How to print some Lego accessories with a 3D printer?

The 3D printing technology for printing metal is generally SLS.

SLS process, also known as selective laser sintering, was successfully developed by C.R.Dechard of the University of Texas at Austin in 1989.

The process of selective laser sintering is to lay the metal powder flat, and the control system controls the laser beam to scan the powder according to the cross-sectional profile of the layer, so that the temperature of the powder rises to the melting point and it is sintered and bonded with the parts formed below. When the sintering of one layer is completed, the workbench reduces the thickness of one layer, the paving roller spreads a layer of uniform and dense powder on it, and then a new section is sintered until the whole model is completed.