Lvt double-machine composite production line

Abstract

The application discloses a LVT double-machine composite production line, which comprises a first extruder, a first calendering and laminating device, a heating device and a film material laminating device which are sequentially connected from right to left; the first calendering and laminating device comprises a first constant-thickness roller group, a second constant-thickness roller group and a composite roller group, the first constant-thickness roller group is located above the composite roller group, and the second constant-thickness roller group is located right of the composite roller group; the production line further comprises a second extruder and a glass fiber placing mechanism, the discharge end of the second extruder is communicated with the first constant-thickness roller group, and the glass fiber placing mechanism is installed on the top of the first calendering and laminating device; the base material and the middle material are directly extruded and laminated with glass fibers, and it is not necessary to roll, cool and then warm up in advance, so that a large amount of energy is saved and a large amount of complicated operation is reduced; the first extruder, the first calendering and laminating device, the heating device and the film material laminating device are sequentially arranged, so that only the length direction of the occupied space is occupied, and the space of the equipment is saved.

Description

Technical Field

[0001] This invention relates to the field of flooring manufacturing, and more particularly to an LVT dual-machine composite production line. Background Technology

[0002] Existing LVT flooring is made by combining multiple machines. The manufacturing process involves pre-rolling the base material, intermediate material, and surface material into rolls, cooling them, and then laminating them together using composite equipment.

[0003] The base material and intermediate material need to be rolled up in advance and cooled before being heated and compounded by the composite equipment. The process of heating after cooling results in a lot of energy waste, and it also requires transfer and handling, which occupies a lot of space and has low production efficiency. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an LVT dual-machine composite production line that eliminates the need for pre-winding, saves significant energy, saves equipment space, and reduces a large number of tedious operations.

[0005] According to a first aspect of the present invention, an LVT dual-machine composite production line includes a first extruder, a first calendering and laminating device, a heating device, and a film laminating device connected sequentially from right to left; the first calendering and laminating device includes a first thickness-fixing roller group, a second thickness-fixing roller group, and a composite roller group, the first thickness-fixing roller group being located above the composite roller group, the second thickness-fixing roller group being located to the right of the composite roller group, the first thickness-fixing roller group being used to fix the thickness of the intermediate material and convey it to the composite roller group, and the second thickness-fixing roller group being used to fix the thickness of the base material and convey it to the composite roller group; it also includes a second extruder and a glass fiber feeding mechanism, the discharge end of the second extruder being connected to the first thickness-fixing roller group, the glass fiber feeding mechanism being installed on the top of the first calendering and laminating device, and the glass fiber feeding mechanism being used to convey glass fiber to the composite roller group and to position the glass fiber between the base material and the intermediate material.

[0006] The LVT dual-machine composite production line according to embodiments of the present invention has at least the following technical effects: the base material and intermediate material are directly extruded and laminated with glass fiber without the need for pre-winding, cooling and heating, saving a lot of energy and reducing a lot of tedious operations; the first extruder, the first calendering and laminating device, the heating device and the film laminating device are arranged in sequence, occupying only the space in the length direction, saving equipment space; the positional relationship of the first thickness setting roller group, the second thickness setting roller group and the composite roller group facilitates the convergence of the base material, intermediate material and glass fiber together and reduces the volume of the first calendering and laminating device, reduces the length of the production line and reduces the footprint.

[0007] According to some embodiments of the present invention, the discharge direction of the first thickness roller group is perpendicular to the discharge direction of the second thickness roller group.

[0008] According to some embodiments of the present invention, the composite roller group includes a first composite roller and a second composite roller, the height of the axis of the first composite roller is greater than the height of the axis of the second composite roller, the feed point of the composite roller group is located to the right of the discharge point of the first thickness roller group, and the diameter of the first composite roller is smaller than the diameter of the second composite roller.

[0009] According to some embodiments of the present invention, the first calendering and bonding device further includes a rotating block, the middle portion of which is rotatably mounted to the right of the second composite roller. One end of the rotating block is connected to the first composite roller, and the other end of the rotating block is connected to a cylinder. The first composite roller 231 is a water-permeable adhesive roller.

[0010] According to some embodiments of the present invention, the first calendering and bonding apparatus further includes a tensioning roller group, which is disposed between the first thickness-fixing roller group and the second thickness-fixing roller group.

