Vario Press Ovens

VARIO PRESS 330.e / 330.eZR Combi-Press/Ceramic Ovens

Advanced Press technology with linear cooling for ceramic and zirconia!

The VARIO line of ceramic & pressing ovens from Zubler have become widely respected for their quality, longevity and relevant capabilities. The features of the latest line of Zubler VARIO PRESS series ovens possess advantages other ovens have tried to replicate. The Advanced Press and TTC Linear cooling features provided by the VARIO PRESS 300.eZR make it the premier combination pressing & ceramic oven.

New for 2022, Zubler introduces the all new VARIO PRESS 330eZR Combi-press oven with all new features and capabilities!

  • New agile touch screen interface with intuitive menu structure!  The new interface allows users to make changes more rapidly and move through menus more efficiently.
  • New Automatic, Dynamic Pressing Power Control!  This new technology recognizes the required force for pressing and automatically regulates the force of the press!
  • The ADVANCED PRESS feature offers rapid pressing of lithium disilicates while reducing reaction layer formation. 100g rings can pressed in as little 12-14 minutes!
  • TTC Mode program types provide linear cooling prior to the “Open time” portion of programs. Designed for sensitive ceramics like lithium disilicate and layered zirconia, TTC Mode has become noted for Zirconia full arch layering, staining and glaze firing. The TTC program types compliment the ADVANCED PRESS for lithium disilicates.

Z-Dry

For optimal pre-drying, to avoid cracks and blisters, it is best to pre-dry at a constant temperature of 130°C. Utilizing the symmetrical lift design, chamber temperature and lift position, the VARIO PRESS 330.e/330.eZR maintain the optimal pre-dry temperature by reading the chamber temperature, and will adjust the lift to compensate for any changes in the radiant temperature. Cracks or blisters are prevented by controlled drying with the Z-Dry Mode. In subsequent firings you save wait-time thanks to the Z-Dry Mode. The work can be placed on the firing tray well before the programmed start temperature has been attained.

Technical Data:

Dimensions: (H x W x D) 765mm x 360mm x 425mm
Weight: 27 kg
Voltage: 115Vac 50/60Hz
Power: 1300 W

Scope of Delivery (Quantity)

VP330.e/VP330.eZR Press ceramic oven x 1
Power cable x 1
Flex Ring System 100g + 200g x 1
Press tray x 1
Firing tray x 1
Vacuum hose including filter x 1
Compressed Air Hose 2m x 1
Sample of 13mm Disposable Plungers x 1
Ring Tongs x 1
Spare fuse x 1
USB flash drive x 1
Tweezers, long x 1
User’s manual x 1

Intelligent electronics controlled by Software control the press valves to maintain the correct pressing power dynamically during the pressing process. For the user, this provides two major advantages over previous technologies:

1. The furnace can now react to pressure fluctuations from air hoses and other equipment on the airline.  This issue particularly affect weaker systems and has created mis-presses in other ovens.

2. The system adjusts the pressure depending on the flow rate of the ceramic. This function significantly reduces load on the investment ring structure.  Since dental restorations never have uniform layer thickness (due to their anatomy),  the flow velocity changes during the pressing process. A conventional furnace that applies a constant single speed and pressure may crack investment ring structures, or cause mis-presses if settings are incorrect, or line pressure is inconsistent.

he handling of the furnace was developed according to the requirements of modern dental technology. Each firing or pressing program can be created very easily and intuitively for the used technique. Programs are archived in folders similar to those of a computer and can be called up individually for each product or user.
During a running program the display – made of high-quality safety glass – shows the most important parameters as well as a real-time parameter. The large 12-inch display with LED back-lighting allows you to read the program progress even from a greater distance or from an unfavorable angle. If temporary changes to the parameters are required during a running program, they can be made directly on the touch display. A pop-up window opens and all parameters that you can change during the running program are shown on the display. At the end of the program, all parameters are reset to their original values.
These and many other useful features are an important element in the modern dental laboratory and allow the dental technician to work comfortably and efficiently with the new VARIO PRESS 330 pressing and firing furnace.

The firing of dental ceramics on zirconia sub-structures carries a high risk of crack formation while cooling. With the VARIO PRESS 330.e ZR, the new TTC technology is available to you.
In this process, a linear, controlled cooling is possible by specifying a temperature gradient between 5°C/min and 45°C/min within a firing program. Thanks to the innovative design of the outer firing chamber and an intelligent software, an actively controlled return of the ceramic to the temperature range below the glass point is guaranteed. This reduces the risk of cracks and the dreaded „chipping“ of the dental ceramics used is reduced to a minimum.

Graph 1 shows the temperature difference of approximately 40°C between the set temperature in the pressing furnace and the inside temperature of the ring during standard pressing. The high temperature difference between the ideal press temperature for lithium disilicate in the ring core and the high temperature in the outside area of the ring, where the pressed objects are usually located, leads to a strongly pronounced reaction layer. This effect is reinforced by the long holding and pressing time. The result is a rough surface (orange peel) and time-consuming, laborious finishing.
Graph 2 shows the homogeneous temperature distribution from the thermal sensor of the pressing furnace to the inside of the ring. There is a maximum temperature difference of 4°C. This ensures that all objects, regardless of their position in the ring, are pressed in the ideal pressing temperature range for lithium disilicate. The formation of a reaction layer is reduced to a minimum, and the extremely short pressing time further supports this eff ect. Smooth, homogeneous surfaces as well as enormous time saving in finishing and finalising the restoration are the result of ADVANCED PRESS™.

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