| Conversion Between Different Units of Yield Strength | |||||
|---|---|---|---|---|---|
| kgf/cm² | MPa | MPa | kgf/cm² | ||
| 61.78 | 632.214 | ||||
| Calculation Formula 1 | |||||
| Ejection Force (kgf) | Ejection Force, Ft (N) | Mold Core Area Enveloped by Side Walls and Ribs, A (mm²) | Coefficient of Holding Force per Unit Area on the Core P (2.4–3.9) / (0.8–1.2) (10^7 Pa) |
Coefficient of Friction between Plastic Part and Steel µ (0.1–0.3) |
Minimum Draft Angle (°) |
| 4772 | 46801 | ||||
| Calculation Formula 2 | |||||
| Ejection Force (kgf) | Ejection Force, Ft (N) | Mold Core Area Enveloped by Side Walls and Ribs, A (mm²) | Adhesion Force between Plastic Part and Mold (0.5–1.5) (MPa) |
||
| 2753 | 27000 | ||||
| Ejection Stress per Unit Area, A (MPa) | Ejection Force, FtC (N) | Total Contact Area of Ejector Pins / Blocks / Lifters (mm²) |
Tensile Yield Strength of Plastic, B (MPa) |
There is a risk of ejector pin marks or ejection cracks on the part. Consider increasing the ejection contact area by adding ejector pins, ejector blocks, or lifters.
|
|
| 78.00 | |||||