Coextruded floor production line

Abstract

The present application relates to the technical field of co-extrusion floor production, in particular to a co-extrusion floor production line, a film placing machine is used for placing protective film, and the protective film is pressed on the upper end surface of the floor semi-finished product under the extrusion and plastic shaping of the calender on the floor semi-finished product; the rotating frame is counterclockwise rotated under the driving of the driving mechanism, so as to adjust the rolling distance between the second rolling cylinder and the first rolling cylinder and the rolling distance between the third rolling cylinder and the top rolling cylinder, and at the same time, the second tensioning roller is pulled to move horizontally to the direction close to the first tensioning roller through the rope mechanism. The present application can meet the rolling of co-extrusion floors with different thicknesses through the driving of the driving mechanism, and at the same time, the floor semi-finished product after the film passing between the first tensioning roller and the second tensioning roller can be tensioned, so that the floor semi-finished product after the film can be ensured to be in a flat state, and the efficiency of the rolling and plastic shaping of the floor semi-finished product can be improved through twice rolling.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of co-extrusion floor production, in particular to a co-extrusion floor production line. BACKGROUND

[0002] Co-extrusion floor is an environmentally friendly and high-performance floor material, usually made of multiple layers of different materials through co-extrusion process. This type of floor has been widely used in the market, especially in commercial and residential buildings, because it combines the advantages of multiple materials, providing a durable, easy-to-clean and aesthetically pleasing floor solution.

[0003] During the production process of co-extrusion floor, the floor semi-finished product extruded by the extruder needs to pass through the corresponding extrusion rollers in the calender, and then the distance between the extrusion rollers is adjusted to shape the floor semi-finished product. The existing calender has two groups of extrusion rollers, which makes the floor semi-finished product only extruded between the two groups of extrusion rollers, resulting in low extrusion shaping efficiency. Some calenders have more than two groups of extrusion rollers, which need to be adjusted one by one to adjust the distance between the corresponding extrusion rollers, which is not convenient to use. Therefore, we propose a co-extrusion floor production line. SUMMARY

[0004] The purpose of the present application is to provide a co-extrusion floor production line to solve the problems raised in the background.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a co-extrusion floor production line, comprising a film placing machine and a calender located below the film placing machine, the film placing machine is used for placing protective film, and the protective film is pressed on the upper end surface of the floor semi-finished product under the extrusion and shaping action of the calender on the floor semi-finished product;

[0006] The calender comprises a mounting frame, a first rolling cylinder movably mounted on the front side inside the mounting frame, a first tensioning cylinder movably mounted on the right side inside the mounting frame, a second tensioning cylinder mounted at the rear end of the mounting frame, and two groups of parallel rotating frames movably mounted on the front side above the mounting frame;

[0007] The film placing machine comprises a top rolling cylinder mounted on the top of the mounting frame, two groups of rotating frames movably mounted with a second rolling cylinder above the first rolling cylinder and a third rolling cylinder below the top rolling cylinder, and the two sides of the rotating frame are connected to the two ends of the second tensioning cylinder through a rope mechanism;

[0008] The rotating frame is driven counterclockwise by the driving mechanism, so as to adjust the rolling distance between the second rolling cylinder and the first rolling cylinder and the rolling distance between the third rolling cylinder and the top rolling cylinder, and at the same time, the second tensioning cylinder is pulled by the rope mechanism to move horizontally towards the first tensioning cylinder.

[0009] Preferably, the film placing machine further comprises a film placing roller and a first guide roller installed on the top of the platform, and a second guide roller installed on the lower end of the platform.

[0010] The protective film on the film placing roller passes through the first guide roller, the right side and top of the second guide roller, the left side of the top rolling cylinder, the top of the first tensioning cylinder, and the bottom of the second tensioning cylinder in sequence. The lower end of the platform is installed with a support through a diagonal brace, and the mounting bracket is arranged below the platform.

[0011] Preferably, the top of the two groups of rotating frames is connected through a connecting frame, and the fixed cylindrical rods at both ends of the connecting frame extend through and protrude out of the arc-shaped through slot on the side of the mounting bracket.

[0012] The connecting shafts are fixed to the outer side of the middle of the rotating frame, and the outer side end of one group of connecting shafts is connected with a gear after extending through the side of the mounting bracket.

