An LVT multi-layer floor production line

Abstract

The present invention discloses an LVT multi-layer floor production line, which relates to the technical field of floor production, and includes a middle material layer extruder, a bottom material layer extruder, a horizontal multi-roll composite forming machine, a cooling structure, a drying structure and a shearing structure. The middle material layer extruder is used for extruding the middle material layer, the bottom material layer extruder is used for extruding the bottom material layer, and the horizontal multi-roll composite forming machine is used for composite forming the outermost layer and the bottom material layer to obtain a floor blank. After the floor blank is cooled by the cooling structure, it is dried by the drying structure, and then sheared by the shearing structure. The LVT multi-layer floor production line of the present invention can achieve continuous production, reduce equipment costs and reduce pollution.

Description

Technical Field

[0001] The present invention relates to the technical field of floor production, and particularly to an LVT multi-layer floor production line. Background Art

[0002] In the prior art, when producing multi-layer floors, after the PVC raw material is plasticized by a mixer, the middle layer and the bottom layer are obtained by pressing with a roll crusher and cutting with a cutting machine. After cutting the remaining layers (for example, the wear-resistant layer and the color film layer), they are placed in a template and sent to a laminator for pressing to form a multi-layer floor.

[0003] Among them, when using a laminator for pressing, the efficiency is low and continuous production cannot be achieved. To improve the efficiency, dozens of laminators need to be coordinated with one mixer, resulting in a high investment cost for equipment, a large occupation of the production site, and a large number of press operators. In addition, when using a mixer to prepare the board, there is also a serious pollution problem. Summary of the Invention

[0004] The purpose of the present invention is to provide an LVT multi-layer floor production line to solve the problems existing in the above prior art, which can achieve continuous production, reduce equipment costs, and reduce pollution.

[0005] To achieve the above purpose, the present invention provides the following solution:

[0006] The present invention provides an LVT multi-layer floor production line, including a middle layer extruder, a bottom layer extruder, a horizontal multi-roll composite forming machine, a cooling structure, a drying structure, and a shearing structure. The middle layer extruder is used to extrude the middle layer, the bottom layer extruder is used to extrude the bottom layer, the horizontal multi-roll composite forming machine is used to composite and form the wear-resistant layer and the bottom layer into a floor blank. After the floor blank is cooled by the cooling structure, it is dried by the drying structure, and then sheared by the shearing structure.

[0007] Preferably, the material extruded by the middle layer extruder forms the middle layer through a first die, and the material extruded by the bottom layer extruder forms the bottom layer through a second die.

[0008] Preferably, the horizontal multi-roll composite forming machine includes a wear-resistant layer film feeding structure, a color film layer film feeding structure, a middle layer calendering roll group, a bottom layer calendering roll group, a first composite embossing roll group, a first composite roll group, and a second composite embossing roll group. The middle layer calendering roll group is used to extrude the middle layer, the bottom layer calendering roll group is used to extrude the bottom layer. The wear-resistant layer released by the wear-resistant layer film feeding structure, the color film layer released by the color film layer film feeding structure, and the middle layer simultaneously pass through the first composite embossing roll group for composite embossing to obtain a first composite layer. After the first composite layer and the bottom layer are composite through the first composite roll group, they pass through the second composite embossing roll group for composite embossing to obtain a floor blank.

[0009] Preferably, the color film layer released by the color film layer releasing structure and the middle material layer are pre-pressed by a first pre-pressing roller, and the wear-resistant layer released by the wear-resistant layer releasing structure and the color film layer released by the color film layer releasing structure are pre-pressed by a second pre-pressing roller, and both the first pre-pressing roller and the second pre-pressing roller are silicone rollers.

[0010] Preferably, the horizontal multi-roll composite forming machine also includes an auxiliary radiation heating structure, which is located between the first composite embossing roller group and the first composite roller group, and is used to heat the first composite layer between the first composite embossing roller group and the first composite roller group.

[0011] Preferably, the horizontal multi-roll composite molding machine further comprises a glass fiber layer film laying structure and a bottom film layer film laying structure, and the first composite layer, the glass fiber layer laid out by the glass fiber layer film laying structure and the bottom material layer are composited by the first composite roller group to obtain a second composite layer;

[0012] The bottom film layer released from the bottom film layer releasing structure is compounded with the second composite layer by the second composite roller group to obtain a third composite layer. The second composite roller group is located between the first composite roller group and the second composite embossing roller group. The third composite layer is composite embossed by the second composite embossing roller group to obtain a floor blank.

