Multi-roller calender

Abstract

The utility model relates to the technical field of floor production, in particular to a multi-roller calender. The multi-roller calender comprises a thickness fixing mechanism, a color film pre-pasting mechanism, a wear-resistant layer pre-pasting mechanism and a shaping mechanism, a conveying assembly is arranged between every two adjacent roller sets, the conveying assemblies are used for conveying a base material, and the multi-roller calender can be used for compounding a color film and a wear-resistant layer on the base material in continuous production; therefore, the floor has decorative appearance and better physical properties, such as scratch resistance and wear resistance, so that the surface functionality and durability of the flat and straight floor are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to floor production technical field especially relates to a multi -roll calender. BACKGROUND

[0002] Under the background of social sustainable progress, the performance and quality requirements of PET (polyethylene terephthalate) base material are increasingly improved. In the prior art, the production of PET / PETG base material mostly uses the production equipment of WPC (wood plastic composite) or SPC (stone plastic composite). However, such equipment is not designed for the characteristics of PET / PETG material, and it is difficult to fully adapt to the high flatness requirement of PET / PETG in the base material transportation and forming process. At the same time, such base material has no functional film layer to affect the durability and application range of the product, and there is a problem that it does not completely match the high-end application demand of PET / PETG base material.

[0003] Therefore, there is an urgent need for a floor production equipment which can significantly improve the flatness and surface performance of PET / PETG base material. UTILITY MODEL CONTENT

[0004] (I) Technical problem to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a multi-roll calender, which solves the technical problems of poor flatness, low production efficiency, poor surface functionality and durability of the floor produced by the existing floor base material production equipment.

[0006] (II) Technical scheme

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the main technical scheme including:

[0008] The utility model embodiment provides a multi-roll calender, which comprises: a thickness setting mechanism for setting the thickness of the base material extruded by the extruder, a color film pre-pasting mechanism for pre-pasting the color film with the base material after thickness setting, a wear-resistant layer pre-pasting mechanism for pre-pasting the wear-resistant layer on the color film on the base material, and a shaping mechanism for pressing the pre-pasted wear-resistant layer, color film and base material; the thickness setting mechanism, color film pre-pasting mechanism, wear-resistant layer pre-pasting mechanism and shaping mechanism are sequentially and spaced apart along the direction away from the extruder, and a conveying assembly is arranged between the adjacent two; the roller surface for receiving the base material in the thickness setting mechanism, color film pre-pasting mechanism, wear-resistant layer pre-pasting mechanism and shaping mechanism and the conveying surface of the conveying assembly are all on the same horizontal reference plane.

[0009] Preferably, a plurality of heating lampshades are sequentially arranged above the conveying assembly between the wear-resistant layer pre-pasting mechanism and the shaping mechanism along the conveying direction of the conveying assembly.

[0010] Preferably, the heating lampshade can provide a radiation temperature of 160-180 degrees.

[0011] Preferably, a heat preservation plate is arranged below the conveying assembly between the wear-resistant layer pre-pasting mechanism and the shaping mechanism to preserve the substrate heated by the heating lampshade.

[0012] Preferably, the color film pre-pasting mechanism and the wear-resistant layer pre-pasting mechanism have the same structure and each include a heating roller, a driving roller and a first lifting unit; the heating roller and the driving roller are arranged oppositely, the driving roller is used for receiving the substrate, and the roller surface of the driving roller and the contact surface of the substrate are on the same horizontal reference plane as the conveying surface of the conveying assembly; the moving end of the first lifting unit is connected with the heating roller to drive the heating roller to move up and down to adjust the distance between the heating roller and the driving roller.

[0013] Preferably, the distance between the heating roller and the driving roller in the color film pre-pasting mechanism is adapted to the sum of the thicknesses of the substrate and the color film after thickness setting; and the distance between the heating roller and the driving roller in the wear-resistant layer pre-pasting mechanism is adapted to the sum of the thicknesses of the substrate, the color film and the wear-resistant layer after thickness setting.

[0014] Preferably, the thickness setting mechanism and the shaping mechanism have the same structure and each include a second lifting unit, an upper roller and a lower roller; the upper roller and the lower roller are arranged oppositely, the lower roller is used for receiving the substrate, and the roller surface of the lower roller and the contact surface of the substrate are on the same horizontal reference plane as the conveying surface of the conveying assembly; the moving end of the second lifting unit is connected with the upper roller to drive the upper roller to move up and down to adjust the distance between the upper roller and the lower roller.

