Water Glass Casting


Water glass casting (which also called sodium silicate casting) is a technology of Russian origin. This technology is mostly used for steel and stainless steel components. By using this technique more complex designs can be made compared to the sand casting technique. it is for big size products more interesting, compared to silica sol castings, however less precise in dimensions.Water glass (sodium silicate) is used to cure the ceramic layers. This substance is added to the crusher wear parts.It is then placed in a bath with a water chloride solution. The water glass  reacts to this solution in the bath, thereby curing the layer. This layering process is repeated a number of times until the layer is sufficiently thick enough for pouring. If necessary, a smoother casting surface can be achieved by using the first ceramic layers as it is used in the silica sol technique. Only it will take longer to make the shell.

Our sodium silicate process casting equipment are: wax injection equipment, mixer, Q3110 coating drum of shot blasting machine, Q378D suspension type shot blasting machine, crawler shot blasting machine, grinding machine, manual sandblasting machine, welding transformer (BX3-510), dc arc welding machine, 0.5 T intermediate frequency induction electric furnace, box-type resistance furnace, burning kiln, hydraulic press, on testing machine, air compressor;



Water glass casting refers to the process in which water glass is added into the molding materials in proportion (usually silica sand) and then gets stirred and mixed for 6-8 min, and then grind into “sodium silicate-bonded sand”. Then the sand is put into the mould boxes in which CO2 has been much blown into. CO2 starts the chemical reaction with the water glass to form the silica gel which hardens the sodium silicate-bonded sand. Then the whole casting process is complete after drawing,mood assembling and pouring procedures.

Water glass casting is widely applied throughout all kinds of departments of the national economy such as automobile castings, engineering machinery castings, agricultural machinery castings, motor castings, elevator castings, fire control, metal castings and ship castings. As for the agricultural machinery castings, there are a lot of machines and accessories made through the water glass casting like the principal axis of draught fans and parts of the tractors.


Parameters of Water Glass Casting

Applicable Material                                               
cast steel,cast iron,stainless steel,nodular cast iron,high chromium iron,high manganese steel,alloy steel
Material Standard
CT 5~7
Surface Roughness
Ra 6.3
Annual Output
Auto, motorcycle,valve, marine, machine tools, hardware,railway, gear,impeller, pump, reducer, motor, mining machinery, engineering machinery, transmission machinery, forestry machinery, communal facility, etc.
Drawings software
Pro/E, Auto CAD, Solidwork, CAXA UG, CAD/CAM/CAE.
Turning, milling, drilling, grinding, threading ,NC, etc.
Sand blasting, polishing, plating, acid treatment, anodizing, painting, etc.
Product show:

  • Q Are you a manufacturer or a trader?

    We have our own foundry ,forging factory and machinery shop located in Liaoning Province, China.
  • Q What can you do for customer?

    One Stop Service
    1).Manufacturing and supply various machinery parts.
    2). Technical analysis and design 
    3).Factory audit, on-site production supervision, in-time feedback, pre-shipment quality inspection
  • Q How could you commit the product quality?

    1) all our factories were ISO certified. 
    2) more than 50% of New Densen’s products were sold to worldwide top 500 companies 
    which located in North American, Western Europe, and Japan.
    3) New Densen’s QC engineers will do on-site supervision and before EX-work quality inspection. New Densen will issue inspection reports for customers’ approval before EX-work. New Densen will be responsible for its reports and every parts no matter how long sold to customers.
  • Q How long shall we get the quotation?

    Processing time for inquiry: 1-3 working days.
  • Q What's the process of developing a new steel casting product?

    The procedure for new project develop as below:
    1. Technical department analyze the drawings all details 
    2.Pattern design and manufacture
    3.Casting Process
    4.Quality Control inspect the casting parts
    5.Issue inspection report for customer to check quality
    6. After inspection report approved, Logistics Department help arrange the shipping to customer