[0013] Preferably, a power bracket is arranged between the horizontal multi-roller composite molding machine and the cooling structure, and the power bracket includes a power support, a first motor and a plurality of rollers, the rollers are arranged in parallel on the power support, the rollers are rotatably connected to the power support, each of the rollers is provided with a sprocket, each of the sprockets is connected by a chain transmission, and the sprocket is transmission-connected to the power output end of the first motor.

[0014] Preferably, the cooling structure includes a water trough, a conveyor belt, a second motor and a downward pressure assembly, the water trough is used to hold cooling water, the conveyor belt is located in the water trough, the second motor is used to drive the conveyor belt to move, the downward pressure assembly can be lifted and lowered by a lifting structure, the downward pressure assembly includes a downward pressure bracket and a plurality of pressure rollers, the plurality of pressure rollers are arranged in parallel on the downward pressure bracket, the pressure rollers are rotatably connected to the downward pressure bracket, and the plurality of pressure rollers are located above the conveyor belt.

[0015] Preferably, a traction structure and a water absorption structure are arranged between the cooling structure and the drying structure, the traction structure is arranged close to the cooling structure, the traction structure includes a pair of traction rollers, and the water absorption structure includes several pairs of sponge water absorption rollers, each of the sponge water absorption rollers is connected to the negative pressure structure.

[0016] Preferably, the drying structure includes a drying bracket, a third motor, an upper air blower, a lower air blower, an air knife, and a plurality of conveying rollers. The conveying rollers are arranged in parallel on the drying bracket and are rotatably connected to the drying bracket. The third motor is used to drive the conveying rollers to move. The upper air blower is located above the conveying rollers, and the lower air blower is located below the conveying rollers. The air knife is arranged at one end of the drying bracket close to the cooling structure.

[0017] The present invention has achieved the following technical effects compared with the prior art:

[0018] Using the LVT multi-layer floor production line of the present invention for the production of LVT multi-layer floors can achieve continuous production, solving the problems of low production efficiency, inability to continuously produce, and high equipment cost in the prior art; the present invention uses a middle layer extruder and a bottom layer extruder to reduce the pollution problem caused by the internal mixer in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is the front view of the LVT multi-layer floor production line of the present invention;

[0021] Figure 2 It is the top view of the LVT multi-layer floor production line of the present invention;

[0022] Figure 3 It is the side view of the LVT multi-layer floor production line of the present invention;

[0023] Figure 4 It is a schematic diagram of the horizontal multi-roll composite forming machine of the present invention;

[0024] Figure 5 It is a schematic diagram of the power bracket of the present invention;

[0025] Figure 6 It is a schematic diagram of the cooling structure of the present invention;

[0026] Figure 7 It is a schematic diagram of the traction structure and the water absorption structure of the present invention;

[0027] Figure 8 It is a schematic diagram of the drying structure of the present invention;

[0028] Figure 9 It is a schematic diagram of a product produced by the LVT multi-layer floor production line of the present invention;

[0029] Figure 10 Schematic diagram II of the product produced by the LVT multi-layer floor production line of the present invention;

[0030] Wherein: 1 - Middle material layer extruder, 2 - Bottom material layer extruder, 3 - Horizontal multi-roll composite forming machine, 4 - Cooling structure, 5 - Drying structure, 6 - Shearing structure, 7 - First die, 8 - Second die, 9 - First polishing roll, 10 - Second polishing roll, 11 - First composite roll, 12 - First embossing roll, 13 - First pre-pressing roll, 14 - Second pre-pressing roll, 15 - Third polishing roll, 16 - Fourth polishing roll, 17 - Third composite roll, 18 - Fourth composite roll, 19 - Fifth composite roll, 20 - Sixth composite roll, 21 - Second embossing roll, 22 - Second composite roll, 23 - Auxiliary radiation heating structure, 24 - Wear-resistant layer film feeding structure, 25 - Color film layer film feeding structure, 26 - Glass fiber layer film feeding structure, 27 - Bottom film layer film feeding structure, 28 - Wear-resistant layer, 29 - Color film layer, 30 - Middle material layer, 31 - Glass fiber layer, 32 - Bottom material layer, 33 - Bottom film layer, 34 - Power bracket, 35 - Hydraulic lifting platform, 36 - Carrier roller, 37 - Water tank, 38 - Conveyor belt, 39 - Pressing roll, 40 - Traction roll, 41 - Sponge water absorption roll, 42 - Upper blower, 43 - Lower blower, 44 - Air knife, 45 - Conveying roll. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] The object of the present invention is to provide an LVT multi-layer floor production line to solve the problems existing in the above-mentioned prior art, which can realize continuous production, reduce equipment costs, and reduce pollution.

