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How to preliminary template processing
by：Lisson
2020-11-20
A preliminary before heat treatment for the template processing: good guide pin holes, return hole, hole cavity, gate set of hole, hole, coolant passages, etc. , milling good runner, cavity, some good mould should also milling oblique guide box, etc.
Ordinary precision mold template
now generally used Cr12, Cr12MoV, and some professional die steel, such as Cr12 hardness is not too high, often cracks during 60 HRC, template commonly used hardness is about 55 HRC. The core hardness can be above 58 HRC. If the material is 3 cr2w8v, manufacturing in nitriding treatment after surface hardness, hardness should be more than 58 HRC, nitride layer is thicker, the better. Plastic pieces of beautiful, is directly related to gate runner design is bad, prone to defects. In the absence of any block is easy to produce the serpentine flow. For the high requirements of the product, but also should design the overflow and exhaust. Overflow can turn the plunger, don't leave the overflow on the template flash, it doesn't influence the die life.
now generally used Cr12, Cr12MoV, and some professional die steel, such as Cr12 hardness is not too high, often cracks during 60 HRC, template commonly used hardness is about 55 HRC. The core hardness can be above 58 HRC. If the material is 3 cr2w8v, manufacturing in nitriding treatment after surface hardness, hardness should be more than 58 HRC, nitride layer is thicker, the better. Plastic pieces of beautiful, is directly related to gate runner design is bad, prone to defects. In the absence of any block is easy to produce the serpentine flow. For the high requirements of the product, but also should design the overflow and exhaust. Overflow can turn the plunger, don't leave the overflow on the template flash, it doesn't influence the die life.
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