A calender and sheet production line
By installing cooling and heating components between the calendering rolls of each group of calenders, the problem of poor film lamination quality caused by excessively high temperature of PET sheet blanks was solved, achieving higher processing quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO SANYI PLASTIC MACHINERY
- Filing Date
- 2025-07-07
- Publication Date
- 2026-07-31
AI Technical Summary
During the production of PET sheets, the temperature of the preform is too high between each step of the calendering process, which leads to poor film lamination quality.
Cooling and heating components are added between the calender rolls of the calender, and the temperature of the billet is controlled by cooling fans and baking lamps to ensure that the temperature is appropriate between different processes.
Effective control of the blank temperature improves the lamination quality and overall processing quality of PET sheets.
Smart Images
Figure CN224576222U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of sheet metal production equipment technology, specifically to a calender and a sheet metal production line. Background Technology
[0002] During the processing of sheet metal blanks, steps such as lamination and embossing are required. The calender heats the blank to a certain temperature during processing, improving its plasticity. When the blank enters between the pressure rollers, the rollers apply pressure. Under this pressure, the blank undergoes plastic deformation, gradually decreasing in thickness while increasing in length and width. The calendering process completes the plasticizing, lamination, and embossing processes on the blank.
[0003] Different preforms use different raw materials and have different chemical properties. For example, PET sheets use recycled plastic as raw material. The recycled plastic is crushed, mixed with other sheet powders, and then extruded into PET sheet preforms, which are then processed using a calender.
[0004] Due to the characteristics of PET material, on the one hand, the preform needs to be heated to a certain temperature to modify it. On the other hand, during the calendering process, the temperature rise of the parts in each step is prone to be too high, which affects the processing quality between different steps. Summary of the Invention
[0005] The purpose of this application is to solve one of the aforementioned technical problems and provide a calender and sheet production line to improve the processing quality of the sheet.
[0006] To achieve the above objectives, this application adopts the following technical solution: The first aspect of this application provides a calender, comprising: The first calendering roll group includes a first calendering roll and a second calendering roll arranged with a gap, wherein the first side of the gap is the feed side and the second side of the gap is the discharge side; The third calendering roll is located on the second side of the gap between the first calendering rolls; First cooling component: Located at the third calendering roll, used to cool the billet traveling at the third calendering roll; The second calendering roll group includes a fourth calendering roll and a coating roll arranged at intervals, and is located at the rear end of the third calendering roll along the direction of the billet's travel.
[0007] In some embodiments of this application, the first cooling component includes a first cooling fan.
[0008] In some embodiments of this application, the air outlet of the first cooling fan faces the upper side of the third calendering roll.
[0009] In some embodiments of this application, a third calendering roll group is further included, which is disposed at the rear end of the second calendering roll group along the direction of the billet travel; the third calendering roll group includes a fifth calendering roll and a sixth calendering roll disposed at an interval, wherein the fifth calendering roll and / or the sixth calendering roll are patterned rolls.
[0010] In some embodiments of this application, a second cooling assembly is also included, which is disposed between the second calendering roll group and the third calendering roll group along the direction in which the billet travels.
[0011] In some embodiments of this application, a heating assembly is also included, disposed between the second cooling assembly and the third calendering roll group, along the direction in which the billet travels. In some embodiments of this application, the heating component is a heat lamp.
[0012] In some embodiments of this application, the second cooling component includes a second cooling fan.
[0013] In some embodiments of this application, a billet travel rail is provided between the second calendering roll group and the third calendering roll group, and the air outlet of the second cooling fan faces the upper side of the billet travel rail.
[0014] In some embodiments of this application, a laminating device and a guide roller are also included, the laminating device being used to export the laminating film, the laminating film being guided by the guide roller to a second calendering roller group.
[0015] The second aspect of this application provides a sheet metal production line, which includes the calendering mill provided in the first aspect of this application.
