Welding method in plastic

How to glue plasticadhesive, there is also a welding method.

Welding can be divided into external heating using a heating tool (hot plate) or frictional heat (vibration friction) and internal heating using ultrasonic waves (sound waves) or high frequencies (radio waves). Table 1 shows the welding properties of each of these plastics.

Table 1 Welding properties of various plastics

①Ultrasonic welding

15 kHz to 30 kHz longitudinal vibration generates stress strain inside the plastic itself

Due to the impact effect on the surface to be joined by heating or passing sound waves through the plastic

　It is a method of melting by stress heating and then cooling and solidifying.

②Vibration welding

　Pressure is applied to the contact surface of the two fixed plastic parts, and the frequency is 100 Hz to 400 Hz

　The frictional heat generated when the part is reciprocated in the longitudinal direction or part of an arc with an amplitude of 2 to 4 mm

　This is a method of using and welding.

③High frequency welding

This is a method of welding by generating induction loss heat using radio waves of 13MHz to 80MHz.