The thread of injection parts is divided into internal thread and external thread. The thread shape of threaded products is generally divided into standard thread, rectangular thread, trapezoidal thread, sawtooth thread, arc thread and V thread . You can choose different shapes for different purposes, and you can choose zigzag threads to meet your strength requirements. About the commonly used today
Bottles and cap screws are often tightened 1-2 times with bow screws in multiple directions.
Compared with metal, the strength of plastic is not high, plastic is generally soft, and the thread of plastic parts should be larger. If the screw diameter is small, it is best not to use a thin screw, otherwise the shortening of the plastic screw will make it difficult to achieve the required strength. You can generally choose from the table below.
There are several methods of thread injection products.
- 1. Direct molding during molding.
- 2. Use the processing method after processing.
- 3, using metal threaded inserts, this method is often used in situations that require repeated assembly and disassembly and greater mechanical strength.