Over the past 30 years since the reform and opening up, the coating industry has made great progress in self-improvement and development in order to meet the development needs of various departments of the national economy. Products, quality, variety, quantity and technical equipment level have been greatly improved. In particular, through the introduction of technology and cooperation with foreign investors, the technical level and ability of the industry have been improved.
“2013-2017 China coating industry market demand forecast and strategic investment planning analysis report” shows that at present, the domestic coating industry in coating materials, coating technology and equipment, has basically met the needs of household appliances, machine tools, machinery, furniture, construction and other industries, and has made outstanding contributions to the development of the national economy, but the domestic coating technology is similar to the foreign advanced technology There is still a big gap between the two, which is mainly reflected in the industries with higher requirements for coating technology, such as car coating, which can not fully meet the requirements. At present, the domestic car coating technology and equipment are still mainly foreign technology and equipment.
In addition, domestic coating enterprises have made a lot of efforts in technical innovation, and have made great achievements. However, it still needs independent innovation. The direction and goal of the future development of the coating industry is to further meet the needs of the continuous development of the national economy, mainly to reduce pollution, energy conservation and emission reduction, improve the process, improve the decorative, protective and functional properties of coatings, as well as the generalization, serialization and automation of coating equipment. The so-called coating refers to covering metal and non-metallic surfaces with protective or decorative layers. With the development of industrial technology, it goes deep into many fields of national economy. The development of China’s coating production line has experienced the development process from manual production line to automatic production line. The painting process in China can be simply summarized as: pretreatment → spraying → drying or curing → three wastes treatment. China’s painting industry really originated after the introduction of Soviet technology in the 1950s. Since the 1960s, due to the development of light industry, there have been mechanized production lines and automatic production lines in the bicycle manufacturing industry, as well as the program-controlled assembly lines formed on the basis of the original trough production line and the program-controlled car, which are mainly in Shanghai and Tianjin. During this period, the main task of China’s coating industry was mainly anticorrosion. However, with the development of China’s economy and the development of foreign painting technology, through the introduction of technology and the exchange of foreign technology, China’s coating technology began to develop rapidly. In the aspect of coating automation production, the popularization and application of electrostatic spraying and electrophoretic painting technology, and the development and promotion of powder spraying technology, especially in China’s home appliance industry, household hardware, steel furniture, aluminum With the rapid development of components, electrical products, automobile industry and other fields, the coating industry has made obvious progress.
2、 Coating production spare parts – coating equipment:
- Through shot blasting chamber
The through shot blasting chamber is composed of cleaning chamber body, shot blasting machine, shot circulation system, ventilation and dust removal system, bottom foundation and electrical control system. Non standard design of different sizes can be carried out according to different specifications of workpieces, and finalizing equipment can also be selected.
Through shot blasting chamber is suitable for cleaning and strengthening the surface of structural parts of construction machinery, forging and casting, and high-speed computer gong processing, so as to obtain a smooth surface with certain roughness, increase the adhesion of coating film and improve the anti-corrosion effect of workpiece. When the workpiece enters the shot blasting chamber, the shot blasting machine driven by the motor will throw high-speed projectiles centrifugally, which will strongly impact the rust and oxide scale on the surface of the workpiece. The surface quality of the workpiece can reach the standard of SA2 ～ Sa2.5.
- Water spinning spray booth
Water spinning spray booth is also called hydraulic spinning spray booth. This chamber adopts the gas laminar flow suppression method to prevent the paint mist from spreading, and uses the hydraulic spinning pipe to filter the paint mist. It is a relatively complete paint spraying room in technology at present.
The water spinning spray painting room is composed of a chamber body, an electric door, a paint mist filtering device, an air conditioning air supply device and an exhaust device. The lighting device is installed on both sides of the room, and the illumination is above 500 lux, which can be controlled in groups. Combustible gas concentration detection and alarm devices are installed indoors. The paint mist filtering device is composed of washing plate, hydraulic spinning device, underground water tank and exhaust device. The results show that the removal rate of paint mist is more than 98%. The air supply device is the main component to make the gas form laminar flow. After being filtered and heated, the air sent into the air supply room is evenly sent to the room from the air supply ceiling, so that the indoor wind speed is even. When there is no workpiece, the vertical wind speed can reach (0.35 ~ 0.4) m · s – 1; The exhaust device uses a fan to filter the gas containing paint mist in the chamber through a hydraulic spinning pipe, and then discharges it from the sink and the washing plate.
- Hot air drying room
The drying method is hot air circulation convection mode, its biggest advantage is that the baking is uniform, especially suitable for the construction machinery parts with large heat capacity. Heating heat sources include steam, electricity, light diesel, natural gas, liquefied petroleum gas, etc. If conditions permit, LPG shall be preferred. It is a kind of clean and efficient energy. The biggest advantage is that the cost of production and operation is only 35% – 40% of the cost of electricity.
- Conveying system
For construction machinery components (structural parts), the use of self-propelled electric hoist is an effective choice.
The conveying system of self-propelled electric hoist is composed of gantry column, bearing rail, sliding conductor rail, collector, loading car, electric hoist and central control cabinet controlled by PC.
The system integrates mechanical, electronic, computer, automatic
About the author