Mould

The utility model discloses a mould relates to mould technical field, including last mould, lower mould and a plurality of ball, upward be provided with the mould boss on the mould bottom surface andencircle the supporting part around last mould boss, be provided with lower mould recess and lower mould ball groove on the lower mould, lower mould ball grooved ring winds in the lower mould recess,and a plurality of balls are installed in lower mould ball inslot, go up the mould boss and plant in the lower mould recess supporting part butt in ball. Through the mould who adopts above -mentionedstructure, set up the mould boss on last mould bottom surface, go up the mould boss and plant in the lower mould recess, ball one end butt on lower mould ball groove, ball other end butt in supportingpart for this mould's last mould boss is parallel to each other before the compound die with the bottom surface of lower mould recess, has avoided last mould boss to lead to the glass stock cracked with the lower mould recess o