1. Technical standard: BS EN 10202, DIN EN 10203, GB/T2520 , JIS G3303 Laser Effect Laminated Tinplate Laser Effect Laminated Tinplate,Tin Plate Sheet Lacquered,Tin Coating, Jiangsu Guolian New Material Co., Ltd. , http://www.cntinplate.com
There will be bubbles in the production process of the building fasteners, resulting in rounded sand holes on the surface or inside of the finished product, which will affect the quality of the building fasteners. In order to improve the brand image of the construction fasteners, Defa Casting has improved its technology.
If you want to solve the problem, you must find out the cause of the problem and correct the medicine to improve it. The reasons why the construction fasteners produce air holes are as follows:
1. The small furnace material is wet, rusted or oily, so that the molten iron contains too much gas and is seriously oxidized;
2. The iron outlet, the iron outlet, the lining, and the ladle lining are not dried;
3, the pouring temperature is low, so that the gas does not come up and escape;
4. The aluminum content in the charge is high, which is easy to cause hydrogen holes;
5. The sand type has poor gas permeability, the molding sand has high moisture content, and contains more coal powder or organic matter, so that a large amount of gas is generated during pouring and is not easily discharged.
In order to avoid the generation of pores and improve the yield of finished products, Defa Casting has improved the production process and strictly controlled the quality of the charge and sand. The main points are as follows:
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2. Steel type: MR, SPCC
3. Thickness: 0.115 - 0.50 mm
4. Width: 600 - 1050 mm
5. Length: 600-1200mm
Tin Coating: ordinary 2.8 or 2.8g and 5.6g or 5.6g, we can produce according to customer's requests
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Improved process to prevent air bubbles from appearing during construction of building fasteners