We understand that with plastic injection molded parts, weight is the best method of controlling the process capability. Is there a guideline or standard for defining the tolerance?The most common method is: Shot to shot weight variation calculated as (three standard deviations) divided by (average weight) must be less than 1% and should be less than 0,5%. In general it is possible to achieve 0,1-...

Plastic injection part designers often use design for manufacturing and assembly(DFMA) guidelines to reduce the number of parts in an assembly. For this reason,plastic injection molding part designs can be extremely complex with many features and tight tolerances.The delivery of plastic moldings that satisfy the dimensional requirements is a joint responsibility of the mold designer,molder,materia...