How to prevent/ manage POROSITY in PRESSURE DIE CASTING | Serious Engineering: Ep 29
Ғылым және технология
In this episode Gordon explains how to prevent or manage and work with porosity in pressure die casting projects. This is Episode 29 of Serious Engineering.
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Have you ever wished that your pressure die castings had absolutely no porosity in them? Well, sadly, porosity is just a fact of life, but today we’re going to discuss how product developers can work with their suppliers to minimise the problem. We’re also going to explain the difference between short-shots, entrained air, and vacuum bubbles.
Pressure Die Casting is a very misunderstood process. Some people may believe this is just a matter of pouring molten metal into a die, waiting for it to cool, and then removing a finished metal part. But it's more than that.
Chapters:
0:00 Skit
0:15 Introduction
0:46 Short-Shot
1:28 Entrainment of Air
3:25 Vacuum Bubbles
4:58 Recommended Aluminium Alloys
5:50 Takeaways/ Recap
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#diecasting #porosity #productdesign
Пікірлер: 8
In this episode Gordon explains how to prevent or manage and work with porosity in pressure die casting projects. Have you ever had to deal with porosity in your die casting projects? What was your experience?
Vacuum die casting is the standard for hypereutectic piston manufacture and has been for a while. Nothing "stupid" about it at all.
On the other side... There are many development on metal foam parts, which are "full with porosity"...
Good contents. Could adding feeders solve the porosity in some degree?
Can CAST IRON prevent porosity
Hello Gordon, I have fully watched your video and have to disagree to at least 70% of the content of your video. I was working at LKR till last year (video you showed from the SUSTAINair H2020 Project was shot at our plant) and your mentioned short shot was intended to occour in that case. A short shot is something you do to set up your casting process and break it down into your 3 phases for perfect machine parameters. Next up you can definitely manage the entrained air - but why not mentioning the 1. phase? This phase is crucial for the porosity in your casted part. The simulations you showed were quite bad and should not be applied to the real casting itself - you should have mentioned it to make that one clear. Also a vacuum system is definitely not "highly unpractical"... the system is just as smart as it's user :-) and last but not least your recommended alloys... the most common alloys in die-casting are A226 and Silafont-36. Yes the eutectic alloys are well known for a good casteability but they do not have an inpact on the amount of porosity in your casted part. Regarding the mole fraction to mass fraction higher porosity can occour but just if you play bad with your temperatures.
nice pc you got there.... (simulation math go brrrrrrrrrrr)
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