[0016] Compared with the prior art, the technical advantages of this application are as follows: Cooling and heating components have been added between the calendering rolls of the calendering mill to control the temperature of the sheet material blank. The temperature of the sheet material blank can be adjusted according to the requirements of each process and the characteristics of the sheet material blank, so as to ensure the temperature of the sheet material blank in the calendering roll group between different process steps and improve the processing quality of the sheet material in different processes. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of a calendering machine.
[0019] Figure 2 This is a schematic diagram of the calender and coating assembly.
[0020] Figure 3 This is a schematic diagram of the sheet metal production line.
[0021] 1. First calendering roll; 2. Second calendering roll; 3. Mold; 4. Third calendering roll; 5. Fourth calendering roll; 6. Coating roller; 7. First cooling fan; 8. Fifth calendering roll; 9. The sixth calendering roll; 10. Conveyor rail; 11. Second cooling fan; 12. Heat lamp; 13. Film coating device; 14. Guide rollers; 15. Cooling bracket; 16. Traction machine; 17. Edge trimming machine; 18. Follow-up shearing machine; 19. Belt conveyor; 20. Oil temperature controller; 21. Calendering machine; 22. Extruder. Detailed Implementation
[0022] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0023] The prefixes such as "first" and "second" used in this application embodiment are merely for distinguishing different descriptive objects and do not limit the position, order, priority, quantity, or content of the described objects. The use of ordinal numbers and other prefixes used to distinguish descriptive objects in this application embodiment does not constitute a limitation on the described objects. The description of the described objects is given in the claims or the context of the embodiments, and should not constitute unnecessary restrictions due to the use of such prefixes. Furthermore, in the description of this embodiment, unless otherwise stated, "multiple" means two or more.
[0024] In the description of this application, it should be noted that: the fixed connection described in this application can be a detachable fixed connection or an integrated fixed connection; the indication of orientation or positional relationship is based on the positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0025] A calender is required for processing sheet metal billets. Depending on the processing requirements, a calender typically has multiple sets of calendering rolls. The temperature of each calendering roll is configured based on the sheet metal billet's formulation and chemical properties. In existing technology, the calendering rolls of each set are structurally closely coordinated. To avoid excessive cooling of the sheet metal billet as it passes through different calendering roll sets, the gaps between different calendering roll sets are small, or only have very short travel gaps. After being processed by one calendering roll set, the sheet metal billet quickly enters another calendering roll set.
[0026] PET sheets are a special type of sheet material, unlike wood-plastic composite and stone-plastic composite flooring. PET sheets use recycled plastics as raw materials. During the production of PET sheets, it was found that the temperature of the sheet material blank during the lamination process was too high, resulting in poor lamination quality. The main reason for this problem is that the temperature between different calendering roller groups is too high. When the sheet material travels to the laminating roller group, it is maintained at a high temperature, and it is difficult to ensure the lamination quality of PET material at such high temperatures.
[0027] This situation can also occur during the processing of sheet materials made of other materials.
[0028] To address the above problems, this application provides a calender that improves the fit structure between calender rolls.
[0029] Structural reference of calender Figure 1 and Figure 2 It includes a frame 21 and a calendering roll group disposed on the frame 21, wherein the calendering roll group includes at least a first calendering roll group, a third calendering roll group, and a second calendering roll group.
[0030] The first calendering roll group includes a first calendering roll 1 and a second calendering roll 2 arranged with a gap between them. The first side of the gap between them is the feeding side, and the second side of the gap is the discharging side. The feeding side is connected to the die 3, and the die extrudes the blank into the feeding side of the first calendering roll group.
[0031] For example, the first calendering roll 1 is disposed above the second calendering roll 2. The first calendering roll 1 is mounted by a lifting assembly, which is used to adjust the distance between the first calendering roll 1 and the second calendering roll 2. The gap between them can be adjusted according to the thickness of the billet.
