| DUAN Guo-fa.Improving the Yield Rate of Aluminum Cartridge Cathodic Electrophoretic Coating[J],44(8):126-129 |
| Improving the Yield Rate of Aluminum Cartridge Cathodic Electrophoretic Coating |
| Received:March 26, 2015 Revised:August 20, 2015 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2015.08.023 |
| KeyWord:aluminum cartridge cathodic electrophoretic coating yield rate pretreatment special hanger film defect |
| Author | Institution |
| DUAN Guo-fa |
Chongqing Jialing Special Equipment Co. , Ltd, Chongqing , China |
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| Abstract: |
| Objective Through the optimization of parameters for aluminum cartridge pretreatment and cathodic electrophoretic coating process, designing special racks etc. , the yield rate of painting products was improved. Methods Defect analysis was conducted for aluminum cartridge defective film. According to the basic principle of cathodic electrophoretic coating, the effects of relevant process parameters of electrophoretic paint on the properties of aluminum cartridge electrophoretic paint and coating were clarified. The construction bath temperature was adjusted to 29 ~31℃, the work voltage was 170 ~175 V, the bath solid content was 13% ~15% , the conductivity of the bath was 900 to 1300 μs/ cm, the conductivity of the anode solution was 500 to 700 μs/ cm, the film drying temperature was 175 ℃, and the drying time was 29 ~ 30 min. The aluminum cartridge pretreatment process was analyzed, and the influencing factors for matrix blackening and film binding problems during aluminum cartridge pretreatment were clarified. Results The test showed that by reducing the alkali content by 10 ~15 g/ L and the temperature of the hot washing water by about 10 ℃, the complete removal of oily dirt could be ensured and the substrate metal was not corroded and became black. At the same time, according to the material and structure characteristics of aluminum cartridge, special hanging tools were designed to ensure the consistency of the conductivity of the paint. After adjusting the technical parameters of the elctrophoretic paint, the film thickness uniformity was under control, the problems such as obvious color difference on the cartridge and poor binding of the film were solved, the appearance quality of the product was significantly improved, and the assembly film showed no shedding phenomenon. Conclusion Through the parameter optimization of pretreatment and electrophoresis coating process, strengthening the process monitoring, using the improved hanger, the yield rate of the aluminum cartridge cathodic electrophoretic coating was greatly improved. |
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