How do they copy a part and not allow for shrinkage? We used a shrinkage ruler when making the patterns so that after the part was cast and cooled it would be the right size.
What's the good of that unless he's doing it for a hobby,the material would not last ten revaluations in a machine application and all the ware of the pattern is transfered to the new part
since the purpose of these videos is to educate on the process of casting, they should mention this important aspect. Since they don't, i will try to the volume of the solid metal is smaller than the liquid's. so, when the metal solidifies, a contraction is observed. in a casting process, the metal solidifies from the outside (first a layer is formed on the boundaries with the mould, then the solidification proceeds inwards). therefore there will always be a space that will be empty inside the cast, as the solidification ends. it can either be a hole or many tiny pores. The mould must be carefully designed (taking into account particularities of the piece you want to produce) to prevent that, which is not the case in any of these videos i've been seeing on youtube lately. so, if you buy a replacement part for your car that has been produced like this, be ready to have to replace it in few weeks, because it's going to deform (or even break) i didn't even mention the work conditions of the laborer. that piece of metal he produces is not nearly as flawed as his health will be in a few months.
@@FairladyS130 "Pro tip" my ass. Easy to say to someone to be quite behind your dirty keyboard. You silly pr*** Aluminium made internal bits from a gearbox... "All right" ... leave it to the "pros" in making sand castles. 😁
