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Method for carrying out silk screen sintering by utilizing silk screen sintering furnace

A technology of sintering furnace and wire mesh, which is applied in furnaces, muffle furnaces, cooking furnaces, etc., can solve the problems of increasing production costs, wasting isolation layers, reducing work efficiency, etc., and achieves the effect of high strength of finished products

Inactive Publication Date: 2013-01-23
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

[0005] 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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  • Method for carrying out silk screen sintering by utilizing silk screen sintering furnace
  • Method for carrying out silk screen sintering by utilizing silk screen sintering furnace
  • Method for carrying out silk screen sintering by utilizing silk screen sintering furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The first step is to prepare materials

[0061] Stack the multi-layer mesh sheets that need to be sintered neatly according to the process requirements, and fix the four corners together by spot welding to form a sintered mesh;

[0062] The second step, network

[0063] Stack multiple sintered nets layer by layer on the material pallet, with an isolation layer between each sintered net, place a material pressure plate on the top of the sintered net, and place the stacked material pallet, sintered net and The material pressing plate is loaded into the sintering furnace;

[0064] The third step is to vacuum

[0065] Vacuum the sintering furnace so that the pressure in the sintering furnace is 1.3×10 -3 Pa;

[0066] The fourth step, heating up

[0067] Heating by the heating device, when the temperature in the sintering chamber rises to 295°C, inject hydrogen into the sintering chamber to keep the pressure in the sintering chamber at 39 Pa, continue heating to raise t...

Embodiment 2

[0083] In the third step vacuum stage, the pressure in the sintering furnace is 6×10 -4 Pa;

[0084] In the fourth step of heating and heating stage, when the temperature in the sintering chamber rises to 305°C, hydrogen gas is introduced into the sintering chamber so that the pressure in the sintering chamber is at 41 Pa, and the temperature in the sintering chamber is raised to 1200 by continuing heating. ℃;

[0085] In the fifth step of pressurization, the pressure at the sintering network is 1.5 kg / cm2;

[0086] In the sixth step insulation stage, keep pressure and temperature for 4 hours;

[0087] In the seventh step, the temperature is naturally lowered and the pressure is removed, and the temperature is slowly lowered to 1120°C;

[0088] In the eighth step heat preservation stage, continue heat preservation for 1 hour;

[0089] In the ninth step, the rapid cooling stage, the pressure of the cooling gas introduced is 2 standard atmospheres, and the temperature drops ...

Embodiment 3

[0093] In the third step vacuum stage, the pressure in the sintering furnace is 6×10 -4 Pa;

[0094] In the fourth step of heating and heating stage, when the temperature in the sintering chamber rises to 298°C, hydrogen gas is introduced into the sintering chamber so that the pressure in the sintering chamber is at 39.5 Pa, and the temperature in the sintering chamber is raised to 1260°C;

[0095] In the fifth step of pressurization, the pressure at the sintering network is 0.85 kg / cm2;

[0096] In the sixth step insulation stage, keep the pressure and temperature for 7 hours;

[0097] In the seventh step, the temperature is naturally lowered and the pressure is removed, and the temperature is slowly lowered to 1090°C;

[0098] In the eighth step heat preservation stage, continue heat preservation for 1.4 hours;

[0099] In the ninth step, in the rapid cooling stage, the pressure of the cooling gas introduced is 1.9 standard atmospheres, and the temperature drops rapidly ...

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Abstract

The invention belongs to the technical field of silk screen sintering and particularly discloses a silk screen sintering furnace and a method for carrying out silk screen sintering by using the furnace. The technical scheme is as follows: the silk screen sintering furnace comprises a furnace body formed by a furnace wall and a furnace cavity, 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 the position, which corresponds to the first through hole, above the sintering cavity; a hydraulic ejection rod of the hydraulic mechanism passes through the first through hole and the second through hole; and the hydraulic ejection rod comprises a heat-resisting ejection rod on the top and a metal supporting rod behind the heat-resisting ejection rod. In a process of sintering, pressure between net sheets in a sintering network is increased, so that the energy consumption of primary sintering and molding is reduced compared with the prior art which adopts sintering, cold rolling, re-sintering or many times of circulation, and the production cost is reduced; a separation layer is saved, a washing procedure is reduced and the working efficiency is improved; and the problem that a stainless steel material is damaged is reduced and the filtering precision of a sintering net is more uniform.

Description

[0001] The present invention is a divisional application, the filing date of the original application is: May 9, 2012; the application number of the original application is: 201210141260.1; the invention and creation name of the original application is: screen sintering furnace and screen sintering with this furnace Methods. technical field [0002] The invention belongs to the technical field of wire mesh sintering, in particular to a wire mesh sintering furnace and a method for using the furnace to carry out wire mesh sintering. Background technique [0003] Sintered mesh is a new type of filter material with high strength and overall rigidity, which is made of multi-layer wire woven mesh, pressed by special lamination, and sintered in a vacuum furnace. The hole is easily deformed and unstable. It is widely used in petroleum, chemical industry, energy, aviation, aerospace, safety, environmental protection, medicine, electric power and other fields. [0004] The main equi...

Claims

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Application Information

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Patent Type & Authority Applications(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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