CN102589282B - Device for sintering magnetic material - Google Patents
Device for sintering magnetic material Download PDFInfo
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- CN102589282B CN102589282B CN 201210054990 CN201210054990A CN102589282B CN 102589282 B CN102589282 B CN 102589282B CN 201210054990 CN201210054990 CN 201210054990 CN 201210054990 A CN201210054990 A CN 201210054990A CN 102589282 B CN102589282 B CN 102589282B
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Abstract
The invention relates to a device for sintering a magnetic material. The device is characterized in that the device comprises a sintering furnace body 1, a sintering furnace thermal-insulating layer 2, a sintering ferrite magnetic core blank placing platform 3, a lifting platform guide rail 4, a lifting platform 5, a rotatable furnace bottom 6, an air curtain temperature-insulating device and a multipurpose heat energy recycling system. In the device, high-heat air can be prevented from penetrating through a sealing structure by a small amount of the air so that damage caused by high heat to accessory equipment and workshop staff is prevented. With the adoption of the multipurpose heat energy recycling system, injected air can be preheated by the quantity of heat of the exhausted high-heat air so that the surface of a magnetic core can not be cooled too fast, the effect of saving energy is achieved, and the damage to the structure of a mixed gas chamber by the high-heat air can be reduced. 30 to 500 DEG C of heat air can be supplied by a heater to replace the heating action of silicon molybdenum rods in a furnace at different stages so that the service life of the silicon molybdenum rods is prolonged. Sintered magnetic core is driven by the adjustable rotation furnace bottom to rotate. The production efficiency and the product quality are improved, and resources and energy can be saved.
Description
Technical field
What the present invention relates to is a kind of sintering equipment of magnetic material, belongs to magnetic material sintering preparing technical field.
Background technology
Soft magnetic ferrite is widely used in directions such as communication, sensing, Switching Power Supply, EMI.Particularly along with the continuous progress of science and technology, soft magnetic ferrite also constantly is applied to new field as large-scale base station, radar, high-tech sectors such as chip manufacturing.This has all produced new requirement as the size of super large to soft magnetic ferrite, and the size of single product surpasses 800cm, perhaps the special product that can't one-shot forming needs machining of shape.Large-scale in the prior art magnetic ferrite magnetic core is often realized by less magnetic core being carried out bonding the acquisition, because be that technique for sticking need be used adhesive, this serviceability temperature to soft magnetic ferrite has bigger restriction, and big magnetic core should be the reason of thermal expansion can not rapid temperature rise and drop, cause adhesive drying time longly to influence the production cycle.And the difficult control of the thickness of adhesive, to the magnetic conductivity of soft magnetic ferrite, Q value, impedance influences are very big, but in the whole magnetic ferrite magnetic core sintering process owing to the caloric value difference of each heating module, the deformation that causes.Hardness is high and therefore crisp processing difficulties all carries out machining before sintering behind the sintering soft magnetic ferrite.Make magnetic core inside gather stress easily, stress is considerable when core volume is very big.So problems of crack appears in the magnetic ferrite magnetic core of above situation easily in sintering process, mainly be because following two kinds of situations mainly are the nature cooling at general kiln in the temperature descending section temperature, shortage is to the accurate control and the intervention means of cooling rate, make the soft magnetic ferrite crystal inside can not grow Wan but to produce defective and cause crackle, or owing to inject the cold air cooling, the transmission of large-scale magnetic core temperature is slow, the injection of air makes surface temperature descend rapidly, and the inconsistent stress release of speed that internal temperature decline is expanded with heat and contract with cold very slowly cracks.Because higher 1000 ~ 1450 ℃ of sintering soft magnetic ferrite temperature generally uses Si-Mo rod as heating component.But the Si-Mo rod resistance is very low when low temperature, produces same heat and will make the lost of life of Si-Mo rod by powerful electric current.Because furnace bottom can't use or will frequently change in rotation and the very high general encapsulant of temperature, the safe in utilization and life-span that makes body of heater and fire door interface go out usually can give off near the healthy and safe and equipment of the operating personnel the temperatures involved near has also been wasted heat energy increase energy consumption.So, how to provide the kiln of a kind of sintering super-large diameter or the special soft magnetic ferrite of bulky shape, to avoid above-described various shortcoming.Become the present problem demanding prompt solution of association area dealer.
