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• How should small and medium-sized enterprises select appropriate spray painting equipment? Don't overlook these 4 key points

  Apr 13, 2026

  For small and medium-sized enterprises and individual operators, choosing a suitable spraying equipment can not only improve production efficiency and reduce costs, but also ensure product quality and enhance market competitiveness. But there are many types of spraying equipment on the market, including large automated production lines and portable spraying machines, and many companies do not know how to choose. Today, based on the characteristics of small and medium-sized enterprises, we will share four key points for selection to help everyone avoid pitfalls and choose the right equipment. Key point one: Choose equipment types based on production scale and demand. If the enterprise produces in small batches and multiple categories, such as small metal crafts, automotive repair parts, etc., it is recommended to choose a portable spray coating machine. The portable spray coating machine is compact, easy to carry, easy to operate, does not require a dedicated site, has low investment cost, and can flexibly adapt to the spraying needs of different scenarios; If the enterprise is engaged in large-scale and standardized production, such as household appliance casings, automotive parts, etc., it is recommended to choose an automated spray coating production line. Although the initial investment is high, the production efficiency is high, the coating quality is stable, and long-term use is more cost-effective. Key point two: Pay attention to the core performance and stability of the device. Regardless of which device is chosen, core performance is crucial. For spray painting machines, attention should be paid to the atomization effect of the spray gun, the range of powder output adjustment, and the stability of electrostatic voltage, which directly affect the quality of the coating; The stability of the powder supply device is also important to ensure uniform and continuous powder feeding, and to avoid powder breakage; The curing oven should be able to accurately control temperature to ensure that the coating is fully cured. It is recommended to choose brands with good reputation and guaranteed quality, and avoid purchasing cheap equipment, which may result in high maintenance costs and affect production in the later stage. Key point three: Consider environmental and cost factors. Under the "paint to powder" policy, environmental compliance is the bottom line for enterprises. The selected spraying equipment should meet environmental requirements, preferably equipped with a powder recycling system to improve powder utilization, reduce waste and environmental pollution. At the same time, the energy consumption and maintenance costs of the equipment should be considered. Portable spray painting machines have low energy consumption and simple maintenance, making them suitable for small and medium-sized enterprises; Automated production lines have high energy consumption, but unit costs can be reduced through large-scale production. Key point four: Choose based on one's own technical level. Small and medium-sized enterprises often lack professional spray coating technicians, so the equipment selection threshold should not be too high. It is best to have simple and easy to operate equipment, and the manufacturer can provide comprehensive technical training and after-sales service. For example, portable spray painting machines can be operated by ordinary workers after simple training, and manufacturers provide on-site maintenance services, which can reduce the technical pressure and maintenance costs of enterprises. To sum up, small and medium-sized enterprises should follow the principle of "choosing according to needs, focusing on performance, taking into account environmental protection, and being suitable for themselves" when choosing spray painting equipment. They should not blindly pursue high-end equipment, nor be tempted by cheapness. What suits them is the best.

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• Common Faults and Solutions in Powder Coating: This Guide Will Last You a Year

