Why Investment Casting?


 The investment casting process or lost wax process, can produce the most intricate shapes in just about any alloy. In order to produce & machine these parts, you need to have in depth knowledge of the alloys and much experience. There is no other metal working process that provides the design freedom to easily cast complex intricate shapes and assemblies as the investment casting process. The lost wax method out performs any other casting process when it comes to superior surface finishes especially when compared to sand casted, forged or welded fabrications. Some specific benefits are:
  • Reliability
    The investment casting process provides reliable process controls and repeatability that are maintained from casting to casting.
  • Tolerances 
    WaysCan routinely holds to tolerances of ± .005”. This is not always possible with other types of casting processes.
  • Amortization Lowers Tooling Cost
    The initial wax injection mold to produce the patterns, averaged over the entire production quantity, is often lower than other casting tooling costs. Quality tooling produces a quality part and will be more cost efficient in the long run.
  • Better for the Environment
    An investment casting is produced from 9 wax patterns which in most cases can be reclaimed and used again. The wax pattern is a great way to see your part before it is cast, thus eliminating expensive revisions and reducing metal scrap. More importantly, the investment casting process produces parts to net or near net shapes which significantly reduces or eliminates the amount of secondary machining. Most scrap from secondary services like machining can be reused as well.
  • Design & Casting Versatility
    WaysCan works with over 100 different ferrous and non-ferrous casting alloys. This allows our investment casting process to be used in a variety of industries as it produces a wide range of cast and casting based assemblies. Lost wax castings provide the maximum design flexibility for manufacturing complex, multi part products in many cases.
  • Intricate Design
    When using investment castings, design engineers can easily incorporate features such as logos, product ID’s/numbers, and letters into their component. Thru holes, slots, blind holes, external and internal splines, gears, and thread profiles can often be cast to reduce secondary machining time and total part cost.

Wayscan Metal Products holds two ways of investment casting: Water-Glass Investment Casting and Silica Sol Investment Casting.


Water glass casting (sodium silicate casting) is a technology of Russian origin. Currently it is common used in China.  This technology is mostly used for Steel and Alloy steel components. By using this technique, cost can be saved when produce big size parts compared to the silica sol castings(more than 50% lower), but less precise in dimensions (CT7-CT9) and a bit worse surface looking (Ra12.5-RA25).

Water glass (sodium silicate) is used to cure the ceramic layers. This substance is added to the slurry (see the next page). The wax tree is then immersed (in the slurry). The slurry continues to adhere to the wax, after which it is strewed with ceramics. It is then placed in a bath with a water chloride solution. The water glass (adhering to the wax with the slurry) 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.
Water glass cast components are mainly used where heavier/stronger and yet more complex shapes are required. Applications of this technique are widely presented in production of Trailers, Agricultural Machineries, Mining Machine, Valve Bodies and in offshore industry.
– Reduction of the cost price, since expensive processing and welding operations are eliminated;
– Cheap moulding process;
– Complex design without draft angles;
– Flexible in production numbers;
– Higher accuracy in comparison to sand casting.

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