Double-sided leather preparation device

Abstract

The utility model discloses a double-sided leather preparation device, which is used for covering double-sided PU (polyurethane) coatings on base cloth, relates to the technical field of coating equipment, and comprises an impregnation tank and a coagulating tank, a base cloth output device is arranged on one side of the impregnation tank, a base cloth leveling device is arranged on the other side of the impregnation tank, and the coagulating tank is arranged on the outlet side of the base cloth leveling device. The coagulating tank is in an inverted L shape and is divided into a first coagulating area on the inlet side and a second coagulating area on the outlet side, the first coagulating area extends to the position below the ground, the second coagulating area is located above the ground, and an opposite pressing device is arranged at an outlet of the second coagulating area. The coagulating tank is divided into the first coagulating area and the second coagulating area, the first coagulating area is arranged under the ground to replace a traditional steering roller, the retention time of the base cloth in the coagulating tank is prolonged, meanwhile, when the base cloth moves in the first coagulating area, slurry on the surface layer can permeate to the bottom layer of the base cloth due to the tension of the base cloth, and the slurry on the surface layer can permeate to the bottom layer of the base cloth. And thus, a double-faced skin layer is formed in the solidification process.

Description

Technical Field

[0001] The utility model relates to the technical field of coating equipment, in particular to a double-sided leather preparation device. Background Art

[0002] The production method of wet PU leather is to add DMF solvent and other fillers and additives to the polyurethane wet resin to make a mixed liquid, degas it with a vacuum machine, impregnate or coat it on the base fabric, and then put it into water that has affinity with the solvent (DMF) but not with the polyurethane resin. The solvent (DMF) is replaced by water, and the polyurethane resin gradually solidifies, thereby forming a porous leather film.

[0003] PU leather is widely used in sofas, bags, leather shoes, belts, decorative surfaces and other fields. However, when PU leather is used as the material of bags, once the bags are opened, the back of the PU leather will be visible. At present, PU leather is generally a single-sided structure, and the back of the PU leather is the base layer, which greatly reduces the overall beauty of the bags made of PU leather after opening.

[0004] In the coagulation process of existing wet leather, in order to save space, a turning roller is usually set in the coagulation tank to extend the residence time of the base fabric in the coagulation tank. However, the turning roller will push off the slurry on the side of the base fabric that contacts the turning roller during the turning process of the base fabric, so that only a single layer of PU leather can be prepared. Utility Model Content

[0005] The utility model aims to overcome the deficiencies of the prior art and provide a double-sided leather preparation device.

[0006] The purpose of this utility model is achieved through the following technical solutions:

[0007] A double-sided leather preparation device is used to cover a base fabric with a double-sided PU coating, comprising an impregnation tank and a coagulation tank, wherein a base fabric output device is provided on one side of the impregnation tank, and a base fabric flattening device is provided on the other side, wherein the coagulation tank is provided on the outlet side of the base fabric flattening device, and the coagulation tank is in an inverted "L" shape, and is divided into a first coagulation zone on the inlet side and a second coagulation zone on the outlet side, wherein the first coagulation zone extends below the ground, and the second coagulation zone is above the ground, and a counter-pressure device is provided at the outlet of the second coagulation zone.

[0008] Specifically, the base fabric output device comprises a base fabric roller and a first support column, and the base fabric roller is fixed on the first support column.

[0009] The above-mentioned base cloth roller includes at least one supporting plate and a limiting plate, a sliding plate is fixed at one end of the supporting plate, the sliding plate is slidably connected to the limiting plate, a hydraulic telescopic rod is provided inside the supporting plate, a sleeve is fixed to the telescopic part of the hydraulic telescopic rod, a support rod is provided between the supporting plate and the sleeve, and the support rod is fixed to the supporting plate and the sleeve in a hinged manner.

[0010] Specifically, the base cloth leveling device includes a steering roller and a second support column, the steering roller is fixed on the second support column, a scraper is arranged above the steering roller, the scraper is fixed on the second support column, and a motor is arranged on the steering roller to control the steering roller to rotate actively.

