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Hot extrusion is a hot working process, which means it is done above the material's recrystallization temperature to keep the material from work hardening and to make it easier to push the material through the die. Most hot extrusions are done on horizontal hydraulic presses that range from 230 to 11,000 metric tons (250 to 12,130 short tons ...
During an extrusion process it is essential to consider the surface finish of exposed product surfaces. As a general rule, the narrower an exposed surface, the more uniform its finish becomes. Webs, flanges and abrupt changes in metal thickness may show up as marks on the opposite surface of an extrusion, particularly on thin sections. The ...
In steel extrusions, the depth of an indentation should be no greater than its width at its narrowest point. This is necessary to provide sufficient strength in the tongue portion of the extruding die. In copper alloys, magnesium, and aluminum, the depth of an indentation may be greater since extrusion pressures are lower.
This process is the same as a regular extrusion process up until the die. There are three main types of dies used in this process: annular (or crosshead), spider, and spiral. Annular dies are the simplest, and rely on the polymer melt channeling around the entire cross section of the die before exiting the die; this can result in uneven flow.
Let’s get physical! Jamie Lee Curtis teamed up with Jimmy Fallon to recreate her legendary Perfect aerobics scene on The Tonight Show on Wednesday, nearly 40 years after the Oscar-winning ...
The superforming process varies mostly in the way that the metal is introduced to the form; the main 4 variations are: Cavity forming The metal in its plastic state is introduced to a negative form by gas pressure. It is good for large and complex parts such as automotive body panels and is excellent for shaping 5083 aluminium alloy.
A photo shared by Vice President Kamala Harris from Jimmy Carter's funeral is gaining attention for the exclusion of a certain former and incoming president. Trump and incoming first lady Melania ...
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