The twice core-pulling of the core structure is based on adding a stripper plate to the core priority core-pulling structure, as shown in figure 1, under the designation, we can have twice core-pulling system.
Design specifications:
1. Open the PL1 first, then work on PL2, lastly, open PL 3.
2. Adding a group of parting lock between plate A and stripper plate 2 to open PL1 first, putting a group of parting lock between plate A and stripper plate 1 to make sure that the PL2 will be opened earlier than PL3 but later than PL1.
3. You should do a stop block between stripper plate 1 and stripper plate 2, plate B and stripper plate 2, the stop stroke is equal to the distance of core-pulling.
4. You have to design a guide structure between stripper plate 1, stripper plate 2, plate B.
