A calendering device and calendering method for producing mirror-finish nylon fabric

Abstract

This invention relates to a calendering apparatus and method for producing mirror-finish nylon fabric, belonging to the technical field of nylon fabric calendering equipment. The calendering apparatus for producing mirror-finish nylon fabric includes a frame and an advancing device and a fabric exiting device respectively disposed on both sides of the frame. A chrome-plated metal heating roller is provided between the advancing device and the fabric exiting device. A first rubber roller and a second rubber roller are respectively provided on the upper and lower sides of the heating roller. Several guide rollers are also provided between the advancing device and the fabric exiting device. The nylon fabric of this invention passes through two gaps sequentially, and is calendered by the high-polished chrome-plated metal heating roller in conjunction with two high-temperature resistant rubber rollers. The heating roller can simultaneously perform secondary calendering of the nylon fabric with the first and second rubber rollers, improving calendering efficiency, resulting in higher fabric gloss and tensile strength, a thinner and lighter fabric surface, and a more comfortable feel.

Description

Technical Field

[0001] This invention belongs to the technical field of calendering equipment for nylon fabrics, specifically relating to a calendering device and calendering method for producing mirror nylon fabrics. Background Technology

[0002] Calendering, also known as rolling, is a crucial step in the finishing process of nylon fabrics. Nylon fabrics that have been rubbed and twisted by a calendering device exhibit improved smoothness and significantly enhanced luster, resulting in a mirror-like finish and improved fabric texture. Furthermore, the calendering device can also enhance the abrasion resistance of the nylon fabric, extending its lifespan.

[0003] Existing calendering devices mostly use metal rollers in conjunction with nylon rollers to calender fabrics. Nylon rollers are relatively hard and have a low coefficient of friction, easily damaging nylon fabrics and resulting in insufficient twisting effect. Chinese patent document CN201410231450.1 discloses a three-roll calender for textiles. The calender includes an upper roll, an intermediate roll, and a lower roll. The upper roll is a spindle-shaped roll; the intermediate roll is the driving roll; and the upper and lower rolls are driven rolls. The upper roll includes a roller shaft and a roll body, the roll body being composed of a pure nylon layer and a nano-alumina modified nylon layer. This calender modifies the nylon roller with nano-alumina. After modification with nano-alumina, the hardness and abrasion resistance of the nylon material are improved, extending its service life. However, the increased hardness of the modified nylon roller can easily damage the fabric surface, which is detrimental to improving the gloss effect of the fabric during the production of mirror-finish nylon fabrics. Summary of the Invention

[0004] The purpose of this invention is to provide a calendering apparatus and calendering method for producing mirror-finish nylon fabrics that enhances the gloss of the fabric, in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions:

[0006] A calendering device for producing mirror-finish nylon fabric includes a frame and an advancing device and a discharging device respectively disposed on both sides of the frame. A chrome-plated metal heating roller is provided between the advancing device and the discharging device. A first rubber roller and a second rubber roller are respectively provided on the upper and lower sides of the heating roller. Several guide rollers are also provided between the advancing device and the discharging device to guide the nylon fabric into the gap between the chrome-plated metal heating roller and the first and second rubber rollers. The nylon fabric passes through the two gaps sequentially from both sides of the heating roller. The nylon fabric is calendered by the high-polish chrome-plated metal heating roller in conjunction with the two high-temperature resistant rubber rollers. The heating roller can simultaneously calender the nylon fabric in the two gaps in conjunction with the first and second rubber rollers.

[0007] As a further optimization of the present invention, a first lifting device is fixedly provided at the top of the frame, a first positioning frame is fixedly provided at the output end of the first lifting device, and the first rubber roller is rotatably disposed inside the first positioning frame. A second lifting device is fixedly provided at the bottom of the frame, a second positioning frame is fixedly provided at the output end of the second lifting device, and the second rubber roller is rotatably disposed inside the second positioning frame.

[0008] As a further optimization of the present invention, the first positioning frame and the second positioning frame are both vertically slidably disposed on the side wall of the frame, and the frame guides the first rubber roller and the second rubber roller through the first positioning frame and the second positioning frame.

[0009] As a further optimization of the present invention, a first motor is fixedly mounted on the frame, one end of the heating roller is fixedly mounted on the output end of the first motor, and the other end of the heating roller is rotatably mounted on the side wall of the frame.