[0011] A laser ranging sensor is installed in the above-mentioned first solidification zone. The laser ranging sensor is set on the groove wall just below the lowest point of the base cloth. The laser ranging sensor is used to detect whether the lowest point of the base cloth is located within the set threshold area. The laser ranging sensor is connected to a microcontroller, and the microcontroller is connected to a variable frequency motor that controls the rotation of the steering roller.

[0012] Specifically, the pressing device includes a pressing roller and a third supporting column, and the pressing roller is fixed on the third supporting column.

[0013] Furthermore, a limiting roller is provided at the junction of the first solidification zone and the second solidification zone, a driving motor is installed on the limiting roller, and the linear speed of the limiting roller is the same as the linear speed of the base fabric roller.

[0014] Furthermore, a bubbler is provided in the first coagulation zone and the second coagulation zone.

[0015] The beneficial effects of the utility model are:

[0016] 1) The coagulation tank in the utility model is divided into a first coagulation zone and a second coagulation zone. By setting the first coagulation zone below the ground instead of the traditional setting of a turning roller, the residence time of the base cloth in the coagulation tank is prolonged. At the same time, when the base cloth moves in the first coagulation zone, the surface slurry can penetrate into the bottom layer of the base cloth due to the tension of the base cloth itself, thereby forming a double-sided skin layer during the coagulation process.

[0017] 2) Through the cooperation of the hydraulic telescopic rod and the support rod, the diameter of the base fabric roller can adapt to the upper roller hole reserved for different base fabric rolls, so that there is no relative movement between the base fabric roll and the base fabric roller.

[0018] 3) Through the cooperation between the laser distance measuring sensor in the first solidification zone and the motor controlling the rotation of the steering roller, the residence state and residence time of the base fabric in the impregnation tank and the solidification tank can be controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a double-sided leather preparation device;

[0020] Figure 2 is a cross-sectional view of a base fabric roller;

[0021] In the figure, 1-ground, 2-first support column, 31-base fabric roll, 31-base fabric, 4-base fabric roller, 5-impregnation tank, 6-second support column, 7-scraper, 8-steering roller, 9-limiting roller, 10-first solidification zone, 11-second solidification zone, 12-laser ranging sensor, 13-bubble machine, 14-counter-pressure roller, 15-third support column, 16-support plate, 17-support rod, 18-hydraulic telescopic rod, 19-sleeve, 20-sliding plate, 21-card slot, 22-limiting plate. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments to clearly and completely describe the technical solution 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 of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1 , the utility model provides a technical solution:

[0024] A double-face leather preparation device comprises an impregnation tank 5 and a coagulation tank, wherein the coagulation tank is in an inverted "L" shape and is divided into a first coagulation zone 10 on the inlet side and a second coagulation zone 11 on the outlet side, wherein the first coagulation zone 10 partially extends below the ground 1, and the second coagulation zone 11 is entirely above the ground 1; a base fabric 31 is released from a base fabric roll 31 into the impregnation tank 5, and then passes through a turning roller 8, a first coagulation zone 10, a second coagulation zone 11 and a counter-pressing roller 14 in sequence, and the base fabric roll 31 rotates with the base fabric roller 4 to move the base fabric 31 The base fabric roller 4 is released from the base fabric roll 31 and is driven by a motor. The base fabric roller 4 is supported off the ground 1 by the first support column 2 and is fixed on the first support column 2. The steering roller 8 is arranged above the impregnation tank 5 side through the second support column 6. The steering roller 8 is provided with a motor to control its active rotation. A scraper 7 for leveling the surface of the base fabric 31 and scraping off excess slurry is arranged above the steering roller 8. The scraper 7 is fixed on the second support column 6. The pressure roller 14 is arranged above the second solidification zone 11 side through the third support column 15.

