CN103993316B - Enamel heat transfer element and enameling method thereof - Google Patents
Enamel heat transfer element and enameling method thereof Download PDFInfo
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- CN103993316B CN103993316B CN201410168861.0A CN201410168861A CN103993316B CN 103993316 B CN103993316 B CN 103993316B CN 201410168861 A CN201410168861 A CN 201410168861A CN 103993316 B CN103993316 B CN 103993316B
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Abstract
The invention discloses an enamel heat transfer element and an enameling method thereof. The enameling method comprises the following steps: 1, dipping enameling: dipping a heat transfer element blank in a glaze slip cylinder, and lifting up the blank at a uniform speed; 2, scraping: rolling a roller at the lower portion of the heat transfer element blank, and scraping the glaze slip accumulated at the lower portion of the heat transfer element blank; 3, drying: drying the heat transfer element blank in an annular drying furnace; 4, electrostatic spraying edge supplementation: putting the completely dried heat transfer element blank in an electrostatic spraying room, and carrying out enamel static powder spraying wrapping on the edge of the blank by using an electrostatic spray gun; and 5, sintering: sintering the sprayed heat transfer element blank in a sintering furnace, taking the sintered element out of the sintering furnace, and cooling. The enameling method has the advantages of high production efficiency, good enameling effect, well wrapped edges and groove, low equipment investment, and production cost saving; and the expansion coefficient of enamel is reasonable, and no edge enamel layer explosion phenomenon no long appears after the high temperature sintering and cooling.
Description
Technical field
The present invention relates to a kind of enamelling method and in particular to a kind of enamelling method of enamel heat transfer element and pass through the application of slip
The enamel heat transfer element that method prepares, belongs to application of slip technical field.
Background technology
At present for the enameling process of heat transfer element, domestic main use two kinds：
One is electrostatic dust coat method, and electrostatic dust coat is exactly the principle using Electrostatic Absorption, using electrostatic gun,
Make electrostatic on treated enamel particle band, then adsorb on metalwork.But the deficiency of this method is, in heat exchange unit
The groove power line of part can ratio sparse, formed faraday cup so that vitreous enamel is difficult to application of slip enameling glaze in groove,
Thus causing defect herein.Chinese patent 200720102623.5 discloses an a kind of electrostatic spraying heat transfer element, in gold
Belong to electrostatic spraying enamel layer on matrix surface, the structure of enamel layer is finer and close than secondary enamelling method cover-coat enamel.
Two is wet-process enamelling method, and wet-process enamelling is exactly that enamel uses water as medium, enamel is suspended in water, is allowed to
Form a kind of material of pulpous state, the glaze slip of meaning, this glaze slip has certain fluidity and stops degree, then using impregnating or
Spraying method be allowed to be attached to heat transfer element surface, dipping method be by workpiece immerse glaze slip in again lift recycling turn, get rid of,
The action such as flutter, pause by its coating uniform, but this method efficiency is low, pure craft, its quality depends on the technical merit of workman
Just, its edge of enamel heat transfer element that this method makes does not have enamel layer to wrap up substantially, in application corrosion can take the lead in from
The edge that these do not wrap up enamel layer starts, thus eroding full wafer enamel heat transfer element.
In recent years, there are the enamelling method that wet spray is combined, Chinese patent 201110098300.4 with electrostatic dry method
Disclose a kind of wet-dry change to combine the preparation method of enamel heat exchanger, using first wet method electrostatic dry spraying once-firing again,
The advantage combining wet method, dry method, overcoming dry, wet method shortcoming makes enamel heat transfer element physicochemical property, quality significantly improve.
The Chinese patent 201110377565.8 of our unit's application discloses a kind of enamelling method of enamel heat transfer element, using electrostatic
Rifle sprays electrostatic powder to the surface of heat transfer element, and the electrostatic dry spraying such as the groove of matrix, depression is difficult the place being sprayed onto
Using the main method of wet spray, the parcel rate completely of heat transfer element enamel layer improves further.
