Polishing roller device for PVC (polyvinyl chloride) calendered sheet

Abstract

The utility model relates to the technical field of calendered sheet production equipment, in particular to a PVC calendered sheet pushing roller device. In the production process of the calendered sheet, the calendered sheet is heated from one side of the calendered sheet through the second roller assembly, and the calendered sheet is cooled from the other side of the calendered sheet through the first roller assembly, so that the risk of brittle rupture of the calendered sheet is reduced, flow lines on the surface of the calendered sheet are avoided, and the thickness of the calendered sheet is more uniform. One of the first roller assembly and the second roller assembly is driven to rotate through the driving assembly, the other one of the first roller assembly and the second roller assembly can freely rotate in the direction tangent to the conveying direction of the calendered sheets, and therefore the acting force of the first roller assembly and the acting force of the second roller assembly on the calendered sheets are opposite. Therefore, the stress of the calendered sheet is more uniform, and the calendered sheet is prevented from generating flow lines and cracks. Therefore, the product quality of the calendered sheet is ensured in the production process of the calendered sheet.

Description

Technical Field

[0001] The present application relates to the technical field of calendered sheet production equipment, and particularly to a polishing roller device for PVC calendered sheets. Background Art

[0002] Calendering is an important processing technology for polymer materials. By means of the strong shear force between rollers and the corresponding processing temperature, the viscous fluid material is repeatedly extruded and extended, and finally becomes a thin sheet product with a specific width and thickness. Through calendering, plastic films or sheets can be produced, and these materials have a wide range of uses, including but not limited to packaging materials in the fields of packaging, thermoforming, cosmetics, food, toys, printing, clothing, etc. For example, a PVC calendered sheet production line can produce various types of PVC transparent sheets, colored sheets, thermoforming sheets, folding box sheets, printed sheets, sheets for window pasting, etc.

[0003] In the prior art, calendering equipment with less than four rollers is mostly used in the production line equipment for producing rigid PVC sheets. Due to the limitations of the process conditions of subsequent stretching, cooling, and heat preservation processes and equipment, the thickness of the PVC sheets produced by this type of production line cannot be controlled within a relatively thin range. If the thickness is forcibly controlled within a relatively thin state through the calendering process, such products are brittle and easy to break, and are also prone to small transverse shrinkage rates due to uneven transverse thickness of the sheet, resulting in cracks or rubber accumulation during thermoforming production by product users.

[0004] In addition, in the prior art, the process control of calendering, heat preservation after calendering, and cooling links in the equipment for producing PVC sheets is not in place, often resulting in uneven transverse thickness of the produced sheets, large surface flow marks, more bubbles when the sheets are thick products, and at the same time, it is difficult to control the transverse and longitudinal shrinkage rates well, the subsequent processing range is narrow, and the rigidity of the sheets is poor.

[0005] It can be seen that how to ensure the product quality of calendered sheets during the production process of calendered sheets is a technical problem to be solved urgently. Summary of the Invention

[0006] A polishing roller device for PVC calendered sheets provided by the present application aims to solve the technical problem of how to ensure the product quality of calendered sheets during the production process of calendered sheets in the prior art.

[0007] A polishing roller device for PVC calendered sheets provided by the present application includes:

[0008] A first roller assembly for cooling the calendered sheet;

[0009] A second roller assembly for heating the calendered sheet, and the second roller assembly is arranged side by side with the first roller assembly;

[0010] A driving assembly for driving one of the first roller assembly or the second roller assembly to rotate, and the other of the first roller assembly or the second roller assembly can rotate freely along the direction tangent to the conveying direction of the calendered sheet;

[0011] Wherein, during the process that the calendered sheet passes between the first roller assembly and the second roller assembly, the calendered sheet is in contact with both the first roller assembly and the second roller assembly simultaneously.

[0012] Optionally, the driving assembly drives the second roller assembly to rotate, and the first roller assembly can rotate freely along the direction tangent to the conveying direction of the calendered sheet.

[0013] Optionally, the PVC calendered sheet polishing roller device further includes an adjusting assembly;

[0014] The adjusting assembly is used to adjust the distance between the first roller assembly and the second roller assembly.

