DE8125374U1 - EYEWEAR FRAMES (I) - Google Patents

Description

I (ί ι I CtI t I t C C ί I t I ί ((t t t I

_ 3 _ 81 i95 EM

Ferdinand Wagner GmbH & Co. 7530 Pforzheim, Tunnelstr. 31

Eyeglass frames (I)

The innovation concerns spectacle frames and spectacle frame parts made of a multilayer material.

Metallic materials are used to a large extent for spectacle frames and spectacle frame parts. To this Materials are subject to special requirements.

One of the most important requirements is one in particular high corrosion resistance, such as that guaranteed by precious metals or titanium. Even Multi-layer materials with a core made of a less corrosion-resistant material and a noble metal coating are useful if this precious metal coating is absolutely tight and no pores or cracks having. If the coating is damaged, contact corrosion occurs, which leads to discoloration.

Furthermore, the materials for spectacle frames and spectacle frame parts must have good spring properties. and have sufficient resistance to bending. There must be a compromise here, however be taken so that the frame can still be easily adjusted, but not during daily use

bends too quickly.
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In addition, the materials should be easy to process, in particular easy to solder and weld, if possible

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have a low specific weight and be inexpensive.

It was therefore the task of the present innovation, spectacle frames and spectacle frame parts from one To create multi-layer material that optimally meets all these requirements.

This object has been achieved according to the invention in that it has a core made of a copper alloy 40-70 percent by weight nickel and 0.1-4 percent by weight manganese and a jacket made of a nickel alloy with Have 8-15 percent by weight of chromium.

Advantageously, the core consists of a copper alloy, which is 40-48 percent by weight nickel and Contains 0.5-2 percent by weight manganese, or 65-70 percent by weight nickel, 0.5-2 percent by weight manganese

and an additional 0.5-2 percent by weight iron. 20th

The jacket is preferably made of a nickel alloy that contains 8-15 percent by weight of chromium up to 2 percent by weight silver, up to 1.5 percent by weight copper or manganese and up to 0.5 percent by weight each Can contain iron or silicon, individually or in groups.

It has proven particularly useful if there is an intermediate layer of pure nickel between the jacket and the core arranged, preferably in a thickness of 5-40 µm, while the thickness of the nickel-chromium layer preferably 10-80 μm, in particular 20-60 μm.

Between the core and cladding or between the core and the nickel layer, there can advantageously be one more another layer of silver, copper or their alloys arranged for better adhesion be, best in a layer thickness of 0.1-2 μπι, All layer thickness specifications refer to a round wire with a diameter of 2.0 mm ". For smaller or The layer thicknesses change proportionally to the larger diameter.

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These spectacle frames and spectacle frame parts according to the invention are very corrosion-resistant good spring properties and mechanical strength, are easy to process, light and inexpensive.

15th

The semi-finished products are manufactured using known manufacturing methods such as drawing and rolling.

The figure shows schematically in an exemplary embodiment a cross section through an innovation according to the invention Glasses temples. This consists of a core made of a copper alloy and a jacket 2 a nickel-chromium alloy. There is also a pure nickel layer between core 1 and cladding 2 3 and a layer 4 made of silver, copper or their alloys.

30th

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- 6 summary:

Eyeglass frames (I )

There are described spectacle frames and spectacle frame parts made of a multilayer material that are very corrosion-resistant, have good spring properties and high mechanical strength, are easy to process, are light and inexpensive. They have a jacket (2) made of a nickel alloy with 8-15 percent by weight Chromium and a core (1) made of a copper alloy with 40-70 percent by weight nickel and 0.1-4 Weight percent manganese.

Claims (1)

I I I I 1 1 I I I I> I 1 1 1 I I - 1 - 81 195 EM Ferdinand Wagner GmbH & Co. 7530 Pforzheim, Tunnelstr. 31 Eyeglass frames (I) | Protection claims: I 1. Spectacle frames and spectacle frame parts I a multilayer material, | characterized, s that they have a core (1) made of a copper alloy | 15 with 40-70 percent by weight nickel. And 0.1 to I 4 percent by weight manganese and a jacket (2) ξ: _{# Made} of a nickel alloy with 8-1 5 percent by weight of chromium. I 20 ί 2. Spectacle frames according to claim 1, I ·. characterized, [' that the core (1) made of a copper alloy with I 40-48 percent by weight nickel and 0.5-2 percent by weight i ■ consists of 25 percent manganese. 3. Spectacle frames according to claim 1, characterized, 30 that the core (1) made of a copper alloy with 65-70 percent by weight nickel, 0.5-2 percent by weight manganese and an additional 0.5-2 percent by weight Iron is made. 35 4. Spectacle frames according to claim 1 to 3, characterized in that that the jacket (2) made of a nickel alloy with 8-15 percent by weight of chromium, up to 2 percent by weight Silver, up to 1.5 percent by weight of copper and / or manganese and up to 0.5 percent by weight of iron and / or silicon consists. 5. Spectacle frames according to claim 1 to 4, characterized in that that between core (1) and jacket (2) there is a layer (3) made of pure nickel. 15th 6. Spectacle frames according to claim 1 to 5, characterized in that that between core (1) and jacket (2) a layer (4) made of silver, copper or their Alloys is located. 7. Spectacle frames according to claim 1 to 6, characterized in that that the jacket (2) has a layer thickness of 10-80 μΐη, in particular 20-60 μΐη, the nickel layer (3) a thickness of 5-40 μm and the layer (4) has a thickness of 0.1-2 μm, where the layer thickness information relates to a round wire with a diameter of 2.0 mm.