Base frame for injection molding machine

A base frame used in an injection molding machine provided with a mold clamping unit including a platen, on which at least the mold clamping unit is placed and which supports the mold clamping unit, the base frame comprising:

• a pair of main beams spaced apart from each other in a width direction of the base frame and extending side by side in a longitudinal direction of the base frame;
• and
• a platen attachment plate which is disposed on the main beams and to which the platen is attached,
• wherein outer edge portions of the platen attachment plate in the longitudinal direction include welding points joined by welding to the main beams, and the platen attachment plate has a shape in which a length in the longitudinal direction is longer at an outer end than at an inside part in the width direction,
• the platen attachment plate includes two side plate members spaced apart from each other in the width direction, and
• the inside part of the platen attachment plate is an inner end of each of the side plate members in the width direction.

A base frame used in an injection molding machine provided with a mold clamping unit including a platen, on which at least the mold clamping unit is placed and which supports the mold clamping unit, the base frame comprising:

• a pair of main beams spaced apart from each other in a width direction of the base frame and extending side by side in a longitudinal direction of the base frame;
• a platen attachment plate which is disposed on the main beams by being joined by welding and to which the platen is attached;
• and
• a connecting beam extending between the pair of main beams in the width direction to interconnect the main beams on a frame installation surface side of the platen attachment plate,
• wherein the platen includes a pair of leg portions spaced apart from each other in the width direction, and
• the platen attachment plate includes a pair of platen fixing parts used for fixing to the pair of leg portions, respectively, the pair of platen fixing parts being located inside of an inside part in the longitudinal direction.

A base frame used in an injection molding machine provided with a mold clamping unit including a platen, on which at least the mold clamping unit is placed and which supports the mold clamping unit, the base frame comprising:

• a pair of main beams spaced apart from each other in a width direction of the base frame and extending side by side in a longitudinal direction of the base frame;
• and
• a platen attachment plate which is disposed on the main beams and to which the platen is attached,
• wherein outer edge portions of the platen attachment plate in the longitudinal direction include welding points joined by welding to the main beams, and the platen attachment plate has a shape in which a length in the longitudinal direction is longer at an outer end than at an inside part in the width direction,
• at least one of the outer edge portions of the platen attachment plate includes a protruding edge portion protruding outward in the longitudinal direction beyond the inside part at an outside part including the outer end in the width direction,
• the platen attachment plate includes a pair of platen fixing parts used for fixing to a pair of leg portions, respectively, the pair of platen fixing parts being located inside of an inside part in the longitudinal direction, and
• the welding points of the outer edge portions of the platen attachment plate are positioned away from the platen fixing parts at least in a vicinity of the outer ends.