[0015] Preferably, the distance between the upper roller and the lower roller in the shaping mechanism is adapted to the sum of the thicknesses of the substrate, the color film and the wear-resistant layer after thickness setting.

[0016] Preferably, the lower roller in the thickness setting mechanism is provided with a pattern.

[0017] Preferably, the multi-roller calender is suitable for PET / PETG substrates; the thickness setting mechanism, the color film pre-pasting mechanism, the wear-resistant layer pre-pasting mechanism and the shaping mechanism and the conveying assembly are integrated on one frame; and the multi-roller calender is transported by a 20GP container.

[0018] (Three) beneficial effects

[0019] The beneficial effects of the utility model are:

[0020] The multi-roller calender includes a thickness setting mechanism, a color film pre-pasting mechanism, a wear-resistant layer pre-pasting mechanism and a shaping mechanism, conveying assemblies are arranged between every two adjacent roller groups, the conveying assemblies are used for conveying the substrate, the multi-roller calender can compound the color film and the wear-resistant layer on the substrate in continuous production, so that the floor has a decorative appearance and better physical properties, such as scratch resistance and wear resistance, and the surface functionality and durability of the flat floor are improved.

[0021] Meanwhile, by arranging the contact surfaces of the rollers for receiving the base material and the conveying surface of the conveying assembly in the same horizontal reference plane, the continuous, stable and height-free support and transmission are provided for the whole process of the heat-sensitive PET / PETG base material from the extrusion to the completion of the compounding, the warping, stretching or compression stress generated in the base material conveying process due to the different heights of the rollers in the traditional equipment is eliminated, so that the high flatness of the finished floor is ensured, and the production qualified rate and production efficiency of the PET / PETG base material are improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a front view of the multi-roller calender of the utility model;

[0023] Figure 2 is Figure 1 the structure schematic view of the thickness setting mechanism and the shaping mechanism;

[0024] Figure 3 is Figure 1 the structure schematic view of the color film pre-pasting mechanism and the wear-resistant layer pre-pasting mechanism;

[0025] Figure 4 is the structure schematic view of the conveying assembly.

[0026]

BRIEF DESCRIPTION OF DRAWINGS

[0027] 1: frame body;

[0028] 2: thickness setting mechanism;

[0029] 3: color film pre-pasting mechanism;

[0030] 4: wear-resistant layer pre-pasting mechanism;

[0031] 5: shaping mechanism;

[0032] 6: conveying assembly; 61: connecting frame; 62: driving piece; 63: conveying roller;

[0033] 7: heating lampshade;

[0034] 8: heat preservation plate;

[0035] 9: adjusting roller;

[0036] 101: extruder; 102: color film; 103: wear-resistant layer;

[0037] 31: heating roller; 32: driving roller; 33: first lifting unit; 34: heating assembly;

[0038] 21: mounting frame; 22: second lifting unit; 23: upper roller; 24: lower roller. Detailed Implementation

[0039] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] This utility model embodiment provides a multi-roll calender, including a frame 1, a thickness fixing mechanism 2, a color film pre-application mechanism 3, a wear-resistant layer pre-application mechanism 4, and a shaping mechanism 5 integrated on the frame 1. The frame 1 is horizontally adjacent to the extruder 101. The thickness fixing mechanism 2, color film pre-application mechanism 3, wear-resistant layer pre-application mechanism 4, and shaping mechanism 5 are arranged sequentially at intervals along a direction away from the extruder 101. A conveying assembly 6 is provided between each adjacent assembly, and the conveying assembly 6 is also integrated on the frame 1. The conveying assembly 6 is used to convey the substrate. It should be noted that this multi-roll calender is suitable for PET / PETG substrates. In this embodiment, the frame 1 can be equipped with a drive motor to facilitate the movement of the multi-roll calender.

