Patent ID: 7530807

Claim:
A mold structure adapted to permit a molding material to be fed thereinto, said mold structure comprising: a mold seat including a pair of upper and lower mold units having respectively molding surfaces defining a mold cavity therebetween, said lower mold unit further having a lower air chamber adapted to be communicated with a pneumatic device, and at least one guide hole disposed between said mold cavity and said lower air chamber, said guide hole being formed in said molding surface of said lower mold unit at a position difficult for the molding material to reach; and an ejecting assembly including at least one lower ejecting unit, said lower ejecting unit being configured as an ejecting tube that is disposed movably within said guide hole and that has an ejecting end, said ejecting tube being communicated with said mold cavity and said lower air chamber such that the pneumatic device is operable to draw air from said mold cavity into said ejecting tube so as to facilitate flow of the molding material to cause the molding material to contact said molding surfaces when the molding material is fed into said mold cavity, said ejecting tube being operable to move within said guide hole between a retracted position whereat said ejecting end of said ejecting tube is disposed outwardly of said mold cavity, and an ejecting position whereat said ejecting end of said ejecting tube is moved into said mold cavity so as to remove a molded product from said lower mold unit when said upper mold unit is removed from said lower mold unit, the pneumatic device being also operable to introduce compressed air therefrom into said mold cavity via said lower air chamber and said ejecting tube so as to facilitate removal of the molded product from said lower mold unit; wherein said ejecting tube includes: a rigid tube body having an axial central hole that is formed therethrough and that has a threaded hole portion; and an end piece having an externally threaded section engaging said threaded hole portion of said central hole in said tube body, and an exposed section formed integrally with said externally threaded section and disposed outwardly of said tube body, said exposed section being formed with at least one slit formed therethrough along axial and radial directions thereof so as to divide said exposed section into a plurality of pivotable portions, said pivotable portions having free ends that constitute said ejecting end and that are moved away from each other such that a rate of which the compressed air flows into said mold cavity through said end piece is increased when the compressed air is introduced into said mold cavity by the pneumatic device.