[0033] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0034] Such as Figures 1 to 10As shown in the figure: This embodiment provides an LVT multi-layer floor production line, including a middle layer extruder 1, a bottom layer extruder 2, a horizontal multi-roll composite forming machine 3, a cooling structure 4, a drying structure 5 and a shearing structure 6. The middle layer extruder 1 is used to extrude the middle layer 30, the bottom layer extruder 2 is used to extrude the bottom layer 32, and the horizontal multi-roll composite forming machine 3 is used to composite and form the middle layer 30 and the bottom layer 32 to obtain a floor blank. After the floor blank is cooled by the cooling structure 4, it is dried by the drying structure 5, and then sheared by the shearing structure 6.

[0035] Specifically, in this embodiment, the material extruded by the middle layer extruder 1 forms the middle layer 30 through the first die 7, and the material extruded by the bottom layer extruder 2 forms the bottom layer 32 through the second die 8. The temperature of the bar extruded by the middle layer extruder 1 is 180 - 190 °C, and it forms a sheet through the first die 7 with a temperature of 170 °C; the temperature of the bar extruded by the bottom layer extruder 2 is 195 - 210 °C, and it forms a sheet through the second die 8 with a temperature of 175 °C.

[0036] In this embodiment, the horizontal multi-roll composite forming machine 3 includes a wear-resistant layer film feeding structure 24, a color film layer film feeding structure 25, a middle layer calendering roll group, a bottom layer calendering roll group, a first composite embossing roll group, a first composite roll group and a second composite embossing roll group. The middle layer calendering roll group is used to extrude the middle layer 30, and the bottom layer calendering roll group is used to extrude the bottom layer 32. The wear-resistant layer 28 released by the wear-resistant layer film feeding structure 24, the color film layer 29 released by the color film layer film feeding structure 25 and the middle layer 30 simultaneously pass through the first composite embossing roll group for composite embossing to obtain a first composite layer. After the first composite layer and the bottom layer 32 are composite through the first composite roll group, they pass through the second composite embossing roll group for composite embossing to obtain a floor blank, that is, the blank of Product 1.

[0037] In this embodiment, the intermediate layer calendering roll group includes a first calender roll 9 and a second calender roll 10, and the bottom layer calendering roll group includes a third calender roll 15 and a fourth calender roll 16. The first calender roll 9, the second calender roll 10, the third calender roll 15, and the fourth calender roll 16 are all steel rolls. A first jacket is provided in each of the first calender roll 9, the second calender roll 10, the third calender roll 15, and the fourth calender roll 16, and the temperature regulating medium introduced into the first jacket is oil. Both the intermediate layer calendering roll group and the bottom layer calendering roll group play the roles of cooling and thickness fixing. The bar extruded by the intermediate layer extruder 1 (at a temperature of 180 - 190 °C) forms a sheet (at a temperature of 170 °C) through the first die 7 and then enters the intermediate layer calendering roll group (at a temperature of 150 °C) for extrusion (at a pressure of 10 MPa) to obtain the intermediate layer 30, making the thickness of the intermediate layer 30 meet the requirements; the bar extruded by the bottom layer extruder 2 (at a temperature of 195 - 210 °C) forms a sheet (at a temperature of 175 °C) through the second die 8 and then enters the bottom layer calendering roll group (at a temperature of 157 °C) for extrusion (at a pressure of 10 MPa) to obtain the bottom layer 32, making the thickness of the bottom layer 32 meet the requirements.

[0038] In this embodiment, the color film layer 29 released by the color film layer film feeding structure 25 and the intermediate layer 30 are pre - laminated through the first pre - lamination roll 13, and the wear - resistant layer 28 released by the wear - resistant layer film feeding structure 24 and the color film layer 29 released by the color film layer film feeding structure 25 are pre - laminated through the second pre - lamination roll 14. Both the first pre - lamination roll 13 and the second pre - lamination roll 14 are silicone rubber rolls.

