Degreasing System of Vacuum Sintering Furnace
Oct 18,2024
Vacuum sintering furnaces, after careful cleaning of polymer adhesive residues in the hot zone, shall continuously and effectively process and filter the process gas containing adhesive to prevent adhesive accumulation on pipes, valves or pumps. Next, let me introduce the vacuum sintering furnace degreasing system.
In order to maintain continuous production and low maintenance costs, it is considered to protect the main structural components by an effective adhesive collection system. The separation of air flow and adhesive can be achieved on modern vacuum sintering furnaces. The powerful vacuum pump realizes the hot zone vacuum composed of the Roots pump supported by the machine pump. The high-temperature and high-rate process gas carries the saturated evaporated polymer material and is extracted through the exhaust pipe at the bottom of the vacuum furnace shell. When the airflow changes direction under the influence of the cooling pipe wall, it suddenly drops and cools down, and part of the gas binder recondenses instantly. Thus, up to 20% to 25% of the adhesive material has been deposited on the pipe and can clog the pipe. In order to avoid manual maintenance, the necessary cleaning process is automatically performed by an electric extruder (piston) and the sediment is squeezed out of the pipe.
The vacuum sintering furnace can improve adhesive condensation and subsequent removal according to the cooling and heating sequence. The water cooling support of the double wall pipe can improve the condensation effect of the adhesive material, but the condensate may solidify faster. Thus, the heating coil wrapped around the pipe helps the glue layer to re-soften before the electric extruder is operated.
After the vacuum sintering furnace passes through the horizontal pipe, the air still contains about 75% binder contamination. A special filtration system (pump transfer) is connected upstream to ensure that additional cleaning procedures are carried out smoothly, thereby protecting important and valuable structural components from damage. Depending on the binder used and the personalization program parameters, something different from the traditional filtration concept may be effective. The easy-to-clean filter is the working principle of the filter system, which greatly shortens the maintenance time. It has a four-stage dirt interception system: using a large surface area to capture heavy particles, condensed volatile solids and liquids. The adhesive is gradually filtered through a wire mesh installed in a specific location. Used to capture gas particles that may be missing in the first few steps. The modular system has a heating function, which can dissolve the captured adhesive and collect it in a bucket that is easy to remove and clean.
Even if the risk of contamination of the vacuum pump is small, long-term adhesive deposits such as blades and housings can work 24h for 7 days without interruption. In order to maintain large vacuum performance, keep the fast rotating parts installed at small intervals clean. The innovative idea of vacuum pump cleaning procedure based on software control was tested on the new IPSON vacuum sintering furnace. A liquid solvent is injected into the vacuum system to dissolve the cured polymer adhesive. The speed of the blade or propeller can be adjusted by the variable frequency drive to ensure effective erosion of the deposited polymer. To enhance the efficiency of the cleaning process, the solvent is heated to a temperature close to its boiling point. Modern vacuum furnaces with innovative degreasing and process management system solutions will help the vacuum sintering furnace industry to further increase its competitiveness. For economic success, the investment and operating costs of these professional vacuum sintering furnaces are kept within reasonable limits. This is the vacuum sintering furnace degreasing system that I introduce to you. If you need to know more, please feel free to contact us!
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