Environment-friendly sofa leather production equipment and production method based on negundo chastetree bark tannin extract

Abstract

The environment-friendly sofa leather production equipment comprises an adjusting frame, stand columns and a flattening mechanism, the stand columns are installed on the periphery of the bottom side of the adjusting frame, the flattening mechanism is installed below the adjusting frame, and a U-shaped sliding frame with a downward opening is installed on the adjusting frame in a sliding mode; a material moving plate is movably mounted in the U-shaped sliding frame; when the leather crust is located on the flattening mechanism, a lifting disc moving in a lifting mode adsorbs and fixes the leather crust through suction holes, then a third motor works, through cooperation of a gear ring, rotating teeth, a worm and a worm wheel, all first conveying wheels and second conveying wheels rotate at the same speed, and the first conveying wheels and the second conveying wheels are distributed in a circle; and the first conveying wheels and the second conveying wheels are arranged in a staggered manner, so that different parts of the leather blank are driven by the conveying wheels to move in different directions, the leather blank is automatically unfolded and flattened conveniently and quickly, and the processing efficiency of the sofa leather is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of sofa leather processing, and in particular to environmentally friendly sofa leather production equipment and a production method based on wattle bark tannin extract. Background Art

[0002] Sofa leather is the main raw material for making genuine leather sofas. There are many raw materials for making the surface of sofas, including genuine leather sofa leather, PU sofa leather, PVC upper leather, etc. During the processing of sofa leather, it is modified step by step through quebracho tannin extract and wattle bark tannin extract, which reduces the chromium content of wastewater in the preparation process of sofa leather and achieves environmentally friendly processing.

[0003] When processing genuine leather sofa leather, since the base material is mostly cowhide, and most cowhide is not of standard, it is necessary to manually spread the cowhide on the processing equipment during flattening and grinding. Otherwise, it will cause quality problems for the sofa leather after flattening and grinding. Therefore, during the flattening and spreading process, multiple workers are required to constantly move and adjust the equipment, resulting in low flattening and spreading efficiency and increased production costs. Summary of the invention

[0004] The problem solved by the present invention is to provide an environmentally friendly sofa leather production equipment and production method based on wattle bark tannin extract, which solves the problem that when processing genuine leather sofa leather, since the base material is mostly cowhide, and the cowhide is mostly irregular, it is necessary to manually spread the cowhide on the processing equipment during flattening and grinding, otherwise it will cause quality problems in the sofa leather after flattening and grinding. Therefore, during the flattening and spreading process, multiple workers are required to constantly move and adjust the equipment, resulting in low flattening and spreading efficiency and increased production costs. Technical problems.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An environmentally friendly sofa leather production device based on wattle bark tannin extract comprises an adjustment frame, columns and a paving mechanism, wherein columns are installed around the bottom side of the adjustment frame, a paving mechanism is installed below the adjustment frame, a U-shaped slide with an opening facing downward is slidably installed on the adjustment frame, a material shifting plate is movably installed in the U-shaped slide, a support plate is installed on the adjustment frame, and a lifting suction plate is movably installed on the bottom side of the support plate;

[0007] The paving mechanism includes a machine base, a plurality of first wheel grooves and second wheel grooves are provided on the machine base, a first conveying wheel is installed in the first wheel groove, and a second conveying wheel is installed in the second wheel groove, a plurality of the first wheel grooves and the second wheel grooves are distributed on the machine base at equal angles in a circle, a plurality of the first wheel grooves in a circle are located outside a plurality of the second wheel grooves in a circle, and the first wheel grooves and the second wheel grooves are staggered, a lifting plate is installed in the middle of the machine base, and a plurality of suction holes are provided on the lifting plate.

[0008] Preferably, a first motor is installed on the side wall of the adjusting frame, a first rotating shaft is installed at the output end of the first motor located in the adjusting frame, and first conical teeth are installed at both ends of the first rotating shaft.

