Appliances · OEM tier 1
Re-gated impeller tool holds ±0.10 mm balance straight off the press — the customer's hand-weighting station was deleted.
Imported impellers arrived out of balance often enough that the OEM was weighting them by hand on the line.
Re-gated the tool to a centre hot drop, tuned pack pressure per blade, and locked the resin to a single PP-GF20 batch supplier.
Balance held straight off the tool. The hand-weighting station was deleted from the customer's line.
Thirteen blades, each one filling at a slightly different rate from an edge gate. Mass distribution wandered by shot, and the imbalance showed up as noise at 2,400 rpm.
A centre hot drop makes the flow front radially symmetric — every blade sees the same pressure history. Pack profile was then tuned per blade set on a moulding trial matrix.
Every lot ships with a balance and dimensional report. The OEM audits the report, not the parts — and repurposed the weighting bench for final packing.
Every line was measured on the same programme, before and after the change.
| Before | After | Δ | |
|---|---|---|---|
| Balance tolerance | ±0.35 mm | ±0.10 mm | −71% |
| First-pass yield | 91.2% | 99.4% | +8.2 pts |
| Hand rework | 1 station | None | −100% |
| Cycle time | 27 s | 22 s | −19% |
| Annual volume | 140 k | 240 k | +71% |
| Noise complaints | Recurring | Zero in 18 mo | −100% |
“We budgeted for a weighting cell for the next three years. We deleted the line item instead.”
Send a drawing or a sample. You get a DFM read, a tool plan and a cycle estimate — not a brochure.
