Pellet

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A pressed part is a pre - formed semi-finished part with a matt surface.

Manufacturing

After the furnace all raw materials are connected to a hot liquid glass melt and all gas bubbles were removed therefrom is a lens -Pressling prepared. The melt is fed into the rotary indexing machine (rotary table press) via a pouring distributor channel. A precisely dosed drop of the viscous melt is placed on a bowl and then evenly distributed in the bowl under high pressure with the aid of a plunger. Depending on the shape of the shell and the stamp, a pressed part for minus or plus glasses lenses is formed with an allowance.

literature

• A. Look, J. Bliedtner: Basics of optics and technologies in ophthalmic optics . 1st edition. Verlag Fachhochschule Jena, Jena 2010, ISBN 3-932886-23-2 .