[0009] Preferably, two first threaded rods are installed horizontally and in parallel in the adjustment frame, and the first threaded rods are threadedly connected to the U-shaped slide, and second conical teeth meshing with the first conical teeth are installed at the ends of the first threaded rods.

[0010] Preferably, a second motor is installed on the U-shaped slide, and a second rotating shaft is installed on the output end of the second motor located in the U-shaped slide, and third conical teeth are installed on both ends of the second rotating shaft.

[0011] Preferably, both ends of the U-shaped slide are provided with lifting grooves, a second threaded rod is vertically installed in the lifting groove, and the second threaded rod is threadedly connected to the material moving plate, and the top of the two second threaded rods are both provided with fourth conical teeth meshing with the third conical teeth, and the material moving plate is provided with plate grooves corresponding to the first wheel groove, the second wheel groove and the lifting plate.

[0012] Preferably, a first pneumatic cylinder is installed on the support plate, and the telescopic end of the first pneumatic cylinder is connected to the lifting suction plate, and a plurality of suction cups are installed on the bottom side of the lifting suction plate.

[0013] Preferably, a third motor is installed on the bottom side of the base, a turntable is installed inside the base at the output end of the third motor, a first gear ring is installed outside the top side of the turntable, and a second gear ring is installed inside the top side of the turntable, and the first gear ring and the second gear ring have the same number of teeth.

[0014] Preferably, a plurality of first rotating teeth with equal angles are meshed and installed in the first gear ring, a plurality of second rotating teeth with equal angles are meshed and installed in the second gear ring, and the number of teeth of the first rotating teeth and the second rotating teeth are the same, a transmission shaft is installed on the first rotating teeth and the second rotating teeth, the transmission shaft is connected to the machine base bearing, and a worm is installed on the transmission shaft, the worm is meshed and installed with the worm wheel, and the worm wheel is connected to the first conveying wheel and the second conveying wheel through a connecting shaft.

[0015] Preferably, a second pneumatic cylinder is installed in the machine base, and the telescopic end of the second pneumatic cylinder is connected to the lifting plate.

[0016] A method for producing environmentally friendly sofa leather based on wattle bark tannin extract, the specific operating steps of the method are as follows:

[0017] Step 1: Lay the leather on a through-type water squeezer to squeeze out water, dry the leather through a drying device, apply a repairing agent to the leather, grind the leather through a leather grinding machine, size the leather through a roller coating device, perform step-by-step modification of quebracho tannin and wattle bark tannin before dyeing, dye the leather through a dyeing device to obtain leather, emboss or print the leather, and hot-press the leather at high temperature to obtain a finished sofa leather, which is used for transportation and flattening in the leather production process through production equipment;

[0018] Step 2: The first motor drives the first rotating shaft to rotate, and the meshing transmission of the first conical gear and the second conical gear realizes the rotation of the first threaded rod, which drives the threaded U-shaped slide to translate, and the second motor drives the second rotating shaft to rotate, and the meshing transmission of the third conical gear and the fourth conical gear realizes the rotation of the second threaded rod, which drives the threaded shifting plate to move. First, the shifting plate is located at one end of the adjustment frame. At this time, the operator places the leather blank in the center on the shifting plate, and then moves the shifting plate to the paving mechanism, and the first conveying wheel and the second conveying wheel are aligned with the bottom of the leather blank. The second pneumatic cylinder drives the lifting plate to move upward, and under the action of the air pump, the suction hole is adsorbed and fixed to the bottom side of the leather blank, and the third motor is driven to rotate the turntable. At this time, the first gear ring and the second gear ring rotate synchronously, driving the meshing first and second gears to rotate, and the first and second gears have the same rotation speed. The transmission shaft on the gear drives the worm to rotate, meshing with the worm gear, and drives the first conveying wheel and the second conveying wheel connected to the connecting shaft to rotate. At this time, the circularly distributed conveying wheels drive the leather blank to unfold and flatten in different directions, and then the third motor stops working, and the suction holes and the leather blank stop adsorbing;

[0019] Step 3: At this time, the material transfer plate drives the leather blank to move under the lifting suction plate, the leather blank and the suction cup of the lifting suction plate are adsorbed, the material transfer plate moves back to the initial position, and the lifting suction plate is driven to move by the extension of the first pneumatic cylinder, and the flattened leather blank is placed on the conveyor belt for transfer processing.

