1.Shaped product appearance, size, fit
1) Defects on the product surface are not allowed: lack of material, burnt, top white, white lines, peaks, blistering, whitening (or cracking, breaking), baking, and wrinkles.
2) Weld line: Generally, the length of circular perforation weld line is not more than 5mm, and the length of special-shaped perforation weld line is less than 15mm, and the weld line strength can pass the functional safety test.
3) Shrinkage: Shrinkage is not allowed in the obvious areas of the appearance, and slight shrinkage is allowed in the unobvious areas (there is no dent in the hand).
4) Generally, the flatness of small products is less than 0.3mm. If there are assembly requirements, the assembly requirements must be guaranteed.
5) There should be no air lines or material flowers in the obvious appearance, and the product generally should not have bubbles.
6) The geometric shape and size accuracy of the product should meet the requirements of the official and effective mold drawing (or 3D file). The product tolerance should be based on the tolerance principle. The shaft size tolerance is a negative tolerance, and the hole size tolerance is a positive tolerance. Customers have As required, as required.
7) Product wall thickness: The product wall thickness is generally required to be average wall thickness, non-average wall thickness should meet the requirements of the drawing, and the tolerance should be -0.1mm according to the characteristics of the mold.
8) Product coordination: the surface shell and the bottom shell are matched-the surface misalignment is less than 0.1mm, and there can be no scratching. The holes, shafts and surfaces that have the matching requirements must ensure the matching interval and use requirements.
2.Mold appearance
1) The mold nameplate has complete contents, clear characters, and neat arrangement.
2) The nameplate should be fixed on the mold foot near the template and the reference angle. The nameplate is reliable and not easy to peel off.
3) Cooling water nozzles should be made of plastic block water nozzles. Customers have other requirements according to their requirements.
4) The cooling water nozzle should not protrude from the surface of the mold base.
5) The cooling water nozzle needs to be processed with counterbore. The counterbore diameter is 25mm, 30mm and 35mm. The orifice is chamfered and the chamfering should be the same.
6) The cooling water nozzle should have entry and exit marks.
7) Mark English characters and numbers should be greater than 5.
8) The location is 10mm directly below the tap, and the writing should be clear, beautiful, neat and evenly spaced.
9) Mould accessories should not affect the hoisting and storage of moulds. During installation, there are exposed oil cylinders, faucets, pre-reset mechanism, etc., which should be protected by supporting legs.
10) The installation of the supporting legs should be fixed on the mold base with screws passing through the supporting legs. Over-long supporting legs can be fastened on the mold base with a machined external threaded column.
11) The size of the ejector hole of the mold should meet the requirements of the specified Injection Molding Machine. Except for small molds, one center cannot be used for ejection.
12) The positioning ring should be fixed and reliable. The diameter of the ring is 100mm and 250mm. The positioning ring is 10-20mm higher than the bottom plate. Unless otherwise requested by customers.
13) The external dimensions of the mold should meet the requirements of the designated injection molding machine.
14) For molds with orientation requirements, an arrow should be used to indicate the installation direction on the front or back template, and there should be "UP" next to the arrow. The arrow and text are both yellow and the height of the text is 50 mm.
15) The surface of the mold base should not have pits, rust marks, redundant rings, water vapor in and out, oil holes, etc., and defects that affect the appearance.
16) Moulds should be easy to hoist and transport. Mould parts must not be disassembled during hoisting. Lifting rings must not interfere with faucets, cylinders, pre-reset rods, etc.
