To those unfamiliar RF Welding Machine with the manufacturing world, radio frequency welding (RFW) may seem like a space age method to attach two objects, but the process is actually quite simple. In fact, radio frequency welding is known as a mature technology due to its ease of use for both professional and novice workers. The capabilities of this process range from creating a variety of protective covers to a massive industrial curtain wall and it all starts with two pieces of material placed on a table press. The most common materials used in radio frequency welding are polyurethane and PVC.
High frequency welding, otherwise known as dielectric or radio frequency welding, is a process used to bind plastics. High frequency welding falls under several other umbrella terms, such as heat sealing and plastic welding. The technology behind high frequency welding has been around for quite a while, from the 1940's actually, so it is a proven and reliable technique used in product manufacturing. By applying radio frequency energy to certain receptive materials it allows them to be bonded, and many times the weld can be just as strong as one uniform piece of material. This makes it a popular choice where leak proof seals are needed.
High frequency welding relies on manipulating specific properties of a material. By utilizing a high frequency (13-100 MHz) electromagnetic field, hf welding generates the heat necessary for a heat seal bond. The area to be welded is pressed between two metal bars which act as both the conduits for the energy field and the pressure applicators for heating and cooling. When the frequency is applied it causes the molecules of polar thermoplastics, such as PVC, to spin. The molecules spin fast enough to generate a strong heat which makes the material malleable and capable of being altered to the shape of the die (the metal bars in this case.) The pressure keeps the surfaces tightly together so that when the high frequency is turned off and it cools it makes a leak proof weld.