Leather surface composite production equipment of water-based synthetic leather
By designing a multi-layered production equipment suitable for water-based synthetic leather, and adopting water-cooled drum cooling and zoned temperature-controlled drying technology, the problem of low drying efficiency in the production of water-based synthetic leather has been solved, achieving high-efficiency production and quality assurance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHANGJIAGANG JIUHONG PRINTING & DYEING MASCH CO LTD
- Filing Date
- 2025-06-21
- Publication Date
- 2026-05-12
AI Technical Summary
Existing waterborne synthetic leather production equipment cannot be directly applied to the multi-layered structure of water-dispersible polyurethane resin, and the drying process is heat-intensive and slow, affecting production efficiency and product quality.
A device including a release paper feeding device, a water-based polyurethane coating machine, an oven, a cooling device, and a wet-laying assembly was designed. It adopts water-cooled roller cooling and zoned temperature-controlled drying to adapt to the multi-layer structure of water-based synthetic leather, thereby improving drying efficiency and product quality.
It enables efficient processing and production of water-based synthetic leather, ensuring molding quality. The equipment has a compact structure, wide applicability, high cooling efficiency, and saves space.
Smart Images
Figure CN224227443U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a leather surface composite production equipment for water-based synthetic leather. Background Technology
[0002] Most existing synthetic leathers have a structure of base fabric, adhesive layer, and surface layer. Since the surface layer and adhesive layer often use a large amount of organic solvents, the environmental friendliness of this type of leather is relatively poor.
[0003] Water-dispersed polyurethane resins are used to replace traditional solvent-dissolved polyurethane resins in the production of synthetic leather. The resulting synthetic leather is water-based synthetic leather, which has better environmental performance and is an important direction for the development of synthetic leather.
[0004] Waterborne synthetic leather typically has a multi-layered structure consisting of a top layer (one or more layers of waterborne polyurethane), a foamed adhesive layer (waterborne resin), and a base fabric. The production of this type of synthetic leather cannot be directly achieved using existing synthetic leather production lines. Furthermore, since the heat required for water evaporation is far greater than that for organic solvents, the drying process requires significant heat and has a slow drying rate, which are also issues that need to be considered in equipment design. Utility Model Content
[0005] The technical problem to be solved by this utility model is to provide a leather surface composite production equipment for water-based synthetic leather.
[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a leather surface composite production equipment for water-based synthetic leather, comprising a release paper feeding device, a water-based polyurethane coating machine, a front drying oven, a foaming water-based resin coating device, a leather base fabric feeding and wet bonding assembly, a rear drying oven, a release paper peeling device, a leather winding device, and a paper winding device arranged sequentially on an installation plane; a front cooling device is provided between the front drying oven and the foaming agent coating device on the installation plane; a rear cooling device is provided between the rear drying oven and the release paper peeling device.
[0007] As a preferred embodiment, a water-based polyurethane secondary coating machine, a mid-stage oven, and a mid-stage cooling device are sequentially arranged on the mounting plane between the front-stage cooling device and the foaming agent coating device.
[0008] As a preferred embodiment, the release paper feeding device includes a release paper unwinding machine, a paper receiving platform, and a paper storage rack arranged sequentially on the mounting plane.
[0009] As a preferred embodiment, the front cooling device, the middle cooling device, and the rear cooling device are all water-cooled drum cooling devices.
[0010] As a preferred embodiment, the downstream cooling device is an eight-roller water-cooled drum cooling device.
[0011] As a preferred embodiment, the wet bonding assembly includes a frame, on which a drive roller is rotatably mounted. One end of the drive roller's shaft extends out of the frame and is connected to a power unit. The other end of the drive roller's shaft extends out of the frame and is equipped with a drive sprocket. A driven sprocket is mounted on the frame below the drive sprocket. A drive chain is fitted onto the drive sprocket and the driven sprocket. The axle of the driven sprocket is connected to the detection shaft of an angle measuring instrument mounted on the frame. A rocker arm is movably mounted on each end of the drive roller's shaft on the inner side of the frame. A passive pressure roller is rotatably mounted between the two rocker arms. A horizontal lead screw is arranged radially parallel to the passive pressure roller on the frame. An adjusting handwheel is located at the end of the horizontal lead screw. A longitudinal slide rail is provided on the rocker arm. One end of a movable block on the horizontal lead screw is movably engaged in the slide rail.
[0012] As a preferred embodiment, the front drying oven includes at least three drying units, the middle drying oven includes at least three drying units, and the rear drying oven includes at least ten drying units. The drying temperature range is 100-150℃. Each drying unit is equipped with a heating coupler and a thermometer. The outer side of the frontmost and rearmost drying units are equipped with feeding rollers driven by a feeding power device.
