3D printing device, 3D printing method and 3D tubular objects obtained by said method

3D printing device, for manufacturing at least one 3D tubular object according to a printing model;

• said 3D printing device comprising:
• a build platform having an external surface;
• resin providing means, configured to provide, on said external surface of said build platform, a fluid resin which is polymerizable by electromagnetic radiation;
• an electromagnetic radiation source, configured to emit, from a source output to said external surface of said build platform, a beam of an electromagnetic radiation suitable for polymerizing said fluid resin;
• beam positioning means, configured to variably position an impinging point of said beam on said fluid resin provided on said external surface by at least:
• a circumferential positioning in a circumferential direction around said longitudinal axis;
• a longitudinal positioning along a longitudinal direction defined by said longitudinal axis;
• and
• a distance positioning between said source output and said tubular shaped surface of said stem, thereby defining a beam length;
• and
• control means, configured to control said beam positioning means and said electromagnetic radiation source according to said printing model to manufacture said 3D tubular object;
• wherein said build platform comprises a stem having a longitudinal axis, said stem forming a tubular shaped surface around said longitudinal axis, so that said external surface of said build platform is comprised in said tubular shaped surface, and wherein said beam positioning means is configured to variably position said impinging point of said beam on different points of at least one part of said fluid resin provided on said tubular shaped surface.