1. The roof should be smooth, no stuck, no abnormal sound.
2. The inclined top surface should be polished, and the inclined top surface is lower than the core surface.
3. The sliding parts shall be provided with oil groove, and the surface shall be nitrided, and the surface hardness shall be above HV700 after treatment.
4. All push rods shall have a stop position and each push rod shall be numbered.
5. Limit the ejecting distance with a limit block.
6. Return spring should be standard parts, the two ends of the spring shall not be polished, cut off.
7. Slider, core-pulling should have travel limit, small slider with spring limit, spring inconvenient installation can be used when the wave screw; Cylinder core pulling must have a travel switch.
8. The slide block core-pulling generally adopts the inclined guide column, and the Angle of the inclined guide column should be 2°~3° smaller than that of the locking surface of the slide block. If the stroke of the slider is too long, the oil cylinder should be used to pull out.
9. When the end face of the cylinder core-pulling forming part is covered, the cylinder should add a self-locking mechanism.
10. There should be a wear plate below the large slide block with a width of more than 150 mm. The wear plate material should be T8A, and the hardness of the wear plate is HRC50~55 after heat treatment.
11. Push rod should not move up and down.
12. Add barbs on the top rod, the direction of the barbs should be consistent, and the barbs are easy to remove from the products.
13. The matching gap between the ejector hole and the ejector hole, the length of the sealing section and the surface roughness of the ejector hole shall be in accordance with the standards of relevant enterprises.
14. The product should be convenient for the operator to remove.
