2. Use ordinary steel or standard die parts and accessories with the same specifications.

3. All guide pins and bushings must protrude at the tail end.

4. All the paper sizes on the design surface of the mold should be fully opened, and production can only start after approval.

5. When machining the finished parts on the mold, half of the dimensional tolerance in the finished drawing should be taken as the machining tolerance, and the tolerance in the finished drawing should not be used for machining.

6. All units of measurement are English, length is in millimeters, weight is in kilograms, and degree-day is in degrees Celsius (C).

7. The pressure is expressed in English PSI,1psi =1psi =14.2kg/cm2.

8. Confirm the mold thickness, clamp the template stroke and eject the stroke.

9. At the hanging hole positions on the four sides of the male die and female die, there is at least one hanging hole on every adjacent two sides of the "A" plate and the "B" plate, and at least one side of other templates has hanging holes.

10. Any one of the four guide pins must be eccentric, that is, asymmetrical with the other three pins, so as to prevent the punch and the die from being clamped reversely.

1 1. Print the steel specification and hardness on the bottom surface of the die core.

12. List the materials in detail and indicate the specifications of materials and surface treatment, and indicate the wattage specification and voltage of the electric heater.

13. Print and number all mold parts.

14. Before packaging, both sides of the mold should be fixed with iron bars to avoid surface separation of the mold.

15. When there are multiple cavities in the same finished product, continuous numbering should be adopted to identify the cavities.

16. There should be hanging holes on the die base at the center of gravity of the die to avoid the die from tilting when hanging the die, and ensure that the thread and depth are sufficient to bear the weight of the die.

17. The parting line lock shall be installed unless there is a large area of step damage in the mold core.

18. When the depth of the rib is greater than 5mm, it is necessary to add an exhaust pin or make it with an insert at the bottom of the rib to facilitate plastic filling.

19. When the plane is broken with a pin, the top of the pin should be extended into the steel to avoid pressure loss or deformation of the top surface of the pin.

20. For the important parts of the finished product, the size should be reserved slightly to avoid repair welding caused by excessive processing size.

2 1. Mold core is not allowed to repair welding without permission.

22. Under special circumstances, when repairing the mold by repair welding, the mold should be made of the same material as covered electrode, so as to avoid different materials affecting the appearance of the finished product and leaving traces.

23. Tolerances of all components shall be controlled and no knocking marks shall be left.

24. Except for the parting surface, all templates should be chamfered.

25. The mold using electric heater must be attached with circuit diagram, so that the production unit can correctly wire it.

26. When the die needs chips, the draft angle should be at least 2 degrees, and the draft angle should be increased by 1 degree every 0.00 1 "depth. For example, when the depth is 0.003 ",the draft angle should be 5 degrees, and at least before shoveling, the surface of the mold cavity should be polished with #300 sandpaper.

27. Confirm that the mold cavity and mold base are strong enough.

28. Mold design should meet the requirements of the notes on the finished drawings.

29. Provide detailed drawings of all parts that do not belong to the standard specifications.

30. After the surface of the die core is electroplated, the die core should be heated to 500 degrees Fahrenheit with a thickness of 65438 0 inches and kept for 65438 0 hours to prevent the die core from embrittlement.

3 1. Pay special attention to the thickness and adhesion strength of electroplated parts, and peeling is not allowed after use.

32. The location map of the ejector pin of the plastic machine in the United States, the barb design at the end of the main material head, and the design of the pull rod of the three-piece die or the stripper die must all be designed with barbs. B. Key points of making mold assembly drawing