[0041] The multi-roll calender comprises several mechanisms: a thickness-fixing mechanism 2 for fixing the thickness of the substrate extruded by the extruder 101; a color film pre-application mechanism 3 for pre-application of the color film 102 to the substrate after thickness fixing; a wear-resistant layer pre-application mechanism 4 for pre-application of the wear-resistant layer 103 onto the color film 102 on the substrate; and a shaping mechanism 5 for pressing the pre-application of the wear-resistant layer 103, the color film 102, and the substrate together. The multi-roll calender can continuously bond the color film 102 and the wear-resistant layer 103 onto the substrate, giving the floor a decorative appearance and better physical properties, such as scratch resistance and wear resistance, thereby improving the surface functionality and durability of the flat floor. Pre-application refers to the color film 102 being connected to the substrate but being peelable under external force.

[0042] The multi-roll calender in this embodiment, with its compact and reasonable layout, can be integrated onto a single frame, and its overall size is adapted to container loading requirements, enabling it to be transported as a complete unit, making it particularly suitable for export scenarios. The multi-roll calender in this embodiment is transported using 20GP containers, which significantly reduces the required container size and lowers the space occupancy and logistics costs per shipment.

[0043] In this way, the multi-roll calender can complete all assembly and debugging work in the production plant at once, ensuring that it is in a stable operating state when it leaves the factory. After it is transported to the purchaser (especially overseas purchasers), there is no need to send multiple installation personnel to the site for secondary assembly and debugging. This not only greatly simplifies the equipment delivery process, but also significantly reduces additional costs and shortens the cycle from equipment delivery to production.

[0044] Specifically, the length of the conveying assembly 6 between the thickness fixing mechanism 2 and the color film pre-application mechanism 3 is in the range of 100-160cm; the length of the conveying assembly 6 between the color film pre-application mechanism 3 and the wear-resistant layer pre-application mechanism 4 is in the range of 60-90cm; and the length of the conveying assembly between the wear-resistant layer pre-application mechanism 4 and the shaping mechanism 5 is in the range of 100-120cm. Meanwhile, the diameter of the rollers in both the thickness fixing mechanism and the shaping mechanism is in the range of 35-45cm.

[0045] The contact surfaces of the rollers used to receive the substrate in the thickness setting mechanism 2, the color film pre-application mechanism 3, the wear-resistant layer pre-application mechanism 4, and the shaping mechanism 5, as well as the conveying surface of the conveying component 6, are all on the same horizontal reference plane. This provides continuous, stable, and height-free support and transmission for the heat-sensitive PET / PETG substrate from extrusion shaping to composite completion. It eliminates the warping, tensile, or compressive stress caused by uneven roller heights during substrate conveying in traditional equipment, thereby ensuring that the finished flooring has extremely high flatness and improving the production qualification rate and production efficiency of PET / PETG substrates.

[0046] like Figure 2 As shown, the thickness fixing mechanism 2 and the shaping mechanism 5 have the same structure, both including a mounting frame 21, a second lifting unit 22, an upper roller 23, and a lower roller 24. The upper roller 23 and the lower roller 24 are arranged vertically opposite each other on the mounting frame 21, and both the upper roller 23 and the lower roller 24 can rotate relative to the mounting frame 21 along their own axes. The lower roller 24 is used to receive the substrate. To ensure that the contact surface between the roller surface of the lower roller 24 and the substrate and the conveying surface of the conveying assembly 6 are on the same horizontal reference plane, and to prevent the lower roller 24 from moving up and down, the moving end of the second lifting unit 22 is connected to the upper roller 23, driving the upper roller 23 to move up and down to adjust the distance between the upper roller 23 and the lower roller 24. The distance between the lowest point of the upper roller 23 and the highest point of the lower roller 24 is the thickness fixing distance.

[0047] In this design, due to the elasticity of the substrate, the distance between the upper roller 23 and the lower roller 24 in the thickness setting mechanism 2 is slightly smaller than the required thickness of the substrate. The substrate output from the extruder 101 returns to the preset thickness after passing through the thickness setting mechanism 2. Similarly, the distance between the upper roller 23 and the lower roller 24 in the shaping mechanism 5 is slightly smaller than the sum of the thicknesses of the substrate, the color film 102, and the wear-resistant layer 103 after thickness setting. The specific distance is set according to the material selection of the substrate. For example, if the thickness of the substrate after extrusion is 2.2mm, and the preset thickness to be set is 2mm, then the distance between the upper roller 23 and the lower roller 24 in the thickness setting mechanism is 1.9mm; the thickness of the color film 102 is 0.07mm, and the thickness of the wear-resistant layer 103 is 0.4mm, then the distance between the upper roller 23 and the lower roller 24 in the shaping mechanism is 2.4mm. Of course, the above values ​​are just examples and should be adjusted according to different flooring models.

