Today's KNOWLEDGE Share : Why Venting Is a Critical Detail in Mold Design

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 Today's KNOWLEDGE Share

🔹 Why Venting Is a Critical Detail in Mold Design



In injection molding, venting may seem minor—but it plays a major role in part quality.


When plastic fills the mold cavity, air needs to escape. If vents are missing or poorly placed, the trapped gas causes:

❌ Burn marks

❌ Incomplete filling (short shots)

❌ Weld lines

❌ Flashing or surface defects


A good venting strategy ensures:

✅ Smooth flow without trapped air

✅ Better surface quality

✅ Lower injection pressure

✅ Longer mold life


Our engineers evaluate vent locations as part of every DFM review—long before the mold is built. It’s just one of those behind-the-scenes decisions that leads to fewer defects and more consistent results.


Design smart. Vent smarter.


source : SCSPlastic

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