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Manufacturing method of filter panel

A manufacturing method and filter plate technology, applied in the direction of filtration and separation, separation methods, chemical instruments and methods, etc., can solve the problems that the non-filter layer is not strong enough, the surface is prone to fracture, leakage, etc., and achieve shortening of heating and sintering time, powder The material is dense and the effect of increasing thermal conductivity

Inactive Publication Date: 2014-11-05
TIANJIN LIDAFENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For single-sided filter plates, since the overall sintering temperature of the filter plate is the same, if the sintering temperature is too high, it will affect the number of filter holes in the filter layer, and if the sintering temperature is too low, the non-filter layer will not be strong enough, and the surface is prone to breakage, resulting in Unfiltered leakage, affecting use

Method used

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  • Manufacturing method of filter panel

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Effect test

Embodiment 1

[0011] The steel mold is divided into an upper mold, a middle mold and a lower mold. First, the inner wall of the mold is evenly sprayed with a release agent, and then the lower mold and the middle mold are combined to make them into one; the prepared ultra-high molecular polyethylene powder Preheat the material, the preheating temperature is 40-70°C, and the preheating time is 3-20 minutes, then fill it into the lower mold and the middle mold, shake the mold after filling, and compact the powder in the mold with a flat plate, Refill if necessary, cover the upper mold, and close the mold; put the steel mold with powder on the heating table of the flat vulcanizer or mold temperature machine, pressurize to 0.5-10MPa, then heat and sinter, and sinter The process adopts curve gradient heating or cooling. The sintering temperature of the upper surface of the steel mold is 120°C-280°C, the sintering temperature of the lower surface is 140°C-290°C, the sintering temperature of the sid...

Embodiment 2

[0013] The steel mold is divided into an upper mold, a middle mold and a lower mold. First, the inner wall of the mold is evenly sprayed with a release agent, and then the lower mold and the middle mold are combined to make them into one; the prepared ultra-high molecular polyethylene powder Preheat the material, the preheating temperature is 40-70°C, and the preheating time is 3-20 minutes, then fill it into the lower mold and the middle mold, shake the mold after filling, and compact the powder in the mold with a flat plate, Refill if necessary, cover the upper mold, and close the mold; put the steel mold with powder on the heating table of the flat vulcanizer or mold temperature machine, pressurize to 0.5-10MPa, then heat and sinter, and sinter The process adopts curve gradient heating or cooling. The sintering temperature of the upper surface, lower surface and side of the steel mold is 120°C-280°C, and the sintering time is 2-8 hours; after 1-8 hours of curve gradient cool...

Embodiment 3

[0015] The steel mold is divided into an upper mold, a middle mold and a lower mold. First, the inner wall of the mold is evenly sprayed with a release agent, and then the lower mold and the middle mold are combined to make them into one; the prepared PTFE powder Preheating, the preheating temperature is 40-70°C, the preheating time is 3-20 minutes, then fill in the lower mold and the middle mold, shake the mold after filling, and compact the powder in the mold with a flat plate, if necessary Refill the material, cover the upper mold, and close the mold; put the steel mold with powder on the heating table of the flat vulcanizer or mold temperature machine, pressurize to 0.5-10MPa, and then heat and sinter, the sintering process Using curve gradient heating or cooling, the sintering temperature of the upper surface of the steel mold is 150°C-280°C, the sintering temperature of the lower surface is 170°C-290°C, the sintering temperature of the side is 170°C-290°C, and the sinteri...

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Abstract

The invention provides a manufacturing method of a filter panel with good sintering effect, wherein a one-side filter panel and a double-face filter panel can both be sintered. The manufacturing method is characterized by comprising steps of concussion, compacting, sintering and cooling. During the material compacting, the air in a powder material can be eliminated to the maximum such that the powder material is dense, heat conductivity is increased and heat sintering time is shortened. A supplementary material is used to fill the missing part caused by material compacting and can make the sintered filter panel plump. By the adoption of different heating temperatures at different positions inside, a flat vulcanizer and a die heater can be used to heat and sinter a steel die filled with an ultrahigh molecular material. The temperatures of the upper surface, lower surface and side surface of the steel die are different. The filter panel inside the steel die can be made into a one-side filter panel or a double-face filter panel. The sintering temperature of a non-filtering layer can be very high. Therefore, the filter panel becomes stronger, can bear stronger pressure and will not be broken.

Description

technical field [0001] The invention relates to a sintering process, in particular to a method for manufacturing a filter plate. Background technique [0002] Filter plate is a commonly used filter device, which is mostly used for solid-liquid separation. It is matched with plate and frame filter press, and can also be used for gas purification and electrostatic spraying. The filter plate is widely used in filter equipment because of its high filtration precision, good permeability, acid, alkali, salt, solvent, non-toxic and non-polluting characteristics. There are generally two methods for the manufacture of filter plates. The first is the bonding method, which is mostly used for ceramic filter plates, such as a double-sided filter plate-shaped microporous ceramic and its manufacturing method disclosed in the invention patent CN 101480544A. The production process of this method is relatively cumbersome, and due to the use of adhesives, sometimes uneven use of adhesives oc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/16
Inventor 陈庆民杜秀艳
Owner TIANJIN LIDAFENG TECH
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