Development history of injection mold design


The development history of injection molds is a history […]

The development history of injection molds is a history of mutual promotion, interdependence and common development of injection mold design and manufacturing. The rise and application of injection mold technology is firstly due to the development of technology and general systems, and also due to the development of injection mold theory and Injection mold design and manufacturing itself have inherent requirements for the urgent application of technology. With the upgrading of computers, the rapid development of computer graphics and computer technology, from the 1960s to the 1970s, the rapid development of technology. 20th century In the mid-1960s, many large companies and universities in the United States and the United Kingdom invested a lot of manpower and material resources to research and develop technology and developed many practical systems. At the same time, scholars from countries such as the United Kingdom, the United States, and Canada The basic research on the flow and cooling of plastic melt in the mold cavity establishes a one-dimensional flow mathematical model of the solution, which lays a foundation for the systematic study of injection mold.
    Since 1972, the research team led by Professor of Chemical Engineering of Canada has carried out systematic research on computer simulation, process control and plastic performance testing of injection molding process. Based on this, a computer simulation integrated system for injection molding process has been established. The injection molding research group has conducted in-depth research on injection molding technology since 1974. It has established one-, two-, and three-dimensional mathematical models for flow, pressure, and cooling in the injection molding process, and developed the rheological properties and heat of plastic melt. The experimental study of performance has created a mathematical model of flow path balance calculation. After more than 20 years of research and development, computer aided technology for injection mold design has entered a practical stage. At present, the most popular software systems for injection mold design on the market are mainly Have:
    1 Australian company's 1 system.
    It is also the first injection mold flow analysis software introduced in the 1970s. It has flow analysis, cooling analysis, warpage analysis, shrinkage analysis, structural stress analysis, injection molding machine parameter optimization, gas-assisted injection molding analysis, plastic fiber orientation analysis, and medium-sized surface. Automatic generation, thermoset plastic flow and fusion analysis.
    2 American Dinghan company's system.
    3 US company's 4 US company's system.
    It is also a general-purpose system with a strong parametric feature modeling function. It also includes a dedicated mold design module to make the mold design more convenient and intuitive.
    5 US 30-foot company system.
    It is a general mechanical system, which uses the main model parameterization method to design the 3D product model and adopts the technology for the first time. In addition, its finite element analysis and processing are powerful.