Injection molding apparatus and injection molding method

An injection molding apparatus for a fiber reinforced resin comprising:

• a cylinder in which a discharge nozzle is formed on a front side;
• a screw that is provided rotatably and movably in a rotation axis direction in an inner portion of the cylinder;
• a resin feed section that feeds a resin raw material into the cylinder;
• and
• a fiber feed section that is provided ahead of the resin feed section and feeds reinforcing fibers into the cylinder,
• wherein the screw includes
• a first stage that is located on a rear side, and in which the resin raw material is melted, and
• a second stage that is located on the front side and is connected to the first stage, and in which the melted resin raw material and the reinforcing fibers are mixed, and
• a lead L2 of a second flight provided in the second stage is larger than a lead L1 of a first flight provided in the first stage at least in a fiber receiving region where the reinforcing fibers are fed from the fiber feed section.