Injection mold

The utility model discloses an injection mold, including last mould, lower mould and drawing of patterns piece, go up mould and lower mould cooperation setting, drawing of patterns piece is gasbag class drawing of patterns piece, bury yu shangmo and lower mould underground inside, it is equipped with the air flue to go up mould and lower mould combination department, injection mold still includes heating member, negative pressure generator and time controller, the heating member sets up in last mould and lower mould inboardly, negative pressure generator passes through the trachea and the air flue is connected, time controller and negative pressure generator are connected, heating device has been adopted in mould structure design, guarantees the mold temperature that remains stable to bury in the mould in the mould shaping die cavity underground at drawing of patterns gasbag, can effectually break away from drawing of patterns gasbag and inner chamber, prevents the high temperature, produces deformation, and the air flue department that sets up in last mould and lower mould combination department connects negative pressure generator, reaches to become to exhaust into the carminative method of taking the initiative time controller effective control period of exhaust, temperature monitor real time monitoring mold temperature change passively.