Summary of the invention
What the present invention proposed is a kind of sintering equipment of magnetic material, purpose is, overcome the problem that super-large diameter or the special soft magnetic ferrite of bulky shape are reduced by fritter splicing performance, overcome cracking appears in super-large diameter or the special soft magnetic ferrite of bulky shape easily in sintering process phenomenon, super-large diameter or the special soft magnetic ferrite of bulky shape have been overcome because the inconsistent problem of each several part crystal development that non-uniform temperature causes, reach and enhance productivity, improve product percent of pass, reached and economize on resources when meeting the need of market and the energy, the purpose that minimizing pollutes environment.
Technical solution of the present invention: the thermal insulation layer, ferrite sintered body magnetic core blank placement platform, hoistable platform guide rail, hoistable platform, the rotatable furnace bottom that it is characterized in that comprising sintering kiln body of heater, sintering kiln; Wherein the hoistable platform guide rail fixes on the ground, rotatable furnace bottom is installed on the hoistable platform, the sintering kiln body of heater is fixed on the top of hoistable platform guide rail, and the last thermal insulation layer of sintering kiln is in the sintering kiln body of heater, and ferrite sintered body magnetic core blank placement platform is in rotatable furnace bottom; Rotatable furnace bottom and variable-frequency motor join, first of sintering kiln body of heater exports the Jiao Kou that runs in, second outlet of sintering kiln body of heater connects first inlet of mixed gas chamber, second inlet of mixed gas chamber connects first compressed air inlet, the 3rd inlet of mixed gas chamber connects second compressed air inlet, first outlet of mixed gas chamber connects the residual gas floss hole, and second outlet of mixed gas chamber inserts in the sintering kiln body of heater by air pump, heater; The closed air curtain Heat-insulation device that forms of sintering kiln body of heater and rotatable furnace bottom.
Usefulness of the present invention is: the equidistant valve of installing in the groove of the first and the 3rd sealed insulation layer, this valve can form air curtain, makes air pressure in hermetically-sealed construction than the high 0.1 ~ 1Kpa of the gas pressure in the body of heater.A spot of air just can stop high hot-air by hermetically-sealed construction, prevents the infringement that high heat is brought auxiliary device and plant personnel.When the sintering manganese-zinc ferrite, feed nitrogen, not only can stop high hot-air, can also stop extraneous air to enter body of heater, cause the oxidation of product by hermetically-sealed construction.2. the multipurpose thermal energy cyclic utilization system is by being made up of gas heat-exchanger, pipeline, compressed air inlet, residual gas floss hole, mixing chamber, controller, heater.The air that this design can utilize the heat preheating of the hot gas of discharge to inject, it is too fast that the magnetic core surface can not lowered the temperature, and plays the effect of energy savings, can also reduce the infringement of high hot-air to the mixing chamber structure; Heater can provide the heat effect of hot-air Si-Mo rod in different phase substitutes kiln of 30 ~ 500 ℃ to prolong the service life of Si-Mo rod; Can discharge the gas of mixed lower temperature by the residual gas floss hole, play and regulate body of heater pressure and can reduce the harm that the high-temperature gas discharging brings.3. the furnace bottom that can regulate rotation drives the rotation of the magnetic core that is sintered.Thereby reach large-scale magnetic core thermally equivalent, draining, binder removal, prevent hidden danger such as product cracking, the disturbance that can also drive furnace air helps distribution more even of temperature.Effectively raise the efficient and the product quality of production, and can economize on resources and the energy, promptly effectively overcome various shortcoming of the prior art.
Description of drawings
Accompanying drawing 1 is the sintering equipment structural representation of magnetic material.
Accompanying drawing 2 is structural representations of air curtain Heat-insulation device.
Among the figure 1 is sintering kiln body of heater, the 2nd, the thermal insulation layer of sintering kiln, the 3rd, and ferrite sintered body magnetic core blank placement platform, the 4th, hoistable platform guide rail, the 5th, hoistable platform, the 6th, rotatable furnace bottom, 7 are first thermal insulation layers, the 8th, and gas curtain air nozzle, the 9th, heat-resistant rubber seal ring, 10 are the 3rd thermal insulation layers, the 11st, and outer jointing jacket, 12 is second thermal insulation layers, the 13rd, the FERRITE CORE blank that is sintered, 14 furnace bottom thermal insulation layers.
