PKSC 1020 Lecture 5: PGSC 1020 Lecture 5 Notes (II)

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Pr. Heather Batt
Lecture Notes Making Cans
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There are two different processes for making cans, depending on which design you need
for your product. Cans can be made out of either steel or aluminum.
Three Piece
Two Piece
1. Rectangle formed into cylinder
2. Seal side seam of cylinder
3. Two metal circles rolled onto ends
of cylinder
1. Circle drawn into cup shaped
cylinder
2. One circle needed for top
Two piece cans have a little bit more variation, and there are two common methods used
to make them. Both aluminum and steel cans can either be drawn and ironed, or drawn and
redrawn, and the two methods are determined by the products that are being put in these cans,
and what the specifications are to keeping them fresh.
Drawn and Ironed (Aluminum or Steel)
Draw and Redraw (Aluminum or Steel)
- Ironing process
allows thinner walls
- Side walls have even
thickness
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- Mechanical cinch seam using machinery to fold excess metal over itself to create a
double-layered seam that is pressed together using extreme force
- Welded Seam utilizing welding equipment to fuse the body of the can and the lid
together by heating the metal and having it melt together
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