Squeeze casting technology came out before 1930s, and it was popularized in the Soviet Union from 1940s to 1950s. In the late 1960s, non-ferrous squeeze casting was applied and developed in Japan. In China, the development of squeeze casting technology is generally divided into four stages.
The 50-60’s of the 20th century is the stage of technological exploration. For example, Wuchang Shipyard cooperated with Huazhong University of science and technology in the extrusion casting of copper alloy, Dalian shipyard in the casting forging of high-pressure valve body combined process, and Hangzhou Qianyang oxygen machine factory, Shenyang Metallurgical Machinery College and other units carried out experimental research work.
From the late 1960s to the mid 1980s, it was the stage of production and application. For example, Guangdong instrument factory, Xi’an Instrument Factory and Weifang casting pot factory are the first batch of production units applying this technology in China. In the early 1970s, some institutions of higher learning and scientific research institutes such as Shanghai Jiaotong University, Wuhan University of technology, Harbin University of technology, May 2nd Research Institute and other units successively carried out the research on the production process, mold structure and squeeze casting materials of squeeze casting typical castings, laying a good foundation for the development of squeeze casting. In the middle and late 1970s, the technology of squeeze casting in China has been developed steadily, and it has made gratifying achievements in both the way of squeeze casting and the materials of squeeze casting.
After entering the 1980s, China’s squeeze casting technology has developed rapidly, especially the research and successful application of indirect squeeze casting, which has injected new vitality into the squeeze casting technology, It makes it possible to produce castings that can not be produced by squeeze casting in the past, such as castings with complex shape, large wall thickness, unsatisfactory performance by ordinary casting or castings that can not be produced by ordinary casting due to complex shape, and satisfactory castings can be obtained, expanding the application scope of squeeze casting. In addition, breakthroughs have been made in the research of ferrous metals, and extrusion castings such as steel flat flange developed and produced jointly by Harbin University of technology and Shandong Jimo casting and forging factory have also been successful.
From the mid-1980s to the mid-1990s, a large number of extrusion castings were successfully developed and put into production. For example, the aluminum wheel hub of motorcycle, the aluminum connecting rod of automobile air compressor and the cylinder body of automobile brake pump produced by squeeze casting. At the same time, “squeeze casting”, “steel liquid metal forging”, “liquid metal forging die design” and other monographs further promote and promote the development of squeeze casting technology.
In the late 1990s, squeeze casting was in a healthy and steady development stage. Because some enterprises don’t pay attention to technological innovation and market change, neglect product quality, and don’t choose suitable technology according to the specific structure of castings, some enterprises turn to production after putting into production, resulting in undue losses. On the contrary, the production enterprises that attach importance to technological innovation and have a good grasp of the technical characteristics have achieved rapid development and good economic and social benefits.
