NNX-S356 Factory direct sale car wheels rims 5 holes forged car rims aluminium forged wheels 5×120

NNX-S356 21X9.5 21X11 ET 33 45 P.C.D 5X112 center hole 66.6 2piece forged wheel (custom 18-24inch any date)

Advantages of low-pressure casting

Generally speaking, the casting hub can be divided into two manufacturing processes, namely gravity casting and low-pressure casting. The former has simple manufacturing process, that is, liquid alloy is poured into the mold for cooling and forming. Because the mold is durable and the construction method is simple, it is the lowest cost manufacturing method; The latter uses low pressure to press the liquid alloy into the mold, so that the molecules are evenly distributed, the pores are small, and the metal density is high, so the strength is stronger, the safety factor is higher than the former, and the shape can be more complex and refined.
Due to technical reasons, low-pressure casting is essentially superior to gravity casting:
1. Better balance: the hub and its dynamic balance and roundness are good. The dynamic balance performance of the inner and outer wheel diameters less than 30g is far lower than that of the traditional gravity casting method. The data of the traditional gravity casting method is more than 45g-60g, making the low-pressure casting hub more stable in driving.
2. Tighter organization: the internal organization of the hub can be made more compact, and the safety is greatly improved by equalizing the pressure into the hub mold. Traditional gravity casting generally has no pressure transmission and the hub structure is loose.
3. Higher strength: low pressure casting method, using low pressure feeding, greatly increases the strength of the hub. Most of the wheels of the original vehicle are low-pressure cast, which proves that the strength performance of the traditional gravity casting is unstable.
4. Higher safety: the pressure delivery system of low-pressure casting will not be affected by the environment and climate change, and can produce products with safe and stable quality all year round. Traditional gravity casting is generally affected by climate, temperature and humidity, and the product quality is unstable.