Category: Tutorial

Painting on metal surface requires necessary pretreatment in order to achieve the best finishing. Among the various solutions, phosphating is the most popular choice for mass production. Phosphating or phosphate conversion is a process of chemical treatment over metal part. The chemical conversion on metal surface provides a protective layer which is uniform and inert to the environment. Phosphate process includes zinc phosphate, iron phosphate, chromate, or manganese phosphate. Benefits of the phosphate treatment include: better adhesion for post processes like powder coating paint improved corrosion resistance surface that is tightly bonded to the base metal. Phosphating can be performed on ferrous (iron, steel based) and non-ferrous surfaces (zinc, chrome, aluminum, and manganese). Wash and Phosphating Phosphate wash is properly preparing the parts by cleaning residues left from prior processes…

Electrostatic Painting Principle and Composition Electrostatic painting uses the workpiece as the positive electrode(usually grounded). The paint atomization device is the negative electrode which is connected to the negative high voltage power supply. Between is a high-voltage electrostatic field with the workpiece. The paint is squeezed into the nozzle at high speed under compressed air then hits on the nozzle, here it's negatively charged and forms micron-sized atomized particles then spray through the circular outlet of the nozzle. Due to the effect of corona discharge, the paint particles repel each other and further atomize. According to the principle of "opposites attract each other", the negatively charged paint medium forms an embracing effect on the workpiece under the action of the electric field force, along the power line directionally flow to…

Furniture is a big industry as it's related to each family for every reason. Any furniture will need partial or complete painting treatment in factory either for decoration or surface protection purpose. In general, furniture items are available in full unit or just piece by piece component parts. In order to properly paint these different units we have to implement a suitable machine for each. In the following we will learn on these different pieces and advise a workable painting solution. Flat board The most common piece for furniture production such as cabinet, door and table etc. For such flat pieces, we normally need to paint top surface only or sometimes on the 4 edges. In order to paint the flat board properly, we normally make a horizontal conveyor system…

Spray coating is more and more used in every corner for modern industrial production. If we take a view over the coating history we will see it has been heavily developed with quick iteration. Either the paint or the application technology or the machinery has been improving quickly over the last 30 years. Now standing at the industrial 4.0 entrance we will take a glance view of the next 5-10 years development of spray coating industry. Practicality Or usability, means the possibility of quick and wide application by different industries. With the technology development, any new devloped spraying technique can be quickly applied to real production to win the market. As there're more and more players, everyone will try to give a competitive solution and doing new research. Integration The…

In the coating process, VOCs are mainly produced in the spraying and drying process of the middle coat and top coat over plastic parts finishing(sealing and spraying due to relatively small content of VOCs). The organic waste gas produced by painting has the characteristics of large air volume and medium to low concentration. 1)Paint spray booth: The main harmful component from paint booth exhausting is the organic solvent volatilized during the painting process. The spray booth exhaust volume is large but the total concentration of organic matter is low, generally below 100mg/m3. In addition, the exhaust from paint spray booths often contains a small amount of paint mist that has not been fully treated. Especially in the dry paint filter spray booth, there are more paint mist exhausted. 2)Drying chamber:…