RF Welders | HF Generators | Machines & Technologies for Packaging


		RADIO FREQUENCY DRYER Model - GHP80/30 000

This highly specialized machine is used for drying and forming preshpan izolation collars used in power transformers.

The machine is composed of specialized hydraulic press GHP80 and High Frequency power generator GX 30 000.

Thanks to this machine we may dry and form collars from variety kinds of preshpan (wet and dry preshpan LD or HD) within the range from 0,5 to 5mm thickness.

The operator puts material on the lower immovable form and then it is pressed by the upper form powered by the hydraulic servo-motor. Under pressure of 1-3kg/cm2 and high frequency energy that is delivered to the upper electrode, during 4-15 minutes forming and drying processes are taking place. After final cutting out and polishing we obtain final product.

In the process of drying we use antithetic energy of electric field with frequency of 27,12 MHz. In this process we place wet preshpan in the antithetic electric field of capacitor (it is made of lower grounded form and upper part of form supplied by the antithetic working frequency of 27,12MHz from generator. Preshpan is heated steadily in all volume to the temperature of boiling. In this process we have an effect of dielectric loss of water from preshpan. In dependence of preshpan thickness drying and obtaining final product may take something about 15 minutes.

In case of LD preshpan (1-1.5mm thickness) we may dry and form several collars in one working cycle of the machine.

Thanks to aluminium forms we may get collars with radius in the range starting from R300 to R2000. There are two kinds of collars we may produce: external (outners) and internal (inners).

Types of collars:

+ Corner collars are used mostly as izolation elements between turns of winding on the winding. These are made of LD preshpan 1-2mm thickness and radius of 300-200mm with dimensions of (width of base/height) up to 50/50mm. The inner and outer options are possible. The U-bend radious is around 1mm.

+ Yoke collars are used as finishing elements in transformator sleeves. These are made of LD preshpan 2-5mm thickness and radius of 300-200mm with dimensions of (width of base/height) up to 150/250mm. The inner and outer options are possible. The U-bend radious is 5, 10, 15, 25 mm



electrode	control panel	specialized form holding profil

MACHINE TECHNICAL SPECIFICATION

HYDRAULIC PRESS GHP 80

+ construction of the press is made of steel sheets welded together
+ work table dimensions - 1300 x 800 mm
+ pressing tools mounted at the angle of 45 degrees just to make work of the tool more ergonomic
+ press drive- hydrualic servomotor
+ press system working stroke 400mm
+ maximal press force
+ press force regulation 10-89kN
+ pressure
+ hydraulical tools by Rexroth
+ aluminium work table preheated for optimization of collar drying process
+ temperature of working table regulated within the range of 40-140 °C and stablized by Danfoss thermostats – work table surface formed with water outflow ducts
+ 3-point mounting fast fixing system for top form
+ pneumatic by FESTO
+ compressed air consumption 8dm³/cycle
+ working zone of machine is well protected during the work cycle by special screens- it protects operator from harming effects of high frequency radiation and secure access to the dangerous zone

HIGH FREQUENCY POWER GENERATOR GX 30 000

+ power supply- 3 x 400 V ; 50 Hz (or for customer request)
+ instaled power- 50 kVA (max)
+ output power- 30kW
+ working frequency – 27,12 Mhz (stabilized +/- 0.6%)
+ automatic regulation and stabilzation of output power- high frequency autotuning system controling position of outgoing capacitor
+ Triode metal/ceramic ITL 15 by THALES
+ air cooling system

SAFETY AND STEARING SYSTEMS

+ touch screen panel control SIMATIC S7 by SIEMENS
+ central control unit by SIMENS
+ machine may work in manual and automatic modes
+ possibility of programing and saving 20 programs for forming and drying collars
+ automatic power regulation- autotuning
+ all shields have safety buttons
+ CE rated

** Custom built tooling (electrodes) available upon request. We have our own in-house tooling shop which will make any electrodes and dies your production requires.

** Each machine is built according to customers needs and production specifications. We can modify and adjust any of the above parameters if required at additional cost.

** Our welders fully comply with CE regulations for EU radio frequency machine standards and have EQM European Quality Mark.