Cold Extrusion
Principle of cold extrusion is similar to that
of hot extrusion, which has been discussed under hot extrusion in section. The dissimilarity is that material in hot working processes should possess
the essential ductility
with out the application of heat. Impact extrusion is also
a cold extrusion process. It is used for making small components from ductile
materials. Impact extrusion process is shown in Fig. Impact extrusion of
material is accomplished where the
work blank is placed in position over the die opening the punch forces the
blank through the die opening causing material to flow plastically around the
punch. The outside diameter of the tube is same as diameter of the die, and the
thickness is controlled by the clearance between
punch and die. Collapsible medicare
tubes and toothpastes etc. are produced using this impact extrusion.
of hot extrusion, which has been discussed under hot extrusion in section. The dissimilarity is that material in hot working processes should possess
the essential ductility
with out the application of heat. Impact extrusion is also
a cold extrusion process. It is used for making small components from ductile
materials. Impact extrusion process is shown in Fig. Impact extrusion of
material is accomplished where the
work blank is placed in position over the die opening the punch forces the
blank through the die opening causing material to flow plastically around the
punch. The outside diameter of the tube is same as diameter of the die, and the
thickness is controlled by the clearance between
punch and die. Collapsible medicare
tubes and toothpastes etc. are produced using this impact extrusion.
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| Impact extrusion |
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