The present situation of oil pump castings in China is both good and bad. I am glad that the production of oil pump casting has a certain foundation, and the development trend of plastic gear will bring more market space for oil pump casting; The concern is that there is still a distance between the domestic production level of oil pump castings and the world advanced level, and in the gear industry, especially the trend of the development of plastic gear industry, the domestic response to market changes is not keen enough, supporting research is difficult to keep up with the market demand.
Gear has two main uses, one is to transfer motion, the other is to transfer power. At present, domestic plastic gears are mainly used to transmit motion, and the United States is now in the transmission of power on the choice, but also more and more plastic gears. This is because plastic gear has many advantages, such as low transmission noise, vibration absorption, self-lubrication and so on, and plastic gear can be molded processing, high production efficiency. Plastic gear in the gear industry will be more and more applications, this is a worldwide trend. According to luo Baihui, secretary general of international Mold Association, the application scope of domestic oil pump castings can be roughly divided into three aspects: plastic gear mold, powder metallurgy gear mold and precision forging bevel gear mold. Among them, the demand for plastic gear mold is relatively large. At present, middle and low grade oil pump castings can be produced in China, and high-grade oil pump castings rely on imports. There are not many domestic factories specializing in oil pump castings. Most of them are made of oil pump castings by gear factories. Gear factories often set up a section or a workshop to undertake this work. In the aspect of precision forging bevel gears, the castings of taper oil pump made by Zhutooth, Jiangsu Spacecraft and Pacific precision forging are better in the oil pump casting industry, and the quality of precision forging bevel gears is also higher. In terms of plastic gear, generally speaking, plastic gear and its moulds are mainly distributed in two regions. One is Ningbo, Zhejiang, where there are more than 340 plastic gear factories, and it is also the largest production base of plastic oil pump casting in China. The other is Shenzhen Baoan, mainly with Hong Kong enterprises, high precision products, mainly used for export.
