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Draft esign company

I'm just gonna show you exactly what draft angles that are why we need them what happens if you don't put them on there how much you need deaf dancer so right now you're looking at the Lego block and this is not drafted if you want to see it in an exaggerated draft form that's what it'll look like this is got six degrees of job to apply the outside and the inside walls so what is the purpose of draft angles it's just so that a park and the objective from mold easily so this is what the mold might look like the insert blocks and the mold anyway thank you if you're designing something to be injection molded you need draft angles this is relevant to you so what actually happens what does it look like when it ejects from the mold so this is where the plastic comes in and it fills up the mold and it cools down it opens the injection things push out the part so I'll show you that in motion quick refrain okay so there's two things happening here so you're looking at it and it's undrafted for and what's happening is when this mold opens these walls are scratching each other because it's gotten a no draft angle they scratched but there's a second thing happening and that's the vacuum effects so in this internal area where this just the air space there's no area for their air to escape so as the mall opens there's like a suction force happening on these outs of walls and the power and it's how you walk would happen to the park if it was undrafted to all scratched like we saw and the vacuum sucked too much on the path scratch marks to put something like this [Music] the vacu force and ejection force from the ejector pins my end either the pins will push to thee into the park this is too much force required to push him off so that's kind of just like a local defamation from ejection pins but the case where the whole part deforms because of the ejection force it might look something a little bit like what do that see in second a pretty mind see so what would if we if we replay that mold opening but in its drafted form what might that look like so we just look at it in our simple mold here just this start to open the mold like what we saw before and so what can you notice here there's a gap it's just how it happens when you pull a pyramid shape off another pyramid shape the walls they don't scrape just as it opens which relieves the friction and that suction for start which is talking about earlier no longer applies because the air can escape now these gaps that are naturally created as a tape of mold a drafted part is d molded so...