Insert nut is a part that is used to reinforce joints between materials by being embedded in plastic.Normally, when screws are used for plastics such as synthetic resin, the strength of the material is lower than the strength of the metal, so joints easily disengage. Therefore, by inserting a metal insert nut into plastic, it secures the strength of the joint part.There are abundant types of insert nuts, large and small insert nuts can be selected according to the use. There are several ways to embed an insert nut, and the necessary tools are different according to the method.
Usage of insert nut is mainly divided into "insert at molding" and "insert after forming".Insert molding method is to insert the insert nut beforehand when molding plastic.Insert nut is tightly connected because plastic is flowed firmly around the insert nut and molded. However, it must be embedded in the insert nut during molding, so it can not be used for already molded plastics.After molding, the insert is a method of embedding the insert nut in the plastic which is already molded afterwards. The method can be further divided and categorized into "press fitting method", "heat press fitting method" and "expansion method".Since the appropriate method varies depending on the material to be used and the application of the finished product, you need to select after understanding the characteristics of each.
Insert nut is a method to strengthen joints of relatively low-strength material such as plastics as mentioned above. In general households, it can be widely used for DIY.You can purchase at home center or mail order site, you can easily install using common tools such as hammer, punch and soldering iron. However, when there is no pilot hole in the material to be inserted, it is necessary to open a hole of moderate size.For personal use, it is widely used, for example, in mobile phones and home appliances. When it becomes even bigger, insert nuts are often used for automobiles and trains, too.