CN102285164B - Method for manufacturing composite flexible graphite sealing material and sealing gasket - Google Patents
Method for manufacturing composite flexible graphite sealing material and sealing gasket Download PDFInfo
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- CN102285164B CN102285164B CN201110193442.9A CN201110193442A CN102285164B CN 102285164 B CN102285164 B CN 102285164B CN 201110193442 A CN201110193442 A CN 201110193442A CN 102285164 B CN102285164 B CN 102285164B
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- flexible graphite
- sealing gasket
- wire netting
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- graphite
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Abstract
The invention relates to a method for manufacturing a composite flexible graphite sealing material and a sealing gasket. The sealing material is manufactured by superposing and combining a plurality of flexible graphite. The method is characterized in that a layer of a metal mesh, of which two faces are provided with barbs, is arranged between every two layers of the flexible graphite; the metal meshes are rapidly heated by using an electromagnetic heating manner; composite layers of the flexible graphite and the metal meshes are pressurized when the metal meshes are heated to 850-950 DEG C; the pressed pressure per unit of area can be selected between 200 kg/cm<2> and 500 kg/cm<2>, so that the barbs on the metal meshes can hook surface layers of the graphite layers which are close to the metal meshes to form a whole sealing material; and the whole sealing material is naturally cooled to normal temperature, i.e. the sealing material manufactured by superposing and combining a plurality of flexible graphite is made.
Description
Technical field
The present invention relates to a kind of preparation method and product of encapsulant, is a kind of modified graphite encapsulant and sealing gasket preparation method specifically, refers in particular to a kind of composite flexible graphite sealing material preparation method and product; Mainly be applicable to make packing ring, be directly pasted on metal and nonmetallic surface, effectively solve gas phase sealing.
Background technology
Encapsulant on market is a lot of now, applies also very extensive; Soft graphite is a kind of desirable encapsulant, is commonly called as " sealing king ", has good mechanical performance, physical property and chemical property.Soft graphite forms by after expanded graphite extrusion forming, and it had both retained the characteristic of graphite, had overcome again the shortcoming that native graphite is crisp and frangible, impact resistance is poor.Graphite after expanding loosens, porous and curling, similar caterpillar, claim worm, its surface area is large, and surface can be high, high adsorption capacity, without binding agent, only machining can make worm mutually adsorb, chimeric and combine, and be processed into the seal of various shapes, this is the tack of expanded graphite.Expansion multiple is larger, and its tack is better, and the seal quality of compacting is higher.Flexible graphite sealing material has following premium properties:
1, there is good elasticity and pliability, in use can Yin Wendu, pressure changes or the factor such as vibrations and cause leakage.Thereby soft graphite can reach safe and reliable as encapsulant.
2, heat resistance is good, and it is 200 ℃ that low temperature can be applicable to, and high temperature can be used 680 ℃ in Oxidant, in non-oxygen medium, may be used on 2000 ℃, and can keep its good sealing.
3, chemical resistance is good.Can Long Term Contact acid, alkali, salt and organic solvent (except the acid of strong oxidizing property, as outer in some certain concentration of nitric acid, chromic acid, oleum, halogen) and be not corroded.
4, gas and liquid are had to good impermeability.
5, radiation-resistant property is stable.
6, coefficient of friction is lower and self-lubricating property is good.
7, heat and electric conduction have obvious anisotropy.
8, long service life.
But present flexible graphite sealing material comes with some shortcomings, present flexible graphite sealing material is due to after modification, owing to having increased flexibility, overcome native graphite crisp and frangible, the shortcoming that impact resistance is poor, but can produce on the other hand runny characteristic, therefore for the sealing place of some super-pressure, when pressure is high, easily produce the phenomenon that flexible graphite sealing material is forced out or squeezes away, therefore with existing flexible graphite sealing material, for the sealing place of some super-pressure, still can not reach and guarantee sealing effectiveness completely, for head it off, there is a kind of method that increases reticulated interlayer in flexible graphite sealing material, with this, improve soft graphite and bear high pressure high vacuum performance.But existing is all the reticulated interlayer being lining into, and employing is that gluing mode is combined to form, so still exist adhesive when HTHP, can produce some for sealing adverse influence, cause the change of sealing property, so and be necessary this to be improved.
Summary of the invention
Object of the present invention is exactly to have the deficiency high temperature resistant, super-pressure is poor for existing flexible graphite sealing material, a kind of new flexible graphite sealing combination mat preparation method and products thereof is provided, this kind of flexible graphite sealing material and sealing gasket preparation method, high temperature resistant, the high-voltage performance that can improve flexible graphite sealing material improve sealing gasket process for making simultaneously.
