CN1987318A - Continuous firing furnace - Google Patents
Continuous firing furnace Download PDFInfo
- Publication number
- CN1987318A CN1987318A CN 200510132268 CN200510132268A CN1987318A CN 1987318 A CN1987318 A CN 1987318A CN 200510132268 CN200510132268 CN 200510132268 CN 200510132268 A CN200510132268 A CN 200510132268A CN 1987318 A CN1987318 A CN 1987318A
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- China
- Prior art keywords
- heating part
- workpiece
- main body
- conveying
- control device
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000010304 firing Methods 0.000 title claims description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 40
- 238000001816 cooling Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 230000008602 contraction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
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Abstract
The invention is in use for preventing warp of work pieces from occurring caused by moving work pieces to pass through place where there is larger change of temperature gradient. The continual burning furnace includes main body, delivery mechanism, and control device. There are heating part and cooling part in the main body from entrance to exit. The delivery mechanism is in use for transporting workpieces, which pass through the heating part and cooling part in sequence in the transporting procedure. The control device is in use for controlling the delivery mechanism. Thus, workpieces are transported in high speed at least in course from time when front end of the work piece is near to the entrance of the heating part till to the time when back end of the work piece passes through the exit of the heating part. Hereafter, work pieces are transported in low speed.
Description
Technical field
A kind of continuous firing furnace involved in the present invention, it is used for the ablating work procedure of flat-panel display panels such as Production Example such as plasma display device etc.
Background technology
In the past, known continuous firing furnace as described above had furnace main body, conveying device and control device.In described furnace main body, from the inlet in the stove to gone out interruption-forming heating part and cooling end, described conveying device is used for conveying workpieces, workpiece in being transferred process successively through heating part and cooling end, described control device is controlled conveying device, so that the transporting velocity of workpiece becomes changeless speed (for example referring to Japanese documentation 1, the spy opens the 2003-28632 communique) from the inlet in the stove to outlet.
In above-mentioned continuous firing furnace in the past, the heating part inlet is that the interior thermograde of stove changes position greatly with the heating part outlet.When workpiece had thermograde part as described above and moves, for example, when being in the heating part and its rear portion in the front portion of workpiece and being in outside the heating part, the front and rear of workpiece will produce the bigger temperature difference.This situation becomes the main cause that workpiece produces warpage.
Summary of the invention
The object of the present invention is to provide a kind of such continuous firing furnace, it can prevent that workpiece from producing warpage because of moving at thermograde variation position greatly.
Continuous firing furnace of the present invention has furnace main body, conveying device, and control device, in described furnace main body, have heating part and cooling end from the outlet that enters the mouth, described conveying device is used for conveying workpieces, workpiece in the process of carrying successively through heating part and cooling end, described control device is used to control conveying device, at least the moment that closes on the front of heating part inlet in the front portion of workpiece begins in the process till through the heating part inlet of rear portion up to workpiece, conveying workpieces at full speed, after this, after with the low velocity conveying workpieces, at least begin the process till through the heating part outlet of rear portion up to workpiece in the moment of the front of closing on heating part outlet from the front portion of workpiece, at full speed conveying workpieces.
In continuous firing furnace of the present invention,, be to come conveying workpieces with higher speed when workpiece exports when mobile in heating part inlet and heating part that thermograde changes greatly.Therefore, the front portion of workpiece and the temperature difference between the rear portion can be suppressed to irreducible minimum, thereby can prevent that workpiece from producing warpage.
Thus, according to the present invention, can play preventing that workpiece from moving the effect that produces warpage because of the position that changes greatly in thermograde.
Description of drawings
Fig. 1 is the side view of temperature curve in expression baking furnace of the present invention and the stove.
Fig. 2 is that near the workpiece of heating part inlet of above-mentioned baking furnace is carried action specification figure.
Fig. 3 is that near the workpiece of heating part outlet of above-mentioned baking furnace is carried action specification figure.
