CN103286847A - One-time forming method and special mold for graphite insulation barrel - Google Patents
One-time forming method and special mold for graphite insulation barrel Download PDFInfo
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- CN103286847A CN103286847A CN2012103604729A CN201210360472A CN103286847A CN 103286847 A CN103286847 A CN 103286847A CN 2012103604729 A CN2012103604729 A CN 2012103604729A CN 201210360472 A CN201210360472 A CN 201210360472A CN 103286847 A CN103286847 A CN 103286847A
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- preserving container
- graphite heat
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- graphite
- core rod
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Abstract
The invention discloses a one-time forming method and special mold for a graphite insulation barrel. The special mold includes a female mold and a mold core, wherein the mold core is concentrically arranged in the female mold; and the bottom of the axial section view projection of the mold core is right-angled. The one-time forming method comprises the steps as follows: adding a powdery material into a special mold, then placing the special mold into an isostatic pressing forming machine for forming, then placing an obtained product into a roasting furnace for roasting, and finally loading the obtained product into a graphitization furnace for graphitization treatment. According to the invention, not only is the blank waste caused by secondary machining of the cylindrical graphite blank avoided, but also the production period is greatly shortened; the energy is saved; and moreover, the graphite insulation barrel is uniform in wall thickness and consistent in quality, so that the service life of the graphite insulation barrel is prolonged.
Description
Technical field
The invention belongs to the field shaping technique of graphite heat-preserving container, relate in particular to a kind of one-step moulding method and particular manufacturing craft thereof of graphite heat-preserving container.
Background technology
Production fusion monocrystalline and metal are to realize with the method for cylindrical graphite blank by machining with the graphite heat-preserving container at present, that is: when making graphite heat-preserving container finished product, hollow circle tube need be drawn in the middle part of cylindrical graphite blank, this just makes that the waste of material when the graphite heat-preserving container is produced is big, production cycle is long, simultaneously, because the inside and outside quality of cylinder blank there are differences, the graphite heat-preserving container product quality that processes is inhomogeneous, very easily influences result of use and the life-span thereof of graphite heat-preserving container.In order to guarantee that the graphite heat-preserving container reaches instructions for use, prolongs graphite heat-preserving container service life, in cylindrical graphite blank production process, must carry out three roastings two at least and procedure of processing (as shown in Figure 1) such as soak, from as shown in Figure 1 as can be known, each roasting needs 30～40 day time, and then the pitch of putting into high-pressure bottle flooded 8～12 hours, and so forth, the roasting product graphite heat-preserving container that last roasting is obtained just obtains the graphite heat-preserving container of customer requirements again after graphitization processing, Surface Machining processing and machinery are emptied.Therefore, graphite heat-preserving container production cycle length in the prior art, the energy consumption height of unit product, production cost height are self-evident.In the last few years, graphite heat-preserving container manufacturer all be devoted to research can one-time formed graphite heat-preserving container production method.
Summary of the invention
The present invention is directed to the defective that prior art exists, a kind of graphite heat-preserving container one-step moulding method and particular manufacturing craft thereof are provided, can shorten the graphite heat-preserving container production cycle, reduce the waste of graphite heat-preserving container blank, also can improve graphite heat-preserving container quality, prolong the service life of graphite heat-preserving container.
The present invention is achieved through the following technical solutions:
Graphite heat-preserving container particular manufacturing craft comprises former and core rod, and described core rod concentric is located in the 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, and core rod is axially analysed and observe the projection bottom at right angles.
The further improvement project of the present invention is the folder chamber between former and the core rod and graphite heat-preserving container size coupling.
The present invention further improvement project is that the edge portion of described bending edges is provided with the spacing breach of a circle, is positioned at spacing breach on the former.
The present invention further improvement project is that described bending edges and core rod axis are 90 ° of settings.
A kind of one-step moulding method of graphite heat-preserving container 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 proportioning by the mass ratio of 30～40:60～70;
3). mix and to pinch: will wear into pitch coke behind the powder and petroleum coke powder and add to mix to pinch in the pot and stir, kneading temperature is 150～200 ℃, pinches the pitch that adds in the pot after the fusing to mixing again, continues to stir to soak into the powder particle fully to pitch behind 2.5～3.5h and become thickener;
4). roll sheet: thickener is added roll into tablet in the flaking machine;
5). abrasive dust: tablet is worn into powder;
6). isostatic compaction: the granular material that step 5) is obtained adds in the particular manufacturing craft, and particular manufacturing craft is made encapsulation process, puts it into then in the isostatic compaction machine, and pressure is 150～200MP
aDown, isostatic compaction 30～90min, compact density are 1.65～1.75g/cm
3
7). roasting: the heat-preserving container blank that step 6) is obtained is put into roaster and is carried out 750～1000 ℃ of roastings, gets the roasting product heat-preserving container;
8). graphitization: the graphitization processing with the roasting product heat-preserving container is packed into and carried out 2500～3000 ℃ in the graphitizing furnace gets the graphite heat-preserving container.
