Question

In: Mechanical Engineering

I am trying to understand a few injection molding calculations. I will appreciate your assistance. How...

I am trying to understand a few injection molding calculations. I will appreciate your assistance.

How do I calculate part weight for plastic injection molding?

Is it mass * density or volume * density?

My part is 29.126 grams and I am using  Polypropylene (PP) which has a density of 0.899 g/cm3 .

Therefore : 29.126 * 0.899= 26.184 grams

To convert to ounce: 26.184* 1/28.3495=0.9236 ounce

Is the above correct?

How do I calculate shot weight?  Please explain clearly and give and example.

How do I calculate core and cavity cost?

I will appreciate a clear and will written explanation because I want to understand how its done.

Thank you

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samet mamat answered 8 months ago
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