Created on 05.20
Common Causes and Solutions for Air Shaft Leakage
Air shafts are widely used in slitting, rewinding, and unwinding machines. They secure the core through air expansion and play an important role in stable winding performance.
However, air leakage is a very common problem in actual production. Once leakage occurs, it can cause core slipping, unstable tension, and reduced production efficiency.
Identifying the cause and solving the problem quickly is very important.
Common Symptoms of Air Shaft Leakage
- air pressure drops quickly after inflation
- the core cannot be locked tightly
- slipping during rewinding
- continuous leakage from the air valve
- frequent re-inflation required
Main Causes of Air Shaft Leakage
- Aging or Damaged Air Bladder
This is the most common issue.
After long-term use:
the bladder ages
cracks appear
local wear develops
This prevents the shaft from maintaining air pressure.
- Damaged Air Valve Seal
If the air valve has:
worn sealing rings
loose installation
damaged valve core
continuous air leakage may occur.
- Worn Lugs or Strips
Long-term friction can cause:
increased clearance
reduced sealing performance
Severe wear may affect the shaft expansion performance.
- Damaged Shaft Seals
Examples include:
aged O-rings
damaged sealing gaskets
These can cause internal air leakage.
- Excessive Air Pressure
Overinflation may:
accelerate bladder damage
deform sealing parts
This shortens air shaft life.
- Lack of Maintenance
Without regular cleaning:
dust enters the shaft
adhesive residue accumulates
This affects sealing and moving components.
Common Solutions
- Replace the Air Bladder
If the bladder is aged:
replace it promptly
avoid continued high-pressure use
- Replace Sealing Parts
Including:
O-rings
valve seals
valve cores
These are common wear parts.
- Control Air Pressure Properly
Avoid:
excessive inflation pressure
long-term high-pressure operation
Use recommended pressure settings.
- Perform Regular Maintenance
Recommendations:
clean regularly
inspect sealing parts
lubricate moving sections
This significantly extends service life.
- How to Reduce Leakage Problems
In production, it is recommended to:
use high-quality air shafts
avoid rough core loading and unloading
control air pressure properly
perform regular maintenance
Many leakage problems are caused by improper long-term use.
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