[0010] As a further optimization of the present invention, a second motor fixed to the frame is provided on one side of the first motor, a first sprocket is fixed at the output end of the second motor, a second sprocket is fixed at one end of the first rubber roller and one end of the second rubber roller, and the other ends of the first rubber roller and the other ends of the second rubber roller are rotatably connected to the side wall of the frame. The first sprocket is connected to the two second sprockets through a chain, and a third sprocket for tensioning the chain is provided between the two second sprockets and the first sprocket. The third sprocket is rotatably mounted on the side wall of the frame.

[0011] As a further optimization of the present invention, the second motor is fixed to the inner side of the mounting frame, and the frame is provided with a telescopic mechanism for driving the mounting frame to slide laterally on the frame. The telescopic mechanism cooperates with the third sprocket to tension the chain.

[0012] As a further optimization of the present invention, the telescopic mechanism includes a hydraulic cylinder located on one side of the mounting frame and fixed together with the frame, and a mounting shell fixed at the output end of the hydraulic cylinder. A pressure sensor is fixed inside the mounting shell on the side away from the hydraulic cylinder, and a connecting plate is fixed at the end of the pressure sensor away from the mounting frame. The connecting plate penetrates the mounting shell, and both ends of the connecting plate are respectively fixed on the front and rear sides of the mounting frame. The pressure sensor is used to collect the tension force formed by the mounting shell on the connecting plate.

[0013] A method for calendering mirror-finish nylon fabric includes the following steps:

[0014] S1, Height Adjustment

[0015] Based on the thickness of the nylon fabric, the height of the first positioning frame and the first rubber roller is adjusted by the first lifting device, and the height of the second positioning frame and the second rubber roller is adjusted by the second lifting device, so that the first rubber roller and the second rubber roller form two gaps with the heating roller that match the nylon fabric. During the process of adjusting the height of the first rubber roller and the second rubber roller, the position of the mounting frame, the second motor and the first sprocket are adjusted by the telescopic mechanism to cooperate with the second sprocket to tension the chain.

[0016] S2, Fabric conveying

[0017] The advancing device feeds nylon fabric from one side of the frame to the chrome-plated metal heating roller. Several guide rollers guide the nylon fabric fed by the advancing device, so that the nylon fabric passes through the gap between the heating roller and the first rubber roller from one side of the heating roller. Then, the nylon fabric is turned 180° and passes through the gap between the heating roller and the second rubber roller to form a secondary calendered fabric. The fabric output device outputs the secondary calendered fabric from the calendering device.

[0018] S3, Differential Pressing

[0019] The heating roller is driven to rotate by the first motor, and the first sprocket is driven to rotate by the second motor. The first sprocket, together with the chain and two third sprockets, drives the two second sprockets to rotate, so that the first rubber roller and the second rubber roller rotate at the same speed, and there is a speed difference between the first rubber roller, the second rubber roller and the heating roller.

[0020] As a further optimization of the present invention, during the process of adjusting the position of the second motor by the telescopic mechanism, the tension formed by the mounting shell on the connecting plate is detected by the pressure sensor. When the tension is less than the set value, the hydraulic cylinder retracts; when the tension is greater than the set value, the hydraulic cylinder extends. The chain is tensioned by adjusting the position of the mounting bracket.

[0021] As a further optimization of the present invention, the surface linear velocity difference between the heating roller and the first rubber roller is 3 to 6 m / min.

[0022] The beneficial effects of this invention are as follows:

[0023] 1) The heating roller of the present invention is made of high-polish chrome-plated metal, and the calendering roller body on the upper and lower sides of the heating roller is made of high-temperature resistant rubber. The nylon fabric passes through the gap between the heating roller and the two rubber rollers from both sides of the frame. The nylon fabric is calendered by the high-polish chrome-plated metal heating roller in conjunction with the two high-temperature resistant rubber rollers. Compared with the use of other metal heating rollers and nylon rollers, the use of chrome-plated metal heating rollers and rubber rollers for calendering can improve the gloss and tensile strength of the fabric, make the fabric thinner and lighter, make the hand feel more comfortable, make the gloss effect better, and make the anti-down leakage effect better.