[0020] The beneficial effects of the present invention are as follows: when the leather blank is located on the flattening mechanism, the lifting plate that moves upward and downward at this time absorbs and fixes the leather blank through the suction hole, and then the third motor works, and through the cooperation of the gear ring and the rotating gear as well as the worm and the worm gear, all the first conveying wheels and the second conveying wheels rotate at the same speed, the first conveying wheels and the second conveying wheels are distributed in a circle, and the first conveying wheels and the second conveying wheels are staggered, so different parts of the leather blank are driven by the conveying wheels to move in different directions respectively, so that the leather blank is automatically unfolded and flattened, which is convenient and quick, and greatly improves the processing efficiency of sofa leather;

[0021] At the same time, the lifting and translation of the material transfer plate facilitates the transportation of the leather blanks, and the cooperation of the lifting suction plate facilitates the loading operation of the unfolded and flattened leather blanks. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the first structure of the present invention as a whole;

[0023] Figure 2 It is a schematic diagram of the second structure of the present invention as a whole;

[0024] Figure 3 The schematic diagram of the structure of the paving mechanism of the present invention is provided;

[0025] Figure 4 It is a partial cross-sectional view of the whole of the present invention;

[0026] Figure 5 It is a cross-sectional view of the U-shaped slide of the present invention;

[0027] Figure 6 This is a schematic diagram of the installation structure of the first gear ring and the second gear ring of the present invention;

[0028] Figure 7 This is a schematic diagram of the installation structure of the first rotating gear and the second rotating gear of the present invention;

[0029] Figure 8 It is a schematic diagram of the installation structure of the worm and worm wheel of the present invention.

[0030] Legend:

[0031] 1. Adjustment frame; 2. Column; 3. Paving mechanism; 4. U-shaped slide; 5. Material transfer plate; 6. Support plate; 7. Lifting suction plate; 8. Machine base; 9. First wheel groove; 10. First conveying wheel; 11. Second wheel groove; 12. Second conveying wheel; 13. Lifting plate; 14. Suction hole; 15. First motor; 16. First rotating shaft; 17. First conical tooth; 18. Second conical tooth; 19. First threaded rod; 20. Second motor machine; 21, second rotating shaft; 22, third conical tooth; 23, fourth conical tooth; 24, lifting groove; 25, second threaded rod; 26, plate groove; 27, first pneumatic cylinder; 28, suction cup; 29, third motor; 30, turntable; 31, first gear ring; 32, first rotating tooth; 33, second gear ring; 34, second rotating tooth; 35, transmission shaft; 36, worm; 37, worm wheel; 38, connecting shaft; 39, second pneumatic cylinder. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Specific examples are given below.

[0034] See also Figures 1 to 8 , an environmentally friendly sofa leather production equipment based on wattle bark tannin extract, comprising an adjusting frame 1, a column 2 and a paving mechanism 3, the adjusting frame 1 is provided with columns 2 all around the bottom side, the paving mechanism 3 is provided below the adjusting frame 1, a U-shaped slide 4 with an opening facing downward is slidably provided on the adjusting frame 1, a material shifting plate 5 is movably provided in the U-shaped slide 4, a supporting plate 6 is provided on the adjusting frame 1, and a lifting suction plate 7 is movably provided on the bottom side of the supporting plate 6;

