1. Touch-and-puncture position. Puncture position keeps 0.02MM FIT mode in the protruding position of rear die.
2. There should be no burrs in the processing, so that the smoothness can be guaranteed and the tolerance must be achieved. (General overall tolerance 0.010)
3. Pin holes should be machined according to tolerance requirements.
4. Gates and runners are processed by machine tools (CNC, EDM) strictly according to the drawing size, and the smoothness is ensured. Hand-polishing and rough knife lines are firmly prohibited.
5. The surface of the front and rear dies should not be flawed, pitted, rusted and other defects that affect the appearance. The parting surface is kept clean and tidy, and the sealing part has no depression, and the accuracy is guaranteed. Front and rear die reinforcement, column surface, no spark pattern, knife marks, and try to polish. The surface of the cylinder pinhole is finely twisted with a cutter without spark pattern or knife marks.
6. Whether the depth of the exhaust groove is less than the overflow value of plastic, less than or equal to 0.02mm, the exhaust groove is processed by machine tools, and there is no trace of polishing by hand grinder.
7. Cup head hole side negative 0.01MM - 0.02MM, the bottom should generally be deep - 0.02MM.
8. Unified rear die with tiger-mouth coordination protrudes negative 0.05MM on one side of tiger-mouth and ensures plane and R-angle avoidance.
9. Optical number of occipital position, the occipital position and the parting surface are 12.00MM and the escape depth is over 0.2MM, so the plane can not be avoided.
10. Inserts and needles should be positioned and fixed reliably, and circular parts should stop rotation. There is no copper or iron pad under the insert, and the internal die workpiece and insert are not allowed to be welded.
11. The sucker hole, the cylinder hole and the top pinhole are all processed by line cutting and matched smoothly. The end face of the top rod is consistent with the core.
12. The small rounded corners of R0.3-R0.5mm should be inverted around the groove of the waterproof rubber ring to avoid the crushing of the rubber ring during the moulding.
13. The parts and components of the mould should be numbered. No. is allowed to be manually processed with a grinder. The front and rear die kernels can be carved with a flat milling cutter at the base angle. The rest of the parts are coded for CNC or etching. Require clear handwriting, beautiful, neat, even spacing.
14. Mould design drawing must be processed in accordance with customer's confirmation. If there are any changes, please inform customer or project personnel in time.
15. Mould embryo should keep its surface clean and free from scratches. It should not be knocked at will.