Huizhou Aluminum Alloy Die Casting Factory takes you into the era of energy conservation and environmental protection

According to statistics, the total import and export volume of China's hardware industry this year reached US $74.923 billion, with a year-on-year growth of 30.1%. The total export volume was 57.51 billion US dollars, with a year-on-year growth rate of 31.4%; The total import volume was 17.412 billion US dollars, a year-on-year increase of 26%. Experts in the industry said that in the future, they will also guide the adjustment strategy of the whole industry, accelerate the transformation and structural adjustment, and change from export-oriented to" Both domestic trade and foreign trade, and both domestic and foreign markets" And continue to develop the domestic market. The positive driving effect was remarkable, which triggered a comprehensive rebound in the hardware industry, especially in domestic sales, which showed explosive growth, achieving a high-speed growth of 27% in the whole industry

In this regard, experts believe that the opportunities mainly come from the increasing demand for building hardware. With the development of affordable housing projects in China, more and more regions across the country have begun to enter the climax of decoration. The demand for building hardware has warmed up, which has greatly stimulated the development of building hardware products in China

At the same time, with the soaring house prices, houses have already become the eyes of ordinary people“ Luxury”, As for the house buyers, how to treat this enviable“ Luxury” Decoration and dressing is a very important thing. With the improvement of people's living standards, the quality of people's life is also rising all the way. The choice of products is also based on quality, especially for large items such as doors and windows, bathroom, lamps, etc., which are used for a long period of time; Better expensive than abusive”, Therefore, hardware enterprises should strictly control the quality

When there are water lines, cold lines and hot cracks in the die casting, the solution will infiltrate into the cracks during electroplating, and will be converted into steam during baking, and the air pressure will lift the electroplated coating to form bubbles

Solution:

To control the generation of air holes, the key is to reduce the amount of gas mixed into the casting. The ideal metal flow should enter the mold cavity from the nozzle through the splitter cone and runner at a constant speed to form a smooth and consistent metal flow. The tapered runner design is adopted, that is, the runner should gradually reduce from the nozzle to the inner gate at a constant speed to achieve this goal. In the filling system, the mixed gas is due to turbulence and liquid metal mixing to form pores. From the research on the simulation of die casting process in which the liquid metal enters the mold cavity from the casting system, it is obvious that sharp transition positions in the runner and the increasing cross-sectional area of the runner will make the liquid metal flow turbulent and entrained. A stable liquid metal is conducive to the gas entering the overflow tank and exhaust tank from the runner and mold cavity and discharging out of the mold

For shrinkage cavity: it is necessary to make each part of the die-casting solidification process as uniform as possible to dissipate heat and solidify at the same time. Shrinkage can be avoided by reasonable nozzle design, ingate thickness and position, mold design, mold temperature control and cooling

For intergranular corrosion, it is mainly to control the content of harmful impurities in alloy raw materials, especially lead< 0.003%。 Pay attention to the impurity elements brought by the waste

For water marks and cold separation marks, the mold temperature can be increased, the inner gate speed can be increased, or the overflow slot can be increased in the cold separation area to reduce the appearance of cold separation marks

For hot cracks: the thickness of die castings should not change sharply to reduce stress generation; Relevant die casting process parameters shall be adjusted; Lower the mold temperature