The object of the invention is to be achieved through the following technical solutions, a kind of flexible graphite sealing combined material preparation method, adopt layer flexible graphite stack combinations mode to make encapsulant, it is characterized in that, between every two layers of flexible graphite, lay the barbed wire netting of one deck two sides band, by wire netting being adopted to Electromagnetic Heating mode Fast Heating, and when wire netting is heated to 850-950 ℃, soft graphite and wire netting composite bed are pressurizeed, and pressurization specific pressure can be at 200KG/CM
2to 500 KG/CM
2between choose, the hangnail on wire netting is caught in the top layer of soft graphite layer near wire netting, form a whole encapsulant, then allow whole encapsulant naturally cool to normal temperature, make layer flexible graphite stack combinations encapsulant.
A sealing gasket preparation method of utilizing the layer flexible graphite stack combinations encapsulant of said method making, at least comprises the following steps:
1) make encapsulant: the encapsulant of suitable thickness will be made according to the method described above, be then placed under stamping machine, stamp out as required pie seal block;
2) sealing gasket is set up with the metallic sheath that Cr20Ni80 makes;
3) cover there is is the sealing gasket of metallic sheath be placed on roller press, utilize roll squeezer to carry out roll extrusion to metallic sheath, make metallic sheath to in-flanges, respectively from encasing up and down the outside of sealing gasket, form a kind of sealing gasket with metal hemming edge.
The invention has the beneficial effects as follows: the present invention is by laying the barbed wire netting of one deck two sides band between soft graphite, and make soft graphite top layer waddingization by electromagnetism Fast Heating, by pressurization, make the hangnail of wire netting catch on soft graphite waddingization top layer again, become an integral body, can reduce the method at soft graphite top layer gluing like this, avoid the sex change of sizing material under HTHP, method simple possible, can meet high temperature resistant, the high-voltage performance requirement of flexible graphite sealing material completely.The sealing gasket that adopts above-mentioned material to make has feature high temperature resistant, high pressure, and heatproof can reach 1200-1500 ℃, completely can replace imported packing ring.
accompanying drawing explanation
Fig. 1 is the embodiment of the present invention one seal combination material structure schematic diagram;
Fig. 2 is the embodiment of the present invention two seal combination material structure schematic diagrames;
Fig. 3 is the embodiment of the present invention three seal combination material structure schematic diagrames;
In figure: 1, soft graphite layer, 2, soft graphite layer, 3, soft graphite layer, 4, wire netting, 5, hangnail, 6, soft graphite layer, 7, soft graphite layer.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention will be further described.
Embodiment mono-
A kind of flexible graphite sealing combined material preparation method, adopt layer flexible graphite stack combinations mode to make encapsulant, it is characterized in that, between every two layers of flexible graphite, lay the barbed wire netting of one deck two sides band, by wire netting being adopted to Electromagnetic Heating mode Fast Heating, and when wire netting is heated to 850-950 ℃, soft graphite and wire netting composite bed are pressurizeed, pressurization specific pressure can be at 200KG/CM
2to 500 KG/CM
2between choose, the hangnail on wire netting is caught in the top layer of soft graphite layer near wire netting, form a whole encapsulant, then allow whole encapsulant naturally cool to normal temperature, make layer flexible graphite stack combinations encapsulant.
A kind of flexible graphite sealing combined material proposing according to said method as shown in Figure 1, comprise three layers of soft graphite layer 1,2 and 3, and between every double-layer flexible graphite linings, be covered with the barbed wire netting 4 of two sides band, the hangnail 5 on wire netting 4 two sides catches on respectively in the soft graphite layer top layer on two sides, makes soft graphite layer become as a whole with wire netting.
Embodiment bis-
The preparation method of embodiment bis-is the same with embodiment mono-, just as shown in Figure 2, the soft graphite layer adopting is five layers, on the basis of embodiment mono-, increased one deck 6, between every double-layer flexible graphite linings, be covered with equally the barbed wire netting 4 of two sides band, the hangnail 5 on wire netting 4 two sides catches on respectively in the soft graphite layer top layer on two sides, makes soft graphite layer become as a whole with wire netting.
Embodiment tri-
Embodiment tri-is a kind of method of utilizing the material making sealing gasket of said method making, sealing gasket material preparation method used is the same with embodiment bis-, the soft graphite layer adopting is five layers, as shown in Figure 3, on the basis of embodiment mono-, increased one deck 6, between every double-layer flexible graphite linings, be covered with equally the barbed wire netting 4 of two sides band, the hangnail 5 on wire netting 4 two sides catches on respectively in the soft graphite layer top layer on two sides, makes soft graphite layer become as a whole with wire netting.After material is made, then carry out the making of sealing gasket; The making of described sealing gasket at least comprises the following steps:
1) make encapsulant: the encapsulant of suitable thickness will be made according to the method described above, be then placed under stamping machine, stamp out as required pie seal block;
2) sealing gasket is set up with the metallic sheath that Cr20Ni80 makes;
3) cover there is is the sealing gasket of metallic sheath be placed on roller press, utilize roll squeezer to carry out roll extrusion to metallic sheath, make metallic sheath to in-flanges, respectively from encasing up and down the outside of sealing gasket, form a kind of sealing gasket with metal hemming edge.