The specific embodiment
Contrast accompanying drawing 1, its structure comprises thermal insulation layer 2, ferrite sintered body magnetic core blank placement platform 3, hoistable platform guide rail 4, hoistable platform 5, the rotatable furnace bottom 6 of sintering kiln body of heater 1, sintering kiln; Wherein hoistable platform guide rail 4 fixes on the ground, rotatable furnace bottom 6 is installed on the hoistable platform 5, sintering kiln body of heater 1 is fixed on the top of hoistable platform guide rail 4, and the last thermal insulation layer 2 of sintering kiln is in sintering kiln body of heater 1, and ferrite sintered body magnetic core blank placement platform 3 is in rotatable furnace bottom 6; Rotatable furnace bottom 6 joins with variable-frequency motor, first of sintering kiln body of heater 1 exports the Jiao Kou that runs in, second outlet of sintering kiln body of heater 1 connects first inlet of mixed gas chamber, second inlet of mixed gas chamber connects first compressed air inlet, the 3rd inlet of mixed gas chamber connects second compressed air inlet, first outlet of mixed gas chamber connects the residual gas floss hole, and second outlet of mixed gas chamber inserts in the sintering kiln body of heater 1 by air pump, heater;
Described sintering kiln body of heater 1 comprises the thermal insulation layer 2 of body of heater shell and sintering kiln, and this shell is made up of steel construction, can bear the pressure of 8Kpa, is used to install refractory material and attached breather pipe and uses; The thermal insulation layer 2 of sintering kiln is made up of refractory brick and high-temperature fibre.Be used to stop the transmission of heat to sintering kiln body of heater shell.
Ferrite sintered body magnetic core blank placement platform 3 adopts the corundum structure, Heat stability is good, and heat distortion amount is little,
Be used to place the blank of magnetic material that will sintering, this blank can be super-large diameter or the special soft magnetic ferrite of bulky shape.
Hoistable platform guide rail 4, the guiding of control hoistable platform is convenient to the driving fit of furnace bottom and body of heater.
Hoistable platform 5 carries rotatable furnace bottom 6 and variable-frequency motor on hoistable platform guide rail 4, does moving up and down.
Rotatable furnace bottom 6 is made up of furnace bottom shell, furnace bottom thermal insulation layer 14.
Contrast accompanying drawing 2, its structure comprise first thermal insulation layer 7, gas curtain air nozzle 8, heat-resistant rubber seal ring 9, the 3rd thermal insulation layer 10, outer jointing jacket 11, second thermal insulation layer 12, the FERRITE CORE blank 13 that is sintered; Wherein first thermal insulation layer 7 is installed in the most inboard of body of heater, and gas curtain air nozzle 8 is installed in the groove between first thermal insulation layer 7 and the 3rd thermal insulation layer 10; Compressed air 3 provides compressed air to gas curtain air nozzle 8; Heat-resistant rubber seal ring 9 is located at 11 of the 3rd thermal insulation layer 10 and outer jointing jackets; The 3rd thermal insulation layer 10 is installed in the outermost of body of heater, and second thermal insulation layer 12 is installed on the rotatable furnace bottom 6, and the FERRITE CORE blank 13 that is sintered is contained on the ferrite sintered body magnetic core blank placement platform 3.
Sintering kiln body of heater 1 forms the air curtain Heat-insulation device with the rotatable furnace bottom of carrying 6 closed backs.
Example 1: contrast Fig. 1
During sintering, correct ferrite sintered body magnetic core blank placement platform 3 with horizon rule earlier, determine that tolerance is in the scope that technology allows.The soft magnetic ferrite that the bulky, the shape that need sintering is special is placed on the ferrite sintered body magnetic core blank placement platform 3 stably; Promote hoistable platform 5 then, make sintering kiln body of heater 1 and rotatable furnace bottom 6 closures form the air curtain Heat-insulation devices; Restart variable-frequency motor and regulate the rotating speed of variable-frequency motor, make furnace bottom begin speed rotation by technological requirement.Open the air curtain Heat-insulation device, utilize air pressure to form air curtain, stop high hot-air by heat-resistant rubber seal ring 9, thereby prevent the high hot infringement that auxiliary device and plant personnel are brought with a spot of air than sintering kiln body of heater 1 high 0.1 ~ 1Kpa.
