ADDITIVE MANUFACTURING BY INSTRUMENTED MASS EXTRUSION

• DOI: 10.22533/at.ed.3173402323113

• Palavras-chave: 3D printing, extrusion, ceramic mass, process parameters, additive manufacturing.

• Keywords: 3D printing, extrusion, ceramic mass, process parameters, additive manufacturing.

• Abstract:

  The possibility of creating physical models obtained by additive manufacturing of ceramic mass can contribute to the creative process, cost reduction, increased efficiency of the production process and market acceptance tests for assembling a portfolio. However, the formulation of masses for 3D printing must guarantee cohesion and flowability under pressure, but there is still no established procedure. Observing this opportunity, in order to allow the development of ceramic masses for printing, a three-dimensional movement device was built and tested: a printing table adapted to a universal testing machine, to operate together as an instrumented 3D printer. This device made it possible to study the influence of process parameters, such as mass extrusion speed and movement in the x, y and z axes of the printing table. To this end, force curves were obtained to print the mass versus displacement of the piston in the extrusion. The ceramic mass used was commercial soda earthenware from the company CERMASSA / PASTACER (Campo Largo - PR). The mass for printing has a solid concentration of 73% by mass and plasticity between 3 and 3.4. The extrusion speeds with the best results were 10 and 15% higher than the table movement speed. After sintering, the 2D (one layer) and 3D (three layers) specimens showed good adhesion between the layers and the lowest warpage was obtained when printing in three layers.