[0013] As a preferred embodiment, the drying unit includes a box body with several free rollers inside. An upper air supply duct is located above the free rollers, and a lower air supply duct is located below the free rollers. The upper air supply duct has several nozzles facing the free rollers, and the lower air supply duct also has several nozzles facing the free rollers. The top of the box body has several dehumidification ports, and a dehumidification fan is located at each dehumidification port. An air supply port is located on the side of the box body. A circulating fan is located at the bottom of the box body. An air inlet pipe is located at the air inlet of the circulating fan, and an air outlet pipe is located at the air outlet of the circulating fan. Both the upper and lower air supply ducts are connected to the air outlet pipe.
[0014] As a preferred embodiment, the installation height of the free rollers in the feeding side drying unit of the downstream oven gradually increases along the feeding direction; the installation height of the free rollers in the discharging side drying unit of the downstream oven gradually decreases along the feeding direction.
[0015] As a preferred embodiment, the nozzle of the front drying oven unit is equilateral triangular, the nozzle of the rear drying oven unit is inverted triangular, and the upper part of the nozzle of the middle drying oven unit is inverted trapezoidal.
[0016] The beneficial effects of this utility model are:
[0017] This utility model provides a production equipment for water-based synthetic leather, which can efficiently complete the processing and production of water-based synthetic leather and ensure its molding quality. At the same time, the overall structure of the equipment is compact and occupies little space.
[0018] Since both the front-end and rear-end cooling devices are water-cooled drum cooling devices, they have higher cooling efficiency than air-cooled or wind-cooled devices.
[0019] Since the downstream cooling device is an eight-roller water-cooled roller cooling device, and each roller is equipped with a cooling fan directly facing the contact point between the fabric and the roller, the cooling efficiency is higher, and the equipment occupies less space, saving equipment installation space.
[0020] The wet bonding assembly includes a frame with a rotating drive roller on it. One end of the drive roller's shaft extends out of the frame and is connected to a power unit. The other end of the drive roller's shaft extends out of the frame and is equipped with a drive sprocket. A driven sprocket is located below the drive sprocket on the frame. A drive chain is fitted onto both the drive and driven sprockets. The axle of the driven sprocket is connected to the detection shaft of an angle measuring instrument mounted on the frame. A rocker arm is movably fitted onto each end of the drive roller's shaft on the inner side of the frame. A passive pressure roller is rotatably mounted between the two rocker arms. A horizontal lead screw is arranged radially parallel to the passive pressure roller on the frame. An adjusting handwheel is located at the end of the horizontal lead screw. A longitudinal slide rail is located on the rocker arm. One end of a movable block on the horizontal lead screw is movably engaged in the slide rail. The bonding gap can be adjusted according to the needs of different products, thereby ensuring that the embedding depth between the base fabric and the foam layer meets the requirements, making the equipment suitable for processing a wider variety of products.
[0021] The front drying oven includes at least three drying units, the middle drying oven includes at least three drying units, and the rear drying oven includes at least ten drying units. The drying temperature range is 100-150℃. Each drying unit is equipped with a heating coupler and a thermometer. The outer sides of the front and rear drying units are equipped with feeding rollers driven by a feeding power unit. Zoned temperature control drying allows the equipment to be set with suitable drying temperatures for different products, thereby enhancing the equipment's applicability.
[0022] The drying unit includes a housing with several free rollers inside. An upper air supply duct is located above the free rollers, and a lower air supply duct is located below them. The upper and lower air supply ducts each have several nozzles facing the free rollers. The top of the housing has several dehumidification ports with dehumidification fans installed at them. Air supply ports are located on the sides of the housing. A circulating fan is located at the bottom of the housing, with an inlet pipe at its inlet and an outlet pipe at its outlet. Both the upper and lower air supply ducts are connected to the outlet pipe.
[0023] Because the installation height of the free rollers in the feeding side drying unit of the subsequent drying oven gradually increases along the feeding direction, and the installation height of the free rollers in the discharging side drying unit of the subsequent drying oven gradually decreases along the feeding direction, the leather material is kept in a slightly taut state. This facilitates the conveying of the leather material while preventing wrinkles, thereby further ensuring product quality.
[0024] Since the nozzle of the drying unit in the front oven is equilateral triangular, the nozzle of the drying unit in the rear oven is inverted triangular, and the upper part of the nozzle of the drying unit in the middle oven is inverted trapezoidal, the different nozzle shapes can better adapt to the blowing requirements of each stage of the product. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the structure of this utility model;
[0026] Figure 2 This is a schematic diagram of the main structure of the drying unit;
[0027] Figure 3 This is a side view of the drying unit.