[0024] 2) The heating roller of the present invention can simultaneously work with the first rubber roller and the second rubber roller to calender the nylon fabric in the gap between the two, thereby improving work efficiency. When there is a speed difference between the heating roller and the two rubber rollers, the gloss index and tensile strength of the mirror nylon fabric can be improved. The surface linear velocity difference between the heating roller and the rubber roller is 3 to 6 m / min. At this time, the gloss and tensile properties of the nylon fabric can be significantly improved. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the calendering device of the present invention;

[0026] Figure 2 This is a schematic diagram of the overall structure of the drive component of the present invention;

[0027] Figure 3 This is a schematic diagram of the internal structure of the drive component of the present invention;

[0028] Figure 4 This is a schematic diagram of the internal structure of the telescopic mechanism of the present invention.

[0029] In the diagram: 1. Frame; 2. Feeding device; 3. Fabric feeding device; 4. Heating roller; 5. First rubber roller; 6. Second rubber roller; 7. Guide roller; 8. First lifting device; 9. First positioning frame; 10. Second lifting device; 11. Second positioning frame; 12. First motor; 13. Second motor; 14. First sprocket; 15. Second sprocket; 16. Third sprocket; 17. Mounting frame; 18. Telescopic mechanism; 1801. Hydraulic cylinder; 1802. Mounting housing; 1803. Pressure sensor; 1804. Connecting plate; F. Nylon fabric. Detailed Implementation

[0030] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0031] Example 1

[0032] like Figure 1-4As shown, a calendering device for producing mirror-finish nylon fabric includes a frame 1 and an advancing device 2 and a fabric exiting device 3 respectively located on both sides of the frame 1. Three calendering rollers are arranged between the advancing device 2 and the fabric exiting device 3. Each calendering roller consists of a chrome-plated metal heating roller 4 and two rubber rollers 5 and 6 located on the upper and lower sides of the heating roller 4, respectively. Several guide rollers 7 are also provided between the advancing device 2 and the fabric exiting device 3 to guide the nylon fabric F into the gap between the chrome-plated metal heating roller 4 and the first rubber roller 5 and the second rubber roller 6. The nylon fabric F is first guided from the top right side of the first lifting device 8 to the left side of the first lifting device 8, then descends vertically to the left side of the gap between the heating roller 4 and the first rubber roller 5. The nylon fabric F passes through the gap between the heating roller 4 and the first rubber roller 5 and reaches the right side of the gap. Then, the nylon fabric F descends vertically to the gap between the heating roller 4 and the second rubber roller 6. The nylon fabric F passes through the two gaps from both sides of the heating roller 4. The rollers of the first rubber roller 5 and the second rubber roller 6 are made of carbon steel and the roller bodies of the first rubber roller 5 and the second rubber roller 6 are made of resin-cured butyl rubber, which has high temperature resistance. The chrome-plated metal heating roller 4 is made of high-polish chrome-plated stainless steel with a polishing degree of not less than 14. The nylon fabric F passes through the two gaps from both sides of the heating roller 4. The high-polish chrome-plated metal heating roller 4, together with the two high-temperature resistant rubber rollers 5 and 6, calenders the nylon fabric F, making the fabric thinner, more comfortable to the touch, better gloss, and better down-proof. The heating roller 4 can simultaneously work with the first rubber roller 5 and the second rubber roller 6 to calender the nylon fabric F in the two gaps, improving work efficiency.

[0033] Furthermore, such as Figure 2 As shown, a first lifting device 8 is fixedly mounted on the top of the frame 1, and a first positioning frame 9 is fixedly mounted on the output end of the first lifting device 8. The first rubber roller 5 is rotatably mounted inside the first positioning frame 9. A second lifting device 10 is fixedly mounted on the bottom of the frame 1, and a second positioning frame 11 is fixedly mounted on the output end of the second lifting device 10. The second rubber roller 6 is rotatably mounted inside the second positioning frame 11. The first positioning frame 9 and the second positioning frame 11 are both vertically slidably mounted on the side wall of the frame 1. Vertical grooves corresponding to the first positioning frame 9 and the second positioning frame 11 are provided on the side wall of the frame 1. The frame 1 guides the first rubber roller 5 and the second rubber roller 6 through the first positioning frame 9 and the second positioning frame 11.

