What is the performance of the mold that needs to be confirmed before manufacturing?
First point: wear resistance
When the blank is plastic deformed in the mold cavity, it moves and slides along the surface of the mold cavity.Therefore, the material wear resistance is one of the most basic and important functions of the mold.
Hardness is the primary factor influencing wear resistance.Generally, the higher the hardness of the mold parts, the smaller the wear amount and the better the wear resistance.In addition, wear resistance is also related to the type, amount, shape, size and distribution of carbon in the calculation.
Second point: be patient
Most of the working conditions of the die are very harsh, some of them usually bear a large impact load, which leads to brittle cracking.In order to avoid the parts of the die suddenly brittle in the operation, mold to have a higher strength and patience.
The tolerance of the mold depends on the carbon content, grain size and microstructure.
Third point: fatigue cracking function
In the process of mould operation, fatigue cracking is often caused by long time of cyclic stress.Its way has little energy repeatedly impact fatigue crack, stretch fatigue crack touch fatigue crack and tortuous fatigue crack.
The fatigue and cracking function of the mold mainly depends on the strength, endurance, hardness, and the content of the mixture.
Fourth point: high temperature function
When the working temperature of the mold is higher, the hardness and strength will be reduced, leading to early wear or plastic deformation of the mold and failure.The mold data should be of high tempering stability to ensure that the mold is of high hardness and strength at the operating temperature.
Fifth point: cold and heat exhaustion
Some molds are in the state of repeated heating and cooling during operation, which makes the mold surface subjected to tension and pressure change stress, causing exterior cracking and shedding, increasing the conflict force, preventing plastic deformation, reducing the scale accuracy, and then causing the mold failure.Cold and hot exhaustion is one of the primary ways of failure of hot die.
Sixth: corrosion resistance
Some molds, such as plastic molds, are decomposed into hci, hf and other highly corrosive gases due to the presence of chlorine, fluorine and other elements in the molding guess during operation, which corrodes the appearance of mold cavity, increases the roughness of its appearance, and aggravates the failure of wear.