Roots Blower For Electroplating Equipment: The purpose of stirring the electroplating bath is to make the temperature of the solution in each part of the bath uniform, and the solution composition around the workpiece can be constantly updated to maintain the best current density and deposition speed; In addition to the oil tank liquid stirring, is to the workpiece surface attached to the dirt and saponified, emulsified grease washed into the tank to be removed in time, in order to improve the effect of oil removal.
The purpose of stirring the electroplating bath is to make the temperature of the solution in each part of the bath uniform, and the solution composition around the workpiece can be constantly updated to maintain the best current density and deposition speed; In addition to the oil tank liquid stirring, is to the workpiece surface attached to the dirt and saponified, emulsified grease washed into the tank to be removed in time, in order to improve the effect of oil removal.
This is the most common and simplest solution stirring method, can stir the solution very evenly. The air used must be filtered oil-free compressed air, because the air stirring on the solution of the larger, for some plating kind of hard to avoid the anode sludge moved to the cathode and attached to the above, so that the coating surface burr, so these solutions must be often filtered, it is best to use continuous filtration.
Compressed air mixing tube can use steel tube, plumbing or hard polyvinyl chloride (PVC) plastic tubes, generally divided into - horizontal straight pipe at the bottom of the tank, slit into the air by bending down to the bottom of the channel, in letter, and three horizontal tube with two rows of holes, the upward slant hole, the center line of the two hole into 900, cant make compressed air jet after two, to make solution flow. The distance between each hole is 80mm ~ 130mm, and the sum of the area is about 80% of the cross-sectional area of the mixing tube. For small and medium-sized notches, the gas supply pipe can be used with a nominal diameter of 20mm ~ 25mm pipe. The bottom of the mixing tube is about 25mm away from the bottom of the tank. The consumption of compressed air can be calculated according to the surface area of the solution. For medium agitation, about 0.8m3 / min of compressed air is required per square meter of liquid surface; The required compressed air pressure can be calculated at 0.016 MPa per meter depth.
Electroplating solution stirring generally uses low pressure oil free compressed air, there is no need to dehydrate the high pressure compressed air to remove oil and then depressurize the use, so the consumption of energy is low, easy to use.
Oil-free compressed air equipment is usually used in the laminated centrifugal air pump, vortex air pump and roots blower three. The working principle of the laminated centrifugal air pump is equivalent to a number of small centrifugal blower rotating impeller and fixed casing in series together, high-speed air flow through the step-up pressure, in order to improve the outlet pressure, supply plating tank mixing needs; The impeller of the vortex air pump is composed of dozens of blades, similar to the impeller of a turbine. When the impeller is rotating at high speed, the air between the blades is affected by centrifugal force to the surrounding movement into the annular cavity of the pump body, and the air repeatedly accelerates the circular motion between the blades and the annular cavity, leaving the air pump with very high energy for use; Roots blower is the use of a special curved section of the mutual engagement of the two drums, in the drum precision with a closed shell of high-speed rotation, the air from one side of the meshing of the two drums to the other side.
These kinds of gas supply equipment are high-speed mechanical equipment, which, like high-pressure air compressors, also have noise problems. The noise decibel data of each factory is not indicated on the technical performance index, but it is generally about 60dB from the experience of electroplating production site. In addition to the equipment itself with a silencer, its installation site should also take sound insulation measures.