  Apr 13, 2026

  In the process of powder coating, many enterprises will encounter various faults, such as coating peeling, bubbles, sagging, color difference, etc., which not only affect product quality, but also reduce production efficiency and increase costs. I have been working in the powder coating industry for many years, and I have compiled the 6 most common faults and detailed solutions. I have collected this article so that you don't have to panic when encountering problems in the future. Fault 1: Coating peeling and poor adhesion. There are three main reasons: firstly, incomplete pre-treatment of the workpiece, resulting in oil stains, rust, and dust on the surface; Secondly, the curing temperature or time is insufficient, resulting in insufficient curing of the coating; The third issue is the poor quality of powder coating, which does not match the material of the workpiece. Solution: Thoroughly clean the surface of the workpiece, remove impurities through grinding, acid washing, and other methods to ensure a dry and smooth surface; Strictly adjust the curing temperature and time according to the powder instructions to ensure that the coating is fully cured; Choose high-quality powder coating that matches the material of the workpiece. Fault 2: There are bubbles and pinholes in the coating. Main reasons: There is moisture and oil on the surface of the workpiece, and bubbles are generated when the moisture evaporates during spraying; Powder coating becomes damp and clumps, resulting in pinholes after spraying; There are impurities in the curing oven that adhere to the surface of the coating. Solution: After pre-processing, the workpiece should be thoroughly dried to avoid surface moisture; When storing powder coatings, keep them dry. After being damp, they can be dried before use; Regularly clean the curing furnace to keep it clean. Fault 3: Coating sagging and uneven thickness. Main reasons: The distance between the spray gun and the workpiece is too close, and the dwell time is too long; Excessive powder output and high electrostatic voltage; Uneven movement speed during spraying. Solution: Adjust the distance between the spray gun and the workpiece (15-25cm), move the spray gun at a constant speed to avoid stopping; Adjust the powder output and electrostatic voltage according to the workpiece requirements to avoid excessive powder output; Strengthen operator training and standardize operating procedures. Fault 4: Obvious color difference in coating. Main reason: Different batches of powder coatings result in color differences; Inconsistent spraying parameters and varying coating thicknesses; Uneven curing temperature leads to color changes. Solution: Try to use the same batch of powder coating as much as possible, and conduct small batch trial spraying for different batches first; Unified spraying parameters to ensure uniform coating thickness; Check the temperature of the curing furnace to ensure uniform temperature inside the furnace. Fault 5: The powder does not apply and the adsorption effect is poor. Main reasons: Low static voltage, insufficient powder charging; The workpiece is not grounded or poorly grounded; Poor flowability of powder coating and blockage of spray gun due to clumping. Solution: Increase the electrostatic voltage to ensure that the powder is fully charged; Check the grounding condition of the workpiece to ensure good grounding; Clean the spray gun and powder supply device, crush the agglomerated powder, and ensure the flowability of the powder. Fault 6: There are impurities and particles on the surface of the coating. Main reason: There is dust in the spraying environment, which adheres to the surface of the workpiece; Impurities are present in powder coatings; There are debris inside the spray gun, blocking the powder outlet. Solution: Keep the spraying environment clean and clean it regularly; Filter the powder coating before use to remove impurities; Regularly clean the spray gun and keep the powder outlet unobstructed.

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• 2026 Powder Coating Industry Trend Forecast: These Three Directions Merit Special Attention

  Apr 13, 2026

  With the continuous tightening of environmental policies, the rapid advancement of intelligent manufacturing, and the rise of emerging industries, the powder coating industry is facing unprecedented development opportunities. As an industry practitioner, combined with the latest industry reports and market trends, today we will talk about the three major development trends of the powder coating industry in 2026, hoping to provide reference for everyone's enterprise development and personal career planning. Trend 1: Environmental protection continues to upgrade, and low-carbon has become the core competitiveness of the industry. With the advancement of the "dual carbon" target and the continuous tightening of environmental policies, low VOC and VOC free powder coatings will become the mainstream in the market. It is expected that the market share of low VOC powder coatings will further increase to over 50% by 2026. At the same time, the low-carbon value chain of powder coating will become a key focus. Enterprises will start from the entire process of raw material selection, production technology, and recycling system to reduce carbon emissions. The cooperation between giants such as BASF and AkzoNobel is a good example. In addition, the dividends of environmental policies will continue to be released, and the "double tax exemption" policy will further promote the process of "paint to powder". Environmental compliance will become the bottom line for the survival of enterprises. Trend 2: Intelligent and automated accelerated penetration, unmanned spraying has become a new hotspot. With the advancement of Industry 4.0, intelligent spraying technology will gradually become popular. Machine vision, big data, artificial intelligence and other technologies will be deeply integrated with powder spraying equipment to achieve real-time monitoring, parameter optimization and defect warning of the spraying process. The application of unmanned spraying lines will become increasingly widespread, reducing manual intervention, lowering labor costs and production risks. It is expected that by 2026, the penetration rate of automated powder spraying equipment will reach over 40%, and small enterprises will gradually introduce intelligent equipment to improve production efficiency and product quality. Trend 3: The application areas continue to expand, and emerging fields have become new growth points. The traditional fields of automobiles, home appliances, and building materials will continue to maintain stable growth, while emerging fields such as new energy vehicles, photovoltaics, rail transit, and medical equipment will become the core driving force for industry growth. For example, the demand for lightweight and highly corrosion-resistant powder coatings in new energy vehicles has surged, and high-performance powder coatings are also needed for surface protection of photovoltaic modules. The demand in these emerging fields will drive the innovation of powder coating technology and product upgrades. At the same time, the popularization of portable spray painting machines will further expand the subdivision scenarios such as on-site maintenance and small product processing, enriching the industry application scenarios. Opportunities and challenges coexist. In 2026, the powder coating industry will enter a stage of high-quality development. Only by keeping up with industry trends, increasing research and development investment, and enhancing core competitiveness can we stand out in industry competition.

