Rapid development of plastic mold making technology has become an important part of modern manufacturing technology. Such as mold CAD/CAM technology, laser rapid prototyping technology of molds, precision forming technology of molds, ultra-precision machining technology of molds, and dynamics of flow, cooling and heat transfer processes using finite element method and boundary element method in mold design. Simulation technology, CIMS technology for molds, and DTM technology and numerical control technology have been developed, covering almost all modern manufacturing technologies. Modern mold manufacturing technology is moving in the direction of accelerating information drive, improving manufacturing flexibility, agile manufacturing, and systematic integration. First, high-speed milling: the third generation of mold making technology High-speed milling not only has a high processing speed and good machining accuracy and surface quality, but also has a low temperature rise (only 3°C increase in the workpiece) and a small thermal distortion compared to conventional cutting, and is therefore suitable for temperature and thermal deformation. Sensitive materials (such as magnesium alloy) processing; also due to the small cutting force, can be applied to the processing of thin-walled and rigid parts; reasonable selection of cutting tools and cutting amounts, can achieve a series of advantages of hard materials (HRC60) processing. Therefore, high-speed milling machining technology is still a hot topic at present. It has developed to a higher degree of agility, intelligence, and integration, and has become the third generation of mold making technology. Second, EDM milling and "green" product technology From the point of view of foreign electric machine tools, the performance, process indicators, intelligence, and automation have reached a very high level. The new trend in foreign countries is the EDM milling technology (electric spark forming technology). The research and development, which is a new technology that replaces the traditional method of forming cavities with a shaped electrode, uses a simple tubular electrode that rotates at a high speed for 3D or 2D contour machining (like CNC milling), so it is no longer necessary to manufacture. Complex forming electrodes, which is clearly a major development in the field of EDM forming. Recently, Mitsubishi Corporation of Japan has made new progress in the development of the EDSCAN8E EDM machine tool. This machine can automatically compensate for electrode loss, and it is a special CAM system developed for this machine on Windows 95. It can be linked with general-purpose CAD such as AutoCAD, and can perform on-line precision measurement to ensure high-precision machining. In order to confirm whether the processing shape is abnormal or incomplete, the CAM system can also perform simulation processing. At the same time as the progress of EDM technology, the safety and protection technology of EDM has attracted more and more attention. Many electric machine tools have considered safety protection technology. At present, the European Community has stipulated that machine tools without the "CE" mark cannot enter the European Community market. At the same time, the international market places more and more emphasis on the requirements of safety protection technology. At present, the main problem of EDM machine tools is radiation harassment because it has a greater impact on safety and environmental protection. As the international market places more and more emphasis on "green" products, it is the leading equipment for die-slotting machining of EDM machines." "Green" product technology will be a problem that must be solved in the future. Third, a new generation of mold CAD/CAM software technology At present, the mold software developed by Britain, the United States, Germany and other countries and universities and research institutes in China has the characteristics of intelligent, integrated, and mold manufacturability evaluation of the new generation mold CAD/CAM software. The new generation of mold software should be based on a large amount of knowledge summarized from the mold design practice. This knowledge has been systematically and scientifically organized, stored in a specific form in the engineering knowledge base and can be conveniently called by the mold. Under the support of intelligent software, mold CAD is no longer an imitation of traditional design and calculation methods, but under the guidance of advanced design theory, full use of the rich knowledge and successful experience of experts in the field, its design results must be reasonable Sex and advanced nature. The new generation of mold software designs the mold structure with three-dimensional thoughts and intuitive feelings. The generated three-dimensional structure information can be conveniently used for mold manufacturability evaluation and numerical control processing. This requires the mold software to be modeled and shaped in three-dimensional parametric features. Process simulation, numerical control process simulation and information exchange, and organization and management have reached a fairly complete level and have a higher level of integration. Measure the level of software integration, not only depends on whether the functional modules are complete, but also depends on whether these functional modules share the same data model, whether to form a unified global dynamic database, to achieve comprehensive management and sharing of information to support the mold design The whole process of manufacturing, assembly, inspection, testing and production. The function of moldability evaluation in the new generation of mold software is very important. It is necessary to screen multiple projects, evaluate the rationality and economy of the mold design process, and provide the mold designer with the basis for modification. In the new generation of mold software, the manufacturability evaluation mainly includes mold design and manufacturing cost estimation, mold assembly evaluation, mold part manufacturing process evaluation, mold structure and forming performance evaluation.