EYEWEAR MANUFACTURING

The four groups of our production line are manufactured in different departments as devided in:

    1.    PRODUCTION GROUPS   

                1.1    Optical Frames for prescription lenses

                1.2     Reading Glasses for ready made low vision glasses (+ Diopter only)

                1.3    Plastic Frames for Sun and Reading Glasses

                1.4    Acetate Frames ( Zyl) for all kinds of glasses

    2.    MANUFACTURING STEPS

                2.1    Optical Frames

                2.1.1 Metal Frames ( Full Rim )

                Traditional optical glasses are using full metal rim construction with standard temple and accessories like nose-pad , bridge and tip. Used materials varies from  Monel Ni-alloy , to Stainless Steel and Titanium Alloy (ref. www.ferd-wagner.de )   Starting with calculation the surrounding length of the rim to precisely cut the material which will be round shaped by machine or hand driven shaping tools which forms the curved rim to its primary shape before welding. Each single rim is welded by either resistance or inductive welding machines (ref. www.haug.de) later on placed on mold to combine left and right rim with the bridge, thereafter block (which opens for lens-mounting), nose-arm ( which holds nose-pad ), and temple (which was combined with hinge), is welded on. The hinge itself is an important component to assure high quality and reliability of frames ( ref. www.obe.de  www.redtenbacher.at ) Hand polishing on textile wheels  vibration- or rotating drums is required to achieve a high glossy surface for coating ( ref. www.basel.it ) , where either electro galvanic plating or painting is used for coloring the frames ( ref www.berlac.ch  www.m2-m3.it www.chimitech.com  ). After coating the temples are fitted with plastic tip ends and bended according customer specification.

            2.1.1.1 Metal Frames ( Half Rim )

For fashionable styles with half rim, the same  production way is used as above plus additionally the fixing of a transparent rope inside of both endings of the rim to hold the lens.

            2.1.1.2 Metal Frames ( Stainless Steel Wire )

Light weight frames for all kinds of glasses are made with 1.1mm metal wire frames which are either full - semi- or rimless. On wired frames all parts of the glasses can be made of the same wire, without welding.  Temples, hinges , bridge and nose-arm are winded on hand tools according required function and curves, which gives the advantage that complicated welding processes required for titanium glasses can be prevented.

             2.2  Reading Glasses ( also foldable )

Contrary to optical frames, where demo lenses are mounted, which later are replaced by prescription lenses, reading glasses are fitted with acrylic lens in diopter strength 1.00 -4.00  

            2.3 Sun Glasses

Mostly made by plastic injection process for the cheap line, or metal frames and hand made acetate frames for upper end qualities.

            2.4 Acetate Frames

The most handwork is required in acetate ( zyl ) production, because all parts are cut of full sheet of 5mm thick raw material ( www.mazzucchelli1849.it ) by using duplicating cutting machines where according to an original mold shape the production shape is manufactured. Starting with temples which are cut according length and shape and fitted with the hinge the front of frames is made by cutting the holes for lens and thereafter bended by applying heat to shape the form, and cut outside to fit the design.