Protection system for part molding machines
    6.
    发明授权
    Protection system for part molding machines 失效
    零件成型机保护系统

    公开(公告)号:US4285649A

    公开(公告)日:1981-08-25

    申请号:US95689

    申请日:1979-11-19

    IPC分类号: B29C45/76 B29F1/14 B29F1/00

    CPC分类号: B29C45/7626

    摘要: A protection system for monitoring the operation of a part molding machine which ejects the part from the molds after successful completion of the molding process. A plate is disposed beneath the mold for receiving the parts after they are ejected. A transducer mounted on the plate provides a spectrum of signals having different frequencies when the part impacts the plate. The amplitude of these signals at particular frequencies depend upon the part being made by the machine. A frequency generator is used to selectively provide a reference frequency signal associated with the particular part being made. A tone decoder compares the reference frequency signal with the signals from the transducer and provides an output signal if the amplitude of the transducer signals at the reference frequency exceeds a predetermined level. If the output signal from the tone decoder is not generated further operational cycles of the machine are prevented thereby protecting the mold from being damaged by a part which has not been fully ejected.

    摘要翻译: 一种保护系统,用于在成功完成模制过程之后监测从模具中喷出零件的零件成型机的操作。 在模具下面设置一个板,用于在它们被弹出之后接收零件。 安装在板上的传感器在部件撞击板时提供具有不同频率的信号频谱。 这些信号在特定频率处的振幅取决于机器所做的部分。 频率发生器用于选择性地提供与正在制造的特定部件相关联的参考频率信号。 音调解码器将参考频率信号与来自换能器的信号进行比较,并且如果参考频率处的换能器信号的振幅超过预定水平,则提供输出信号。 如果没有产生来自音调解码器的输出信号,则机器的进一步的操作循环被阻止,从而保护模具免受未完全弹出的部件的损坏。