[0034] Furthermore, such as Figure 2 and Figure 3As shown, a first motor 12 is fixedly mounted on the frame 1. One end of the heating roller 4 is fixedly mounted on the output end of the first motor 12, and the other end of the heating roller 4 is rotatably mounted on the side wall of the frame 1. A second motor 13 is provided on one side of the first motor 12 and is fixed to the frame 1. Specifically, the front side of the frame 1 has a mounting platform on which both the first motor 12 and the second motor 13 are fixedly mounted. A first sprocket 14 is fixedly mounted on the output end of the second motor 13. A second sprocket 15 is fixedly mounted on one end of the first rubber roller 5 and one end of the second rubber roller 6. The other ends of the first rubber roller 5 and the second rubber roller 6 are rotatably connected to the side wall of the frame 1. The first sprocket 14 is connected to the two second sprockets 15 by a chain. A third sprocket 16 for tensioning the chain is provided between the two second sprockets 15 and the first sprocket 14. The third sprocket 16 is rotatably mounted on the side wall of the frame 1. The second motor 13 is fixed inside the mounting frame 17. The frame 1 is provided with a telescopic mechanism 18 for driving the mounting frame 17 to slide laterally on the frame 1. The telescopic mechanism 18 cooperates with the third sprocket 16 to tension the chain.

[0035] Specifically, such as Figure 3 and Figure 4 As shown, the telescopic mechanism 18 includes a hydraulic cylinder 1801 located on one side of the mounting frame 17 and fixed together with the frame 1, and a mounting shell 1802 fixed to the output end of the hydraulic cylinder 1801. A pressure sensor 1803 is fixed inside the mounting shell 1802 on the side away from the hydraulic cylinder 1801. A U-shaped connecting plate 1804 is fixed at the end of the pressure sensor 1803 away from the mounting frame 17. The connecting plate 1804 passes through the mounting shell 1802, and both ends of the connecting plate 1804 are bent toward the mounting frame 17 and fixed to the front and rear sides of the mounting frame 17 respectively. The pressure sensor 1803 is used to collect the tension formed by the mounting shell 1802 on the connecting plate 1804. The pressure sensor 1803 is connected to the controller in a wired or wireless manner and transmits the information it collects to the controller. When the controller determines that the tension is less than the set value, the hydraulic cylinder 1801 retracts; when the tension is greater than the set value, the hydraulic cylinder 1801 extends. The chain is tensioned by adjusting the position of the mounting frame 17. In addition, the first lifting device 8 has the same structure as the telescopic mechanism 18. The second lifting device 10 includes a telescopic component for driving the second positioning frame 11 and another pressure sensor fixed between the telescopic component and the second positioning frame 11. The telescopic component can be an electric cylinder, a hydraulic cylinder, or a pneumatic cylinder. During the calendering process, the first lifting device 8 and the second lifting device 10 can detect the load at their respective output ends and fine-tune the gap between the heating roller 4 and the first rubber roller 5 and the second rubber roller 6 to keep the pressure value on the nylon fabric constant. At the same time, the telescopic mechanism 18 can synchronously tension the chain to improve the calendering effect of the calendering device.

[0036] A method for calendering mirror-finish nylon fabric includes the following steps:

[0037] S1, Height Adjustment

[0038] Based on the thickness of the nylon fabric F, the height of the first positioning frame 9 and the first rubber roller 5 are adjusted by the first lifting device 8, and the height of the second positioning frame 11 and the second rubber roller 6 are adjusted by the second lifting device 10, so that the first rubber roller 5 and the second rubber roller 6 form two gaps with the heating roller 4 that match the nylon fabric F. During the adjustment of the height of the first rubber roller 5 and the second rubber roller 6, the position of the mounting frame 17, the second motor 13, and the first sprocket 14 are adjusted by the telescopic mechanism 18 to cooperate with the second sprocket 15 to tension the chain. During the adjustment of the position of the second motor 13 by the telescopic mechanism 18, the tension force formed by the mounting shell 1802 on the connecting plate 1804 is detected by the pressure sensor 1803. When the tension force is less than the set value, the hydraulic cylinder 1801 retracts; when the tension force is greater than the set value, the hydraulic cylinder 1801 extends. The chain is tensioned by adjusting the position of the mounting frame 17.