[0032] The third calendering roll 4 is located on the second side of the gap between the first calendering rolls, meaning that the billet processed by the first calendering rolls passes through the third calendering roll 4. For example... Figure 1 and Figure 2 As shown, the third calendering roll 4 is an independent calendering roll, and the billet travels above the third calendering roll 4, which acts as a conveyor roller. In some embodiments, in order to ensure that the billet can smoothly enter the third calendering roll 4 after exiting the first calendering roll group, a conveyor roller can be set between the third calendering roll 4 and the first calendering roll group.
[0033] The second calendering roll group includes a fourth calendering roll 5 and a coating roll 6 arranged at intervals, and is located at the rear end of the third calendering roll 4 along the direction of the billet's travel.
[0034] To improve the appearance of the sheet material, a film is usually applied to its surface. The second calendering roll group is used for this film application. For example, the fourth calendering roll 5 is positioned above the laminating roll 6, which is mounted via a lifting assembly. This lifting assembly adjusts the distance between the fourth calendering roll 5 and the laminating roll 6, and the gap between them can be adjusted according to the thickness of the sheet material.
[0035] The calender provided in this application also includes a first cooling component, which is disposed at the third calendering roll 4 and is used to cool the blank traveling at the third calendering roll 4. The blank after being processed by the first cooling component has a rapidly reduced temperature compared to the blank after exiting the first calendering roll group, which can ensure that the blank is adjusted to a suitable temperature after entering the second calendering roll group, thereby improving the film coating quality.
[0036] In some embodiments of this application, the first cooling assembly includes a first cooling fan 7.
[0037] In some embodiments of this application, the first cooling fan 7 is disposed above the third calendering roll 4, with its outlet facing the upper side of the third calendering roll 4. This structure facilitates rapid and direct cooling of the sheet material blank.
[0038] In a preferred embodiment, the first cooling fan 7 can be installed above the third calendering roll 4 via a lifting assembly, and the distance between the first cooling fan 7 and the third calendering roll 4 can be adjusted by means of the lifting assembly to adjust the cooling effect.
[0039] In some embodiments of this application, a conveying rail 10 structure is provided between the third calendering roll 4 and the second calendering roll group. The conveying rail 10 is a support roller, which does not have a heating effect. When the slab material blank walks on the support roller, it can be cooled naturally.
[0040] In some embodiments of this application, a third calendering roll group is also included, which is disposed at the rear end of the second calendering roll group along the direction of the billet travel; the third calendering roll group includes a fifth calendering roll 8 and a sixth calendering roll 9 disposed at intervals, wherein the fifth calendering roll 8 and / or the sixth calendering roll 9 are patterned rolls.
[0041] The third calendering roll group is used for embossing the sheet material. Depending on the processing requirements of different sheet materials, embossing may need to be performed on the front, back, or both. Therefore, the configuration of the pattern rolls can be selected according to the requirements. For example, the fifth calendering roll 8 is positioned above the sixth calendering roll 9. If the sheet material requires front embossing, the fifth calendering roll 8 is configured as a pattern roll; if back embossing is required, the sixth calendering roll 9 is configured as a pattern roll.
[0042] For example, the fourth calendering roll 5 is mounted via a lifting assembly for adjusting the gap between the fifth calendering roll 8 and the sixth calendering roll 9, which can be adjusted according to the thickness of the billet.
[0043] Since the lamination of the sheet material needs to be carried out under high temperature conditions, the temperature of the sheet material blank rises to a relatively high temperature after the lamination process by the second calendering roller group. If the temperature of the sheet material blank is too high, it may lead to over-embossing and affect the embossing effect.
[0044] To address this issue, some embodiments of this application further include a second cooling assembly disposed between the second and third calendering roll groups along the direction of billet travel. A conveyor rail 10 structure is provided between the second and third calendering roll groups, and this conveyor rail 10 structure is relatively long. The second cooling assembly includes a second cooling fan 11. The second cooling fan 11 can be positioned above the conveyor rail 10 between the second and third calendering roll groups, with its air outlet facing the conveyor rail 10, to directly and rapidly cool the billet on the conveyor rail 10.
