Patent ID: 7351055

Claim:
An injection molding machine comprising: a base; a mold clamping mechanism arranged on said base and including a stationary platen, a rear platen, tie bars connecting said stationary platen and said rear platen, and a movable platen arranged movable close to and apart from said stationary platen along said tie bars, so that a mold is clamped between said stationary platen and said movable platen; and an injection cylinder having a nozzle at an end thereof and arranged movable along an injection axis so that the nozzle is brought into contact with and pressed against a sprue of the mold clamped by said mold clamping mechanism in performing an injection operation, wherein said base has a groove along the injection axis to form ridges at opposite sides of the groove, and said stationary platen has a pair of protrusions on lateral sides thereof, a lower portion of said stationary platen under the protrusions is inserted into the groove, and bottom surfaces of the protrusions are fixed on top surfaces of the ridges.