Claims (1)
1. a flexible graphite sealing combined material and sealing gasket preparation method, adopt layer flexible graphite stack combinations mode to make encapsulant, it is characterized in that, between every two layers of flexible graphite, lay the barbed wire netting of one deck two sides band, by wire netting being adopted to Electromagnetic Heating mode Fast Heating, and when wire netting is heated to 850-950 ℃, soft graphite and wire netting composite bed are pressurizeed, pressurization specific pressure is at 200KG/CM
2to 500 KG/CM
2between choose, the hangnail on wire netting is caught in the top layer of soft graphite layer near wire netting, form a whole encapsulant, then allow whole encapsulant naturally cool to normal temperature, make layer flexible graphite stack combinations encapsulant; The making of described sealing gasket at least comprises the following steps:
1) make encapsulant: the encapsulant of suitable thickness will be made according to the method described above, be then placed under stamping machine, stamp out as required pie seal block;
2) sealing gasket is set up with the metallic sheath that Cr20Ni80 makes;
3) cover there is is the sealing gasket of metallic sheath be placed on roller press, utilize roller press to carry out roll extrusion to metallic sheath, make metallic sheath to in-flanges, respectively from encasing up and down the outside of sealing gasket, form a kind of sealing gasket with metal hemming edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110193442.9A CN102285164B (en) | 2011-07-12 | 2011-07-12 | Method for manufacturing composite flexible graphite sealing material and sealing gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110193442.9A CN102285164B (en) | 2011-07-12 | 2011-07-12 | Method for manufacturing composite flexible graphite sealing material and sealing gasket |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102285164A CN102285164A (en) | 2011-12-21 |
| CN102285164B true CN102285164B (en) | 2014-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110193442.9A Expired - Fee Related CN102285164B (en) | 2011-07-12 | 2011-07-12 | Method for manufacturing composite flexible graphite sealing material and sealing gasket |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103358616B (en) * | 2012-03-31 | 2015-08-19 | 抚顺吉顺机械设备制造有限公司 | The manufacture method of metal compound flexible graphite gasket |
| CN107363190A (en) * | 2017-06-28 | 2017-11-21 | 太仓市凯诺石墨密封制品有限公司 | A kind of preparation technology of high-intensity sealing type graphite Composition spacer |
| CN107642609B (en) * | 2017-09-22 | 2020-04-14 | 慈溪市春潮密封件有限公司 | Self-reinforced flexible sealing gasket |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2133719Y (en) * | 1992-11-18 | 1993-05-19 | 国营五二六厂 | High-performance sealed spacer |
| CN2544143Y (en) * | 2002-07-02 | 2003-04-09 | 张洪庆 | Metal edged teflom seal gasket with high-strength sandwich graphite |
| CN1696546A (en) * | 2004-05-14 | 2005-11-16 | 宁波天生密封件有限公司 | Sealing gasket and manufacturing method |
| CN201066003Y (en) * | 2007-07-09 | 2008-05-28 | 辽宁辽兴石油机械有限公司 | High pressure pipe sealing connection device and sealing gasket |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2897299B1 (en) * | 2006-02-10 | 2008-05-23 | Carbone Lorraine Composants So | FLEXIBLE GRAPHITE / METAL MULTILAYER SEALING SEALS ADAPTED TO HIGH TEMPERATURE SERVICE CONDITIONS. |
-
2011
- 2011-07-12 CN CN201110193442.9A patent/CN102285164B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2133719Y (en) * | 1992-11-18 | 1993-05-19 | 国营五二六厂 | High-performance sealed spacer |
| CN2544143Y (en) * | 2002-07-02 | 2003-04-09 | 张洪庆 | Metal edged teflom seal gasket with high-strength sandwich graphite |
| CN1696546A (en) * | 2004-05-14 | 2005-11-16 | 宁波天生密封件有限公司 | Sealing gasket and manufacturing method |
| CN201066003Y (en) * | 2007-07-09 | 2008-05-28 | 辽宁辽兴石油机械有限公司 | High pressure pipe sealing connection device and sealing gasket |
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| Publication number | Publication date |
|---|---|
| CN102285164A (en) | 2011-12-21 |
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