Pressure-relief paraxial powder feed nozzle device for laser 3D (Three-dimensional) printer

• Main Authors: SHAO DONGQIANG, JI SHENGWEI
• Format: Patent
• Language: English
• Published: 22.10.2014
• Subjects: CASTING; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING; WORKING METALLIC POWDER

The utility model relates to a pressure-relief paraxial powder feed nozzle device for a laser 3D (Three-dimensional) printer. The pressure-relief paraxial powder feed nozzle device comprises a powder cylinder cavity and a nozzle which are connected into a whole, wherein an end cover is arranged on the top of the powder cylinder cavity, and a powder feed connection pipe is inserted at the axis of the end cover. The pressure-relief paraxial powder feed nozzle device is characterized in that the powder cylinder cavity comprises a straight cylinder section, a first conical surface section and a second conical surface section which are sequentially connected from top to bottom, the nozzle is in a funnel-type conical structure and comprises a funnel section and a powder spraying hole section communicated with the funnel section, a pressure relief pipe is also arranged on the end cover, the powder feed connection pipe is inserted into the straight cylinder section of the powder cylinder cavity and a plurality of pressure-relief baffles are horizontally fixed on the powder feed connection pipe. The pressure-relief paraxial powder feed nozzle device disclosed by the utility model has the beneficial effects that the dispersion of a powder beam is reduced, the straightness degree of the powder beam is increased, and the coincidence of pink spots and light spot is improved so that the dimensional accuracy and surface quality of a printed workpiece are greatly improved.