Mechanical safety device for an injection molding machine
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United States of America Patent
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-
Jun 5, 2012
Grant Date -
Jun 23, 2011
app pub date -
Aug 27, 2010
filing date -
Dec 21, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A mechanical safety device for an injection molding machine is provided with a laterally openable safety door on the flank of a mold opening/closing portion between a movable platen and a stationary platen. A rod is secured to the stationary platen or a base, and a rail, which ascends and descends as the safety door is closed and opened, is assembled to the rod. The rod is formed with a plurality of engaging step portions and tapered surfaces arranged alternately. On the other hand, a ratchet is rotatably supported on the movable platen. The rail ascends or descends to push up or down the ratchet, thereby locating the ratchet in a position where it engages with the engaging step portions of the rod or a position where it is disengaged from the engaging step portions.
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