[0011] According to some embodiments of the present invention, the first extruder includes a frame, a drive motor, a reducer, a distribution box, a barrel, a hopper, a feeding device, and a hopper mounting base. The drive motor, the reducer, the distribution box, and the barrel are sequentially mounted on the frame. The end of the barrel away from the distribution box is rotatably mounted on the frame. The hopper mounting base is mounted on the distribution box. The hopper is mounted on the feeding device. The feeding device is mounted on the hopper mounting base. The hopper mounting base can drive the feeding device to rotate and adjust the height of the feeding device.

[0012] According to some embodiments of the present invention, the hopper mounting base includes a base plate, a bearing, a rotating sleeve, and a plurality of gaskets; a support column is provided on the top of the base plate; the bearing is slidably fitted onto the support column; the rotating sleeve and the base plate are spaced vertically apart, and the inner wall of the rotating sleeve is fixedly connected to the outer ring of the bearing so that the rotating sleeve can rotate around the support column; a plurality of gaskets can be stacked above and / or below the bearing; the height of the rotating sleeve can be adjusted by adjusting the number and position of the gaskets.

[0013] According to some embodiments of the present invention, the thickness of each of the gaskets may be the same or different.

[0014] According to some embodiments of the present invention, the support column includes a first cylinder and a second cylinder, the second cylinder is disposed on the top of the first cylinder, the diameter of the second cylinder is smaller than the diameter of the first cylinder, and the bearing is located above the first cylinder.

[0015] According to some embodiments of the present invention, there are two bearings, namely an upper bearing and a lower bearing, the upper bearing being located above the lower bearing, a bushing being provided between the upper bearing and the lower bearing, and a plurality of gaskets being placed between the first cylinder and the lower bearing and / or above the upper bearing.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] Additional aspects and advantages of the invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the structure of the LVT dual-machine composite production line according to an embodiment of the present invention;

[0019] Figure 2 for Figure 1 The enlarged view at point A is shown;

[0020] Figure 3 This is a schematic diagram of the structure of the first extruder;

[0021] Figure 4 This is a structural diagram of the hopper mounting base;

[0022] Figure 5 A sectional view of the hopper mounting base with the gasket positioned below the bearing;

[0023] Figure 6 This is a cross-sectional view of the hopper mounting base where the gasket is placed below the bearing.

[0024] Reference numerals: First extruder 100, frame 110, drive motor 120, reducer 130, distribution box 140, barrel 150, hopper 160, feeding device 170, first calendering and laminating device 200, first thickness-fixing roller group 210, second thickness-fixing roller group 220, composite roller group 230, first composite roller 231, second composite roller 232, rotating block 240, cylinder 250, tensioning roller group 260, heating device 300, film laminating device 400, second... Calendering and laminating device 410, color film unwinding mechanism 420, film-resistant unwinding mechanism 430, second extruder 500, glass fiber unwinding mechanism 600, glass fiber unwinding mechanism 610, glass fiber soaking machine 620, glass fiber moving channel 700, hopper mounting base 800, base plate 810, bearing 820, rotating sleeve 830, first groove 831, second groove 832, gasket 840, support column 811, first cylinder 8111, second cylinder 8112, bushing 850. Detailed Implementation

[0025] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0026] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0027] In the description of this invention, terms such as greater than, less than, and exceeding are understood to exclude the stated number. The use of "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0028] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0029] Reference Figure 1 , 2 As shown, the LVT dual-machine composite production line according to an embodiment of the present invention includes a first extruder 100, a first calendering and laminating device 200, a heating device 300, and a film laminating device 400 connected sequentially from right to left. The first extruder 100 is used to extrude the base material onto the first calendering and laminating device 200. Specifically, the first extruder 100 is a 135 flat dual extruder. The first calendering and laminating device 200 is a six-roll calender, which includes a first thickness-fixing roll group 210, a second thickness-fixing roll group 220, and a composite roll group 230. The second thickness-fixing roll group 220 is located to the right of the composite roll group 230, and the first thickness-fixing roll group 210 is located to the right of the composite roll group 230. Above the composite roller group 230, the second thickness roller group 220 is connected to the discharge port of the first extruder 100. The first extruder 100 is used to extrude the base material onto the second thickness roller group 220. The second extruder 500 is installed above the first thickness roller group 210, and the discharge port of the second extruder 500 is connected to the first thickness roller group 210. The second extruder 500 is used to extrude the intermediate material onto the first thickness roller group 210. The glass fiber feeding mechanism 600 is installed on the top of the first calendering and bonding device 200. A glass fiber moving channel 700 is provided between the first thickness roller group 210 and the second thickness roller group 220. Specifically, the heating device 300 is a heating roller channel.

