Calendering roller with special-shaped water core and calender comprising calendering roller

Abstract

The utility model discloses a calendaring roller with a special-shaped water core and a calender comprising the calendaring roller, the calendaring roller extends along the axial direction, a cooling water cavity is arranged in the roller along the axial direction, and the cooling water cavity is coaxial with the calendaring roller; and the cross section diameter of the middle part of the cooling water cavity is smaller than that of the two ends of the cooling water cavity. The diameter of the cross section of the cooling water cavity is gradually increased from the middle to the two ends, the wall thickness of the calender roll is thicker in the middle than the two sides, the cooling transfer effect of the middle point is poorer than that of the two sides, and the cooling transfer effect of the two sides is better, so that the temperature of molten glass on the two sides of the outer wall of the calender roll can be reduced; the temperature of molten glass in contact with the middle of the outer wall of the calendering roller is slightly influenced by the cooling effect due to the fact that the thickness of the middle wall of the calendering roller is larger, so that the fluidity of the molten glass at the middle point corresponding to the outer wall is better, the fluidity of the two sides is relatively poor, the thickness of the middle can be correspondingly reduced, and the two sides are thickened; therefore, the problem that the calendaring-molded glass plate is thick in the middle and thin on the two sides under partial working conditions is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of the structure of glass pressing rollers in chemical metallurgy, and specifically relates to a calendering roller with a special-shaped water core and a calendering machine containing the calendering roller. Background Art

[0002] In the process of producing ultra-thin microcrystalline glass using the glass calendering method, the glass liquid passes between the upper and lower rolling calendering rollers of the calendering machine and is calendered into a microcrystalline ultra-thin glass plate with a thickness of ≤1mm.

[0003] The temperature of the glass liquid is ≥1000℃. The temperature of the glass liquid will change from the feeding port of the melting pool to before it contacts the calendering roller and when it contacts the calendering roller, which will have an adverse effect on the condition of the calendered glass sheet, causing quality problems such as thickness difference, warping, cold cracking, etc. When the glass liquid contacts the calendering roller, the material, thermal conductivity, hardness, circulating water temperature, etc. of the calendering roller will affect the temperature of the glass liquid.

[0004] In the prior art, in order to control the condition of the calendered glass plate surface, methods such as adjusting the water inlet and outlet of the calender rollers, blowing pipes, loose roller gaps, electric heating, and torches are often used to control the temperature of the glass liquid to meet the requirements. However, since the design precision of most domestic molding equipment is not high, the aforementioned adjustment method takes a long time to implement, and the technical requirements for the molding operator are high. This easily leads to the above adjustment method not being able to eliminate the adverse effects of the glass plate condition during implementation, and the effect cannot be quickly manifested and sufficiently effective. It is necessary to design a solution that minimizes reliance on manual operation.

[0005] The applicant has conducted an in-depth analysis of the actual state of the molten glass. The higher the temperature of the molten glass, the lower the viscosity, and the better the fluidity of the corresponding molten glass. Usually, when the molten glass is formed between two calendering rollers, the temperature of the molten glass in the middle is higher than the temperature of the molten glass on both sides, resulting in the formed glass sheet being thin in the middle and thick on both sides. In response to this common situation, the applicant has designed, applied for and used a calendering roller with a cooling water core as described in Chinese patent CN220555668U. The cooling water core makes the temperature of the middle area of ​​the calendering roller lower than that of the two ends, thereby making the thickness of the calendered glass sheet more uniform and reducing the dependence on manual operation.

[0006] However, in the actual production process, it was found that in some working conditions, the calendered glass plate is thick in the middle and thin on both sides. For example, due to the process quality requirements of the previous process, some feeding devices that feed the calendering machine have uneven feeding, with more glass liquid in the middle and less glass liquid at both ends. Even if ordinary calendering rollers are used, although the fluidity of the glass liquid in the middle is better, the calendered plate is still thick in the middle and thin on both sides due to the large amount of glass liquid in the middle. In addition, as the calendering roller is used for a longer time, the state of the calendering roller will also change. For example, due to thermal expansion and contraction, the calender roller will experience thermal expansion accumulation. The expansion signs in the middle of the calender roller will be slightly smaller than those at the two ends. At this time, the roller diameter in the middle of the calender roller is slightly smaller than the roller diameter at both ends. The glass sheet that was originally discharged normally will appear thick in the middle and thin on both sides. For another example, the surface oxide layer of the calender roller may fall off after use. Since the middle part of the calender roller contacts the glass liquid first, the surface oxide layer in the middle of the calender roller will fall off first or fall off more severely, and the middle roller diameter will become smaller. The glass sheet that was originally discharged normally will also appear thick in the middle and thin on both sides. Summary of the invention

