Investment casting is referred to as a near net shape casting process and it is often preferred over other casting processes because of its many advantages(Some of them are mentioned below),
- Application to parts with intricate geometry combined with high accuracy
- Relative ease of producing components with internal cavities
- Good surface finish, and good cast-ability with a large variety of alloys
The investment casting process has number of smaller processes and has its own complexities. There are three major stages in investment casting:- The production of wax patterns,
- The production of the ceramic moulds and
- The metal casting
Dimensional changes occurs at every above mentioned stages, It needs to be addressed by applying shrinkage allowances so that the required final dimensions of the cast part can be achieved as accurately as possible.
As the demand for tighter tolerances from investment casting grows, it becomes economically and competitively important for the investment caster to be able to have the best possible control of the factors that affect the accuracy of the final cast component.
Modelling The Wax Pattern Contraction Process
Because of the change in temperature occurring in the pattern material as it cools from injection temperature to room temperature there is an associated change in volume that can be accurately predicted if the material properties are known. However, there are a large number of factors such as injection parameters, die cooling regime, part size and geometry, which affect the degree of the changes in this ideal behaviour of the material.
Above things needs to be addressed for getting accuracy in investment casting at every stages of processes apart from thes wax pattern also plays important role for achieving accuracy so we need to choose a wax pattern which have some properties for making the pattern like lowest thermal expansion, low melting point, low shrinkage, good surface finish, eco friendly etc. We at Saffroshine Pvt. Ltd. manufacture and supply all types of waxes across the world, which helps you to achieve accurate desired results in investment. Please connect with our wax expert for getting customized consulting solutions for your requirement at sales@saffroshine.com or call us at +91-217-2357272.
