A kind of lead-free and nickel-free environmental glasses copper needle

Abstract

The invention provides a lead-free and nickel-free copper needle for environmental protection glasses. Copper, iron, nickel, palladium, molybdenum, tin, manganese, rhodium and zinc are used as special brass materials for making copper needles. Iron, nickel, palladium, Molybdenum, tin, manganese and rhodium can improve the strength of brass, so that the copper needle can withstand large forces without plastic deformation. The alloy does not contain lead elements, and long-term wearing will not cause lead poisoning. Low, the amount of nickel release has not been reached, and it will not cause harm to people. The raw material is melted at high temperature to make a bar, and then the bar is extruded through a mold, the pattern is processed by a milling cutter, the pusher is punched, and the polishing machine is polished. , Welding machine welding and other machining processes make the copper rod a finished copper needle for glasses, and the surface of the finished product is electroplated with a tin-cobalt alloy, so that the finished product has a bright metal texture and is not easy to wear and tear, and will not cause corrosion and rust after long-term wearing.

Description

technical field [0001] The invention relates to the field of glasses manufacturing, in particular to a copper needle for lead-free and nickel-free environment-friendly glasses. Background technique [0002] Glasses are a good tool for correcting eyesight. As early as the Ming Dynasty, China’s mirror industry was very developed. The lenses of early glasses were ground from natural crystal stones, and the frames were generally made of bamboo or wood. , the frame is tied behind the head through a rope or a belt for use. Nowadays, due to the discovery of synthetic materials, the lenses are generally made of synthetic resin materials, and the frames are also made of various materials such as iron, copper, and plastic. Both are worn over the ear with hinged wire holders. [0003] At present, the wires of glasses are generally made of synthetic resin and metal. Although the wires of synthetic resin are light, their toughness is not high. Therefore, more and more eyeglass manufact...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a lead-free, nickel-free, environmentally friendly copper needle for glasses to solve the problem that the above-mentioned existing copper needles for glasses add elements such as lead and nickel to the material in order to improve the metal performance, and long-term wear will cause harm to human health.

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