Most facilities are located in parts of the US impacted by the cold weather months. As the weather gets colder, so does the interior of the factories where most packaging lines operate. It seems like common sense that as the environment around your hot melt system gets colder, so will your hot glue unless you increase the temperature. Below are a few key factors to realizing you need to up your temperature.
Hot Melt Consistency
Hot melt consistency is the number one problem in most high-speed packaging lines during the winter months. This includes not only the consistency of the glue within the heated reservoir, but also the consistency of the glue to stay at temperature as it travels down that line. Just because your glue looks viscous inside the pot, doesn’t mean it is holding the same viscosity throughout the travel process. If your glue looks stringy or your guns are not firing consistently, then you most likely have a glue temperature problem. Try increasing the temperature of the tank, hoses and guns by 15 degrees. Please note that your hoses and guns should already be set 15 degrees higher than your tank. A minor adjustment like this will not char your glue, but should help keep it consistently viscous throughout the travel process.
Locate Cold Joints
Another important task would be to inspect your system setup for any cold joints. A cold joint would be any unnecessary extensions that you have added throughout the adhesive application process. Most cold joints are found on older machines that use larger sized extensions and filter housings. The more cold joints on the system, the more inconsistent the glue will heat and stay heated throughout the entire application process. If you cannot eliminate cold joints, increasing the temperature settings of the tank, hoses and guns will be helpful.
Location of your Line
One of the most important things to look at is where your packaging line is located within your facility. Most melters are located at the end of the line, which leaves them close to an exterior wall, door or window. The cold temperature outside could be impacting, not only the viscosity of your glue, but the heating time of your glue and its adhesion ability. Every time your line operator opens the fill door on the hot melt tank, the external air hits the existing glue and cools it off. Even if the lid on your tank is only open for a few minutes, that could impact not only the current glue in the tank reservoir, but the glue you are adding to the tank. If your glue pellets are colder than normal, it will take a longer amount of time to heat them. Since you cannot move the line, increasing the set temperature of your tank, hoses and guns will help eliminate glue inconsistency during the winter months.
If you have any questions about how to reduce the impact of winter weather on your hot melt system, please reach out to a technical rep at email@example.com.