[0035] A first motor 15 is installed on the side wall of the adjustment frame 1. The output end of the first motor 15 is located in the adjustment frame 1 and a first rotating shaft 16 is installed. Both ends of the first rotating shaft 16 are installed with first conical teeth 17. Two first threaded rods 19 are installed horizontally and parallelly in the adjustment frame 1. The first threaded rods 19 are threadedly connected to the U-shaped slide 4. The ends of the first threaded rods 19 are installed with second conical teeth 18 meshing with the first conical teeth 17. The first rotating shaft 16 is driven to rotate by the operation of the first motor 15. The meshing transmission of the first conical teeth 17 and the second conical teeth 18 realizes the rotation of the first threaded rod 19, drives the threadedly connected U-shaped slide 4 to translate, and realizes the horizontal movement of the U-shaped slide 4.

[0036] A second motor 20 is installed on the U-shaped slide 4, and the output end of the second motor 20 is located in the U-shaped slide 4 and a second rotating shaft 21 is installed. Third conical teeth 22 are installed at both ends of the second rotating shaft 21, and lifting grooves 24 are provided at both ends of the U-shaped slide 4. A second threaded rod 25 is vertically installed in the lifting groove 24, and the second threaded rod 25 is threadedly connected to the material moving plate 5. The tops of the two second threaded rods 25 are both equipped with fourth conical teeth 23 meshing with the third conical teeth 22. The material moving plate 5 is provided with plate grooves 26 corresponding to the first wheel groove 9, the second wheel groove 11 and the lifting disk 13. The second motor 20 drives the second rotating shaft 21 to rotate, and the meshing transmission of the third conical teeth 22 and the fourth conical teeth 23 is used to realize the rotation of the second threaded rod 25, so as to drive the threadedly connected material moving plate 5 to move, so as to realize the lifting and lowering movement of the material moving plate 5, and the plate grooves 26 on the material moving plate 5 facilitate the contact between the leather embryo and the conveying wheel and the lifting disk 13.

[0037] A first pneumatic cylinder 27 is installed on the support plate 6, and the telescopic end of the first pneumatic cylinder 27 is connected to the lifting suction plate 7, and a plurality of suction cups 28 are installed on the bottom side of the lifting suction plate 7. The suction cups 28 of the leather blank and the lifting suction plate 7 are adsorbed and fixed under the action of the air pump, and the material transfer plate 5 moves back to the initial position, and the lifting suction plate 7 is moved by the telescopic movement of the first pneumatic cylinder 27, and the flattened and unfolded leather blank is placed on the conveyor belt for transfer processing.

[0038] The paving mechanism 3 includes a machine base 8, on which a plurality of first wheel grooves 9 and second wheel grooves 11 are provided, and a first conveying wheel 10 is installed in the first wheel groove 9, and a second conveying wheel 12 is installed in the second wheel groove 11, and a plurality of first wheel grooves 9 and second wheel grooves 11 are distributed on the machine base 8 at equal angles in a circular shape, and a plurality of first wheel grooves 9 in a circular shape are located outside a plurality of second wheel grooves 11 in a circular shape, and the first wheel grooves 9 and the second wheel grooves 11 are arranged alternately, and a lifting plate 13 is installed in the middle of the machine base 8, and a lifting plate 13 is provided with a plurality of first wheel grooves 9 and a plurality of second wheel grooves 11 in a circular shape. A plurality of suction holes 14 are provided, a third motor 29 is installed on the bottom side of the machine base 8, a turntable 30 is installed inside the machine base 8 at the output end of the third motor 29, a first gear ring 31 is installed on the outside of the top side of the turntable 30, and a second gear ring 33 is installed on the inside of the top side of the turntable 30, and the first gear ring 31 and the second gear ring 33 have the same number of teeth, a plurality of first rotating teeth 32 with equal angles are meshed and installed in the first gear ring 31, a plurality of second rotating teeth 34 with equal angles are meshed and installed in the second gear ring 33, and the first rotating teeth 32 and The second rotating teeth 34 have the same number of teeth. A transmission shaft 35 is installed on the first rotating teeth 32 and the second rotating teeth 34. The transmission shaft 35 is connected to the bearing of the machine base 8, and a worm 36 is installed on the transmission shaft 35. The worm 36 is meshed with a worm wheel 37. The worm wheel 37 is connected to the first conveying wheel 10 and the second conveying wheel 12 through a connecting shaft 38. The third motor 29 drives the turntable 30 to rotate. At this time, the first gear ring 31 and the second gear ring 33 rotate synchronously, driving the meshed first rotating teeth 32 and the second rotating teeth 34 to rotate, and the first The rotating gear 32 and the second rotating gear 34 have the same rotation speed. The transmission shaft 35 on the rotating gear drives the worm 36 to rotate, meshing with the worm wheel 37 for transmission, driving the first conveying wheel 10 and the second conveying wheel 12 connected to the connecting shaft 38 to rotate. At this time, the circularly distributed conveying wheels drive the leather blank to be spread out and flattened in different directions. A second pneumatic cylinder 39 is installed in the machine base 8, and the telescopic end of the second pneumatic cylinder 39 is connected to the lifting plate 13. The second pneumatic cylinder 39 drives the lifting plate 13 to move upward. Under the action of the air pump, the suction hole 14 is adsorbed and fixed to the bottom side of the leather blank.

