Certainly! Sandblasting is a crucial preparatory step that cannot be overlooked when gearing up for powder coating. Ensuring a flawless finish and prolonged durability hinges on this preliminary process.
So, What Exactly Is Sandblasting?
It uses a blasting machine fitted with abrasive materials typically sand to clean surfaces scrupulously by removing dirt stains or previous finishes. Known as dry abrasive blasting as well, this method requires the operator to be aware of different media and how they are used effectively for best results.
Why Does Everything Have to Start with Sandblasting before Powder Coating?
It's because metal surfaces, with time in the process of daily use, tend to attract all sorts of contaminants. Trying to go on with powder coating such a surface is like going to war without armor. It has clear repercussions – whatever foreign particles are left on the surface can cause an uneven finish and will therefore ruin the effectiveness of the coating. So, it is absolutely necessary to have a clean surface that is free from oxidation and contamination. One needs to remove debris, rust, paint, oils, plating, and similar substances in order to reach the ideal level of cleanliness.
This is where sandblasting comes as the unbeatable choice for anyone considering powder coating. Other cleaning methods simply won't provide the accuracy and depth required by this delicate process. Your quest for a seamless finish that will stand the test of time begins with the pinpoint accuracy of sandblasting – the most precise method there is for preparing surfaces for powder coating.
Advantages of Sandblasting Before Powder Coating
Surely, what do you stand to benefit from sandblasting, is it worth it? Let’s find out.
1.Effectively Gets Rid of All Contaminants
We cannot emphasize the importance of sandblasting in eliminating all the unwanted stuff on your metal surfaces. It removes all the contaminants, rust, and old peeling paint. This way, you can easily move forward to the next step of finishing your metal surface, which is powder coating.
2.Ensures Easy Bonding Between Powder Coat and The Metal Surface
Prolonged use of a metal surface takes its toll; You might notice some scratches. Although they are not too obvious to the eye, they can hinder good powder coating adherence. Sandblasting is the ultimate solution as it removes the irregularities on the surface. That way, the bond between the powder coating and your metal surface is improved, which helps you achieve a smooth finish.
3.Ensures Better Durability of The Coating
Another benefit of sandblasting is that it creates a clean porous surface. Therefore, powder coating after you sandblast will guarantee a more long-lasting than one applied directly to the metal surface. Sandblasting is also handy for surfaces exposed to harsh conditions, like fences. The strong powder coating adhering will ensure the metal surface looks good for a long.
4.Cleans the Surface
Sandblasting is best known for its superior cleaning properties. You can use the technique to clean metal surfaces with contaminants like dirt, rust, oil, etc. All the contaminants are removed, leaving you with a smooth, clean, ready-for-powder coating.
5.More Effective for Angles and Curves
Traditional methods of preparing a surface for powder coating, like hand-sanding, only work on fat surfaces. Sandblasting, however, will get even to the most corners and curves.
Also, most metal parts have undergone different forming processes and will have dimensions that entail curves and corners. Sandblasting removes the contaminants in these otherwise inaccessible areas. This will save you time, energy and provide you a perfect finish.
Alternative Methods of Preparing a Metal Surface for Powder Coating
Of course, there are other ways you can get rid of powder coating and other finishes like chemical strippers and burn-of. However, these methods may be risky or too complex.
Some powder coat strippers, for instance, can cause severe burns on contact; you must take excessive precautions while handling them and have irritating odors. Additionally, the high temperatures inside burn-of ovens might warp the metal surface and make it challenging to apply a fresh coating.
Take Away
Now you know why it's important to sandblast your metal surfaces before the powder coating process. You're protecting the metal from abrasive conditions making the coat more durable. If you skip sandblasting, you will not get the desired results; the coating will crack and peel in no time, and you might go back into your pockets to buy an additional powder coat. Sandblasting will save all the trouble and more. Ramseier Koatings is here to help with all your powder coating equipment needs.