[0015] Optionally, the adjusting assembly drives the first roller assembly to approach or move away from the second roller assembly.

[0016] Optionally, the adjusting assembly includes:

[0017] A stroke cylinder, the driving direction of the stroke cylinder is towards or away from the second roller assembly;

[0018] A connecting piece for connecting the stroke cylinder and the first roller assembly, so that the stroke cylinder drives the first roller assembly to move.

[0019] Optionally, the first roller assembly includes:

[0020] A roller member provided with a cavity for accommodating a coolant;

[0021] A liquid inlet member rotatably installed at one end of the roller member, the liquid inlet member is provided with a liquid inlet channel, and the liquid inlet channel is communicated with the cavity;

[0022] A liquid outlet member rotatably installed at the other end of the roller member, the liquid outlet member is provided with a liquid outlet channel, and the liquid outlet channel is communicated with the cavity.

[0023] Optionally, the first roller assembly further includes:

[0024] A first sealing assembly for sealing the connection between the liquid inlet member and the roller member;

[0025] A second sealing assembly for sealing the connection between the liquid outlet member and the roller member.

[0026] Optionally, the coolant includes water after being cooled down.

[0027] Wherein, during the production process, water is cooled by a refrigeration device and enters the cavity from the liquid inlet member through the liquid inlet channel, and then is discharged from the cavity through the liquid outlet channel and returns to the refrigeration device for further cooling.

[0028] Optionally, the first roller assembly further includes:

[0029] A first bearing assembly for rotatably connecting the liquid inlet member and the roller member;

[0030] A second bearing assembly for rotatably connecting the liquid outlet member and the roller member.

[0031] Optionally, the first bearing assembly is disposed between the liquid inlet member and the first sealing assembly;

[0032] The second bearing assembly is disposed between the liquid outlet member and the second sealing assembly.

[0033] The beneficial effects achieved by this application are as follows: During the production process of the calendered sheet, the calendered sheet passes between the first roller assembly and the second roller assembly, and then the calendered sheet is calendered. The second roller assembly heats the calendered sheet from one side, thereby softening the calendered sheet, making it easier for the calendered sheet to deform, reducing the risk of brittle fracture of the calendered sheet, and making the thickness of the calendered sheet more uniform. The first roller assembly cools the calendered sheet from the other side, thereby ensuring the cooling rate of the calendered sheet after calendering, avoiding deformation of the calendered sheet after calendering, thus avoiding the generation of surface flow marks on the calendered sheet, and making the thickness of the calendered sheet more uniform. By driving one of the first roller assembly or the second roller assembly to rotate by a driving assembly and making the other of the first roller assembly or the second roller assembly freely rotate in a direction tangent to the calendered sheet conveying direction, during the process that the calendered sheet passes between the first roller assembly and the second roller assembly, the acting forces of the first roller assembly and the second roller assembly on the calendered sheet are opposite, thereby making the force on the calendered sheet more uniform and avoiding the generation of flow marks and cracks on the calendered sheet. In this way, the product quality of the calendered sheet is ensured during the production process. Description of the Drawings

[0034] Figure 1 It is a schematic diagram of the principle structure of the PVC calendered sheet polishing roller device in an embodiment of the present invention;

[0035] Figure 2It is a cross-sectional view of the PVC calendered sheet polishing roller device in the embodiment of the present utility model;

[0036] Figure 3 It is in the embodiment of the present utility model Figure 2 An enlarged view of part A;

[0037] Figure 4 It is in the embodiment of the present utility model Figure 2 An enlarged view of part B.

[0038] Main unit symbol description:

[0039] 10. PVC calendered sheet polishing roller device; 20. First roller assembly; 21. Roller member; 211. Cavity; 22. Liquid inlet member; 221. Liquid inlet channel; 23. Liquid outlet member; 231. Liquid outlet channel; 24. First sealing assembly; 25. Second sealing assembly; 26. First bearing assembly; 27. Second bearing assembly; 30. Second roller assembly; 40. Driving assembly; 50. Adjusting assembly; 51. Stroke cylinder; 52. Connecting member; 60. Calendered sheet. Detailed implementation manners

[0040] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals indicate the same or similar units or units with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model, and should not be construed as a limitation to the present utility model. In addition, it should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0041] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "left", "right", "horizontal", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0042] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, "a plurality of" means two or more unless otherwise specifically defined.

