Patent ID: 8251690

Claim:
A mold assembly, comprising: a die block comprising: a top surface defining a cavity and at least two threaded holes; a first side surface; and a second side surface opposite to the first side surface; wherein the die block defines a first guiding slot and a second guiding slot, and both the first guiding slot and the second guiding slot extend from the first side surface to the second side surface and are communicated with the cavity; and a core received in the cavity, and comprising: a first outer side surface; and a second outer side surface opposite to the first outer side surface, wherein the first outer side surface defines a third guiding slot aligned with the first guiding slot, and the second outer side surface defines a fourth guiding slot aligned with the second guiding slot; and a first and a second fixing bolts and at least two screw bolts, wherein the first fixing bolt is received in the first and the third guiding slots, the second fixing bolt is received in the second and the fourth guiding slots, the at least two screw bolts respectively engage in the at least two threaded holes of the die block, and ends of the at least two screw bolts abutting against the first and second fixing bolts to firmly support the core in the cavity.