1、 - 1 - The development of plastic mould Chinas industrial plastic moulds from the start to now, after more than half a century, there has been great development, mold levels have been greatly enhanced. Mould has been at large can produce 48-inch big-screen color TV Molded Case injection mold, 6.5 kg
2、 capacity washing machine full of plastic molds, as well as the overall car bumpers and dashboards, and other plastic mould precision plastic molds, the camera is capable of producing plastic mould , multi-cavity mold small modulus gear and molding mold. -Such as Tianjin and Yantai days Electrical C
3、o., Ltd Polaris IK Co. manufactured multi-cavity mold VCD and DVD gear, the gear production of such size precision plastic parts, coaxial, beating requirements have reached a similar foreign the level of product, but also the application of the latest gear design software to correct contraction as a
4、 result of the molding profile error to the standard involute requirements. Production can only 0.08 mm thickness of a two-cavity mold and the air Cup difficulty of plastic doors and windows out of high modulus, and so on. Model cavity injection molding manufacturing accuracy of 0.02 to 0.05 mm, sur
5、face roughness Ra0.2 m, mold quality, and significantly increase life expectancy, non-hardening steel mould life up to 10 30 million, hardening steel form up to 50 10 million times, shorten the delivery time than before, but still higher than abroad, and the gap between a specific data table. Proces
6、s, the multi-material plastic molding die, efficient multicolor injection mould, inserts exchange structure and core pulling Stripping the innovative design has also made great progress. Gas-assisted injection molding, the use of more mature technologies, such as Qingdao Hisense Co., - 2 - Ltd., Tia
7、njin factory communications and broadcasting companies, such as mold manufacturers succeeded in 29 34-inch TV thick-walled shell, as well as some parts on the use of gas-assisted mould technology Some manufacturers also use the C-MOLD gas-assisted software and achieved better results. Prescott, such
8、 as Shanghai, such as the new company will provide users with gas-assisted molding equipment and technology. Began promoting hot runner mold, and some plants use rate of more than 20 percent, the general heat-thermal hot runner, or device, a small number of units with the worlds advanced level of ri
9、gorous hot runner-needle device, a small number of units with World advanced level of rigorous needle-hot runner mould. However, the use of hot runner overall rate of less than 10%, with overseas compared to 50 80%, the gap larger. In the manufacturing technology, CAD / CAM / CAE technology on the l
10、evel of application of a new level to the enterprise for the production of household appliances representatives have introduced a considerable number of CAD / CAM systems, such as the United States EDS UG , the United States Parametric Technology Pro / Engineer, the United States CV CADS5 company, t
11、he British company DOCT5 Deltacam, HZSs CRADE Japan, the companys Cimatron Israel, the United States AC-C-Tech Mold Company and Australias MPA Mold flow Mold analysis software, and so on. These systems and the introduction of the software, although a lot of money spent, but in our country die indust
12、ry, and achieving a CAD / CAM integration, and to support CAE technology to forming processes such as molding and cooling, such as computer simulation, and achieved certain The technical and economic benefits, promote and facilitate Chinas CAD / CAM technology. - 3 - In recent years, Chinas own deve
13、lopment of the plastic mould CAD / CAM system has achieved significant development, the main guarantor Software Engineering Institute, is the development of CAXA, Huazhong University of Science HSC5.0 development of the system and injection mold CAE software, and so on, these Die of domestic softwar
14、e with the specific circumstances in the application of computer and lower prices, and other characteristics, in order to further universal CAD / CAM technology has created good conditions. In recent years, China has been more extensive use of some new plastic mold steel, such as: P20, 3Cr2Mo, PMS,
15、SM , SM , and the quality of life of mold has a direct significant impact on the overall use of the still less . Plastic Moulds standard model planes, such as standard putter and spring has given more applications, and there have been some of the commercialization of domestic hot runner system compo
16、nents. However, at present China Die level of standardization and commercialization in the general level of below 30 percent and foreign advanced industrial countries has reached 70 percent compared to 80 percent, still a large gap. Table 1, at home and abroad plastic mould technology comparison tab
17、le? Domestic projects abroad cavity injection model mm0.02 accuracy of 0.005 0.01 0.05mm cavity surface roughness Ra0.01 0.05 mRa0.20 m non-hardened steel die life 10 to 60 million 10 30 million hardened steel die life 160 300 million of 50 100 million hot runner mould overall utilization rate of more than 80 per cent less than 10 per cent level of standardization of 70 80% less than 30% of medium-sized plastic mould production cycle about a month 2 4 months in the mold industry in the amount of 30 to 40% 25 to 30% According to the
