Method for preventing black deposits on the lower surface of rolled glass

Abstract

A kind of method for preventing black attachment on the lower surface of calender glass, relates to a glass processing method, by setting air port on the side of calender lower roller A and calender lower roller B respectively, air blowing cleaning is carried out, cold air is sent into the roll cavity of calender lower roller A and calender lower roller B by using the air inlet pipe arranged on the side of calender lower roller A and calender lower roller B, the physical continuous cooling of calender lower roller A and calender lower roller B is obtained;The present application uses the air port of wind box A and wind box B to blow off the impurities separated from the chromium plating layer on the lower surface of calender lower roller A and calender lower roller B to prevent the invasion of black attachment on the lower surface of glass, and then the cold air in calender lower roller A and calender lower roller B is continuously cooled physically, which can effectively prevent the occurrence of chromium plating layer separation phenomenon caused by overheating.

Description

Technical Field

[0001] This invention relates to a glass processing method, and more specifically, to a method for preventing black deposits on the lower surface of rolled glass. Background Technology

[0002] The method used in the processing of photovoltaic glass is: [The text abruptly ends here, likely due to an incomplete sentence or missing information.] Figure 2 The glass processing method disclosed herein involves melting, clarifying, and homogenizing glass raw materials in a furnace to form molten glass (1). The flowing molten glass (1) flows through a flow channel (2) to a throttling roller (3). After the throttling roller (3) initially flattens the molten glass (1), it is lifted by a lip brick (17) and enters between the upper rolling roller A (5) and the lower rolling roller A (14) to be thinned, forming a smooth initial extruded glass strip (6). Then, the initial extruded glass strip (6) is lifted by a support roller (10) and enters between the upper rolling roller B (7) and the lower rolling roller B (11) for further thinning. In this process, the upper rolling roller B (7) is set to have a rough surface, and the roughness of the surface of the upper rolling roller B (7) creates a textured surface on the upper surface of the glass. The surface of the lower rolling roller B (11) is set to have a patterned surface, and the pattern on the surface of the lower rolling roller B (11) is used to make the finished glass smooth. After the light transmittance is improved, a glass strip (8) is formed. The glass strip (8) is then fed into the subsequent annealing and cutting processes using a support roller (10). When monitoring the rolled glass products, our company found that there were black deposits on the lower surface of the finished glass. In severe cases, this affects the quality of the product. Samples of rolled glass containing black deposits were taken and observed under a microscope. The black deposits were located on the embossed surface of the lower surface of the glass and appeared as dots or flakes. Through in-depth investigation of the problem, it was found that the black deposits on the lower surface of the glass originated from the forming end, specifically from the detached material of the lower rolling roller, which was pressed into the lower surface of the glass during the glass forming process. The main material of the lower rolling roller of the rolling mill is 20CrNiMo, and chromium is plated on the surface of the alloy structural steel to increase oxidation resistance and wear resistance. Although the chromium plating layer has high chemical stability, the corrosion of the chromium plating layer on the surface of the lower rolling roller under long-term high temperature environment is the root cause of the black deposit problem on the lower surface of the glass. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing methods by disclosing a method for preventing black deposits on the lower surface of rolled glass. This method utilizes the air outlets of air boxes A and B to blow air onto the lower surfaces of the rolling rollers A and B, removing impurities that have detached from the chromium plating layer and preventing the black deposits from intruding onto the lower surface of the glass. Furthermore, by continuously cooling the air inside the rolling rollers A and B, the chromium plating layer can be effectively prevented from detaching due to overheating.

[0004] In order to achieve the objective of this invention, this application discloses the following technical solution:

[0005] A method for preventing black attachments on the lower surface of rolled glass, after the initial glass liquid forming step, the initial glass liquid is lifted by the lip brick into the space between the upper roll A and the lower roll A for thinning to form an initial extruded glass ribbon with smooth upper and lower surfaces. At this time, the air blown out of the air port on the side of the lower part of the lower roll A is used to blow and clean the lower roll A, while the cool air is sent into the roll cavity of the lower roll A through the air inlet pipe on one side of the lower roll A, and the hot air is taken out of the roll cavity of the lower roll A through the air outlet pipe on the other side of the lower roll A to obtain physical continuous cooling of the lower roll A. Then the initial extruded glass ribbon is lifted by the supporting roll and enters the space between the upper roll B and the lower roll B for thinning again. At this time, the air blown out of the air port on the side of the lower part of the lower roll A is used to blow and clean the lower surface of the lower roll B, while the cool air is sent into the roll cavity of the lower roll B through the air inlet pipe on one side of the lower roll B, and the hot air is taken out of the roll cavity of the lower roll B through the air outlet pipe on the other side of the lower roll B to obtain physical continuous cooling of the lower roll B, and then enter the subsequent step.

