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Tolerance in design can keep costs down in plastic injection molding

16/2/2018

1 Comment

 
Depending on the end use of the product, tight tolerances may not be required.
​Many consumer-type products do not require anything more than standard tolerance control because the severity of failure is low.
Many designers automatically set a tolerance in the CAD drafting software and all dimensions are toleranced to that number, when in reality the product may not need such a tight tolerance.
Designers need to understand that tighter tolerances may equate to increased production costs and development costs—therefore tolerances should be as generous as possible in the design phase to keep costs down, unless they are required for proper fit or function of the part/assembly. Achieving tight tolerance may be a more expensive process, so if it not required, loosen up the tolerance a bit to reduce production costs.
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1 Comment
Mia Evans link
20/10/2022 12:33:05

It's interesting to know that the designs would usually be done in CAD software with dimensions being toleranced to a number. I guess working in plastics injection molding companies would require a person to have an understanding of CAD software. In that case, the outcome of their job would be accurate and without errors.

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    Working in plastic injection mold making and molding over 20 years. 
    International sales and marketing director.  Technical Engineering Director for new OEM project developments.

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