What are the Principals of Heat Sealing for Hot Wedge Machines?

Heat sealing is the correct combination of heat applied by a wedge, speed, and pressure will allow you to achieve a properly welded seam.

Heat

The Hot Wedge heat system uses heating elements to electrically heat the Wedge. The Hot Wedge temperature ranges from 25 to 450 Degrees Celsius (100 to 842 Degrees Fahrenheit). Depending on your material, the temperature needed will vary.  The best way to find the required temperature, Miller Weldmaster suggests testing samples.  

Note: Be sure to clean off the wedge regularly to ensure complete and even heat across the entire wedge.

Speed

The Speed of the Weld Rollers determines the time the heat is applied to the material being welded. The slower the speed setting, the more the material will be heated. The faster the speed setting, the less the material will be heated. To achieve the best weld, a minimal amount of heat should be applied to the material while still achieving a full weld. Too much heat will cause distortion of the material; while not enough heat will prevent the material from welding.  Desired speed may vary based on the material and application.  

Pressure

The pressure applied by the weld roller is the final step when creating a weld. The pressure of the weld roller compresses the heated material together completing the welding process.

Note: Having clean weld rollers ensures that the seam will be smooth.  Dirty or worn-out rollers may cause wrinkly or bad seams.