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The high precision injection mold for automotive interior plastic parts is engineered for manufacturing components requiring tight dimensional control including trim bezels, switch panels, display bezels, and sensor housings. This tooling system achieves sub-millimeter accuracy through precision-ground cavity blocks, advanced hot runner temperature control, and high-stability ejector mechanisms. The mold architecture incorporates guided ejection systems, precision-aligned slide mechanisms, and wear-resistant coatings to maintain tolerance consistency across extended production runs. Steel selection includes Stavax ESR for mirror-polished surfaces and H13 with PVD coating for wear-prone zones. Cooling employs conformal circuits with flow monitoring to ensure thermal uniformity. The design includes optical measurement reference points for in-process quality verification.
Core advantages
- Precision-ground cavity blocks achieving ±0.01 mm dimensional accuracy
- Guided ejection system with wear-resistant bushings for consistent alignment
- Hot runner with individual thermocouple control (±1°C accuracy)
- PVD coating (TiAlN, CrN) on sliding and core surfaces extends tool life
- Conformal cooling with flow sensor monitoring for thermal stability
- Interchangeable precision inserts for design variant production
- Optical reference points for CMM and vision system verification
Product characteristics
| Mold base standard | DME / HASCO / FUTABA (customizable) |
| Injection material compatibility | PC, PC/ABS, ABS, PMMA, POM, PA6/66 |
| Clamping force range | 150 – 1200 ton |
| Dimensional tolerance | ±0.005 – ±0.015 mm |
| Surface finish | SPI A1 (mirror), VDI 3400, or textured |
| Ejection system | Guided ejector pins + stripper plate + air poppets |
| Cooling medium | Water / oil with flow-monitored conformal circuits |
| Mold life (maintenance cycle) | 1M – 2M shots based on material and tolerance |
Application scenarios
- Display bezels and instrument cluster trim rings
- Switch panels and control module housings
- Sensor housings and camera mount bezels
- Infotainment screen surrounds and touch bezels
- HVAC control panels and rotary dial housings
- Ambient lighting bezels and light guide mounts
- Badge and emblem mounting frames
Processing considerations
- Mold temperature: 60–80°C for PC; 50–70°C for PC/ABS
- Injection profile: decoupled filling with 95–98% first-stage fill
- Pack pressure: 50–70% of injection pressure, hold time 3–7 sec
- Venting depth: 0.008–0.012 mm for precision optical surfaces
- Shrinkage allowance: 0.3–0.5% for PC; 0.4–0.6% for PC/ABS
- Gate design: pinpoint or edge gates with 0.5–0.8 mm thickness
- Cooling: conformal circuits with 6–8 mm diameter and flow monitoring
