Today's KNOWLEDGE Share
💡 Understanding Draft Angles in Injection Molding — Small Detail, Big Impact
When designing plastic parts, draft angles are one of the most overlooked features — but they can make or break your moldability and part quality.
🔍 What is a Draft Angle?
A draft angle is the slight taper applied to vertical walls of a molded part to allow it to eject smoothly from the mold.
Why it matters:
🛠️ Prevents part damage during ejection
📏 Improves dimensional consistency
💸 Reduces wear on the mold = lower long-term costs
🚫 Avoids surface scratches or sticking
🧠 Design Tip:
For most thermoplastics, use a minimum 1°–2° draft per side
High-friction materials (like PC or PMMA)? Go up to 3°–5°
The deeper the cavity, the more draft you need
Polished surfaces require greater draft than textured ones
SCSplastic, we don’t just manufacture — we help optimize your design before tooling starts.
Because smart design = better parts = fewer surprises.
📐 Draft once. Mold forever.
source : SCSplastic
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