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injection moldiing

Old 03-06-2006, 12:25 AM
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Default injection moldiing

i was wondering if the little nubs all over the wings and fusselage are just for the injection molding or do they help with lift my brother thinks they might be important but if theyre not i would like to lightly sand them off
Old 03-06-2006, 12:59 AM
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Default RE: injection moldiing

oh yeah im talking about the aero ace guess i shoulda mentioned that
Old 03-07-2006, 07:34 AM
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Default RE: injection moldiing

Good question.. i wondered the same.
Anyone know????
Old 05-02-2006, 04:46 PM
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Default RE: injection moldiing

I happen to be an injection mold process technician. Do you have any good pictures that show these bumps?
Old 05-02-2006, 04:48 PM
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Default RE: injection moldiing

its from the molding process. some have removed theirs, others havent, i cant see them affecting the plane much either way.

nick
Old 05-03-2006, 12:37 PM
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Default RE: injection moldiing

There are several places on and part that's been injection molded that have bumps, grooves, etc. Some of them come from the parting line that separates the mold halves. Others are from the ejector pins. These sre usually the circles you see on the part. They are made when the ejector pin pushes the part out of the mold when it's still warm. Another area where you will find bumps is the hole where they push the platic through. This is usually cut off at the factory. Depending on the oart, there may even be areas where gasses are pushed through an exhaust.

Used to be a moldmaker.

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