LVT floor multilayer laminating production line

Abstract

The invention relates to the technical field of floor production, in particular to an LVT floor multilayer laminating production line which comprises an operation frame, a screen cloth winding roller is arranged in the center of the inner wall of the top of the operation frame, a material turning and pressing mechanism is arranged in the middle section of the interior of the operation frame, and a limiting assembly is arranged at the position, located at the upper end of the material turning and pressing mechanism, in the operation frame; the material turning and pressing mechanism comprises two sets of symmetrically-arranged L-shaped material clamping frames, the two sets of L-shaped material clamping frames are hinged to the two sides of the middle section of the operation frame correspondingly, and a vertical groove is formed in the position, located on one side, of the rear end of each L-shaped material clamping frame. According to the invention, on the basis of realizing automatic correction and alignment of a plurality of groups of floor base materials, not only can accurate fitting and splicing of double-layer base materials be completed, but also composite pressing of a plurality of layers of materials can be realized by automatically implanting a fiber web reinforcing layer, so that the fitting strength and the structural stability of floor multi-layer hot pressing are remarkably improved; and meanwhile, the production efficiency and the consistency of finished products are optimized.

Description

Technical Field

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

[0002] LVT plastic floor refers to a floor produced using polyvinyl chloride material, which is another name for PVC floor. Its main component is polyvinyl chloride material, and it has the characteristics of quick and convenient installation, moisture resistance, and durability. During the laminating process of LVT floors, in order to reduce the dimensional changes of the carpet caused by temperature, a layer of fiberglass mesh is usually embedded in the middle layer structure and the bottom layer structure of the LVT floor. Specifically, the rolled pre-impregnated fiberglass mesh is smoothly conveyed through a special unwinding mechanism and precisely embedded between the middle layer and the bottom layer materials. Since fiberglass has an extremely low coefficient of thermal expansion and a very high tensile strength, it can effectively restrain the thermal movement of the PVC matrix, prevent the floor from undergoing obvious dimensional changes due to temperature changes, and significantly improve the dimensional stability of the LVT floor.

[0003] For example, a laminating device for a new type of floor production and processing with the patent number CN211682612U symmetrically arranges two laminating components up and down, so that the composite floor placed at the opening is extruded in two directions up and down, making the laminating effect of the composite floor better. However, although the above device can achieve the lamination of multi-layer substrates, it only supports the opposing lamination of double-layer substrates and is difficult to be extended to multi-layer composite structures or the embedding of reinforcing materials (such as fiberglass mesh). This limits the substrate lamination efficiency. Moreover, during the lamination process, due to air flow disturbance and the flow of adhesives, it is easy to cause the displacement of the plates, thereby triggering the misalignment of the upper and lower substrates, which not only reduces the lamination accuracy but also affects the overall production efficiency. Summary of the Invention

[0004] The purpose of the present invention is to not only complete the precise lamination and splicing of double-layer substrates on the basis of realizing the automatic correction and alignment of multiple groups of floor substrates, but also achieve the composite lamination of multi-layer materials by automatically implanting a fiberglass mesh reinforcement layer, significantly improving the lamination strength and structural stability of multi-layer hot pressing of the floor, while also optimizing the production efficiency and product consistency.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A multi-layer laminating production line for LVT floors includes an operation frame. A mesh cloth roll is provided at the center of the inner wall of the top of the operation frame. A turning and laminating mechanism is provided at the middle section inside the operation frame, and a limiting component is provided at the upper end of the turning and laminating mechanism inside the operation frame. Among them, the material turning and pressing mechanism includes two groups of symmetrically arranged L-shaped material clamping frames. The two groups of L-shaped material clamping frames are respectively hinged on both sides of the middle section of the operation frame. A vertical groove is provided at the rear end of the L-shaped material clamping frame on one side. The material turning and pressing mechanism further includes a first motor, which is arranged at the rear end of the inner wall on one side of the operation frame, and a spiral rod one is fixedly installed at the output end of the first motor.

