Abstract: An injection mold for insert molding includes a stationary plate, a first core and a second core. The stationary plate defines an upper surface and a side surface perpendicular to the upper surface. The upper surface has a slot at a middle portion thereof. The slot extends perpendicular to the side surface and reaches the side surface. The first core is received in the slot of the stationary plate and defines a holding element on a top surface thereof for securing an insert. The second core is closed with the first core to form a mold cavity, with the insert extending into the mold cavity. The first core is capable of being taken off from the slot of the stationary plate when the first core and the second core are detached from each other.

Abstract: A mold structure has a first die, and a second die. A first buckling element is protruded downwardly from the first die, and defines a first contact surface and a bottom surface. The bottom surface has an end adjacent to the first contact surface protruded downwards to form a jamming portion, and the other end protruded downwards to form a blocking portion spaced away from and beyond the jamming portion. The jamming portion has a triangle cross-section, with a point facing downwardly and away from the blocking portion. A second buckling element is extended upwards from the second die, and has a gap at a top end thereof and passing through a side thereof. The gap defines a second contact surface, corresponding to the first contact surface, and an inclining surface, intersecting with the second contact surface with an acute angle formed therebetween for engaging with the jamming portion.