[0039] A method for producing environmentally friendly sofa leather based on wattle bark tannin extract, the specific operating steps of the method are as follows:

[0040] Step 1: Lay the leather on a through-type water squeezer to squeeze out water, dry the leather through a drying device, apply a repairing agent to the leather, grind the leather through a leather grinding machine, size the leather through a roller coating device, perform step-by-step modification of quebracho tannin and wattle bark tannin before dyeing, dye the leather through a dyeing device to obtain leather, emboss or print the leather, and hot-press the leather at high temperature to obtain a finished sofa leather, which is used for transportation and flattening in the leather production process through production equipment;

[0041] Step 2: The first motor 15 drives the first rotating shaft 16 to rotate, and the meshing transmission of the first conical teeth 17 and the second conical teeth 18 realizes the rotation of the first threaded rod 19, driving the threaded U-shaped slide 4 to translate, and the second motor 20 drives the second rotating shaft 21 to rotate, and the meshing transmission of the third conical teeth 22 and the fourth conical teeth 23 realizes the rotation of the second threaded rod 25, driving the threaded moving plate 5 to move. First, the moving plate 5 is located at one end of the adjustment frame 1. At this time, the operator places the leather blank in the center on the moving plate 5, and then the moving plate 5 moves to the flattening mechanism 3, and the first conveying wheel 10 and the second conveying wheel 12 are in contact with the bottom side of the leather blank. The second pneumatic cylinder 39 drives the lifting plate 13 to move upward. Under the action of the air pump, the suction hole 14 is fixed to the bottom side of the leather blank by adsorption. The third motor 29 drives the turntable 30 to rotate. At this time, the first gear ring 31 and the second gear ring 33 rotate synchronously, driving the meshing first rotating tooth 32 and the second rotating tooth 34 to rotate, and the first rotating tooth 32 and the second rotating tooth 34 have the same rotation speed. The transmission shaft 35 on the rotating tooth drives the worm 36 to rotate, meshing with the worm wheel 37 for transmission, and drives the first conveying wheel 10 and the second conveying wheel 12 connected to the connecting shaft 38 to rotate. At this time, the circularly distributed conveying wheels drive the leather blank to unfold and pave in different directions, and then the third motor 29 stops working, and the suction hole 14 and the leather blank stop adsorbing;

