Key points of Maintenance of Moulds

When molds for plastic injection molding are used for molding in mass production, the performance of molds decreases gradually due to wear, rust, etc. Maintenance (maintenance management) is necessary in order to repair such decreases in performance.

It is recommended to pay attention to the following points as the key points in the maintenance of molds for plastic injection molding.

1. Scratches in the pinch off surface of the core pin.
2. Wear in the pinch off surface of the core pin.
3. Fusing of the pinch off surface of the core pin.
4. Depression in the butting surface of the core pin.
5. Scratches and corrosion in the mirror finished parts.
6. Peeling off of electroplating.
7. Wear and deformation of the submarine gate hole.
8. Wear and deformation of the pin point gate hole.
9. Depression in the periphery of the parting surface.
10. Wear of the ejector pin hole.
11. Biting of the ejector sleeve hole.
12. Soot collected in the air vent parts.
13. Biting of the sliding surface of the slide core.
14. Weakening of the coil springs.
15. Warping and deformation f the cavity frame.
16. Cracks in the corner parts of the cavity.
17. Biting of the ejector guide pin and bush.
18. Wear in the nozzle touching surface of the sprue bush.
19. Adhesion of scale and rust in the cooling water hole.
20. Water leakage in the cooling water hole.