新一代 New generation software should also have assembly-oriented functions, because the function of the mold can only be reflected through its assembly structure. After adopting the assembly-oriented design method, mold assembly is no longer a simple assembly of parts one by one. Its data structure can not only describe the function of the mold, but also define the assembly characteristics of the relationship between mold parts and components, and realize the correlation of parts. Can effectively guarantee the quality of the mold. Fourth, advanced rapid mold manufacturing technology 1. Rapid development of laser rapid prototyping (RPM) technology. China has reached the international level and gradually realizes commercialization. The rapid prototyping processes that have been commercialized in the world mainly include SLA (stereolithography), LOM (layered separation manufacturing), SLS (selective laser sintering), and 3D-P (three-dimensional printing). Tsinghua University first introduced the SLA250 (stereolithography or photosensitive resin laser-curing) equipment and technology of the US 3D company and conducted research and development. After several years of hard work, it has improved several times, improved and introduced "M-RPMS-type Functional rapid prototyping manufacturing system" (has layered solid manufacturing - SSM, melt extrusion molding - MEM), which is the only system in the world that has two kinds of rapid prototyping processes (national patents) and has good performance. Price ratio. 2. Dieless multi-point forming technology is another advanced manufacturing technology for sheet metal forming by replacing the traditional die with a height-adjustable punch group. The CAD/CAM/CAT technology is the main method for the dieless multi-point forming system. Realize the automatic shaping of three-dimensional surfaces. Jilin Gongda undertook the national key scientific and technological projects related to moldless molding, and has independently designed and manufactured a multi-mode multi-point forming equipment with international advanced level. Compared with the Massachusetts Institute of Technology in the United States, the University of Tokyo in Japan, and the Tokyo Institute of Technology in Japan, this technology in our country is in a leading position both in theoretical research and practical application, and is currently advancing toward the promotion and application.  3, resin stamping dies for the first time in the trial production of domestic cars have been successfully applied. FAW Mould Manufacturing Co., Ltd. designed and manufactured 12 sets of resin molds for the modified trial production of the new Little Red Flag sedan. The 12 sets of molds are drawing molds for large-scale complex internal and external covers such as trunks, hoods, front and rear left and right fenders, etc. The main feature is that the mold surface is based on the CAD/CAM main model, the high-strength resin cast by Swiss Ciba is used for the injection molding, the gap between the convex and concave molds is accurately controlled by imported wax chips, and the dimensional accuracy of the mold is high. The cycle can be shortened by one-half to two-thirds, and manufacturing costs can be reduced by about 10 million yuan (12 sets of molds). It has opened up a new way for the trial production and small batch production of cars in China, which is a domestic initiative. Experts of Ciba refinement in Switzerland believe that it can reach the international level in the 1990s. Fifth, on-site mold testing technology With the development of precision molds, the requirements for measurement have become higher and higher. Precision coordinate measuring machines have long been limited by the environment and are rarely used at production sites. The new generation of three-coordinate measuring machines basically have temperature compensation and use of anti-vibration materials to improve dust-proof measures, improve environmental adaptability and use reliability, make it easy to install in the workshop, in order to achieve the characteristics of the measurement site . Six, mirror polishing mold surface engineering technology The mold polishing technology is an important part of the mold surface engineering and is an important post-processing process in the mold manufacturing process. At present, domestic polishing equipment to Ra0.05μm polishing equipment, abrasive abrasive and process, can basically meet the needs, but to Ra 0.025μm mirror polishing equipment, abrasive abrasive and technology is still at the stage of exploration. With the large-scale application of mirror injection molds in production, mold polishing technology has become a key issue in mold production. As there are still some problems in domestic polishing process technology and materials, there are still a large number of injection molds such as point-and-shoot camera lens injection molds, CD, VCD discs, and tools that require high transparency. It is worth noting that the polishing of the mold surface is not only affected by the polishing equipment and process technology, but also by the mirror surface of the mold material, which has not received enough attention, that is, the polishing itself is restricted by the mold material. For example, when 45# carbon steel is used as an injection mold, obvious defects are visible to the naked eye when polishing to Ra0.2μm. Continued throwing can only increase the brightness, and the roughness has no hope of improvement, so at present in the production of mirror molds Imported mold materials are often used, such as Sweden's Shengbai 136 and Japan's PD555. Mirror mold material is not only a matter of chemical composition, but more importantly, a series of advanced processes such as vacuum degasification, argon gas protection ingot casting, vertical continuous casting and rolling, and soft forging are required during smelting, so that there are fewer internal defects in the mirror surface mold steel. A series of advantages such as fine particle size, high degree of dispersion, fine metal grain size, and good uniformity can be achieved to meet the requirements of polished steel to mirror steel.
Ningbo Beilun Huari Metal Products Co., Ltd. is a manufacturer (ISO 9001:2008) of high pressure aluminum and Zinc Die Casting, located in Beilun Ningbo, China.
Here we offer complete die casting parts solutions and manufacture service from tooling to finished parts. Our expertise has been developed through years of working with product makers in local China and overseas. Parts made by Huari ranges from small to big, simple to complex.
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Plastic mold making is moving toward systematic integration