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Four characteristics of precision injection molding tools
With the continuous development of society, people's requirements for plastic products are getting higher and higher, and precision injection molding processing has emerged. In order to carry out precision injection molding, in addition to the use of high-precision injection molding machines, plastic molds also need to be highly precise. Below we will briefly introduce the four characteristics of the precision injection molding mold.
1, wear resistance
When the blank is plastically denatured in the mold cavity, it moves and slides along the outside of the cavity, causing intense friction between the outside of the cavity and the blank. As a result, the mold is ineffective due to wear. Therefore, the wear resistance of the data is one of the most fundamental and important functions of the mold. Hardness is an important factor affecting wear resistance. Under normal circumstances, the hardness of the mold is higher, the wear is smaller, and the wear resistance is better. In addition, the wear resistance is not related to the variety, number, state, size and distribution of carbides in the guess.
2, toughness
The premise of the mold is mostly very inferior, and some often suffer from a large hit load, which leads to brittle fracture. In order to avoid the sudden break of the mold machine, the precision metal mold must have high strength and toughness. The toughness of the mold depends on the carbon content, grain size and structure of the material - precision mold manufacturing.
3, fatigue fracture function
During the mold process, under the long-term effects of the reincarnation stress, each time caused fatigue and fracture. In its situation, there are small energies that repeatedly attack fatigue breaks, stretch fatigue breaks, fatigue breaks, and tortuous fractures. The fatigue fracture function of the mold depends on its strength, toughness, hardness, and the amount of inclusions in the guess.
4, low temperature function
When the temperature of the mold is higher, the hardness and strength will be lowered, which will lead to the late wear or plastic deformation of the mold. Therefore, the precision injection mold should have high anti-tempering stability to ensure that the mold has high hardness and strength at the temperature of the workpiece.
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