[0043] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, an electrical connection, or a connection that allows mutual communication; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication between two units or the interaction relationship between two units. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0045] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present utility model. In addition, the present utility model may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present utility model provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0046] Please refer to Figure 1, in some embodiments of the present application, the present application provides a PVC calendered sheet polishing roller device 10, including: a first roller assembly 20, a second roller assembly 30, and a driving assembly 40. The first roller assembly 20 is used to cool the calendered sheet 60. The second roller assembly 30 is used to heat the calendered sheet 60, and the second roller assembly 30 is arranged side by side with the first roller assembly 20. The driving assembly 40 is used to drive one of the first roller assembly 20 or the second roller assembly 30 to rotate, and the other of the first roller assembly 20 or the second roller assembly 30 can rotate freely in a direction tangent to the conveying direction of the calendered sheet 60. Wherein, during the process that the calendered sheet 60 passes between the first roller assembly 20 and the second roller assembly 30, the calendered sheet 60 is in contact with both the first roller assembly 20 and the second roller assembly 30 at the same time.

[0047] During the production process of the calendered sheet 60, the calendered sheet 60 is made to pass between the first roller assembly 20 and the second roller assembly 30, thereby calendering the calendered sheet 60 and discharging the bubbles in the calendered sheet 60. The second roller assembly 30 heats the calendered sheet 60 from one side of the calendered sheet 60, thereby softening the calendered sheet 60, making the calendered sheet 60 easier to deform, reducing the risk of brittle cracking of the calendered sheet 60, and making the thickness of the calendered sheet 60 more uniform. The first roller assembly 20 cools the calendered sheet 60 from the other side of the calendered sheet 60, thereby ensuring the cooling speed of the calendered sheet 60 after calendering, avoiding deformation of the calendered sheet 60 after calendering, thus avoiding the generation of surface flow marks on the calendered sheet 60, and making the thickness of the calendered sheet 60 more uniform. The driving assembly 40 drives one of the first roller assembly 20 or the second roller assembly 30 to rotate, and makes the other of the first roller assembly 20 or the second roller assembly 30 rotate freely in a direction tangent to the conveying direction of the calendered sheet 60, so that during the process that the calendered sheet 60 passes between the first roller assembly 20 and the second roller assembly 30, the acting forces of the first roller assembly 20 and the second roller assembly 30 on the calendered sheet 60 are opposite, thereby making the force on the calendered sheet 60 more uniform, avoiding the generation of flow marks and cracks on the calendered sheet 60. The calendered sheet 60 is cooled by the first roller assembly 20, and the calendered sheet 60 is calendered by the first roller assembly 20 and the second roller assembly 30, so that the thickness of the calendered sheet 60 is more uniform and the rigidity of the calendered sheet 60 is improved. In this way, the product quality of the calendered sheet 60 is ensured during the production process of the calendered sheet 60.

[0048] In some embodiments of the present application, the driving assembly 40 drives the second roller assembly 30 to rotate, and the first roller assembly 20 can rotate freely in a direction tangent to the conveying direction of the calendered sheet 60.

[0049] The driving component 40 drives the second roller assembly 30 to rotate, and then during the process of heating the calendered sheet 60 by the second roller assembly 30, the calendered sheet 60 is driven to move. During the process of the calendered sheet 60 being driven to move by the second roller assembly 30, the calendered sheet 60 drives the first roller assembly 20 to rotate through friction, and the first roller assembly 20 cools the calendered sheet 60. In this way, the direction of the frictional force between the second roller assembly 30 and the calendered sheet 60 is towards the moving direction of the calendered sheet 60, and the direction of the frictional force between the first roller assembly 20 and the calendered sheet 60 is away from the moving direction of the calendered sheet 60. Thus, by making the force directions on both sides of the calendered sheet 60 opposite, it is avoided that the surface of the calendered sheet 60 has accumulated traces during the process of passing between the first roller assembly 20 and the second roller assembly 30, and the generation of flow marks on the calendered sheet 60 is avoided. The second roller assembly 30 heats the calendered sheet 60 from one side of the calendered sheet 60, and the first roller assembly 20 cools the calendered sheet 60 from the other side of the calendered sheet 60, so that the thickness of the calendered sheet 60 is more uniform and the rigidity of the calendered sheet 60 is improved.