[0006] Further, a second spiral rod is fixedly installed at the end of the first spiral rod away from the first motor. Threaded sliding frames are sleeved on the outer sides of the first spiral rod and the second spiral rod near each other. A round shaft is fixedly installed at the center of the front end of the threaded sliding frame, and the round shaft is clamped at the top end inside the corresponding vertical groove.

[0007] Further, baffles are provided at the ends of the top surface of the L-shaped material clamping frame away from each other, and a serrated groove is provided at the center of the baffle surface. Rectangular abutting frames in an inclined shape are provided at the front and rear corners at the end of the top surface of the L-shaped material clamping frame away from the baffle. The two groups of rectangular abutting frames corresponding to each other in the front and rear are mirror-symmetrical with respect to the central axis of the L-shaped material clamping frame. The center of the bottom surface of the rectangular abutting frame is slidably connected inside the inclined groove provided at the front and rear diagonals of the top surface of the L-shaped material clamping frame through an inclined movable block. Abutting discs are rotatably connected to the front and rear ends on the side of the rectangular abutting frame close to the baffle through fixed rods.

[0008] Further, a concave sliding frame is sleeved at one end of the L-shaped material clamping frame and at the positions of the two groups of rectangular abutting frames. Chute grooves are provided at the front and rear frames of the top surface of the concave sliding frame. Sliders are fixedly installed at the centers of the tops of the two groups of rectangular abutting frames, and the sliders are slidably connected inside the chute grooves. A first cylinder is provided through a push rod at one side of the bottom of the concave sliding frame.

[0009] Further, the limiting component includes four clamping plates. The four clamping plates are respectively hinged at the top end of the operation frame, and the center of the rear end of the clamping plate is hinged to the inner wall of the rear end of the operation frame through a hinge rod. The clamping plates are grouped in pairs, and the two groups of left and right adjacent clamping plates are symmetrically inclined. Vertical rods are jointly hinged at the front and rear ends of the higher ends of the two adjacent upper and lower clamping plates.

[0010] Further, both ends of the clamping plate are arranged in a curved surface structure. The distance between the two upper clamping plates is 1 cm greater than the distance between the two lower clamping plates. A push frame is movably arranged between the upper and lower groups of clamping plates, and both ends of the push frame are respectively slidably connected to the chute grooves on both inner walls of the operation frame. A limiting groove is provided at the center of the push frame, and a second cylinder is provided through a push rod at one end of the top surface of the push frame. The top of the second cylinder is fixedly connected to the inner wall of the top of the operation frame.

[0011] Further, a first roller is rotatably connected to the inside of the operation frame at the bottom end of the material turning and pressing mechanism, and a heating roller is fixedly sleeved outside the first roller. A second roller is hinged to the inside of the operation frame at a position on each side of the two first rollers away from each other. Tilted pressing pieces are fixedly sleeved on the front and rear ends of the two second rollers. The two pressing pieces on both sides are mirror-symmetrical with respect to the central axis of the operation frame, and the top surface of the pressing piece is provided with an inclined cutting surface.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By setting the material turning and pressing mechanism, the middle and bottom base materials are respectively placed on the surfaces of two L-shaped material clamping frames. The cylinder 1 pulls the concave sliding frame, the slider and the rectangular pressing frame to move. The rectangular pressing frame will move along an inclined line until the two pressing discs at the end of the rectangular pressing frame respectively reach the corner positions of a set of adjacent sides of the board. The two rectangular pressing frames on the surface of each L-shaped material clamping frame move along the diagonal direction, and at the same time, pressure is applied to the two corners of the same base material to realize the adaptive fixation of the base material. The other set of base materials is limited in the same way to align the two sets of base materials in the center. At the same time, the first spiral rod and the second spiral rod rotate simultaneously, driving the corresponding threaded sliding frames outside them to move in the opposite direction, forcing the two L-shaped material clamping frames to rotate relative to each other by ninety degrees, and the base plates defined on the surfaces of the L-shaped material clamping frames also rotate accordingly. The clamping plates on the surfaces of the two L-shaped material clamping frames press against each other to form a composite board. This structure can not only realize the automatic alignment of multiple floor base materials, but also complete the precise fitting and splicing of double-layer base materials. 2. The present invention also cooperates with the fabric roll and the limiting component. The fabric roll releases the fiberglass mesh until the bottom end of the mesh material moves to the gap area between the two L-shaped material clamping frames. The double-base materials are pre-pressed by the synchronous rotation of the two L-shaped material clamping frames. At this time, the fiberglass mesh is jointly pressed between the two base materials. When the two baffles are turned and pressed, the two serrated grooves are meshed with each other to automatically cut off the fiberglass mesh above the pressing section. By automatically implanting the fiber mesh reinforcement layer, the composite pressing of multiple layers of materials is realized, significantly improving the bonding strength and structural stability of the multi-layer hot pressing of the floor.