The enamelling method of above-mentioned several enamel heat transfer element, respectively has its shortcoming：There is the local spray such as groove in electrostatic spray
Apply less than problem；Wet spray has that edge lacks enamel layer parcel and inefficiency；Wet-dry change glaze is difficult
Join, production efficiency is not high, wet spray at groove need substantial amounts of artificial, simultaneously its electrostatic powder still rely at present into
Mouthful, high cost.
Content of the invention
It is an object of the invention to overcoming the deficiencies in the prior art, provide a kind of production efficiency high and heat transfer element edge bag
Wrap up in a kind of enamelling method of the good enamel heat transfer element of effect.
The present invention is achieved through the following technical solutions：
A kind of enamelling method of enamel heat transfer element, including following step：
（1）Leaching is warded off：The heat transfer element blank treating the application of slip processing through degreasing and rust removal is submerged in glaze slip cylinder, Ran Houzai
At the uniform velocity lifted with the speed of 0.5～1 meter per second；
（2）Scraping：Rolled in heat transfer element blank bottom using the cylinder that a surface wrap has fluffy plastic wire, will pass
The glaze slip that thermal element blank bottom heaps strikes off；
（3）Dry：By step（2）In heat transfer element blank be placed in less than 150 DEG C of ring drying oven and dry；
（4）Side is mended in electrostatic spraying：The heat transfer element being completely dried blank is placed in electrostatic spraying room, with electrostatic gun to it
Edge carries out enamel electrostatic powder coating bound edge；
（5）Sintering：Heat transfer element blank after spraying is placed in firing furnace, burns till more than 800 DEG C 2 ~ 10 minutes, go out
Stove cools down.
Wherein, step（1）In glaze slip be by by enamel, clay, borax, natrium nitrosum, quartz sand, water and carboxymethyl
Obtained from the suspension that sodium cellulosate mixed grinding is 25～35 microns to D50, wherein, every 100 kilograms of enamel, mixes 5
～7 kilograms of clays, 0.1～0.4 kilogram of borax, 0.05～0.3 kilogram of natrium nitrosum, 5～7 kilograms of quartz sands, 40～50 kilograms
Water and 0.01～0.1 kilogram of sodium carboxymethylcellulose.
In described glaze slip, enamel is made up of the raw material of following percetage by weight： SiO250%～70%, Al2O3
0.5%～3%, B2O35%～15%, CaO 0.5%～3%, F20.5%～3%, K20.5%～3%, Na2O 8%～15%, CoO
0%～3%, CuO 0.5%～3%, TiO23%～10%, MnO 0.5%～3%, Li2O 1%～5%, NiO 0.5%～3% and ZrO
1%～3%, the summation of described component adds up as 100 weight %, by described raw material mix uniformly, in 1200～1300 DEG C of high temperature
Lower melting 2～3 hours, then quick refrigeration of coming out of the stove obtains enamel to room temperature.
Wherein, step（4）The electrostatic powder of middle spraying is through the following steps that obtain：By enamel and enamel weight 0.01
~ 0.5% methyl-monosilane mixing is placed in dry ball and is ground to D50 for 20～30 microns.
In described electrostatic powder, enamel is made up of the raw material of following percetage by weight：SiO255%～75%, Al2O3
1.5%～5%, B2O33%～10%, CaO 0.5%～3%, F20.5%～3%, K20.5%～3%, Na2O 4%～15%, CoO
0%～3%, CuO 0.5%～3%, TiO23%～10%, MnO 0.5%～3%, Li2O 1%～5%, NiO 0.5%～3% and ZrO
1%～3%, the summation of described component adds up as 100 weight %.By described raw material mix uniformly, in 1280～1300 DEG C of high temperature
Lower melting 2～3 hours, then quick refrigeration of coming out of the stove obtains enamel to room temperature.Wherein, the coefficient of volume expansion of enamel be 300 ~ 350 ×
10-7.
