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What are the characteristics of precision molds?

Jun. 21, 2024

Compared with ordinary molds, precision molds have higher requirements in the production process. For their raw materials, design, processing, precision, size and other contents, they must be refined, and the processing technology must be high-precision processing molding technology. What are the specific requirements and characteristics of precision molds? The engineers of Huanke Precision collated and collected relevant contents for everyone.


Third, the material of the mold shell is good, and the rigidity is sufficient. Concave mold outline size precision. high smoothness and accuracy between templates;


Six molding requirements for precision molds.


Precision mold processing must focus on precision, precision mold for size tolerance requirements are very high, generally in +/-0.005. The main specifications of many precision molds are not allowed to have slopes, but the mold production will generally flexibly use tolerance levels plus a small inclination, such as transmission gear mounting posts. Precision molds must consider the operability and controllability of processing when designing drawings to ensure smooth processing.


First, the product specifications high precision, size tolerance small, both high-precision specification limits;


Four characteristics of precision mold


Second, the repeated precision standard of the product is high, and there must be a day. months. reliability of the size of the year;


1, wear resistance


When the blank material is plastically deformed and transformed in the female mold of the injection mold, it flows and rolls along the surface of the mold cavity, causing intense friction between the surface of the mold cavity and the blank material, thus causing the abrasive tool to be invalid due to damage. Therefore, the corrosion resistance of the data is the most basic model shell. One of the most important characteristics.


Strength is the primary factor that jeopardizes wear resistance. In general, the higher the strength of the mold parts, the smaller the wear rate and the higher the wear resistance. In addition, the wear resistance is also related to the type of carbides in the data. Total. shape. size and distribution.


Fourth, the selection of high-precision plastic machine to replace the basic plastic machine;


2. Strong ductility


5. Select high-precision forming processing technology;


Most of the operating standards of the mold shell are very extreme, and some often bear a large impact load, which leads to brittle fracture. In order to avoid sudden brittle fracture of mold parts at work, high-precision metal molds should have high hardness and ductility.


6. Select raw materials that are integrated into high-precision forming.


The ductility of moldings depends crucially on the carbon content of the raw materials. Grain size and structure-precision mold manufacturing.


3. Fatigue cracking characteristics


Fatigue usually results from prolonged exposure to cyclic stress during the mold's work cycle. The type has small kinetic energy repeated impact fatigue fracture. Rashen fatigue crack touch fatigue crack and bend fatigue crack.


The compressive strength is the key to fatigue cracking characteristics of moldings. Ductility. strength. And impurities in its raw materials.


4, high temperature characteristics


When the operating temperature of the mold is higher, the strength and hardness will be reduced, resulting in initial damage or plastic deformation of the mold. Therefore, precision metal mold steel should have high quenching reliability to ensure that the mold shell has high strength and compressive strength at ambient temperature.


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