[0042] Step three: At this time, the material moving plate 5 drives the leather blank to move to the bottom of the lifting suction plate 7, the leather blank and the suction cup 28 of the lifting suction plate 7 are adsorbed, the material moving plate 5 moves back to the initial position, and the lifting suction plate 7 is driven to move by the extension and contraction of the first pneumatic cylinder 27, and the flattened and unfolded leather blank is placed on the conveyor belt for transfer processing.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An environmentally friendly sofa leather production equipment based on wattle bark tannin extract, characterized in that: The utility model comprises an adjusting frame (1), a column (2) and a paving mechanism (3), wherein the adjusting frame (1) is provided with columns (2) on all sides of the bottom side, the paving mechanism (3) is provided below the adjusting frame (1), a U-shaped slide (4) with an opening facing downward is slidably provided on the adjusting frame (1), a material shifting plate (5) is movably provided in the U-shaped slide (4), a supporting plate (6) is provided on the adjusting frame (1), and a lifting suction plate (7) is movably provided on the bottom side of the supporting plate (6); The paving mechanism (3) comprises a machine base (8), the machine base (8) is provided with a plurality of first wheel grooves (9) and second wheel grooves (11), a first conveying wheel (10) is installed in the first wheel groove (9), and a second conveying wheel (12) is installed in the second wheel groove (11), the plurality of first wheel grooves (9) and second wheel grooves (11) are distributed on the machine base (8) in a circular shape at equal angles, the plurality of circular first wheel grooves (9) are located outside the plurality of circular second wheel grooves (11), and the first wheel grooves (9) and second wheel grooves (11) are arranged in an alternating manner, a lifting plate (13) is installed in the middle of the machine base (8), and the lifting plate (13) is provided with a plurality of suction holes (14).

2. The environmentally friendly sofa leather production equipment based on wattle bark tannin extract according to claim 1 is characterized in that: A first motor (15) is installed on the side wall of the adjustment frame (1); a first rotating shaft (16) is installed at the output end of the first motor (15) located inside the adjustment frame (1); and first conical teeth (17) are installed at both ends of the first rotating shaft (16).

3. The environmentally friendly sofa leather production equipment based on wattle bark tannin extract according to claim 2 is characterized in that: Two first threaded rods (19) are installed horizontally and in parallel in the adjustment frame (1), and the first threaded rods (19) are threadedly connected to the U-shaped slide (4), and second tapered teeth (18) meshing with the first tapered teeth (17) are installed at the ends of the first threaded rods (19).

4. The environmentally friendly sofa leather production equipment based on wattle bark tannin extract according to claim 3 is characterized in that: A second motor (20) is mounted on the U-shaped slide (4); an output end of the second motor (20) is located inside the U-shaped slide (4); a second rotating shaft (21) is mounted therein; and third conical teeth (22) are mounted on both ends of the second rotating shaft (21).

5. The environmentally friendly sofa leather production equipment based on wattle bark tannin extract according to claim 4 is characterized in that: Both ends of the U-shaped slide (4) are provided with lifting grooves (24), a second threaded rod (25) is vertically installed in the lifting groove (24), and the second threaded rod (25) is threadedly connected to the material transfer plate (5), and the top ends of the two second threaded rods (25) are both provided with fourth conical teeth (23) meshing with the third conical teeth (22), and the material transfer plate (5) is provided with plate grooves (26) corresponding to the first wheel groove (9), the second wheel groove (11) and the lifting plate (13).

6. The environmentally friendly sofa leather production equipment based on wattle bark tannin extract according to claim 5 is characterized in that: A first pneumatic cylinder (27) is installed on the support plate (6), and the telescopic end of the first pneumatic cylinder (27) is connected to the lifting suction plate (7), and a plurality of suction cups (28) are installed on the bottom side of the lifting suction plate (7).

7. The environmentally friendly sofa leather production equipment based on wattle bark tannin extract according to claim 6 is characterized in that: A third motor (29) is installed on the bottom side of the machine base (8); an output end of the third motor (29) is located inside the machine base (8); a turntable (30) is installed inside the machine base (8); a first gear ring (31) is installed outside the top side of the turntable (30); and a second gear ring (33) is installed inside the top side of the turntable (30); and the first gear ring (31) and the second gear ring (33) have the same number of teeth.

