CN204356218U - Muffle furnace field control device - Google Patents
Muffle furnace field control device Download PDFInfo
- Publication number
- CN204356218U CN204356218U CN201420850481.0U CN201420850481U CN204356218U CN 204356218 U CN204356218 U CN 204356218U CN 201420850481 U CN201420850481 U CN 201420850481U CN 204356218 U CN204356218 U CN 204356218U
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- CN
- China
- Prior art keywords
- lagging material
- material cavity
- heating rod
- control device
- hot zone
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Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
- C03B17/06—Forming glass sheets
- C03B17/064—Forming glass sheets by the overflow downdraw fusion process; Isopipes therefor
Abstract
The utility model discloses a kind of muffle furnace field control device, comprise lagging material cavity and heating rod, heating rod passes lagging material cavity along lagging material cavity length direction, and stretch out lagging material cavity both ends of the surface through after lagging material cavity, lagging material cavity face is opening shape to body side; It is cold-zone that heating rod stretches out lagging material cavity both ends of the surface, and it is low hot zone that heating rod is positioned at lagging material cavity middle part, and both sides, low hot zone are high hot zone.Because each district controls separately, the aperture of each heating zone is adjusted by corresponding power of controlled silicon adjusting device, multistage heating heating rod can provide various temperature, thus control the temperature of thermal field distribution in each district, temperature of thermal field is distributed and corresponds to glass sheet temperatures distribution, better meet processing requirement.
Description
Technical field
The utility model relates to sheet glass retort furnace furnace binding field, is specifically related to a kind of muffle furnace field control device.
Background technology
In TFT-LCD glass substrate making processes, glass melt is supplied to the groove be formed in formed refractory body.Melten glass overflows at the top of the groove on main body both sides to form two and half glass sheets, sheet glass flows downward and outside surface subsequently along molding is inside, the drainage plate at two ends bottom molding, converge in the bottom of molding or root, they fuse together formation single glass plate there.
Because drainage plate is lower near furnace wall temperature at molding two ends, also because drainage plate shape can only make of metallic substance especially, heat radiation is very fast, so drainage plate place temperature is lower than molding medium temperature, temperature head causes being the gliding temperature field that centre is high, both sides are low bottom molding.
Molding two bottom sides arranged a heating rod respectively in the past, heating section is identical with molding length, ensures bottom temp, forms a temperature field, but heating rod is general silicon carbide heating rod, the heat distribution of heating section is uniform, and when needing the temperature improving molding two ends, medium temperature also improves simultaneously, cause glass medium temperature higher, glass viscosity reduces, and interior thickness reduces, and affects quality.If ensure sheet glass medium temperature, the low drainage plate place glass that can cause for a long time of that molding two ends temperature produces crystallization, and impact is produced.
Utility model content
For above-mentioned defect or deficiency, the purpose of this utility model is to provide a kind of muffle furnace field control device, can by the thermal field of molding root according to the high mode profile in low two ends, centre, the thermal field of bottom and top are completely cut off simultaneously, make the adjustment bottom molding not affect the heterogeneity phantom on top.
For reaching above object, the utility model takes following technical scheme to be achieved:
Comprise lagging material cavity and heating rod, heating rod passes lagging material cavity along lagging material cavity length direction, and stretches out lagging material cavity both ends of the surface through after lagging material cavity, and lagging material cavity face is opening shape to body side; It is cold-zone that heating rod stretches out lagging material cavity both ends of the surface, and it is low hot zone that heating rod is positioned at lagging material cavity middle part, and both sides, low hot zone are high hot zone.
Described heating rod is silicon carbide heating rod.
The heated length L1 of described low hot zone place silicon carbide heating rod is 500 ㎜ ~ 600mm, and the heated length L2 of high hot zone place silicon carbide heating rod is 1.5 ~ 1.7L1.
Described heating rod carries out the adjustment of electric power aperture with by control silicon.
Described heating rod is isolated by lagging material cavity and other region thermal fields of retort furnace.
Distance between described lagging material cavity and heating rod is less than 100mm.
Compared with the prior art, the beneficial effects of the utility model are:
Muffle furnace field of the present utility model control device, by heating rod is passed lagging material cavity along lagging material cavity (4) length direction, and different temperature sections is set in heating rod, can for the distribution of molding bottom glass temperature, corresponding temperature compensation is provided, middle portion glass temperature is high, and the thermal value of the corresponding part of heating rod is little, and rod surface temperature is low; Both ends glass temperature is low, and the thermal value of the corresponding part of heating rod is large, and rod surface temperature is high.In addition, the cavity that lagging material is formed, ensures that the temperature adjustment of heating rod only affects heat insulation cavity inner, and little to other spacial influences outside, thus is heated evenly when making glass ware forming, improves the quality of products.
Accompanying drawing explanation
Fig. 1 is the utility model muffle furnace field control device structural representation in embodiment.
Fig. 2 is the corresponding relation structural representation of the utility model muffle furnace field control device and molding in embodiment.
