Sheet-met′al die.
A former, one of a pair, between which sheet-metal is struck.
The machine (
Fig. 4966) is especially designed for cutting out
[
2145]
flaring work, such as the sides of pans, pails, and basins.
The dies
L N are adjustable to suit the size of the work.
The knives are made in sections, so as to be readily detached for sharpening.
The upper die
L is fixed to the rod
E, passing through the curved guide
D, and brought down by the lever
G, operated through the pitman
I and treadle
J; a spring
K throws the die up again after each depression.
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Tinner's sheet-metal forming-machine. |
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Die and plunger. |
In
Fig. 4967, the upper inner edge of the hollow die
A has flutings or serrations whereby the tin or other metal to be struck up is crimped evenly to prevent the uneven lapping and consequent breaking of the metal.
A plunger
D, within the upper die
C, operated by a spiral spring, serves to free that die from the lower one after a stroke is made.