[0048] In this embodiment, the lower roller 24 in the thickness fixing mechanism 2 is textured, and the upper roller 23 in the thickness fixing mechanism 2 and the upper roller 23 and lower roller 24 in the shaping mechanism 5 are all mirror rollers.

[0049] To ensure the flatness of the PET / PETG substrate during the calendering process, such as Figure 4 As shown, the conveying assembly 6 includes a connecting frame 61, a driving component 62, and multiple conveying rollers 63. The multiple conveying rollers 63 are arranged side-by-side and spaced apart on the connecting frame 61, and are rotatably connected to the connecting frame 61. The driving component 62 drives the conveying rollers 63 to rotate. At this time, the contact surface between the conveying rollers 63 and the substrate is the conveying surface. To further prevent the substrate from sinking in large gaps, the center distance between two adjacent conveying rollers 63 is less than 10 cm.

[0050] Of course, the conveying component 6 can be a synchronous belt linear module. The synchronous belt linear module includes a belt, a drive pulley, a driven pulley, and a drive motor. The top of the belt is the conveying surface. The output end of the drive motor is connected to the drive pulley to drive the drive pulley to rotate. The belt is sleeved on the drive pulley and the driven pulley, and the belt is in rolling connection with the drive pulley and the driven pulley.

[0051] like Figure 3 As shown, the color filter pre-application mechanism 3 and the wear-resistant layer pre-application mechanism 4 have the same structure, both including a heating roller 31, a drive roller 32, a first lifting unit 33, a heating assembly 34, and an adjusting roller 9. Since the heating assembly 34 is located circumferentially on the heating roller 31 and extends axially along the heating roller 31 to heat it, the heating roller 31 and the drive roller 32 are arranged vertically opposite each other. The drive roller 32 is used to receive the substrate. To ensure that the contact surface between the drive roller 32 and the substrate and the conveying surface of the conveying assembly 6 are on the same horizontal reference plane, thereby preventing the drive roller 32 from moving vertically, the moving end of the first lifting unit 33 is connected to the heating roller 31, driving the heating roller 31 to move vertically to adjust the distance between the heating roller 31 and the drive roller 32. The adjusting roller 9 is rotatably connected to one side of the heating roller 31 to unfold the color filter 102 or the wear-resistant layer 103 that enters between the heating roller 31 and the drive roller 32.

[0052] In the color filter pre-application mechanism 3, the distance between the heating roller 31 and the driving roller 32 is adapted to the sum of the thicknesses of the substrate and the color filter 102 after the thickness is fixed. Since the color filter pre-application mechanism 3 is used for pre-application of the color filter 102 and the substrate, the distance between the heating roller 31 and the driving roller 32 in the color filter pre-application mechanism 3 is equal to the sum of the thicknesses of the substrate and the color filter 102 after the thickness is fixed, to ensure that the substrate and the color filter 102 can be tightly bonded during the pre-application process without excessive compression or gaps. For example, the preheating temperature of the heating roller 31 in the color filter pre-application mechanism 3 is 80°C.

[0053] The distance between the heating roller 31 and the driving roller 32 in the wear-resistant layer pre-pasting mechanism 4 is adapted to the sum of the thicknesses of the thinned substrate, the color film 102 and the wear-resistant layer 103. Since the wear-resistant layer pre-pasting mechanism 4 is used for pre-pasting the wear-resistant layer 103 on the color film 102 on the substrate, the distance between the heating roller 31 and the driving roller 32 in the wear-resistant layer pre-pasting mechanism 4 is equal to the sum of the thicknesses of the thinned substrate, the color film 102 and the wear-resistant layer 103, which not only ensures that the wear-resistant layer 103 can be stably pasted on the surface of the color film 102, but also avoids layer displacement or structural damage caused by improper distance. For example, the preheating temperature of the heating roller 31 in the wear-resistant layer pre-pasting mechanism 4 is 80°.

