Mold Accessories

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1, resistance to abrasion

Billet in mold cavity in plastic degeneration, both flowing and sliding along the cavity surface and produces intense friction between the cavity and billets, resulting in mold failure due to wear. Wear resistance of the material is the most basic, one of the most important properties of mold.

Hardness are the main factors influencing wear resistance. Generally, mold high hardness, wear less, better wear resistance. In addition, carbide in wear resistance and material type, number, shape, size, and distribution.


Strength and toughness of 2,

Die working conditions are very poor, often bear the brunt of greater loads, which can lead to brittle fracture. While working to prevent mold in the sudden brittle fracture, mold has a high strength and toughness. Die toughness depends on the carbon content of the material, grain size and texture.


3, fatigue fracture behavior

Work process, in which the long term effects of stress, often leading to fatigue. In the form of small energy impact tensile fatigue fracture on contact fatigue fracture and fatigue fracture and fatigue failure. Fatigue fracture properties of mould depends on the strength, toughness, hardness, as well as inclusion in the material content.


4, high temperature performance

When the working temperature of mold is high, and will decrease the hardness and strength, leading to mold early wear and tear or plastic deformation and failure. Therefore, the mold material has a high resistance to tempering stability to ensure mold at working temperatures, has a higher hardness and strength.


5, good fatigue properties of cold and hot

Some die in the course of work in a State of repeated heating and cooling, make the cavity surface tension, stress, stress the role of the surface cracking and flaking, increasing friction, preventing plastic deformation, reduced dimensional accuracy, resulting in failure. Heat fatigue is one of the main forms of hot work die failure, this type of mold is high resistance to fatigue properties of cold and hot.


6, corrosion resistance

Some molds, such as plastic mold at work, because of chlorine, fluorine and other elements in plastics, decomposing in the heat precipitated HCI, HF, strong corrosive gases, mold cavity surface erosion, increase the surface roughness, increasing wear.


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REP machinery co Ltd.

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