Factors affecting the quality of die casting.
With the continuous development of science and technology, the demand for die-casting products is getting higher and higher. There are high requirements for safety and aesthetics. The control of surface temperature of die casting mould is very important for high quality die casting. Uneven or inappropriate mold temperature will cause casting standard unsafe, out in the process of producing casting deformation, thermal stress, sticky mold, in appearance sub-sag, shortcomings and so on shrinkage and thermal bubble inside. When the temperature difference is large, the variables in the production cycle, such as filling time, cooling time and spraying moment, are different.
The die casting parts are not formed, and the cavity is filled with discontent.
Factors: 1. The temperature of die casting mold is too low; 2. Low metal liquid temperature; 3. The press pressure is too small, 4. The air doesn't come out.
Adjustment: 1. 2. Progressive die casting mold, metal liquid temperature; 3. Replace the large pressure die casting machine. 4. Add the satisfied metal liquid, reduce the injection speed, and increase the inlet thickness.
1. The planning of die-casting parts, in the time of planning, should pay special attention to the construction of the die casting parts as far as possible. Otherwise, there are defects such as pits, holes and cracks in the die casting. The standard request of shenzhen aluminum alloy die casting is accurate and reasonable. Otherwise, the formulation and management of die planning, processing and management are unnecessary. And it will produce a lot of substandard goods.
2. The structure, machining accuracy and selection of mold materials are also selected. The aluminum alloy die casting is made by die casting, and the material selection of the mold is also connected with the quality of the product. The mold structure is not good enough, and it is difficult to qualify the product even if it is technically adopted.
3, casting material of shortening rate: casting data shortening rate usually with a uniform percentage or to have, must change the way the size of the percentage given precision mold die casting planning time to note that all the more necessary do experiment mould first. After the data is obtained on the experimental mould, it is planned and manufactured for many moulds.
4. The preparation and performance of the technology: the formulation of die-casting technology is determined by the technical level of the operator, the mold and the quality of the die casting equipment. Nowadays, it is difficult for China to control the parameters of die-casting technology under the conditions of die-casting equipment, and it is difficult to achieve stability, reliability and accuracy.
Die casting is a kind of pressure casting parts, is to use the installed pressure casting mold casting machine die casting machine, the heating for liquid copper, zinc, aluminium (alloy), and other metal poured into the die casting machine into the mouth of the die casting machine die casting, casting the shape and dimensions of the mould limit of copper, zinc, aluminium (alloy) parts.
The quality of aluminum alloy die casting is good. For more information on die casting molds, please visit http://www.harrellland.net/.