Impact of Die Casting Mold Processing and Processing Technology on Die Casting Mold Life
Die casting is a kind of metal casting process, and it is widely used in many fields of industry. Die casting is using molten metal forced into the mold at high pressure to obtain the parts with predetermined shapes and sizes. Die casting mold is the key to die casting technology and the performance of the die casting product, and its quality and service life directly affect the production efficiency and product quality of die casting industry. Properly processing and the right selection of die casting process parameters is the key to ensuring the die casting mold life and the good performance of die casting products.
Die casting molds have complex structure and long life expectancy. In addition, there are many factors for affect these two, so the mold processing and machining is also very important. Firstly, it needs to choose a suitable place for the die casting die. Generally, the area needs to be selected the flat, clean, and there is no dust, water, and the temperature must be stable and consistent. Pre- production processing is necessary for a good die casting die. The cutting and grinding processing is mainly used to eliminate the machining errors and improve the die casting die surface roughness and reduce noise, meanwhile, it also needs to eliminate the sharp edges at the machined surface, so that both the hardness of the mold and the toughness will not be compromised. High quality of processed die casting die will produce a good and consistent quality of products.
In order to maintain the die casting die with a long life expectancy, careful attention should be paid to the selection of processes and the right processing parameters. The most important factor in increasing the mold life expectancy is to control the injection pressure. The injection pressure will cause the mold deformation and wear, meanwhile, the plastic deformation of the die can cause the increase of the initial injection pressure and shortens the mold life expectancy. According to the size, shape, and strength of the die cast parts, the appropriate injection pressure needs to be selected. Selection of the injection pressure is best in the lower range, so that the mold components will not suffer from plastic deformation.
Another factor that affects the die casting mold life is the injection velocity. The injection velocity has an important impact on the product quality and service life of the die casting die. If the injection velocity is too high, it will lead to the increase of residual stress, and the change of the size and shape of the material, and then it will damage the die casting die and shortens its life. If the injection velocity is too low, the molten will cause gas exist in the material, which will go through the turbine passage and block the molten outlet, and then it will reduce the production efficiency and increases the reject rate. Therefore, the injection velocity needs to be appropriate for best performance and tool life expectancy.
Reasonable injection temperature and cooling conditions are also important to ensure the service life of the die casting die. High temperature of the molten metal will cause the increase of thermal stress and accelerated the cooling rate, and lead to the die casting die cracking and shorten its life expectancy. In the meanwhile, the coolinh conditions also need to be strictly controlled, and too slow cooling rate or excessive cooling rate will reduce the life of the die casting die. Therefore, the molten temperature and cooling cycle need to be optimized and improved to meet the requirements.
Finally, the proper maintenance of die casting die is essential to extending its service life. To prevent the environment contamination and wear, the die casting die need to be rinsed with clean oil on regular basis, and lubrication should be done periodically on the operating parts. At the same time, avoid overloading the die casting die and regular maintenance is also necessary to ensure its best performance.
In conclusion, proper processing technology, selection of the right processing parameters, and regular maintenance are the key factors for affecting the production efficiency and product quality of die casting industry, and to guarantee the die casting die with extended service life and good performance.
（2520字）