[0028] Figure 4 This is a schematic diagram of the main structure of the wet-lay assembly;
[0029] Figure 5 This is a side view of the wet-lay assembly.
[0030] In the diagram: 1. Release paper unwinding machine; 2. Paper receiving table; 3. Paper storage rack; 4. Water-based polyurethane coating machine; 5. Front drying oven; 6. Foaming water-based resin coating device; 7. Leather base fabric feeding and wet bonding assembly; 8. Rear drying oven; 9. Release paper peeling device; 10. Leather winding device; 11. Paper winding device; 12. Front cooling device; 13. Rear cooling device; 14. Water-based polyurethane secondary coating machine; 15. Middle drying oven; 16. Middle cooling device.
[0031] 17 Heating coupler, 18 Temperature measuring instrument, 19 Feeding roller; 20 Box body, 21 Free roller, 22 Upper air supply duct, 23 Lower air supply duct, 24 Spray nozzle, 25 Dehumidifier, 26 Circulating fan, 27 Air inlet pipe, 28 Air outlet pipe.
[0032] 71 Frame, 72 Drive roller, 73 Power unit, 74 Drive sprocket, 75 Driven sprocket, 76 Drive chain, 77 Angle detector, 78 Rocker arm, 79 Passive pressure roller, 710 Horizontal lead screw, 711 Adjusting handwheel. Detailed Implementation
[0033] The specific implementation scheme of this utility model will now be described in detail with reference to the accompanying drawings.
[0034] like Figure 1-5As shown, a leather surface composite production equipment for water-based synthetic leather includes a release paper feeding device, a water-based polyurethane coating machine 4, a front drying oven 5, a foaming water-based resin coating device 6, a leather base fabric feeding and wet bonding assembly 7, a rear drying oven 8, a release paper peeling device 9, a leather material winding device 10, and a paper material winding device 11, which are sequentially arranged on the mounting plane. A front cooling device 12 is provided between the front drying oven 5 and the foaming agent coating device 6. A rear cooling device 13 is provided between the rear drying oven 8 and the release paper peeling device 9.
[0035] The release paper feeding device includes a release paper unwinding machine 1, a receiving platform 2, and a paper storage rack 3, which are sequentially arranged on the mounting plane. On the mounting plane, between the front cooling device 12 and the foaming agent coating device, are sequentially arranged a water-based polyurethane secondary coating machine 14, a middle drying oven 15, and a middle cooling device 16. The front cooling device 12 and the middle cooling device 16 are four-roller water-cooled roller cooling devices. The rear cooling device 13 is an eight-roller water-cooled roller cooling device.
[0036] The wet bonding assembly includes a frame 71, on which a drive roller 72 is rotatably mounted. One end of the drive roller 72's shaft extends out of the frame 71 and is connected to a power unit 73. The other end of the drive roller 72's shaft extends out of the frame 71 and is provided with a drive sprocket 74. A driven sprocket 75 is provided on the frame 71 below the drive sprocket 74. A drive chain 76 is fitted on the drive sprocket 74 and the driven sprocket 75. The axle of the driven sprocket 75 is connected to the detection shaft of an angle measuring instrument 77 mounted on the frame 71. A rocker arm 78 is movably mounted on each end of the drive roller 72's shaft on the inner side of the frame 71. A passive pressure roller 79 is rotatably mounted between the two rocker arms 78. A horizontal lead screw 710 is provided on the frame 71, arranged radially parallel to the passive pressure roller 79. An adjusting handwheel 711 is provided at the end of the horizontal lead screw 710. A longitudinal slide rail is provided on the rocker arm 78. One end of a movable block on the horizontal lead screw 710 is movably engaged in the slide rail.
[0037] The front drying oven includes at least three drying units, the middle drying oven 15 includes at least three drying units, and the rear drying oven includes at least ten drying units. The drying temperature range is 100-150℃. Each drying unit is equipped with a heating coupler 17 and a thermometer 18. The outer side of the frontmost and rearmost drying units is equipped with feeding rollers 19 driven by a feeding power device.
[0038] The drying unit includes a housing 20, within which several free rollers 21 are installed. An upper air supply duct 22 is located above the free rollers 21, and a lower air supply duct 23 is located below them. The upper air supply duct 22 has several nozzles 24 facing the free rollers 21, and the lower air supply duct 23 also has several nozzles 24 facing the free rollers 21. Several dehumidification ports are located at the top of the housing 20, and dehumidification fans 25 are installed at these ports. Air supply ports are located on the sides of the housing 20. A circulating fan 26 is located at the bottom of the housing 20. An air inlet pipe 27 is located at the air inlet of the circulating fan 26, and an air outlet pipe 28 is located at the air outlet of the circulating fan 26. Both the upper and lower air supply ducts 22 and 23 are connected to the air outlet pipe 28.
