Key Components of Vacuum Sintering Furnace
Oct 18,2024
The vacuum sintering furnace accumulates into surrounding parts (such as exhaust pipes, pumps, hot zones) to different degrees depending on the weight and residual polymer content of the sintered parts. Therefore, long downtime may occur for manual cleaning and daily maintenance. If the net weight of the material is 400kg (furnace volume greater than 1000L) and the binder content is 3% 14%, 15kg of polymer will be removed in the degassing stage. Nevertheless, most of the discharged gas (above 95%) is collected at a specific condensation point (e. g. adhesive collector or wax separator). Due to clean-up pollution and manual clean-up, the door-to-door cycle time will increase by more than 2 hours. In this way, an inefficient, poorly designed vacuum sintering furnace can reduce operating performance by 15%. Vacuum sintering furnace manufacturers consider advanced equipment equipped with an automatic cycle cleaning system to reduce maintenance and keep unexpected failures at a low level. Next, let me introduce to you the key components of the vacuum sintering furnace!
About 60% of the vacuum sintering furnace production material is stainless steel, the common alloy is 17-4PH and austenitic stainless steel 304L, 316L. The price of ready-made injection materials is US $30-50 (about 184-307 RMB)/kg. After molding and degreasing, the original parts of the heavy-duty road may be worth more than a few thousand dollars (about thousands or tens of thousands of yuan). In this way, the reliability of the key components of the vacuum sintering furnace is very important.
As described above, when the temperature is raised and the average heat treatment temperature reaches the 600, the gas removal process of the residual polymer binder will occur. In order to effectively deliver the gaseous material out of the hot zone, a continuous homogenous purge gas flow is required at each point within the cassette. The design of the air furnace (or puffball) reduces the size of the vacuum sintering furnace, thereby achieving external heating. The main advantage of this design is that the furnace provides a high purity atmosphere, ensuring uniform heat flow through the parts. But installing a cooling fan on the stove is not an easy task. This results in longer production cycles and bile generates more investment, maintenance and energy costs.
The infrastructure is a circular carbon steel structure (distributor) that provides uniform support for hot spots, heating components and insulation. The flat rod-like graphite heating elements completely surround the cylindrical part of the hot spot and are evenly arranged to provide good energy transmission for the working area. The heating elements attached to the front and back further improve the temperature uniformity to 3. Inside the insulation layer is multi-layer high-performance graphite felt, and the surface is CFC material. The input of the process gas can be adjusted, and the flow rate can be adjusted, which helps to maintain the differential pressure between the inside of the hot zone and the gap between the distributor and the furnace shell. Uniform process gas circulates inside and outside the hot zone to prevent uniform evaporation of the binder, prevent the binder from depositing again, and protect the hot zone from pollution.
This is the key component of the vacuum sintering furnace that I introduce to you. If you need to know more, please feel free to contact us!
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