Category: Tutorial

Overview of coatings Coatings are complex chemical mixtures. Generally speaking, coatings are mainly composed of primary, secondary and auxiliary film-forming substances. The main film-forming material is an indispensable part of the coating, which plays a leading role in the performance characteristics of the coating layer. Secondary film-forming substances refer to various pigments, fillers, which cannot be filmed alone, but are important components that make up the layer and affect their properties. Anancillary film formers include solvents and many other additives that improve the properties of coatings and coatings. Classification of paints According to the state of the coating: powder coating and liquid coating; According to gloss: glossy paint, flat paint and matte paint; According to the drying method: self-drying paint, baking paint, infrared drying paint and ultraviolet drying paint (i.e.,…

For UV coating application, it's crucial to understand how much UV energy required in order to have it properly cured. Only after we confirmed the amount of energy we can then determine how many UV lamps to install with specific power. In order to properly configure the UV oven, there's a variety of properties we need to take into consideration during our calculation. Following we will introduce a formula for quick calculation. Points to consideration For accurate calculation we need to understand the following - type of product for painting, line speed and the time to stay under uv light. Type of product - Different products require different uv coating to work with. For example the uv coating for plastic and metal parts have different components and required uv radiation…

Ultrasonic spraying is a coating deposition process that utilizes ultrasonic atomization technology. Firstly, the coating material to be deposited is configured into liquids such as sols or suspensions, which are then atomized into micron-sized droplets through a special ultrasonic atomization device called ultrasonic nozzle. These atomized coating will then evenly deposited on the substrate surface by pressurized air. Ultrasonic spraying is considered an economical and superior deposition process for certain materials that can be used to obtain a comparable quality coating at affordable deposition equipment such as vapor deposition or sputtering. Comparing to traditional single-fluid or two-fluid spraying (air spraying), ultrasonic spraying has significant advantages such as very soft and uniform atomization, non-clogging spray guns, and highly controllable spray flow, so as to obtain much higher raw material utilization rate…

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…