Patent ID: 7950915

Claim:
A plastics injection molding machine with an injection unit ( 1 ), comprising an injection unit housing ( 2 ), a plasticizing cylinder ( 4 ) connected to the injection unit housing ( 2 ), a screw ( 5 ) which is supported in the plasticizing cylinder ( 4 ) for rotation to prepare injection material and for displacement to effect an injection stroke in axial direction, drive motors ( 10 , 11 ) coupled to and generating a rotation and axial movements of the screw ( 5 ) and supported on the injection unit housing ( 2 ) via a motor flange ( 12 ), and an injection force measuring device ( 17 ) for determining an injection force (S) applied by the screw ( 5 ) when executing its injection stroke, wherein the injection force measuring device ( 17 ) includes at least one tensile force sensor ( 16 ) which is integrated in the injection unit housing ( 2 ) in such a manner that a reaction force (R) of the injection force, as generated by the injection force (S) and introduced via the motors ( 10 , 11 ) and the motor flange ( 12 ) into the injection unit housing ( 2 ), is detectable, and wherein the at least one tensile force sensor ( 16 ) is arranged in a recess ( 15 ) of the injection unit housing ( 2 ) and placed in relation to the recess ( 15 ) in force-transmission with marginal zones ( 21 , 26 ) of the injection unit housing ( 2 ), which extend transversely to the reaction force (R).