[0013] 3. The present invention also sets components such as heating rollers, second rollers and pressing pieces. After the multi-layer board materials are pressed, the bottom of the board loses its limitation and slides vertically along the interval between the two L-shaped material clamping frames. The bottom of the pressed board first slides to the interval between the left and right adjacent pressing pieces and is limited by the left and right opposing pressing pieces to reduce the offset of the composite board until the composite board slides into the adjacent two heating rollers for further hot pressing and fitting to improve the fitting efficiency of the composite board. Description of the Drawings

[0014] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a perspective view of the operation frame of the present invention in a downward sectional view; Figure 3 It is a plan view of the overall structure of the present invention; Figure 4 It is a plan view of the overall operation structure of the present invention; Figure 5 It is a plan view of the operation frame of the present invention in a downward sectional view; Figure 6 It is a perspective view of the rectangular abutment frame of the present invention; Figure 7 It is a perspective view of the partial structure of the rectangular abutment frame of the present invention.

[0016] In the figure: 1. Operation frame; 2. Mesh cloth roller; 3. Material turning and pressing mechanism; 30. L-shaped material clamping frame; 31. Motor 1; 32. Spiral rotating rod 1; 33. Spiral rotating rod 2; 34. Threaded sliding frame; 35. Round shaft; 36. Baffle; 37. Rectangular abutment frame; 38. Abutment plate; 39. Concave sliding frame; 310. Slide block; 311. Cylinder 1; 4. Limit component; 41. Clamping plate; 42. Vertical rod; 43. Pushing frame; 44. Cylinder 2; 5. Roller 1; 6. Heating roller; 7. Roller 2; 8. Abutting piece. Specific embodiments

