Category: Tutorial

What is the global explosion-proof compliance standards? Explosion-proof certification is used to determine that equipment meets the requirements of explosion-proof standards, type tests and adaptive routine tests, and issuance of relevant certificates of conformity. The certificate can be for Ex equipment or Ex components. Equipment and protection systems used in explosive gas environments must comply with a number of regulations, standards and directives in order to enter the global trade market. It's critical to fully understand those compliance in order to hand over the equipment to desired area. Especially in paint spraying industry, many countries require explosion-proof compliance. The European Union’s ATEX certification adopts EN standards The ATEX explosion-proof directive 2014/34/EU used to regulate equipment and protection systems used in potentially explosive environments is a mandatory regulation among EU member…

Powder coating has high production efficiency, excellent coating performance and eco friendly advantages, has been widely used in the world with a 10% yearly growth rate. By ensuring the appearance of powder coating film and mechanical properties, the most concerned is consumption of powder coating, that is, the production costs, so powder coating loading rate is common concern from both manufacturer and end user. The principle of electrostatic powder coating Electrostatic powder coating is the use of high-voltage electrostatic corona electric field. Spray gun needle connected to the high-voltage negative (generally 60 to 100kV), workpiece is grounded to form a positive pole, so between the spray gun and workpiece there's a strong electrostatic field. when the powder coating is sent from the powder supply barrel to the spray needle through…

With the fast industrial development, 2k or multi components paint is more and more popular in surface finishing such as automotive, electronics and various traditional industries. Because it's technical property and application devices are quite different from traditional way, here we provide quick guidance of this coating and it's advantages in operation. 2K Coating Characteristics Spraying time Spraying time is important for two-component paint users: because the curing of two-component paint is not by evaporation of solvents into a film, but through chemical cross-linking reaction to complete the curing process, the curing process releases heat. The viscosity of mixed paint increases rapidly until it is fully cured. Mixing Ratio Accuracy When it comes to proportional accuracy, it will involve mass ratio and volume ratio. Graco's two-component proportioning system uses volumetric…

Intelligent spray coating is the next generation of industry 4.0 requirements. It's not just a basic mechanic automation on specific workstation but a general system management which is a cross platform automation. From spray coating industry, intelligency requires both hardware construction and software programming. It's a high end system setup for high end production. Regarding the general setup, we'll briefly introduce on following points. Robotic Automation The basic hardware requirement of intelligent spray coating system. Robotic operation includes - spray gun motion, paint preparation, possible transfer to next handling station plus environment control etc. The mechanic part must be automated and scalable to work with system control. So basically, all mechanic devices in production line must be robotic and be able to connect with system control. Intelligency Intelligency is actually…

For any type spray painting system, cleaning pretreatment is a MUST for guaranteed surface finishing quality. Either by rinsing or electrostatic blowing, the sole purpose is to make workpiece clean enough to meet with painting requirement. Despite the traditional cleaning solutions, CO2 snow cleaning is more and more requested for its simple structure and eco friendly advantages. CO2 Snow Cleaning Introduction CO2 snow cleaning is a process of blasting CO2 from gas to dry ice state softly and gently. During CO2 snow blasting, liquid CO2 is converted into solid CO2 snow particles with a diameter of between 1 to 100 µm, via thermodynamic and physical processes. These CO2 snow particles from dry ice have a temperature of -78.5 °C. CO2 snow particles are added proportionally to the compressed air. The…

Painting is the last but very important stage of wooden door manufacturing process. Due to it's technical operation, the level of surface finishing can directly tell the factory manufacturing level and competitiveness. The core part of wooden door painting is in three parts: the selection of paint, the design of painting process, and the application of painting equipment. Selection of Paint Coatings are mainly available as five types: PU paint (polyurethane paint), PE paint (unsaturated resin paint), NC paint (nitrocellulose paint), UV paint (ultraviolet curing paint), and W paint (water-based paint). In the painting of wooden doors, the above five paints are popularly used. They have different shares in different types of enterprises in different periods. 1- PU Paint PU is one of the most commonly used paint for door…

Priorior of spray painting, a suitable pretreatment is needed and crucial for high quality surface finishing. For metal piece objects, especially for those heavy pieces by welding production, the popular pretreatment solution is shot blasting or sand blasting. Regardless the technologies being used, the sole purpose of both solutions are mean to clean up the surface such as rust, grease or other contaminations. In order to understand better if we should use shot blasting or sand blasting, following we provide a general comparison for quick start. What's Shot Blasting? Shot blasting is a process of propelling abrasive media material with centrifugal or mechanical force. This abrasive treatment method uses a device of high speed spinning wheel to centrifugally accelerate shot-like material and blast it against a surface. Shotblasting is an…

Automatic paint spraying is not a bare spray gun but multiple crucial devices such as paint pump and control system. Paint supply device is direct connection with spray gun, thus a correct selection is very important for smooth operation. Most paint spraying is supported by air based technologies so there're two options of paint supply - diaphragm pump and pressure pot. So which one is better? In following content we will briefly introduce the two options and compare side by side from operator sight. Diaphragm pump The diaphragm pump definition comes under the classification of positive displacement pumps that utilize the grouping of the reciprocating operation of thermoplastic, rubber and Teflon diaphragm. The flowrates of these devices will not fluctuate much with that of discharge pressure which means the pump…

Chain conveyorised painting line system is widely used for it's high efficiency and ease of operation. Especially for mass production requirements, chain conveyor system transfer products automatically through each treatment station from start to end. No manual touch during this process for guaranteed quality. Chain conveyor is a crucial component in this painting line system but not considered seriously most of the time. Here in following section we will provide in-depth guidance how to configure a suitable conveyor system to work well with production requirements in long run. Genearl setup principle Chain conveyor is a basic but very technical design component of painting line. The mechanical structure has to follow existing space design and fulfill paint technical requirements. Thus a good design will provide a tight structure to make full…

In coating industry, there're various ways of paint application and each solution has its unique advantages. In order to choose a suitable method, we need to check carefully on multiple specifications such as object design, dimensions and production requirements etc. In this article we will compare two of the most popular solutions - fixed gun spraying on chain spindle system and robotic spraying machine. We will start from technical review, ease of use and production efficiency and give our followers an indepth guidance. Fixed gun spraying brief review As the name says, spray gun is fixed in paint booth. In production, we need to adjust spray gun angles and positions so paint can by sprayed on objects properly. Products are loaded on spindles by chain conveyor system. When passing through…