Leather stretching and flattening device

Abstract

The utility model discloses a leather stretching and flattening device, which relates to the field of leather stretching, and comprises an operation table, a shell, a feed port and a discharge port, the inner wall of the shell is rotatably provided with an extrusion roller for stretching leather, and the inner wall of the shell is provided with a preheating assembly for preheating the leather; the preheating assembly and the stretching assembly are arranged, leather is preheated, the initial temperature of the leather can be increased, the leather is closer to the temperature when water vapor is heated, thermal stress caused by temperature difference when the water vapor is introduced can be reduced, and therefore the stress accumulation and deformation risk in the leather are reduced; and proper pressure is applied to the leather through the extrusion rollers, so that the leather extends in the specific direction, the ductility of the leather can be improved, the leather can adapt to shape change more easily when subjected to external force, and the use performance of the leather is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the field of leather stretching, in particular to a leather stretching and flattening device. Background Art

[0002] According to the search of Chinese patent CN219772148U, a leather stretching and leveling device for water-based leather production is disclosed, which relates to the technical field of leather processing and production, including a lower shell, a stretching unit, a shaping unit and a spray unit; an upper shell is arranged on the upper end of the lower shell; the stretching unit comprises a slide rail 1, a slider 1, a connecting beam 1, a sliding beam 1, a support frame, a connecting beam 2, a sliding beam 2, a fixed plate, a pressure plate, a bolt 1 and a stretching power assembly, and two slide rails 1 are longitudinally arranged at the inner bottom end of the lower shell, and the two slide rails 1 are respectively slidably connected to the corresponding slider 1, and the upper end faces of the two sliders 1 are fixedly connected to the lower end face of the connecting beam 1, and a sliding bar is transversely arranged at the upper end of the connecting beam 1, and a sliding beam 1 is arranged at the upper end of the connecting beam 1, and the bottom cross-sliding groove of the sliding beam 1 is slidably connected to the sliding bar. The leather stretching and leveling device for water-based leather production not only has good stretching effect and high stretching efficiency, but can also be applied to leathers of various sizes;

[0003] This patent uses a shaping unit and a spraying unit. First, hot water vapor is sprayed on the leather through a nozzle to soften the leather, and then a pressure roller is used to roll the leather. This can not only make the leather stretched more flat, but also greatly reduce the lifting and lowering required during the stretching process. When the leather is sprayed with water vapor and the humidity is high, the leather absorbs water vapor faster, causing the leather to expand rapidly. If the heating speed cannot match it, excessive stress may be generated inside the leather, causing deformation or wrinkles on the surface.

[0004] Therefore, it is necessary to propose a leather stretching and flattening device to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a leather stretching and smoothing device to solve the above-mentioned problem that when the humidity is high after the leather is sprayed with water vapor, the speed at which the leather absorbs water vapor will be accelerated, causing the leather to expand rapidly. If the heating speed cannot match it, excessive stress may be generated inside the leather, causing deformation or wrinkles on the surface.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a leather stretching and flattening device, comprising an operating table, a shell, a feed port and a discharge port, the inner wall of the shell is rotatably provided with a squeezing roller for stretching the leather, and the inner wall of the shell is provided with a preheating component for preheating the leather;

[0007] The preheating assembly includes a fixing rod, an extrusion sheet, an air vent, a heating sheet and an exhaust hole, wherein the fixing rod is arranged on the inner wall of the shell, the extrusion sheet is arranged at one end of the fixing rod close to the operating table, the air vents are equidistantly arranged on the surface of the extrusion sheet, the heating sheet is equidistantly arranged on the surface of the extrusion sheet and located between the air vents, and the exhaust hole is arranged on the surface of the shell.

