CN103302730B - Once shaping method for graphite heating element and special mold thereof - Google Patents
Once shaping method for graphite heating element and special mold thereof Download PDFInfo
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- CN103302730B CN103302730B CN201210360467.8A CN201210360467A CN103302730B CN 103302730 B CN103302730 B CN 103302730B CN 201210360467 A CN201210360467 A CN 201210360467A CN 103302730 B CN103302730 B CN 103302730B
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Abstract
The invention discloses a once shaping method for a graphite heating element and a mold thereof. The mold comprises a female die and a mold core, wherein the mold core is arranged in the female die concentrically, and an axial section view projection bottom of the mold core is of a right angle. The once shaping method comprises the following steps of adding powder materials into the mold, placing the powder materials into an isostatic shaping machine for shaping, roasting the powder materials in a roasting furnace, and carrying out the graphitization treatment in a graphitization furnace. According to the once shaping method and the mold, the waste of blank materials caused by secondary processing of cylindrical graphite blank materials is avoided, a production period is greatly shortened, the energy is saved, more importantly, the wall thickness of the graphite heating element is uniform, the quality is uniform, and the service life of the graphite heating element is prolonged.
Description
Technical field
The invention belongs to the field shaping technique of graphite heating component, relate in particular to a kind of one-step moulding method and mould thereof of graphite heating component.
Background technology
Production melting monocrystalline and metal graphite heating component are that the method by machining realizes with cylindrical graphite blank at present, that is: when making graphite heating component finished product, hollow circle tube need to be drawn into in the middle part of cylindrical graphite blank, waste of material when this just makes graphite heating component produce is large, production cycle is long, simultaneously, because the inside and outside quality of cylinder blank there are differences, the graphite heating component product quality processing is inhomogeneous, very easily affects result of use and the life-span thereof of graphite heating component.In order to guarantee that graphite heating component reaches instructions for use, extends graphite heating component service life, in cylindrical graphite blank production process, the procedure of processing (as shown in Figure 1) such as must at least carry out that three roastings two are soaked, from as shown in Figure 1, each roasting needs 30～40 day time, and then the pitch of putting into high-pressure bottle floods 8～12 hours, and so forth, the roasting product graphite heating component last roasting being obtained just obtains the graphite heating component of customer requirements again after graphitization processing, Surface Machining processing and machinery are emptied.Therefore, in prior art, graphite heating component production cycle energy consumption long, unit product is high, production cost is high self-evident.In the last few years, graphite heating component manufacturer be all devoted to research can one-time formed graphite heating component production method.
Summary of the invention
The present invention is directed to the defect that prior art exists, a kind of graphite heating component one-step moulding method and mould thereof are provided, can shorten the graphite heating component production cycle, reduce the waste of graphite heating component blank, also can improve graphite heating component quality, extend the service life of graphite heating component.
The present invention is achieved through the following technical solutions:
A graphite heating component one-step moulding method, comprises the steps:
1). abrasive dust: pitch coke and petroleum coke are worn into powder;
2). batching: pitch coke and petroleum coke are carried out to proportioning by the mass ratio of 30～40:60～70;
3). kneading: the pitch coke after batching and petroleum coke powder are added in kneading pot and stirred, and kneading temperature is 150 ℃～200 ℃, then adds the pitch after fusing in kneading pot, continues to stir after 2.5～3.5h to pitch complete wetting powder particle and becomes thickener;
4). roll sheet: thickener is added and in flaking machine, rolls into tablet;
5). abrasive dust: tablet is worn into powder;
6). isostatic compaction: by step 5) powder that obtains adds in mould, and mould is made to encapsulation process, that is: with being evacuated after the coated whole mould of plastic sheeting, then putting it in iso-static pressure shaping machine, pressure is 150～200MP
aunder, isostatic compaction 30～90 minutes, compact density is 1.65～1.75g/cm
3;
7). by step 6) the heating element heater blank that obtains puts into roaster and carries out 750 ℃～1000 ℃ roastings, obtains roasting product heating element heater;
8). roasting product heating element heater is packed in graphitizing furnace and carries out the graphitization processing of 2650 ℃, obtain graphite heating component;
Described mould comprises former and core rod, and described core rod concentric is located in described former; The top of core rod is provided with bending edges, and described bending edges is covered in the upper end of described former, the pipe of described core rod for connecting, and the lower end of core rod is sitting in former basal surface; Mate with graphite heating component size in folder chamber between former and core rod.