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• Powder coating vs traditional painting: After reading this article, you'll know how to make the right choice.

  Apr 04, 2026

  In the field of industrial surface treatment, powder coating and traditional spray painting are the two most common coating methods, and many companies are hesitant when choosing: which one is more suitable for themselves? Today, we will make a detailed comparison in terms of environmental protection, cost, effectiveness, and applicable scenarios to help everyone make the best choice. From an environmental perspective, powder coating is superior to traditional spray painting. Traditional spray painting uses organic solvents, which generate a large amount of VOCs emissions and pollute the environment. It also requires a significant investment in the construction of end of pipe treatment facilities, otherwise it cannot meet environmental standards; Powder coating has no VOCs emissions, and the overspray powder can be recycled and reused with a utilization rate of over 95%. It not only complies with national environmental protection policies, but also reduces environmental pollution. It is currently one of the most environmentally friendly coating methods, especially suitable for enterprise transformation under the "paint to powder" policy. From a cost perspective, powder coating has more advantages over long-term use. The utilization rate of traditional spray paint coatings is only 30% -50%, resulting in a large amount of paint waste, high prices of organic solvents, and high environmental management costs; Although the initial equipment investment for powder spraying may be slightly higher, the powder utilization rate is high, there is no solvent consumption, and the cost of environmental protection is low. Long term use can significantly reduce coating costs. For small and micro enterprises engaged in small-scale production, the emergence of portable spray painting machines has further lowered the entry threshold for powder spraying, resulting in higher cost-effectiveness. From the perspective of coating effect, powder coating is more durable and uniform. The adhesion, hardness, corrosion resistance, and weather resistance of powder coating are superior to traditional spray painting. The coating thickness is uniform and not prone to defects such as sagging, bubbles, and peeling, providing long-term protection for workpieces; Traditional spray paint coatings are thinner, have poor anti-corrosion performance, are prone to fading, paint peeling and other problems, and have a shorter service life. From the perspective of applicable scenarios, both have their own focuses. Powder coating is suitable for metal workpieces, such as automotive parts, home appliance casings, metal furniture, building materials, etc., especially for scenarios with high requirements for corrosion resistance and wear resistance; Traditional spray painting is suitable for non-metallic workpieces such as plastic, wood, etc., and is also suitable for scenes that require high painting accuracy and multiple color gradients. To sum up, if your company focuses on metal workpieces, pays attention to environmental protection, cost, and coating durability, especially under the "paint to powder" policy, powder coating is definitely the first choice; If it is a non-metallic workpiece with high requirements for coating accuracy and color diversity, traditional spray painting can be chosen.

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• Essential Guide for Beginners: Operational Manual for Portable Spray Painting Machines to Avoid Common Pitfalls and Minimize Missteps

