How to consider the injection pressure and fluidity of the product in the mold design of the injection mold?
The design of injection molds is a key link, among which it is crucial to consider the injection pressure and fluidity of the product. Injection pressure and fluidity directly affect the molding quality and production efficiency of the product. This article will introduce how to consider the injection pressure and fluidity of the product in the design of injection molds to ensure the quality and production efficiency of the final product.
1. Consideration of injection pressure:
Product structure design: When designing the product structure, factors such as the wall thickness, size and shape of the product need to be considered. Different product structures will have different effects on the pressure during the injection molding process, so it is necessary to determine the appropriate injection molding parameters according to the specific situation of the product.
Mold design: In mold design, the structural strength and stability of the mold need to be considered to withstand the high pressure generated during the injection molding process. Reasonably design the wall thickness and support structure of the mold to ensure that the mold does not deform or break during the injection molding process.
Cooling system design: The design of the cooling system has an important influence on the injection pressure. By reasonably arranging cooling water channels and cooling holes, the mold temperature can be controlled, the cooling efficiency can be improved, the injection pressure can be reduced, and product deformation and defects can be reduced.
Ejector system design: The design of the ejector system is also closely related to the injection pressure. By rationally designing the structure and working mode of the ejection system, the product can be smoothly demolded, the impact on the product can be reduced, and the injection pressure can be reduced.
2. Consideration of fluidity:
Product structure design: The structural design of the product directly affects the fluidity of the plastic in the mold. When designing the product structure, factors such as the wall thickness, fillet, and chamfer of the product need to be considered to reduce the resistance of the plastic during the flow process and improve the fluidity.
Mold design: The design of the mold will also affect the fluidity of the plastic. By rationally designing the runner and gate of the mold, the resistance of the runner can be reduced and the fluidity of the plastic can be improved. At the same time, the temperature of the plastic can be controlled by designing a suitable cooling system to affect its fluidity.
Material selection: Different plastic materials have different fluidity characteristics. When selecting injection molding materials, it is necessary to consider the design requirements and molding performance of the product and select suitable plastic materials to improve the fluidity and molding quality of the product.
Injection molding process parameters: During the injection molding process, the fluidity of the plastic can be controlled by adjusting parameters such as injection speed, pressure, and temperature. Reasonable selection of injection molding process parameters can improve the molding quality of the product and reduce product defects and deformation.
In summary, considering the injection pressure and fluidity of the product is a crucial part of injection mold design. By rationally designing the product structure, mold structure, cooling system, ejection system, and selecting appropriate materials and injection molding process parameters, the molding quality and production efficiency of the product can be improved to ensure that the product quality meets the requirements. In actual production, injection mold designers need to comprehensively consider various factors and continuously optimize the design plan to meet customer needs and market competitiveness.
