Precision Parts - Front Mold Round Inserts

The custom injection mold parts – front round inserts for the bottle body are used for in-mold production of high-performance semi-structural or structural products.
The customer encountered issues with mold insert positioning and fit, as well as wear and life in production.

Solutions:
1.Insert Positioning and Fit Issues
The fit clearance between the round insert and the front mold is inconsistent, resulting in flash or poor venting.
(1) Use positioning pins to prevent circumferential displacement.
(2) Add the venting grooves.
2. Wear and Life Issues
The high-pressure injection molding of the bottle body is easily to wear the insert surface.
(1) Use wear-resistant S136 pre-hardened steel (HRC 50-52).
(2) Use slow precision wire cutting and precision grinding instead of CNC lathe machining to reduce surface defects and thermal damage, thereby optimizing the fatigue performance and long-term durability of the parts.

Results:
The flash defect rate was reduced from 3.2% to 0.2%, and the insert life was increased by 10%.