  Apr 04, 2026

  As a veteran who has been working in the industrial coating industry for 8 years, I am often asked by novice friends, "How to operate a portable spray coating machine? Why does the coating I spray always have unevenness and bubbles?" In fact, the operation of a portable spray coating machine is not difficult, but many beginners are prone to some misunderstandings, which can lead to poor coating effects. Today, I will compile a detailed operation guide to help you avoid misunderstandings and quickly get started. Firstly, sufficient preparation work must be done before operation. Many beginners are eager to start work and neglect the pre-treatment of workpieces, which is the main reason for coating peeling and bubbles. The surface of the workpiece must be cleaned thoroughly to remove impurities such as oil, rust, dust, etc. It can be treated by grinding, acid washing, phosphating, etc. to ensure that the surface is dry and flat. At the same time, it is necessary to check the spraying machine equipment to confirm that the spray gun, powder supply device, air compressor, etc. are operating normally, and that the powder coating is not clumped or deteriorated. Secondly, master the correct spraying techniques. When spraying, it is recommended to maintain a distance of 15-25cm between the spray gun and the workpiece, control the angle between 45 ° -90 °, and move at a constant speed to avoid staying for too long and causing the coating to become too thick or hang. The powder output and electrostatic voltage should be adjusted according to the material of the workpiece and the type of powder. Generally speaking, the electrostatic voltage can be appropriately increased for metal workpieces, and the powder output can be reduced when the powder particles are finer. In addition, the spraying environment is also important. It is recommended to operate in a ventilated, dry, and dust-free environment, with a temperature control of 15-30 ℃ and humidity not exceeding 70%, to avoid dust adhering to the surface of the workpiece. Then, the high-temperature curing process cannot be taken lightly. Different types of powder coatings have different curing temperatures and times, generally ranging from 160-220 ℃ and curing times of 15-30 minutes. It is important to strictly follow the powder instructions and not lower the temperature or shorten the time arbitrarily, otherwise it will result in insufficient coating curing, insufficient hardness, and easy detachment. After curing, the workpiece should be allowed to cool naturally to avoid immediate contact with cold water and prevent coating cracking. Finally, share a few common misconceptions. One is that it is believed that "the more powder is produced, the thicker the coating, the better". However, excessive coating thickness can lead to sagging, bubbles, and affect aesthetics and adhesion; Secondly, neglecting powder recycling not only wastes raw materials but also pollutes the environment; Thirdly, long-term failure to clean the spray gun and powder supply device leads to powder blockage, which affects the spraying effect. As long as you avoid these misconceptions and strictly follow the operating instructions, even beginners can spray a uniform, beautiful, and durable coating.

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• How to Choose a Flour Sifter with a Built-In Mechanism？

  

  Oct 24, 2025

  In the world of baking, precision is paramount. While many focus on the quality of flour or the accuracy of measurements, one humble tool often makes the difference between a good bake and a great one: the flour sifter. For generations, bakers used simple mesh strainers, but the advent of the built-in mechanism sifter promised efficiency and ease. Choosing the right one, however, requires careful consideration. It's not just about aerating flour; it's about finding a kitchen companion that streamlines your process and enhances your results.   The primary purpose of a sifter is twofold: to aerate flour and to remove lumps. Aerating incorporates air, leading to lighter, fluffier cakes, muffins, and pastries. It also makes measuring more consistent, as compacted flour can weigh significantly more than sifted flour. The built-in mechanism, typically a crank, squeeze handle, or push-button, is designed to make this process effortless and contained, minimizing mess. Your first decision point lies in the type of this mechanism.   1. The Crank Handle Sifter: The Classic Workhorse This is the most recognizable type, often evoking a sense of nostalgia. It features a crank on the side that, when turned, rotates internal paddles or blades to force the flour through a fine mesh screen.   Pros: They are generally efficient and can hold a substantial amount of flour (usually 3-4 cups). The cranking action provides good leverage, making it easy to process even compacted flour. Many models come with multiple mesh screens for a finer sift. Cons: They can be bulky to store. The mechanism, if made with cheap plastic gears, can jam or break over time. It often requires two hands—one to hold the sifter and one to crank.   Ideal for: The frequent baker who makes large batches and values traditional, reliable performance.   2. The Squeeze-Handle Sifter: The One-Handed Wonder This modern design features a handle that you squeeze, much like a pair of pliers. This action activates a mechanism that agitates the flour and pushes it through the mesh.   Pros: Its greatest advantage is one-handed operation. You can hold the sifter over your bowl with one hand and squeeze, leaving your other hand free. This is incredibly convenient for adding sifted ingredients directly to a mixture. They are often more compact and easier to store. Cons: The capacity is usually smaller (around 1-2 cups). The squeezing motion can be less efficient for large quantities of flour and may require more repetitions, potentially straining your hand.   Ideal for: The baker who values convenience, has limited storage space, or frequently adds sifted ingredients mid-recipe.   3. The Push-Button or Trigger Sifter: The Modern Specialist These are similar in concept to the squeeze handle but often have a different ergonomic design, like a trigger on the top or a button on the side. They function with a quick, pressing motion.   Pros: Very easy and intuitive to use, often feeling less strenuous than a continuous squeeze. They are typically designed for easy dispensing right where you need it. Cons: Like the squeeze models, they tend to have smaller capacities and can be less powerful than a sturdy crank sifter. The internal mechanisms can be complex and more prone to clogging if not cleaned properly.   Ideal for: The casual baker or cookie decorator who needs to sift small amounts of powdered sugar or dust surfaces with cocoa powder.   Some people take this smart design from Lvobo as the best sifting option for bakery, what do you think?

