High Frequency Dielectric Welding Machine Creating Water-Poof and Air-tight Seal With Science

High Frequency Dielectric Welding Machine Creating Water-Poof and Air-tight Seal With Science

High Frequency dielectric welding machine can exert reliable sealing process of membrane structure seam bonding, blister packages sealing, conveyor belt profiles melting seal and flexible items making in versatile fields of industrial manufacturing, medial, military ,pharmaceutical, Aerospace welding process in consumable items made of TPU,TPE,PVC Films & coated fabrics, PVC & Urethane Foams, Urethane coated fabrics, polyolefins, EVA, polypropylene and polyethylene,Indispensable in the field of vinyl fabric technologies, High Frequency (HF) Dielectric welding, also called radio frequency (RF) dielectric welding, it has an utmost sealing method by which two materials are adhered using electronic currents, this versatile and simple process is used on many engineered textile products, from simple seam and patch attachment to complete item manufacturing

High Frequency dielectric welding machine benefits from instantly controlled melting of molecular-scale ranged at the localized joints under proportional pressure applied,high frequency sealing occurs when an alternating current crosses between two plates, usually through a bar or a metal die, and through heat and pressure bonds two thermoplastic together, PVC compounds contain polar molecules, or molecules with magnetic poles,these types of molecules are easily excited by RF/HF energy, every similar to water molecules in items placed in a microwave, as the molecules move more and more, heat is created with melts the thermoplastic, when this process is combined with shaped dies or bars and pressure, thermoplastic are bonded to an extent that creates a stronger material than either base material used to create the product.

Stationary high frequency dielectric welding uses a machine with a moving top plate for ease of material and die placement, the basic operation of High Frequency dielectric welding machine is:

1st step: Electricity enters the machine at 220 volts (alternating current-A/C).most of this power goes toward powering the dials,lights and controls

2nd step: Energy flows into the step-up transformer, which increases the 220 volts to 7500 volts

3rd step: current then flows to the rectifier tube, which changes the A/C to direct current D/C

4th step: The current flows to the oscillator tube, creating high frequency by taking the D/C and change it back and forth between electrostatic charge and magnetic field, this oscillation changes the current to A/C with a frequency proportional to how often the current changes states

5th step: The high frequency radiation travels to the top plate when the machine’s sealing cycle is activated, the radiation will complete the circuit through the die and material to be sealed

6th: The HF flows from the top plate, through the die,to the bottom plate, the circuit is completed as the bottom plate feeds the current back through to the rectifier tube

Why use the high frequency dielectric welding, seals created in HF/RF sealing are more complete than hot air or sewn seams, with hot air, there is still heat and pressure but due to the delivery system the outer layers tend to be the part of the materials that melt, when tension is placed on these types of seams the individual layers of the material may separate and cause the seal to fail, a HR weld causes all parts of the material to heat and melt, due to the heat being derived from the molecules’ movement, sewn seams carry with them any problems associated with sew lines, including the holes in the material caused by the process, the added chance of failure due to tread breaking or expose, and the difficulty of sewing various shapes which may be more problematic due to seam location on a product

Ubiquitous process, high frequency dielectric welding is used on most of thermoplastic seam sealing, it is used to attach patches and items to heavy duty canopies, to attached cathedral windows in tent sidewalls, create smaller components used on humanitarian and military shelters, blister packaging, and other flexible items building, it is also the primary construction method for disinfecting mats, the water-proof seal keeps all contaminates within as opposed to sewn mats, which are perforated from the sewing process, with just a few different shapes of dies and bars, fabric material sealing has allowed designs and products to advance by leaps and bounds