Multi-mold block drive device and injection molding machine having the multi-mold block drive device

An injection molding machine, comprising:

• a machine base;
• a feeding unit mounted on said machine base for feeding a linear material, and including a plurality of pull wheel assemblies spaced apart from each other along an axis, and a motor for driving said pull wheel assemblies;
• a material feed backflow prevention device mounted on said machine base and located on a side of said feeding unit for preventing backflow of the linear material during feeding;
• a multi-mold block drive device mounted on said machine base and located at a material discharge end of said material feed backflow prevention device, said multi-mold block drive device being suitable for driving a plurality of mold blocks, and including a guide seat including an inner peripheral surface surrounding an axis and defining a mold hole, an outer peripheral surface opposite to said inner peripheral surface, a plurality of spaced-apart mold grooves formed in said inner peripheral surface and communicating with said mold hole, and a plurality of spaced-apart guide holes each of which extends through said outer peripheral surface along a central line transverse to the axis and communicates with a respective one of said mold grooves,
• a plurality of speed reduction drive units that are disposed spaced apart from said outer peripheral surface, that are positioned relative to said guide seat, and that correspond respectively to said guide holes, each of said speed reduction drive units including a servo motor, and a speed reducer driven by said servo motor, said speed reducer including an eccentric shaft disposed eccentrically and capable of outputting rotational force, and
• a plurality of mold locking units each connected between one of said guide holes and a corresponding one of said speed reduction drive units, each of said mold locking units including a pivot shaft that is fixed relative to said guide seat and that is located outwardly of a corresponding one of said guide holes, a linkage pivoted to said pivot shaft, and a guide rod pivoted to said linkage, said linkage including a crank driven by said eccentric shaft, a first link arm pivoted between said crank and said pivot shaft, and a second link arm pivoted between said crank and said guide rod, wherein, when said linkage of each of said mold locking units is driven by the corresponding one of said speed reduction drive units, said linkage will in turn drive said guide rod to move linearly along the central line;
• and
• a pair of molds that are disposed in two opposite ones of said mold grooves, that are located at a material discharge end of said material feed backflow prevention device, and that are capable of receiving a flowable raw material extruded from said material discharge end, said pair of molds being configured to be clamped and locked by the mold blocks when the mold blocks are driven by said multi-mold block drive device to move toward each other.