Tel: 0086-373-5471699
Fax: +86-373-5471026
Email: info@huahangfilter.com
Address: Industrial Park, Dazhaoying Town,Xinxiang City ,Henan Province ,China
Melt filters are used for continuous filtration of polymer melts, removing impurities and unmelted particles from the melt, improving the spinning performance of the melt, and ensuring spinning quality. Melt filters are indispensable equipment in high-speed spinning and fine denier spinning, playing a significant role in extending the lifespan of spinning components, improving equipment utilization, and increasing production.
Working Principle:
In the production of spunbond nonwoven fabrics, in order to ensure the smooth spinning process and reduce the occurrence of breakage, dripping, and other phenomena, two sets of filtration devices are generally installed. The first filter (coarse filter) is installed between the screw extruder and the metering pump, and its main function is to filter out larger impurities, extend the service time of the second filter device, protect the metering pump and spinning pump, increase the back pressure of the extruder, and help with the exhaust and plasticizing effects during material compression. The second filter (precision filtration) is installed in the spinning component, mainly to filter out finer impurities, crystal points, etc., prevent clogging of the spinneret, ensure smooth spinning, and improve fiber quality. The shape of the filter depends on the size of the spinneret, and is generally a multi-layer rectangular filter.
Structure:
1. Filter chamber. There are two cylindrical filter chambers, each equipped with a set of 17 filter elements, with a filtration area of 65 square feet (equivalent to 6m2), which is the main indicator of filter specifications. During the production process, two filter chambers are used and one is standby.
2. Diverter valve. There are two FD sliding tube axial valves in total, with an insulation sleeve on the valve body and an operating panel on the valve body. The design is quite reasonable, and there are no dead corners in the melt during switching.
3. Exhaust valve. Installed on the upper part of the diverter valve. There is a discharge valve at the bottom, which facilitates the elimination of internal gas during switching and the discharge of materials during disassembly and cleaning, making it easy to lift.
4. Both filter chambers are equipped with external jackets. The inner part of the outer jacket is heated and insulated with biphenyl vapor for the filter chamber, and there is also an insulation layer on the periphery.
5. Filter element. The filter element is a rod-shaped structure made by sintering five layers of metal wire mesh. The center of the rod is a reinforced skeleton with a diameter of 3mm, which bears the pressure during filtration. The initial pressure used for the filter element is 2.156 × 106Pa, and the pressure during switching is 8.33 × 106Pa. There are several types of filter elements, including X6, X7, X11, X12, etc., with mesh sizes ranging from 20 μ M to 40 μ M is not equal. The aperture of the mesh is the filtration accuracy of the filter element.
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