[0013] The driving mechanism comprises a mounting plate and a sliding rail fixed to the side of the mounting bracket, and a rack slidably connected to the top of the sliding rail. A hydraulic cylinder is installed on the mounting plate, the output end of which extends through the mounting plate and is connected to one end of the rack, and the gear is engaged with the upper end of the rack.

[0014] Preferably, the middle of the gear is provided with a plug-in hole for inserting the connecting shaft, and the two sides of the plug-in hole are provided with clamping grooves. The connecting shaft is provided with a clamping block clamped in the corresponding clamping groove, and a first spring inside the clamping groove is connected to the side of the clamping block.

[0015] Preferably, the rope mechanism comprises a winding wheel fixed after the cylindrical rod protrudes through the arc-shaped through slot, a rope connected to the winding wheel, and a first guide wheel, a second guide wheel, and a limiting seat installed on the side of the mounting bracket.

[0016] The two ends of the second tensioning cylinder are movably connected with a moving seat, which is slidably connected in a sliding groove inside the limiting seat. The rope extends into the limiting seat after passing through the top of the first guide wheel and the bottom of the second guide wheel, and is fixedly connected to the front end of the moving seat.

[0017] The right end of the limiting seat is fixed with a U-shaped seat through bolts, and the U-shaped seat is also provided with a sliding groove inside. The limiting grooves are arranged in the middle of the upper and lower ends of the sliding groove. The limiting protrusions on the moving seat are slidably connected in the limiting grooves. A long screw rod penetrates through the right end of the limiting seat, and the left end of the long screw rod extends into the limiting seat, and is sleeved with a second spring and screwed to the middle of the right end of the moving seat.

[0018] Compared with the prior art, the present application has the beneficial effects that: through the driving of the driving mechanism, the rolling distance between the second rolling cylinder and the first rolling cylinder, the rolling distance between the third rolling cylinder and the top rolling cylinder, and the distance between the first tensioning cylinder and the second tensioning cylinder can be adjusted at the same time, the floor semi-finished product is conveniently passed, and subsequent rolling of co-extrusion floor of different thicknesses can be met, and at the same time, the floor semi-finished product after film covering passing between the first tensioning cylinder and the second tensioning cylinder can be tensioned, so that the floor semi-finished product after film covering drawn out of the calender is ensured to be in a flat state, and wrinkles and the like are avoided.

[0019] The second rolling cylinder and the first rolling cylinder roll the floor semi-finished product, and the third rolling cylinder and the top rolling cylinder roll the floor semi-finished product twice, so that the efficiency of rolling and shaping of the floor semi-finished product is improved through twice rolling. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a front view structural schematic diagram of the whole application.

[0021] Figure 2 It is a sectional view structural schematic diagram of the calender and the film feeding machine.

[0022] Figure 3 It is a sectional view structural schematic diagram of the floor semi-finished product and the protective film passing through the inside of the calender.

[0023] Figure 4 It is a sectional view structural schematic diagram of the calender rolling the floor semi-finished product and the protective film.

[0024] Figure 5 It is an exploded structural schematic diagram of the second tensioning cylinder and the mounting frame assembly.

[0025] Figure 6 It is an exploded structural schematic diagram of the rotating frame, the second rolling cylinder and the third rolling cylinder assembly.

[0026] Figure 7 It is a sectional view structural schematic diagram of the driving mechanism.

[0027] Figure 8 It is a sectional view structural schematic diagram of the gear.

[0028] Figure 9 It is an exploded structural schematic diagram of the moving seat, the U-shaped seat, the second spring and the long screw rod assembly.

[0029] Figure 10 It is a three-dimensional structural schematic diagram of the whole calender.

[0030] In the figure: 1, drying machine; 2, receiving groove; 3, conveying auger; 4, hopper; 5, extruder; 6, mold; 7, calender; 71, second rolling cylinder; 72, first rolling cylinder; 73, third rolling cylinder; 74, first tensioning cylinder; 75, second tensioning cylinder; 76, mounting frame; 77, rotating frame; 771, connecting frame; 772, cylindrical rod; 773, winding wheel; 774, connecting shaft; 775, gear; 776, first spring; 777, clamping block; 778, clamping groove; 779, plug-in hole; 78, moving seat; 781, limiting protrusion; 79, U-shaped seat; 791, second spring; 792, long screw rod; 793, limiting groove; 794, bolt; 8, film placing machine; 81, film placing roller; 82, first guide roller; 83, second guide roller; 84, top rolling cylinder; 9, cooling and shaping table; 10, traction machine; 11, cutting machine; 12, plate carrying machine; 13, platform; 14, inclined support; 15, support; 16, hydraulic cylinder; 17, arc-shaped through groove; 18, rope; 19, first guide wheel; 20, mounting plate; 21, sliding rail; 22, rack; 23, second guide wheel; 24, sliding groove; 25, limiting seat. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] Embodiment:

