CN211419978U

CN211419978U - Float TFT-LCD glass vertical annealing kiln

Info

Publication number: CN211419978U
Application number: CN201922408265.6U
Authority: CN
Inventors: 刘文瑞; 李艳; 王保平
Original assignee: Bengbu Zhongguangdian Technology Co Ltd
Current assignee: Bengbu Zhongguangdian Technology Co Ltd
Priority date: 2019-12-28
Filing date: 2019-12-28
Publication date: 2020-09-04
Anticipated expiration: 2029-12-28

Abstract

The utility model provides a perpendicular annealing kiln of float process TFT-LCD glass, it includes annealing kiln main part (1), is equipped with in annealing kiln main part (1) and is equipped with a set of first bearing roller (2), a set of second bearing roller (3) and a set of traction wheel (4) in proper order, has still laid heating element (5) on annealing kiln main part (1) is interior. The utility model discloses simple structure, convenient to use utilize glass's dead weight, transmission glass reduces the fish tail on TFT-LCD glass surface, reduces the face and grinds work load and does not grind even.

Description

Float TFT-LCD glass vertical annealing kiln

The technical field is as follows:

the utility model relates to the field of float glass production equipment, in particular to a float TFT-LCD glass vertical annealing kiln.

Background art:

the production process of the float glass substrate comprises the following steps: various raw materials are melted in a kiln, formed in a tin bath and then enter an annealing kiln. The temperature of a conventional float glass ribbon entering an annealing lehr is about 600 c, at which point the glass has completed forming and enters the lehr. The internal transmission structure of the annealing kiln is that the glass belt is conveyed to the cold end for cutting under the drawing of hundreds of groups of rollers. The length of the annealing kiln is about 60 meters generally, the occupied area is large, heaters are distributed at intervals in the annealing kiln, and the temperature gradient is controlled.

For TFT-LCD glass, alumina is usually adopted in the material prescription, the alumina can improve the melting and forming temperature of the glass, the temperature of the glass taken out of a tin bath is about 200 ℃ higher than that of common glass, the glass belt is in the process of conversion from a softening point to an annealing point, the glass belt is still softer, the traditional roller wheel transmission is adopted, and in the transmission process, the probability of scratches in an effective area in the middle of the surface of the glass is greatly increased due to more roller tables.

In addition, in the liquid crystal display panel factory, evaporation and etching of 3-5 μm lines are required to be carried out on the surface of glass, and the requirement on the surface quality of the glass is extremely high, so that the float TFT-LCD glass is required to be subjected to surface grinding in most cases, so that the surface quality of the product meets the requirement.

The utility model has the following contents:

the utility model provides a float TFT-LCD glass vertical annealing kiln, aiming at overcoming the defects in the prior art.

The application provides the following technical scheme:

a float TFT-LCD glass vertical annealing kiln comprises an annealing kiln main body, and is characterized in that: be equipped with a set of first bearing roller, a set of second bearing roller and at least a set of traction wheel in the annealing kiln main part in proper order, first bearing roller, second bearing roller and traction wheel all correspond the cooperation with the glass area, be equipped with in the annealing kiln main part outside and correspond complex transmission with first bearing roller, second bearing roller and traction wheel, still laid the heating unit on the inner wall of annealing kiln main part.

On the basis of the technical scheme, the following further technical scheme can be provided:

the annealing kiln main part include horizontal segment, slope section and the vertical section that communicates in proper order.

The heating unit is a sheet-shaped resistance heating wire.

The traction wheel is made of composite refractory material.

Utility model advantage:

the utility model discloses simple structure, convenient to use utilize glass's dead weight, transmission glass reduces the fish tail on TFT-LCD glass surface, reduces the face and grinds work load and does not grind even.

Description of the drawings:

fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic view of the distribution of the traction wheels in fig. 1.

The specific implementation mode is as follows:

as shown in figures 1 and 2, the float TFT-LCD glass vertical annealing furnace comprises an annealing furnace main body 1, wherein the annealing furnace main body 1 comprises a horizontal section 1a, a slope section 1b and a vertical section 1c which are sequentially communicated. One end of the horizontal section 1a is provided with a glass belt inlet, a group of first supporting rollers 2 which are horizontally distributed penetrate through the horizontal section 1a on one side of the inlet, and a group of second supporting rollers 3 which are distributed in an arc shape penetrate through the slope section 1 b. The first carrier roller 2 and the second carrier roller 3 are both composed of stainless steel or ceramic rollers distributed along the width direction of the glass ribbon 7.