[0039] The installation height of the free roller 21 in the feed side drying unit of the downstream oven gradually increases along the feeding direction; the installation height of the free roller 21 in the discharge side drying unit of the downstream oven gradually decreases along the feeding direction.
[0040] The nozzle 24 of the drying unit in the front drying oven is in the shape of an equilateral triangle, the nozzle 24 of the drying unit in the rear drying oven is in the shape of an inverted triangle, and the upper part of the nozzle 24 of the drying unit in the middle drying oven 15 is in the shape of an inverted trapezoid.
[0041] The above embodiments are merely illustrative of the principles and effects of this utility model, as well as some of its applications, and are not intended to limit this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.
Claims
1. A leather surface composite production equipment for water-based synthetic leather, characterized in that: The system includes, in sequence, a release paper feeding device, a water-based polyurethane coating machine, a pre-drying oven, a foaming water-based resin coating device, a leather base fabric feeding and wet-laying assembly, a post-drying oven, a release paper peeling device, a leather winding device, and a paper winding device, all arranged on an installation plane. A pre-drying cooling device is located between the pre-drying oven and the foaming agent coating device on the installation plane. A post-drying cooling device is located between the post-drying oven and the release paper peeling device. A water-based polyurethane secondary coating machine, a middle-drying oven, and a middle-drying cooling device are sequentially arranged between the pre-drying cooling device and the foaming agent coating device on the installation plane. The pre-drying oven includes at least three drying units, the middle-drying oven includes at least three drying units, and the post-drying oven includes at least ten drying units. The drying temperature range is 100-150℃. Each drying unit is equipped with a heating coupler and a thermometer. Feeding rollers driven by a feeding power device are located on the outer side of the frontmost and rearmost oven units.
2. The leather surface composite production equipment for water-based synthetic leather as described in claim 1, characterized in that: The release paper feeding device includes a release paper unwinding machine, a paper receiving platform, and a paper storage rack, which are arranged sequentially on the mounting plane.
3. The leather surface composite production equipment for water-based synthetic leather as described in claim 2, characterized in that: The front cooling device, the middle cooling device, and the rear cooling device are all water-cooled drum cooling devices.
4. The leather surface composite production equipment for water-based synthetic leather as described in claim 3, characterized in that: The downstream cooling device is an eight-roller water-cooled drum cooling device.
5. The leather surface composite production equipment for water-based synthetic leather as described in claim 1, characterized in that: The wet bonding assembly includes a frame, on which a drive roller is rotatably mounted. One end of the drive roller's shaft extends out of the frame and is connected to a power unit. The other end of the drive roller's shaft extends out of the frame and is equipped with a drive sprocket. A driven sprocket is mounted on the frame below the drive sprocket. A drive chain is fitted onto the drive sprocket and the driven sprocket. The axle of the driven sprocket is connected to the detection shaft of an angle measuring instrument mounted on the frame. A rocker arm is movably mounted on each end of the drive roller's shaft on the inner side of the frame. A passive pressure roller is rotatably mounted between the two rocker arms. A horizontal lead screw is arranged radially parallel to the passive pressure roller on the frame. An adjusting handwheel is located at the end of the horizontal lead screw. A longitudinal slide rail is provided on the rocker arm. One end of a movable block on the horizontal lead screw is movably engaged in the slide rail.
6. The leather surface composite production equipment for water-based synthetic leather as described in claim 1, characterized in that: The drying unit includes a box body with several free rollers inside. An upper air supply duct is located above the free rollers, and a lower air supply duct is located below the free rollers. The upper air supply duct has several nozzles facing the free rollers, and the lower air supply duct also has several nozzles facing the free rollers. Several dehumidification ports are located at the top of the box body, and dehumidification fans are installed at the dehumidification ports. An air supply port is located on the side of the box body. A circulating fan is located at the bottom of the box body. An air inlet pipe is located at the air inlet of the circulating fan, and an air outlet pipe is located at the air outlet of the circulating fan. Both the upper and lower air supply ducts are connected to the air outlet pipe.
7. The leather surface composite production equipment for water-based synthetic leather as described in claim 6, characterized in that: The installation height of the free rollers in the feeding side drying unit of the downstream oven gradually increases along the feeding direction; the installation height of the free rollers in the discharging side drying unit of the downstream oven gradually decreases along the feeding direction.
8. The leather surface composite production equipment for water-based synthetic leather as described in claim 7, characterized in that: The nozzles of the front drying unit are equilateral triangles, the nozzles of the rear drying unit are inverted triangles, and the upper part of the nozzles of the middle drying unit is an inverted trapezoidal shape.