Injection molding is a complicated process, and the final part quality depends on many machine and process parameters settings. To increase controllability of the injection molding process, acquisition of the process data is necessary. This paper describes the architecture and development of a prototype of an open application programming interface (API) for injection molding machines (IMMs), which has the potential to be used with different IMMs to log and set the necessary process parameter values. At the moment, the API includes an implementation of EMI data exchange protocol and can be used with ENGEL IMMs with CC300 and RC300 controllers. Data collection of up to 97 machine and process parameters (the number might vary depending on the type of machine at hand), obtained from sensors installed in the machine by the manufacturer is allowed. The API also includes a module for the acquisition of data from additional 3d party sensors. Industrial Raspberry Pi (RevPi) was used to perform analog-to-digital signal conversion and make sensors data accessible via the API prototype. The logging of parameters from the machine and from sensors is synchronized and the sampling frequency can be adjusted if necessary. The system can provide soft real-time communication.

中文翻译：

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迈向注塑机的通用应用程序编程接口（API）

注塑成型是一个复杂的过程，最终零件的质量取决于许多机器和过程参数的设置。为了提高注塑过程的可控性，必须获取过程数据。本文介绍了用于注塑机（IMM）的开放应用程序编程接口（API）原型的体系结构和开发，该程序有可能与不同的IMM一起使用，以记录和设置必要的过程参数值。目前，该API包括EMI数据交换协议的实现，并且可以与带有CC300和RC300控制器的ENGEL IMM一起使用。允许从制造商从机器上安装的传感器中收集多达97个机器和过程参数的数据（此数目可能会随手头机器的类型而异）。该API还包括一个用于从其他3d参与者传感器获取数据的模块。工业Raspberry Pi（RevPi）用于执行模数信号转换，并使传感器数据可通过API原型访问。来自机器和传感器的参数记录同步，如有必要，可以调整采样频率。该系统可以提供软实时通信。