A precision injection mold has dimensional tolerances controlled below 1/3 of the dimensional tolerance of products. The precision of the mold depends on the precision of the cavity size and number of cavities in the design, positioning of the cavity, precision of the parting surface, material selection, and dimensional tolerance. The thickness of the bottom plate, supporting plate, and cavity wall as well as the runner size are all important factors of the precision mold. Design engineering is equally important. The mold is usually made of alloy steel, which has high mechanical strength.
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