[0006] The method for preventing black attachments on the lower surface of rolled glass, the glass liquid forming step, the glass raw material is melted, clarified and homogenized in the melting furnace to form glass liquid. The flowing glass liquid flows on the flow channel to the throttle roll, and then reaches the upper part of the lip brick after being preliminarily flattened by the throttle roll.

[0007] The method for preventing black attachments on the lower surface of rolled glass, the subsequent step, the physical continuous cooling process of the lower roll B, the upper roll B is provided with a surface having roughness, and the roughness of the surface of the upper roll B obtains a suede surface on the upper surface of the glass; the surface of the lower roll B is provided with a patterned surface, and the patterned surface of the lower roll B is used to improve the light transmittance of the finished glass to form a glass ribbon, which is then fed into the subsequent annealing and cutting process by the supporting roll.

[0008] The method for preventing black attachments on the lower surface of rolled glass, the air box B and the air box A are of the same structure, the air box B is provided with a long air port corresponding to the lower surface of the lower roll A on the side close to the upper end, and the lower side of the air box B is provided with an air inlet interface, and the air inlet interface is connected with an air blower.

[0009] The method for preventing black attachments on the lower surface of rolled glass, a plurality of air holes are provided on the side close to the upper end of the air box B, and a double-layer air port plate is fixedly connected to the plurality of air holes of the air box B, the long air port of the air box B is inclined downward, and a plurality of reinforcing plates are arranged in the long air port at intervals.

[0010] The method for preventing black adhesion on the lower surface of the calendered glass, the lower calender roller A and the lower calender roller B are of the same structure, both ends of the lower calender roller A are provided with roller end shaft pipes, power gears A and B connected with the power mechanism are arranged at the outer edges of the middle parts of the two roller end shaft pipes, bearings are arranged at the outer edges of the outer ends of the two roller end shaft pipes, the two bearings are fixed on the upper ends of the supports through the bearing seats, the two support pipes are inserted into the two roller end shaft pipes, a plurality of sealing rings are arranged at the outer edges of the two support pipes, the sealing rings are in sliding fit with the roller end shaft pipes, the outer ends of the two support pipes are connected with the air inlet pipe and the air outlet pipe, the air inlet pipe is connected with the air blower, and the air blower continuously sends cold air into the roller cavities of the lower calender roller A and the lower calender roller B through the air inlet pipe to achieve physical cooling of the lower calender roller A and the lower calender roller B.

[0011] The method for preventing black adhesion on the lower surface of the calendered glass, the inner ends of the two roller end shaft pipes are connected with the two ends of the lower calender roller A in a plug-in manner, and the cavity of the lower calender roller A between the two roller end shaft pipes forms a roller cavity.

[0012] The method for preventing black adhesion on the lower surface of the calendered glass, a hemispherical ring opening is arranged at the inner end opening of the support pipe, the outer half part of the universal ball arranged at the outer edge surface of the outer end of the air outlet pipe is inserted into the hemispherical ring opening of the support pipe, the inner end of the air outlet pipe passes through the opening of the semicircular head of the connecting pipe and is located in the roller cavity of the lower calender roller A, a plurality of air holes are arranged on the pipe body between the universal ball and the inner end of the air outlet pipe, the hemispherical ring arranged in the opening of the semicircular head of the connecting pipe wraps the inner half part of the universal ball, and the connecting pipe is sleeved on the inner end of the support pipe and is fixed through welding; the outer end of the air outlet pipe is limited by the pipe hole of the support pipe to prevent the inner end of the air outlet pipe from contacting the wall of the roller cavity of the lower calender roller A.

[0013] The method for preventing black adhesion on the lower surface of the calendered glass, the inner end of the air outlet pipe is of a closed structure.