The enamel heat transfer element being obtained according to described enamelling method.
The invention has the beneficial effects as follows：
The present invention is improved on the basis of the dipping method of wet-process enamelling porcelain, mainly improves component and the flowing of glaze slip
Performance, allows it have when leaching is warded off the uniform ability that self flows, and does not need a lot of actions in dipping enamelling by coating
Homogenization, the glaze slip coating on enamel elements blank only needs to the simplified approach lifting again using dipping workpiece, enamel elements base
Glaze slip coating on part can flow uniformly under self gravitation, and unnecessary glaze slip is then dropped in glaze stock tank, so can be so that applying
Layer uniformly, solves wet-process enamelling edge using improved special bound edge electrostatic enamel powder spray edge simultaneously and wraps up not
Good problem.
The enamelling method production efficiency of the present invention is high, and application of slip effect is good, and edge and groove all can be good at wrapping up, equipment
Investment is low, saves production cost；Rationally, cool down after high temperature burns till also is not in edge to the coefficient of expansion of enamel again
Enamel layer burst porcelain phenomenon.
Specific embodiment
Embodiment 1
A kind of enamelling method of enamel heat transfer element, including following step：
（1）Leaching is warded off：The heat transfer element blank treating the application of slip processing through degreasing and rust removal is submerged in glaze slip cylinder, Ran Houzai
At the uniform velocity lifted with the speed of 0.5 meter per second；Blank is submerged in glaze slip cylinder, then at the uniform velocity lifts again, now unnecessary glaze slip meeting
Voluntarily trickle under gravity, one layer of finally only very thin glaze slip can be attached to the surface of heat transfer element；
（2）Scraping：Rolled in heat transfer element blank bottom using the cylinder that a surface wrap has fluffy plastic wire, will pass
The glaze slip that thermal element blank bottom heaps strikes off；Heat transfer element blank through leaching ward off after bottom margin have glaze slip heap, this be because
The reason for surface tension.Rolled in workpiece bottom using the cylinder that a surface wrap has fluffy plastic wire, bottom is heaped
Glaze slip strike off it is ensured that on heat transfer element blank adhere to glaze slip uniformity；
（3）Dry：By step（2）In heat transfer element blank be placed in 120 DEG C of ring drying oven and dry；
（4）Side is mended in electrostatic spraying：The heat transfer element being completely dried blank is placed in electrostatic spraying room, with electrostatic gun to it
Edge carries out enamel electrostatic powder coating bound edge；
（5）Sintering：Heat transfer element blank after spraying is placed in firing furnace, burns till 10 minutes at 800 DEG C, come out of the stove cold
But.
Wherein, step（1）In glaze slip be by by enamel, clay, borax, natrium nitrosum, quartz sand, water and carboxymethyl
Obtained from the suspension that sodium cellulosate mixed grinding is 30 microns to D50, wherein, every 100 kilograms of enamel, mixes 5 kilograms
Clay, 0.4 kilogram of borax, 0.3 kilogram of natrium nitrosum, 7 kilograms of quartz sands, 40 kg of water and 0.01 kilogram of carboxymethylcellulose calcium
Sodium.
In described glaze slip, enamel is made up of the raw material of following percetage by weight： SiO250%、Al2O33%、B2O3
9%、CaO 0.5%、F20.5%、K23% 、Na2O 15%、CoO 3%、CuO 0.5%、TiO210%、MnO 0.5%、Li2O 1% 、
NiO 3% and ZrO 1%, the summation of described component adds up as 100 weight %, by described raw material mix uniformly, in 1260 DEG C of height
Temperature is lower to be melted 2 hours, then quick refrigeration of coming out of the stove obtains enamel to room temperature.
