How Do I Choose the Best Production Line System?

The so-called coating refers to covering the metal or non-metallic surface with a protective or decorative layer. With the development of industrial technology, painting has developed from manual to industrial automation, and the degree of automation is getting higher and higher, so the application of coating production lines is becoming more and more extensive, and has penetrated into many areas of the national economy. Most of the conveying parts are stainless steel mesh chain conveyors, and coating equipment conveyor network chain manufacturers.

Painting

The seven major components of the coating line mainly include: pre-treatment equipment, dusting system, painting equipment,

The coating production line process is divided into: pre-treatment, powder coating, heat curing.

Application Features of Coating Line Engineering:

The coating line equipment is suitable for painting and plastic spraying on the surface of the workpiece. It is mostly used for painting of single pieces or small batches of workpieces. It cooperates with hanging conveyors, electric trolleys, floor conveyors and other transportation machinery to form transportation operations.

Engineering process layout:

1. Plastic spraying line: upper conveying chain-plastic spraying-drying (10min, 180 -220 )-cooling-next part

2. Spray paint line: upper conveyor chain

The development of China's coating production line has experienced the development process from manual to production line to automatic production line. China's coating technology can be simply summarized as follows: pre-treatment spraying drying or curing three waste treatment. China's coating industry really originated after the introduction of Soviet technology in the 1950s. In some aided projects, coating production lines have begun to be established, but these production lines are generally a combination of steel plate welded tanks plus a steel structure spray (painting) paint room and a drying room (furnace), and electric hoists manually suspend workpieces (a few With a hanging conveyor). At the time

The pollution of coating production line generally includes exhaust gas, waste water, waste residue and noise. At present, the exhaust gas of China's coating production line mainly comes from the exhaust gas from pretreatment, painting room, leveling room, and drying furnace. The pollutants emitted are generally as follows: organic solvents that can form photochemical smog, volatile paint odors, Thermal decomposition products and reaction products, acid-base mist, dust generated during shot blasting, and dust in paint mist. The use of coatings that do not contain organic solvents or low organic solvent content is the most effective way to solve organic solvent pollution. Minimize the amount of organic solvents and reduce the amount of organic solvent waste gas treatment. Centralize the treatment of waste gas containing high concentration of organic solvents. It is discharged to the atmosphere after dilution. For high-concentration, small-air-volume organic solvent waste gas emitted from the drying and curing furnace in the production line, it is usually treated by the combustion method, catalytic combustion method, and adsorption method.

Wastewater mainly comes from degreasing, phosphating, passivation wastewater generated by pre-treatment of coating, and electrophoretic paint-containing wastewater generated by cathodic electrophoresis. Wastewater from the spray booth and cleaning of waterborne mid-coat paint, and periodic discharge of waste water from the topcoat spray booth. Generally all waste water is concentrated in the basement and treated separately according to the type of sewage. Neutralize, precipitate, filter, and discharge wastewater containing acid and alkali; use electrolytic and chemical reduction methods for wastewater containing hexavalent chromium (Cr6-); and treat spray booth wastewater, whether it is water-based paint or solvent-based paint. Wastewater, all added

At present, it is estimated that there are thousands of coating production lines in China, and almost half of the large-scale coating production lines have been introduced. From the existing coating production lines in China, the following problems exist: ^[1]

1. The coating production line should pay attention to the mounting and hanging of the coated objects. The dip test is used to design the mounting method of the hanger and the object on the coating production line in advance to ensure that the workpiece is in the best position during dip coating. The maximum plane of the object to be coated should be close to vertical, and the other planes should be at an angle of 10 ° -40 ° to the horizontal, so that the painted surface of the remaining paint can flow more smoothly.

2. When coating on the coating production line, in order to prevent the solvent from spreading in the workshop and dust from falling into the paint tank, the paint dip tank should be protected.

3. After the large objects are dip-coated on the coating production line, they should be sent to the drying room after the solvent has basically evaporated.

4. Pay attention to the determination of the viscosity of the coating when painting. The viscosity should be measured 1-2 times per shift. If the viscosity increases by more than 10% of the original viscosity, the solvent should be added in time. When adding solvents, stop

The coating production line equipment has been continuously developed since the 1970s, especially after the reform and opening up, but it is basically in a "spontaneous" state. Domestic coating equipment does not meet market demand. Many key spraying equipment are still imported. many. It is estimated that there are currently more than thousands of existing coating production lines in China, and hundreds of new production lines have to be invested each year. The annual investment in the country is about one billion yuan, and the sales of foreign products and joint ventures account for 30% 40 %. ^[2]

Pay attention to the training of painting professionals. Colleges and universities should set up relevant majors according to market demand; strengthen training of existing personnel to improve technical quality; strengthen investment in the development of coating production lines, survive the fittest in coating production line manufacturing enterprises, and establish a modern coating industry management system.

Because of the proportion and role of the coating production line in the national economy, it is necessary to create the necessary public opinion, draw the attention of the national functional departments and industry management departments, carry out the necessary macro planning and professional guidance, and Give necessary support to development.

(3) Establish a national coating industry information network as soon as possible, improve coating quality and strengthen technical exchanges, organize and coordinate visits, discussions, digestion, absorption, and innovation of imported projects, and work together for the localization of coating equipment.

Strengthen the management of painting safety technology, implement relevant national standards for the safety regulations of painting operations, and recommend the implementation of painting production line design and manufacturing permit system, improve and perfect safety protection measures, ensure production safety, personnel safety, and meet environmental protection requirements.

Adopt new technologies, promote the use of new coatings, and actively carry out technical transformation of the original technology backward coating production lines, change the non-standard design and production of coating production line equipment to standardized, serialized design and production, and improve the coating production line equipment Technical level and production level. Adopt new technology, new equipment, new materials, actively adopt energy-saving measures, adopt online testing, promote the application of computers in coating production lines, improve the level of mechanization and automation of production lines, improve the corrosion resistance and decoration quality of painted workpieces, and ensure coating The quality of the production line equipment.

Occupying the market requires well-thought-out planning, marketing, and services. Scientific management, advanced technology, and excellent services must be achieved. Design and manufacturing units in the coating industry must work together to strengthen cooperation and better serve customers. service.