Ask a press operator about the risk and they will describe it precisely: the part that sticks, the reach-in to free it, the cycle that must never start while a hand is inside. Then ask how many times they have done that reach-in. The honest answer is thousands. Every one of them was fine — which is exactly what makes the pattern dangerous. Routine erodes caution faster than any hazard sign can rebuild it.

Two-hand controls and guards do real work here, and nothing should replace them. But they govern how a cycle is started — they do not continuously verify that the working area is clear of people throughout the process. That gap between "the cycle was started correctly" and "nobody is inside right now" is where the incidents live.

Watching the zone, not the button

  • Monitor the press zone continuously from outside the hot process area, so no electronics sit in the heat.
  • Block the cycle while a person is present in the working area — regardless of how the cycle was initiated.
  • Release only when the monitored zone is verifiably clear.
  • On camera fault, power loss, or obstruction: block the press. The failure mode is a stopped machine, not an unprotected one.
  • Integrate through a dry-contact interface the existing PLC already understands.

The integration point matters for adoption. A safety layer that demands re-engineering the press control system will be postponed indefinitely; one that lands on a dry-contact interface can be commissioned without redesigning what already works — and it is rated for three-shift continuous operation, because presses do not keep office hours.

The economics of the near-miss

Press incidents are severe enough that most plants treat prevention as priceless — after the incident. Before it, the same investment competes with every other budget line. Continuous zone monitoring shifts that argument: every blocked cycle is a logged event, so the system documents the near-misses that today evaporate into shift-change anecdotes. A press that blocked forty cycles last quarter because someone was still inside is not a hypothetical risk. It is a record.

Press Guardian productizes this discipline for molding and press operations. If your press shop still depends on the assumption that the routine reach-in will always be timed correctly, show us the line — the assessment starts at the press with the stickiest parts.