How To Solve The Problem Of Inconsistent Bottom Seal Sizes in Bag Making Machines?

Jul 17, 2026

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Reasons for Inconsistent Bottom Seal Size in Bag Making Machines

There are several possible reasons for inconsistent bottom seal size in bag making machines. The following are common causes:

Inaccurate Cutter Position: When the cutter position is too high or too low, the cut will be too shallow or too deep during bottom sealing, resulting in inconsistent bottom seal size.

Worn Cutter or Excessive Aluminum Dross Accumulation: Worn cutters or excessive aluminum dross accumulation can cause cut deformation, affecting bottom seal quality.

Old or Incompatible Sealing Rollers: Old or unsuitable sealing rollers can affect sealing quality and lead to inconsistent bottom seal size.

Inaccurate Sealing Temperature: Incorrect sealing temperature can cause poor bottom seal processing or inconsistent sizes.

 

Solutions
Depending on the cause, there are several solutions to the problem of inconsistent bottom seal size in bag making machines:

Adjust Cutter Position: After the machine stops, manually rotate the cutter to find the accurate cut position and adjust the cutter to the correct position.

Replace the Cutter: If the cutter is worn or has accumulated too much aluminum dross, it needs to be replaced to ensure cut quality.

Replace the sealing roller. If the sealing roller is too old or incompatible, it needs to be replaced to ensure sealing quality.

Adjust the sealing temperature. Adjust the sealing temperature according to the different bag materials to ensure consistent bottom seal size.

The above are solutions for inconsistent bottom seal sizes in bag making machines. In actual operation, we also need to pay attention to cleaning the machine, changing materials, and maintaining the machine.

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