[0030] The production line adopts a dual-extrusion synchronous composite method, with the fiberglass layer bonded between the base material and the intermediate material. During operation, the base material and intermediate material exit from the mold through the first extruder 100 and the second extruder 500, respectively, and are conveyed to the second thickness-fixing roller group 220 and the first thickness-fixing roller group 210, respectively. After the base material is fixed in thickness by the second thickness-fixing roller group 220, it is conveyed to the left to the feed point of the composite roller group 230. After the intermediate material is fixed in thickness by the first thickness-fixing roller group 210, it is conveyed downward to the feed point of the composite roller group 230. There is an angle between the intermediate material and the base material. The glass fiber placement mechanism 600 drives the glass fiber to move, so that the glass fiber passes through the glass fiber moving channel 700 and is placed between the intermediate material and the base material and conveyed to the composite roller group 230. Since the extruded material is still at a high temperature, the composite roller group 230 can directly composite it together with the glass fiber layer. After composite, it is conveyed to the heating device 300. The heating device 300 aligns the composite layer, heats and keeps it warm, and conveys it to the film bonding device 400. The film bonding device 400 directly bonds the color film and the durable film to the composite layer to complete the multi-layer composite.

[0031] The base material and intermediate material are directly extruded and laminated with glass fiber, eliminating the need for pre-winding, cooling, and heating, thus saving significant energy and reducing numerous cumbersome operations. The first extruder 100, the first calendering and laminating device 200, the heating device 300, and the film laminating device 400 are arranged sequentially, occupying only the space along the length, saving equipment space. The positional relationship of the first thickness-fixing roller group 210, the second thickness-fixing roller group 220, and the composite roller group 230 facilitates the convergence of the base material, intermediate material, and glass fiber, reduces the volume of the first calendering and laminating device 200, shortens the production line length, and reduces the floor space required.

[0032] In some embodiments of the present invention, such as Figure 2 As shown, the discharge direction of the first thickness-fixing roller group 210 is perpendicular to the discharge direction of the second thickness-fixing roller group 220. The trajectory of the lines connecting the centers of the roller axes of the first thickness-fixing roller group 210 and the second thickness-fixing roller group 220 forms an "L" shape. This further facilitates the convergence of the base material, intermediate material, and glass fiber, reduces the volume of the first calendering and bonding device 200, reduces the length of the production line, and lowers the floor space required.

[0033] In a further embodiment of the present invention, such as Figure 2 As shown, the composite roller group 230 includes a first composite roller 231 and a second composite roller 232. The height of the axis of the first composite roller 231 is greater than the height of the axis of the second composite roller 232. The feed point of the composite roller group 230 is located to the right of the discharge point of the first thickness-fixing roller group 210. The diameter of the first composite roller 231 is smaller than the diameter of the second composite roller 232. This is to facilitate composite bonding and achieve the best composite effect.

[0034] In a further embodiment of the present invention, such as Figure 2As shown, the first calendering and bonding device 200 also includes a rotating block 240. The center of the rotating block 240 is rotatably mounted to the right of the second composite roller 232. One end of the rotating block 240 is connected to the first composite roller 231, and the other end of the rotating block 240 is connected to a cylinder 250. The first composite roller 231 is a water-permeable adhesive roller. The cylinder 250 drives the rotating block 240 to rotate, causing the water-permeable adhesive roller to press the material. At the same time, the water-permeable adhesive roller circulates water to cool the material, making the material temperature controllable. This allows for better bonding at suitable temperature and pressure, improving the quality of the flooring.

