1. Glue leakage at the Hot melt gluing nozzle 

If glue leaks from the nozzle during glue spraying, the possible reasons are as follows:

a. The temperature of the glue gun is not enough. The temperature of the hot melt glue gun should be increased appropriately.

b. If the pressure or flow rate of the air jet is too small, glue will drip from the nozzle. Increase the pressure of the air blowing pipe appropriately.

c. If the air passage in the nozzle is blocked, remove the nozzle module and clean it.

 

2. If glue leaks from the nozzle when the machine is not spraying glue, the possible reasons are as follows:

a. The thimble does not completely close the glue channel, and it is necessary to increase the pressure on the air channel of the solenoid valve of the glue gun.

b. The ejector pin is damaged and needs to be replaced.

c. The ejector pin and the outlet of the glue channel do not cooperate well. Adjust the fine-tuning bolt on the ejector pin to press down on the ejector pin and then loosen the bolt. Manually operate the solenoid valve on the glue gun several times.

 

3. The small hole in the middle of the needle valve leaks glue.

a. The sealing ring underneath the needle valve needs to be replaced.

 

 

 

Generally, after half a year or a year of use, the glue pipeline of the PUR hot melt adhesive machine needs to be cleaned and maintained.

 

What are the advantages of regular maintenance?

 

It can increase the fluidity of glue and improve the glue effect.

 

1. Ensure the quality of PUR hot melt adhesive

 

Clean pipes can prevent PUR hot melt adhesive from remaining, solidifying or deteriorating in the pipes, ensuring that the PUR hot melt adhesive is fresh every time it is used. This is particularly important for application scenarios that require high-precision bonding to ensure the stability of product quality.

 

2. Improve production efficiency

 

Pipe cleaning can avoid production interruptions due to blockages and reduce downtime. The smooth glue feeding process can ensure the continuous operation of the production line and improve production efficiency.

 

3. Extend equipment life

 

Residue in pipes can cause corrosion or wear on the inner walls of pipes, and regular cleaning can reduce this damage. Well-maintained equipment generally has a longer service life, reducing equipment replacement costs.

 

4. Reduce failure rate and maintenance costs

 

Duct cleaning can reduce equipment downtime caused by blockages, leaks, and other failures. Reducing failure rates can reduce maintenance costs and improve equipment utilization.

 

5. Reduce security risks

 

Residue or blockage in pipes can cause equipment overheating, leakage, and other safety hazards. Through regular cleaning, these risks can be reduced and production safety ensured.