Our knowledge of mold in accordance with the relevant considerations when talking about the selection, combined with his years of experience, in many ways analyze and summarize the following, and I hope to help you understand the nature of the mold precautions in the selection of the.
Mold not only have to meet to meet the process of practicality, there must be some considerations in the selection of the mold:
1, wear resistance
Variability in the blank plastic mold cavity, the cavity surface along both flow and slide, so that the cavity surface generated intense friction between the blank, resulting in mold due to wear and failure. So wear resistance is essential mold, one of the most important performance.
Hardness is a major factor affecting wear resistance. In general, the higher the hardness of the mold parts, the smaller amount of wear, the better the wear resistance. In addition, the wear resistance of the type, quantity, shape, size and distribution of materials related carbide.
2, toughness
Die mostly very poor working conditions, some often bear a larger impact load, resulting in brittle fracture. To prevent mold parts suddenly brittle fracture at work, the mold should have a high strength and toughness.
Mold toughness depends mainly on the carbon content of the material, grain size and organization status.
3, fatigue fracture properties
Die working process, under the cyclic stress of long-term effects, often leading to fatigue fracture. In the form of many small energy impact fatigue fracture, fatigue fracture contact fatigue fracture tensile and bending fatigue fracture.
Fatigue fracture properties of the mold depends on its strength, toughness, hardness, and the content of the material inclusions. |
