THEORETICAL CONSIDERATION ON THE ABRASIVE WATER-MIXING CHAMBER MADE BY THE PLA MATERIAL WITH 3D PRINTING PROCESS BY FDM TYPE

Abstract

Made functional prototype with 3D printing technology is an important part to reduce the weight of the inertial force in CNC abrasive water jet machine. 3D printing by FDM deposit of thermoplastic material in layers it is relative new and modern process. The main advantage of 3D printing is that it is possible to made complex construction parts where difficult of the assembly or processing of the parts is not necessary, but at the same time, the assurance of positioning and precision are ensured directly by the technological printing process. The process applied for production of non-metallic or metallic particles in suspension for made parts. An experiment employing PETG material used for the generated of a mixing chamber for abrasive water jet installation. The generation parameters considered the roughness of the material on the abrasive surface contact surface for a thickness of 0.4 mm of printed wire and an infill of 0.1 mm for the layer. The construction of the mixing chamber is different from the usual existing mixing chamber on processing installation. This to optimize both the mixture of the abrasive and particles with water, but also to distribute equal the particles of abrasive material on the periphery of the active jet in the working installation. In the process of generating the mixing chamber, different material densities used to optimize the mechanical strength of areas where mechanical or hydraulic contact stresses occur. Future research directed towards to fabrication of the mixing chamber with metallic particles embedded in the plastic mass of the type PETG, ABS or PC.