Can die casting shape complex thin wall castings. Due to the die casting parts forming process is always filling and solidification under pressure. Peak valley, convex concave contour and narrow slot can die casting out clearly. Die casting, the minimum wall thickness: alloy is 0.3 mm; Alloy is 0.5 mm. Cast out of the hole minimum diameter is 0.7 mm. Cast out the minimum thread pitch of 0.75 mm. For complex shape, difficult or not made of machining parts, even if the output is small, usually adopt the die casting production, especially when the other casting method or other metal molding process is difficult to manufacture, adopt the die casting production is most appropriate.
High productivity. In all of the casting method, the die casting is one of the most productive way. This is mainly decided by the characteristics of the die casting process, and the production process of mechanization and automation car radiator cap degree of further development and improvement. General cold chamber die casting machine die casting of 600 ~ 700 times the average per shift, hot chamber die casting machine die casting of 3000 ~ 7000 times, suitable for mass production, every operation cycle is generally 10 s - lmin, and can achieve more than a mold cavity working hours and equipment. Data is introduced, using a die casting machine production a batch of spare parts, can save 15 ~ 60 sets of metal cutting art, its output is higher.
Alloy die casting production technology: is to molten state or half molten alloy casting the pressure chamber of die casting machine, under the action of high pressure, with extremely high speed filling inside the cavity of metal stamping parts die mold, and make the molten alloy under high pressure cooling solidification molding high benefit, high efficiency of the method of precision casting, alloy die casting for short.
The strength of the alloy die castings and higher surface hardness. Due to the effect of chilling of the die-casting mould and crystallization under pressure, and therefore, die casting surface grain is fine, compact structure. So the surface hardness and strength are high. The tensile strength of casting generally 25% ~ 30% higher than the sand mold casting, but low elongation.
High pressure and high speed is die casting molten metal filling two big characteristics of forming process, is also the most fundamental difference between die casting and other casting method. Die casting often used injection pressure in several MPa or MPa range, even up to 500 MPa, filling speed; within the range of 0.5 ~ 120 m/s Fill time is very short (associated with the size and wall thickness of the casting), generally is 0.01 ~ 0.28, the shortest only a few parts per thousand. In addition, the size of die casting mould with high precision and low surface roughness. Because has the characteristics of alloy die casting production compared with other methods of casting, alloy die-casting manufacturers for your analysis has the following advantages:
Alloy die castings of high dimensional accuracy and surface roughness deep draw stamping requirements. The casting dimension accuracy is IT12 ~ IT11; Surface roughness Ra commonly is 3.2 ~ 0.8 p.m., a minimum of 0.4 PM. Therefore, general die casting can not after machining or just individual parts processing can be used.