[0007] In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a calendering roller with a special-shaped water core and a calendering machine containing the calendering roller, so as to solve the problem that the glass plate formed by calendering under some working conditions is thick in the middle and thin on both sides, thereby achieving the effect of reducing the thickness difference and improving the yield rate.

[0008] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0009] A calendering roller with a special-shaped water core comprises a calendering roller extending along the axial direction; a cooling water cavity is opened in the calendering roller along the axial direction thereof, and the cooling water cavity is coaxial with the calendering roller;

[0010] The cross-sectional diameter of the middle portion of the cooling water chamber is smaller than the cross-sectional diameters of the two ends of the cooling water chamber.

[0011] To further improve the above technical solution, the cooling water chamber extends axially to both ends of the calendering roller.

[0012] Furthermore, the cross-sectional diameter of the cooling water cavity gradually increases from the middle to both ends.

[0013] Furthermore, the cross-sectional diameter of the cooling water chamber corresponding to the axial centerline position of the calendering roller is the smallest.

[0014] Furthermore, in the longitudinal section of the cooling water chamber, the middle portion of the cooling water chamber gradually increases in an arc shape toward both ends.

[0015] Furthermore, two ends of the cooling water chamber are symmetrical with respect to the axial center line of the calendering roller.

[0016] Furthermore, the shape of the calendering roller is cylindrical; the calendering roller includes a cylindrical calendering roller outer cylinder and a water core base installed in the calendering roller outer cylinder, the diameter of the water core base is adapted to the inner diameter of the calendering roller outer cylinder, the water core base is slidably installed in the calendering roller outer cylinder, the outer circumferential surface of the water core base is in contact with the inner wall of the calendering roller outer cylinder, and the cooling water chamber is opened in the water core base.

[0017] Furthermore, the two ends of the pressure roller outer cylinder are detachably connected with axially extending extension sections, the two ends of the water core matrix are respectively abutted against the extension sections at the opposite ends to limit the axial position, and a sealing ring is sandwiched between the extension section and the end surface of the water core matrix and / or the pressure roller outer cylinder.

[0018] Furthermore, it also includes a second water core that is matched and used to replace the water core matrix;

[0019] A coaxial second cooling water chamber is provided in the second water core along the axial direction, and the cross-sectional diameter of the second cooling water chamber gradually decreases from the middle to both ends;

[0020] After the extension section is removed, the water core matrix can be replaced with a second water core.

[0021] Optionally, it further comprises a third water core which is matched and used to replace the water core matrix;

[0022] A coaxial third cooling water cavity is axially penetrated in the third water core, and the third cooling water cavity is of an equal-diameter structure;

[0023] After the extension section is removed, the water core matrix can be replaced with a third water core.

[0024] The utility model also relates to a calender, which comprises at least one calender roller with a special-shaped water core; the calender roller is rotatably connected to the calender with its own axis as the rotation center.

[0025] Compared with the prior art, the utility model has the following beneficial effects:

[0026] 1. The utility model has a calendering roller with a special-shaped water core, and the cross-sectional diameter of the cooling water cavity gradually increases from the middle to both ends, so that the wall thickness of the calendering roller is greater in the middle than on both sides, the cooling transfer effect at the midpoint is worse than on both sides, and the cooling transfer effect on both sides is better, so that the temperature of the molten glass on both sides of the outer wall of the calendering roller can be reduced; the temperature of the molten glass in contact with the middle of the outer wall of the calendering roller is less affected by the cooling effect because the wall thickness in the middle of the calendering roller is thicker, so that the fluidity of the molten glass at the midpoint corresponding to the outer wall is better, and the fluidity on both sides is relatively poor, so the thickness in the middle can be thinned accordingly, while the thickness on both sides can be thickened, thereby improving the problem that the calendered glass plate is thick in the middle and thin on both sides under some working conditions.

