Plastic Mould Ejector Types And Its Application

Ejector position

Ejected 10 – 15mm away from the edge of molding product (controlled by the retainer plate)

Ejection types

1. Pin Ejector   

2. Blade Ejector  

3. Ejector Sleeve  

4. Stripper Bar Ejector

5. Stripper Plate Ejector

6. Lifter  

7. Air Ejector

Basic ejection requirements

1. Product evenly ejected without ejection marks, unbroken and in shape;

2. Main ejection parts: walls, ribs, holes, and bars;

3. Set a standstill locking where the gradient or slope is slight;

4. Add skid-proof stripes where the gradient is steep;

5. The pin is level with or 0.2mm higher than the parting surface;

6. The interval between ejector pins needs to be an integer;

7. Ejector pin is at least 1mm away from the parting surface; if the parting surface is higher than 30mm, it should be at least 2mm away from the edge; if the parting surface is higher than 60mm, it should be at least 3mm away from the edge;

8. Set a 0.5mm clearance between ejector pin and ejector plate & B plate;

9. Set a 20mm, 30mm, and 35mm clearance between ejector pin and parting surface for small, medium, and large size molds;

10. Better more than less, better large than small.

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