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As automotive interior design becomes increasingly sophisticated, manufacturers face mounting pressure to deliver flawless decorative parts with zero visual defects. A new speaker grill mould solution developed by JinYi Mold specifically addresses these challenges through a dual-cavity symmetrical architecture, achieving left-right part consistency and mirror-finish surfaces under thin-wall conditions. The speaker grill mould is engineered for European automotive interior projects, operating at wall thicknesses between 1.8 mm and 2.2 mm. By integrating a dual-point needle valve hot runner system and Moldflow-optimised venting, this speaker grill mould eliminates visible weld lines and flow marks. Consequently, the speaker grill mould delivers a surface roughness of Ra ≤ 0.02 μm on high-polish mirror surfaces or accurately reproduces VDI 3400 standard textures. Furthermore, the speaker grill mould features compact conformal cooling channels that limit mould temperature fluctuations to ±3°C, reducing cycle time by approximately 15%. With a design life exceeding one million cycles, this speaker grill mould is validated through multi-stage mould trials (T0 to T2) using customer-specified materials such as ABS and PC/ABS, ensuring colour difference ΔE ≤ 0.5 and dimensional tolerances within ±0.05 mm.