Polyurethane vacuum casting
Advantages of polyurethane:
1. Low cost of moulds.
2. Moulds can be created in a few days.
3. Many casting materials are available using over moulding.
4. Copies are highly accurate with smooth surface finish.
5. Perfect for engineering models, samples, and rapid prototypes.
How it works?
Silicon Tool: We pour the liquid silicon in the mould and leave it so that it dries. Once it dries out, we take out the mould which leaves the cavity.
Casting: The resin is poured in the cavity and creates a product replica.
There are some points to be kept in mind while vacuum casting. Need to take care of the wall thickness. Same as in injection moulding, we need a consistency throughout the model for proper finish and do not design over thick components or walls so as to protect from shrinkage.
Benefits of Vacuum Casting
Reduce tooling cost: The cost of the mould used in vacuum casting is exceptionally low as compared to injection moulding where we use Aluminium or steel tools.
Lead time of tooling: Manufacturing from urethane casting is less time consuming (8-10 days) then the traditional injection moulding (4-6 weeks).
Various materials: Vacuum casting offers wide range of materials.
Quality parts: Urethane casting offers same strength and finish like injection moulding.