Two groups of traction wheels 4 with different heights are arranged at one end of the vertical section 1c in a penetrating way, and a pair of traction wheels 4 in the same group are symmetrically distributed on the left and the right. The traction wheels 4 are all provided with rotating shafts 4a, and one ends of the rotating shafts 4a extend out of the annealing kiln main body 1. The axes of the rotating shafts 4a on the same group of traction wheels 4 are in the same horizontal plane.

The two adjacent traction wheels 4 in the same group are respectively distributed on one side of the upper surface and the lower surface of the invalid area on the two side edges of the glass ribbon 7 and are in contact with the invalid areas on the two side edges of the glass ribbon 7, namely, the wheel surfaces of the two adjacent traction wheels 4 can clamp the invalid areas on the two side edges of the glass ribbon 7. The traction wheel 4 is made of composite refractory material.

The outer side of the annealing kiln main body 1 is provided with a transmission device correspondingly matched with the first carrier roller 2, the second carrier roller 3 and the rotating shaft 4a, and the transmission device is a chain wheel and chain transmission device in the prior art and a motor matched with the chain wheel and chain transmission device. The chain wheel and the chain are driven by the motor, and then the driven gear is in transmission fit with the first carrier roller 2 and the second carrier roller 3 which are positioned outside the annealing kiln main body 1 and the driven gear at one end of the rotating shaft 4 a.

Heating units 5 are laid on the inner walls of the slope sections 1b and the vertical sections 1c on both sides of the surface of the glass ribbon 3, and the heating units 5 are also laid on the top of the horizontal section 1 a. The bottom of the horizontal section 1a is provided with slag outlets 8 which are not shown in the figure, the slag outlets 8 are arranged at intervals, the bottom of the horizontal section 1a between the slag outlets 8 is also provided with a heating unit 5, and the heating unit 5 is a sheet-shaped resistance heating wire. And a sealing plate 8a correspondingly matched with the slag discharge port 8 is also arranged on the outer wall of the horizontal section 1 a.

The outer wall of the annealing kiln main body 1 is further wrapped with an insulating layer which is not shown in the figure.

The working process is as follows:

the glass belt 7 enters the annealing kiln main body from a glass belt inlet at one end of the horizontal section 1a, then enters the slope section 1b under the conveying of the first carrier rollers 2 which are horizontally distributed, and then enters the vertical section 1c under the transition of the second carrier rollers 3 which are distributed in an arc shape, the thickness of the common TFT-LCD glass is below 0.5mm, 4PP detection is carried out, the bending resistance can reach 400MPA, and the whole transition distance is within 5 meters under the condition of good annealing effect. After entering the vertical section 1c, the glass ribbon 7 is conveyed by the traction wheel 4, and the glass ribbon 7 is naturally conveyed along the vertical direction.

Claims

1. A float TFT-LCD glass vertical annealing kiln comprises an annealing kiln main body (1), and is characterized in that: be equipped with in annealing kiln main part (1) in proper order and be equipped with a set of first bearing roller (2), a set of second bearing roller (3) and at least a set of traction wheel (4), first bearing roller (2), second bearing roller (3) and traction wheel (4) all correspond the cooperation with glass area (7), be equipped with in the annealing kiln main part (1) outside and correspond complex transmission with first bearing roller (2), second bearing roller (3) and traction wheel (4), still laid heating unit (5) on the inner wall of annealing kiln main part (1).

2. A float TFT-LCD glass vertical annealing lehr as claimed in claim 1, wherein: the annealing kiln main body (1) comprises a horizontal section (1 a), a slope section (1 b) and a vertical section (1 c) which are sequentially communicated.

3. A float TFT-LCD glass vertical annealing lehr as claimed in claim 1, wherein: the heating unit (5) is a resistance heating wire.

4. A float TFT-LCD glass vertical annealing lehr as claimed in claim 1, wherein: the traction wheel (4) is made of composite refractory material.