Merging raw files into a single binary file


I am trying to import 3d *.RAW files into ImageJ, merge them and export them to one single binary file format (the ultimate goal is to a single .bin file format). Each raw file corresponds to a voxelized object ( exported from BINVOX) to build 3D modeling. Each object has its own coordinates; it is essential to preserve its coordinate to construct the model accurately.

Please, help me!