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What is the difference between sodium silicate sand casting, resin sand casting and coated sand casting?

Release time： 2020-06-23 11:16:00.000

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What is the difference between sodium silicate sand casting, resin sand casting and coated sand casting? In fact, sodium silicate sand, resin sand, resin coated sand although all belong to foundry casting, but their process is not the same; The main reason is that the production process is different because of the different binder and curing agent used.

Sodium silicate sand casting: use sodium silicate as binder and quartz sand to make molding sand by mixing them in a certain proportion, blow carbon dioxide to solidify after molding, then draw the mould, assemble the mould and pour into castings.

Resin sand casting: mix resin as a binder(hardener needed) and quartz sand according to a certain proportion to make molding sand; After the mold is made, it solidifies naturally at room temperature, and then draw the mould, assemble the mould and pour into castings.

Coated sand casting: put the heated quartz sand into sand mixer, add resin, curing agent and anti-caking agent, so that the surface of quartz sand is coated with a layer of resin film;after being evenly mixed, the coated sand is discharged for cooling and crushing for standby use, and it is needed to be heated and solidified during use.

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