Sunmise manufacturing is good at Investment Casting, including water glass casting, Silica Sol Casting and Sanding casting and so on. We offers numerous advantages, including: freedom of design, near net shapes, good accuracy, total production flexibility, suitable for most pourable metals and alloys. The demand of investment casting parts has remarkably increased, especially from overseas buyers. Similar to sand casting, high intense labor is required; this makes us especially suited for cost conscious customers, in spite of freight cost and custom duty incurred, they still benefit much from offshore procurement. The aforementioned inherent advantages of investment casting, coupled with our company’s versatility, allow us to fulfil a wide range of requests from our customers. Our customers are able to entrust large or small projects with us in the confidence that we will meet their demands promptly, efficiently and economically.
Suitable material:
Ductile Iron (SG Iron/Spheroidal Graphite Iron), Grey Iron, Cast Steel, Aluminum, Brass
Surface treatment:
Zinc plating, hot-dip galvanizing, Cr /Ni plating, , painting,anodizing, powder coating, brushing, Polishing and so on
Packing: Carton, plastic pallet, Wooden case and so on according to custom’s requirements
Advantages:
Can produce very large parts
Can form complex shapes
Many material options
Low tooling and equipment cost
Scrap can be recycled
Short lead time possible
The process of the Investment casting/Lost Wax Casting will be below:
Wax Making
Wax replicas of the desired castings are produced by injection moulding using a metal die. These replicas are called “patterns”.
Wax Assembly
These patterns are attached via a “gate” to a central wax stick, referred to as a “tree” or “sprue”, to form a casting cluster or assembly, and mounted on a pouring cup.
Investing
A shell is built by immersing the assembly in a liquid ceramic slurry and then into a bed of extremely fine sand. Several layers may be applied in this manner.
Dewaxing
Once the ceramic is dry, the wax is melted out in an autoclave, creating a negative impression of the assembly within the shell. The shell mould is then fired in a high temperature oven.
Casting
The shell is filled with molten metal using various techniques and, as the metal cools, the parts, gates, tree and pouring cup become a solid casting.
Knock out
When the metal has cooled and solidified, the ceramic shell is broken off by vibration or water blasting.
Cut off
The parts are cut away from the central tree using a high speed friction saw.
Finishing
Minor finishing operations, such as fettling and grinding, are undertaken to produce a metal casting identical to the original wax pattern.
If you have inquires, pls contact with us with Info@sunmise.com