8. The environmentally friendly sofa leather production equipment based on wattle bark tannin extract according to claim 7 is characterized in that: The first gear ring (31) is meshed with a plurality of first rotating teeth (32) distributed at equal angles, the second gear ring (33) is meshed with a plurality of second rotating teeth (34) distributed at equal angles, and the first rotating teeth (32) and the second rotating teeth (34) have the same number of teeth. A transmission shaft (35) is mounted on the first rotating teeth (32) and the second rotating teeth (34), the transmission shaft (35) is connected to a bearing of a machine base (8), and a worm (36) is mounted on the transmission shaft (35), the worm (36) is meshed with a worm wheel (37), and the worm wheel (37) is connected to the first conveying wheel (10) and the second conveying wheel (12) via a connecting shaft (38).

9. The environmentally friendly sofa leather production equipment based on wattle bark tannin extract according to claim 8, characterized in that: A second pneumatic cylinder (39) is installed in the machine base (8), and a telescopic end of the second pneumatic cylinder (39) is connected to the lifting plate (13).

10. A method for producing environmentally friendly sofa leather based on wattle bark tannin extract, characterized in that: The specific steps of this method are as follows: Step 1: Lay the leather on a through-type water squeezer to squeeze out water, dry the leather through a drying device, apply a repairing agent to the leather, grind the leather through a leather grinding machine, size the leather through a roller coating device, perform step-by-step modification of quebracho tannin and wattle bark tannin before dyeing, dye the leather through a dyeing device to obtain leather, emboss or print the leather, and hot-press the leather at high temperature to obtain a finished sofa leather, which is used for transportation and flattening in the leather production process through the production equipment described in claims 1-9; Step 2: The first motor (15) drives the first rotating shaft (16) to rotate, and the first conical teeth (17) and the second conical teeth (18) are meshed to drive the first threaded rod (19) to rotate, thereby driving the threaded U-shaped slide (4) to translate, and the second motor (20) drives the second rotating shaft (21) to rotate, and the third conical teeth (22) and the fourth conical teeth (23) are meshed to drive the second threaded rod (25) to rotate, thereby driving the threaded material moving plate (5) to move. First, the material moving plate (5) is located at one end of the adjustment frame (1). At this time, the operator places the leather blank in the center on the material moving plate (5), and then the material moving plate (5) is moved to the flattening mechanism (3), and the first conveying wheel (10) and the second conveying wheel (12) are in contact with the bottom side of the leather blank. The second pneumatic cylinder (39) drives the lifting plate (13) to move upward. Under the action of the air pump, the suction hole (14) is fixed to the bottom side of the leather blank by suction. The third motor (29) drives the rotating plate (30) to rotate. At this time, the first gear ring (31) and the second gear ring (33) rotate synchronously, driving the meshing first rotating tooth (32) and the second rotating tooth (34) to rotate, and the first rotating tooth (32) and the second rotating tooth (34) rotate at the same speed. The transmission shaft (35) on the rotating tooth drives the worm (36) to rotate, meshing with the worm wheel (37) for transmission, and drives the first conveying wheel (10) and the second conveying wheel (12) connected to the connecting shaft (38) to rotate. At this time, the conveying wheels distributed in a circular shape drive the leather blank to be spread out and laid flat in different directions. Then the third motor (29) stops working, and the suction hole (14) and the leather blank stop being adsorbed. Step 3: At this time, the material transfer plate (5) drives the leather blank to move below the lifting suction plate (7), the leather blank and the suction cup (28) of the lifting suction plate (7) are adsorbed, the material transfer plate (5) moves back to the initial position, and the lifting suction plate (7) is driven to move by the first pneumatic cylinder (27) to place the flattened leather blank on the conveyor belt for transfer processing.

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