[0033] Please refer to Figures 1-10 The present application provides a technical solution:

[0034] Embodiment one:

[0035] A co-extrusion floor production line, comprising a film placing machine 8 and a calender 7 located below the film placing machine 8, further comprising a drying machine 1, a feeding machine, an extruder 5, a cooling and shaping table 9, a traction machine 10, a cutting machine 11 and a plate carrying machine 12 arranged in sequence from left to right, and the calender 7 and the film placing machine 8 are arranged between the extruder 5 and the cooling and shaping table 9.

[0036] The drying machine 1 is used for drying the raw materials of the co-extrusion floor, the feeding machine comprises a receiving groove 2, a conveying auger 3 connected with the bottom of the receiving groove 2 and a hopper 4 fixed on the top of the left end of the extruder 5, and the right end of the extruder 5 is provided with a mold 6.

[0037] The raw material of the co-extruded floor is dried by the drying machine 1, and then enters the receiving groove 2, and is conveyed by the conveying screw 3 to the hopper 4, and then is extruded from the die 6 at the right end of the extruder 5 to form the floor semi-product;

[0038] The film dispenser 8 is used to dispense the protective film, and the protective film is pressed on the upper end surface of the floor semi-product under the extrusion and shaping of the calender 7.

[0039] The calender 7 comprises a mounting frame 76, a first rolling cylinder 72 movably mounted on the front side inside the mounting frame 76, a first tensioning cylinder 74 movably mounted on the right side inside the mounting frame 76, a second tensioning cylinder 75 mounted at the rear end of the mounting frame 76, and two groups of rotating frames 77 movably mounted on the front side above the mounting frame 76.

[0040] The film dispenser 8 comprises a top rolling cylinder 84 mounted on the top of the mounting frame 76, a second rolling cylinder 71 movably mounted above the first rolling cylinder 72 and a third rolling cylinder 73 movably mounted below the top rolling cylinder 84 between the two groups of rotating frames 77, and the two sides of the rotating frames 77 are connected to the two ends of the second tensioning cylinder 75 through a rope mechanism.

[0041] The rotating frames 77 rotate counterclockwise under the drive of the driving mechanism, so as to adjust the rolling distance between the second rolling cylinder 71 and the first rolling cylinder 72 and the rolling distance between the third rolling cylinder 73 and the top rolling cylinder 84, and at the same time, the second tensioning cylinder 75 is pulled by the rope mechanism to move horizontally towards the first tensioning cylinder 74.

[0042] Embodiment Two:

[0043] In this embodiment, as shown in Figure 2 and 3 The film dispenser 8 further comprises a film dispensing roller 81 and a first guide roller 82 mounted on the top of the platform 13 and a second guide roller 83 mounted at the lower end of the platform 13.

[0044] The protective film on the film dispensing roller 81 passes through the first guide roller 82, the right side of the second guide roller 83 and the left side of the top rolling cylinder 84 in sequence, and then passes through the top of the first tensioning cylinder 74 and the bottom of the second tensioning cylinder 75.

[0045] The lower end of the platform 13 is provided with a support 15 through the inclined support 14, and the mounting frame 76 is arranged below the platform 13.

[0046] Embodiment Three:

[0047] In this embodiment, as shown in Figure 3 , 4The top of the two groups of rotating frames 77 is connected by a connecting frame 771, so as to improve the stability of the connection of the two groups of rotating frames 77.

[0048] The outer side of the middle of the rotating frame 77 is fixed with a connecting shaft 774, the outer side end of one group of connecting shafts 774 is connected with a gear 775 through the side of the mounting frame 76.

[0049] The cylindrical rod 772 fixed at the two ends of the connecting frame 771 is extended through the arc-shaped through slot 17 of the side of the mounting frame 76, when the two groups of rotating frames 77 rotate around the connecting shaft 774, the arc-shaped through slot 17 is arranged to make the rotation of the two groups of rotating frames 77 more stable and not to shake.

