Stack forming apparatus and manufacturing method of stack formation

1. A stack forming apparatus comprising:

a first nozzle provided with a first injection hole, configured to mix a first material and a second material into a first mixed material, to inject the first mixed material to a target, and to apply laser light to the injected first mixed material to melt the injected material, the second material being a different kind of material from the first material;

a second nozzle provided with a second injection hole having a diameter different from a diameter of the first injection hole, configured to mix the first material and the second material into a second mixed material, to inject the second mixed material to the target, and to apply laser light to the injected second mixed material to melt the injected second mixed material;

a light source configured to apply the laser light to the first nozzle and the second nozzle; and

a controller configured to control a ratio and amounts of the first material and the second material to be supplied to the first nozzle and the second nozzle.

2. The stack forming apparatus according to claim 1 , further comprising a melting device which remelts one or both the first material and the second material attached to the target.

3. The stack forming apparatus according to claim 1 , comprising

a measurement device which measures the shapes of the target consisting of one or both of the first material and the second material; and

a removing device configured to partly remove the target in accordance with a measurement result by the measurement device.

4. The stack forming apparatus according to claim 3 , comprising a storage unit in which the shape of a stack formation to be formed on the target is stored as a threshold,

wherein the controller compares the shape measured by the measurement device with the threshold, and uses the removing device to remove a part of the shape different from the threshold.