On a wide-width FIBC cutting line, the two biggest hidden costs are not the cutting itself — they are handling the heavy roll and changing over to the next bag size. Both consume labour and time that never appear in the machine's rated output, so reducing them is one of the most effective ways to raise real productivity.

Where the Time Actually Goes

• Manually carrying the fabric roll to the machine.
• Re-centring the roll after loading.
• Changing the cutting length for the new size.
• Adjusting the opening (spout-hole) position.
• Switching between cold and hot cutting modes.
• Repeatedly measuring the first piece until it passes.

How Equipment Configuration Helps

Standard Changeover Steps

1. Check the new bag-type development drawing.
2. Clear the previous order's parameters.
3. Check the fabric roll width and diameter.
4. Set the length and the opening size.
5. Complete the first-piece trial cut.
6. Measure the first piece; only start mass production after it passes.

Changeover Record

Why It Adds Up

Individually, each of these steps looks small. Together they define how much of a shift is spent producing and how much is spent preparing. Removing the manual roll lift shortens the loading step and cuts the safety risk; a stored length setting removes the trial-and-error of re-programming; quick handling of the opening size removes another stop. Because the parameters are known and recorded, the next changeover should be faster than the last, and the first-piece result should be predictable rather than a surprise.

The Changeover Record Matters

Keeping a row for every order links the base fabric width, cut length, cold/hot mode, opening size and first-piece result to the operator who ran it. When a batch later shows a size problem, the record shows exactly which settings produced it, and the same settings can be corrected for the next run instead of being repeated. The record also makes the improvement visible: over a series of orders, the number of first-piece failures and the time spent on each changeover can be compared honestly, without inventing a percentage that the equipment does not support.

Parameter Notes

The 15–18 pieces per minute figure corresponds only to a cutting length of L = 1000 mm; it is not a universal speed for every bag size. The 1350 mm and 2200 mm widths correspond to different width models, so they should not be quoted for the same machine. Automatic flap joining is an optional module on the CBJ-2200. No changeover-time reduction percentage should be assumed, because the real saving depends on the specific bag type, operators and organisation at each plant.