High frequency welding machine uses a mature technology that has been around since the 1940s. Two pieces of material are placed on a table press that applies pressure to both surface areas. Dies are used to direct the welding process. When the press comes together, high frequency waves are passed through the small area between the die and the table where the weld takes place.
High frequency welding machine is used in a variety of industries where a strong consistent leak-proof seal is required. Therefore PVC and PU are the most common thermoplastics to be welded with HF. It is also possible to weld other polymers such as nylon, PET, EVA and some ABS plastics.