[0035] In some embodiments of the present invention, such as Figure 2 As shown, the first calendering and bonding device 200 also includes a tension roller group 260, which is located between the first thickness-fixing roller group 210 and the second thickness-fixing roller group 220. The glass fiber is tensioned by the tension roller group 260 and then conveyed to the composite roller group 230. The tension roller group 260 is provided to ensure that the glass fiber is laminated with the base material and intermediate material in a straight line, thus ensuring the quality of the lamination.

[0036] In some embodiments of the present invention, such as Figure 1 As shown, the fiberglass unwinding mechanism 600 includes a fiberglass unwinding mechanism 610 and a fiberglass soaking machine 620, with the fiberglass soaking machine 620 located on one side of the fiberglass unwinding mechanism 610. During operation, the fiberglass unwinding mechanism 610 conveys the fiberglass to the fiberglass soaking machine 620 for soaking, and after soaking, it is conveyed to the tension roller group 260, and then to the composite roller group 230.

[0037] In a further embodiment of the present invention, such as Figure 1 As shown, there are two fiberglass unwinding mechanisms 610. When the fiberglass in one of the fiberglass unwinding mechanisms 610 is used up, it can be quickly replenished.

[0038] In some embodiments of the present invention, such as Figure 1 As shown, the film bonding device 400 includes a second calendering bonding device 410, a color film unwinding mechanism 420, and a wear-resistant film unwinding mechanism 430. The second calendering bonding device 410 is connected to the output end of the heating device 300. The color film unwinding mechanism 420 and the wear-resistant film unwinding mechanism 430 are mounted on top of the second calendering bonding device 410. During operation, the color film unwinding mechanism 420 conveys the color film to the second calendering bonding device 410, and the wear-resistant film unwinding mechanism 430 conveys the wear-resistant film to the second calendering bonding device 410. The color film and the wear-resistant film are directly bonded to the composite layer to complete the multi-layer composite.

[0039] In a further embodiment of the present invention, such as Figure 1 As shown, there are two color filter unwinding mechanisms 420 and two film unwinding mechanisms 430. When the color filter in one of the color filter unwinding mechanisms 420 is used up, or when the film in one of the film unwinding mechanisms 430 is used up, it can be quickly replenished.

[0040] In a further embodiment of the present invention, the second calendering and bonding device 410 is a five-roll calender.

[0041] In some embodiments of the present invention, such as Figure 3 As shown, the first extruder includes a frame 110, a drive motor 120, a reducer 130, a distribution box 140, a barrel 150, a hopper 160, a feeding device 170, and a hopper mounting base 800. The drive motor 120, reducer 130, distribution box 140, and barrel 150 are sequentially mounted on the frame 110. The end of the barrel 150 away from the distribution box 140 is rotatably mounted on the frame 110. The hopper mounting base 800 is mounted on the distribution box 140. The hopper 160 is mounted on the feeding device 170. The feeding device 170 is mounted on the hopper mounting base 800. The hopper mounting base 800 can drive the feeding device 170 to rotate and adjust the height of the feeding device 170.

[0042] like Figure 3 As shown, when the screw needs to be repaired, the feeding device 170 is disconnected from the barrel 150, the feeding device 170 is rotated, and then the barrel 150 is rotated to repair the screw inside. This allows for screw replacement and other maintenance operations to be performed without removing the hopper 160, making the entire maintenance process safe, simple, and quick. The hopper mounting base 800 can change the height of the feeding device 170, which in turn changes the height of the hopper 160. The hopper 160 can be matched with different models of reducers 130 via the hopper mounting base 800. This is because the hopper mounting base 800 is used to accommodate the differences in the external dimensions of the reducers 130 matched with the extruder due to differences in manufacturing processes and brands. For example, when matching a reducer 130 from manufacturer A, its height dimension is 'a'; when matching a reducer 130 from manufacturer B, its height dimension is 'b'. The purpose of the hopper mounting base 800 is to accommodate these two dimensional differences during installation, meaning that both manufacturers can use the hopper mounting base 800. Existing hopper mounting bases 800 achieve their final matching height by cutting material, while the hopper mounting base 800 allows for vertical adjustment without further processing, avoiding material waste and simplifying adjustment.

