Lead-free and nickel-free environment-friendly glasses copper needle

Abstract

The invention provides a lead-free and nickel-free environment-friendly glasses copper needle. Copper, iron, nickel, palladium, molybdenum, tin, manganese, rhodium and zinc are taken as special brassmaterials for manufacturing the copper needle. Iron, nickel, palladium, molybdenum, tin, manganese and rhodium can improve the strength of brass, so that the copper needle bears larger force without plastic deformation, an alloy does not contain a lead element, lead poisoning cannot be caused when the glasses copper needle is worn for a long time, nickel element content is extremely low, nickel release amount cannot be reached, and no harm can be caused to people. Raw materials are melted at high temperature to form a bar stock, and then the bar stock is processed by die extrusion, pattern machining by a milling cutter, punching by a plate pushing machine, polishing by a polishing machine, welding by a welding machine and other machining to enable a copper bar to be manufactured into a finished product of the glasses copper needle. The surface of the finished product is electroplated with a tin-cobalt alloy to enable the finished product to have bright metal texture, and the finished product is not prone to being worn, and corrosion and rust can not occur when the glasses copper needle is worn for a long time.

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 thread of glasses is generally two kinds of synthetic resin and metal. Although the thread of synthetic resin is light, its toughness is not high. Therefore, more and more eyeglass manuf...

AI Technical Summary

Problems solved by technology

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

Images