[0008] Preferably, a stretching assembly for adjusting the squeezing roller is provided on the shell, and the stretching assembly includes a first rotating rod, a second rotating rod, a sliding groove, a fixing part, a fixing frame, a limiting hole, a sliding hole, a sliding plate, a limiting rod, a spring, a driving pulley, a driven pulley, a synchronous belt and a motor, the first rotating rod is rotatably arranged on the inner wall of the shell through a bearing, the squeezing roller is arranged on the surface of the first rotating rod, the second rotating rod is rotatably arranged on one side of the shell through a bearing, and the sliding groove is opened on both sides of the shell.

[0009] Preferably, the fixing piece is arranged at an end of the first rotating rod away from the second rotating rod, the fixing frame is arranged at a side of the fixing piece away from the first rotating rod, the limiting holes are equidistantly opened on a side of the shell close to the fixing frame, the sliding hole is arranged on the surface of the fixing piece, the sliding plate is slidably arranged on the inner wall of the fixing frame, the limiting rod is arranged on the sliding plate, the limiting rod passes through the sliding hole and is plugged into the limiting groove, the spring is arranged on the sliding plate, one end of the spring is fixed to the fixing frame, the driving pulley is arranged at an end of the second rotating rod away from the shell, the driven pulley is arranged at an end of the first rotating rod away from the fixing frame, the driving pulley and the driven pulley are rotated by a synchronous belt, and the motor is arranged on a side of the shell close to the driving pulley, and the output end of the motor is fixed to the driving pulley.

[0010] Preferably, two sides of the extrusion sheet are arranged in an arc shape.

[0011] Preferably, a pull ring is provided on a side of the sliding plate away from the limiting rod.

[0012] Technical effects and advantages of the utility model:

[0013] 1. A preheating component is provided. By preheating the leather, the initial temperature of the leather will increase, making it closer to the temperature when heated by water vapor. This helps to reduce the thermal stress caused by the temperature difference when water vapor is introduced, thereby reducing the stress accumulation and deformation risk inside the leather.

[0014] 2. A stretching component is provided to apply appropriate pressure to the leather through the squeezing roller to make it stretch in a specific direction. This can not only improve the ductility of the leather, but also make it easier to adapt to shape changes when subjected to external force, thereby significantly improving its performance. The spacing of the squeezing rollers can also be adjusted to control the squeezing force of the leather, further optimize the stretching effect, and ensure that the leather meets the ideal physical properties and appearance requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the leather stretching and flattening device of the utility model;

[0016] Figure 2 This is an enlarged view of the housing, the stretching assembly and point A of the utility model;

[0017] Figure 3 This is an enlarged view of the feed port, discharge port, extrusion roller and point B of the utility model;

[0018] Figure 4 This is an enlarged view of the operating table, housing and C of the utility model;

[0019] Figure 5 This is an enlarged view of the operating table, shell and D of the utility model.

[0020] In the figure: 1. operating table; 2. shell; 3. feed port; 4. discharge port; 5. extrusion roller; 6. preheating assembly; 601. fixed rod; 602. extrusion plate; 603. air vent; 604. heating plate; 605. exhaust hole; 7. stretching assembly; 701. first rotating rod; 702. second rotating rod; 703. sliding groove; 704. fixing part; 705. fixing frame; 706. limiting hole; 707. sliding hole; 708. sliding plate; 709. limiting rod; 710. spring; 711. driving pulley; 712. driven pulley; 713. synchronous belt; 714. motor; 8. pull ring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The utility model provides Figure 1 - Figure 5The leather stretching and flattening device shown in the figure comprises an operating table 1, a housing 2, a feed port 3 and a discharge port 4, the inner wall of the housing 2 is rotatably provided with a squeezing roller 5 for stretching the leather, and the inner wall of the housing 2 is provided with a preheating component 6 for preheating the leather;

[0023] The preheating assembly 6 includes a fixed rod 601, an extrusion sheet 602, an air vent 603, a heating sheet 604 and an exhaust hole 605. The fixed rod 601 is arranged on the inner wall of the shell 2, the extrusion sheet 602 is arranged at one end of the fixed rod 601 close to the operating table 1, the air vents 603 are equidistantly arranged on the surface of the extrusion sheet 602, the heating sheet 604 is equidistantly arranged on the surface of the extrusion sheet 602 and located between the air vents 603, and the exhaust hole 605 is opened on the surface of the shell 2.