[0039] In this embodiment, the first composite embossing roll group includes a first embossing roll 12 and a first composite roll 11. The surface of the first embossing roll 12 is provided with patterns. The first composite roll 11 is a calender roll. A second jacket is provided in the first embossing roll 12, and a third jacket is provided in the first composite roll 11. The temperature regulating medium introduced into the second jacket is water, and the temperature regulating medium introduced into the third jacket is oil. The first embossing roll 12 is used for embossing. To ensure clear patterns, water needs to be introduced for cooling; to ensure sufficient peel strength of the first composite layer, oil needs to be introduced to ensure that the temperature of the first composite roll 11 is 160 °C, and the pressure between the first embossing roll 12 and the first composite roll 11 is 10 MPa.

[0040] Since the intermediate layer 30 has a certain temperature, the wear - resistant layer 28 and the color film layer 29 can be adhered to the intermediate layer 30 through heat, avoiding the use of adhesives for bonding. Compared with the prior art, it is more environmentally friendly.

[0041] In this embodiment, the horizontal multi - roll composite forming machine 3 further includes a glass fiber layer film feeding structure 26. The first composite layer, the glass fiber layer 31 released by the glass fiber layer film feeding structure 26, and the bottom layer 32 are compounded through the first composite roll group to obtain the second composite layer.

[0042] In this embodiment, the first composite roller group includes a third composite roller 17 and a fourth composite roller 18. Both the third composite roller 17 and the fourth composite roller 18 are smooth rollers and are made of steel. A fourth jacket is provided in both the third composite roller 17 and the fourth composite roller 18, and the temperature-regulating medium introduced into the fourth jacket is oil. The temperature of the third composite roller 17 is 175 °C, and the temperature of the fourth composite roller 18 is 155 °C. The third composite roller 17 and the fourth composite roller 18 play a role in heat preservation and compounding, ensuring that the second composite layer has sufficient peel strength. The pressure between the third composite roller 17 and the fourth composite roller 18 is 3 MPa, and the pressure is relatively small, which can avoid the pattern being flattened.

[0043] In this embodiment, the horizontal multi-roller composite forming machine 3 further includes an auxiliary radiation heating structure 23, which is located between the first composite embossing roller group and the first composite roller group. The auxiliary radiation heating structure 23 is used to heat the first composite layer between the first composite embossing roller group and the first composite roller group.

[0044] In this embodiment, the horizontal multi-roller composite forming machine 3 further includes a bottom film layer feeding structure 27. The bottom film layer 33 released by the bottom film layer feeding structure 27 is compounded with the second composite layer through the second composite roller group to obtain a third composite layer. The second composite roller group is located between the first composite roller group and the second composite embossing roller group. The third composite layer passes through the second composite embossing roller group for composite embossing to obtain a floor blank, that is, the blank of product two.

[0045] In this embodiment, the second composite roller group includes a fifth composite roller 19 and a sixth composite roller 20. The sixth composite roller 20 is a silica gel roller, and the fifth composite roller 19 is a smooth steel roller. A fifth jacket is provided in the fifth composite roller 19, and the temperature-regulating medium introduced into the fifth jacket is oil. The temperature of the fifth composite roller 19 is 120 °C.

[0046] In this embodiment, the second composite embossing roller group includes a second embossing roller 21 and a second composite roller 22. Patterns are provided on the second embossing roller 21, and the second composite roller 22 is a silica gel roller. The pressure between the second embossing roller 21 and the second composite roller 22 is 8 MPa. The bottom surface of the third composite layer is embossed by the second embossing roller 21, and the second composite roller 22 can prevent the pattern on the upper surface of the third composite layer from being flattened.

[0047] As Figures 9 to 10 shown, the horizontal multi-roller composite forming machine 3 of this embodiment is used to prepare product one formed by a wear-resistant layer 28, a color film layer 29, a middle material layer 30, and a bottom material layer 32 arranged in sequence from top to bottom, or product two formed by a wear-resistant layer 28, a color film layer 29, a middle material layer 30, a fiberglass layer 31, a bottom material layer 32, and a bottom film layer 33 arranged in sequence from top to bottom.

