China's mold manufacturing technology has developed with the construction of modern industry. Before the 1950s, China's industrial base was very weak, and most industrial products could not be produced by themselves. Therefore, there were few molds required, and the mold industry and mold technology could not be mentioned. At that time, there were only a few molds that were needed in China, and only a few companies could imitate them. They mainly relied on mold fitters to make simple molds such as telephone handsets with personal skills.
After the 1950s, with the advent of the national economic construction, the number of molds required for the production of various industrial products increased. At that time, it mainly stayed in the process of processing with reference to foreign mold patterns, and mostly single-process molds, simple composite molds, progressive molds with few processes, and plastic compression molds with off-machine release. With the development of international economic and technological cooperation and exchanges, foreign mold technology books, mold design manuals, mold manufacturing materials, etc. have gradually introduced to China, which has played an important role in guiding and promoting the development of mold technology. Meanwhile, some of the manufacturing mold processing equipment, such as the introduction of large copy milling machine, coordinate boring machine and other equipment, to lay some foundation for the manufacture of large mold material. By 1956, the manufacturing mold began to adopt the forming grinding process, and the mold structure was formed by the block method to initially solve the problem of manual work and heat treatment deformation of the mold fitter. These have played an important role in improving mold quality and precision and shortening the manufacturing cycle.
Since 1959, EDM machines have been used in mold production, forming punches and electrodes by form grinding, machining of die by EDM, and unloading plate holes, so that there is another level of mold manufacturing technology. A big increase.
In 1963, the domestically developed EDM wire-cutting machine tool was able to process more complex and precise blanking die, which greatly reduced the manual work of the mold fitter and was used to machine the shape of plastic molds, die-casting molds and other forming molds. . The application and popularization of this technology is another important milestone in the development of China's mold manufacturing technology. Subsequently, due to the continuous improvement of mold manufacturing technology, the research of mold technology, the development of mold standardization and the development of new mold materials have been further developed. At this time, China's mold industry began to form, and some mold professional factories appeared.
In recent years, the rapid development of reform and opening up and the national economy has promoted the new development of mold technology and mold industry. The variety, precision and quantity of molds have been greatly developed, and the influence of molds on the production of industrial products is also growing. Molds have also attracted people's attention. Many research institutes and universities have achieved gratifying practical results in the basic theory of mold technology, mold design and structure, mold manufacturing and processing technology, mold materials and mold processing equipment. This period is the fastest and fastest period of mold technology development. Mold standardization work is an important symbol representing the development of the mold industry and mold technology. So far, more than 50 national standards, nearly 300 standard numbers, such as stamping die, plastic mold, die-casting die and mold basic technology have been formulated, which basically meet the needs of the development of domestic mold production technology. The degree of commercialization of molds has also increased significantly, from 20% during the “Eighth Five-Year Plan†period to around 30% today. Some advanced, precise and highly automated mold processing equipment, such as CNC copy milling machine, CNC machining center, precision coordinate grinding machine, continuous track CNC coordinate grinding machine, high precision low loss CNC EDM machine tool, slow wire precision EDM Wire cutting machine tools, precision electrolytic machining machines, three-coordinate measuring instruments, extrusion grinding machines and other precision and high-efficiency equipment for mold processing and testing, from the past to rely on import and gradually design and manufacture, so that the mold processing technology has reached a new level At the same time, it laid a material foundation for the promotion of advanced processing technology. In particular, the research and development of special processing techniques for mold forming surfaces have greatly improved the precision and surface roughness of mold processing. The improvement and improvement of special processing equipment has greatly improved the automation and efficiency of mold processing. The application of new mold materials, as well as the development and application of heat treatment technology and surface treatment technology, have greatly improved the life of the mold. The application of rapid prototyping technology in mold manufacturing is another major advancement in mold manufacturing technology since the 1980s. Rapid prototyping manufacturing technology is a brand new manufacturing process that combines mechanical engineering, CAD, numerical control technology, laser technology and materials science and technology. Rapid prototyping technology is applied to mold making, making mold design and manufacturing more rapid, economical and practical, and is of great significance for the production of multi-variety and small-volume products.
China's mold manufacturing technology level, from the past can only manufacture simple molds to the ability to manufacture large, precise, complex, long-life molds. For example, in the aspect of stamping die, we design and manufacture more than 50 stations for the hard-wired multi-station automatic graded alloy multi-station automatic progressive die of the motor stator and rotor silicon steel sheet hard residual station and the electronics and electrical industry. The cemented carbide multi-station automatic progressive die has reached the technical level of the international similar mold products. The die positioning accuracy of the die insert is <0.005mm, the step precision is <0.005mm, the surface roughness of the mold is Ra=0.4~0.1μm, the parts can be interchanged, and the die life is 100 million times. The combination of progressive cutting technology and stacking and riveting principle is used on high-speed punching machines, with automatic punching, lamination, riveting, twisting, counting grouping and safety protection. In the field of plastic molds, we can design and manufacture a large number of injection molds for automobile bumpers and integral instrument panels, large-scale color TV sets, washing machines and refrigerators. Yuteng, molds such as Tianjin Communication Broadcasting Co., Ltd. designed and manufactured the car rear bumper mold weighing more than 10 tons, the mold size accuracy of up to 10μm, cavity surface roughness Ra = 0.1μm, core surface roughness Ra =3.2μm, the mold life is more than 300,000 times, reaching the technical level of the international similar mold products.Hdmi Cables,Hdmi Cord,Micro Hdmi Cable,Extra Long Hdmi Cable
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