Naturally, high-frequency welding (radio frequency) is not the only way to join together sheets of PVC and PU. So, why use HF rather than other techniques? During the welding process, the workpiece and the solder melt to form a molten zone, the molten pool cooling and solidification formed after the connection between the materials. In this process, it is usually necessary to apply pressure. Welding energy sources are many, including gas flame, arc, laser, electron beam, friction and ultrasound. Before the end of the 19th century, the only welding process is the blacksmith used for hundreds of years of metal forging welding. The earliest modern welding technology in the late 19th century, first arc welding and oxygen gas welding, resistance welding later appeared. The early 20th century, with the first and second world war, war, military equipment, reliable and reliable connection method needs great, it promoted the development of welding technology. Today, with the widespread use of welding robots in industrial applications, researchers are still digging deeper into the nature of welding and continue to develop new welding methods to further improve the quality of welding.
Physical essence
Welding is two or more than two or more kinds of the same or different materials through the combination of atoms and molecules between the diffusion and integration into the process.
The method of promoting the bonding and diffusion between atoms and molecules is heating or pressurization, or both heating and pressing.