[0048] In this embodiment, a power bracket 34 is provided between the horizontal multi-roll composite forming machine 3 and the cooling structure 4. Product 1 or Product 2 is conveyed to the cooling structure 4 by the power bracket 34. The power bracket 34 includes a power support, a first motor, and a plurality of rollers 36. The rollers 36 are arranged in parallel on the power support and are rotatably connected to the power support. Sprockets are provided on each of the rollers 36, and the sprockets are connected by a chain drive. The sprocket is in transmission connection with the power output end of the first motor.

[0049] In this embodiment, the cooling structure 4 includes a water tank 37, a conveyor belt 38, a second motor, and a pressing component. The water tank 37 is used to hold cooling water. The conveyor belt 38 is located in the water tank 37. The second motor is used to drive the conveyor belt 38 to move. The pressing component can be lifted and lowered through a lifting structure. The pressing component includes a pressing support and a plurality of pressing rollers 39. The pressing rollers 39 are sponge rollers. The pressing rollers 39 are arranged in parallel on the pressing support and are rotatably connected to the pressing support. A plurality of pressing rollers 39 are located above the conveyor belt 38. The conveyor belt 38 can prevent Product 1 or Product 2 from being stretched during transportation. The pressing rollers 39 ensure that Product 1 or Product 2 is immersed in water and prevent Product 1 or Product 2 from floating on the water surface.

[0050] In this embodiment, a traction structure and a water absorption structure are provided between the cooling structure 4 and the drying structure 5. The traction structure is arranged close to the cooling structure 4. The traction structure includes a pair of traction rollers 40. The water absorption structure includes a plurality of pairs of sponge water absorption rollers 41. Each sponge water absorption roller 41 is communicated with a negative pressure structure. After being cooled by the cooling structure 4, Product 1 or Product 2 enters the water absorption structure under the action of the traction structure. The water absorption structure absorbs water from Product 1 or Product 2 through the sponge water absorption rollers 41 and the negative pressure structure.

[0051] In this embodiment, the drying structure 5 includes a drying support, a third motor, an upper blower 42, a lower blower 43, an air knife 44, and a plurality of conveying rollers 45. The conveying rollers 45 are arranged in parallel on the drying support and are rotatably connected to the drying support. The third motor is used to drive the conveying rollers 45 to move. The upper blower 42 is located above the conveying rollers 45. The lower blower 43 is located below the conveying rollers 45. An air knife 44 is provided at one end of the drying support close to the cooling structure 4. The air knife 44 is arranged facing the water absorption structure. The air knife 44 blows the water on the surface of Product 1 or Product 2. Product 1 or Product 2 enters between the upper blower 42 and the lower blower 43 under the action of the conveying rollers 45 to achieve air drying.

[0052] The dried Product 1 or Product 2 enters the shearing structure 6 for shearing. The shearing structure 6 is preferably a shearing machine. The sheared sheet enters the hydraulic lifting table 35.

[0053] Using the LVT multi-layer floor production line of this embodiment to produce LVT multi-layer floors can achieve continuous production, solving the problems of low production efficiency, inability to continuously produce, and high equipment costs in the prior art; this embodiment uses the intermediate layer extruder 1 and the bottom layer extruder 2 to reduce the pollution problems caused by the internal mixer in the prior art.

