INJECTION

INJECTION MOLDING

ENGEL Molding Machines

ENGEL Molding Machines

Haitian Molding Machines

Haitian Molding Machines

Secondary service

Secondary service

Factory Control
Points

01

Mold Management:

  • Mold database / Preventive maintenance plan / Lifespan monitoring / Repair records

Equipment Management

  • Injection machine inspection / Auxiliary equipment maintenance (dryer / mold temp controller / robot) / Calibration schedule

Material Management

  • Incoming inspection / Drying specifications / Masterbatch ratio / Regrind control / Moisture-proof storage

Environment Management

  • Workshop temp & humidity control / Cleanliness management / 5S workplace

Molding Engineer —
Skillset

02

Process Technology

  • Parameter setting (temp / pressure / speed / time etc.) / Material properties (shrinkage / flowability / drying etc.)

Mold Knowledge

  • Understand mold structure (gate / cooling / venting / ejection etc.) / Diagnose mold issues from defects

Defect Analysis

  • Identify sink marks / flash / warpage / weld lines / Root cause analysis / Develop corrective actions

Trial Capability

  • Scientific molding (DOE) / Process validation / Stability testing

Quality Tools

  • CPK / FAI / 8D report

Automation & Digital

  • Robot programming / Parameter traceability

Production Process
Control

03

Before Production

  • Mold installation confirmation / Material drying verification / Equipment pre-check / Parameter verification / First article inspection (FAI)

During Production

  • Real-time parameter monitoring / Timely sampling (dimension / appearance / weight) / Rapid abnormality response / Defective segregation

After Production

  • Last piece inspection / Mold maintenance (rust prevention / cleaning) / Production data recording / Quality traceability filing

Material Selection &
Recommendation

04

Common Materials

  • ABS / PC / PP / POM / PA / PMMA / Glass-filled etc.

Selection Criteria

  • Mechanical properties (strength / toughness / rigidity) / Thermal properties (heat resistance / HDT) / Environmental adaptability (weathering / chemical / UV) / Appearance requirements / Cost budget / Process compatibility

Recommendation Process

  • Understand product application → Analyze functional requirements → Shortlist candidate materials → Compare pros & cons → Provide recommendation (primary + alternative) → Predict molding risks → Suggest modification if needed

Common Issues to Avoid

  • Material moisture causing defects / Glass fiber exposure affecting surface / Shrinkage variation causing dimensional deviation / Material degradation leading to brittleness / Cross-material contamination