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1-Visitor
July 11, 2011
Question

Injection Mould Models

  • July 11, 2011
  • 11 replies
  • 3650 views

Guru's, A bit off total really after advice / standards really. We are currently looking into gonig over to injection moulded parts for some items on our products. How ever the question I am really wanting an answer too is regarding model set up and what are the thought on drawings?


Our current thoughts are either a full dimensioned drawings& models, or aminamal drawing and model.


also what are the views on holes sizes etc on models, ie how do you show tolerances etc, are holes modeled top end, lower end of tolerance or the mean?


Might be simple questions but not had a great deal of experiance of using models to manufacture moulded parts



cheers


Colin Down


Design Engineer


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11 replies

1-Visitor
July 12, 2011

I did not mean to say that 0.3 is the number to use for all parts of all sizes, I should have said "+/-x.x (actual number to suit process and material)".

These days I refer to SPI's tolerance guide data rather than ISO's.

JD