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The crown corks are given their typical 21-flute shape
and the sealing during the punching and lining operation.
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Punching and lining
The varnished and printed metal sheets
are shaped in the next operation. The
material is simultaneously cut and deep
drawn by punching. Now the crown
cork has got its typical shape with
21 flutes.
From the punching machine the shells
run into silos from where they are
transported via covered magnetic
belts into the lining machines. Here
the crowns are provided with their
polyethylene sealing. The material
properties used as well as the different
sealing profiles (see page 14) are
selected to meet specific customer
requirements. The 100% final
inspection is checking inside and
outside of the crown for all quality
relevant parameters.
After passing the control system,
the crowns are counted electronically
and filled into the customer specified
packaging. |
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Punching and lining process with final electronic inspection. |
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| History · Raw materials · Coating · Printing · Punching & lining · Quality management · Twist-off-crowns/Handling · Hygiene, Logistics & Packaging · Contact · Imprint |
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