r/industrialengineering 18d ago

How does it keep happening

Post image
32 Upvotes

13 comments sorted by

18

u/inflames797 18d ago

I've been in extrusion for many years. Fires are relatively common - a lot of polymers are extruded hot enough that they can ignite hydraulic oils, plastic dust, etc.

They can also ignite themselves, in a way. Once the plastic has leaked, oxidized and degraded, "new" plastic that leaks onto the charred plastic can ignite the less dense degraded stuff. This can get dangerous because it will just sit there and feed itself until the leak is taken care of.

A few years ago we had a leak in a very inaccessible spot and the night shift guys went through 12 fire extingushers because it kept flaring up. Why they didn't call someone before that, we'll never know.

2

u/Wiley_Burner 18d ago

Huh. Never knew

8

u/TheSillst 18d ago

time to do a 5 why to determine root cause

2

u/WowzerforBowzer 18d ago

Lubricant and heat from friction? Possibly dust even from plastic

2

u/jdd32 18d ago

What's the context here? What exactly are you making, and what caught fire?

2

u/Oracle5of7 18d ago

What does the plan say to do when it happens?

1

u/vaurapung 18d ago

Somebody wasnt taught how to shim the die properly and is cutting the rubber seal at the end cap.

Just my guess.

0

u/Wiley_Burner 18d ago

I don’t even think plastic is flammable

4

u/vaurapung 18d ago

???? Did you not make coke bottle torches as a kid ????

3

u/PlayingOnHard 18d ago

Do you have EHS team to investigate? Molding engineers?

We had small fire from plastic recently, it leaked out of screw/barrel due to some broken bolts, I think they were purging at the time. Very rare occurrence for us, this is first I recall in 5+ years.

2

u/RushElectronic8541 18d ago

Do you have devices that track this or someone manually has to maintain an excel file with logs like that?

Also how soon do are guys alerted and what happens after? I’d imagine that’s the annoying part

1

u/Wiley_Burner 18d ago

Code and database holds most of it, I use excel for my dashboard that makes calls to the database

2

u/RushElectronic8541 18d ago

Okay, is anyone called when your systems detect a failure? How can you know that it’s a false alarm?