[0017] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0018] Embodiment 1: Please refer to Figure 1 - Figure 6 As shown, a multi-layer laminating production line for LVT floors includes an operation frame 1. A mesh cloth roller 2 is arranged at the center of the inner wall of the top of the operation frame 1. A material turning and pressing mechanism 3 is arranged in the middle section of the operation frame 1, and a limit component 4 is arranged at the upper end of the operation frame 1 inside the material turning and pressing mechanism 3; Among them, the material turning and pressing mechanism 3 includes two groups of symmetrically arranged L-shaped material clamping frames 30. The two groups of L-shaped material clamping frames 30 are respectively hinged on both sides of the middle section of the operation frame 1, and a vertical groove is arranged at one side of the rear end of the L-shaped material clamping frame 30; The material turning and pressing mechanism 3 further includes a first motor 31 which is arranged at the rear end of the inner wall on one side of the operation frame 1. The output end of the first motor 31 is fixedly installed with a first spiral rod 32. One end of the first spiral rod 32 far away from the first motor 31 is fixedly installed with a second spiral rod 33. One end of the first spiral rod 32 and the second spiral rod 33 close to each other is sleeved with a threaded sliding frame 34. The center of the front end of the threaded sliding frame 34 is fixedly installed with a round shaft 35 which is clamped at the top end inside the corresponding vertical groove. When laminating the middle layer board and the bottom layer board of the LVT floor, the single sides of the extruded middle layer and bottom layer base materials are respectively coated with glue, and then they are respectively placed on the surfaces of two groups of L-shaped material clamping frames 30. One end of the board body is limited and pressed by a baffle 36. Baffles 36 are arranged at the ends of the top surfaces of the L-shaped material clamping frames 30 far away from each other. The center of the surface of the baffle 36 is provided with a sawtooth groove. Rectangular pressing frames 37 with an inclined shape are arranged at the front and rear corners at the ends of the top surfaces of the L-shaped material clamping frames 30 far away from the baffle 36. The two groups of front and rear corresponding rectangular pressing frames 37 are mirror-symmetrical with respect to the central axis of the L-shaped material clamping frame 30. The center of the bottom surface of the rectangular pressing frame 37 is slidably connected to the inside of the inclined groove arranged at the front and rear diagonals of the top surface of the L-shaped material clamping frame 30 through an inclined movable block. The front and rear ends of the side of the rectangular pressing frame 37 close to the baffle 36 are rotatably connected with pressing discs 38 through fixed rods. A concave sliding frame 39 is sleeved at one end of the L-shaped material clamping frame 30 and at the positions of the two groups of rectangular pressing frames 37. The top surface of the concave sliding frame 39 is provided with sliding grooves at the front and rear side frames. The centers of the tops of the two groups of rectangular pressing frames 37 are fixedly installed with sliding blocks 310 which are slidably connected to the inside of the sliding grooves. A first cylinder 311 is arranged at one side of the bottom of the concave sliding frame 39 through a push rod. Then, the two groups of first cylinders 311 are respectively started to pull the corresponding concave sliding frames 39 to move by using the push rods. Each group of concave sliding frames 39 further pulls the corresponding sliding blocks 310 and rectangular pressing frames 37 to move. Since the bottom surface of the rectangular pressing frame 37 is slidably connected to the inclined groove through the movable block, when the rectangular pressing frame 37 is pressed and pushed, it will move along the diagonal direction. Until the two pressing discs 38 at the end of the rectangular pressing frame 37 respectively reach the corner positions of a group of adjacent sides of the board material. The two groups of rectangular pressing frames 37 on the surface of each group of L-shaped material clamping frames 30 all move along the diagonal direction, and at the same time, the two corners of the same base material are pressed, realizing the adaptive fixation of the base material. The other group of base materials is limited in the same way to make the two groups of base materials centered and aligned. Then, start Motor 1 31 to drive the first spiral rod 32 and the second spiral rod 33 to rotate simultaneously. Since the thread directions of the first spiral rod 32 and the second spiral rod 33 are opposite, when rotating in the same direction, they drive the corresponding threaded sliding frames 34 outside them to move in the opposite direction. The two sets of circular shafts 35 move away from each other and continuously press against the inner wall of the vertical groove, forcing the two L-shaped material clamping frames 30 to relatively flip by ninety degrees, and the substrate defined on the surface of the L-shaped material clamping frame 30 also flips accordingly. Thus, the clamping plates 41 on the surfaces of the two L-shaped material clamping frames 30 press against each other to form a composite board; It should be noted that after the pressing is completed, in order to achieve automatic blanking, use the first cylinder 311 to push the corresponding concave sliding frame 39 to move in the reverse direction again. The concave sliding frame 39 respectively pulls the corresponding sliders 310 and the rectangular abutting frame 37 to reset and move. Since the rectangular abutting frame 37 moves obliquely in the reverse direction until the two abutting plates 38 at the end of the rectangular abutting frame 37 are far away from the corners of the board, the bottom pressing limit of the base material is released. The pressed composite board is in a vertical state and can slide vertically after the bottom limit pressing is removed to achieve automatic blanking.