[0027] 2. The calendering roller of the utility model adopts a detachable structure and is equipped with a water core matrix with cooling water chambers of different shapes. Combined with changes in actual working conditions and changes in product quality, according to the temperature difference adjustment principle, the water core matrix can be adaptively replaced to improve the quality of the calendered glass plate, thereby forming a calendering roller that is more in line with actual working conditions and ensuring the yield of the output material. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a calendering roller with a special-shaped water core according to Example 1;

[0029] Figure 2 It is a structural schematic diagram of a calendering roller with a special-shaped water core according to Example 2;

[0030] Figure 3 It is a schematic diagram of the connecting extension section of the calendering roller with a special-shaped water core in Example 2;

[0031] Figure 4 Can be used to replace Figure 3 A schematic diagram of the structure of the second water core of the middle water core matrix;

[0032] Figure 5 Can be used to replace Figure 3 A schematic diagram of the structure of the third water core of the middle water core matrix;

[0033] Figure 6 This is a comparison chart of the thickness difference between the glass sheets produced by the common calender roller water core and the special-shaped water core calender roller created by the present invention;

[0034] Figure 7 This is a graph comparing the thickness of glass sheets produced by a common calender roller water core and a calender roller with a special-shaped water core created by the present invention;

[0035] Figure 8 This is a comparison diagram of the warpage difference between glass sheets produced by a common calender roller water core and a calender roller with a special-shaped water core created by the present invention;

[0036] Among them, there are a calendering roller 1, a calendering roller outer cylinder 11, a water core base 12, a cooling water chamber 121, a second water core 13, a second cooling water chamber 131, a third water core 14, a third cooling water chamber 141, and an extension section 2. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model.

[0038] Embodiment 1

[0039] See also Figure 1The calendering roller with a special-shaped water core comprises a calendering roller 1 extending in the axial direction; a cooling water chamber 121 is provided in the calendering roller 1 along the axial direction thereof, and the cooling water chamber 121 is coaxial with the calendering roller 1; the cross-sectional diameter of the middle of the cooling water chamber 121 is smaller than the cross-sectional diameter of the two ends of the cooling water chamber 121. In the axial direction, the middle of the cooling water chamber 121 corresponds to the middle of the calendering roller 1; the wall thickness of the middle of the calendering roller 1 is greater than the wall thickness of the two ends of the calendering roller 1, and the middle and two ends of the calendering roller 1 mentioned here refer to the roller segments corresponding to the middle and two ends of the cooling water chamber 121, which are also the roller segments for calendering glass liquid.

[0040] In the special-shaped water-core calendering roller of Example 1, the cooling transfer effect at the midpoint is worse than that at the two sides, and the cooling transfer effect at the two sides is better, so that the temperature of the molten glass on both sides of the outer wall of the calendering roller 1 can be reduced; the temperature of the molten glass in contact with the middle of the outer wall of the calendering roller 1 is less affected by the cooling effect because the wall thickness in the middle of the calendering roller 1 is thicker, so the fluidity of the molten glass at the midpoint corresponding to the outer wall can be better, and the fluidity on both sides can be relatively poor, correspondingly, the thickness in the middle can be thinned, while the thickness on both sides can be thickened, thereby improving the problem that the calendered glass plate under some working conditions is thick in the middle and thin on both sides.

[0041] During implementation, the cross-sectional diameter of the cooling water chamber 121 can be gradually increased from the middle to the two ends in an arc-shaped or linear gradual change; or it can be gradually increased from the middle to the two ends in a step-shaped manner, and the specific details are not limited. The gradual increase can make the temperature of the outer surface of the calendering roller 1 gradually decrease from the middle to the two ends, which is conducive to the gradual control of the glass temperature, ensuring the thickness difference of the product and improving the yield rate.

