Selection GuideThe low cost of small sample powder spraying in the laboratory is not to make the equipment as simple as possible, nor to arbitrarily reduce the amount of powder, voltage or curing conditions, but to reduce the powder loss, color change cleaning time, sample rework and invalid repeat tests in a single test under the premise of meeting the safety, film thickness, appearance and test purposes. The special powder electrostatic spray gun for laboratory is more suitable for powder formulation verification, color proofing, sample confirmation, small piece test spraying, process window exploration and customer sample test. Fixed voltage, air pressure, powder volume, gun spacing or cost saving ratio should not be given until the specific gun model, powder cup/bucket structure, powder type, specimen size, target film thickness and laboratory safety configuration have been confirmed.
Selection GuideThe industrial electrostatic rotating cup spray gun is suitable for large batches of paint spraying. The core reason is not that "any scene is better than an air spray gun", but in continuous production, it can achieve high coating efficiency, stable film thickness consistency and better paint utilization management through high-speed rotational atomization, electrostatic adsorption, stable paint supply and automatic trajectory control. It is more suitable for automotive parts, home appliance shells, metal products, construction machinery parts, profiles, plates and other batch, repetitive, articulated spraying scenarios. Scenarios with small batches, frequent multi-color switching, many complex dead corners, on-site safety and insufficient paint supply conditions should not simply use the spinning cup as the default first choice. Fixed speed, flow, high pressure or forming gas parameters should not be given until the specific rotating cup model, paint system, workpiece structure and production line conditions have been confirmed.
Selection GuideThe powder electrostatic spray gun can not be adjusted to increase the voltage, increase the amount of powder or pursue the "big powder fog" according to the feeling. The more secure order is: first confirm the safety, grounding, air source, powder fluidization and powder discharge stability; then gradually adjust the powder volume, conveying gas, atomization gas, voltage, current limit, gun distance, angle, gun speed or automatic line beat according to the workpiece structure, target film thickness and appearance requirements; finally verify with film thickness, appearance, powder consumption, rework rate and a qualified rate. A common set of fixed parameters should not be given until the specific gun model, controller version, powder type and workpiece structure are bound.
Selection GuideThe point of metal powder spraying is not to open up the powder mist, but to keep the metal effect, film thickness and color consistent. The site should first confirm the powder type, sample standard and customer appearance requirements, and then control the powder fluidization, spray gun powder volume, conveying air/atomized gas, electrostatic parameters, gun spacing, angle, gun speed, pendant direction, curing conditions and recycled powder ratio. Metal powders are more prone to problems such as color difference, flowering, cloud spots, corners shining, uneven metallicity, and color drift of recycled powder than ordinary solid powder. Fixed spraying parameters should not be applied directly before the powder grade, gun model, workpiece structure, target film thickness and prototype are confirmed.
Selection GuideFluorocarbon powder spraying wants to achieve the highest cost performance, not to buy the powder at the lowest price, nor to press the film thickness to the minimum, but to reduce the unit qualified area cost under the premise of meeting the customer's weather resistance, appearance, film thickness, adhesion and curing requirements. The site should focus on six things: selecting the right powder system and application grade; stabilizing the pretreatment; establishing a film thickness window with representative workpieces; adjusting the amount of powder, airflow, electrostatic parameters and gun distance to "uniform deposition" instead of "large powder fog"; managing the ratio of new powder to recycled powder, sieve powder and color change loss; and verifying the cost with the curing curve and the first pass rate. Fixed spraying parameters or savings should not be given until powder grade, target film thickness, workpiece material, curing conditions and customer standards have been confirmed
Selection GuidePowder spraying shows orange peel marks, which should not only be blamed on the spray gun, but also on the poor quality of the plastic powder. The orange peel pattern is usually associated with film thickness, powder leveling performance, spray gun powder output, delivery gas/atomization gas, voltage current, gun spacing, gun speed, workpiece temperature, curing conditions, pretreatment, and powder batches. The site should first confirm whether the orange peel is an "unexpected defect" or a decorative effect required by the texture powder, sand grain powder, and wrinkle powder itself selected by the customer; then check in the order of "film thickness — powder — spray gun parameters — curing — pretreatment — site environment". It is not recommended to give fixed voltage, air pressure, temperature or time values before confirming the powder grade, target film thickness, curing curve and workpiece structure.
