The copper nuts we come into contact with are mainly hexagon nuts or other copper nuts that match the bolts.
So why are copper nuts used in daily production activities? Because copper nuts have the advantages of not being easy to rust, anti-corrosion, easy to conduct heat and strong electrical conductivity, they are generally used for rust prevention, high temperature, electrical conductivity, and thermal conductivity. , Such as faucets, valves, electrical switches, etc.
The other main use of copper nuts is injection molding, which is embedded into plastic parts after heating or directly injection molded. As mentioned above, brass has good thermal conductivity. If it is embedded after heating copper nuts, on the one hand, copper nuts It can heat up quickly to speed up work efficiency. On the other hand, the heated copper nut can quickly transfer heat to the plastic part, so that the periphery of the plastic hole becomes soft, which is conducive to pressing into the hole; then, if the mold is used, the effect will be What if? As we all know, the melting point of PA/NYLOY/PET is above 200°C. The temperature of the copper nut is quickly increased after being melted into the plastic part. After injection molding, the plastic body is rapidly cooled and hardened. If the temperature of the copper nut is still at a high temperature, What will be the result? Smart, you must have guessed it, and the result is that the place where the copper nut contacts the plastic part develops loose or cracks. Therefore, copper nuts are used in injection molding instead of steel nuts.
The shape of the copper nut used in injection molding is generally round with various patterns. The hot-melt mold is generally cylindrical. The shape of the hot-pressed or cold-pressed copper screw has a certain taper or has a barbed shape. As for Why is it tapered or barb-shaped, clever you guess.