[0042] The axial length of the cooling water chamber 121 may be less than the total length of the calendering roller 1. In this embodiment, the cooling water chamber 121 extends axially to both ends of the calendering roller 1. In this way, the effective use length of the calendering roller 1 is increased, and the cooling water in the cooling water chamber 121 has a sufficient cooling length for the calendering roller 1, and the entire length of the calendering roller 1 can be used as a roller section for calendering glass liquid.

[0043] Please continue to see Figure 1 , wherein the cross-sectional diameter of the cooling water chamber 121 corresponding to the axial centerline position of the calendering roller 1 is the smallest; in this way, the position with higher temperature in the middle of the calendering roller 1 corresponds to its geometric axial centerline, which facilitates the installation and use of the calendering roller 1.

[0044] In the longitudinal section of the cooling water chamber 121, the middle of the cooling water chamber 121 gradually increases in an arc shape toward both ends, so as to reduce the resistance of the cooling water flowing in the cooling water chamber 121 and better ensure the cooling effect.

[0045] The two ends of the cooling water chamber 121 are symmetrical with respect to the axial centerline of the calendering roller 1. Thus, the overall shape of the cooling water chamber 121 is centrally symmetrical, which is convenient for processing and manufacturing of the cooling water chamber 121, and does not require orientation during installation, which is convenient for use and has better cooling effect consistency.

[0046] Embodiment 2

[0047] In the actual production process, the state of the ordinary roller or the roller with a cooling water core that is large in the middle and small at both ends that originally discharges materials normally will change with the extension of the use time, and the discharged glass plate will also appear thick in the middle and thin at both ends. Embodiment 2 In view of the changing actual working conditions, the calender roller 1 is designed as a detachable assembly structure. For details, please refer to Figure 2 The calendering roller 1 is cylindrical in shape, including a cylindrical roller outer cylinder 11 and a water core matrix 12 installed in the roller outer cylinder 11. The diameter of the water core matrix 12 is matched with the inner diameter of the roller outer cylinder 11. The water core matrix 12 is slidably installed in the roller outer cylinder 11. The outer circumferential surface of the water core matrix 12 is in contact with the inner wall of the roller outer cylinder 11. The cooling water chamber 121 is opened in the water core matrix 12.

[0048] See also Figure 3 The two ends of the pressure roller outer cylinder 11 are detachably connected with an axially extending extension section 2, and the two ends of the water core matrix 12 are respectively abutted against the extension section 2 at the opposite end to limit the axial position, and a sealing ring is sandwiched between the end surface of the extension section 2 and the water core matrix 12.

[0049] During implementation, a sealing ring may be additionally provided between the extension section 2 and the end surface of the pressure roller outer cylinder 11 to further improve the sealing effect of the assembly structure.

[0050] Comparative experiment: When the calendered glass sheet is thick in the middle and thin on both sides under certain working conditions, the ordinary calendering roller water core and the special-shaped water core calendering roller of the utility model are used for comparison, and glass samples are taken after calendering respectively; the thickness difference, warpage, thickness data analysis and comparison results of the glass samples are shown in the following table:

[0051]

[0052] For a comparison of the specific change trends, see Figure 6-Figure 8 It can be seen that after using the special-shaped calendering roller water core, the thickness difference of the glass plate has a significant trend of decreasing; the overall thickness of the glass plate and the overall thickness change slope have a significant trend of decreasing, which is also conducive to reducing the thickness difference; the warping of the glass plate has a significant trend of decreasing, and the subsequent warping value tends to be stable. The reduction in the warping value also indirectly reflects that it is conducive to reducing the thickness difference.

[0053] See also Figure 4 and Figure 5The calender roller assembly structure of the second embodiment also includes a second water core 13 and a third water core 14 that are matched and used to replace the water core matrix 12;

[0054] A coaxial second cooling water chamber 131 is formed in the second water core 13 along the axial direction, and the cross-sectional diameter of the second cooling water chamber 131 gradually decreases from the middle to both ends;

[0055] A coaxial third cooling water chamber 141 is formed in the third water core 14 along the axial direction, and the third cooling water chamber 141 is of a constant diameter structure.