Selection GuideEnglish summary is being prepared. The full article is available in Chinese.
Selection GuideManual powder electrostatic spray gun spray powder, usually do not immediately judge that the spray gun is damaged, the high-pressure bag fails, or the controller is unstable. The so-called "spitting powder" is discontinuous in most cases, and the more common reasons are poor powder fluidization, excessive powder volume settings, powder tube bending and accumulating powder, powder pump or venturi tube wear, compressed air with water and oil, and concentrated spraying of powder tube residue after gun stopping. When troubleshooting, you should first confirm when the spitting powder occurs: whether it is a flush of powder at the moment of shooting, a large flush of small flush during the spraying process, or a sudden flush of powder after stopping the gun. The reasons and treatment methods for different manifestations are not the same.
Selection GuideThe electrostatic spray gun does not powder, not necessarily the high-pressure bag is broken. The site should first distinguish between two situations: first, the muzzle itself does not emit powder or powder intermittently, which usually gives priority to checking the air source, fluidization, powder pump, powder pipe, nozzle blockage and powder status; second, the muzzle has continuous powder fog, but the powder is not on the workpiece or poor adsorption, then focus on checking the grounding, electrodes, nozzle pollution, high-voltage cables, controller high-voltage output and high-voltage packages. The stronger signals of high-voltage package damage are usually high-voltage cannot be established, the actual voltage/current is abnormal, high-voltage alarm as soon as it is turned on, abnormal discharge, coke taste, ablation and carbonization, loss of pressure after heat engine, or failure with high-voltage module after single-variable replacement of the same model. Before completing these isolations, damage to the high-pressure package should not be directly judged.
Selection GuideWhen electrostatic plastic powder is seriously wasted, do not directly increase the voltage, reduce the amount of powder or replace the spray gun. It should first be confirmed which part of the "waste" occurs: excessive spraying, no first adhesion of powder, poor recycling of over-sprayed powder, large loss of color change and cleaning, excessive film thickness, rework and scrapping, or unclear metering caliber. The site should take the powder consumption of the unit qualified product as the core indicator, and compare the same conditions with the film thickness, coverage, recycled powder status, powder accumulation in the spray room and rework rate. Common troubleshooting directions include poor grounding, excessive powder fog, excessive gas delivery, inappropriate voltage or current restrictions, unstable gun spacing and angle, unreasonable pendant density, mismatched spray room air volume, damp powder clumping, powder pump powder tube wear, and improper management of recycled powder
Selection GuideCommon signs of possible damage to the electrostatic high-voltage package include: the actual voltage cannot be established after the controller sets the high-voltage; the voltage or current display abnormal jump; the alarm, short-circuit protection or overcurrent protection as soon as the high-voltage is turned on; there is no obvious charge adsorption at the spray gun end and the powder path is normal; abnormal discharge sound, coke odor, ablation, carbonization or breakdown traces occur near the spray gun or high-voltage line; the pressure is lost after a period of operation, and the cooler is briefly recovered; the failure still exists after replacing the same model, confirmed normal spray gun cable or gun body. The above can only indicate that the high-pressure bag is "highly suspicious" and cannot be directly confirmed. The actual isolation shall be in the order of “Ground — Powder — Electrode/Nozzle — High Voltage Cable — Controller — High Voltage Package”.
Selection GuideThe core function of an electrostatic powder spray gun is to stably deliver powder to the nozzle, giving the powder particles an electric charge. The electric field between the spray gun and the grounded workpiece then guides the charged powder towards the workpiece surface for deposition. The movement of the powder is not solely determined by electrostatics; the airflow, particle inertia, workpiece geometry, grounding status, and powder properties all contribute to the final result.
Selection GuideEnglish summary is being prepared. The full article is available in Chinese.
Selection GuideEnglish summary is being prepared. The full article is available in Chinese.
Selection GuideEnglish summary is being prepared. The full article is available in Chinese.
Selection GuidePractical guidance based on common on-site issues, covering diagnostic methods, parameter recommendations, and equipment selection boundaries.