[0025] In order to improve the fluidity of the liquid in the coagulation tank, a bubbler 13 is installed at the bottom of the tank.

[0026] A laser ranging sensor 12 is installed in the first coagulation zone 10 to detect the lowest point of the leather in the first coagulation zone 10. The laser ranging sensor 12 is connected to a microcontroller, and the microcontroller is connected to a variable frequency motor that controls the rotation of the steering roller 8. When the laser ranging sensor 12 detects that the lowest position of the leather in the first coagulation zone 10 is lower than the minimum threshold, the laser ranging sensor 12 sends a deceleration signal to the microcontroller, and the microcontroller controls the steering roller 8 motor to decelerate to ensure that the base cloth 31 is not stacked in the first coagulation zone 10; when the laser ranging sensor 12 detects that the highest position of the leather in the first coagulation zone 10 is higher than the maximum threshold, the laser ranging sensor 12 sends an acceleration signal to the microcontroller, and the microcontroller controls the steering roller 8 motor to accelerate to ensure that the base cloth 31 is immersed in the first coagulation zone 10 with the maximum area.

[0027] The laser distance measuring sensor 12 provided in the present invention can also set the position threshold of the laser distance measuring sensor 12 according to different required impregnation time and coagulation time, so as to adjust the residence time of the base fabric 31 in the impregnation tank 5 and the coagulation tank.

[0028] In order to ensure that the films on both sides of the prepared double-sided leather are uniform, a limiting roller 9 is set at the junction of the first coagulation zone 10 and the second coagulation zone 11 to control the double-sided thickness of the incompletely coagulated film. A motor is set on the limiting roller 9 to control the rotation linear speed of the limiting roller 9 to be the same as the linear speed of the base cloth roller 4.

[0029] See also Figure 2 In order to adapt to the upper roller holes of different sizes reserved for the base fabric roll 31, the base fabric roller 4 is set as a roller of variable size, including a support plate 16, a sliding plate 20 is fixed at one end of the support plate 16, and the sliding plate 20 can be slid up and down and fixed on the limit plate 22 through a card slot 21. The utility model adopts four support plates 16, and the four support plates 16 are surrounded by a cylindrical shape. A hydraulic telescopic rod 18 is provided inside the cylindrical shape formed by the support plates 16, and the hydraulic telescopic rod 18 is fixed on the limit plate 22. A sleeve 19 is fixed on the outer periphery of the telescopic part of the hydraulic telescopic rod 18, and the sleeve 19 can slide on the fixed part of the hydraulic telescopic rod 18. A support rod 17 is connected between the support plate 16 and the sleeve 19, and both ends of the support rod 17 are fixed to the support plate 16 and the sleeve 19 by a hinged manner.

[0030] When the hydraulic telescopic rod 18 is extended, the sleeve 19 drives the support rod 17 to rotate, thereby reducing the distance between the support plate 16 and the hydraulic telescopic rod 18; when the hydraulic telescopic rod 18 is shortened, the telescopic part drives the support rod 17 to rotate, thereby increasing the distance between the support plate 16 and the hydraulic telescopic rod 18. The diameter of the cylinder formed by the support plate 16 is changed by the extension and contraction of the double-headed telescopic rod to adapt to the installation of different base cloth rolls 31. During the extension and contraction of the hydraulic telescopic rod 18, the support plate 16 can only move up and down due to the restriction between the sliding plate 20 and the limit plate 22.

[0031] The telescopic component used in the present invention is a hydraulic telescopic rod 18, and the telescopic method can also be achieved by using a telescopic rod, a gear rack, etc.; the number of support plates 16 and support rods 17 can be determined according to the situation.