[0014] Through the above disclosure, the beneficial effects of the present application are:

[0015] The method for preventing black attachments on the lower surface of the calendered glass, by setting the air bellow A on one side of the lower calendering roller A and the air bellow B on one side of the lower calendering roller B, introducing the air into the air bellow A and the air bellow B by the fan, and then blowing the lower surface of the lower calendering roller A and the lower calendering roller B through the air outlet of the air bellow A and the air bellow B respectively to blow away the chromium plating layer that falls off, avoids the formation of the black attachments on the lower surface of the glass caused by the chromium plating layer falling off; meanwhile, the cold air is introduced into the lower calendering roller A and the lower calendering roller B through the air inlet pipe on one side of the lower calendering roller A and the lower calendering roller B respectively, and the physical continuous cooling of the lower calendering roller A and the lower calendering roller B is realized by the cold air, so that the chromium plating layer falling off caused by the high temperature is further prevented; in order to make the cold air in the lower calendering roller A and the lower calendering roller B be uniformly distributed, a plurality of air holes are arranged on the air outlet pipe and the air inlet pipe respectively, so that the cold air is uniformly distributed in the roller cavity; the black attachments caused by the corrosion of the chromium plating layer on the lower surface of the glass are effectively overcome. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the control roadmap of the present application;

[0017] Figure 2 is the installation position structure diagram of the improved part for preventing black attachments on the calendered glass equipment;

[0018] Figure 3 is the structure diagram of the lower calendering roller of the present application;

[0019] Figure 4 is the structure diagram of the air outlet pipe, the support pipe and the connecting pipe of the present application;

[0020] Figure 5 is the assembly structure diagram of the air outlet pipe, the support pipe and the connecting pipe of the present application;

[0021] Figure 6 is the air outlet structure diagram of the air bellow of the present application;

[0022] Figure 7 is the three-dimensional structure diagram of the air bellow of the present application;

[0023] In the figure: 1, glass liquid; 2, flow channel; 3, throttle roller; 4, initial pressure glass liquid; 5, calender upper roller A; 6, initial extrusion glass band; 7, calender upper roller B; 8, glass band; 9, glass lower surface; 10, supporting roller; 11, calender lower roller B; 12, blown gas; 13, air bellow A; 14, calender lower roller A; 15, air outlet; 16, air bellow B; 17, lip brick; 18, air inlet pipe; 19, supporting pipe; 20, connecting pipe; 21, air outlet pipe; 22, roller cavity; 23, roller end shaft pipe; 24, power gear A; 25, bearing; 26, air outlet pipe; 27, auxiliary support; 28, support; 29, sealing ring; 30, air inlet pipe; 31, power gear B; 32, pipe hole; 33, semicircular head; 34, universal ball; 35, semicircular ring; 36, inner wall; 37, semicircular ring; 38, mouth; 39, reinforcing plate; 40, air duct; 41, air hole; 42, air inlet interface. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present application will be described in detail with reference to the drawings, so that the inventive purpose, features and advantages of the present application can be more clearly understood. It should be understood that the embodiments shown in the drawings are not a limitation on the scope of the present application, but are only used to explain the technical solutions of the present application which are not limited to one embodiment.

[0025] The preferred embodiments of the present application will be described in detail with reference to the drawings, so that the inventive purpose, features and advantages of the present application can be more clearly understood. It should be understood that the embodiments shown in the drawings are not a limitation on the scope of the present application, but are only used to explain the technical solutions of the present application which are not limited to one embodiment. Figures 1 to 7 The support 28 of the air bellow B 16 and the calender lower roller A 14 is fixed to ensure the stability of the air bellow B 16, and the support 28 of the air bellow A 13 and the fixed calender lower roller B 11 is also fixed, and the fixing method can adopt steel plate welding or other ways; the air bellow B 16 and the air bellow A 13 are the same structure, and the air bellow B 16 is provided with a long air outlet 15 corresponding to the lower surface of the calender lower roller A 14 on the side close to the upper end, and the length of the air outlet 15 matches the length of the calender lower roller A 14, and the air bellow B 16 is fixed to the support 28 of the calender lower roller A 14. Figure 6 The specific structure of the air bellow B 16 is that a plurality of air holes 41 are punched on the side close to the upper end of the air bellow B 16, and then the upper and lower double-layer air outlet 15 plates are fixedly connected on the upper and lower air bellow B 16 respectively, and the two ends are respectively provided with end plates, and the long air outlet 15 of the air bellow B 16 is inclined downward, and in order to ensure the strength, a plurality of vertical reinforcing plates 39 are arranged in the long air outlet 15, and the air passes through the plurality of air holes 41 and then enters between the two reinforcing plates 39 and is discharged from the long air outlet 15 to form an air duct 40; the air bellow B 16 is provided with an air inlet interface 42 on one side of the lower part, and the air inlet interface 42 is connected with an air blower, and the normal clean room temperature air is introduced by the air blower;

