What kind of material is generally used in processing molds?
Hardware molds: including stamping dies (such as punching dies, bending dies, drawing dies, turning dies, shrinkage molds, undulating dies, bulging dies, shaping dies, etc.), forging dies (such as die forging dies, upsetting forging dies, etc.), extrusion dies, extrusion dies, die-casting molds, forging dies, etc.; non-metallic molds are divided into: plastic molds, inorganic non-metallic molds, sand molds, etc.
The basic characteristics of the mold: (1) high processing accuracy requirements A mold is generally composed of a concave die, punch and mold base, and some may also be multi-piece assembly modules. Therefore, the combination of upper and lower molds, the combination of inserts and cavities, and the assembly between modules all require high machining accuracy. The dimensional accuracy of precision molds is often in the μm level.
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(2) Complex shape and surfaceSome products, such as automobile panels, aircraft parts, toys, and household appliances, have a surface shape that is composed of a variety of curved surfaces, so the mold cavity surface is very complex. Some surfaces must be mathematically calculated.
(3) The production of small batches of molds is not a large batch of production, and in many cases only one payment is often produced.
(4) There are many processes in mold processing, such as milling, boring, drilling, reaming and tapping. (5) Repeatable production The use of molds has a lifespan. When the use of a mold exceeds its life, it is necessary to replace it with a new mold, so the production of molds is often repeated.
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What mold steel is used for PA66 plus 30 glass fiber?
The steel used in plastic molds with glass fiber has the following principles;
1) The hardening hard material of conventional plastic mold steel with hardness HRC50-52, such as: S136, 2083, H13, 8407, SKD61, etc., these mold steel is used only for plastic molds with glass fiber, which can be used, but it is easy to scratch and wear.
The root cause of the easy wear of these quenched hard materials is that their carbon content is too low, with a carbon content of about 0.4%, which belongs to medium and low carbon steel, and the wear resistance of low carbon steel is worse than that of medium carbon steel, and medium carbon steel is worse than that of high carbon steel
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2) The high hardness quenched hard material with hardness HRC52-58 is the best choice at this stage, such as: Lg, 8566, 8566 reinforced type. These 3 types of mold steel for glass fiber molds are not easy to scratch, have a long mold life, and have a good product finish.
The reason is that they not only have high hardness, they are also medium carbon steel, high alloy steel, wear resistance has been improved by a grade, and both have good toughness and mirror polishing performance, the mold will not crack, and can be mirror polished to 10,000-12000, reduce the friction coefficient of the mold cavity surface, multi-pronged to improve the wear resistance of the mold steel, to prevent the scratching of the glass fiber mold.