Patent ID: 8272864

Claim:
An injection mold having pre-heating device, comprising: a male die; a female die having a die cavity facing to the male die; and a pre-heating device disposed on a top surface of the female die, and comprising: a high frequency coil member for introducing electromagnetic induction; and a transportation device, comprising: a fixed rack securely disposed on the top surface of the female die, and having a Z axle servo motor installed on the fixed rack, a first Z axle linear sliding rail installed on the fixed rack, and an annular transportation belt connected to the Z axle servo motor so as to be driven by the operation of the Z axle servo motor; and a lifting rack comprising: a rack member coupled to the annular transportation belt, horizontally extending from one side of the fixed rack with one end thereof to be configured over the die cavity, and having a second Z axle linear sliding rail coupled to the annular transportation belt and moveably connected to the first Z axle linear sliding rail with the other end thereof; an X axle servo motor disposed at one side of the rack member, and having an X axle ball screw; and a horizontal moving rack moveably installed on the X axle ball screw and hanging the high frequency coil member, wherein when the Z axle servo motor drives the annular transportation belt to operate, the lifting rack is driven by the annular transportation belt to perform a vertically ascent or descent movement along the first Z axle linear sliding rail so as to be moved into or out from the space between the male die and the female die, when the lifting rack is in the space between the male die and the female die, and the X axle servo motor drives the X axle ball screw to rotate, the horizontal moving rack is horizontally moved into the die cavity of the female die, the high frequency coil member is linearly moved along a horizontal direction to close to a surface of the die cavity of the female die.