[0043] In a further embodiment of the present invention, such as Figure 4 , 5As shown, the hopper mounting base 800 includes a base plate 810, a bearing 820, a rotating sleeve 830, and several shims 840; a support column 811 is provided on the top of the base plate 810; the bearing 820 is slidably fitted onto the support column 811; the rotating sleeve 830 and the base plate 810 are spaced vertically apart, and the inner wall of the rotating sleeve 830 is fixedly connected to the outer ring of the bearing 820 so that the rotating sleeve 830 can rotate around the support column 811; several shims 840 can be stacked above and / or below the bearing 820; the height of the rotating sleeve 830 can be adjusted by adjusting the number and position of the shims 840.

[0044] For example, such as Figure 5 , 6 As shown, the base plate 810 and the support column 811 are an integral structure. The support column 811 is located at the top of the base plate 810 and extends upward. The bearing 820 is sleeved on the support column 811, and the bearing 820 and the support column 811 are in clearance fit. The bearing 820 can move up and down along the support column 811. The rotating sleeve 830 is sleeved on the bearing 820. The support column 811 may have a protruding structure (the first cylinder 8111 described below). The protruding structure supports the bearing 820, thereby positioning the rotating sleeve 830 above the base plate 810, allowing the rotating sleeve 830 to rotate around the support column 811 via the bearing 820. The shims 840 are located inside the rotating sleeve 830. Several shims 840 can be placed entirely below the bearing 820, entirely above the bearing 820, or partially below and partially above the bearing 820. Figure 6 As shown, when all the shims 840 are below the bearing 820, the stacked shims 840 support the bearing 820, raising the height of the rotating sleeve 830 so that the rotating sleeve 830 is in its highest position; as Figure 5 As shown, when all the shims 840 are above the bearing 820, the shims 840 are stacked on top of the bearing 820, and the rotating sleeve 830 is in the lowest position. Specifically, the thickness of each shim 840 can be the same or different. Taking four shims 840 as an example, the thicknesses of the four shims 840 are 5mm, 3mm, 2mm and 1mm respectively. The adjustment range of the rotating sleeve 830 is 11mm, allowing the four shims 840 to be combined and placed in different positions, so that the rotating sleeve 830 can be raised to different heights. Figure 3 , 4 As shown, during installation, the base plate 810 is fixed to the distribution box 140 with four hexagon socket bolts, and the rotating sleeve 830 is connected to the feeding device 170. At this time, the feeding device 170 and the hopper 160 can rotate freely together 360 degrees. The height of the rotating sleeve 830 can be raised or lowered by changing the position of the shim 840, which is simple to adjust.

[0045] In a further embodiment of the present invention, such as Figure 5 ,6 As shown, the support column 811 includes a first cylinder 8111 and a second cylinder 8112. The second cylinder 8112 is located on top of the first cylinder 8111, and its diameter is smaller than that of the first cylinder 8111. The bearing 820 is located above the first cylinder 8111. The first cylinder 8111 can be the aforementioned protruding structure. When the gaskets 840 are all above the bearing 820, the lower surface of the bearing 820 abuts against the upper surface of the first cylinder 8111. The rotating sleeve 830 is vertically spaced from the base plate 810. The support column 811 is divided into the first cylinder 8111 and the second cylinder 8112 to ensure that the rotating sleeve 830 can rotate above the base plate 810. The gaskets 840 can be placed between the first cylinder 8111 and the bearing 820.

[0046] In a further embodiment of the present invention, such as Figure 5 , 6 As shown, there are two bearings 820, namely an upper bearing and a lower bearing. The upper bearing is located above the lower bearing. A bushing 850 is provided between the upper bearing and the lower bearing. Several shims 840 can be placed between the first cylinder 8111 and the lower bearing and / or above the upper bearing.

[0047] The gasket 840 can be placed on top of the upper bearing and / or bottom of the lower bearing; two bearings 820 are provided to ensure smooth rotation of the rotating sleeve 830. Specifically, the lower bearing is a tapered roller bearing 820, and the upper bearing 820 is a deep groove ball bearing 820200; as... Figure 5 As shown, the bottom of the rotating sleeve 830 is provided with a first groove 831 that is recessed from bottom to top, and the lower bearing is located in the first groove 831. The top of the rotating sleeve 830 is provided with a second groove 832 that is recessed from top to bottom, and the upper bearing is located in the second groove 832. The first groove 831 and the second groove 832 are provided to prevent the bearing 820 from loosening and to facilitate the positioning and installation of the bearing 820.