[0026] The preferred embodiments of the present application will be described in detail with reference to the drawings, so that the inventive purpose, features and advantages of the present application can be more clearly understood. It should be understood that the embodiments shown in the drawings are not a limitation on the scope of the present application, but are only used to explain the technical solutions of the present application which are not limited to one embodiment. Figures 3 to 5, the structure of the calendering lower roller A14 and the calendering lower roller B11 is the same, both ends of the calendering lower roller A14 are respectively provided with roller end shaft pipes 23, the inner ends of the two roller end shaft pipes 23 are respectively inserted and connected in the two end ports of the calendering lower roller A14, the cavity of the calendering lower roller A14 between the two roller end shaft pipes 23 forms a roller cavity 22, that is, the inner ends of the two roller end shaft pipes 23 are respectively inserted and fixed by welding after a small amount of insertion, the power gear A24 and the power gear B31 connected with the power mechanism are respectively arranged on the middle outer edges of the two roller end shaft pipes 23, the bearings 25 are respectively arranged on the outer edges of the outer ends of the two roller end shaft pipes 23, the two bearings 25 are respectively fixed on the upper ends of the supports 28 through the bearing seats, the two support pipes 19 are respectively inserted in the two roller end shaft pipes 23, a plurality of sealing rings 29 are respectively arranged on the outer edges of the two support pipes 19 at intervals, the plurality of sealing rings 29 are in sliding fit with the roller end shaft pipes 23, and the plurality of sealing rings 29 are used to stabilize the two support pipes 19 and prevent the two support pipes 19 from rotating with the two roller end shaft pipes 23; the hemispherical ring port 35 is arranged on the inner end port of the support pipe 19, the outer half of the universal ball 34 arranged on the outer edge surface close to the outer end of the air outlet pipe 21 is inserted in the hemispherical ring port 35 of the support pipe 19, the inner end of the air outlet pipe 21 is in the roller cavity 22 of the calendering lower roller A14 after passing through the port 38 of the inner end semicircular head 33 of the connecting pipe 20, a plurality of air holes are distributed on the pipe body between the universal ball 34 and the inner end of the air outlet pipe 21, the hemispherical ring 37 arranged in the port 38 of the inner end semicircular head 33 of the connecting pipe 20 is wrapped in the inner half of the universal ball 34, and the inner wall 36 of the connecting pipe 20 is sleeved on the inner end outer edge of the support pipe 19 and fixed by welding; the inner end of the air outlet pipe 21 is not in contact with the wall of the roller cavity 22 of the calendering lower roller A14 after the outer end of the air outlet pipe 21 is limited by the pipe hole 32 of the support pipe 19, and the air inlet pipe 30 installed on the inner end of the other support pipe 19 has the same structure as the air outlet pipe 21 but is installed in the opposite direction; the outer ends of the two support pipes 19 are respectively connected with the air inlet pipe 18 and the air outlet pipe 26, the air inlet pipe 18 is connected with the fan, normal clean room temperature air is introduced through the fan, the fan continuously sends cold air into the roller cavities 22 of the calendering lower roller A14 and the calendering lower roller B11 through the air inlet pipe 18 to achieve physical cooling of the calendering lower roller A14 and the calendering lower roller B11; the inner ends of the air inlet pipe 30 and the air outlet pipe 21 are of a closed structure.

