无箱射压造型以其组线简单、投资少、占地小且具有自动化程度高、生产效率高、操作方便、噪音低的效果,因而被国内外铸造工作者公认为批量生产中小型铸件的工艺发展方向。七十年代初,我国开始这一先进工艺的试验、研究、推广工作,到目前为止,单列出型和双列出型两种类型的垂直分型无箱射压造型线,已较稳定地应用于简单小铸件的批量生产;但用于生产有型芯的较复杂铸件的水平分型无箱射压造型机,虽已 Boxless injection molding with its simple line, less investment, small footprint and has a high degree of automation, production efficiency, ease of operation, low noise effect, which is domestic and foreign foundry workers mass production of small and medium-sized castings Process development direction. In the early seventies, China started the experiment, research and popularization work of this advanced technology. So far, the two types of vertical sub-type boxless injection molding lines of single type and double type have been relatively stable Used in simple mass production of small castings; but for the production of cores with more complex castings horizontal type shotless molding machine, although