Quality Control

Every machine undergoes 8 quality checkpoints — from raw material inspection to full-load trial run — before leaving our factory.

Quality Benchmarks

⚙️
Screw/Barrel Tolerance
±0.01mm precision machining
🔊
Noise Level
<75 dB at full load
📳
Vibration
<4.5 mm/s (ISO 10816)
🌡️
Temperature Stability
±2°C across all zones

8-Step Quality Control Process

01

Incoming Material Inspection

All steel, motors, bearings, electrical components, and raw materials are inspected against specifications before entering production. Substandard materials are rejected and returned to suppliers.

Steel hardness testMotor spec verificationBearing brand check
02

CNC Machining Precision Check

Critical components — screws, barrels, gearboxes, die heads — are measured with CMM (Coordinate Measuring Machine) after machining. Tolerance of ±0.01mm is enforced for all mating surfaces.

CMM dimensional checkSurface roughness Ra≤1.6Concentricity ≤0.02mm
03

Welding & Frame Inspection

All welded joints are visually inspected and key structural welds are subjected to magnetic particle testing. Frame dimensions are verified against engineering drawings.

Weld seam inspectionFrame squareness checkLoad-bearing test
04

Gearbox & Drive System Test

Gearbox is run at full speed for 2 hours before installation. Oil temperature, noise level, and vibration are monitored. Any abnormal values trigger disassembly and re-inspection.

2-hr no-load runOil temp <60°CNoise <70 dB
05

Electrical & Safety System Check

Complete wiring inspection, insulation resistance testing, and emergency stop function verification. PLC parameters are set and verified against the machine specification sheet.

Insulation resistance ≥1MΩE-stop response <0.5sPLC parameter lock
06

No-Load Trial Run

The fully assembled machine runs for 4 hours without material to verify alignment, lubrication, temperature control, and all safety interlocks. Any issues are corrected before full-load testing.

4-hr no-load runVibration measurementAll interlocks verified
07

Full-Load Trial Run with Real Material

The machine is run at rated capacity with the actual plastic material type ordered by the customer. Output pellet quality, capacity, energy consumption, and machine stability are all measured and recorded.

Rated-capacity run ≥2hrPellet quality samplingEnergy meter reading
08

Pre-Shipment Inspection & Documentation

Final appearance check, painting touch-up, and packing inspection. Full documentation package prepared: test report, operation manual, spare parts list, CE certificate, and packing list.

Customer video approvalFull doc packageExport packing standard

Quality Performance Metrics

MetricIndustry AveragePANDA StandardStatus
Machining Precision (key parts)±0.05mm±0.01mm✓ Exceeds
First-time assembly pass rate~85%>96%✓ Exceeds
Post-shipment defect rate~5%<1.5%✓ Exceeds
Warranty claim rate (12 months)~8%<3%✓ Exceeds
Customer satisfaction score~80%>93%✓ Exceeds

Want to inspect before you buy?

We welcome third-party inspections and factory audits at any stage of production.

Arrange an Inspection