[0024] A stretching assembly 7 for adjusting the squeezing roller 5 is provided on the shell 2, and the stretching assembly 7 includes a first rotating rod 701, a second rotating rod 702, a sliding groove 703, a fixing member 704, a fixing frame 705, a limiting hole 706, a sliding hole 707, a sliding plate 708, a limiting rod 709, a spring 710, a driving pulley 711, a driven pulley 712, a synchronous belt 713 and a motor 714. The first rotating rod 701 is rotatably arranged on the inner wall of the shell 2 through a bearing, the squeezing roller 5 is arranged on the surface of the first rotating rod 701, the second rotating rod 702 is rotatably arranged on one side of the shell 2 through a bearing, and the sliding groove 703 is opened on both sides of the shell 2.

[0025] The fixing member 704 is arranged at one end of the first rotating rod 701 away from the second rotating rod 702, the fixing frame 705 is arranged at a side of the fixing member 704 away from the first rotating rod 701, the limiting holes 706 are equidistantly arranged at a side of the housing 2 close to the fixing frame 705, the sliding hole 707 is arranged on the surface of the fixing member 704, the sliding plate 708 is slidably arranged on the inner wall of the fixing frame 705, the limiting rod 709 is arranged on the sliding plate 708, the limiting rod 709 passes through the sliding hole 707 and is plugged into the limiting groove, and the spring 71 0 is arranged on the sliding plate 708, one end of the spring 710 is fixed to the fixing frame 705, the driving pulley 711 is arranged at the end of the second rotating rod 702 away from the housing 2, the driven pulley 712 is arranged at the end of the first rotating rod 701 away from the fixing frame 705, the driving pulley 711 and the driven pulley 712 are rotated by a synchronous belt 713, the motor 714 is arranged on a side of the housing 2 close to the driving pulley 711, and the output end of the motor 714 is fixed to the driving pulley 711.

[0026] It should be noted that the synchronous belt 713 has a certain elasticity, and the distance of adjusting the spacing of the squeezing rollers 5 is within the tensile strength of the synchronous belt 713 .

[0027] The two sides of the extrusion sheet 602 are arranged in an arc shape. The arc design enables the extrusion sheet 602 to fit the leather surface more easily and naturally, which not only reduces the resistance during the processing, but also increases the contact area between the leather and the extrusion sheet 602, thereby ensuring that the leather is subjected to uniform pressure during the extrusion process.

[0028] A pull ring 8 is provided on one side of the sliding plate 708 away from the limiting rod 709 . The provision of the pull ring 8 enables an operator to pull the sliding plate 708 easily and quickly.

[0029] Working principle: when the leather needs to be stretched, the heating plate 604 is turned on, and the driving motor 714 is rotated. The output end of the motor 714 rotates to drive the active pulley 711 to rotate, and the first rotating rod is driven to rotate through the synchronous belt 713. The first rotating rod 701 rotates to drive the squeezing roller 5 to rotate, and then the staff pushes the leather into the feed port 3, and the squeezing roller 5 rotates to contact the leather to extrude and stretch it. The squeezing roller 5 continues to rotate to push the leather to slide to the squeezing plate 602, and the squeezing plate 602 contacts the leather and transfers heat to the leather, which can ensure that the leather is evenly heated in the preheating stage. When the squeezing roller 5 squeezes the evenly heated leather again, the leather that has been heated and stretched for the first time has a certain degree of ductility and softness. On this basis, when the evenly heated leather is squeezed by the squeezing roller 5 again, the fiber structure inside the leather will be further adjusted and optimized, which can make the leather more uniform and dense, thereby improving its overall physical properties and durability.

