Hello, I'm new to injection mold. I found this pen cap is a perfect circular shape. The curve at the parting line is perfectly smooth. If there is even a 0.5 degree draft, the curve at the parting line is already not as smooth as this. Anyone knows if there is a draft in here or sometimes drafting is not necessary? Or some grinding smooths it in a post treatment process? As I can barely see the parting line.
Thanks!2 個解答Engineering3 年前
I see these circle marks on many injection molded plastics (red arrows pointed). What causes them in the manufacturing process? Thanks!
* In addition, anyone knows the function of a cold slug in injection molding process?4 個解答Engineering3 年前