FAT Checks for a Servo-Hydraulic Injection Molding Machine
Buyers should agree pass or fail criteria for clamping, screw, and servo-hydraulic drive behavior before the factory acceptance test, using catalog values only as reference points.
Before signing off a servo-hydraulic injection molding machine, decide which measurements will be recorded as pass or fail at the factory acceptance test, and who witnesses each one. A practical starting point is to require the supplier to state the tested clamping force and screw diameter for the offered model, since the series ranges of 600–33,000 kN and 24–220 mm are reference values only and do not describe a supplied unit.
Ask how clamping force will be verified and at what setpoints, and whether the result is read from the control display or an independent instrument. For the screw, agree the diameter fitted and a repeatable check of injection consistency across consecutive cycles. For the servo-hydraulic drive, define what counts as acceptable response during start, stop, and hold, and whether pressure or position traces must be recorded. Include a short run in the intended plastic and confirm cycle data are logged against agreed limits.
Before requesting a quote, confirm with the supplier which tests are standard, which are optional, what instrumentation and records are provided, and how a failed check is corrected and retested.