A deep drawing shop makes cups, shells and housings by pulling flat blanks through a draw ring with a punch. Pressure cooker bodies, LPG cylinder halves, filter cans and motor housings all start this way. Two people often work one press. The feeder places a blank on the blank holder; the remover lifts the drawn cup off the ejector. Their hands pass within reach of the tool hundreds of times a shift. Our page on deep drawing units names hand injury as the first strain, and for good reason.
Where the hand goes in
Guards, two-hand buttons and light curtains exist on most presses. Injuries still happen, and they rarely happen during normal feeding. They happen in the awkward moments a guard was never designed around. Ask any press shop supervisor; he can name them all.
- A blank lands skewed against the locating pins. The feeder nudges it straight with a finger instead of lifting it out with tongs or a suction cup.
- A cup sticks to the punch after a redraw. Someone flicks it free while the slide is still drifting.
- A foot pedal is used instead of the two-hand station. It is faster on a long run, and it leaves both hands free to wander.
- Drawing compound builds up on the die. A rag wipe mid-run is quicker than stopping and inching the slide up.
- The second press hand is absent. One person feeds and removes alone, crossing the danger zone twice per stroke.
Why careful people still take the shortcut
Nobody wants to lose a fingertip. The shortcut wins because the shop rewards it, often without meaning to. A bonus counted in strokes per shift pays the feeder who never stops the press. A supervisor judged on shift output looks away when the pedal comes out. A new hand copies the senior beside him, and the senior learned to reach in years ago. Then there is blame. When a wrinkle or split appears, the operator is scolded first, so he fixes the blank himself rather than call for help.
Fatigue adds to all of it. Long runs of a single part dull attention by the last hours. A pressure cooker order with a dispatch date tomorrow pushes pace higher just when hands are slowest. Repetition plus hurry is where most serious press injuries begin, and both are set by how work is planned and paid.
What an injury costs the unit
The human cost comes first and lasts longest. A crushed finger can end a press career, and the injured man's family feels it for years. The shop feels it too. The press stands while the incident is looked into. The remaining crew slows down, frightened. Good feeders ask to move to the trimming or polishing section. Word travels to the villages your helpers come from, and the next batch of recruits is harder to find. A single injury can undo years of trust built with a crew.
People routines that keep hands out of the tool
- 1
Sign off each person per press and per mode
Single-stroke under two-hand control first. Continuous mode and pedal use come later, once a senior setter has watched a full run and signed. Keep the list at the press and with the time office.
- 2
Give every new feeder a proper first week
No press for the first days. Blank handling, tongs and suction lifters, the stop button, how to report a misfeed. The onboarding routine for deep drawing hands sets out the sequence.
- 3
Pay the bonus on good cups, never on strokes
Count parts that pass the wrinkle, split and scratch check at the inspection table. A stroke counter rewards the very hurry that hurts people.
- 4
Never let one person feed and remove alone
If the second hand is absent, slow the press to single-stroke or move it to a job with a shuttle feed. Write that rule down so the supervisor does not have to argue it each time.
- 5
Swap stations on a clock during long runs
Feeder, remover and trimming station swap on a fixed clock. Attention resets with the change of task.
- 6
Make misfeeds and near misses cheap to report
A short slip at the press, collected each shift, with no penalty for the person who reports. Our press-side near-miss slip gives a starting layout.
Stop pinning defects on the operator
Splits have many parents. An oversize blank, a dry patch of drawing oil, a scored draw radius or excess blank holder pressure can each tear a cup. Only one of those is the operator's doing. Keep a short defect sheet at each press that lists blank, oil, die and press settings beside the operator column. Review it with the crew weekly. When feeders see the cause traced fairly, they stop fixing problems with their fingers and start calling the setter. The performance page for deep drawing units explains how to fold that sheet into reviews.
The supervisor is the guard that matters most
A light curtain cannot see a pedal hidden under a bench. The press shop supervisor can. Judge supervisors on injuries and misfeeds as well as output, and say openly that halting a press over a skewed blank earns credit, not a mark. Open each shift with a short huddle at the press line about one named risk. Rotate the topic: pedal use one day, stuck cups the next, rag wiping after that. The fuller routine sits on our deep drawing safety page.
A first check for this week
Stand beside the draw presses through the closing stretch of a night shift. Note which presses run on the pedal, who is feeding and removing alone, and how the bonus is counted. Then compare that list with who is actually signed off on each press. Whatever separates those two lists is your injury exposure. For neighbouring trades such as hot forging and roll forming, see the metal forming HR overview.