The specific embodiment
Below, Yi Bian with reference to accompanying drawing, Yi Bian embodiments of the present invention are described.
In the following description, the front and back of being mentioned are meant, before direction one side that the workpiece during with conveying workpieces advances is, after a side opposite with the described direction of an advancing side be.
The temperature profile that shown in Figure 1 is in upwardly extending furnace main body 1 in front and back and corresponding furnace main body.
Baking furnace of the present invention has furnace main body 1, conveying device and control device, and described conveying device is used for conveying workpieces in furnace main body 1, and described control device is used to control the transporting velocity of conveying device.
Be provided with inlet 2 in the rear end of furnace main body 1, be provided with outlet 3 at the front end of body of heater 1.In furnace main body 1,23 heating part and cooling end have been formed to outlet from entering the mouth.The heating part is divided into preheating zone, the main thermal treatment zone and cooling zone gradually.
Conveying device has the conveying roller of a plurality of levels, they in furnace main body 1 along throughput direction with the mode that separates certain intervals arranged side by side (referring to Fig. 2 and Fig. 3).Drive conveying roller by rotation, plate workpiece (also comprising control point adjustment sometimes) is fed forward.
Export with the inlet of the heating part shown in the I with the heating part shown in the O, be that thermograde changes position greatly, promptly, the front of heating part inlet I is a normal temperature, it is changeless horizontal gradient, but one through heating part inlet I, and its thermograde promptly becomes and the corresponding heating gradient that rises to the right in preheating zone.On the other hand, in the front of heating part outlet O, though thermograde be and the corresponding cooling gradient that descends to the right in cooling zone gradually,, one promptly enters cooling end through heating part outlet O, the gradient variable that this temperature descends gets sharply.
Fig. 2 represents that with the form of ideograph near the workpiece the heating part inlet I carries the figure of action.Control device has the 1st sensor 11 and the 2nd sensor 12.The 1st sensor 11 is set at the front of the boundary in normal temperature district and preheat temperature district.The 2nd sensor 12 is positioned at the downstream of this boundary, and be set at from this boundary count, than on the forward slightly position, the position of the length of the fore-and-aft direction that is substantially equal to workpiece W.And one side is disposing the 1st roller group 21 in the upstream across this boundary, and one side is disposing the 2nd roller group 22 in the downstream.The length of each roller group's 21,22 length and the fore-and-aft direction of workpiece W about equally.Each roller group's 21,22 transporting velocity is by changeable one-tenth high speed of control device or low speed.
Till detecting the front portion of workpiece by first sensor 11, the 2 workpiece W that are transported in the furnace main body 1 are transferred with low speed from entering the mouth.This low speed transporting velocity is for example 50mm/min.In case the 1st sensor 11 detects the front portion of workpiece W, the 1st roller group 21 and the 2nd roller group's 22 transporting velocity is just switched at a high speed at once or after the time delay through regulation.This high speed transporting velocity is 2500～4000mm/min.But described high speed transporting velocity also not only is confined to above-mentioned scope.In a single day transporting velocity is switched at a high speed, and so, workpiece W will promptly be transported to the preheating zone.Be transported to the workpiece W of preheating zone, to be transferred at a high speed, till it being detected by the 2nd sensor 12.But in case the 2nd sensor 12 detects workpiece W, so, its transporting velocity is just switched to low speed from high speed at once or after the time delay of process regulation.After this, in the heating part, workpiece W is transferred down with low speed.But the transporting velocity of workpiece is not limited to above-mentioned pattern.In the course of conveying of workpiece, also can be from low speed to high speed and from a high speed to the combination of repeatedly switching of low speed.For example, also can switch at the turning point of the temperature curve of Fig. 1.
