The structure of the spinneret is divided into three forms according to the shape of the spinneret, round, fan and rectangular. At present, circular plates and rectangular plates are used more at home and abroad. In order to be suitable for different kinds of chemical fiber spinning occasions, round spinnerets are divided into flat plate type, flange plate type, plate ring, flange ring, etc.: rectangular spinneret is divided into flange rectangle and flange groove rectangle, etc., It is mostly used for short fiber spinning with more holes.