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Lurehead03

Cnc plastic mold air relief

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AS LITTLE AS POSSIBLE!!!  you might wanna try like .0025 on one half the mold  and go deeper from there.  I've made a bunch of molds with deeper vents in the ribbed areas and regret it as I get a ton of flash....

 

The one thing I've noticed is with resin/plastic molds is the plastisol doesn't drop temp anywhere near as fast as in an aluminum mold... so your vents tend to let plastic travel into them easier - so make the vents as small as possible.  Also your shooting temps play a role - shooting cooler minimizes flash as well.

   J.

 

Edited by SlowFISH
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4 hours ago, MonteSS said:

Dont know but your gates look way to small. Looks good tho

 

I'd agree.... if you want them that small - might want to make the space between the sprue and head of lure closer... that will help avoid the gate from closing off too quick.  Also - might want to leave a little more meat between the bodies of the lure - on my resin molds when things get too close - they take forever to cool off and have a tendency to warp the mold as they get heat soaked.  Plus if you find you need to add small vents to each of those ribs to minimize any trapped air - you'll have the room.

  J.

 

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If you are going to vent it that much then try .001 on every vent from the bait and .002-3 on all other vents. Move the head of the bait closer to the sprue and run a ball mill into it not a channel. This will make a good tear point and leave you clean heads. As long as this is an aluminum mold. 

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