| 摘要 |
The invention relates to a device and method for automatically monitoring repetitive operational sequences on injection molding machines and/or on handling units to injection molding machines, and for identifying abnormalities or disruptions with regard to the operational sequence. During normal production operation, the repetitive operational sequence of at least one partial process is provided, and a measurable quantity (1), which is influenced by the partial process, regarding the operational sequence monitoring is automatically recorded in short sampling intervals (2). The sampled values are compared with limit values (6) that were formed, by using an algorithm, from a multitude of previous sampled values of the same operational sequence. The sensitivity is automatically adapted to the process variations with regard to a decision to alert or terminate. This novel solution permits the carrying out of monitoring with the highest possible sensitivity, however, without a negative response, e.g. repetitive traveling motion, but also for operational sequences without moving parts such as the d.c. link voltage in converters or during controlled processes for monitoring a quantity that is not controlled. |