[0030] When the spacing of the extrusion rollers 5 needs to be adjusted, the pull ring 8 is pulled by hand to make the sliding plate 708 slide outward with the limiting rod 709. At this time, the spring 710 is under pressure. When the limiting rod 709 completely slides out of the limiting groove, the fixing part 704 is slid along the sliding groove 703. When it is adjusted to a suitable position, the limiting rod 709 is aligned with the limiting groove. At this time, the pull ring 8 is released by hand, and the spring 710 recovers its deformation to push the sliding plate 708 and the limiting rod 709 to slide in the direction of the limiting groove, so that the limiting rod 709 is plugged into the limiting groove.

Claims

1. A leather stretching and smoothing device, comprising an operating table (1), a housing (2), a feed inlet (3) and a discharge outlet (4), characterized in that: The inner wall of the shell (2) is rotatably provided with a squeezing roller (5) for stretching the leather, and the inner wall of the shell (2) is provided with a preheating component (6) for preheating the leather; The preheating assembly (6) comprises a fixing rod (601), an extrusion sheet (602), an air vent (603), a heating sheet (604) and an exhaust hole (605); the fixing rod (601) is arranged on the inner wall of the shell (2); the extrusion sheet (602) is arranged at one end of the fixing rod (601) close to the operating table (1); the air vent (603) is equidistantly arranged on the surface of the extrusion sheet (602); the heating sheet (604) is equidistantly arranged on the surface of the extrusion sheet (602) and located between the air vents (603); and the exhaust hole (605) is arranged on the surface of the shell (2).

2. The leather stretching and smoothing device according to claim 1, characterized in that: The shell (2) is provided with a stretching assembly (7) for adjusting the squeezing roller (5), and the stretching assembly (7) comprises a first rotating rod (701), a second rotating rod (702), a sliding groove (703), a fixing member (704), a fixing frame (705), a limiting hole (706), a sliding hole (707), a sliding plate (708), a limiting rod (709), a spring (710), a driving pulley (711), a driven pulley (712), a synchronous belt (713) and a motor (714); the first rotating rod (701) is rotatably arranged on the inner wall of the shell (2) via a bearing, the squeezing roller (5) is arranged on the surface of the first rotating rod (701), the second rotating rod (702) is rotatably arranged on one side of the shell (2) via a bearing, and the sliding groove (703) is provided on both sides of the shell (2).

3. The leather stretching and smoothing device according to claim 2, characterized in that: The fixing member (704) is arranged at one end of the first rotating rod (701) away from the second rotating rod (702); the fixing frame (705) is arranged on a side of the fixing member (704) away from the first rotating rod (701); the limiting holes (706) are equidistantly arranged on a side of the housing (2) close to the fixing frame (705); the sliding hole (707) is arranged on the surface of the fixing member (704); the sliding plate (708) is slidably arranged on the inner wall of the fixing frame (705); the limiting rod (709) is arranged on the sliding plate (708); the limiting rod (709) passes through the sliding hole (707) and is plugged into the limiting groove; the spring (706) is arranged on the sliding plate (708); The spring (710) is arranged on the sliding plate (708), one end of the spring (710) is fixed to the fixing frame (705), the driving pulley (711) is arranged at the end of the second rotating rod (702) away from the housing (2), the driven pulley (712) is arranged at the end of the first rotating rod (701) away from the fixing frame (705), the driving pulley (711) and the driven pulley (712) are rotated by a synchronous belt (713), the motor (714) is arranged on a side of the housing (2) close to the driving pulley (711), and the output end of the motor (714) is fixed to the driving pulley (711).

4. The leather stretching and smoothing device according to claim 1, characterized in that: The two sides of the extrusion sheet (602) are arranged in an arc shape.

5. The leather stretching and smoothing device according to claim 3, characterized in that: A pull ring (8) is provided on one side of the sliding plate (708) away from the limiting rod (709).

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