Wherein, step（4）The electrostatic powder of middle spraying is through the following steps that obtain：By enamel and enamel weight
0.01% methyl-monosilane mixing is placed in dry ball and is ground to D50 for 26 microns.
In described electrostatic powder, enamel is made up of the raw material of following percetage by weight：SiO275%、Al2O3
1.5%、B2O33%、CaO 0.5% 、F23% 、K23% 、Na2O 4%、CoO 0%、CuO 3%、TiO23%、MnO 0.5%、
Li2O 1%, NiO 0.5% and ZrO 2%, the summation of described component adds up as 100 weight %.By described raw material mix uniformly,
Melt 2 hours under 1300 DEG C of high temperature, then quick refrigeration of coming out of the stove obtains enamel to room temperature.Wherein, the coefficient of volume expansion of enamel
For 300 × 10-7.
Embodiment 2
A kind of enamelling method of enamel heat transfer element, including following step：
（1）Leaching is warded off：The heat transfer element blank treating the application of slip processing through degreasing and rust removal is submerged in glaze slip cylinder, Ran Houzai
At the uniform velocity lifted with the speed of 1 meter per second；
（2）Scraping：Rolled in heat transfer element blank bottom using the cylinder that a surface wrap has fluffy plastic wire, will pass
The glaze slip that thermal element blank bottom heaps strikes off；
（3）Dry：By step（2）In heat transfer element blank be placed in 110 DEG C of ring drying oven and dry；
（4）Side is mended in electrostatic spraying：The heat transfer element being completely dried blank is placed in electrostatic spraying room, with electrostatic gun pair
Its edge carries out enamel electrostatic powder coating bound edge；
（5）Sintering：Heat transfer element blank after spraying is placed in firing furnace, burns till 2 minutes at 1000 DEG C, come out of the stove cold
But.
Wherein, step（1）In glaze slip be by by enamel, clay, borax, natrium nitrosum, quartz sand, water and carboxymethyl
Obtained from the suspension that sodium cellulosate mixed grinding is 25 microns to D50, wherein, every 100 kilograms of enamel, mixes 7 kilograms
Clay, 0.1 kilogram of borax, 0.05 kilogram of natrium nitrosum, 5 kilograms of quartz sands, 50 kg of water and 0.1 kilogram of carboxymethylcellulose calcium
Sodium.
In described glaze slip, enamel is made up of the raw material of following percetage by weight：SiO270%、Al2O30.5%、B2O3
5%、CaO 3% 、F23% 、K20.5% 、Na2O 8%、CoO 0%、CuO 2%、TiO23%、MnO 1%、Li2O 2% 、NiO
0.5% and ZrO 1.5%, the summation of described component adds up as 100 weight %.By described raw material mix uniformly, in 1200 DEG C of height
Temperature is lower to be melted 3 hours, then quick refrigeration of coming out of the stove obtains enamel to room temperature.
Wherein, step（4）The electrostatic powder of middle spraying is through the following steps that obtain：By enamel and enamel weight 0.5%
Methyl-monosilane mixing be placed in dry ball be ground to D50 be 20 microns.
In described electrostatic powder, enamel is made up of the raw material of following percetage by weight：SiO255%、Al2O35%、
B2O310%、CaO 3% 、F20.5% 、K20.5% 、Na2O 8%、CoO 3%、CuO 0.5%、TiO24%、MnO 3%、Li2O
5%th, NiO 1.5% and ZrO 1%, the summation of described component adds up as 100 weight %.By described raw material mix uniformly, 1200
DEG C high temperature under melt 3 hours, then quick refrigeration of coming out of the stove obtains enamel to room temperature.Wherein, the coefficient of volume expansion of enamel be 350 ×
10-7.