[0050] The driving mechanism comprises a mounting plate 20 and a sliding rail 21 fixed at the side of the mounting frame 76, a rack 22 slidably connected at the top of the sliding rail 21, and a hydraulic cylinder 16 mounted on the mounting plate 20, the output end of the hydraulic cylinder 16 is connected to one end of the rack 22 through the mounting plate 20, and the gear 775 is engaged with the upper end of the rack 22.

[0051] When the piston rod of the output end of the hydraulic cylinder 16 extends, the rack 22 is pushed to move backward along the sliding rail 21, at this time, the rack 22 drives the gear 775 to drive the two groups of rotating frames 77 to rotate counterclockwise around the connecting shaft 774.

[0052] At this time, the second rolling cylinder 71 moves downward, the third rolling cylinder 73 moves upward, so that the second rolling cylinder 71 and the first rolling cylinder 72 roll the floor semi-finished product, and the third rolling cylinder 73 and the top rolling cylinder 84 roll the floor semi-finished product twice, at the same time, the top rolling cylinder 84 presses the protective film passing through the bottom thereof on the upper end surface of the floor semi-finished product.

[0053] When the piston rod of the output end of the hydraulic cylinder 16 retracts, the rack 22 is pushed to move forward along the sliding rail 21, at this time, the rack 22 drives the gear 775 to drive the two groups of rotating frames 77 to rotate clockwise around the connecting shaft 774.

[0054] At this time, the second rolling cylinder 71 moves upward, the third rolling cylinder 73 moves downward, so that the rolling distance between the second rolling cylinder 71 and the first rolling cylinder 72 becomes larger, and the rolling distance between the third rolling cylinder 73 and the top rolling cylinder 84 also becomes larger, so that the floor semi-finished product with different thicknesses can be rolled.

[0055] The second rolling cylinder 71 and the first rolling cylinder 72 roll the floor semi-finished product, and the third rolling cylinder 73 and the top rolling cylinder 84 roll the floor semi-finished product twice, so that through twice rolling, the efficiency of the rolling and shaping of the floor semi-finished product can be improved.

[0056] The gear 775 has a insertion hole 779 in the middle for inserting the connecting shaft 774, and slots 778 are provided on both sides of the insertion hole 779. The connecting shaft 774 has a locking block 777 that is locked in the corresponding slot 778, and a first spring 776 inside the slot 778 is connected to the side of the locking block 777.

[0057] When the second rolling cylinder 71 and the first rolling cylinder 72 roll the semi-finished flooring, and the third rolling cylinder 73 and the top rolling cylinder 84 roll the semi-finished flooring a second time, the semi-finished flooring has a downward reaction force on the second rolling cylinder 71 and an upward reaction force on the third rolling cylinder 73, which will cause the two sets of rotating frames 77 to have a tendency to rotate clockwise around the connecting shaft 774.

[0058] At this time, due to the setting of the first spring 776, the connecting shaft 774 rotates clockwise, so that the first spring 776 is in a compressed state, thereby avoiding the situation that the two sets of rotating frames 77 rotate clockwise with the connecting shaft 774 as the center. At this time, under the elastic force of the first spring 776, the second rolling cylinder 71 and the third rolling cylinder 73 can still roll on the upper and lower surfaces of the floor semi-finished product respectively. This can prevent the floor semi-finished product from getting stuck between the second rolling cylinder 71 and the first rolling cylinder 72 or between the third rolling cylinder 73 and the top rolling cylinder 84 during rolling.

[0059] When it is necessary to ensure that the thickness of the semi-finished floor after rolling is a fixed value a, it is only necessary to ensure that the rolling distance between the second rolling cylinder 71 and the first rolling cylinder 72 is slightly greater than the fixed value a, and the rolling distance between the third rolling cylinder 73 and the top rolling cylinder 84 is equal to the fixed value a, when the first spring 776 is in a fully compressed state.

[0060] Example 4:

[0061] In this embodiment, such as Figure 3 , 4 As shown in 5, 9 and 10, the rope mechanism includes a take-up wheel 773 fixed after the cylindrical rod 772 extends out of the arc-shaped through groove 17, a rope 18 connected to the take-up wheel 773, and a first guide wheel 19, a second guide wheel 23 and a limiting seat 25 installed on the side of the mounting frame 76.

