The main operation modes of embedded knurled copper nut are injection molding, heating or direct injection molding and embedding into plastic parts. If injection molding is used, the melting point of PA/NYLOY/PET is above 200°C, and the temperature of embedded nuts rises rapidly after hot melting into plastic parts. After injection molding, the plastic body quickly cools, crystallizes and hardens. If the temperature of the embedded nut is still high, it may drop to the place where the copper nut comes into contact with the plastic parts and start to loosen or crack. Therefore, copper nuts are used instead of carbon steel nuts in the injection molding of embedded nuts.
There are two ways to form the external knurling of embedded copper nuts. One method is to use copper raw materials for wire drawing, and then to produce on the equipment. Generally, the lines drawn in this way are straight lines, and the other way is to use smooth copper material to directly tap teeth and emboss in the production process. This processing method can produce some knurled copper nuts with non-standard sizes, and the embossing shapes of embedded copper nuts can be selected by users, such as mesh, figure-eight embossing, herringbone embossing and so on. general situation
Injection molded copper nuts can also be understood as embedded copper nuts or embedded copper nuts. There are injection-molded copper nuts for different purposes in the market.
Its working principle
The main function of copper insert is to inject products into some plastic parts, and effective internal threads can be formed in the plastic parts after installation. Its operation mode is to embed the product into a plastic part after heating or directly use a mold for injection molding. Because brass has good thermal conductivity, pressing the copper insert into the plastic matrix after heating can quickly raise the temperature of the product and speed up the work efficiency. The heated copper insert can also quickly conduct heat to the plastic part, thus softening the periphery of the plastic hole and pressing the product into the hole quickly. If the mold is used for injection molding, the copper insert is thermally injected into the plastic part. After molding, due to the embossing process on the outer diameter, it forms a certain friction force and bite force with the copper insert, so that it is fixed inside and will not fall off.
use
Products are widely used in: mobile phones, portable computers, various plastic casings, communications, micromotors, computers, electrical appliances, electronics, toys, watches, lighting, locomotives and other industries.
type
Mainly include: CNC computer parts, mobile phone nuts, embossed nuts, hot-melt nuts, hot-pressed nuts, embedded nuts, ultrasonic nuts, injection nuts, embedded nuts, copper shafts, copper columns, copper sleeves, copper cups, precision shafts and non-standard screw nuts. There are tens of thousands of specifications.
Product raw materials
Mainly include: environmental protection copper, C3604 copper and H59 copper.
Copper nuts are also called embedded nuts and embedded copper nuts or plastic embedded nuts, which can be divided into hot-melt copper nuts, hot-pressed copper nuts, embedded copper nuts and ultrasonic copper nuts according to different usage methods.
This product is widely used in mobile phone shell/notebook shell/injection molded parts/plastic parts as internal threads. Generally, the excircle is embossed to prevent sliding. As the name implies, embedded copper nuts are nuts made of copper materials (generally lead brass, such as H59 and H62). The embedded copper nuts we come into contact with in daily life are mainly hexagonal nuts or other types of embedded copper nuts that match bolts.
Why do we use embedded copper nuts in our daily production activities? Because the embedded copper nut is not easy to rust, corrosion-resistant, easy to conduct heat, strong conductivity and other advantages, it is generally used in rust-proof, high temperature, conductive and thermal environments, such as faucets, valves, electrical switches, mechanical assembly and so on.