Embodiment 3
A kind of enamelling method of enamel heat transfer element, including following step：
（1）Leaching is warded off：The heat transfer element blank treating the application of slip processing through degreasing and rust removal is submerged in glaze slip cylinder, Ran Houzai
At the uniform velocity lifted with the speed of 0.8 meter per second；
（2）Scraping：Rolled in heat transfer element blank bottom using the cylinder that a surface wrap has fluffy plastic wire, will pass
The glaze slip that thermal element blank bottom heaps strikes off；
（3）Dry：By step（2）In heat transfer element blank be placed in 150 DEG C of ring drying oven and dry；
（4）Side is mended in electrostatic spraying：The heat transfer element being completely dried blank is placed in electrostatic spraying room, with electrostatic gun to it
Edge carries out enamel electrostatic powder coating bound edge；
（5）Sintering：Heat transfer element blank after spraying is placed in firing furnace, burns till 6 minutes at 900 DEG C, cooling of coming out of the stove.
Wherein, step（1）In glaze slip be by by enamel, clay, borax, natrium nitrosum, quartz sand, water and carboxymethyl
Obtained from the suspension that sodium cellulosate mixed grinding is 35 microns to D50, wherein, every 100 kilograms of enamel, mixes 6 kilograms
Clay, 0.3 kilogram of borax, 0.15 kilogram of natrium nitrosum, 6 kilograms of quartz sands, 46 kg of water and 0.07 kilogram of carboxymethylcellulose calcium
Sodium.
In described glaze slip, enamel is made up of the raw material of following percetage by weight： SiO251%、Al2O32%、B2O3
15%、CaO 1% 、F21% 、K21% 、Na2O 9%、CoO 1%、CuO 3%、TiO24%、MnO 3%、Li2O 5% 、NiO 1%
With ZrO 3%, the summation of described component adds up as 100 weight %.By described raw material mix uniformly, molten under 1300 DEG C of high temperature
Melt 2.4 hours, then quick refrigeration of coming out of the stove obtains enamel to room temperature.
Wherein, step（4）The electrostatic powder of middle spraying is through the following steps that obtain：By enamel and enamel weight
0.34% methyl-monosilane mixing is placed in dry ball and is ground to D50 for 30 microns.
In described electrostatic powder, enamel is made up of the raw material of following percetage by weight：SiO256%、Al2O32%、
B2O34%、CaO 1% 、F21% 、K21% 、Na2O 15%、CoO 0.5%、CuO 1%、TiO210%、MnO 1%、Li2O 1.5%
, NiO 3% and ZrO 3%, the summation of described component adds up as 100 weight %.By described raw material mix uniformly, at 1290 DEG C
Melt 2.2 hours under high temperature, then quick refrigeration of coming out of the stove obtains enamel to room temperature.Wherein, the coefficient of volume expansion of enamel be 320 ×
10-7.
Claims (4)
1. a kind of enamelling method of enamel heat transfer element is it is characterised in that include following step：
（1）Leaching is warded off：The heat transfer element blank treating the application of slip processing through degreasing and rust removal is submerged in glaze slip cylinder, then again with
The speed of 0.5～1 meter per second at the uniform velocity lifts；
（2）Scraping：Rolled in heat transfer element blank bottom using the cylinder that a surface wrap has fluffy plastic wire, unit of conducting heat
The glaze slip that part blank bottom heaps strikes off；
（3）Dry：By step（2）In heat transfer element blank be placed in less than 150 DEG C of ring drying oven and dry；
（4）Side is mended in electrostatic spraying：The heat transfer element being completely dried blank is placed in electrostatic spraying room, with electrostatic gun to its edge
Carry out enamel electrostatic powder coating bound edge；
（5）Sintering：Heat transfer element blank after spraying is placed in firing furnace, burns till more than 800 DEG C 2 ~ 10 minutes, go out
Stove cools down；
Step（1）In glaze slip be by by enamel, clay, borax, natrium nitrosum, quartz sand, water and sodium carboxymethylcellulose
Obtained from the suspension that mixed grinding is 25～35 microns to D50, wherein, every 100 kilograms of enamel, mixes 5～7 kilograms
Clay, 0.1～0.4 kilogram of borax, 0.05～0.3 kilogram of natrium nitrosum, 5～7 kilograms of quartz sands, 40～50 kg of water and 0.01
～0.1 kilogram of sodium carboxymethylcellulose.