[0062] The two ends of the second tensioning roller 75 are movably connected to the movable seats 78, which slide in the groove 24 inside the limiting seat 25. The rope 18 passes through the top of the first guide wheel 19 and the bottom of the second guide wheel 23 and extends into the limiting seat 25, and is fixedly connected to the front end of the movable seat 78.

[0063] The right end of the limiting seat 25 is fixed with a U-shaped seat 79 through a bolt 794, and the U-shaped seat 79 is also internally provided with a sliding groove 24, the middle part of the upper end and the lower end of the sliding groove 24 is provided with a limiting groove 793, the limiting protrusion 781 on the moving seat 78 is slidably connected to the limiting groove 793, and the right end of the limiting seat 25 penetrates a long screw rod 792, the left end of the long screw rod 792 extends into the inside of the limiting seat 25, is sleeved with a second spring 791 and is screwed to the middle part of the right end of the moving seat 78.

[0064] When the two groups of rotating frames 77 rotate counterclockwise with the connecting shaft 774 as the center, the winding wheels 773 pull the two groups of moving seats 78 to move forward along the sliding grooves 24 at the same time, so that the second tensioning roller 75 moves to the direction close to the first tensioning roller 74, thereby realizing tensioning of the floor semi-finished product after the film covering between the first tensioning roller 74 and the second tensioning roller 75, and ensuring that the floor semi-finished product after the film covering introduced through the calender 7 is in a flat state, avoiding wrinkles and the like.

[0065] Specifically, in use, the piston rod of the output end of the hydraulic cylinder 16 is retracted, the rack 22 is pushed to move forward along the sliding rail 21, at this time, the rack 22 drives the gear 775 to drive the two groups of rotating frames 77 to rotate clockwise with the connecting shaft 774 as the center through the connecting shaft 774;

[0066] The rolling distance between the second rolling cylinder 71 and the first rolling cylinder 72 becomes larger, and the rolling distance between the third rolling cylinder 73 and the top rolling cylinder 84 also becomes larger, and at the same time, under the elastic force of the second spring 791 on the long screw rod 792, the long screw rod 792 pulls the moving seat 78 to move backward, thereby increasing the distance between the first tensioning roller 74 and the second tensioning roller 75, which is convenient for the subsequent passing of the floor semi-finished product;

[0067] The floor semi-finished product extruded through the mold 6 passes through the second rolling cylinder 71 and the first rolling cylinder 72, and then passes through the third rolling cylinder 73 and the top rolling cylinder 84, and then the floor semi-finished product and the protective film pass through the first tensioning roller 74 and the second tensioning roller 75, and then enter the cooling and shaping table 9, the traction machine 10 and the cutting machine 11 in sequence, and then under the traction of the traction machine 10 on the floor semi-finished product and the protective film, the floor semi-finished product and the protective film move backward together;

[0068] Then, the piston rod of the output end of the hydraulic cylinder 16 is extended, the rack 22 is pushed to move backward along the sliding rail 21, at this time, the rack 22 drives the gear 775 to drive the two groups of rotating frames 77 to rotate counterclockwise with the connecting shaft 774 as the center through the connecting shaft 774;

[0069] At this time, the second rolling cylinder 71 moves downward, and the third rolling cylinder 73 moves upward, so that the second rolling cylinder 71 and the first rolling cylinder 72 roll the floor semi-product, and the third rolling cylinder 73 and the top rolling cylinder 84 roll the floor semi-product again, and meanwhile, the top rolling cylinder 84 presses the protective film at the bottom thereof onto the upper end surface of the floor semi-product;

[0070] The second rolling cylinder 71 and the first rolling cylinder 72 roll the floor semi-product, and the third rolling cylinder 73 and the top rolling cylinder 84 roll the floor semi-product again, so that the efficiency of rolling and shaping the floor semi-product can be improved through twice rolling.

[0071] Meanwhile, the winding wheel 773 pulls the two groups of moving seats 78 along the grooves 24 to move forward simultaneously through the rope 18, so that the second tensioning cylinder 75 moves to the direction close to the first tensioning cylinder 74, thereby realizing tensioning of the floor semi-product with the film after passing between the first tensioning cylinder 74 and the second tensioning cylinder 75, which can ensure that the floor semi-product with the film after being led out of the calender 7 is in a flat state, avoiding wrinkles and the like.