[0027] The glass raw material forms a glass liquid 1 after melting, refining and homogenizing in a melting furnace. The flowing glass liquid 1 flows on a flow channel 2 to a throttle roller 3. The throttle roller 3 preliminarily flattens the glass liquid 1. The preliminarily flattened glass liquid 4 is lifted by a lip brick 17 and enters between a calender upper roller A5 and a calender lower roller A14 to be thinned to form a preliminarily extruded glass ribbon 6 with smooth upper and lower surfaces. At this time, the blowing gas 12 from the tuyere 15 on the side of the air box B16 of the lower part of the calender lower roller A14 blows and cleans the calender lower roller A14. At the same time, the cool air is sent into the roller cavity 22 of the calender lower roller A14 through the air inlet pipe 18 on the side of the calender lower roller A14. The hot air is taken out of the roller cavity 22 of the calender lower roller A14 through the air outlet pipe 26 on the other side of the calender lower roller A14 to obtain physical continuous cooling of the calender lower roller A14. Then, the preliminarily extruded glass ribbon 6 is lifted by a supporting roller 10 and enters between a calender upper roller B7 and a calender lower roller B11 to be thinned again. At this time, the blowing gas 12 from the tuyere 15 on the side of the air box A13 of the lower part of the calender lower roller B11 blows and cleans the lower surface of the calender lower roller B11. At the same time, the cool air is sent into the roller cavity 22 of the calender lower roller B11 through the air inlet pipe 18 on the side of the calender lower roller B11. The hot air is taken out of the roller cavity 22 of the calender lower roller B11 through the air outlet pipe 26 on the other side of the calender lower roller B11 to obtain physical continuous cooling of the calender lower roller B11. The calender upper roller B7 is provided with a surface having roughness in this process. The roughness of the surface of the calender upper roller B7 obtains a suede surface on the upper surface of the glass. The surface of the calender lower roller B11 is provided with a pattern. The light transmittance of the finished glass is improved by the pattern on the surface of the calender lower roller B11 to form a glass ribbon 8. The lower surface 9 of the glass is relatively clean by double cooling of the calender lower roller A14 and the calender lower roller B11. The glass ribbon 8 enters subsequent annealing and cutting processes by the supporting roller 10.

[0028] The preferred embodiments of the present application have been described in detail above, but it should be understood that various modifications and changes can be made by those skilled in the art after reading the above description of the present application. These equivalent forms also fall within the scope of the appended claims of the present application.

[0029] The parts not described in detail of the present application are prior art.

Claims

1. A method of preventing black deposits on the lower surface of a rolled glass, characterized in that: After the forming step of the initial pressure glass liquid (4), the initial pressure glass liquid (4) is lifted by the lip brick (17) to enter the calendering upper roller A (5) and the calendering lower roller A (14) to form the initial extrusion glass belt (6) with smooth upper and lower surfaces, at this time, the blowing gas (12) from the air port (15) on the side of the air box B (16) of the lower part of the calendering lower roller A (14) blows and cleans the calendering lower roller A (14), at the same time, the cooling air is sent into the roller cavity (22) of the calendering lower roller A (14) through the air inlet pipe (18) on the side of the calendering lower roller A (14), the hot air is taken out of the roller cavity (22) of the calendering lower roller A (14) through the air outlet pipe (26) on the other side of the calendering lower roller A (14) to obtain the physical continuous cooling of the calendering lower roller A (14), the roller end shaft pipes (23) are respectively arranged at the two ends of the calendering lower roller A (14), the power gear A (24) and the power gear B (31) connected with the power mechanism are respectively arranged at the outer edges of the middle parts of the two roller end shaft pipes (23), the bearings (25) are respectively arranged at the outer ends of the two roller end shaft pipes (23), the two bearings (25) are respectively fixed on the upper ends of the supports (28) through the bearing seats, the two support pipes (19) are respectively inserted into the two roller end shaft pipes (23), a plurality of sealing rings (29) are respectively arranged at the outer edges of the two support pipes (19) at intervals, the plurality of sealing rings (29) are in sliding fit with the roller end shaft pipes (23), the two support pipes (19) are respectively fixed on the upper ends of the auxiliary supports (27) near the outer ends, and the outer ends of the two support pipes (19) are respectively connected with the air inlet pipe (18) and the air outlet pipe (26); then the initial extrusion glass belt (6) is lifted by the roller (10) to enter the calendering upper roller B (7) and the calendering lower roller B (11) to be pressed thin again, at this time, the blowing gas (12) from the air port (15) on the side of the air box A (13) of the lower part of the calendering lower roller B (11) blows and cleans the lower surface of the calendering lower roller B (11), at the same time, the cooling air is sent into the roller cavity (22) of the calendering lower roller B (11) through the air inlet pipe (18) on the side of the calendering lower roller B (11), the hot air is taken out of the roller cavity (22) of the calendering lower roller B (11) through the air outlet pipe (26) on the other side of the calendering lower roller B (11) to obtain the physical continuous cooling of the calendering lower roller B (11), and then enters the subsequent step; A hemispherical ring (35) is arranged at the inner end of the support pipe (19), the outer half of the universal ball (34) arranged at the outer end of the air outlet pipe (21) is inserted into the hemispherical ring (35) of the support pipe (19), the inner end of the air outlet pipe (21) passes through the port (38) of the semicircular head (33) of the connecting pipe (20) and is located in the roller cavity (22) of the lower calendering roller A (14), a plurality of air holes are arranged on the pipe body between the universal ball (34) and the inner end of the air outlet pipe (21), the semispherical ring (37) arranged in the port (38) of the semicircular head (33) of the connecting pipe (20) is wrapped in the inner half of the universal ball (34), and the connecting pipe (20) is sleeved on the inner end of the support pipe (19) and fixed by welding; the outer end of the air outlet pipe (21) is limited by the pipe hole (32) of the support pipe (19), and the inner end of the air outlet pipe (21) is not in contact with the wall of the roller cavity (22) of the lower calendering roller A (14).

