Coating oxidation coloring and electrostatic spraying process

2 Product inspection 2.1 test method test of film performance shall be carried out 24 hours after the coating is cured a Coating thickness monitoring method: use a film tester to monitor the coating thickness b Coating impact resistance test method: use punch with a diameter of 16mm, place the hammer at a proper height and drop it freely, and directly impact the coating surface to produce a pit with a depth of 2.50.03mm Observe the coating change c Test method of coating adhesion: mark the coating surface with a spacing of 2mm, and then paste and tear it with adhesive tape to observe whether the coating falls off d Cupping test method use the spherical top of the punch to push towards the sample at a constant speed of 0.2-0.1mm per second until the specified value is 0.750.05mm Observe whether the coating has fallen off or separated from the profile 2.2 inspection equipment a ed-200 eddy current thickness gauge B impact tester C Cup Tester d.4x magnifying glass (for observation) 2.3 inspection results according to the national inspection standards for aluminum alloy powder coated profiles, crystal coated aluminum profiles can fully meet the use requirements The test results are shown in the chart: crystal mask optical profile product test table test item sample 1 sample 2 sample 3 film thickness test (test value) 50.8um 57.4um 52.6um adhesion test no film falling off, coating crystal, high transparency film no falling off, impact test film no fission film no fission film no falling off No fission of the film layer, no fission of the film layer, no separation of the coating from the formation, no fission of the 0-level film layer, no separation of the coating from the formation, no fission of the 0-level film layer, no separation of the coating from the formation, no quality problems of the 0-level product during the use period After one year's test, the profile will be placed for one year, the surface is still smooth and transparent, and the detection is level 0 There is no fading and peeling phenomenon, the film thickness is higher than that of electrophoretic coating, the cost is basically the same, and the oxidation spraying production line is organically combined to avoid isolated production of equipment 3 The quality problems caused by the general quality problem treatment are mostly caused by the lax production control The main problems are as follows: 1 The profile is not bright; 2 The quality of high gloss transparent powder; 3 The oven temperature is too high and the film thickness is too low; 1 The amount of powder produced by the spray gun is small; 2 Check the powder supply device and the air pressure surface layer for peeling; 1 The film thickness is too high; 2 The powder is affected by moisture; 3 The coating particle size is too coarse, the coating leveling performance is poor, and the adhesion is poor 1 The coating quality is poor 2 The oxidation and coloring film holes are completely closed before the coating hanging 3 The profile surface is polluted 4 The drying temperature is too low, and the time is too short 1 The conductivity is poor 2 The coloring bath temperature is low, and the bath liquid is invalid 3 The coloring machine is faulty 4 The oxide film thickness is too low 4 Conclusion The production process of crystal shade aluminum profile is relatively complex, which runs through the oxidation coloring scenic spot spraying; the process must be strictly controlled to produce high standard products, which are accepted by customers