[0019] Embodiment 2: Please refer to Figure 3 and Figure 7 As shown, the limiting component 4 includes four clamping plates 41. The four groups of clamping plates 41 are respectively hinged at the top end of the operation frame 1, and the center of the rear end of the clamping plate 41 is hinged to the inner wall of the rear end of the operation frame 1 through a hinge rod. The clamping plates 41 are grouped in pairs, and the two adjacent left and right clamping plates 41 are symmetrically inclined. At the front and rear ends of the higher ends of the two adjacent upper and lower clamping plates 41, vertical rods 42 are jointly hinged; Both ends of the clamping plate 41 are arranged in a curved surface structure. The distance between the two upper clamping plates 41 is 1 cm greater than the distance between the two lower clamping plates 41. A pushing frame 43 is movably arranged between the upper and lower groups of clamping plates 41, and both ends of the pushing frame 43 are respectively slidably connected to the chute on both inner walls of the operation frame 1. A limiting groove is arranged at the center of the pushing frame 43, and a second cylinder 44 is arranged at one end of the top surface of the pushing frame 43 through a push rod. The top of the second cylinder 44 is fixedly connected to the inner wall of the top of the operation frame 1.

[0020] When adding a fiberglass mesh between the middle and bottom base materials, first, according to the above steps, place the bottom material and the middle base material on the bearing surfaces of the two L-shaped material clamping frames 30 respectively. Start the mesh roller 2 to release the fiberglass mesh until the bottom end of the mesh material moves to the gap area between the two L-shaped material clamping frames 30. Through the synchronous flipping of the two L-shaped material clamping frames 30, pre-pressing of the two base materials is achieved. At this time, the fiberglass mesh is jointly pressed between the two base materials, and when the two baffle plates 36 are flipped and pressed, the two serrated grooves are meshed with each other to automatically cut the fiberglass mesh above the pressing section, which is convenient for subsequent operations; When using the limiting component 4 to limit the glass fiber mesh, the glass fiber mesh sequentially passes through the intervals between the upper and lower sets of clamping plates 41. The upper and lower sets of curved clamping plates 41 are adjusted adaptively in angle to achieve double-sided continuous rolling of the fiber mesh and eliminate surface wrinkles. After the pressing is completed, the second cylinder 44 is activated to use the push rod to pull the push frame 43 upward. The push frame 43 moves upward and presses against the lower ends of the two upper clamping plates 41. The two upper clamping plates 41 gradually tend to balance through the lever principle, and the lower clamping plates 41 are synchronously leveled by the reverse force of the vertical rods 42 and press against the higher ends of the two sets of clamping plates 41 at the bottom layer. Therefore, the two sets of clamping plates 41 at the bottom layer also tend to balance, and the opposite ends of the two sets of clamping plates 41 at the bottom layer approach each other and jointly clamp and limit the bottom end of the glass fiber mesh, thereby reducing the waste caused by excessive traction during the cutting of the glass fiber mesh. Embodiment 3: Please refer to Figure 4 and Figure 7 As shown, a first roller 5 is rotatably connected to the bottom end of the inside of the operation frame 1 at the positions of the turnover and pressing mechanism 3, and a heating roller 6 is fixedly sleeved on the outside of the first roller 5. A second roller 7 is hinged to the positions on both sides of the inside of the operation frame 1 away from each other of the two first rollers 5. Inclined pressing pieces 8 are fixedly sleeved on the outside of the two second rollers 7 at the front and rear ends. The two pressing pieces 8 are mirror-symmetrical with respect to the central axis of the operation frame 1, and the top surface of the pressing piece 8 is provided with an inclined section. After the multi-layer board material is pressed, its bottom loses the limitation and vertically slides down along the interval between the two L-shaped material clamping frames 30. The bottom of the pressed board first slides to the interval between the left and right adjacent pressing pieces 8 and is pressed and limited by the left and right opposite pressing pieces 8 to reduce the offset of the composite board until the composite board slides into the adjacent two heating rollers 6 for further hot pressing and fitting to improve the fitting efficiency of the composite board.