2. a kind of enamelling method of enamel heat transfer element according to claim 1 is it is characterised in that step（4）Middle spraying
Electrostatic powder through the following steps that obtain：The methyl-monosilane mixing of enamel and enamel weight 0.01 ~ 0.5% is placed in
It is ground to D50 in dry ball and be 20～30 microns.
3. a kind of enamelling method of enamel heat transfer element according to claim 2 is it is characterised in that described step（4）In
Enamel the coefficient of volume expansion be 300 × 10-7~350×10-7.
4. the enamel heat transfer element that the enamelling method according to any one of claim 1-3 prepares.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105036556A (en) * | 2015-07-06 | 2015-11-11 | 昆山美邦环境科技有限公司 | Acid resistant enamel slip, and method using slip to make enamel product |
| CN108203244B (en) * | 2016-12-17 | 2022-02-08 | 江西科盛环保股份有限公司 | Preparation method of double-sided enamel anti-scaling static dry powder for common cold-rolled and hot-rolled plates |
| CN107121006A (en) * | 2017-06-06 | 2017-09-01 | 昆山美邦环境科技股份有限公司 | Dual anti-corrosion weathering steel enamel heat transfer element and preparation method thereof |
| CN108823568B (en) * | 2018-05-24 | 2020-04-07 | 常熟市南湖化工设备制造有限责任公司 | Energy-saving production process of glass lining stirrer |
| CN114215839A (en) * | 2021-11-29 | 2022-03-22 | 格力电器（武汉）有限公司 | Liner riveting structure, manufacturing method thereof and steaming and baking machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0089418A1 (en) * | 1982-03-19 | 1983-09-28 | Ferro Corporation | The process of enamelling cold-rolled steel sheet suitable for enamelling with a base coat and a cover coat layer, as well as articles enamelled according to such a process |
| CN102181863A (en) * | 2011-04-20 | 2011-09-14 | 合肥翰林搪瓷有限公司 | Method for manufacturing enamel heat exchanger by combing dry method with wet method |
| CN102392245A (en) * | 2011-11-24 | 2012-03-28 | 昆山美邦搪瓷有限公司 | Enamelling method of enamel heat transfer element |
| CN102953060A (en) * | 2011-10-13 | 2013-03-06 | 四会市维力有限公司 | Method for preparing enameled air conditioner bracket |
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2014
- 2014-04-25 CN CN201410168861.0A patent/CN103993316B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0089418A1 (en) * | 1982-03-19 | 1983-09-28 | Ferro Corporation | The process of enamelling cold-rolled steel sheet suitable for enamelling with a base coat and a cover coat layer, as well as articles enamelled according to such a process |
| CN102181863A (en) * | 2011-04-20 | 2011-09-14 | 合肥翰林搪瓷有限公司 | Method for manufacturing enamel heat exchanger by combing dry method with wet method |
| CN102953060A (en) * | 2011-10-13 | 2013-03-06 | 四会市维力有限公司 | Method for preparing enameled air conditioner bracket |
| CN102392245A (en) * | 2011-11-24 | 2012-03-28 | 昆山美邦搪瓷有限公司 | Enamelling method of enamel heat transfer element |
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Effective date of registration: 20210915 Address after: 215513 building 4, No. 2, Jianye Road, high tech Industrial Park, Changshu Economic and Technological Development Zone, Suzhou City, Jiangsu Province Patentee after: Suzhou meiyubang Environmental Technology Co.,Ltd. Address before: 215316 No. 2599, Huanqing Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Patentee before: KUNSHAN MULTI BEAUTY ET Co.,Ltd. |