Home > News > Content
30 Principles Of Standardized Production Of Injection Moulds
Jun 05, 2018

Core Tip: In order to improve the production efficiency and quality level of mold manufacturing, according to the summary and induction of common problems in the mold manufacturing process, the following 30 mold standardization production principles have been formulated.

 

    1. Mold blanks smaller than 2020, need to be used for die craters between a and b plates, and all die plates above 2020 should include die cavities between thimble plates.

 

    2. The guide bushing of the mold blank guide guides the exhaust groove to prevent the guide pillar guide from being damaged.

 

    3. There must be no sharp corners on the mold and chamfering is required. Except where specified

 

    4. The inner mold and mold parts must not be welded without agreement.

 

    5. The outer periphery of the mold product must be opened in a suitable place. For the specifications of the exhaust groove, please refer to the mold design manual.

 

    6. As far as possible to avoid using the grinding machine to polish on the mold, if you must use the grinding machine processing, you must use whetstone light (especially the parting surface)

 

    7. The surface treatment of the internal mold plastic surface must be performed in accordance with the BOM or other technical requirements formally notified. Non-rubber surface processing lines (wire cutting, milling machines, CNC boring machine, spark machine) also need to save light.

 

    8. All internal mold materials, mold level requirements must be based on orders, or the technical requirements formally confirmed in the design review process for procurement. Material certification must be provided. If it is a die, a heat treatment report must be provided. All relevant certifications.

 

    9. Before and after the mold of all molds, inserts, line position, inclined roof, straight top (push block), shoveling chicken, etc. need to be processed in the bottom or side of a waist round pit, the material name and hardness carved out.

 

    10. Important wearable parts such as row, push block, shovel, and pout must be nitrided and hardened.

 

    11. The position must be positioned. There are slingshots, wave beads, HASCO (DME) standard row clamps and so on. The specific needs of each project in accordance with the requirements. Lines need to be laminated, wear plates. Beads, wear plates must use hard wear, need to add oil tanks.

 

    12. The diagonal guide posts must be pressed tightly and cannot be turned and loosened. The tail of the inclined guide post must be processed into a hemispherical or truncated cone shape, which is conducive to the normal movement of the row. Where there are two or more diagonal columns on the same row, the length, size and inclination of the columns must be the same.

 

    13. Inclined seats must be hard wearing. The inclined roof must be machined with an oil groove. The inclined top seat is generally hardened to 25-40 or cr12 to hrc40-45 degrees, because the inclined roof seat is subject to impact load, so it cannot be too hard or it will break, and it will be chamfered in all right-angle positions. . Needed inclined guide plate (bronze). Do not weld.

 

    14. Flow channel and feeding position need to save light #400-600.

 

    15. The thimble, tube, thimble, inclined roof and thimble plate should be engraved with the corresponding identification code to facilitate installation. If on the product, the ejector pin position is not a horizontal plane, the ejector pin holder needs to be “D” shaped or positioned with anti-rotation pin.

 

    16. The thimble adopts HASCO or DME standards, and the choice of mold specification depends on the bill of materials or other officially notified mold specifications.

 

    17. Processing transport water rubber ring ("O" ring) groove, need to reserve a 0.25mm gap unilaterally, the general apron to pre-pressure 0.5-0.8mm. If you do not pay attention to this, the apron is easily damaged by pressure Lost, causing leakage.

 

    18. Pricking your mouth to nitriding, you need to do it. The mouth radius must meet the drawing requirements. The mouth is not nitrided, and it may have been hit before walking.

 

    19. The conventional structure mold must be equipped with support heads, both ends need to be flattened, small mold pre-pressing 0.1mm, large mold pre-pressing 0.1mm-0.15mm.

 

    20. The diameter of the locating ring must conform to the drawing, and the form and location of the top bar joint must conform to the drawing.

 

    21. The specifications of the spout must be based on the bill of materials or the confirmed figure. The countersunk head hole must be machined and installed in accordance with the model drawing. Drilling holes must not be drilled. Sharp corners must be chamfered.

 

    22. Water must be marked in1,out1,in2,out2...........

 

    23. All the words on the mold must be neat, correct, and must not be distorted.

 

    24. The mold needs to be installed on all sides of the side lock (straight lock). If you cannot install a side lock, you need to install a taper lock or a taper lock. Taper locks must be mounted sideways.

 

    25. All screws and mold accessories need to be the first choice standard, screw head can not be sawed off. The effective locking length of the screw must be sufficient, normally 1.5 or 2.

 

    26. The hot mouth slot must be rounded to avoid scratching the wire.

 

    27. Install the nozzle ID card on the side of the mold panel.

 

    28. Acceptance of mold transfer: It is necessary to cooperate with the mold engineer to pass the "mold check list" to pass the package to take the mold.

 

    29. Water transport should be tested before the mold is moved. Water pressure (100pa or more) After acceptance of the water, a water gun is required to blow the water clean.

 

    30. In the manufacturing process of the outer surface of the mold blank, care must be taken to prevent rust and scratches. Before the mold is packed, the inner mold needs to be sprayed with white and/or colorless rust inhibitor. All mold surfaces must be cleaned and then buttered.