How many kinds of hardening methods are there for sand casting? Steel casting manufacturers to answer your questions!
Release time:2023-10-14
How many kinds of hardening methods are there for sand casting? Steel casting manufacturers to answer your questions!
Now the casting products used in the market, most of them are made of water glass sand, and some products are made of lost mold casting or forging, although the casting method is not the same, but the purpose is the same, that is, to produce high-quality casting products.
Some steel casting manufacturers in the production of products, will choose to use sand casting for production, then the chemical hardening plays a very important role, generally will use three ways to harden: (1) heating hardening; (2) Self-hardening; (3) Fog hardening.
1, heating hardening: this hardening method, is to add adhesive or hardener when mixing sand, and then wait until after molding and then heating, at this time there will be some components of the chemical reaction, so that the sand mold or core hardening effect, this method is generally more suitable for the big gear in the shape of the core operation.
2, self-hardening: This method is that the steel casting manufacturer will add adhesive and hardener at the same time when the sand is mixed, when the sand and core are made, the adhesive will react under the action of hardener to make the sand core or core itself harden. This method is generally more suitable for larger castings or small batch castings.
3, fog hardening: This method is also to add adhesives and other auxiliary materials when mixing sand, so that after its modeling, the steel casting manufacturer then blows into the gaseous hardener, which can be dispersed in the sand or core, and can also lead to the hardening of the product.
