Device and a method for 3D printing and manufacturing of materials using quantum cascade lasers
A 3D printer device utilizing at least one Quantum Cascade Laser (QCL) image head having at least one beam focused in a focal plane of the device for building on a surface of the device a 3D model of a target object from a digital image. The inventive 3D printer is more compact in size due to the use of QCL image heads, which provides focused wavelengths of QCLs matching the absorption properties in plastics for more efficient absorption of the radiant energy. Each QCL channel power in the inventive 3D printer can be doubled by combining two lasers with a polarization beam splitter. The QCL image head is provided with Pulse Width Modulation (PWM) for compensating for imaging speed. The invention includes a method for scaling up the building speed of 3D printing regardless of detail level. The invention discloses an affordable 3D printer using QCL technology while maintaining high standards of resolution, use of quality materials, and rapid building speeds.
1. A method for fabricating a 3D object, said method comprising:
directing a quantum cascade laser (QCL) beam to at least one predetermined region of a layer of a first material positioned in the pathway of the beam, to sinter or melt said first material in said at least one predetermined region, to form a first cross-section of said object;
forming a layer of a further material on said first cross-section and directing a QCL beam to at least one predetermined region of said layer of the further material, to sinter or melt said further material in said at least one predetermined region to form a further cross-section of said object;
forming one or more material layers, each being successively sintered or melted by QCL to form stacked cross-sections of said object;
wherein the QCL beam is programmable or engineered to operate at a wavelength selected to match the absorption spectrum of said first and further materials;
to thereby successively fabricate the 3D object.
2. The method according to claim 1 , wherein said first and further materials are independently selected from the group consisting of thermoplastic and thermosetting materials.
3. The method according to claim 2 , wherein said first and further materials are selected from thermoplastic materials.
4. The method according to claim 1 , wherein said first and further materials are powders.
5. The method according to claim 4 , further comprising pre-heating said first and further powder materials.
6. The method according to claim 1 , wherein said first and further materials are selected from the group consisting of Nylon (Polyamide), PET, polyimide, polyurethane, acrylonitrile butadiene styrene (ABS), acrylic (PMMA), polyester, polyethylene (PE), polypropylene (PP), polyvinyl acetate (PVA), polystyrene (PS) and polyvinyl chloride (PVC).
7. The method according to claim 1 , wherein said QCL is operable in 3D raster mode.
8. The method according to claim 1 , wherein said QCL is utilized in combination with an inkjet.
9. The method according to claim 1 , wherein said QCL beam is emitted from one or more QCL image heads.
10. The method according to claim 1 , wherein said one or more QCL image heads utilizes Pulse Width Modulation (PWM).
11. The method according to claim 1 , wherein said one or more QCL image heads provides for simultaneous writing with more than one wavelength.
12. The method according to claim 1 , further comprising removing uncured material to expose the 3D object.
13. The method according to claim 1 , utilizing a QCL image head having at least one beam focused in a focal plane of said material layers.
14. The method according to claim 1 , further comprising providing means for feeding said first and further materials in successive layers.