  Hot Tags : sifting machine bakery sifter automatic sifter sifting option small sifting machine bakery sifting machine smart sifter vibrating sifter

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• Powder Coating with Manual Powder Gun Aluminum Iron Electrical Box Motorcycle Frame Electrostatic Powder Coating Equipment

  

  Aug 21, 2025

  As an efficient and environmentally friendly surface treatment technology, electrostatic spraying has been widely adopted in industries such as automotive, home appliances, construction, and furniture manufacturing. However, despite its significant process advantages, the emergence of coating defects remains an unavoidable challenge in production. Among these, cratering (Cratering) has garnered particular attention due to its unique morphology and formation mechanisms. As a global top-tier expert in electrostatic spraying technology, I will delve into the essence, impacts, and solutions of cratering phenomena in this special topic, helping practitioners gain a comprehensive understanding and effectively address this issue. The introductory section will first define cratering and its typical characteristics, then explain why special attention should be paid to cratering to lay the foundation for subsequent analysis.  What is the hole phenomenon (as shown in the left figure) Cratering is a common coating defect in electrostatic spraying, characterized by circular or semi-circular depressions resembling "volcanic craters" or "meteorite impact zones". These indentations typically measure between 1-3 millimeters in diameter, featuring a deeper center and slightly raised edges that create a distinctive three-dimensional texture. Unlike pinholes – which are small and penetrative – cratering occurs when localized repulsion or shrinkage forces during the curing process cause the coating to collapse. The surrounding material often forms a tiny raised ring around these depressions. The formation of shrinkage cavities is typically associated with variations in surface tension or contamination. When contaminants such as oil residues, silicone-based substances, or other foreign particles exist on the workpiece surface, the wettability of powder coatings in these areas significantly decreases. This leads to coating shrinkage during melting and leveling processes, resulting in cavity formation. Additionally, quality issues within the powder coating itself (such as impurities or mismatched surface tension) and improper process parameter adjustments may also cause shrinkage cavities. Microscopic examination reveals that the center of these cavities sometimes exposes the substrate material, sometimes even showing traces of minor contaminants. These observations further indicate that cavity formation is closely related to surface conditions. In electrostatic spraying, pinholes are not accidental occurrences but direct indicators of inadequate process control. Their distinctive morphology makes them highly visible on coating surfaces, particularly in high-gloss coatings where light reflection accentuates their presence. Whether on metal workpieces or plastic substrates, pinholes may manifest in various forms, with complex geometries and edge areas being particularly prone to them. Therefore, accurate identification of pinholes and understanding their characteristics constitute the first essential step in optimizing spray coating quality.

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• Common mechanical problems in powder coating industry（Two）

  

  Aug 08, 2025

  Resolvent ： Adjust the curing time according to the curing requirements of powder coating: each powder coating has a recommended curing time and temperature, which should be set according to the technical parameters of the coating. Optimize the temperature curve of the curing furnace: gradually heat and ensure the stability of the constant temperature stage, so that the powder coating can be cured in the appropriate time. Regular calibration of curing furnace: ensure that the curing furnace works normally and the temperature control system is accurate.   Bubbles or peeling occur: During curing, if bubbles or peeling appear on the surface of the coating, it is usually due to inappropriate curing conditions or problems with the surface of the substrate. Common causes: Too high or too low temperature: If the curing temperature is not properly controlled, it may lead to the formation of bubbles. Especially when the temperature is too high, the gas in the coating cannot be released in time and bubbles are formed. The surface of the substrate is not clean: If there is oil, water or other impurities on the surface of the substrate, these substances cannot evaporate during the curing process, resulting in bubble formation or coating peeling. Powder quality problems: The use of substandard powder coatings may contain impurities or additives, which will produce bubbles during curing. Resolvent ： Ensure that the substrate surface is completely clean: Clean the surface before spraying to avoid any oil or water affecting the curing process. Reasonable control of curing temperature: adjust the curing temperature according to the requirements of powder coating, avoid excessive temperature fluctuation, and ensure that the coating is cured at the correct temperature. Use quality powder coating: Select powder coating that has passed the test to ensure its stability during curing.  