The further improvement project of the present invention is, the abrasive dust described in step 1) is pitch coke and petroleum coke to be worn into the powder of 15～25 μ m.
The present invention further improvement project is that the sheet that rolls described in step 4) is that thickener is rolled into the tablet that 1～2mm is thick.
The present invention further improvement project is that the abrasive dust described in step 5) is that tablet is worn into the powder below 75 μ m.
The present invention further improvement project is, the edge portion of described bending edges is provided with the spacing breach of a circle, and former upper end is positioned at spacing breach.
The present invention further improvement project is that described bending edges and core rod axis are 90 ° of settings.
Compared with prior art, tool of the present invention has the following advantages:
One, the present invention directly adds isostatic compaction in mould by the powder in graphite blank production process, because the graphite blank after isostatic compaction is hollow structure, its quality is more much smaller than solid cylinder blank, therefore need only can obtain graphite heating component finished product through bakes to burn the article and graphitization, the blank waste that not only can avoid the secondary operations of cylindrical graphite blank to bring, and greatly shortened the production cycle, saved the energy, what is more important, owing to adopting mould isostatic compaction, the graphite heating component wall thickness of moulding is even, uniform quality, improved the service life of graphite heating component.
Two, due to the present invention be in graphite blank production process, powder is directly added to mould in isostatic compaction, therefore, in production process, be not prone to waste product, yield rate is high.
To sum up, adopt graphite heating component one-step moulding method provided by the invention greatly to shorten the production cycle, effectively save production cost, reduce the energy consumption of unit product.
Accompanying drawing explanation
Fig. 1 is prior art processes flow chart;
Fig. 2 is process chart of the present invention;
Fig. 3 is the axial cross-sectional schematic of mould of the present invention.
Fig. 4 is Fig. 3 A-A cross-sectional schematic.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing, the invention will be further described, and this embodiment only, for explaining the present invention, does not form limiting the scope of the present invention.
Shown in Fig. 3 and Fig. 4 is the embodiment of graphite heating component mould, and graphite heating component mould comprises former 1 and core rod 2, and described core rod 2 concentrics are located in described former 1; The top of core rod 2 is provided with bending edges 21, and described bending edges 21 is covered in the upper end of described former 1.
Described core rod 2 is axially analysed and observe projection bottom at right angles, and mate with graphite heating component size in the folder chamber between former 1 and core rod 2.
The edge portion of described bending edges 21 is provided with the spacing breach 23 of a circle, and former 1 upper end is positioned at spacing breach 23.Described bending edges 21 is 90 ° of settings with core rod 2 axis.
The concrete steps that the present embodiment is made graphite heating component are:
1). abrasive dust: pitch coke and petroleum coke are worn into the powder below 20 μ m;
2). batching: pitch coke and petroleum coke are carried out to proportioning by the mass ratio of 35:65;
3). kneading: the pitch coke after grinds and petroleum coke powder are added in kneading pot and stirred, and kneading temperature is 180 ℃, then adds the pitch after fusing in kneading pot, continues to stir after 3h to pitch complete wetting powder particle and becomes thickener;
4). roll sheet: thickener is added and in flaking machine, rolls into the tablet that 1.5mm is thick;
5). abrasive dust: tablet is worn into the powder below 75 μ m;
6). isostatic compaction: by step 5) granular material that obtains adds in mould, and mould is carried out to encapsulation process (with being evacuated after the coated whole mould of plastic sheeting, make plastic sheeting sealing moulding mould), then put it in iso-static pressure shaping machine, pressure is 180MP
a, isostatic compaction 50 minutes, compact density is 1.7g/cm
3;
7). by step 6) the heating element heater blank that obtains puts into roaster and carries out 850 ℃ of roastings, obtains roasting product heating element heater;
8). roasting product heating element heater is packed in graphitizing furnace and carries out the graphitization processing of 2650 ℃, obtain graphite heating component.
By step 8) graphite heating component that obtains carries out after surperficial precision processing (such as polishing etc.) and gets final product to obtain the finished product graphite heating component of customer requirements.
