In-mold spraying system and process method

The in-mold spraying system comprising:

• a double-inclined mixing nozzle connected obliquely and fixedly with a side surface of a third half-mold through a lateral sealing structure, and connected with a side surface of a first half-mold in an inclined and sealing manner, side surfaces of the first half-mold and the third half-mold are respectively provided with installation inclined surfaces;
• the lateral sealing structure comprising a mounting plate and a sealing member, the mounting plate is fixed on an installation inclined surface of the third half-mold and extends on one side of an inner plane of a mold cavity of the third half-mold, the mounting plate and the inner plane of the mold cavity of the third half-mold form a side inclined angle of 95° ˜120°, the sealing member is sleeved on the double-inclined mixing nozzle and is in transition fit with the double-inclined mixing nozzle and the mounting plate respectively;
• and
• a butt sealing groove provided on the installation inclined surface of the first half-mold, the butt sealing groove is in sealing fit with the mounting plate.