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Requirements for Standardization of Plastic Mould Manufacturing

发布时间:2018-09-05 浏览次数:268次

In order to improve the quality of molds, minimize complaints about mold quality problems, hand over the molds to customers for satisfaction, summarize and summarize common problems in mold manufacturing, and establish standards for implementation as required.
1. For a mold blank smaller than 2020, a pry hole shall be made between plates A and B; For molds larger than 2020, all templates, including thimble plates, shall be provided with prying pits.
2. The mold blank guide post and guide sleeve should be machined with exhaust groove to prevent the guide post and guide sleeve from pulling.
3. There shall be no sharp corners on the mold and chamfering is required. Except where specifically specified.
4. Internal mold and mold parts shall not be welded without consent.
5. The periphery of the mold products must be provided with vent slots in appropriate positions. Please refer to the mold design manual for the vent slot specifications.
6。 Avoid using a grinder to polish the mold as much as possible。 If you do not want to use a grinder, you must use oilstone to save light ( especially parting surface )
7。 The surface treatment of the internal mold glue level surface must be carried out in accordance with the BOM or other officially notified technical requirements。 The processing lines on the non-adhesive surface ( wire cutting, milling machine, CNC gong bed, spark machine ) should also be lightened with oilstone。
8。 All internal mold materials and mold blank grade requirements must be purchased according to the order or the technical requirements formally confirmed in the design review process。 Material certificate must be provided, and heat treatment report must be provided if it is a hard mold。 All relevant certificates。
9。 The front and rear inner molds, inserts, rows, inclined tops, straight tops ( push blocks ), shoveling chickens, etc。 of all molds need to be machined with a waist-round pit on the bottom or side to carve out the material name and hardness。
10. Important wear parts such as row position, push block, shovel chicken, and pump mouth must be nitrided and hardened.
11。 Line position must have positioning。 Positioning methods include slingshots, beads, Hasco ( DME ) standard line clamps and so on, which need to be in accordance with the requirements of each project。 Line position need to have layering, wear plate。 The layering and wear-resistant plate must be made of wear-resistant hard material, and an oil groove must be added。
12。 The oblique guide pillar at the row position must be compacted and cannot be rotated or loosened。 The tail of the inclined guide pillar must be machined into a hemispherical or conical shape, which is conducive to ensuring the normal movement of the row position。 If there are two or more inclined guide posts in the same row, the length, size and inclination of the inclined guide posts must be the same。
13。 Wear - resistant hard materials must be used for inclined - top seats。 The inclined top must be machined with oil grooves。 The inclined top seat is usually hardened to HRC 40 - 45 degrees with 2510 or Cr12。 Because the inclined top seat is subjected to impact load, it cannot be too hard or it will break and chamfer the C angle at all right angles。 The inclined top guide plate ( bronze ) is required。 No welding is allowed。
14. Light saving # 400 - 600 is required for flow channel and glue feeding position.
15. The ejector pin, cylinder, barrel ejector pin, inclined top and ejector pin plate shall be engraved with corresponding identification codes to facilitate installation. If the position of the thimble is not horizontal on the product, the thimble holder needs to be made into " D" shape or the anti-rotation pin key should be used for positioning.
16. The thimble adopts Hasco or DME standard, and which mould technical requirements are decided by BOM or other official notification.
17. The processing of water transport aprons ( O - ring ) slots requires a 0.25 mm gap to be reserved unilaterally. Generally, aprons need to be pre-pressed 0.5 - 0.8 mm. If this is not taken seriously, aprons can easily be damaged by pressure and cause water leakage.
18。 To nitride the pumping nozzle, it is necessary to make a stop pin。 The nozzle radius must conform to the drawing requirements。 The mouth was not nitrided and may have been bruised before leaving the mold。
19。 The conventional structure of the mold must be arranged with supporting heads。 Both end faces need to be smooth。 The small mold is pre-pressed 0。1 mm and the big mold is pre-pressed 0。1 mm to 0。15 mm。 。。
20. The diameter of the positioning ring must conform to the drawing, and the form and position of the top stick joint must conform to the drawing.
21. Please refer to the BOM or the confirmed die drawing for the specifications of the water nozzle. The countersunk head hole of the water nozzle must be processed and installed according to the die drawing. Drilling shall not be deviated, and acute angles shall be chamfered.
22. Water transportation must be marked with INI, OUTI, IN2, OUT 2, ... ..
23. All marks on the mould must be neat, correct and not crooked.
24. The mold needs to be fitted with side locks ( straight locks ) on four sides. If the side lock cannot be installed, the taper lock or taper lock needs to be installed. Taper locks shall be installed transversely.
25。 All screws and mold fittings should be the first choice of standard parts, and screw heads cannot be sawn off。 The effective locking length of the screw must be sufficient, normally 1。5 or 2。
26. Hot nozzle trunking must be rounded to avoid scratching wires.
27。 Install the hot 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 acceptance according to the " mold check list" before packing and removing the mold。
29. Before moving the mold, the water pressure should be tested ( more than 100Pa ) and the water should be blown clean with a pneumatic gun after the water is accepted.
30. In the process of manufacturing the outer surface of the mold blank, care should be taken to prevent rust and scratches. Before packing, the inner mold needs to be sprayed with white / colorless rust inhibitor. All the mold surfaces must be cleaned and then buttered.
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