[0050] In some embodiments of the present application, the PVC calendered sheet 60 material polishing roller device 10 further includes an adjusting component 50. The adjusting component 50 is used to adjust the distance between the first roller assembly 20 and the second roller assembly 30.

[0051] By adjusting the distance between the first roller assembly 20 and the second roller assembly 30 through the adjusting component 50, the pressure received by the calendered sheet 60 when passing between the first roller assembly 20 and the second roller assembly 30 is further adjusted. Thus, it is avoided that the surface of the calendered sheet 60 has accumulated traces due to excessive pressure on the calendered sheet 60, or the transparency of the calendered sheet 60 is difficult to meet the expectation due to too little force on the calendered sheet 60 to eliminate the flow marks on the surface of the calendered sheet 60. In this way, the magnitude of the pressure received by the calendered sheet 60 when passing between the first roller assembly 20 and the second roller assembly 30 meets the expected requirements, and thus it is avoided that the surface of the calendered sheet 60 has accumulated traces, and the flow marks on the calendered sheet 60 are eliminated, so that the transparency of the calendered sheet 60 meets the expected requirements.

[0052] In some embodiments of the present application, the adjusting component 50 drives the first roller assembly 20 to approach or move away from the second roller assembly 30.

[0053] In some embodiments of the present application, the adjusting component 50 includes: a stroke cylinder 51 and a connecting piece 52. The driving direction of the stroke cylinder 51 is towards or away from the second roller assembly 30. The connecting piece 52 is used to connect the stroke cylinder 51 and the first roller assembly 20 so that the stroke cylinder 51 drives the first roller assembly 20 to move.

[0054] By adjusting the air pressure of the stroke cylinder 51, the stroke of the stroke cylinder 51 is adjusted, and then the distance between the first roller assembly 20 and the second roller assembly 30 is adjusted, so as to adjust the pressure exerted on the calendered sheet 60 when passing between the first roller assembly 20 and the second roller assembly 30.

[0055] Please refer to Figures 2 to 4 , in some embodiments of the present application, the first roller assembly 20 includes: a roller member 21, a liquid inlet member 22, and a liquid outlet member 23. The roller member 21 is provided with a cavity 211 for accommodating a coolant. The liquid inlet member 22 is rotatably installed at one end of the roller member 21, and the liquid inlet member 22 is provided with a liquid inlet channel 221, and the liquid inlet channel 221 communicates with the cavity 211. The liquid outlet member 23 is rotatably installed at the other end of the roller member 21, and the liquid outlet member 23 is provided with a liquid outlet channel 231, and the liquid outlet channel 231 communicates with the cavity 211.

[0056] During the process of the first roller assembly 20 cooling the calendered sheet 60, the heat of the calendered sheet 60 is transferred to the cavity 211 through the roller wall of the first roller assembly 20, and then absorbed by the coolant in the cavity 211. The coolant flows into the cavity 211 from the liquid inlet channel 221 of the liquid inlet member 22, and then flows out of the cavity 211 from the liquid outlet channel 231 of the liquid outlet member 23, so that the coolant circulates between the first roller assembly 20 and the refrigeration equipment, so that the temperature of the coolant in the cavity 211 is always maintained within a preset temperature range, so that the first roller assembly 20 can continuously cool the calendered sheet 60 and ensure the cooling effect of the first roller assembly 20 on the calendered sheet 60.

[0057] In the bonded area, the refrigeration equipment includes an ice water machine or a chiller.

[0058] In some embodiments of the present application, the first roller assembly 20 further includes: a first sealing assembly 24 and a second sealing assembly 25. The first sealing assembly 24 is used to seal the connection between the liquid inlet member 22 and the roller member 21. The second sealing assembly 25 is used to seal the connection between the liquid outlet member 23 and the roller member 21.

