Diecasting压力铸造

1、 DIE CASTING 凌博 刘龙飞 刘昕捷 What is die casting? What is the process of die casting? Two types of the die casting machines? What are the advantages and disadvantages of die casting?What is die casting? Die casting involves the preparation of components by injecting molten metal at high pressures into a

2、metallic die.What is the process of die casting? The casting cycle starts when the two parts of the die are apart. The lubricant is sprayed on the die cavity manually or by the auto lubrication system. The two die halves are closed and clamped. The The required amount of metal is injected into the d

3、ie. required amount of metal is injected into the die. After the casting is solidified under pressure the die is opened and the casting is ejected.Two types of the die casting machines: Hot chamber die casting Cold chamber die casting (热室压铸) （冷室压铸）Hot chamber die casting型芯可动模顶出销模穴固定模熔融金属铸件喷嘴鹅颈管柱塞入口C

4、old chamber die casting型芯顶出销可动模固定模柱塞铸勺模穴铸件What are the advantages and disadvantages of die casting?Advantages of die casting: Excellent dimensional accuracy. Smooth cast surfaces . Thinner walls can be cast as compared to sand and permanent mold casting (approximately 0.75 mm or 0.030 in). Reduces o

5、r eliminates secondary machining operations. Rapid production rates. Casting tensile strength as high as 415 MPa.Disadvantages of die casting: Casting weight must be between 30 grams and 10 kg. Casting must be smaller than 600 mm . High initial cost. Limited to high-fluidity metals. A certain amount of porosity is common. Thickest section should be less than 13 mm. A large production vo