Tire nut

Tire nut

Copper nuts made of various embossed wires (generally lead brass, such as H59, 3604, 3602). The embedded knurled copper nuts we come into contact with daily are all processed by precision automatic lathes. The reference standard of embedded knurled copper nut is from the national standard GB/T809.

The main operation mode of embedded knurled copper nut is injection molding and embedding after heating

In plastic parts or direct mold injection, if mold injection is used, the melting point of PA/NYLOY/PET is above 200 ° C, and the temperature of embedded nuts rapidly increases after being hot melted into the plastic parts. After injection molding, the plastic body rapidly cools, crystallizes and hardens. If the temperature of embedded nuts is still high, it is possible to pour to the place where the copper nuts contact the plastic parts and begin to loosen or crack. Therefore, copper nuts are used instead of carbon steel nuts in the injection molding of embedded nuts.

The external knurling of embedded copper nuts of die manufacturers can be formed in two ways. One is to use copper raw materials to stretch the knurling and then produce them on the equipment. Generally, the stretch pattern of this way is straight, and the other is to use smooth round copper materials to directly tap and emboss during the production process. This processing method can produce some non-standard knurled copper nuts. The embossing shape of embedded copper nuts can be selected by users, Such as net pattern, eight character embossing, herringbone embossing and other knurling patterns.