Detailed Introduction

This automotive power distribution plastic series adopts two core high-temperature engineering plastics to meet heavy-load vehicle circuit shunting demands.

LCP material delivers ultra-low thermal expansion and excellent thin-wall forming performance, used for the yellow hollow multi-grid junction inner core with dense tiny pin slots, effectively avoiding terminal displacement caused by continuous engine cabin heat radiation. V0 flame-retardant glass-filled PBT possesses superior mechanical rigidity, impact resistance and flame suppression capacity, suitable for black closed fuse boxes, dense multi-pin connector shells and thick-wall mounting brackets that bear fuse heating and assembly mechanical stress.

The product range covers three structural categories: closed integrated fuse relay distribution housings, fully enclosed dense multi-pin signal/power connector shells, and open hollow grid circuit separation inner frames. Each component adopts partition grid ribs to isolate independent circuits, together with fool-proof terminal positioning slots to prevent misassembly. Thickened reinforcing rib design greatly improves structural stability and eliminates deformation under alternating cold and hot cycles. Optimized melt flow mold structure solves filling shortage and warpage defects of large thin-grid plastic parts during high-temperature injection molding.

Complete Production Workflow

1. Custom precision mold core processing: 5-axis CNC rough & finish milling, micro sinker EDM for tiny dense pin holes and complex grid rib contours
2. Vacuum stress relief heat treatment for mold steel to stabilize large cavity dimensions under long continuous high-temperature injection cycles
3. Multi-stage mirror polishing to reduce melt adhesion of LCP/PBT flame-retardant plastic and guarantee smooth terminal insertion matching
4. Segmented temperature-controlled precision injection molding for large thin-grid plastic components
5. Post-molding full 3D coordinate dimensional inspection, burr trimming, high-temperature thermal aging and flame retardancy safety testing

All finished junction plastic parts pass thermal stability and vibration anti-loosening aging verification. Custom development is available based on customer circuit layout drawings: grid quantity, pin density, wall thickness, plastic flame retardant grade and mounting structure can be adjusted according to circuit load, operating temperature and vehicle assembly specifications. The series serves passenger car body control fuse boxes and new energy vehicle auxiliary circuit junction modules.

Specification Table