1. Material selection is the key
To improve the toughness of injection molding precision parts, we must first start with the selection of materials. Choosing engineering plastics with high toughness is the basis, such as polycarbonate, polyamide, etc. These materials themselves have good impact resistance and fatigue resistance. At the same time, you can also consider adding some special additives, such as toughening agents, to further improve the toughness of the material. When selecting materials, you must fully consider the use environment and working conditions of the parts to ensure that the performance of the material can meet actual needs.
2. Optimize injection molding process parameters
Injection molding process parameters also have an important influence on the toughness of parts. Reasonable adjustment of parameters such as injection molding temperature, pressure and cooling time can improve the fluidity and filling effect of plastic melt, reduce internal defects, and thus improve the toughness of parts. For example, appropriately increasing the injection molding temperature can make the molecular chain more stretched and enhance the toughness of the material; controlling the injection molding pressure can ensure that the melt fully fills the mold cavity and improves the density of the parts. At the same time, optimizing the cooling time can reduce the generation of internal stress and avoid problems such as cracking of parts during cooling.
3. Improve part design
The design of the part also has a great influence on its toughness. During the design process, sharp corners and thin-walled structures should be avoided as much as possible, because these parts are prone to stress concentration and reduce the toughness of parts. The use of rounded corner transitions and reasonable wall thickness design can effectively disperse stress and improve the impact resistance of parts. In addition, the strength and rigidity of parts can be improved by adding structures such as reinforcing ribs and bosses, which also helps to enhance their toughness.
4. Post-processing
Post-processing is also an effective way to improve the toughness of Injection molding precision parts. Common post-processing methods include annealing and humidity adjustment. Annealing can eliminate residual stress inside parts and improve the dimensional stability and toughness of parts. Humidity adjustment can make parts absorb an appropriate amount of water, thereby improving the toughness and impact resistance of materials. Through reasonable post-processing, the quality and reliability of parts can be further improved.
In short, improving the toughness of Injection molding precision parts requires starting from multiple aspects such as material selection, process parameter optimization, part design and post-processing, and comprehensively considering various factors to achieve the best toughening effect.
