Mold unscrewing mechanism for making threaded articles

An unscrewing mechanism for forming threaded components comprising:

• a fixed core cooling plate;
• a bottom bearing plate in overlying relationship to the fixed core cooling plate and fastened to said fixed core cooling plate;
• a stationary plate in overlying relationship to the bottom bearing plate and fastened to said bottom bearing plate;
• a stripper plate in overlying relationship to the stationary plate;
• at least one elongate mold core, the at least one elongate mold core being rotatable and disposed on the fixed core cooling plate at one end and rotatably extending therefrom through an aperture in each of the bottom bearing plate, the stationary plate and the stripper plate such that a threaded surface portion at an opposite end of the at least one elongate mold core extends beyond an upper surface of the stripper plate when said stripper plate is in a position for molding another component and said threaded surface portion being adapted to engage a mating mold in a cavity plate which defines a mold cavity in which material may be injected to form a threaded component while in a mold closed position;
• bearing means in each of the stationary plate and bottom bearing plate through which the at least one elongate mold core extends, for facilitating a rotating action of the at least one elongate mold core in a clockwise and counter-clockwise rotation;
• the at least one elongate mold core having longitudinal gear teeth around a perimeter of an intermediate portion of said at least one elongate mold core, the intermediate portion with longitudinal gear teeth being disposed in the stationary plate;
• an elongate drive gear, the elongate drive gear being parallel to the at least one elongate mold core and rotatably disposed at a first end in the bottom bearing plate and rotatably extending therefrom through an aperture in the stationary plate;
• bearing means in each of the stationary plate and bottom bearing plate through which the elongate drive gear extends, for facilitating a rotating action of the at elongate drive gear in a clockwise and counter-clockwise rotation;
• the elongate drive gear having longitudinal gear teeth around a perimeter of an intermediate portion of said elongate drive gear, the intermediate portion with longitudinal gear teeth of the elongate drive gear being disposed in the stationary plate;
• the longitudinal gear teeth of the elongate drive gear being in cooperative gear teeth mesh engagement with the mating longitudinal gear teeth of the at least one elongate mold core;
• means for driving the elongate drive gear so as to cause clockwise and counter-clockwise rotation such that when the elongate drive gear is made to rotate clockwise, the at least one elongate mold core rotates counter-clockwise, and when the elongate drive gear is made to rotate counter-clockwise, the at least one elongate mold core rotates clockwise;
• the stripper plate being separable from the stationary plate in a direction parallel to an axial direction of each of the at least one elongate mold core and the elongate drive gear;
• the elongate drive gear having jack screw means at its second end for causing the stripper plate to separate from the stationary plate for releasing the formed threaded component as the elongate drive gear is made to rotate in a predetermined direction, and for causing the stripper plate to return for forming another threaded component as the elongate drive gear is made to rotate in a pre-determined opposite direction;
• and
• the jack screw means being threaded and metered so that the stripper plate is moved to eject the formed threaded component in the same sequence that the threaded surface portion of the at least one elongate mold core is unscrewed.