Enable the multipurpose thermal energy cyclic utilization system, this system is made up of heat exchanger, air pump, wet chamber, first compressed air, second compressed air, heater, residual gas floss hole.
Air enters mixing chamber from second compressed air and enters sintering kiln body of heater 1 by air pump by the heater heating, substituted for silicon molybdenum bar work when heater uses in low-temperature zone.Provide 30 ~ 90 ℃ hot-air in the preparatory stage, provide 90 to 500 ℃ hot-air in the binder removal stage by heater, make ferrite blank progressively to discharge moisture and adhesive slowly, moisture that is discharged and adhesive are discharged by the binder removal mouth.Use the pattern of Si-Mo rod heating more than 500 ℃, close heater and binder removal mouth this moment, but the circulatory system is opened the air that makes in the sintering kiln body of heater 1 always and can be flowed and make the temperature in the sintering kiln body of heater 1 more even, is heated to ferrite sintered temperature required 1200-1350 ℃ and enter temperature retention time 2-8 hour always.Temperature retention time enters temperature-fall period after finishing, the multipurpose thermal energy cyclic utilization system begins to mix and refill sintering kiln body of heater 1 by extracting high-temperature hot air and compressed air hot-air and the cold air by the heat exchanger generation in the sintering kiln body of heater 1 out, this heat exchanger can also reduce pipe temperature and play effect to pipe protection,, promptly stop injecting compressed air and cooperate heater to reach the purpose of entirely accurate control cooling rate by regulating cold and hot and high hot-air ratio by controller control when cooling rate is too fast; Reduce the large product cracking phenomena.Make that large product can be integral sintered, improve performance, production efficiency and the quality of product.
The air curtain Heat-insulation device is made up of gas curtain air, nozzle and three layers of thermal insulation layer.Heater is a resistance heater.
Claims (1)
1. the sintering equipment of magnetic material
,It is characterized in that comprising thermal insulation layer, ferrite sintered body magnetic core blank placement platform, hoistable platform guide rail, hoistable platform, the rotatable furnace bottom of sintering kiln body of heater, sintering kiln; Wherein the hoistable platform guide rail fixes on the ground, rotatable furnace bottom is installed on the hoistable platform, the sintering kiln body of heater is fixed on the top of hoistable platform guide rail, and the thermal insulation layer of sintering kiln is in the sintering kiln body of heater, and ferrite sintered body magnetic core blank placement platform is in rotatable furnace bottom; Rotatable furnace bottom and variable-frequency motor join, first of sintering kiln body of heater exports the Jiao Kou that runs in, second outlet of sintering kiln body of heater connects first inlet of mixed gas chamber, second inlet of mixed gas chamber connects first compressed air inlet, the 3rd inlet of mixed gas chamber connects second compressed air inlet, first outlet of mixed gas chamber connects the residual gas floss hole, and second outlet of mixed gas chamber inserts in the sintering kiln body of heater by air pump, heater; The closed air curtain Heat-insulation device that forms of sintering kiln body of heater and rotatable furnace bottom;
DescribedThe air curtain Heat-insulation device comprises first thermal insulation layer, gas curtain air nozzle, heat-resistant rubber seal ring, the 3rd thermal insulation layer, outer jointing jacket, second thermal insulation layer, the FERRITE CORE blank that is sintered; Wherein first thermal insulation layer is installed in the most inboard of body of heater, and the gas curtain air nozzle is installed in the groove between first thermal insulation layer and the 3rd thermal insulation layer; Heat-resistant rubber seal ring is located between the 3rd thermal insulation layer and outer jointing jacket; The 3rd thermal insulation layer is installed in the outermost of body of heater, and second thermal insulation layer is installed on the rotatable furnace bottom, and the FERRITE CORE blank that is sintered is contained on the ferrite sintered body magnetic core blank placement platform; Form groove at first thermal insulation layer and the 3rd thermal insulation layer, the equidistant gas curtain air nozzle of installing in this groove, this gas curtain air nozzle can form air curtain; Described rotatable furnace bottom drives the magnetic material rotation that is sintered.
