Patent ID: 6024560
Filing Date: 2000-02-15
Classification: B29C

Abstract:
An injection molding machine having a frame, comprising:a stationary platen fixed to the machine frame of the injection molding machine;a plurality of tie bars having respective second ends being fixed to said stationary platen;a rear platen fixed to respective first ends of each of said plurality of tie bars;a moving platen arranged between said stationary platen and said rear platen with said plurality of tie bars passing through through holes formed in said moving platen allowing said plurality of tie bars to pass therethrough;an injection unit arranged on a side of said rear platen not opposed to said moving platen;a plurality of guide rods having respective first ends fixed to said injection unit;a moving mold and a stationary mold which are mounted opposite to each other on said moving platen and said stationary platen, respectively, wherein respective second ends of said guide rods are fixed to a surface of said moving platen on which said moving mold is not mounted;a toggle mold clamping mechanism arranged between said rear platen and said moving platen and provided with a crosshead having through holes allowing said guide rods to pass therethrough, said guide rode respectively passing through the through holes of the crosshead; andan injection cylinder passing through a through hole formed in a center of said rear platen, a gap formed in a center of said toggle mold clamping mechanism and a through hole formed in a center of said moving platen, whereinthe crosshead of said toggle mold clamping mechanism moves in a straight line, guided by said guide rods, in response to driving the crosshead so that said moving platen and said injection unit coupled to said moving platen by means of said guide rods, move toward or away from said stationary platen.