Silica sol precision casting will inevitably encounter some problems in the production process. One of the most frequently encountered problems is the appearance of pores inside the product. For some parts with higher requirements, pores in the interior are not allowed. Therefore, the silica sol precision casting process needs to prevent pores.
When silica sol precision casting faces relatively complex thin-walled castings, in order to effectively improve the air permeability of its precision casting shells, the vent holes can be set up directly at high places during the production process, and the vents can be set reasonably. Gating system.
In this way, silica sol precision casting can effectively prevent the pouring of entrainment gas, which is conducive to the discharge of gas in the cavity. During the pouring process, the pouring temperature can be appropriately increased, and the distance between the furnace and the pouring cup can be reduced as much as possible, and the pouring speed also needs to be reduced.
