved handle passes through this hole. When using it, first dip the roller into latex paint or other coatings to moisten it, and then apply the roller to the desired surface. 　　The principle of mechanical continuous roller coating is the same as that of printing machinery. It is characterized by continuous operation, high construction efficiency, and the viscosity of the coating can be higher. Generally, the rotation speed of the roller is about 20 to 30 revolutions per minute. After the coating is transferred to the roller and then applied to the surface of the object, a uniform coating can be obtained. Due to the high production efficiency, it can save manpower, material resources and reduce costs. The quality of the paint is also good, meeting decorative and protective quality requirements.

Mechanical coating using rollers is suitable for painting flat objects, such as tinplate, artificial panels, cardboard, walls, etc. It is generally divided into two types: manual roller coating and mechanical continuous roller coating. 　　The manual roller coating method is used for coating buildings, ships, vehicles, etc. Walls and knurling can also be painted using the roller coating method. The roller used for roller coating is a hollow cylinder with a small diameter. The surface is made of plush synthetic fiber. There are two washers at both ends of the cylinder and a hole in the center. The curved handle passes through this hole. When using it, first dip the roller into latex paint or other coatings to moisten it, and then apply the roller to the desired surface. 　　The principle of mechanical continuous roller coating is the same as that of printing machinery. It is characterized by continuous operation, high construction efficiency, and the viscosity of the coating can be higher. Generally, the rotation speed of the roller is about 20 to 30 revolutions per minute. After the coating is transferred to the roller and then applied to the surface of the object, a uniform coating can be obtained. Due to the high production efficiency, it can save manpower, material resources and reduce costs. The quality of the paint is also good, meeting decorative and protective quality requirements.