Strapping Machine Won't Seal the Strap

 

In the world of packaging machinery, the strapping machine plays a crucial role in securing products and cartons.  However, one common issue faced by operators and manufacturers is why a strap machine sometimes fails to seal properly. This problem can lead to production delays, increased waste, and damaged product.

The main reasons why a strapping machine will not seal properly is a worn out or dirty heat sealing element.

Many strapping machines use heat sealing to bond strap ends, and the heating element can wear out or become dirty over time. A damaged sealing element won't generate sufficient heat for a proper seal.

Maintenance Advice: Switch machine off and after 5 minutes get access to a cool heater blade and inspect for buildup of melted strap residue. Remove and clean if identified.

- Regularly clean heating plates and components.

- Replace worn or damaged heating elements immediately.

With blade cool, check alignment of the heater blade on its mounting bracket. The blade may have been bent, or the mounting bracket misaligned and the blade does not slide between top and bottom straps horizontally.

Check that the reciprocating arm that holds the heater blade assembly moves forwards and backwards at approximately the same speed. Forward movement of this arm is generally governed by a cam, and it's return by a spring. Slow or no return indicates a spring has broken. No forward movement may require service tech attention.