Casting, Joining and Surface Finishing
Three ways to shape and finish engineered products: casting molten metal in a mould, joining parts permanently or temporarily, and finishing surfaces to protect them from corrosion.
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Casting, joining and finishing 🔧
Engineering turns raw materials into finished products. This module covers three groups of process: casting, where molten metal is shaped in a mould; joining, where parts are fixed together permanently or temporarily; and surface finishing, which protects a product and improves its appearance.
Words for the processes 🔑
Learn these four terms before you compare the processes.
Permanent and temporary 🆚
Parts can be joined in two broad ways.
Grade 9 thinking 💡
To reach the top grades, justify the process you choose for a job, thinking about cost, strength, corrosion and whether the product must be taken apart, rather than just naming it.
Match the process to what it does 🔗
- casting
- welding
- galvanising
- riveting
- pouring molten metal into a mould to form a shape
- joining metal parts by melting them together
- coating steel with zinc to stop rust
- joining parts with metal pins that are hammered
Match the term to its meaning 🧩
- permanent join
- temporary join
- corrosion
- mould
- a join that cannot be undone without damage
- a join that can be taken apart
- the wearing away of metal, such as rust
- a hollow shape that gives cast metal its form
What is casting? ❓
What is casting?
- Pouring molten metal into a mould to make a shape.
- Cutting metal with a saw.
- Bending metal into a curve.
Permanent joins ✅
Select the TWO permanent joining methods.
- Welding.
- Riveting.
- Using nuts and bolts.
- Using screws.
Order the casting 🪜
An interactive activity.
Summarise the processes 📝
In _____, molten metal is poured into a mould to make a shape. Parts can be joined with a permanent join, such as _____, or a temporary join, such as nuts and _____. Surface finishing, such as _____, protects metal from _____.
Count the processes 🔢
An interactive activity.
Spot the two permanent joins 🖍️
An interactive activity.
Casting, joining or finishing? 🧭
An interactive activity.
Choose a join ✍️
An interactive activity.