| 摘要 |
A method and apparatus for making plastic articles utilizing a plurality of tools (27, 28), each of which is moved by cams (29, 31) and includes a nitrogen cylinder (82) wherein provision is made for catastrophic overload prevention. For catastrophic overload prevention, one (84) of the cams is supplied by a top plate (80) and held in normal fixed position by a plurality of nitrogen cylinders (82). Abnormal movement of the top plate (80) is detected and the machine is stopped. For predictive overload protection, a load cell (L) is positioned at the off load position of one of the cams and any excessive load provides a signal for an alarm, interrupting the feeding of plastic charges and stopping the machine. <IMAGE> |
