A serial communication port

The utility model provides a serial communication port, , including die, terrace die, last template, lower template and runner cover, die and terrace die setting are at last template under and between the template, and the die is fixed on last template, and the terrace die is fixed down on the template to, terrace die and die compound die form and print the die cavity that the cover matches, be equipped with the reference column on going up the template, lower template is equipped with permits reference column male locating hole, the runner cover passes template and die in proper order, and with the die cavity intercommunication, the runner is sheathe in and is equipped with the toper sprue, and the tip of toper sprue is located the feed end of runner cover, the cooling water course passes down template, terrace die, goes up template and die to the entrance point setting of cooling water course is on last template, the surface of terrace die and/or die is equipped with a plurality of and is used for carminati