Our experts have also shared essential methods and steps for hot melt adhesive machine system cleaning. This technical knowledge is crucial for improving production efficiency in the adhesive - using industries.

  UNISN's experts have put together a comprehensive guide for hot melt adhesive machine system cleaning. This guide is designed to help adhesive - using industries improve their production efficiency.

  When it comes to glue box cleaning, the first step is to set the glue box temperature. After that, we need to focus on nozzle cleaning and filter cleaning.‍

1. Set the glue box temperature to 150-160℃ (appropriately according to the melting setting of the hot melt adhesive), unload the pressure of the glue pump, disassemble the hose and glue gun, empty the residual glue in the glue box of the hot melt adhesive machine, empty the residual glue in the glue box, and remove the filter in the glue box and the filter near the glue outlet. If the glue machine has just started to heat up, you can directly remove all the residual glue that has not been completely melted from the glue box. (Note that you should wear high temperature gloves when operating)

2. Soak and clean the glue box with a special cleaning agent for hot melt adhesive. Put about 1/2 of the glue box capacity of hot melt adhesive cleaning agent R solvent, set the glue box temperature to 130℃, put the filter, filter screen and nozzle of the glue box into the cleaning agent, soak for about 30 minutes, then wipe the four walls and bottom of the glue box with cotton cloth, remove the carbonized matter attached to the wall of the heating box, and then drain the cleaning agent from the glue box discharge port. If necessary, put about 1/3 of the glue box capacity of R solvent, and repeat the above operation. Then use a soft cloth to completely clean the carbonized matter or impurities in the glue box. (Do not use gasoline or thinner for cleaning)       

3. Clean the nozzle, spray head, spray gun, adapter, and filter. Use high-pressure airflow or manually to remove the softened impurities inside, and wipe them clean with cotton cloth. During the cleaning process, check the appearance of the filter. If it is damaged, replace it with a new one.        

4. After cleaning the glue machine, test the machine. After completing the above steps, connect the glue machine system. Add hot melt glue, set the operating temperature of the glue box/hose/nozzle according to the equipment manual, and start production after the hot melt glue melts. During the actual production process, please carefully observe the shape of the hot melt glue sprayed from the nozzle.

Notes:

1. Safety precautions are crucial during hot melt adhesive machine system cleaning. For example, always wear protective glasses and heat - resistant gloves.

2. Make sure the hot melt glue machine is thoroughly cleaned, otherwise the residual carbonized matter will enter the nozzle and clog it again.

3. Please strictly follow the recommended temperature in the instructions on the hot melt glue machine for the actual use temperature.

4. If the production line is temporarily shut down for more than 2 hours, please lower the glue tank temperature to about 130℃.

5. It is forbidden to mix hot melt glues of different brands.

6. During the production process, please close the glue tank cover and keep the site clean. (All sources of fire are strictly prohibited)