  Hot Tags : automatic Powder Coating Machine System powder Coating Machine For Metal powder Coating Sprayer coating Spray Machine spray Gun Powder Coating painting Machine powder Coating Gun Powder Coating Machine

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• Common mechanical problems in powder coating industry（One）

  

  Aug 01, 2025

  Problems in the curing process： The curing temperature is not uniform The uneven temperature in the curing process is a major cause of inconsistent coating quality. Too high or too low curing temperature will affect the hardness, adhesion and appearance of the powder coating.   Common causes：  Inaccurate temperature control in the furnace: The temperature control system of the curing furnace is faulty, resulting in excessive or low temperature in some areas of the furnace.   Uneven material arrangement: If the coated objects are not arranged evenly in the curing furnace, some objects may not be heated uniformly, thus affecting the curing effect.   Resolvent ： Regular calibration of the temperature control system of the curing furnace: ensure uniform temperature distribution of the curing furnace and avoid local temperature fluctuations.   Optimize the arrangement of objects: arrange the position of objects in the curing furnace reasonably, avoid dense arrangement, and ensure that each object can be evenly heated.   Use of hot air circulation system: efficient air circulation can help to evenly distribute heat and reduce local overheating or cooling. The curing time is too short or too long Too short or too long curing time will affect the final effect of the coating. Too short curing time may lead to incomplete curing of the coating, resulting in insufficient hardness and poor adhesion; too long curing time may lead to yellowing of the surface and brittle coating. Common causes： The heating time of the curing furnace is not set properly: the temperature in the curing furnace rises too fast or too slow, resulting in too short or too long curing time. Incompatible powder coating types: Different powder coatings require different curing times and temperatures, and the use of unsuitable coatings may lead to unreasonable curing time.

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• Don't let these spray problems ruin your product

  

  Jul 30, 2025

  Powder adhesion is not firm Poor coating adhesion may lead to powder shedding or unevenness. Common causes are as follows: Surface treatment is not complete If the substrate surface is not thoroughly cleaned, rusted or treated, the powder will not adhere firmly and the coating will fall off Resolvent ： . Clean and remove rust in strict accordance with surface treatment requirements to ensure that the substrate surface is clean and free of oil. . Use suitable surface treatment methods such as phosphating, sandblasting, etc.     There are particles and ripples Particle accumulation and water ripple are common defects in the spraying process, which usually show irregular protrusions or depressions on the surface of the coating. The viscosity of the spray powder is too high When the viscosity of the powder is too high, the powder can not be evenly distributed in the spraying process, and it is easy to pile up and form an irregular texture Resolvent ： .Select the right powder coating to ensure moderate viscosity. .Adjust the powder spray amount and spraying pressure of the nozzle to reduce the problems caused by high viscosity of powder. The spraying environment is too humid High humidity environment will lead to powder coating moisture absorption, reduce its flow, and then affect the spraying effect, resulting in water wave or particle accumulation Resolvent ： . Control the humidity of the spraying environment to ensure that the humidity is below 50%. . Use dry powder coatings and avoid using expired or hygroscopic powders in humid environments.  

  Hot Tags : small coating equipment powder spraying machine small powder coating equipment spraying equipment company spraying equipment powder coating gun factory powder coating gun supplier electrostatic spray gun supplier

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• Common problems in the process of spraying

  

