RF (Radio Frequency) Welding is also known as "dielectric" sealing . The principle behind the process is the use of high frequency radio energy to produce molecular agitation in thermoplastic materials (ie:, polyurethane or pvc) to the point where they literally melt and weld together, typically forming a bond that is as strong as the original material.

To achieve the weld, flexible films are placed between a machined brass die (with raised areas representing the desired weld pattern) and a platten on the RF machine. The head of the machine comes down and generates pressure. The RF comes on and is channeled through the material in the pattern areas only, fusing the materials together at those points.

Advantages:

There are a number of advantages of RF welding over alternative welding technologies:

• Unlike with a straight heat weld, the material is only heated while RF is being generated. Once the generator cycles, the heat is turned off. This allows for greater control over the amount of energy that the material sees over the entire cycle. In addition, RF-generated heat does not radiate off the die like on a heated die. This prevents heat-degredation of the material abutting the weld.



• RF tooling is usually run "cold". This means that once the RF is turned off, the material stops being heated, but remains under pressure. In this fashion it is possible to both instantly heat, weld, and cool the material under compression. More control over the weld means more control over the melt, the extrusion, and the resulting strength of the seal.



• RF welds are "clean". Because the only material needed to produce an RF weld is the material itself, there are no messy adhesives or by-products involved in RF welding.

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Features:

24 x 30 Work Bed

14 x 24 Heated Upper Platen

10kw Power Requirements

• 440 Input Volts
• 200-280 vac
• 60 cycles
• 3 phase
• 30 amps per phase
• H.F. Power Out 10kw
• Freq. Mc. 27

Generator Features

• Frequency stabilized modular control box
• Plate and grid meters
• Three plug-in timers
• Self test arquench with sensitivity control, and production counter
• Air filters
• Dual blower cooling system.

Press Features

• Full R.F. and safety shielding
• Quick die disconnect
• Heavy duty tubular steel press construction
• Adjustable speed control valves
• Air filter water trap with regulator and automatic lubricator
• Air silencers
• Adjustable stop for stroke adjustment
  
• Caster mounted

Manufacted March 1987