[0054] Since the PET / PETG substrate is prone to hardening, in order to ensure the shaping effect of the shaping mechanism 5, a plurality of heating lamp covers 7 are sequentially arranged above the conveying assembly 6 along the conveying direction between the wear-resistant layer pre-pasting mechanism 4 and the shaping mechanism 5. The heating lamp cover 7 can provide a radiation temperature of 160°-180°, thereby ensuring that the temperature of the thinned substrate, the color film 102 and the wear-resistant layer 103 remains at about 140° when entering the shaping mechanism 5 for shaping, and further ensuring the shaping effect. Preferably, the heating range length of the heating lamp cover 7 is 60-70 cm.

[0055] In order to avoid heat loss generated by the heating lamp cover 7, a heat preservation plate 8 is arranged below the conveying assembly 6 between the wear-resistant layer pre-pasting mechanism 4 and the shaping mechanism 5, for heat preservation of the substrate heated by the heating lamp cover 7 on the conveying assembly 6. The heat preservation plate 8 is composed of a silicon plate and a heat preservation layer arranged on the surface of the silicon plate, and the extension direction of the heat preservation plate 8 is the conveying direction.

[0056] Multi-roller calender production process:

[0057] The dried PET or PETG particles are put into the extruder 101, and the temperature of each zone of the screw of the extruder 101 is controlled to ensure that the substrate is uniformly extruded from the die opening of the extrusion die in a molten state. The substrate enters the upper roller 23 and the lower roller 24 in the thickness setting mechanism 2, and the distance between the upper roller 23 and the lower roller 24 is adjusted by the second lifting unit 22 to provide pressure to the substrate, so that the thickness of the substrate can be accurately controlled, and the thickness setting is completed. The lower roller 24 of the thickness setting mechanism 2 is used to add patterns to the bottom of the substrate.

[0058] The thinned substrate passes through the conveying assembly 6 and enters the heating roller 31 and the driving roller 32 of the color film pre-pasting mechanism 3. The heating roller 31 is heated by the heating assembly 34 to maintain the temperature of the heating roller 31 and thereby preheat the color film 102. The distance and pressure between the heating roller 31 and the driving roller 32 are adjusted by the first lifting unit 33, and the preheated color film 102 is pre-pasted to the thinned substrate, and the pre-pasting of the color film 102 is completed.

[0059] The base material after the color film 102 is pre-stuck enters the heating roller 31 and the driving roller 32 of the wear-resistant layer pre-sticking mechanism 4 through the conveying assembly 6, the heating roller 31 is heated through the heating assembly 34, so that the temperature of the heating roller 31 is kept, and the wear-resistant layer 103 is preheated, the interval and the pressure between the heating roller 31 and the driving roller 32 are adjusted through the first lifting unit 33, and the preheated wear-resistant layer 103 is pre-stuck to the color film 102 of the base material, and the pre-sticking of the wear-resistant layer 103 is completed.

[0060] The base material after the wear-resistant layer 103 is pre-stuck enters the upper roller 23 and the lower roller 24 of the setting mechanism 5 through the heating lampshade 7 and the heat preservation plate 8 after being heated and heat preserved, the interval between the upper roller 23 and the lower roller 24 is adjusted through the second lifting unit 22, so that the color film 102, the wear-resistant layer 103 and the base material are provided with pressure, and the color film 102, the wear-resistant layer 103 and the base material are set, the PET and PETG base material is crystallized over time, and finally the PET and PETG base material is output from the setting mechanism 5 and enters the cooling section process.

[0061] In the description of the utility model, it is understood that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "a plurality of" is two or more than two, unless otherwise specifically limited.

[0062] In the utility model, unless otherwise specifically defined and limited, the terms "installation", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.

[0063] In the utility model, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be directly contacted by the first and second features, or indirectly contacted by the first and second features through an intermediate medium. Moreover, the first feature is "on", "above" and "on" the second feature, which can be directly above or obliquely above the first feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature is "under", "below" and "under" the second feature, which can be directly below or obliquely below the first feature, or only indicates that the horizontal height of the first feature is lower than that of the second feature.