[0021] Working principle: When the present invention is in use, first, the single sides of the extruded middle and bottom base materials are coated with glue, and then they are respectively placed on the surfaces of the two L-shaped material clamping frames 30, and one end of the board is limited and pressed by the baffle 36. Then, the two first cylinders 311 are respectively activated to use the push rods to pull the corresponding concave sliding frames 39 to move. Each concave sliding frame 39 further pulls the corresponding slider 310 and rectangular pressing frame 37 to move. Since the bottom surface of the rectangular pressing frame 37 is slidably connected to the inclined groove through the movable block, when the rectangular pressing frame 37 is pressed and pushed, it will move along the diagonal direction until the two pressing discs 38 at the end of the rectangular pressing frame 37 respectively reach the corner positions of a set of adjacent sides of the board. The two rectangular pressing frames 37 on the surface of each L-shaped material clamping frame 30 all move along the diagonal direction and simultaneously apply pressure to the two corners of the same base material to achieve adaptive fixation of the base material. The other base material is limited in the same way to align the two base materials in the center. Secondly, start the first motor 31 to drive the first spiral rod 32 and the second spiral rod 33 to rotate simultaneously. Since the thread directions of the first spiral rod 32 and the second spiral rod 33 are opposite, when rotating in the same direction, they drive the corresponding threaded sliding frames 34 outside them to move in the opposite direction. The two sets of round shafts 35 move away from each other and continuously press against the inner wall of the vertical groove, forcing the two sets of L-shaped material clamping frames 30 to flip relative to each other by ninety degrees, and the substrates defined on the surfaces of the L-shaped material clamping frames 30 also flip accordingly. Thus, the clamping plates 41 on the surfaces of the two sets of L-shaped material clamping frames 30 press against each other to form a composite board. Finally, use the first cylinder 311 again to push the corresponding concave sliding frame 39 to move in the reverse direction. The concave sliding frame 39 respectively pulls the corresponding sliders 310 and the rectangular abutting frames 37 to move back to their original positions. Since the rectangular abutting frames 37 move obliquely in the reverse direction, until the two abutting plates 38 at the ends of the rectangular abutting frames 37 are far away from the corners of the board, the bottom pressing limit of the base material is released. After the bottom of the composite board loses the limiting pressure, it can slide vertically downward. First, the bottom of the pressed board body slides to the interval between the two adjacent abutting pieces 8 on the left and right, and is pressed and limited by the two opposing abutting pieces 8 on the left and right to reduce the offset of the composite board body until the composite board slides into the two adjacent heating rollers 6 for further hot pressing and bonding.

[0022] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to only the specific implementation manners. Obviously, according to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments to better explain the principle and practical application of the present invention, so that those skilled in the art in the relevant technical field can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A LVT floor multi-layer lamination production line, comprising an operating frame (1), characterized in that: A mesh cloth roller (2) is arranged at the center of the inner wall at the top of the operating frame (1), a material turning and pressing mechanism (3) is arranged at the middle section inside the operating frame (1), and a limit position component (4) is arranged at the upper end of the material turning and pressing mechanism (3) inside the operating frame (1); The material turning and pressing mechanism (3) comprises two groups of symmetrically arranged L-shaped material clamping frames (30), the two groups of L-shaped material clamping frames (30) are respectively hinged at two sides of the middle section of the operating frame (1), and a vertical groove is arranged at one side of the rear end of the L-shaped material clamping frame (30). The material turning and pressing mechanism (3) also comprises a motor 1 (31), the motor 1 (31) is arranged at the rear end of the inner wall of one side of the operating frame (1), and a spiral rotating rod 1 (32) is fixedly installed at the output end of the motor 1 (31).

