
DFM HVACプラスチック部品設計 製造用射出成形ガイド
Key Takeaways DFM applied before tooling can reduce HVAC part cost by 20–35% and cut mold rework cycles by half. External HVAC housing surfaces require 1–2° draft; internal ribs and snap-fit walls need 2–3°; textured surfaces add 1° per 0.025 mm texture depth. Wall thickness tolerances: ABS 1.2–3.5 mm, PP 0.8–3.8 mm, PA-GF 1.5–3.0 mm — deviating by more than 25% causes warp or sink. Gate location must avoid visible A-surfaces and high-stress snap zones; fan gates spread pressure across thin-wall HVAC panels. Rib thickness should be 60% of adjacent wall thickness; boss outer diameter should be 2× the boss core diameter with height under 2× outer diameter. What Is […]
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