Screen sintering furnace and method for screen sintering by using such furnace

A technology of sintering furnace and wire mesh, applied in the direction of furnace, muffle furnace, cooking furnace, etc., can solve the problems of increasing production cost, wasting isolation layer, increasing cleaning process, etc., and achieve the effect of high strength of the finished product

Active Publication Date: 2013-04-03
河北新特过滤技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The use of current sintering furnaces to sinter metal mesh has the following defects: one, the use of sintering, cold rolling, re-sintering or multiple cycles increases energy consumption and reduces work efficiency, thereby increasing production costs; , before sintering, an isolation layer is placed between each sintering network. After each firing, the isolation layer needs to be cleaned, and a new isolation layer is laid before the next sintering, which not only wastes the isolation layer, but also increases The cleaning process is reduced, which reduces the work efficiency; third, in the process of multiple sintering and cold rolling, it is easy to cause damage to the stainless steel material, making the filtration accuracy of the sintered mesh uneven

Method used

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  • Screen sintering furnace and method for screen sintering by using such furnace
  • Screen sintering furnace and method for screen sintering by using such furnace
  • Screen sintering furnace and method for screen sintering by using such furnace

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The first step is to prepare materials

[0060] Stack the multi-layer meshes to be sintered neatly in the order of the process requirements, and fix the four corners together by spot welding to make a sintered mesh;

[0061] The second step is to arrange the net

[0062] Put multiple sintering nets one by one on the material pallet, with an isolation layer between each sintering net, place a material pressing plate on the top of the sintering net, and put the stacked material pallet, sintering net and The material pressing plate is put into the sintering furnace;

[0063] The third step is to vacuum

[0064] Vacuum the sintering furnace so that the pressure in the sintering furnace is 1.3×10 -3 Pa;

[0065] The fourth step, heating up

[0066] Heating by the heating device. When the temperature in the sintering cavity rises to 295°C, hydrogen gas is introduced into the sintering cavity to make the pressure in the sintering cavity at 39 Pa. Continue heating to increase the temperat...

Embodiment 2

[0082] In the third vacuum stage, the pressure in the sintering furnace is 6×10 -4 Pa;

[0083] In the fourth heating stage, when the temperature in the sintering cavity rises to 305°C, hydrogen gas is introduced into the sintering cavity to make the pressure in the sintering cavity 41Pa, and heating is continued to increase the temperature in the sintering cavity to 1200 ℃;

[0084] In the fifth step of pressurization, the pressure at the sintering network is 1.5 kg / cm²;

[0085] In the heat preservation stage of the sixth step, keep the pressure and temperature for 4 hours;

[0086] In the seventh step, the temperature is naturally lowered and the pressure is removed, and the temperature is slowly lowered to 1120°C;

[0087] In the eighth step heat preservation stage, keep heat preservation for 1 hour;

[0088] In the ninth step, the rapid cooling stage, the pressure of the cooling gas introduced is 2 standard atmospheres, and the temperature rapidly drops to 310°C within 12 minutes; ...

Embodiment 3

[0092] In the third vacuum stage, the pressure in the sintering furnace is 6×10 -4 Pa;

[0093] In the fourth heating stage, when the temperature in the sintering cavity rises to 298°C, hydrogen gas is introduced into the sintering cavity to make the pressure in the sintering cavity 39.5 Pa, and heating continues to increase the temperature in the sintering cavity to 1260°C;

[0094] In the fifth step of pressurization, the pressure at the sintering network is 0.85 kg / cm²;

[0095] In the heat preservation stage of the sixth step, keep the pressure and temperature for 7 hours;

[0096] In the seventh step, the temperature is naturally lowered and the pressure is removed, and the temperature is slowly lowered to 1090°C;

[0097] In the eighth step heat preservation stage, keep heat preservation for 1.4 hours;

[0098] In the ninth step, the rapid cooling stage, the pressure of the cooling gas introduced is 1.9 standard atmospheres, and the temperature quickly drops to 300°C within 9 minu...

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Abstract

The invention belongs to the technical field of screen sintering, and particularly discloses a screen sintering furnace and a method for screen sintering by using such furnace. According to the technical scheme provided by the invention, the screen sintering furnace comprises a furnace body consisting of a furnace wall and a furnace chamber, wherein a hydraulic mechanism is arranged above the furnace body; a first through hole is formed on the furnace wall; a second through hole is formed at a position corresponding to the first through hole above the sintering chamber; a hydraulic ejector rod of the hydraulic mechanism penetrates through the first through hole and the second through hole; and the hydraulic ejector rod comprises a heat-resistant ejector rod at the top end and a metal supporting rod behind the heat-resistant ejector rod. At the time of sintering, the pressure between meshes in a sintering net is increased, so that one-time sintering formation is realized; compared withsintering, cold rolling, resintering or multiple circulation adopted in the conventional process, the energy consumption is reduced, the production cost is reduced, an isolating layer is saved, a cleaning process is saved, and the working efficiency is increased; and the problem of damage caused to a stainless steel material is reduced, so that the filtering accuracy of a sintering screen is moreuniform.

Description

Technical field [0001] The invention belongs to the technical field of wire mesh sintering, and particularly relates to a wire mesh sintering furnace and a method for using the furnace to perform wire mesh sintering. Background technique [0002] The sintered mesh is a new type of filter material with high strength and overall rigidity, which is made of a multi-layer metal wire mesh through a special laminated layer and sintered in a vacuum furnace. It overcomes the low strength, poor rigidity, and mesh of the metal wire mesh. The hole is easy to deform and unstable. It is widely used in petroleum, chemical, energy, aviation, aerospace, safety, environmental protection, medicine, power and other fields. [0003] The main equipment used for wire mesh sintering is the wire mesh sintering furnace. The currently used wire mesh sintering furnace is first vacuumed and then sintered at a high temperature. Due to the few contact points of each mesh, during the first high-temperature sinte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27B5/05F27B5/06
Inventor 曹郡学张子超
Owner 河北新特过滤技术有限公司
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