Casting Fundamentals
This manufacturing process involves pouring molten metal into a mould cavity and allowing it to solidify into the desired shape.
What is casting?
This casting defect appears as small cavities or holes caused by trapped gases during solidification.
What are blowholes?
This casting process uses disposable sand moulds and is widely employed for producing large components such as machine beds and pump housings.
What is sand casting?
This component creates the mould cavity by providing the shape of the final product before molten metal is poured.
What is a pattern?
Two streams of molten metal meet inside the mould but fail to fuse properly, creating a visible line or weak joint.W
What is a cold shut?
This casting process uses a wax pattern and is preferred when high dimensional accuracy and excellent surface finish are required.
What is investment casting?
This moulding material is commonly made of silica and is widely used because it is inexpensive, reusable, and can withstand high temperatures.
What is moulding sand (or green sand)?
This defect results from insufficient feeding of molten metal during solidification, producing cavities in the casting.
What is shrinkage cavity (or shrinkage defect)?
A manufacturer needs to produce thousands of identical aluminum components with good surface finish and dimensional accuracy. This casting process would be a suitable choice.
What is die casting?
A casting requires a hollow passage through its center. This mould component is placed inside the mould cavity to create that internal feature.
What is a core?
A foundry repeatedly observes gas-related defects in castings. Improving mould permeability and reducing moisture content would help eliminate this defect.
What are blowholes?
An aerospace company must manufacture turbine blades with intricate shapes and tight tolerances. Engineers select this process because it can accurately reproduce complex geometries.
What is investment casting?
Engineers add this reservoir to a mould so that additional molten metal can flow into the casting during solidification and compensate for shrinkage.
What is a riser (or feeder)?
A casting has an incomplete section at its far end. Investigation shows the pouring temperature was too low and the metal lost fluidity before reaching all parts of the mould. Identify the defect.
What is a misrun?
A factory needs large, heavy castings in small production quantities at the lowest tooling cost. After comparing alternatives, engineers would most likely choose this process.What is sand
What is sand casting?