[0032] The working process of this utility model:

[0033] The base fabric roll 31 is mounted on the base fabric roller 4, and the base fabric roll 31 is fixed on the base fabric roller 4 by adjusting the telescopic state of the hydraulic telescopic rod 18, so that there is no relative movement between the two; the base fabric 31 enters the impregnation tank 5, and is curved in the impregnation tank 5, and is immersed in the slurry of the impregnation tank 5 to the greatest extent without stacking, so that the slurry is applied to both sides of the base fabric 31; the base fabric 31 passes through the steering roller 8, and the steering roller 8 pushes the slurry on the bottom surface into the impregnation tank 5, and the base fabric 31 The surface slurry is scraped and cut flat by the scraper 7; then the base fabric 31 enters the first solidification zone 10. During the movement of the base fabric 31 in the first solidification zone 10 in a non-stacked curved state, due to the tension of the base fabric 31 itself and the fluidity of the slurry, the slurry on the surface of the base fabric 31 will penetrate into the bottom layer of the base fabric 31, and double-sided leather will be formed in the gradual solidification process; the base fabric 31 passes through the limiting roller 9 to even out the slurry thickness on both sides, and when passing through the pressing roller 14, the pressing roller 14 presses out excess water.

[0034] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A double-sided leather preparation device, for coating a base fabric (31) with a double-sided PU coating, comprising an impregnation tank (5) and a coagulation tank, characterized in that: The impregnation tank (5) is provided with a base fabric output device on one side and a base fabric flattening device on the other side. The coagulation tank is provided at the outlet side of the base fabric flattening device. The coagulation tank is in an inverted "L" shape. The coagulation tank is divided into a first coagulation zone (10) on the inlet side and a second coagulation zone (11) on the outlet side. The first coagulation zone (10) extends below the ground (1), and the second coagulation zone (11) is above the ground (1). A counter-pressure device is provided at the outlet of the second coagulation zone (11).

2. The double-sided leather preparation device according to claim 1, characterized in that: The base fabric (31) output device comprises a base fabric roller (4) and a first support column (2), wherein the base fabric roller (4) is fixed on the first support column (2).

3. The double-sided leather preparation device according to claim 2, characterized in that: The base fabric roller (4) comprises at least one support plate (16) and a limit plate (22); a sliding plate (20) is fixed to one end of the support plate (16); the sliding plate (20) is slidably connected to the limit plate (22); a hydraulic telescopic rod (18) is provided inside the support plate (16); a sleeve (19) is fixed to the telescopic portion of the hydraulic telescopic rod (18); a support rod (17) is provided between the support plate (16) and the sleeve (19); the support rod (17) is fixed to the support plate (16) and the sleeve (19) in a hinged manner.

4. The double-sided leather preparation device according to claim 1, characterized in that: The base cloth (31) flattening device comprises a steering roller (8) and a second support column (6), the steering roller (8) being fixed on the second support column (6), a scraper (7) being provided above the steering roller (8), the scraper (7) being fixed on the second support column (6), and a motor for controlling the active rotation of the steering roller (8) being provided on the steering roller (8).

5. The double-sided leather preparation device according to claim 4, characterized in that: A laser distance sensor (12) is installed in the first solidification zone (10). The laser distance sensor (12) is arranged on the groove wall directly below the lowest point of the base fabric (31) falling. The laser distance sensor (12) is used to detect whether the lowest point of the base fabric (31) falling is located within a set threshold area. The laser distance sensor (12) is connected to a microcontroller, and the microcontroller is connected to a variable frequency motor that controls the rotation of the steering roller (8).

6. The double-sided leather preparation device according to claim 1, characterized in that: The counter-pressing device comprises a counter-pressing roller (14) and a third support column (15), and the counter-pressing roller (14) is fixed on the third support column (15).

7. The double-face leather preparation device according to claim 1, characterized in that: A limiting roller (9) is provided at the junction of the first solidification zone (10) and the second solidification zone (11), a driving motor is mounted on the limiting roller (9), and the linear speed of the limiting roller (9) is the same as the linear speed of the base fabric roller (4).

8. The double-face leather preparation device according to claim 1, characterized in that: A bubbler (13) is provided in the first coagulation zone (10) and the second coagulation zone (11).

Images