Dongguan Da Ling Shan Chang Sheng processing hardware store to resolve deficiencies solutions: control stomata produce, the key is to reduce the amount of gas within the mixed cast, the ideal metal flow should continue to accelerate through the shunt by the nozzle cone and runner into the cavity to form a smooth and consistent direction of metal flow, tapered channel design, which should continue to accelerate the flow of water from the nozzle to the gate inward gradually decreased, can achieve this goal. In the filling system, the mixed gas is due to turbulent mixing with the molten metal to form pores, from a study molten metal casting system into the mold cavity by casting simulation process, the apparent runner sharp transition bit and incrementing the pouring channel cross-sectional area, would appear to make the metal flow turbulence and volume of gas, liquid metal can help smooth the gas into the overflow tank and exhaust ducts from the sprue and cavity discharged outside the mold. Dongguan Da Ling Shan Chang Sheng processing hardware store zinc and aluminum die casting is ── kinds of zinc die casting parts as the main component. This part surface ── very dense surface layer, which is the evacuation of the porous structure, but also a lively amphoteric metal. Therefore, only the use of appropriate pre-treatment methods and plating process, zinc alloy plating to ensure good adhesion on Pearl zinc alloy die, meet the requirements of qualified products. Plating zinc alloy commonly used for ZA4-1, the main component: aluminum 3.5% to 4.5% copper 0.75% to 1.25% 0.03% 0.08% magnesium Guangdong zinc alloy products, the balance being zinc, the sum of impurities ≤0.2 %. The amount of copper-zinc alloy 925 high grades, but also easy to plating. Typically, the density of zinc alloy is 6.4 ~ 6.5 g / cm, if the density of <6.4 g / cm supply zinc alloy jewelry, prone to blistering and pitting after plating. In short zinc alloy, when the selection must strictly. In addition, die-casting mold must be designed to avoid to bring insurmountable plating defects (such as pitting). Which strong zinc alloy die _ Chang Sheng Hardware (certified) _ zinc alloy provided by Dongguan Da Ling Shan Chang Sheng processing hardware store. Dongguan Da Ling Shan Chang Sheng processing hardware store (shop1379091614724.1688.com) is Dongguan, hardware accessories leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Chang Sheng Hardware in leadership with the staff warmly welcome all inquiries negotiations to create Chang Sheng Hardware a better future.