Claims (6)
1. a graphite heating component one-step moulding method, is characterized in that comprising the steps:
1). abrasive dust: pitch coke and petroleum coke are worn into powder;
2). batching: pitch coke and petroleum coke are carried out to proportioning by the mass ratio of 30～40:60～70;
3). kneading: the pitch coke after batching and petroleum coke powder are added in kneading pot and stirred, and kneading temperature is 150 ℃～200 ℃, then adds the pitch after fusing in kneading pot, continues to stir after 2.5～3.5h to pitch complete wetting powder particle and becomes thickener;
4). roll sheet: thickener is added and in flaking machine, rolls into tablet;
5). abrasive dust: tablet is worn into powder;
6). isostatic compaction: by step 5) powder that obtains adds in mould, and mould is made to encapsulation process, that is: with being evacuated after the coated whole mould of plastic sheeting, then putting it in iso-static pressure shaping machine, pressure is 150～200MP
aunder, isostatic compaction 30～90 minutes, compact density is 1.65～1.75g/cm
3;
7). by step 6) the heating element heater blank that obtains puts into roaster and carries out 750 ℃～1000 ℃ roastings, obtains roasting product heating element heater;
8). roasting product heating element heater is packed in graphitizing furnace and carries out the graphitization processing of 2650 ℃, obtain graphite heating component;
Described mould comprises former (1) and core rod (2), and described core rod (2) concentric is located in described former (1); The top of core rod (2) is provided with bending edges (21), and described bending edges (21) is covered in the upper end of described former (1), the pipe of described core rod (2) for connecting, and the lower end of core rod (2) is sitting in former (1) basal surface; Mate with graphite heating component size in folder chamber between former (1) and core rod (2).
2. a kind of graphite heating component one-step moulding method as claimed in claim 1, is characterized in that: the abrasive dust described in step 1) is pitch coke and petroleum coke to be worn into the powder of 15～25 μ m.
3. a kind of graphite heating component one-step moulding method as claimed in claim 1, is characterized in that: the sheet that rolls described in step 4) is that thickener is rolled into the tablet that 1～2mm is thick.
4. a kind of graphite heating component one-step moulding method as claimed in claim 1, is characterized in that: the abrasive dust described in step 5) is that tablet is worn into the powder below 75 μ m.
5. a kind of graphite heating component one-step moulding method as claimed in claim 1, is characterized in that: the edge portion of described bending edges (21) is provided with the spacing breach of a circle (22), and former (1) upper end is positioned at spacing breach (22).
6. a kind of graphite heating component one-step moulding method as claimed in claim 1, is characterized in that: described bending edges (21) is 90 ° of settings with core rod (2) axis.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210360467.8A CN103302730B (en) | 2012-09-25 | 2012-09-25 | Once shaping method for graphite heating element and special mold thereof |
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| CN201210360467.8A CN103302730B (en) | 2012-09-25 | 2012-09-25 | Once shaping method for graphite heating element and special mold thereof |
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| CN103302730B true CN103302730B (en) | 2014-02-26 |
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| CN107721425A (en) * | 2017-10-24 | 2018-02-23 | 大同新成新材料股份有限公司 | A kind of preparation method of negative material |
| CN108751182A (en) * | 2018-06-04 | 2018-11-06 | 中钢集团新型材料（浙江）有限公司 | One kind roasting roasting technique for isostatic pressing formed graphite one |
| CN109503169A (en) * | 2018-12-24 | 2019-03-22 | 成都阿泰克特种石墨有限公司 | A kind of special graphite and preparation method thereof |
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| JPH07118066A (en) * | 1993-10-22 | 1995-05-09 | Tokai Carbon Co Ltd | Production of high strength isotropic graphite material |
| CN101823707B (en) * | 2010-04-28 | 2011-12-14 | 四川广汉士达炭素股份有限公司 | Technical method for producing isostatic pressure graphite |
| CN201989217U (en) * | 2011-01-10 | 2011-09-28 | 宜昌浩诚工贸有限公司 | Clay graphite crucible moulding mould |
| CN103286847B (en) * | 2012-09-25 | 2014-03-12 | 江苏宏基炭素科技有限公司 | One-time forming method and special mold for graphite insulation barrel |
| CN103286850B (en) * | 2012-09-25 | 2014-04-09 | 江苏宏基炭素科技有限公司 | One-time forming method and special mold for graphite crucible |
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Address after: 223800 south of Zhejiang Road East of Taihu Road, Zhongxing Town, Siyang County, Suqian City, Jiangsu Province (Siyang Economic Development Zone) Patentee after: Jiangsu Hongji high tech Material Co.,Ltd. Address before: 223700 No. 269, Wencheng East Road, Siyang Development Zone, Suqian City, Jiangsu Province Patentee before: HOKEN CARBON TECHNIQUES Co.,Ltd. |