[0064] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0065] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and the person skilled in the art can modify, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A multi-roll calender, characterized in that, include: Thickness fixing mechanism (2) for fixing the thickness of the substrate extruded by the extruder (101), color film pre-attachment mechanism (3) for pre-attaching the color film (102) to the substrate after thickness fixing, wear layer pre-attachment mechanism (4) for pre-attaching the wear layer (103) to the color film (102) on the substrate, and shaping mechanism (5) for pressing the pre-attached wear layer (103), color film (102) and substrate together. The thickness fixing mechanism (2), the color film pre-application mechanism (3), the wear-resistant layer pre-application mechanism (4) and the shaping mechanism (5) are arranged in sequence at intervals along the direction away from the extruder (101), and a conveying component (6) is provided between each adjacent one. The contact surfaces of the rollers used to receive the substrate in the thickness fixing mechanism (2), the color film pre-application mechanism (3), the wear-resistant layer pre-application mechanism (4), and the shaping mechanism (5), as well as the conveying surface of the conveying assembly (6), are all on the same horizontal reference plane.

2. The multi-roll calender as described in claim 1, characterized in that: Multiple heating lamp covers (7) are sequentially arranged above the conveying assembly (6) between the wear-resistant layer pre-applying mechanism (4) and the shaping mechanism (5) along its conveying direction.

3. The multi-roll calender as described in claim 2, characterized in that: The heating lamp cover (7) can provide a radiation temperature of 160°-180°.

4. The multi-roll calender as described in claim 2, characterized in that: A heat preservation plate (8) is provided below the conveying assembly (6) between the wear-resistant layer pre-application mechanism (4) and the shaping mechanism (5) to keep the substrate heated by the heating lamp cover (7) on the conveying assembly (6) warm.

5. The multi-roll calender as described in claim 1, characterized in that: The color film pre-application mechanism (3) and the wear-resistant layer pre-application mechanism (4) have the same structure, both including a heating roller (31), a driving roller (32) and a first lifting unit (33). The heating roller (31) and the driving roller (32) are arranged opposite each other, the driving roller (32) is used to support the substrate, and the roller surface of the driving roller (32) is on the same horizontal reference plane as the contact surface of the substrate and the conveying surface of the conveying assembly (6). The moving end of the first lifting unit (33) is connected to the heating roller (31) and drives the heating roller (31) to move up and down to adjust the distance between the heating roller (31) and the drive roller (32).

6. The multi-roll calender as described in claim 5, characterized in that: The distance between the heating roller (31) and the driving roller (32) in the color film pre-application mechanism (3) is adapted to the sum of the thicknesses of the substrate and the color film (102) after the thickness is fixed; The distance between the heating roller (31) and the driving roller (32) in the wear-resistant layer pre-application mechanism (4) is adapted to the sum of the thicknesses of the substrate, the color film (102) and the wear-resistant layer (103) after the thickness is fixed.

7. The multi-roll calender as described in claim 1, characterized in that: The thickness fixing mechanism (2) and the shaping mechanism (5) have the same structure, both including a second lifting unit (22), an upper roller (23) and a lower roller (24). The upper roller (23) and the lower roller (24) are arranged opposite each other, the lower roller (24) is used to receive the substrate, and the roller surface of the lower roller (24) is on the same horizontal reference plane as the contact surface of the substrate and the conveying surface of the conveying assembly (6). The movable end of the second lifting unit (22) is connected to the upper roller (23) and drives the upper roller (23) to move up and down to adjust the distance between the upper roller (23) and the lower roller (24).

8. The multi-roll calender as described in claim 7, characterized in that: The distance between the upper roller (23) and the lower roller (24) in the shaping mechanism (5) is adapted to the sum of the thicknesses of the substrate, the color film (102) and the wear-resistant layer (103) after the thickness is fixed.

9. The multi-roll calender as described in claim 8, characterized in that: The lower roller (24) in the thickness fixing mechanism (2) has a texture.

10. The multi-roll calender as described in claim 1, characterized in that: The multi-roll calender is suitable for PET / PETG substrates; The thickness fixing mechanism (2), the color film pre-application mechanism (3), the wear-resistant layer pre-application mechanism (4), the shaping mechanism (5), and the conveying assembly (6) are integrated on a frame (1); The multi-roll calender is transported in a 20GP container.

Images