In figure, 1 is low hot zone, and 2 is high hot zone, and 3 is cold-zone, and 4 is lagging material cavity, and 5 is molding, and 6 is top thermal field, and 7 is the novel thermal field in bottom.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
As shown in Figure 1, the utility model muffle furnace field control device, comprise lagging material cavity 4 and heating rod, heating rod passes lagging material cavity 4 along lagging material cavity 4 length direction, and stretching out lagging material cavity 4 both ends of the surface through after lagging material cavity 4, lagging material cavity 4 is opening shape towards body side; It is cold forging 3 that heating rod stretches out lagging material cavity 4 both ends of the surface, and it is low hot zone 1 that heating rod is positioned at lagging material cavity 4 middle part, and both sides, low hot zone 1 are high hot zone 2; Wherein, the heated length L1 of described low hot zone 1 place silicon carbide heating rod is 500 ㎜ ~ 600mm, and the heated length L2 of high hot zone 2 place silicon carbide heating rod is 1.5 ~ 1.7L1., wherein heating rod carries out the adjustment of electric power aperture with by control silicon.Cavity and heating rod form a thermal field setting device.Respectively arrange one in molding two bottom sides, be used for being adjusted to body bottom temp field.
In the lagging material cavity of rectangular parallelepiped, insert heating section resistance-variable globars, low heating section resistance is little, and hot arc resistance occurred frequently is large, and same excellent electric current is identical, and the thermal value which provides resistance little is little, and the thermal value that resistance is large is large.Make globars hot arc all in the cavities, electrical power wiring receives two cold section of globars, and control loop adopts power of controlled silicon regulator to carry out aperture adjustment.Judge glass sheet temperatures according to the thickness distribution of sheet glass in use, the size of the corresponding each heating zone of adjustment globars, makes it humidity province each with sheet glass corresponding.Then according to in-furnace temperature and technique need temperature to adjust whole temperature that electric power aperture controls thermal field.
Working process of the present utility model and principle are:
As shown in Figure 2, each thermal field is in the distribution of molding both sides, because molding 5 upper temp height glass is in a liquid state, require that temperature is relatively more even, prevent liquid glass from flowing irregular, the general heating rod in both sides, top and incubation cavity provide uniform heat-field.Bottom temp reduces glass and is tending towards solid-state, due to edge machine, drainage plate etc. affect molding two ends temperature comparatively in the middle of low, thermal field control device of the present utility model is arranged on the both sides bottom retort furnace formed body, separate with lagging material with top thermal field 6, the heterogeneity phantom that bottom provides middle low two ends high, forms the novel thermal field 7 in bottom.Owing to having lagging material to be separated by with top, be equivalent to increase thermal resistance and make bottom very little on the impact meeting of top thermal field when adjusting heat distribution.The automatically controlled part of both sides, bottom heating rod is arranged in independent housing, each loop have control part assign to control loop break-make and size adjustment.
Claims (6)
1. a muffle furnace field control device, it is characterized in that: comprise lagging material cavity (4) and heating rod, heating rod passes lagging material cavity (4) along lagging material cavity (4) length direction, and stretching out lagging material cavity (4) both ends of the surface through after lagging material cavity (4), lagging material cavity (4) is opening shape towards body side; It is cold-zone (3) that heating rod stretches out lagging material cavity (4) both ends of the surface, it is low hot zone (1) that heating rod is positioned at lagging material cavity (4) middle part, and low hot zone (1) both sides are high hot zone (2).
2. muffle furnace field as claimed in claim 1 control device, is characterized in that: described heating rod is silicon carbide heating rod.
3. muffle furnace field as claimed in claim 2 control device, it is characterized in that: the heated length L1 of described low hot zone (1) place silicon carbide heating rod is 500 ㎜ ~ 600mm, and the heated length L2 of high hot zone (2) place silicon carbide heating rod is 1.5 ~ 1.7L1.
4. muffle furnace field as claimed in claim 2 or claim 3 control device, is characterized in that: described heating rod carries out the adjustment of electric power aperture with by control silicon.
5. muffle furnace field as claimed in claim 1 control device, is characterized in that: described heating rod is isolated by lagging material cavity (4) and other region thermal fields of retort furnace.
6. the muffle furnace field control device as described in claim 1 or 5, is characterized in that: the distance between described lagging material cavity (4) and heating rod is less than 100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420850481.0U CN204356218U (en) | 2014-12-27 | 2014-12-27 | Muffle furnace field control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420850481.0U CN204356218U (en) | 2014-12-27 | 2014-12-27 | Muffle furnace field control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204356218U true CN204356218U (en) | 2015-05-27 |
Family
ID=53257699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420850481.0U Active CN204356218U (en) | 2014-12-27 | 2014-12-27 | Muffle furnace field control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204356218U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108793688A (en) * | 2018-07-24 | 2018-11-13 | 彩虹显示器件股份有限公司 | A kind of glass substrate forming method for controlling thickness |
| CN111646676A (en) * | 2020-07-01 | 2020-09-11 | 彩虹显示器件股份有限公司 | Substrate glass forming temperature field control device and method |
| CN114426391A (en) * | 2022-02-24 | 2022-05-03 | 彩虹显示器件股份有限公司 | Overflow groove heating device and muffle furnace |
-
2014
- 2014-12-27 CN CN201420850481.0U patent/CN204356218U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108793688A (en) * | 2018-07-24 | 2018-11-13 | 彩虹显示器件股份有限公司 | A kind of glass substrate forming method for controlling thickness |
| CN108793688B (en) * | 2018-07-24 | 2021-10-08 | 彩虹显示器件股份有限公司 | Glass substrate forming thickness control method |
| CN111646676A (en) * | 2020-07-01 | 2020-09-11 | 彩虹显示器件股份有限公司 | Substrate glass forming temperature field control device and method |
| CN111646676B (en) * | 2020-07-01 | 2023-09-22 | 彩虹显示器件股份有限公司 | Device and method for controlling substrate glass forming temperature field |
| CN114426391A (en) * | 2022-02-24 | 2022-05-03 | 彩虹显示器件股份有限公司 | Overflow groove heating device and muffle furnace |
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