Problems needing attention in mold design of 500 cases（1、 Structural design to improve strength and stiffness

1. Avoid too far away from the force bearing point and the support point
2. Avoid cantilever structures or reduce the length of the cantilever
3. Do not ignore the beneficial effects of working loads
4. Avoid friction force transmission for parts subject to vibration loads
5. Avoid unbalanced forces in the mechanism
6. Avoid considering only a single force transmission path
7. The influence of part deformation on stress distribution during operation should not be ignored
8. Avoid large tensile stress on iron castings
9. Avoid bending stress on thin rods
10. Avoid excessive rigidity of parts subjected to impact loads
11. Avoid excessively rough or scratched surfaces of parts subject to strain stress
12. The surface of parts subject to strain stress shall be free from residual tensile stress
13. Stress concentration should be avoided or reduced for parts subject to variable loads
14. Avoid local structures that affect strength being too close together
15. Avoid pre deformation in the same direction as the deformation caused by the working load
16. The diameter of the pulley and drum of the wire rope should not be too small
17. Avoid too many times of bending of the steel wire rope, and pay special attention to avoiding repeated bending
18. When lifting, allowance shall be reserved at the connection between the steel wire rope and the drum
19. Intermediate parts that can not transmit force should be avoided as much as possible
20. Try to avoid additional forces caused by misalignment of the axis during installation
21. Minimize the force acting on the foundation