What is Water Glass Casting

Water glass casting is also called sodium silicate casting. Its casting process is very similar to investment casting (that is the lost wax investment casting method). It is a technology that uses water glass as the binder for the shell to cast. The process provides a far superior surface finish and dimensional precision to that achieved through118bet.net金博宝app 。并且可以实现更复杂的形状。


It is particularly suited to larger castings and is cheaper to produce. The raw materials are mainly steel and iron.

The Water glass casting technology is from Russia. Now it is one of the most common investments casting过程in China. About 75% of foundries focus their business on water glass casting. the rest are silica sol casting factories.

Benefits of water glass casting

JC Casting is a water glass casting manufacturer and supplier. We have a wealth of experience in manufacturing water glass components.


  • Superior surface finish than sand casting.
  • Greater dimensional precision than sand casting.
  • Achieve more complex parts.
  • 比传统投资铸造方法适合更大的零件。
  • Cheaper than investment casting.
  • Short Lead time than investment casting.
  • Greater choice of metals.
  • 环境优势。(蜡完全可回收。)

Water Glass Investment Casting Process

The difference between the lost wax method and water glass casting is simply the way the wax is removed from the ceramic mold:

投资铸造使用高温高压灭菌来融化蜡,而: -
In Water glass casting the molds are submerged in hot water to remove the wax. The wax is then melted away from the molds and it floats on the surface of the water. This then allows for it to be skimmed off and reused for wax-making purposes.

Obviously, this also provides environmental advantages and the wax is completely recyclable.


For each casting desired, the melted wax is injected into a mold to produce a wax pattern of the casting. The wax molds are made of Aluminum and sized to account for shrinkage in the wax and metal that are being used. Wax tooling ranges from simple two-piece dies to multi-cavity automated dies and complex dies featuring water-soluble or ceramic cores.


Step 2: Wax Assembly

Once the wax patterns have cooled and settled to a stable size and shape. They will be mounted onto a sprue or tree. The sprue which is also made of wax contains all of the necessary gates, runners, and supports to adequately feed the part during the casting process





Step 4: Dewax

Once the shell has fully dried, The shells can be fired to remove any remaining wax residue and cure the ceramic shell. After the shells have been fired, they are ready for the casting pouring


Step 5: Pouring






JC Casting Water Glass Casting Parameters

Applicable Material 铸钢,铸铁,不锈钢,结节铸铁,高铬铁,高锰钢,合金钢,非有产钢合金,耐热钢
Material Standard GB, ASTM, AISI, DIN, BS, JIS, NF, EN, AS, ARR
Weight 0.02kg-50kg
宽容 CT 5~7
Surface Roughness Ra 6.3
年产量 1200T
Application 汽车,摩托车,阀门,海洋,机床,硬件,铁路,齿轮,叶轮,泵,炼油机,电动机,矿物机械,工程机械,变速箱机械,林业机械,公共设施等。
Drawings software Pro/E,自动CAD,SOLIDWORK,CAXA UG,CAD/CAM/CAE。
Machining Turning, milling, drilling, grinding, threading, NC, etc.
精加工 喷砂、抛光、电镀、酸处理、anodizing, painting, etc.

Download the document: What is Water Glass Casting?



The water glass casting process was introduced to China in the mid of 1950s. It is different from the ethyl silicate binder investment casting process. Due to the advantages of material cost and short production cycle. The water glass casting was quickly applied in civil machinery manufacturing. With the fast development of the water glass casting process in China for more than 70 years. Its production scale and application field has become the mainstream investment casting industry.

By adding 0.5% penetrant, the surface quality of water glass casting is greatly improved. The surface finish can even be comparable to the silica sol casting technology. It can avoid defects caused by traditional shell-making technology. At the same time, the working environment is improved obviously.


Water glass casting Applications

Water glass cast components are mainly used for heavier or stronger, more complex shapes products. These applications are in the field of trailers, agricultural machinery, and the offshore industry. The process provides a far superior surface finish and dimensional precision than sand casting. It also allows for more complex shapes to be achieved. Besides steel, it is possible to cast alternative materials. Such as regular iron using this method.


Water glass casting inquiry

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