[0045] Since the sheet material blank needs to be embossed after being cooled by the second cooling fan 11, and the embossing process requires the sheet material to maintain a certain temperature, and because the distance between the second and third calendering roll groups is relatively long, in order to avoid the sheet material being over-cooled, a heating component, namely a heating lamp 12, is further installed near the feed end of the third calendering roll group.
[0046] For example, the heating component is positioned above the conveyor rail 10 to facilitate direct heating of the sheet material blank.
[0047] It should be understood that in the above embodiments, the first cooling fan 7, the second cooling fan 11, and the baking lamp 12 can all be turned on or off according to the characteristics of the sheet material blank.
[0048] In some embodiments of this application, to facilitate the lamination process on the sheet metal, the calender structure further includes a laminating device 13 and a guide roller 14. The laminating device 13 is used to export the laminating film, which is then guided by the guide roller 14 to the second calender roller group. Figure 2 As shown, the laminating device 13 includes multiple film roller groups, which are detachably mounted on the bracket 15 and have the film to be laminated to the board wound on them. The film roller groups are replaceable. The guide rollers 14 are positioned according to the relationship between the laminating device 13 and the second calendering roller group to ensure that the film exiting the film roller group is smoothly guided to the second calendering roller group.
[0049] The second aspect of this application provides a sheet metal production line, which includes the calendering mill provided in the first aspect of this application.
[0050] The calender is part of the sheet metal production line. Besides the calender 21, the sheet metal production line also includes an extruder 22, a die 3, an oil temperature controller 20, a cooling support 15, a traction machine 16, an edge trimmer 17, a follow-up shear 18, and a belt conveyor 19. The powder used for sheet metal production is mixed and extruded by the extruder 22 and then enters the die 3, where it is initially shaped into sheet metal blanks. After undergoing high-temperature modification, film lamination, and embossing processes in the calender, the sheet metal blanks enter the oil temperature controller 20, cooling support 15, and traction machine 16 for further transport to the downstream end. The edge trimmer 17 trims the edges of the sheet metal in the width direction, and the follow-up shear 18 cuts the sheet metal into blocks, which are then conveyed to the end of the entire production line via the belt conveyor 19.
[0051] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A calender characterized by, include: The first calendering roll group includes a first calendering roll and a second calendering roll arranged with a gap, wherein the first side of the gap is the feed side and the second side of the gap is the discharge side; The third calendering roll is located on the second side of the gap between the first calendering rolls; First cooling component: Located at the third calendering roll, used to cool the billet traveling at the third calendering roll; The second calendering roll group includes a fourth calendering roll and a coating roll arranged at intervals, and is located at the rear end of the third calendering roll along the direction of the billet's travel.
2. The calender of claim 1, wherein The first cooling component includes a first cooling fan.
3. The calender of claim 2, wherein The air outlet of the first cooling fan faces the upper side of the third calendering roll.
4. The calender of claim 1 wherein, It also includes a third calendering roll group, which is located at the rear end of the second calendering roll group along the direction of the billet's travel; the third calendering roll group includes a fifth calendering roll and a sixth calendering roll arranged at intervals, wherein the fifth calendering roll and / or the sixth calendering roll are patterned rolls.
5. The calender of claim 4, wherein It also includes a second cooling assembly, which is disposed between the second and third calendering roll groups along the direction of the billet travel.
6. The calender of claim 4 or 5, wherein It also includes a heating assembly, which is disposed between the second cooling assembly and the third calendering roll group along the direction in which the billet travels.
7. The calender of claim 6 wherein, The heating component is a heat lamp.
8. The calender of claim 5 wherein, The second cooling component includes a second cooling fan.
9. The calender of claim 8, wherein, A billet travel rail is provided between the second and third calendering roll groups, and the outlet of the second cooling fan faces the upper side of the billet travel rail.
10. A board production line, characterized in that The calendering machine includes any one of claims 1 to 9.