RF heat sealing (also known as dielectric sealing) uses high frequency energy to melt polar plastic material between two electrodes (known as RF Sealing Dies). Most commonly used RF frequency is 27.12MHz.
In the simplest terms, RF welder works like a microwave oven that (melts) plastic using high frequency energy similar to Microwave oven that heats the food at home. In this particular case the plastic uses polar molecules that orient them with the EMI field and heat the plastics compressed between the top and bottom RF sealing dies. Learn More..
Many medical products like blood bags, IV bags or urine collection bags are manufactured using RF welding systems.
Catheter forming process uses a mold (known as catheter tip forming die) that is heated to a set temperature and the catheter tubing is inserted into a heated mold. As the plastic melts and flows into the mold cavity, it is later cooled and removed from the mold as it becomes solid and takes the shape of the mold inner cavity.
The Mold is heated using induction coil. By running high frequency energy through a coil which induces current on the mold surface. The mold heats up due to the eddy currents and hysteresis caused by the electromagnetic field. Learn More.
Many catheter products, introducer tips, sheets, IV or CV catheters are formed using induction heated molds to form the distal or proximal ends.