High Frequency PVC Welding Machine which also called by another name HF welding or RF welding , is a way to
weld two plastic parts by an electromagnetic field .The main application of High Frequency Welding are
tarpaulins, tents, ceilings, advertising banners, waterbeds, inflatable boats, medical and especially blood
and urine-bags, tensile structures, conveyor belts, rain clothing etc.
Working Principle of high frequency welding machine and why choose High Frequency Welding ?
The working principle of high frequency welding machine (HF welding) is based on di-electric heating of
the material to be welded.The products which to be welded are fixed between two metal electrodes which
normally we call it “upper electrode “ and bottom electrode“where a high frequency is applied . The material
begin to heat up because the molecule in the material vibrates, At last the material will be melt into together
and after cooling a solid and permanent welding seam has been created ,even stronger than the material
Advantage of HF welding :
1. Compared to high frequency welding, a lot of other methods (hot air, infrared radiation, laser) the energy /
heat is supplied from the outside. This means that the heat must first penetrate the material in order to heat
the contact-surfaces, thus risking to burn the top layer of the welded material.The great advantage of HF
welding is the speed of welding: The material is heated from the inside and fuses quickly, within few
2. The great advantage of HF welding is the speed of welding: The material is heated from the inside and
melts quickly, within few seconds.
Materials welded by HF welding Technology ?
The most common material welded by High Frequency Welding Machine is PVC and PU .
But also other synthetic material which contains 20% up PVC or PU ;
What are the main parts involved in HF Welding Machine?
Flatness of the electrode