The further improvement of the present invention scheme is: the abrasive dust described in the step 1) is the powder of pitch coke and petroleum coke being worn into 15～25 μ m.
The further improvement of the present invention scheme is: the sheet that rolls described in the step 4) is that thickener is rolled into the thick tablet of 1～2mm.
The further improvement of the present invention scheme is: the abrasive dust described in the step 5) is that tablet is worn into powder below the 75 μ m.
Compared with prior art, the present invention has following advantage:
One, the present invention directly adds isostatic compaction in the mould with the powder in the graphite blank production process, because the graphite blank behind the isostatic compaction is hollow structure, its quality is more much smaller than solid cylinder blank, therefore need only can obtain graphite heat-preserving container 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 shortened the production cycle greatly, saved the energy, what is more important, owing to adopt the particular manufacturing craft isostatic compaction, the graphite heat-preserving container wall thickness of moulding is even, uniform quality, the service life of having improved the graphite heat-preserving container.
Two, because the present invention directly adds isostatic compaction in the mould with powder in graphite blank production process, therefore, be not prone to waste product in the production process, the yield rate height.
To sum up, adopt graphite heat-preserving container one-step moulding method provided by the invention to shorten the production cycle greatly, effectively save production cost, reduce the energy consumption of unit product.
Description of drawings
Fig. 1 is the prior art processes flow chart;
Fig. 2 is process chart of the present invention;
Fig. 3 is the axial cross-sectional schematic of particular manufacturing craft of the present invention.
Fig. 4 is Fig. 3 A-A cross-sectional schematic.
The specific embodiment
The invention will be further described below in conjunction with embodiment and accompanying drawing, and this embodiment only is used for explaining the present invention, does not constitute the restriction to protection domain of the present invention.
Fig. 3 and shown in Figure 4 be the embodiment of graphite heat-preserving container particular manufacturing craft, graphite heat-preserving container particular manufacturing craft comprises former 1 and core rod 2, described core rod 2 concentrics are located in the 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 the projection bottom at right angles, the folder chamber between former 1 and the core rod 2 and graphite heat-preserving container size coupling.
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 present embodiment is made the graphite heat-preserving container are:
1). abrasive dust: pitch coke and petroleum coke are worn into powder below the 20 μ m;
2). batching: pitch coke and petroleum coke are carried out proportioning by the mass ratio of 35:65;
3). mix and to pinch: will wear into pitch coke behind the powder and petroleum coke powder and add to mix to pinch in the pot and stir, kneading temperature is 180 ℃, pinches the pitch that adds in the pot after the fusing to mixing again, continues to stir to soak into the powder particle fully to pitch behind the 3h and become thickener;
4). roll sheet: thickener is added roll into the thick tablet of 1.5mm in the flaking machine;
5). abrasive dust: tablet is worn into powder below the 75 μ m;
6). isostatic compaction: the granular material that step 5) is obtained adds in the particular manufacturing craft, and particular manufacturing craft is carried out encapsulation process (after coating entire die with plastic sheeting it is evacuated, make plastic sheeting sealing particular manufacturing craft), put it into then in the isostatic compaction machine, pressure is 180MP
a, isostatic compaction 50 minutes, compact density are 1.7g/cm
3
7). roasting: the heat-preserving container blank that step 6) is obtained is put into roaster and is carried out 850 ℃ of roastings, gets the roasting product heat-preserving container;
8). graphitization: the graphitization processing with the roasting product heat-preserving container is packed into and carried out 2650 ℃ in the graphitizing furnace gets the graphite heat-preserving container.
After the graphite heat-preserving container that step 8) is obtained carries out surperficial precision processing (for example polishing etc.) get final product the finished product graphite heat-preserving container of customer requirements.
Claims (8)
1. graphite heat-preserving container particular manufacturing craft, it is characterized in that: comprise former (1) and core rod (2), described core rod (2) concentric is located in the 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), and core rod (2) is axially analysed and observe the projection bottom at right angles.
2. a kind of graphite heat-preserving container particular manufacturing craft as claimed in claim 1 is characterized in that: the folder chamber between former (1) and the core rod (2) and graphite heat-preserving container size coupling.
3. a kind of graphite heat-preserving container particular manufacturing craft as claimed in claim 1 is characterized in that: the edge portion of described bending edges (21) is provided with a circle spacing breach (22), and former (1) upper end is positioned at spacing breach (22).
4. a kind of graphite heat-preserving container particular manufacturing craft as claimed in claim 1 or 2 is characterized in that: described bending edges (21) is 90 ° of settings with core rod (2) axis.