[0056] After removing the extension section 2 , the water core matrix 12 is knocked off, and the second water core 13 or the third water core 14 can be used to replace the water core matrix 12 and installed in the pressure roller outer cylinder 11 .

[0057] The calendering roller of the second embodiment adopts a detachable structure, and is matched with a water core matrix 12 with cooling water chambers 121 of different morphologies. In combination with changes in actual working conditions and changes in product quality, according to the temperature difference adjustment principle, the water core matrix 12 can be adaptively replaced to improve the quality of the calendered glass plate, thereby forming a calendering roller 1 that is more in line with actual working conditions and ensures the yield rate of the output!

[0058] The utility model also provides a calender, comprising at least one calender roller 1 with a special-shaped water core; the calender roller 1 is rotatably connected to the calender with its own axis as the rotation center, and can be a double-roller form or a single-roller form used with a platform, and the specific effect of improving and shaping the glass plate is the same as the above effect, and will not be repeated here.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the technical solution. Ordinary technicians in this field should understand that those modifications or equivalent replacements of the technical solution of the utility model without departing from the purpose and scope of the technical solution of the utility model should be included in the scope of the claims of the utility model.

Claims

1. Calendering roller with special-shaped water core, characterized in that: It comprises a calendering roller extending in the axial direction; a cooling water chamber is provided in the calendering roller along the axial direction thereof, and the cooling water chamber is coaxial with the calendering roller; The cross-sectional diameter of the middle portion of the cooling water chamber is smaller than the cross-sectional diameters of the two ends of the cooling water chamber.

2. The calendering roller with a special-shaped water core according to claim 1, characterized in that: The cooling water chamber extends axially to both ends of the calendering roller.

3. The calendering roller with a special-shaped water core according to claim 2, characterized in that: The cross-sectional diameter of the cooling water chamber gradually increases from the middle to both ends.

4. The calendering roller with a special-shaped water core according to claim 3, characterized in that: The cross-sectional diameter of the cooling water chamber corresponding to the axial centerline position of the calendering roller is the smallest.

5. The calendering roller with a special-shaped water core according to claim 4, characterized in that: On the longitudinal section of the cooling water chamber, the middle of the cooling water chamber gradually increases in an arc shape toward both ends.

6. The calendering roller with a special-shaped water core according to claim 5, characterized in that: The two ends of the cooling water chamber are symmetrical with respect to the axial center line of the calendering roller.

7. The calendering roller with a special-shaped water core according to any one of claims 1 to 6, characterized in that: The calendering roller has a cylindrical shape; the calendering roller includes a cylindrical roller outer cylinder and a water core base installed in the roller outer cylinder, the diameter of the water core base is matched with the inner diameter of the roller outer cylinder, the water core base is slidably installed in the roller outer cylinder, the outer circumferential surface of the water core base is in contact with the inner wall of the roller outer cylinder, and the cooling water cavity is opened in the water core base.

8. The calendering roller with a special-shaped water core according to claim 7, characterized in that: The two ends of the roller outer cylinder are detachably connected with axially extending extension sections, the two ends of the water core matrix are respectively abutted against the extension sections at the opposite ends to limit the axial position, and a sealing ring is sandwiched between the extension section and the end surface of the water core matrix or / and the roller outer cylinder.

9. The calendering roller with a special-shaped water core according to claim 8, characterized in that: Also included is a second water core that is matched and used to replace the water core matrix; A coaxial second cooling water chamber is provided in the second water core along the axial direction, and the cross-sectional diameter of the second cooling water chamber gradually decreases from the middle to both ends; After the extension section is removed, the water core matrix can be replaced with a second water core.

10. The calendering roller with a special-shaped water core according to claim 8, characterized in that: Also included is a third water core that is matched and used to replace the water core matrix; A coaxial third cooling water cavity is provided in the third water core along the axial direction, and the third cooling water cavity is of an equal-diameter structure; After the extension section is removed, the water core matrix can be replaced with a third water core.

11. A calender, characterized in that: The method comprises at least one calendering roller with a special-shaped water core as claimed in any one of claims 1 to 10; the calendering roller is rotatably connected to the calendering machine with its own axis as the rotation center.

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