2.The sintering equipment of magnetic material according to claim 1, it is characterized in that, also comprise the multipurpose thermal energy cyclic utilization system of forming by gas heat-exchanger, pipeline, compressed air inlet, residual gas floss hole, mixed gas chamber, controller, heater.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210054990 CN102589282B (en) | 2012-03-05 | 2012-03-05 | Device for sintering magnetic material |
| CN 201220078298 CN202470734U (en) | 2012-03-05 | 2012-03-05 | Device for sintering magnetic material |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210054990 CN102589282B (en) | 2012-03-05 | 2012-03-05 | Device for sintering magnetic material |
| CN 201220078298 CN202470734U (en) | 2012-03-05 | 2012-03-05 | Device for sintering magnetic material |
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| Publication Number | Publication Date |
|---|---|
| CN102589282A CN102589282A (en) | 2012-07-18 |
| CN102589282B true CN102589282B (en) | 2013-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210054990 Active CN102589282B (en) | 2012-03-05 | 2012-03-05 | Device for sintering magnetic material |
| CN 201220078298 Expired - Fee Related CN202470734U (en) | 2012-03-05 | 2012-03-05 | Device for sintering magnetic material |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220078298 Expired - Fee Related CN202470734U (en) | 2012-03-05 | 2012-03-05 | Device for sintering magnetic material |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589282B (en) * | 2012-03-05 | 2013-07-31 | 南京深宁磁电有限公司 | Device for sintering magnetic material |
| CN103884180A (en) * | 2014-03-03 | 2014-06-25 | 山东嘉诺电子有限公司 | Heat cycle negative-pressure bell kiln for sintering soft magnetic ferrite cores |
| CN103913059B (en) * | 2014-04-02 | 2015-09-16 | 湖州科富电子科技有限公司 | A kind of vertically sintering furnace |
| CN108405855B (en) * | 2018-06-07 | 2024-03-15 | 宁波恒普技术股份有限公司 | Degreasing sintering furnace for metal powder injection molding |
| CN109848411A (en) * | 2019-01-21 | 2019-06-07 | 安徽精磁电子有限公司 | It is a kind of essence magnetic material processing use agglomerating plant |
| CN111649581B (en) * | 2020-06-24 | 2021-12-03 | 河南科技大学 | Calcination binder removal system that alloy powder extruded part used |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201327292Y (en) * | 2008-09-12 | 2009-10-14 | 秦文隆 | Continuous-type vacuum-atmosphere sintering furnace |
| CN201463510U (en) * | 2009-07-02 | 2010-05-12 | 马武明 | Sintering system of magnetic material |
| CN201476537U (en) * | 2009-06-17 | 2010-05-19 | 长沙矿冶研究院 | Artificial intelligent controllable atmosphere bell-type resistance furnace for sintering soft magnetic ferrite |
| CN201653141U (en) * | 2010-02-05 | 2010-11-24 | 天津天和磁材技术有限公司 | Rotatable vertical fritting furnace |
| CN202470734U (en) * | 2012-03-05 | 2012-10-03 | 南京深宁磁电有限公司 | Device for sintering magnetic material |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2658489C2 (en) * | 1976-12-23 | 1983-12-22 | Ludwig Riedhammer GmbH & Co KG, 8500 Nürnberg | Furnace for sintering magnetic ceramic materials |
-
2012
- 2012-03-05 CN CN 201210054990 patent/CN102589282B/en active Active
- 2012-03-05 CN CN 201220078298 patent/CN202470734U/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201327292Y (en) * | 2008-09-12 | 2009-10-14 | 秦文隆 | Continuous-type vacuum-atmosphere sintering furnace |
| CN201476537U (en) * | 2009-06-17 | 2010-05-19 | 长沙矿冶研究院 | Artificial intelligent controllable atmosphere bell-type resistance furnace for sintering soft magnetic ferrite |
| CN201463510U (en) * | 2009-07-02 | 2010-05-12 | 马武明 | Sintering system of magnetic material |
| CN201653141U (en) * | 2010-02-05 | 2010-11-24 | 天津天和磁材技术有限公司 | Rotatable vertical fritting furnace |
| CN202470734U (en) * | 2012-03-05 | 2012-10-03 | 南京深宁磁电有限公司 | Device for sintering magnetic material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN202470734U (en) | 2012-10-03 |
| CN102589282A (en) | 2012-07-18 |
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