Ullrich GmbH stands for innovative, pioneering and customer-specific solutions. With our many years of production knowledge, we consider ourselves to be an expert partner for your individual requirements.

Our activities are focused on manufacturing gobs. We can therefore provide you with expert knowledge concerning semi-finished glass products (gobs), but also if you need individual, customised glass products.

Highly-qualified engineers with lots of practical experience are happy to make your requirements into reality.

We supply preformed gobs which are suitable for double-sided glass mouldings. Gobs are produced by injecting the molten glass directly into moulds. The internationally patented Tritan® crystal glass is used for this.

Technical properties

    Refraction index      nd          1,5221
    Abbe number            Vd        56,75
    Density                  g/cm3          2,52
    Thermal expansion α (20°C; 300°C)  10e-6*K-1       9,3

Semi-finished glass products

• Gobs are suitable for double-sided glass mouldings
• A lens is pressed from the gob due to a transformation at approx. 400° – 850°C
• The advantage of the glass mouldings is the diversity of shapes which a pressed optical part can take (e.g. notches, openings, edgings)