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Posts Tagged ‘back’

Question by Robert R: For plastic injection molding what are the 3 significant factors from back pressure??
3 distinguished factors that back pressure might lead to for injection molding. I would like an explanation for each.

Best answer:

Answer by Edesigner
First there is STRIATION-this is thickness incompatibility…,,, then there is HONEYCOMB- this is the hole you see in the plastic where there is not suppose to be a hole… and there is also COMPACTION –this is when the air is pressurized out of the plastic making it a too brittle …All of these can be controlled by temperature modification and of course pressure..there is also another problem which factor into injection molding this is draft point- the place where the little piece of excess runs out and in the actual process if bead are used contamination will really blow out the dies …after all that’s what we need to save the most are the dies……Well there ya go …Good luck with the plastic billet business..From the E…

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