[0072] The floor semi-product with the film after being cooled and shaped is cut by the cutting machine 11 after cooling and shaping, and the co-extrusion floor is formed, and under the conveying action of the plate conveying machine 12, the co-extrusion floor is stacked on the tray.

[0073] The drying machine 1, the extruder 5, the cooling and shaping table 9, the traction machine 10, the cutting machine 11 and the plate conveying machine 12 have wide application in the production equipment field of the co-extrusion floor, and belong to the prior art, and the specific models and structures thereof are not described in detail.

[0074] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A co-extruded flooring production line comprising a film depositor and a calender located below the film depositor, characterized in that: The film placing machine is used for placing protective film, and the protective film is pressed on the upper end surface of the floor semi-finished product under the extrusion and plastic shaping of the calender on the floor semi-finished product; The calender comprises a mounting frame, a first rolling cylinder movably mounted on the front side inside the mounting frame, a first tensioning roller movably mounted on the right side inside the mounting frame, a second tensioning roller mounted on the rear end of the mounting frame, and two groups of rotating frames movably mounted on the front side above the mounting frame; The film placing machine comprises a top rolling cylinder mounted on the top of the mounting frame, a second rolling cylinder movably mounted above the first rolling cylinder and a third rolling cylinder movably mounted below the top rolling cylinder between the two groups of rotating frames, and the two sides of the rotating frame are connected to the two ends of the second tensioning roller through a rope mechanism; The rotating frame rotates under the driving of the driving mechanism, so as to adjust the rolling distance between the second rolling cylinder and the first rolling cylinder and the rolling distance between the third rolling cylinder and the top rolling cylinder, and simultaneously pull the second tensioning roller to move horizontally towards the first tensioning roller through the rope mechanism; The top portions of the two groups of rotating frames are connected through a connecting frame, and the cylindrical rods fixed at the two ends of the connecting frame extend out through the arc-shaped through grooves on the side edges of the mounting frame; The connecting shafts are fixed on the outer sides of the middle portions of the rotating frames, and the outer side ends of one group of connecting shafts extend through the side edges of the mounting frame and are connected with the gears behind; The driving mechanism comprises mounting plates and slide rails fixed on the side edges of the mounting frame, and a rack slidably connected on the top of the slide rail, and a hydraulic cylinder mounted on the mounting plate, and the output end of the hydraulic cylinder extends through the mounting plate and is connected to one end of the rack, and the gear is engaged on the upper end of the rack; The rope mechanism comprises winding wheels fixed after the cylindrical rods extend out of the arc-shaped through grooves, ropes connected on the winding wheels, and first guide wheels, second guide wheels and limiting seats mounted on the side edges of the mounting frame; The two ends of the second tensioning roller are movably connected with moving seats which are slidably connected in the slide grooves inside the limiting seats, and the ropes extend into the limiting seats through the first guide wheels on the top and the second guide wheels on the bottom, and are fixedly connected to the front ends of the moving seats; The middle portion of the gear is provided with an insertion hole for inserting the connecting shaft, and the two sides of the insertion hole are provided with clamping grooves, the connecting shaft is provided with a clamping block clamped in the corresponding clamping groove, and the first spring inside the clamping groove is connected to the side edge of the clamping block; The right end of the limiting seat is fixed with a U-shaped seat through bolts, and the limiting seat is also provided with a slide groove inside, and the limiting grooves are arranged on the middle portions of the upper and lower ends of the slide groove, and the limiting protrusions on the moving seat are slidably connected in the limiting grooves, and the long screw rod extends through the right end of the limiting seat, and the left end of the long screw rod extends into the limiting seat, and the second spring is sleeved on the left end of the long screw rod and is screwed on the right end of the moving seat.

2. A co-extrusion flooring line according to claim 1, characterized in that: The film placing machine further comprises a film placing roller and first guide rollers mounted on the top of the platform, and a second guide roller mounted on the lower end of the platform; The protective film on the film placing roller passes through the first guide roller, the right side and the top of the second guide roller, the left side of the top rolling cylinder, the top of the first tensioning roller and the bottom of the second tensioning roller in sequence.

3. A co-extrusion flooring line according to claim 2, characterized in that: The lower end of the platform is provided with a support through a diagonal brace, and the mounting frame is arranged below the platform.

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