30 requirements for standard injection mold making
In order to improve the quality of plastic molds, minimize the complaints of molds quality, meet the needs of customers, summarize and summarize common problems in mold manufacturing, and establish standards for implementation as required.According to our production experience, we summarize the production standard mold as follows:
1. For molds less than 2020, pry pits need to be made between plates a and b;All forms greater than 2020, including thimble board between all forms to make pry mold pit;
2. The mold embryo guide pillar guide sleeve shall process the exhaust groove to prevent the guide pillar guide sleeve from pulling;
3. There shall be no sharp Angle on the mold, and chamfering treatment is required.Except where specified;
4. Internal mold and mold parts shall not be welded without consent;
5. The periphery of the mold products must open the exhaust groove in the appropriate position. Please refer to the mold design manual for the exhaust groove specification;
6. As far as possible, avoid sanding the mold with a sanding machine. If it is necessary to use a sanding machine, it is necessary to use a sharpening stone (especially the parting surface);
7. The surface treatment of the inner mold adhesive surface must be performed according to the bom table or other technical requirements formally notified.The processing lines on the non-adhesive surface (wire cutting, milling machine, CNC gongs bed, spark machine) should also be used to save bright.
8. All internal mold materials and mold grade requirements must be purchased in accordance with the order or the technical requirements officially confirmed in the design review process.Material proof must be provided, and heat treatment reports must be provided for hard moulds.All relevant certificates;
9. All molds, including front and back inner molds, insert pieces, row position, inclined top, straight top (push block), and shoveling chicken, need to process a waist round pit position on the bottom or side to carve out the material name and hardness;
10. Important wear parts, such as row position, pushing block, shoveling chicken, etc., must be treated with nitrification and hardening;
11. The rows must be positioned.Positioning methods include slingshot, ball bead, hasco(dme) standard line clip, etc.Row needs to have a layer, wear - resistant plate.Tie, wear plate must use wear - resistant hard materials, need to add oil groove;
12. The horizontal diagonal guide column must be compressed and not rotated or loosened.The tail of the oblique guide column must be machined into hemispherical or conical form, which is conducive to ensuring normal motion of the line.If there are two or more oblique guideposts in the same row, the length, size and inclination of the latter must be the same;
13. Wear resistant hard materials must be used for the tilting seat.The inclined top must process oil groove. The inclined top seat is generally stiffened to hrc40-45 degrees by 2510 or cr12. Because the inclined top seat is under the impact load, it cannot be too hard or it will break, and chamfered c Angle at all right angles.Diagonal roof guide plate (bronze) is required.No welding;
14. Light saving #400-600 is required for runner and entry level;
15. Ejector, mandrel, die ejector, diagonal roof and ejector plate shall be engraved with corresponding identification code for easy installation.If the position of the thimble is not horizontal on the product, it is necessary to make the thimble into "d" type or adopt the position of anti-pin key;
16. The thimble adopts the hasco or dme standard, and which mould technical requirements are determined by bom table or other formal notification;
17. For processing and transporting water rubber ring (" o "ring) groove, a 0.25mm gap should be reserved on one side. Generally, the rubber ring should be precompressed by 0.5-0.8mm.
The nozzles need to be nitrogenized.The nozzle radius must conform to the drawing requirements.The nozzle is not nitrified and may have been hit before walking.
19. The normal structure mold must be equipped with the supporting head, and the two ends need to be ground. The pre-pressing of the small mold is 0.1mm, and the pre-pressing of the large mold is 0.1mm-0.15mm.
20. The diameter of the locating ring shall conform to the drawing, and the form and position of the top bar joint shall conform to the drawing;
21. The specifications of the nozzle should be based on the bom table or the confirmed mold drawing, and the nozzle countersink hole should be processed and installed according to the mold drawing.No deviation from drilling hole, sharp Angle needs chamfer;
The water must be marked ini, outi, in2, out2...;
23. All the word marks printed on the mold must be neat, correct and not twisted;
24. Mold needs to be installed with side lock (straight lock) on four sides.If you can't install side locks, install taper locks, or taper locks.Taper lock shall be installed horizontally.
25. All screws and mold parts shall be selected as standard parts. The screw heads shall not be cut off.Effective screw locking length must be sufficient, normal is 1.5 or 2;
26. The groove of hot mouth must be rounded to avoid scratch of wire;
27. Install the hot tip id card at the side of the mold panel;
28. Mold handover and acceptance: the mold engineer shall cooperate with the mold engineer to pass the acceptance according to the "mold inspection table" before packaging and removing molds;
29. It is necessary to test the water pressure (over 100pa) before mold shifting. After the water is accepted, the water shall be cleaned by air gun.
30. The external surface of the mold shall be maintained in the manufacturing process to prevent rust and scratch.The inner mold needs to be sprayed with white/or colorless anti-rust agent before the molds are packed. All molds must be cleaned and buttered.