[0048] In the description of this specification, references to terms such as "some embodiments" or "as one might imagine" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An LVT dual-machine composite production line, characterized in that, It includes, from right to left, a first extruder, a first calendering and laminating device, a heating device, and a film laminating device; The first calendering and bonding device includes a first thickness-fixing roller group, a second thickness-fixing roller group, and a composite roller group. The first thickness-fixing roller group is located above the composite roller group, and the second thickness-fixing roller group is located to the right of the composite roller group. The first thickness-fixing roller group is used to fix the thickness of the intermediate material and convey it to the composite roller group, and the second thickness-fixing roller group is used to fix the thickness of the base material and convey it to the composite roller group. It also includes a second extruder and a glass fiber feeding mechanism. The discharge end of the second extruder is connected to the first thickness roller group. The glass fiber feeding mechanism is installed on the top of the first calendering and bonding device. The glass fiber feeding mechanism is used to convey glass fiber onto the composite roller group and to position the glass fiber between the base material and the intermediate material. The discharge direction of the first thickness roller group is perpendicular to the discharge direction of the second thickness roller group; The trajectory of the lines connecting the centers of the roller shafts of the first and second thickness roller groups forms an L-shape. The first extruder includes a frame, a drive motor, a reducer, a distribution box, a barrel, a hopper, a feeding device, and a hopper mounting base. The drive motor, the reducer, the distribution box, and the barrel are sequentially mounted on the frame. The end of the barrel away from the distribution box is rotatably mounted on the frame. The hopper mounting base is mounted on the distribution box. The hopper is mounted on the feeding device. The feeding device is mounted on the hopper mounting base. The hopper mounting base can drive the feeding device to rotate and adjust the height of the feeding device. When the screw needs maintenance, the feeding device is disconnected from the barrel, the feeding device is rotated, and then the barrel is rotated to maintain the screw inside. The hopper mounting base includes a base plate, bearings, a rotating sleeve, and several gaskets; The top of the base plate is provided with a support column; The bearing is slidably fitted onto the outside of the support column; The rotating sleeve and the base plate are spaced apart vertically, and the inner wall of the rotating sleeve is fixedly connected to the outer ring of the bearing so that the rotating sleeve can rotate around the support column; Several of the aforementioned shims may be stacked above and / or below the bearing; the height of the rotating sleeve can be adjusted by adjusting the number and position of the shims. The base plate is fixed to the distribution box by four hex bolts, and the rotating sleeve is connected to the feeding device. The support column includes a first cylinder and a second cylinder, the second cylinder is disposed on the top of the first cylinder, the diameter of the second cylinder is smaller than the diameter of the first cylinder, and the bearing is located above the first cylinder; There are two bearings, namely an upper bearing and a lower bearing. The upper bearing is located above the lower bearing. A bushing is provided between the upper bearing and the lower bearing. Several shims can be placed between the first cylinder and the lower bearing and / or above the upper bearing. The base plate and the support column are an integral structure; The bottom of the rotating sleeve is provided with a first groove that is recessed from bottom to top, and the lower bearing is located in the first groove. The top of the rotating sleeve is provided with a second groove that is recessed from top to bottom, and the upper bearing is located in the second groove.

2. The LVT dual-machine composite production line according to claim 1, characterized in that: The composite roller assembly includes a first composite roller and a second composite roller. The height of the axis of the first composite roller is greater than the height of the axis of the second composite roller. The feed point of the composite roller assembly is located to the right of the discharge point of the first thickness roller assembly. The diameter of the first composite roller is smaller than the diameter of the second composite roller.

3. The LVT dual-machine composite production line according to claim 2, characterized in that: The first calendering and bonding device further includes a rotating block, the middle of which is rotatably mounted to the right of the second composite roller. One end of the rotating block is connected to the first composite roller, and the other end of the rotating block is connected to a cylinder. The first composite roller is a water-permeable adhesive roller.

4. The LVT dual-machine composite production line according to claim 1, characterized in that: The first calendering and bonding device further includes a tensioning roller group, which is located between the first thickness-fixing roller group and the second thickness-fixing roller group.

5. The LVT dual-machine composite production line according to claim 1, characterized in that: The thickness of each of the gaskets may be the same or different.

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