[0059] During the process of the first roller assembly 20 being driven by the calendered sheet 60 to rotate, the roller member 21 rotates with the calendered sheet 60, while the liquid inlet member 22 and the liquid outlet member 23 do not rotate with the calendered sheet 60, thus preventing the infusion tube from being wound. By using the first sealing assembly 24 and the second sealing assembly 25 to seal the connection between the liquid inlet member 22 and the roller member 21 and the connection between the liquid outlet member 23 and the roller member 21 respectively, leakage is prevented during the relative rotation of the roller member 21 with the liquid inlet member 22 and the liquid outlet member 23.

[0060] In some embodiments of the present application, both the first sealing assembly 24 and the second sealing assembly 25 include at least one of a rotary shaft seal, a piston seal, or a mechanical seal.

[0061] In some embodiments of the present application, the coolant includes water after being cooled. Among them, during the production process, the water is cooled by a refrigeration device and then enters the cavity 211 through the liquid inlet passage 221 of the liquid inlet member 22, and then is discharged from the cavity 211 through the liquid outlet passage 231 and returned to the refrigeration device for further cooling.

[0062] During the process of the first roller assembly 20 cooling the calendered sheet 60, the heat of the calendered sheet 60 is transferred to the cavity 211 through the roller wall of the first roller assembly 20, and then is absorbed by the coolant in the cavity 211. The coolant flows into the cavity 211 from the liquid inlet passage 221 of the liquid inlet member 22, and then flows out of the cavity 211 from the liquid outlet passage 231 of the liquid outlet member 23, so that the coolant circulates between the first roller assembly 20 and the refrigeration device, so that the temperature of the coolant in the cavity 211 is always maintained within a preset temperature range, so that the first roller assembly 20 can continuously cool the calendered sheet 60 and ensure the cooling effect of the first roller assembly 20 on the calendered sheet 60.

[0063] In some embodiments of the present application, the first roller assembly 20 further includes: a first bearing assembly 26 and a second bearing assembly 27. The first bearing assembly 26 is used to rotatably connect the liquid inlet member 22 to the roller member 21. The second bearing assembly 27 is used to rotatably connect the liquid outlet member 23 to the roller member 21.

[0064] In some embodiments of the present application, the first bearing assembly 26 is disposed between the liquid inlet member 22 and the first sealing assembly 24. The second bearing assembly 27 is disposed between the liquid outlet member 23 and the second sealing assembly 25.

[0065] Working principle of the present application: During the production process of the calendered sheet 60, the calendered sheet 60 is passed between the first roller assembly 20 and the second roller assembly 30, thereby calendering the calendered sheet 60 and discharging the air bubbles in the calendered sheet 60. The second roller assembly 30 heats the calendered sheet 60 from one side of the calendered sheet 60, thereby softening the calendered sheet 60, making the calendered sheet 60 easier to deform, reducing the risk of brittle cracking of the calendered sheet 60, and making the thickness of the calendered sheet 60 more uniform. The first roller assembly 20 cools the calendered sheet 60 from the other side of the calendered sheet 60, thereby ensuring the cooling rate of the calendered sheet 60 after calendering, avoiding deformation of the calendered sheet 60 after calendering, thus avoiding the generation of surface flow marks on the calendered sheet 60, and making the thickness of the calendered sheet 60 more uniform. The driving assembly 40 drives one of the first roller assembly 20 or the second roller assembly 30 to rotate, and makes the other of the first roller assembly 20 or the second roller assembly 30 freely rotate in a direction tangent to the conveying direction of the calendered sheet 60, so that during the process of the calendered sheet 60 passing between the first roller assembly 20 and the second roller assembly 30, the acting forces of the first roller assembly 20 and the second roller assembly 30 on the calendered sheet 60 are opposite, thereby making the force on the calendered sheet 60 more uniform, avoiding the generation of flow marks and cracks on the calendered sheet 60. The first roller assembly 20 cools the calendered sheet 60, and the first roller assembly 20 and the second roller assembly 30 calender the calendered sheet 60, thereby making the thickness of the calendered sheet 60 more uniform and improving the rigidity of the calendered sheet 60. The adjusting assembly 50 adjusts the distance between the first roller assembly 20 and the second roller assembly 30, thereby adjusting the pressure received by the calendered sheet 60 when passing between the first roller assembly 20 and the second roller assembly 30, thereby avoiding the appearance of stacking marks on the surface of the calendered sheet 60 due to excessive pressure on the calendered sheet 60, or avoiding the transparency of the calendered sheet 60 being difficult to meet the expected value due to insufficient force on the calendered sheet 60 to eliminate the flow marks on the surface of the calendered sheet 60. In this way, the magnitude of the pressure received by the calendered sheet 60 during the process of passing between the first roller assembly 20 and the second roller assembly 30 meets the expected requirements, thereby avoiding the appearance of stacking marks on the surface of the calendered sheet 60, and eliminating the flow marks on the calendered sheet 60, making the transparency of the calendered sheet 60 meet the expected requirements. In this way, the product quality of the calendered sheet 60 is ensured during the production process of the calendered sheet 60.

