How to prevent the brake disc from contracting loose
TIME：2020.04.08
This paper introduces how to prevent the brake disc from shrinkage porosity: shrinkage porosity is a common defect of brake disc, and its performance and safety are greatly affected for brake disc safety parts. So how do we prevent the brake disc from contracting when we use it? First, liquid iron can be introduced into the Ingate to reduce the overheating of the local plate and prevent the formation of artificial hot spot. According to the viewpoint of balanced solidification of iron castings, the more thin-walled small pieces, the greater the shrinkage value, the more emphasis should be placed on feeding. Feeding method can be used feeding gating system feeding, can also be set up riser feeding. When the feeding scheme of the gating system is adopted, the sprue pressure head can be appropriately increased, such as increasing the top box height and adding gate ring, etc. , the inner gate should be of short, thin and wide shape, the short runner should be close to the casting, it is affected by the heat of the casting and the runner, and the effect of liquid iron filling, shrinkage and circulation, the INGATE can not be solidified and sealed ahead of time, and it can be kept smooth for a long time. Thin can prevent the contact hot spot from forming at the Ingate leading-in place. If the brake disc has serious shrinkage, the riser can be set up for feeding, the riser can be set at the beginning of Ingate as far as possible, or the riser can be set at the middle core to feed the plate on one side of Ingate. For the thin-walled small parts, the second inoculation method can be used, that is, inoculant is added into the small package for instantaneous inoculation, which can improve the inoculation effect, promote the graphite nucleation and growth, add to the bottom of the package and wash into the molten iron. Xiangyuan auto parts main products are: Brake Drum, wheel hub, brake disc, brake shoe and other domestic, imported cars, semi-trailer, full trailer chassis accessories, a complete range, stable and reliable quality. The company not only has established long-term and stable cooperative relations with heavy duty truck, Fuhua and other large vehicle factories, but also exports to the Middle East, America, Europe, Africa, Southeast Asia countries and is deeply trusted by customers.