[0054] In this specification, specific examples are used to elaborate on the principles and implementation manners of the present invention. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A LVT multi-layer floor production line, characterized by: It comprises a middle material layer extruder, a bottom material layer extruder, a horizontal multi-roll composite molding machine, a cooling structure, a drying structure and a shearing structure, wherein the middle material layer extruder is used to extrude the middle material layer, the bottom material layer extruder is used to extrude the bottom material layer, and the horizontal multi-roll composite molding machine is used to compositely mold the middle material layer and the bottom material layer to obtain a floor blank, and after the floor blank is cooled by the cooling structure, it is dried by the drying structure and then sheared by the shearing structure; The horizontal multi-roller composite forming machine comprises a wear-resistant layer film-releasing structure, a color film layer film-releasing structure, a middle material layer calendering roller group, a bottom material layer calendering roller group, a first composite embossing roller group, a first composite roller group and a second composite embossing roller group, the middle material layer calendering roller group is used for extruding the middle material layer, the bottom material layer calendering roller group is used for extruding the bottom material layer, the color film layer released by the color film layer film-releasing structure and the middle material layer are pre-laminated by a first pre-laminated roller to obtain a first pre-laminated layer, the wear-resistant layer released by the wear-resistant layer film-releasing structure and the first pre-laminated layer are pre-laminated by a second pre-laminated roller to obtain a second pre-laminated layer, the second pre-laminated layer is compositely embossed by the first composite embossing roller group to obtain a first composite layer, the first composite layer and the bottom material layer are composited by the first composite roller group, and then compositely embossed by the second composite embossing roller group to obtain a floor blank; the first pre-laminated roller and the second pre-laminated roller are both silicone rollers; The first composite embossing roller group includes a first embossing roller and a first composite roller, the surface of the first embossing roller is provided with a pattern, the first composite roller is a smooth roller, the first embossing roller is provided with a second jacket, the first composite roller is provided with a third jacket, the temperature regulating medium introduced into the second jacket is water, and water is introduced into the second jacket for cooling to ensure clear lines, the temperature regulating medium introduced into the third jacket is oil, and oil is introduced into the third jacket for heating to ensure that the first composite layer has sufficient peeling strength; The second composite embossing roller group includes a second embossing roller and a second composite roller, the second embossing roller is provided with a pattern, and the second composite roller is a silicone roller.

2. The LVT multi-layer floor production line according to claim 1, characterized in that: The material extruded by the middle material layer extruder passes through a first die to form a middle material layer, and the material extruded by the bottom material layer extruder passes through a second die to form a bottom material layer.

3. The LVT multi-layer floor production line according to claim 1, characterized in that: The horizontal multi-roll composite forming machine also includes an auxiliary radiation heating structure, which is located between the first composite embossing roller group and the first composite roller group, and is used to heat the first composite layer between the first composite embossing roller group and the first composite roller group.

4. The LVT multi-layer floor production line according to claim 1, characterized in that: The horizontal multi-roll composite molding machine also includes a glass fiber layer film laying structure and a bottom film layer film laying structure, and the first composite layer, the glass fiber layer laid out by the glass fiber layer film laying structure and the bottom material layer are composited by the first composite roller group to obtain a second composite layer; The bottom film layer released from the bottom film layer releasing structure is compounded with the second composite layer by the second composite roller group to obtain a third composite layer. The second composite roller group is located between the first composite roller group and the second composite embossing roller group. The third composite layer is composite embossed by the second composite embossing roller group to obtain a floor blank.

5. The LVT multi-layer floor production line according to claim 1, characterized in that: A power bracket is arranged between the horizontal multi-roller composite molding machine and the cooling structure, and the power bracket includes a power support, a first motor and a plurality of rollers. The rollers are arranged in parallel on the power bracket, and the rollers are rotatably connected to the power support. A sprocket is arranged on each of the rollers, and each of the sprockets is connected through a chain transmission. The sprocket is transmission-connected to the power output end of the first motor.

6. The LVT multi-layer floor production line according to claim 1, characterized in that: The cooling structure includes a water trough, a conveyor belt, a second motor and a downward pressure assembly. The water trough is used to hold cooling water, the conveyor belt is located in the water trough, the second motor is used to drive the conveyor belt to move, and the downward pressure assembly can be lifted and lowered by a lifting structure. The downward pressure assembly includes a downward pressure bracket and a plurality of pressure rollers. The plurality of pressure rollers are arranged in parallel on the downward pressure bracket, the pressure rollers are rotatably connected to the downward pressure bracket, and the plurality of pressure rollers are located above the conveyor belt.

7. The LVT multi-layer floor production line according to claim 1, characterized in that: A traction structure and a water absorption structure are arranged between the cooling structure and the drying structure. The traction structure is arranged close to the cooling structure. The traction structure includes a pair of traction rollers. The water absorption structure includes several pairs of sponge water absorption rollers. Each of the sponge water absorption rollers is connected to the negative pressure structure.

8. The LVT multi-layer floor production line according to claim 1, characterized in that: The drying structure includes a drying bracket, a third motor, an upper fan, a lower fan, an air knife and a plurality of conveying rollers. The conveying rollers are arranged in parallel on the drying bracket. The conveying rollers are rotatably connected to the drying bracket. The third motor is used to drive the conveying rollers to move. The upper fan is located above the conveying rollers, and the lower fan is located below the conveying rollers. The air knife is arranged on one end of the drying bracket close to the cooling structure.

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