When starting the etching process of magnesium photoengraving plate, in order to ensure good slope, we shall to make some adjustment as following:
When making letterpress, the speed of the etching machine blade shall be 420-430rpm;
When making a gravure, the speed of the etching machine blade shall be 370-380rpm;
(2) Etching temperature:
When making a letterpress, the temperature of the etching solution is 33-34 ° C when put on the plate; when take it out, the temperature of the etching solution is 38-39 ° C;
When making a gravure, the temperature of the etching solution is 35-36 ° C when it is on the plate; when take it out, the temperature of the etching solution is 38-39 ° C;
(3) Etching time:
Using new prepared etching solution, when the etching time is 5 minutes, the etching depth of the magnesium alloy plate is 0.7-0.8mm;
When using non-newly prepared etching solution, the etching time of the next magnesium alloy plate is gradually extended according to the etching depth of the previous magnesium alloy plate. When the etching depth is reduced by 0.1mm, the etching time is extended by 30-40s;
(4) acid supplement:
After completing the etching of a magnesium alloy plate, acid supplementation is required, and the acid supplementation method includes: 65-75 ml of nitric acid supplementation for each 10 g of etched magnesium alloy weight .
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Henan Huawei Metal Co., Ltd (HWALU for short), a privately-owned enterprises established in 2001, there are 1,200 employees including a R&D team with 26 specialists and covers an area of 200,000 square meters.The International trade department began the export business on 2011, with the sales 12 and annual export about 20000 tons aluminum product.