A press-forming method

The present invention discloses a press-forming method, the following steps: (1) a LDPE film laid on the positioning of the die table; (2) a sheet blank laid on the LDPE film; (3) the other LDPE film laid on the sheet blank; (4) a bead ring placed on another of the LDPE film, the sheet blank is clamped between the pressure ring and the die edge; (5) disposed punch the concave upper die and lower punch, drawing down the sheet blank forming; (6) rises to return the punch and exit. Further, further comprising a hydraulic press, the die is placed on the base of the hydraulic machine, the punch is placed on the cylinder of the hydraulic machine. The present invention solves the prepared head are difficult to clean, X-ray film detection low pass rate, high failure rates after welding simple technical problems, and the structure, low cost, widely used in industrial production.