The ExOne Company is expanding its collaboration with Elnik Systems, a provider of debind and sinter equipment, and DSH Technologies, a provider of debind and sinter process consulting, to improve standardization of sintering for metals 3D printed with binder jetting. The expanded collaboration will focus on improving sintering profiles for metal parts 3D printed on ExOne binder-jetting systems. Standard profiles will be based on metal type and part features, including size, mass and other geometric elements. The companies will also co-develop an easy-to-use interface that will automatically load, or allow a user to select, sintering profiles.
L&L Special Furnace Co. Inc. shipped an electric box furnace to a U.S. manufacturer of calcium-phosphate materials used for medical devices. The calcium-phosphate powder is sintered in the furnace at a temperature of approximately 2200°F (1204°C). It is held at temperature for four to eight hours. The top layer is removed after processing, leaving pure calcium-phosphate powder. The powder is then mixed with proprietary materials and made into slurry that can be applied to various appliances deployed in the medical field.
Centorr Vacuum Industries announced shipped a Sintervac AM furnace for the debind and sintering of additively manufactured parts to a leading firm in the 3D printing/additive-manufacturing industry. The 2-cubic-foot furnace is rated for operation to 2912°F (1600°C). The graphite furnace design includes robust graphite tube and block elements designed for long service life with a four-sided hot zone and integral graphite retort for excellent temperature uniformity. The retort also compartmentalizes the residual off-gassing from binder-jet materials used during part production, allowing them to be caught in the dual trapping system. The Sweepgas debind system allows for effective sweeping away of the process contaminants. Furnace control is via PLC with Centorr's custom-designed HMI visualization interface.
Lindberg/MPH shipped a 2012°F (1100°C) crucible furnace to a research-and-development laboratory in the nuclear industry. The furnace will be used for laboratory melting applications including annealing, ashing, carbon firing, ceramic firing, hardening, nitriding, normalizing, sintering, solution treating and stress relieving. It is designed for use with a variety of crucibles, including alumina, mullite, quartz and metallic.
Atmosphere thermal processing improves the properties of fabricated metals. Operations include annealing, brazing, sintering (for powdered metals, metal injection molding and additive manufacturing) and glass or ceramic-to-metal sealing.
Check out the December 2019 issue of Industrial Heating, featuring "Metal Additive Manufacturing without Melting", "Furnaces with Tungsten Heating Elements Make High Product Quality Possible", and much more.