Ensuring the mold accuracy of Injection molding precision parts is a crucial part of the injection molding process. Here are some key steps and strategies to ensure the high precision of the mold:
Material selection:
Select high-quality alloy tool steel with high mechanical properties and low thermal creep as the material of mold accessories. These materials can withstand deformation under high pressure and high temperature and maintain stable dimensional accuracy.
For key parts such as cavities and runners, materials that have undergone strict heat treatment should be selected, which have high hardness, wear resistance, corrosion resistance and resistance to thermal deformation.
Mold design:
Reasonable design of mold accessories is the basis for obtaining accuracy. The size and tolerance of the mold should be accurately determined, and technical measures should be taken to prevent shrinkage errors, injection deformation, demolding deformation and other problems of injection molded products.
When designing the mold, it is necessary to consider the tempering treatment or low-temperature treatment of the residual austenite structure of the mold material heat treatment to prevent aging changes and change the dimensional accuracy of the mold.
The mold structure should ensure the dimensional stability of the injection molded parts, such as using a multi-point positioning structure to reduce the deformation of the mold.
Mold processing:
The processing accuracy of the mold directly affects the dimensional accuracy of the injection molded parts. Therefore, during the mold processing process, high-precision processing equipment and processes should be used to ensure the dimensional accuracy of the mold.
Grind, grind and polish the cavity parts to improve the surface quality and dimensional accuracy of the mold.
Mold maintenance and inspection:
Maintain and inspect the mold regularly to ensure that the mold is in good working condition.
Use precision measuring tools for dimensional inspection, such as micrometers, projectors, etc. to ensure that the dimensional accuracy of the mold meets the requirements.
Process parameter optimization:
According to the characteristics of the injection molding material and the requirements of the product, reasonably set and adjust the process parameters such as injection pressure, injection speed, injection temperature, etc. to reduce the impact on mold accuracy.
Operation and management:
Provide professional training for operators to ensure that they understand and follow the correct operating procedures and precautions.
Establish a sound quality management system to continuously monitor and improve mold accuracy.
In summary, through reasonable selection of materials, optimization of mold design, use of high-precision processing equipment and processes, regular maintenance and inspection, and optimization of process parameters, the mold accuracy of Injection molding precision parts can be ensured, thereby improving the dimensional accuracy and product quality of injection molding parts.