[0066] In the description of this specification, the descriptions with reference to terms such as "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0067] In addition, the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A PVC calendering sheet polishing roller device, characterized in that: include: A first roller assembly, wherein the first roller assembly is used to cool the calendered sheet; A second roller assembly, the second roller assembly is used to heat the calendered sheet, and the second roller assembly is arranged side by side with the first roller assembly; A driving assembly, the driving assembly is used to drive one of the first roller assembly or the second roller assembly to rotate, and the other of the first roller assembly or the second roller assembly can rotate freely in a direction tangential to the conveying direction of the calendered sheet; Wherein, when the calendered sheet passes between the first roller assembly and the second roller assembly, the calendered sheet contacts the first roller assembly and the second roller assembly at the same time.

2. The PVC calendered sheet polishing roller device according to claim 1, characterized in that: The driving assembly drives the second roller assembly to rotate, and the first roller assembly can rotate freely in a direction tangential to the conveying direction of the calendered sheet.

3. The PVC calendered sheet polishing roller device according to claim 1, characterized in that: Also included are adjustment components; The adjusting assembly is used to adjust the distance between the first roller assembly and the second roller assembly.

4. The PVC calendering sheet polishing roller device according to claim 3, characterized in that: The adjusting assembly drives the first roller assembly to approach or move away from the second roller assembly.

5. The PVC calendering sheet polishing roller device according to claim 3, characterized in that: The adjustment component comprises: a stroke cylinder, wherein the driving direction of the stroke cylinder is toward or away from the second roller assembly; A connecting piece, wherein the connecting piece is used to connect the stroke cylinder and the first roller assembly so that the stroke cylinder drives the first roller assembly to move.

6. The PVC calendering sheet polishing roller device according to claim 1, characterized in that: The first roller assembly comprises: A roller member, wherein the roller member is provided with a cavity, and the cavity is used to contain a cooling liquid; A liquid inlet member, the liquid inlet member is rotatably mounted on one end of the roller member, the liquid inlet member is provided with a liquid inlet channel, and the liquid inlet channel is communicated with the cavity; A liquid outlet member is rotatably mounted on the other end of the roller member, and the liquid outlet member is provided with a liquid outlet channel, and the liquid outlet channel is communicated with the cavity.

7. The PVC calendered sheet polishing roller device according to claim 6, characterized in that: The first roller assembly also includes: A first sealing component, the first sealing component is used to seal the connection between the liquid inlet component and the roller component; A second sealing component is used to seal the connection between the liquid outlet component and the roller component.

8. The PVC calendering sheet polishing roller device according to claim 6, characterized in that: The cooling liquid includes water after the temperature is reduced; In the production process, after being cooled by the refrigeration equipment, the water enters the cavity from the liquid inlet member through the liquid inlet channel, and then is discharged from the cavity through the liquid outlet channel and returns to the refrigeration device for cooling again.

9. The PVC calendered sheet polishing roller device according to claim 7, characterized in that: The first roller assembly also includes: A first bearing assembly, the first bearing assembly is used to connect the liquid inlet member to the roller member in rotation; A second bearing assembly, wherein the second bearing assembly is used to rotatably connect the liquid outlet member to the roller member.

10. The PVC calendered sheet polishing roller device according to claim 9, characterized in that: The first bearing assembly is disposed between the liquid inlet component and the first sealing assembly; The second bearing assembly is arranged between the liquid outlet and the second sealing assembly.

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