目前,我国印刷行业普遍使用上海人民机器厂生产的JLS型胶印轮转印刷机,经声污染调查统计,当印刷时速达每小时两万张时,该机噪声波动范围为93～95分贝。噪声来自折页装置各部件在运行过程中的撞击,其中以裁纸刀和折页刀的撞击声最为突出。因此,我们的降噪工作主要从控制裁纸刀和 Currently, the printing industry in our country generally uses the JLS type offset printing press produced by Shanghai People’s Machine Factory. According to the investigation of acoustic pollution, when the printing speed reaches 20,000 per hour, the noise fluctuation range of this machine is 93-95 dB. Noise comes from the impact of various components of the folding device during operation, among which the impact sound from the paper cutter and the folding knife is the most prominent. Therefore, our noise reduction work mainly from the control of knife and knife