Our distributors and service centers are all over the world.
In order to ensure that our customers can get more professional advice before and after the sale of spray products, we will also provide timely maintenance support and spare parts supply to customers through the service network.
Few on the market Test Service
Test centre has been set up in our factory in China where customers can perform tests and simulation works. Our demo labs are equipped with the latest powder equipment for trial use by our customers.
The KPC series powder center integrates powder supply, powder recovery and sieving functions in a compact housing, and is equipped with an extraction device to ensure a clean working environment in the workshop. The KPC allows operators to change colors quickly and efficiently in a short time. The PLC control system will automatically clean the powder hose and internal powder path of the spray gun to reduce downtime and powder contamination problems. The extraction device of the KPC can be integrated with the KPC or with the main filter unit.
KMB "Magic Box" series fast color change powder spraying system is designed to solve the color change troubles of customers. The whole system adopts advanced plastic structure and automatic recycling control system, which can save color change time, improve equipment utilization rate and create profit return rate.
ACB high efficiency spray booth system has unique design and advantages. The bottom air duct of the booth adopts the ‘even flow’ flap structure, the side panels of the booth adopt the advanced design without automatic gun opening, and the systematic supporting design creates the ideal powder atomisation area of ‘flexible spraying’, which has a gentle air flow, providing an ideal working environment for powder coating. This provides an ideal working environment for powder coating. This design and functionality makes the ACB high efficiency spray booth system highly efficient and operable in powder coating operations, able to meet the coating needs of different workpieces, while also demonstrating excellent performance in cleaning and recycling, providing a strong guarantee for high quality powder coating operations.
ColorWing wing-type spray booth has unique design and advantages. It is mainly suitable for spraying workpieces in vertical hanging mode, such as aluminum profiles, highway guardrails, etc. ColorWing wing-type spray booth uses the patented design of "wing-type wall panel" and "wind tunnel" cleaning mechanism, which is efficient and fast when cleaning and changing colors.
The CQB high-efficiency spray booth system adopts a sandwich-style all-plastic structure with a bright and elegant design. The manual workstation is open and external, which is convenient for manual operation. The workpiece outlet is designed with a PVC solid door, which is closed during cleaning to shorten the cleaning time. The bottom recovery adopts a "uniform flow" multi-channel design to even out the exhaust airflow, thereby achieving better powder application efficiency.
The CQB high-efficiency spray booth system adopts a sandwich-style all-plastic structure with a bright and elegant design. The manual workstation is open and external, which is convenient for manual operation. The workpiece outlet is designed with a PVC solid door, which is closed during cleaning to shorten the cleaning time. The bottom recovery adopts a "uniform flow" multi-channel design to even out the exhaust airflow, thereby achieving better powder application efficiency.
Sieve and separate the powder sent back by the recycling system to remove impurities, and then send it to the powder supply system for reuse in the spray gun system
Sieve and separate the new powder to make the new powder more evenly mixed
Different mesh sizes can be configured according to the customer's different products and the number of spray guns, and vibrating screens of different diameters can be selected to improve product spraying efficiency
According to the characteristics of coil spraying, such as large amount of powder, uniform coating, thin coating and corrosion resistance, ultrasonic vibrating screen is selected, which can achieve high precision, high mesh screening, low energy consumption and high efficiency.
DDF3 high-power powder pump can operate friendly under high powder concentration and low air flow rate powder supply conditions. It can operate stably in harsh hot and humid environments for a long time. DDF3 high-power powder pump can adapt to different types of powders and maintain a soft, smooth and stable powder conveying effect. DDF3 high-power powder pump is user-friendly and easy to operate. It will not spit powder under different conveying distances and powder types. The sturdy structure can meet the high-pressure cleaning requirements required for fast color change systems.