2. The LVT floor multi-layer laminating production line according to claim 1, characterized in that: A second spiral rod (33) is fixedly mounted on one end of the spiral rod (32) away from the first motor (31); a threaded sliding frame (34) is sleeved on the outer ends of the spiral rod (32) and the second spiral rod (33) close to each other; a round shaft (35) is fixedly mounted at the front end center of the threaded sliding frame (34); the round shaft (35) is clamped at the top end of the corresponding vertical groove.

3. The LVT floor multi-layer laminating production line according to claim 1, characterized in that: A baffle (36) is provided at one end of the top surface of the L-shaped clamping frame (30) away from the other end, and a sawtooth groove is provided at the center of the surface of the baffle (36). An inclined rectangular abutting frame (37) is provided at the front and rear corners of the end of the top surface of the L-shaped clamping frame (30) away from the baffle (36). The two groups of rectangular abutting frames (37) corresponding to the front and rear are mirror-symmetrical with respect to the central axis of the L-shaped clamping frame (30). The center of the bottom surface of the rectangular abutting frame (37) is slidably connected to the inside of the oblique groove provided at the front and rear diagonal lines of the top surface of the L-shaped clamping frame (30) through an inclined movable block. The front and rear ends of the rectangular abutting frame (37) are rotatably connected to a abutting plate (38) through a fixing rod.

4. The LVT floor multi-layer laminating production line according to claim 1, characterized in that: One end of the L-shaped clamping frame (30) is located at the two groups of rectangular abutting frames (37) and is jointly sleeved with a concave sliding frame (39), and the top surface of the concave sliding frame (39) is provided with sliding grooves at the front and rear frames, and a sliding block (310) is fixedly installed at the center of the top of the two groups of rectangular abutting frames (37), and the sliding block (310) is slidably connected inside the sliding groove, and a cylinder 1 (311) is provided at one side of the bottom of the concave sliding frame (39) through a push rod.

5. The LVT floor multi-layer laminating production line according to claim 1, characterized in that: The limit assembly (4) comprises four clamping plates (41), the four groups of clamping plates (41) are respectively hinged at the top end of the operating frame (1), and the rear end center of the clamping plates (41) is hinged to the rear end inner wall of the operating frame (1) through a hinge rod, the clamping plates (41) are grouped in pairs, and the two adjacent groups of clamping plates (41) on the left and right are symmetrically inclined, and the front and rear ends of the higher ends of the two adjacent clamping plates (41) on the upper and lower sides are hinged together with a vertical rod (42).

6. The LVT floor multi-layer laminating production line according to claim 5, characterized in that: Both ends of the clamping plate (41) are arranged in a curved structure, the spacing between the two clamping plates (41) at the upper end is greater than the spacing between the two clamping plates (41) at the lower end by 1-2 cm, a push frame (43) is movably arranged between the upper and lower groups of the clamping plates (41), and the two ends of the push frame (43) are respectively slidably connected to the slide grooves on the inner walls of both sides of the operating frame (1), a limiting groove is arranged at the center of the push frame (43), and a cylinder 2 (44) is arranged at one end of the top surface of the push frame (43) through a push rod, and the top of the cylinder 2 (44) is fixedly connected to the inner wall of the top of the operating frame (1).

7. The LVT floor multi-layer laminating production line according to claim 6, characterized in that: The operating frame (1) is internally located at the bottom end of the material turning and pressing mechanism (3), and is rotatably connected to a roller one (5), and the outside of the roller one (5) is fixedly sleeved with a heating roller (6), and the operating frame (1) is internally located at the side away from each other of the two groups of rollers one (5) and is hinged with a roller two (7), and the outside of the two groups of rollers two (7) are fixedly sleeved with inclined abutment pieces (8) at the front and rear ends, and the abutment pieces (8) on both sides are mirror-symmetrical with respect to the central axis of the operating frame (1), and the top surfaces of the abutment pieces (8) are arranged in a beveled surface.

Images