What causes flames when part is ejected from Die Cast? 5

[K Magda]

I have a large die casting being made. A video shows that when the part is released from the mold, flames shoot out. What would cause this?

 

[drawoh]

K Magda,

A visible flame is nothing more than air or some other gas, heated red hot.

--
JHG

 

[EdStainless]

Mostly the residual lubricant flashing off. It didn't burn during injection because there is no oxygen inside the mold.

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P.E. Metallurgy, Plymouth Tube

 

[Compositepro]

Gases do not behave as black bodies, as solids do, where they glow red hot. They emit light only at specific frequencies, which is called their spectrum. Yellow flames are caused by glowing soot particles (solid carbon). Hydrogen flames are not visible.

As Ed said, mold lubricant (oil) gets vaporized by the high temperature. When the high temperature vapor contacts air it condenses to small droplets that appear to be smoke. This smoke is very flammable.

 

[Artisi]

For a minute there I thought you said fart

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[chicopee]

From the material safety data sheet of the lubricant, check out the auto ignition temperature to determine if it is consistent with the die temperature when the part is released.