  Jul 25, 2025

  Spray unevenness is a common quality problem, which may lead to inconsistent coating thickness and affect the appearance and durability of products. The common reasons are as follows: 1. Unstable spray pressure: During the spraying process, if the pressure of the spraying equipment is unstable, it will lead to uneven powder spray and affect the uniformity of the coating. Common causes include unstable compressed air system, poor connection between the spray gun and the electrostatic generator, etc.  resolvent ： .      Ensure that the pressure of the compressed air system is stable and check it regularly. .      Adjust the nozzle pressure to ensure that the pressure is within the recommended range. .      Check the connection of the equipment to ensure that the voltage between the spray gun and the power supply is stable.     2. The spray gun distance is not appropriate: If the distance between the nozzle and the surface of the substrate is too close or too far, the spraying will be uneven. If the distance is too close, the powder injection amount is too large, which is easy to form accumulation; if the distance is too far, the adhesion of the powder is insufficient, which is easy to produce thin coating or splash.  resolvent ： Adjust the position of the spray gun according to the recommended distance in the equipment manual. The distance between the spray gun and the substrate is usually recommended to be 15-30cm. Adjust the Angle of the spray gun to ensure that the powder can cover the surface evenly. 3. Improper control of powder spray: Too much or too little powder spraying will lead to uneven spraying, too much powder will lead to thick coating, too little powder will lead to uneven coating and poor adhesion.  resolvent ： .     Use the powder flow control function of the spraying equipment to ensure that the powder amount is appropriate. .     Check the nozzle of the spray gun regularly to ensure that there is no blockage and the powder flow rate is stable.  

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• Preparation for spraying

  

  Jul 10, 2025

  1. Surface treatment requirements of substrate Before spraying, the surface treatment of the substrate is very important, which directly affects the adhesion and quality of the coating. Common surface treatment methods include: Cleaning: The substrate surface must be clean without oil, dust, rust and other impurities. Impurities can be removed by chemical cleaning or mechanical cleaning (such as sandblasting, grinding). Oil and water will cause the powder coating to adhere firmly. Rusting: Steel and other metal materials are prone to rust in the process of use. Before spraying, rust should be removed by sandblasting, acid washing or electrolysis to ensure that there is no rust and oxide on the surface. Phosphating treatment: Phosphating treatment for steel, aluminum alloy and other materials can effectively improve the corrosion resistance of the substrate surface and enhance the adhesion of the coating. Phosphating film is a uniform and strong coating, which contributes to the stability of powder coating. Preheating: For some materials, such as aluminum alloys, preheating treatment can improve the adhesion of the coating, especially when spraying in high humidity.   2. Control of spraying environment The control of spraying environment has an important impact on coating quality and spraying effect. The main control factors include: Temperature and humidity: The temperature and humidity of the spraying environment should be kept within a certain range. Usually, the temperature is between 18°C and 30°C, and the humidity is controlled below 50%. Too high humidity may lead to powder moisture absorption, which will affect the spraying effect, and even produce bubbles and cracks. Air quality: The spraying area should be kept clean to avoid dust and impurities polluting the coating. The air should not contain too much moisture and oil and gas to avoid the coating peeling off or bubbles after spraying. Ventilation: The spraying area should be kept in good ventilation, so as to discharge the dust in time during the spraying process and ensure the safety of construction personnel.   3.Selection and storage of spray powder Correct selection of appropriate spray powder is the guarantee of spray quality. The selection of powder should be based on the following points: Types of Powder Coatings: Electrostatic powder coatings come in various types, including polyester powder, epoxy powder, and acrylic powder. Different types are suitable for different application scenarios. For instance, polyester powder is ideal for outdoor product coating due to its excellent weather resistance, while epoxy powder excels in indoor applications thanks to superior corrosion resistance. Particle size: The particle size of powder affects the spraying effect and the flow of powder. Generally speaking, the finer the particles, the more uniform the coating will be, but too small particles may cause splashing during the spraying process. Usually, the particle size of spraying powder is between 20-100 microns. Color selection: Select the appropriate powder color according to your needs. Powder coatings are generally available in a variety of colors and effects, such as matte, gloss or metallic effects. Storage requirements: Dry storage: The sprayed powder should be stored in a dry, cool place, avoid moisture, otherwise the powder may absorb moisture, affecting the spraying effect. Sealing storage: because the powder coating is easy to absorb moisture and occur lumping, it must be kept in good packaging, sealed storage, and avoid contact with air. Validity: Each powder coating has a validity period, expired powder may affect the spraying quality, should be used as far as possible within the validity period.         Common problems in the next stage of coating process

  Hot Tags : Preparation for spraying Surface treatment requirements of substrate Control of spraying environment Selection and storage of spray powder protexus electrostatic spraying system Electrostatic spraying equipment electrostatic paint equipment electrostatic test equipment

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