A method for manufacturing a composite golf club head, the method performed with a mold having a mold cavity, a hot pressing auxiliary forming mechanism, and a heater, the mold having a mold cavity opening formed on a front side of the mold cavity, and the method comprising steps of:
- stacking multiple carbon fiber prepreg materials or multiple composite prepreg materials including carbon fiber on a side wall of the mold cavity of the mold to form a carbon fiber composite club head blank having a hosel and a front opening portion and being hollow;
- applying a vacuum negative pressure to an outer side and an inner side of the carbon fiber composite club head blank in the mold by the hot pressing auxiliary forming mechanism, simultaneously applying a positive pressure to the inner side of the carbon fiber composite club head blank, and heating the carbon fiber composite club head blank by the heater, wherein
- the mold having the carbon fiber composite club head blank is sealed by a vacuum negative pressure bladder of the hot pressing auxiliary forming mechanism, and the vacuum negative pressure bladder of the hot pressing auxiliary forming mechanism is mounted around the mold, a partial section of the vacuum negative pressure bladder is inserted into the inner side of the carbon fiber composite club head blank via the mold cavity opening of the mold, and the outer side of the carbon fiber composite club head blank abuts against a side wall of the mold cavity compactly;
- a positive pressure vacuum bag is inserted into the mold cavity via the mold cavity opening of the mold and abuts against the inner side of the carbon fiber composite club head blank through the vacuum negative pressure bladder;
- a vacuum negative pressure is applied to the outer side and the inner side of the carbon fiber composite club head blank by the vacuum negative pressure bladder and the mold;
- a positive pressures applied to the inner side of the carbon fiber composite club head blank by the positive pressure vacuum bag, wherein the outer side of the carbon fiber composite club head blank abuts against the side wall of the mold cavity compactly by a swelling force;
- and
- heating is applied to the carbon fiber composite club head blank by the heater, until the carbon fiber composite club head blank is heated and is pressed to solidify to form a carbon fiber composite preliminary and then the carbon fiber composite preliminary is taken out;
- applying a removal leftover and surface finishing process to the carbon fiber composite preliminary to form a carbon fiber composite semi-finished product;
- providing a striking face pre-formed by one of a metal material and a composite material including carbon fiber;
- and
- gluing and fixing the striking face on a front opening portion of the carbon fiber composite semi-finished product to form a composite golf club head.