The oil spill and organic impurities on the surface of the bath can also be reduced by the overflow of the bath, but more chemicals need to be consumed. The bath has a certain capacity to contain dirt. Beyond this limit, the cleaning agent will fail and require oil-water separation or reconstitution of the cleaning solution. Otherwise, it will seriously affect the quality of cleaning, affecting the subsequent processes, resulting in more manual processing or rework. Factors affecting the life of the bath, in addition to the performance of the cleaning agent itself, include the chain speed, the volume and type of the workpiece, and the type of oil being removed. The process parameters that need to be controlled for degreasing and degreasing include time, concentration, temperature, mechanical action, draining time, tank grease content, impurity content, and degree of contamination of the water wash. These items must be monitored and recorded to maintain them within normal parameters. It is also necessary to carry out daily and periodic maintenance of the cleaning equipment to ensure that the circulation lifting system, the heating system, the tank body, the nozzle, the oil-water separator and the like are in normal operation and exert maximum effect under the production state. Washing after washing is to remove residual alkaline cleaner and loose grease, usually tap water at room temperature. Finally, it is best to use fresh tap water for washing. If the cleaning is not thorough, the surface is not cleaned or the dirt remains, which will lead to coating defects, affecting the coating adhesion, final coating performance and coating decoration effect, resulting in the repair of the workpiece and even the scrapping of the product. It is recognized that good coating quality requires high quality pretreatment to ensure that high quality pretreatment requires a high performance degreaser.
In order to obtain the best cleaning effect, the bath should be strictly controlled within the process parameters, and often the tank should be dredged, and the difficult-to-clean workpiece can be pre-wiped. The two cleaning tanks work better than one cleaning tank and save on chemicals. Large degreasing tanks should be equipped with oil-water separation devices. For the coating with high quality requirements, it is also necessary to equip the iron powder device and set up a separate hot water washing process before degreasing. Specific details need to be considered during the design phase.
4. It is expected that cleaners with low alkalinity and low working concentration should be used as much as possible. Under the same conditions, the lower the concentration, the less the consumption, the more the cleaning agent is saved, and the less the consumption of water washing, the more economical. A waterless cleaning agent has been developed and put into production practice. The cleaning agent has the same performance and cost as the washing detergent, but can save about 30% of water, and the amount of sewage treatment is greatly reduced.
The liquid cleaning agent has been used on a large scale, which can meet the automation requirements of dust-free operation in the painting workshop, automatic dropping of the drip pump, and solve the problem that the powder is not easy to dissolve and agglomerate and block the nozzle of the pipeline. At the same time, the sedimentation at the bottom of the tank is greatly reduced, and the number of tank cleaning is reduced.
From a quality perspective, it is recommended that large automakers manage all aspects of automotive panels. For pre-treatment, on the one hand, it is required to select an appropriate cleaning agent according to the condition of the plate grease, and on the other hand, the type of anti-rust grease required by the supplier to supply the plate is relatively stable, and it is preferable to develop a special anti-rust grease by the manufacturer.
Mechanical action is beneficial to improve the quality of cleaning. Applications such as spray and ultrasonic can reduce chemical concentrations, reduce chemical consumption and emissions, and reduce environmental impact.
With the improvement of environmental protection requirements, biodegradable surfactants are currently being researched and applied. For active agents, cleaning agents require no phosphorus, no silicon and low COD/BOD emissions. Although research work in this area has been carried out for more than 30 years, there is currently no requirement for a phosphorus-free additive to simultaneously ensure decontamination capability, no harm to the human body and the environment, potential hazards, and low cost. Phosphorus-free degreasers have now been developed, but at a high cost, there is still some resistance to the application.
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Yupdeng Smart LED Down Light
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Founded in 2004, Jiangmen YIDENG Lighting Technology CO., LTD has evolved into a global company that designs, engineers and manufactures innovative and decorative lighting solutions with a new sustainable LED collection for residential, retail, hospitality, museum, industrial and commercial applications.
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