BV-1 high-power powder pump for powder recovery is used to recover powder from the recovery system to the powder supply system. The powder delivery capacity is more than 7kg/min
Powder can be directly supplied to the powder supply system from the powder box. The bottom bracket of the powder box is equipped with a vibrator, so no "holes" will be formed during the powder suction process, ensuring the continuity of powder suction.
The powder is directly supplied from the ton bag to the powder supply system, and the ton bag is placed on a mobile trolley with a vibrator. Equipped with multiple sets of high-efficiency and high-power powder suction devices to meet the requirements of large powder consumption. The automatic lifting device and the special powder hopper design make the powder bag have less residual powder
Based on more than 30 years of successful experience in designing rapid color change systems, the unique MPC closed-loop powder supply center can provide efficient rapid color change capabilities. The MPC closed-loop powder supply center can be upgraded to the rapid color change capability of an existing powder spraying system alone or integrated with a complete powder spraying system (including spray booth, powder recovery system, spray gun and elevator, etc.).
Whether the user is adding new spraying equipment or upgrading and modifying the existing spraying equipment, the PMC system that must be configured in the process of realizing digital control technology includes DDF powder pump, new powder supply device, powder supply barrel, high-efficiency powder screen and control cabinet.
It consists of a vibrating screen and a powder barrel. The recovered powder passes through the buffer of the vibrating screen, to the screen, and then to the powder barrel after screening. The powder barrel then supplies the powder to the spray gun system.
The spray gun is fixed on AutoFlex100, which can move up and down, forward and backward, left and right, and rotate up and down. It can memorize the spray angle and position of the workpiece and realize automatic groove spraying. It adopts the latest digital positioning system and PLC control to ensure stable and reliable lifting. The main control touch screen can display the lifting speed and program multiple working programs. It can also be controlled by an independent touch screen/tablet or mobile phone. The operating system software is user-friendly through simple graphics and Chinese and English analysis.
To meet the requirements of workpiece shape, line speed, coating and output, our HDR6P lifter achieves the best results with unique functions. The HDR6P lifter is equipped with a precision programmable electric servo motor, adopts the latest digital positioning system and PLC control, ensures the long-term repeat accuracy of the spray gun during automatic spraying, and the lifting action is smooth and reliable. The main control touch screen of the equipment can display the lifting distance and speed, and can be programmed into more than 255 working programs. The operating system software uses simple graphics with Chinese or English explanations, which is user-friendly.
To meet the requirements of workpiece shape, line speed, coating and output, we provide the SR series of lifters, which can achieve the best effect required by customers with its different features. The SR series programmable electric lifter has a stylish appearance and precision manufacturing. It can ensure the long-term repeat accuracy required by the spray gun during automatic spraying. It adopts the latest digital positioning system and PLC control to ensure smooth and reliable lifting action. The lifting distance and lifting speed can be displayed on the main control touch screen of the equipment, and more than 255 working programs can be programmed. It can be controlled by independent touch screen and/or manual buttons. The operating system software uses simple graphics with Chinese or English explanations to make it more user-friendly. SR series short-range programmable lifter-suitable for vertical cloth gun automatic spraying online, with a travel distance range of 100-400 mm.
To meet the requirements of workpiece shape, line speed, coating and output, we provide the ER and HDR series of lifters to achieve the best results required by customers with their different features. The ER/HDR series programmable electric lifters are stylish and precision-made. They can ensure the long-term repeat accuracy required by the spray gun during automatic spraying. The latest digital positioning system and PLC control are used to ensure smooth and reliable lifting and lowering. The lifting distance and lifting speed can be displayed on the main control touch screen of the equipment, and more than 255 working programs can be programmed. Independent touch screen and/or manual button control are optional. The operating system software uses simple graphics with Chinese or English explanations to make it more user-friendly. ER series long-range programmable lifters - suitable for use with up to 6 automatic spray guns. HDR5P series heavy-duty long-range programmable lifters - suitable for use with up to 9 automatic spray guns.