5. the one-step moulding method of a graphite heat-preserving container 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 proportioning by the mass ratio of 30～40:60～70;
3). mix and to pinch: will wear into pitch coke behind the powder and petroleum coke powder and add to mix to pinch in the pot and stir, kneading temperature is 150 ℃～200 ℃, pinches the pitch that adds in the pot after the fusing to mixing again, continues to stir to soak into the powder particle fully to pitch behind 2.5～3.5h and become thickener;
4). roll sheet: thickener is added roll into tablet in the flaking machine;
5). abrasive dust: tablet is worn into powder;
6). isostatic compaction: the granular material that step 5) is obtained adds in the particular manufacturing craft, and particular manufacturing craft is made encapsulation process, puts it into then in the isostatic compaction machine, and pressure is 150～200MP
aDown, isostatic compaction 30～90 minutes, compact density are 1.65～1.75g/cm
3
7). roasting: the heat-preserving container blank that step 6) is obtained is put into roaster and is carried out 750 ℃～1000 ℃ roastings, gets the roasting product heat-preserving container;
8). graphitization: the graphitization processing with the roasting product heat-preserving container is packed into and carried out 2500 ℃～3000 ℃ in the graphitizing furnace gets the graphite heat-preserving container.
6. the one-step moulding method of a kind of graphite heat-preserving container as claimed in claim 5: it is characterized in that: the abrasive dust described in the step 1) is the powder of pitch coke and petroleum coke being worn into 15～25 μ m.
7. the one-step moulding method of a kind of graphite heat-preserving container as claimed in claim 5, it is characterized in that: the sheet that rolls described in the step 4) is that thickener is rolled into the thick tablet of 1～2mm.
8. the one-step moulding method of a kind of graphite heat-preserving container as claimed in claim 5: it is characterized in that: the abrasive dust described in the step 5) is that tablet is worn into powder below the 75 μ m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210360472.9A CN103286847B (en) | 2012-09-25 | 2012-09-25 | One-time forming method and special mold for graphite insulation barrel |
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| CN201210360472.9A CN103286847B (en) | 2012-09-25 | 2012-09-25 | One-time forming method and special mold for graphite insulation barrel |
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| CN103286847A true CN103286847A (en) | 2013-09-11 |
| CN103286847B CN103286847B (en) | 2014-03-12 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103302730A (en) * | 2012-09-25 | 2013-09-18 | 江苏宏基炭素科技有限公司 | Once shaping method for graphite heating element and special mold thereof |
| 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 |
| CN109293361A (en) * | 2018-12-03 | 2019-02-01 | 大同新成新材料股份有限公司 | A kind of graphite insulation barrel one-time-shaped mould and its forming method |
| 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 |
| CN111483171A (en) * | 2020-04-22 | 2020-08-04 | 四川士达特种炭材有限公司 | Isostatic pressing graphite barrel material forming die and isostatic pressing cylindrical graphite processing method |
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| WO1987005076A1 (en) * | 1986-02-25 | 1987-08-27 | Peter Greiner | Piston engine |
| US5525276A (en) * | 1993-10-22 | 1996-06-11 | Tokai Carbon Company Ltd. | Method for manufacturing high strength isotropic graphite piston components |
| CN101823707A (en) * | 2010-04-28 | 2010-09-08 | 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 |
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2012
- 2012-09-25 CN CN201210360472.9A patent/CN103286847B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO1987005076A1 (en) * | 1986-02-25 | 1987-08-27 | Peter Greiner | Piston engine |
| US5525276A (en) * | 1993-10-22 | 1996-06-11 | Tokai Carbon Company Ltd. | Method for manufacturing high strength isotropic graphite piston components |
| CN101823707A (en) * | 2010-04-28 | 2010-09-08 | 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 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103302730A (en) * | 2012-09-25 | 2013-09-18 | 江苏宏基炭素科技有限公司 | Once shaping method for graphite heating element and special mold thereof |
| 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 |
| CN109293361A (en) * | 2018-12-03 | 2019-02-01 | 大同新成新材料股份有限公司 | A kind of graphite insulation barrel one-time-shaped mould and its forming method |
| 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 |
| CN111483171A (en) * | 2020-04-22 | 2020-08-04 | 四川士达特种炭材有限公司 | Isostatic pressing graphite barrel material forming die and isostatic pressing cylindrical graphite processing method |
| CN111483171B (en) * | 2020-04-22 | 2021-04-23 | 四川士达特种炭材有限公司 | Processing method for producing isostatic pressing cylindrical graphite by using isostatic pressing graphite barrel material forming die |
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| CN103286847B (en) | 2014-03-12 |
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Address after: 223700 south of Zhejiang Road and 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, economic development zone, Siyang County, Suqian City, Jiangsu Province Patentee before: HOKEN CARBON TECHNIQUES Co.,Ltd. |
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