Fig. 3 represents that with the form of ideograph near the workpiece the heating part outlet O carries the figure of action.Near the boundary of the boundary between cold-zone and the cooling zone gradually, and similarly be provided with the 3rd sensor 31 and the 4th sensor 32 near the boundary of the boundary of normal temperature district and preheating zone.In addition, identical with the situation that one side disposes the 1st roller group 21 and one side disposes the 2nd roller group 22 in the downstream in the upstream, one side is provided with the 3rd roller group 41 and one side is provided with the 4th roller group 42 in the downstream in the upstream.The front portion of the workpiece W that is transferred with low speed in the heating part is detected by the 3rd sensor 31, in case detecting workpiece W exists, be positioned at the 3rd roller group 41 and the transporting velocity that is positioned at the 4th roller group 42 of downstream one side of upstream one side, will be switched at a high speed at once or after the time delay through regulation.At this moment, be glass material as workpiece W, the speed of carrying out when being transported to cooling end is switched, and normally carries out after the rearward end that is in the glass pieces in gradually cold has reached the temperature that can not exert an influence to the contraction of glass (for example 350 ℃～400 ℃).Like this, workpiece W will promptly be transported to cooling end in the heating part.The 3rd roller group 41 and the 4th roller group's 42 transporting velocity, the signal that workpiece exists that detects by the 4th sensor 32 is switched into low speed at once or after the time delay through regulation once more.
In the above-described embodiment, furnace main body extends into 1 row at fore-and-aft direction, still, also is same when adopting the structure for example be divided into up and down 2 layers in cooling end.
In addition, the mode of movement that the conveying of roller action was both continuous also can be a mode of movement intermittently.
In addition,, be provided with two sensors in the above-described embodiment and detect existing workpiece, still, also can only detect having or not of workpiece with a sensor in order to switch the transporting velocity of workpiece.
Claims (1)
1. continuous firing furnace, it has furnace main body, conveying device, and control device, in described furnace main body, have heating part and cooling end from the outlet that enters the mouth, described conveying device is used for conveying workpieces, workpiece in the process of carrying successively through heating part and cooling end, described control device is used to control conveying device, at least the moment that closes on the front of heating part inlet in the front portion of workpiece begins in the process till through the heating part inlet of rear portion up to workpiece, conveying workpieces at full speed, after this, after with the low velocity conveying workpieces, at least begin the process till through the heating part outlet of rear portion up to workpiece in the moment of the front of closing on heating part outlet from the front portion of workpiece, at full speed conveying workpieces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005101322681A CN1987318B (en) | 2005-12-22 | 2005-12-22 | Continuous firing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005101322681A CN1987318B (en) | 2005-12-22 | 2005-12-22 | Continuous firing furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1987318A true CN1987318A (en) | 2007-06-27 |
| CN1987318B CN1987318B (en) | 2011-05-11 |
Family
ID=38184204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005101322681A Expired - Fee Related CN1987318B (en) | 2005-12-22 | 2005-12-22 | Continuous firing furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1987318B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839637A (en) * | 2009-03-17 | 2010-09-22 | Tdk株式会社 | Continuous fritting furnace and manufacturing system |
| CN105668187A (en) * | 2014-11-20 | 2016-06-15 | 北新集团建材股份有限公司 | Automatic control system for gypsum board feeding |
-
2005
- 2005-12-22 CN CN2005101322681A patent/CN1987318B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839637A (en) * | 2009-03-17 | 2010-09-22 | Tdk株式会社 | Continuous fritting furnace and manufacturing system |
| CN101839637B (en) * | 2009-03-17 | 2013-01-09 | Tdk株式会社 | Continuous sintering furnace and manufacturing system |
| CN105668187A (en) * | 2014-11-20 | 2016-06-15 | 北新集团建材股份有限公司 | Automatic control system for gypsum board feeding |
| CN105668187B (en) * | 2014-11-20 | 2018-08-14 | 北新集团建材股份有限公司 | A kind of automatic control system of plasterboard into plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1987318B (en) | 2011-05-11 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110511 |