2. The method of claim 1, wherein the method is characterized by: The glass liquid forming step is that the glass raw material is formed into glass liquid (1) through melting, refining and homogenizing in a melting furnace, the flowing glass liquid (1) flows on a flow channel (2) to a throttle roller (3), and the throttle roller (3) preliminarily flattens the glass liquid (1) to reach the upper part of a lip brick (17).

3. The method of claim 1, wherein the method further comprises: The subsequent step is that the calendering upper roller B (7) in the physical continuous cooling process of the calendering lower roller B (11) is provided with a surface with roughness, and the roughness of the surface of the calendering upper roller B (7) obtains a velvet surface of the upper surface of the glass; the surface of the calendering lower roller B (11) is provided with a patterned surface, the light transmittance of the finished glass is improved by using the pattern of the surface of the calendering lower roller B (11), and a glass ribbon (8) is formed, and the glass ribbon (8) enters subsequent annealing and cutting processes by using a supporting roller (10).

4. The method of claim 1, wherein the method further comprises: The wind box B (16) and the wind box A (13) are of the same structure, the long strip air port (15) of the wind box B (16) is arranged on one side close to the upper end and corresponds to the lower surface of the calendering lower roller A (14), the lower side of the wind box B (16) is provided with an air inlet interface (42), and the air inlet interface (42) is connected with a fan.

5. The method of claim 4, wherein the step of applying a black undercoating to the lower surface of the rolled glass is performed by The wind box B (16) is provided with a plurality of air holes (41) on the side close to the upper end, the double-layer air port (15) is fixedly connected to the plurality of air holes (41) of the wind box B (16) on the upper and lower sides, respectively, the long strip air port (15) of the wind box B (16) is inclined downward, and a plurality of reinforcing plates (39) are arranged in the long strip air port (15) at intervals.

6. The method of claim 1, wherein the method further comprises: The calendering lower roller A (14) and the calendering lower roller B (11) are of the same structure, the fan is connected to the air inlet pipe (18), and the fan continuously sends cold air into the roller cavity (22) of the calendering lower roller A (14) and the calendering lower roller B (11) through the air inlet pipe (18) to achieve physical cooling of the calendering lower roller A (14) and the calendering lower roller B (11).

7. The method of claim 1, wherein the method further comprises: The inner ends of the two roller end shaft pipes (23) are respectively inserted and connected to the two ends of the calendering lower roller A (14), and the cavity of the calendering lower roller A (14) between the two roller end shaft pipes (23) forms the roller cavity (22).

8. The method of claim 1, wherein the method further comprises: The inner end of the air outlet pipe (21) is a closed structure.

Images