Proto-mold takes you to understand the design of automotive injection molding parts
Green automobile injection molding parts is a scientific strategy to achieve sustainable development.
It mainly refers to the technical system that can protect and improve the ecological environment, reduce pollution and reduce energy consumption throughout the life cycle of the product, according to the environmental value and use the full potential of modern science and technology, there is no unified definition and evaluation standards, the main content of its technical connotation: ecological health, environmental protection, and greater resource utilization.
A full set of solutions to achieve green automotive plastic parts research and development concept Automotive injection molding parts green is a full set of solutions system engineering.
China's automotive plastic parts research and development lag behind, basically can not independently develop high-end plastic parts.
An important aspect of the reason is that domestic research and development of automotive plastic parts, materials, product development, processing and manufacturing and molding equipment, waste recycling and other research institutions are independent, do not interact with each other, and there is no concept of a full set of solutions.
Plastic is the raw material of choice to achieve automotive lightweight.
The research and development of plastic raw materials for automotive injection molding parts must conform to the green technology of non-toxic and harmless health and circular economy.
Each injection molding product must determine its opening direction and parting line at the beginning of the design to ensure that the core pulling slider mechanism is reduced as much as possible and the parting line has no influence on the appearance.
After the mold opening direction is determined, the structure of the product, such as reinforcing bars, clasps, and bulges, is designed as much as possible to be consistent with the mold opening direction, so as to avoid core-pulling and reduce the stitching line and extend the life of the mold.
After the mold opening direction is determined, the appropriate parting line can be selected to avoid the reverse buckle in the mold opening direction to improve the appearance and performance.
The proper release slope can avoid product flaring (flaring).
The release slope of the smooth surface should be ≥0.5 degrees, the surface of the fine grain (sand) is greater than 1 degree, and the surface of the coarse grain is greater than 1.5 degrees.
Proper demoulding inclination can avoid top damage, such as top white, top deformation, top break.
When designing the deep cavity structure product, the external surface inclination should be greater than the internal surface inclination as far as possible to ensure that the mold core is not biased during injection molding, and the uniform production of various plastics has a certain wall thickness range, generally 0.5 ~ 4mm, when the wall thickness exceeds 4mm, it will cause the cooling time to be too long, resulting in shrinkage and other problems, and should consider changing the product structure.
Uneven wall thickness will cause surface shrinkage.
Uneven wall thickness can cause porosity and weld marks.
The reasonable application of reinforcing bars can increase the rigidity of products and reduce deformation.
The thickness of the reinforcement must be ≤(0.5 ~ 0.7)T product wall thickness, otherwise it will cause surface shrinkage.
The slope of the single side of the stiffener should be greater than 1.5° to avoid jacking injury.
Too small rounded corner may cause product stress concentration, resulting in product cracking.
Too small rounded corner may cause stress concentration in mold cavity, resulting in cavity cracking.
Setting a reasonable rounded corner can also improve the processing technology of the mold, such as the cavity can be directly milled with R knife, and avoid inefficient electrical processing.
Different rounded corners may cause the movement of the parting line, and different rounded or clear corners should be selected according to the actual situation。
Proto mold can not only make Rapid prototypes, but also make injection molds. If your project is 500-1000 pieces of products and you do not know which processing method to use, please contact PROTOMOLD, we will provide you with suggestions and use the most favorable plan to complete the production.
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