[0039] S2, Fabric conveying

[0040] The advancing device 2 feeds nylon fabric F from one side of the frame 1 to the chrome-plated metal heating roller 4. Several guide rollers 7 guide the nylon fabric F fed by the advancing device 2, so that the nylon fabric F passes through the gap between the heating roller 4 and the first rubber roller 5 from one side of the heating roller 4. Then, the nylon fabric F is turned 180° and passes through the gap between the heating roller 4 and the second rubber roller 6 to form a secondary calendered fabric. The fabric output device 3 outputs the secondary calendered fabric from the calendering device.

[0041] S3, Differential Pressing

[0042] The heating roller 4 is driven to rotate by the first motor 12, and the first sprocket 14 is driven to rotate by the second motor 13. The first sprocket 14, together with the chain and two third sprockets 16, drives two second sprockets 15 to rotate, so that the first rubber roller 5 and the second rubber roller 6 rotate at the same speed, and there is a speed difference between the first rubber roller 5 and the second rubber roller 6 and the heating roller 4. The surface linear velocity of the heating roller 4 is 30 m / min, the surface linear velocity of the first rubber roller 5 and the second rubber roller 6 is 33 m / min, and the difference in surface linear velocity between the heating roller 4 and the first rubber roller 5 is 3 m / min.

[0043] Gloss test:

[0044] A secondary calendered fabric was prepared using the aforementioned calendering method for mirror-finish nylon fabric. A section of this secondary calendered fabric was selected as the nylon fabric to be tested. Five test points were selected along the central axis of the nylon fabric to be tested, with each test point spaced 10 cm apart. The gloss was measured at each test point using a gloss meter with a light source incident angle of 20°. The gloss at the five test points was obtained, and the average gloss at the five test points was recorded as the gloss index.

[0045] Tensile test:

[0046] The nylon fabric to be tested in the gloss test was cut to obtain a nylon fabric sample with a length of 50 mm and a width of 5 mm. The two ends of the nylon fabric sample along its length were fixed to the two clamps of the tensile testing machine. The tensile testing machine was started, and the nylon fabric sample was subjected to a tensile test at a given elongation rate of 1 mm / min. The tensile strength of the nylon fabric sample was measured.

[0047] Example 2

[0048] This invention provides a method for calendering mirror nylon fabric. The difference between this embodiment and Embodiment 1 is that in the differential calendering step, the surface linear velocity of the heating roller 4 is 30 m / min, the surface linear velocity of the first rubber roller 5 and the second rubber roller 6 is 34 m / min, and the difference in surface linear velocity between the heating roller 4 and the first rubber roller 5 is 4 m / min. The remaining steps remain unchanged.

[0049] A secondary calendered fabric was prepared according to the above-described mirror-finish nylon fabric calendering method. A section of the secondary calendered fabric was cut as the nylon fabric to be tested, and its gloss was measured. The nylon fabric to be tested was then cut to obtain a nylon fabric sample with the same dimensions as in Example 1. A tensile test was performed on the nylon fabric sample, and its tensile strength was measured.

[0050] Example 3

[0051] This invention provides a method for calendering mirror nylon fabric. The difference between this embodiment and Embodiment 1 is that in the differential calendering step, the surface linear velocity of the heating roller 4 is 30 m / min, the surface linear velocity of the first rubber roller 5 and the second rubber roller 6 is 35 m / min, and the difference in surface linear velocity between the heating roller 4 and the first rubber roller 5 is 5 m / min. The remaining steps remain unchanged.

[0052] A secondary calendered fabric was prepared according to the above-described mirror-finish nylon fabric calendering method. A section of the secondary calendered fabric was cut as the nylon fabric to be tested, and its gloss was measured. The nylon fabric to be tested was then cut to obtain a nylon fabric sample with the same dimensions as in Example 1. A tensile test was performed on the nylon fabric sample, and its tensile strength was measured.

[0053] Example 4

[0054] This invention provides a method for calendering mirror nylon fabric. The difference between this embodiment and Embodiment 1 is that in the differential calendering step, the surface linear velocity of the heating roller 4 is 30 m / min, the surface linear velocity of the first rubber roller 5 and the second rubber roller 6 is 36 m / min, and the difference in surface linear velocity between the heating roller 4 and the first rubber roller 5 is 6 m / min. The remaining steps remain unchanged.

[0055] A secondary calendered fabric was prepared according to the above-described mirror-finish nylon fabric calendering method. A section of the secondary calendered fabric was cut as the nylon fabric to be tested, and its gloss was measured. The nylon fabric to be tested was then cut to obtain a nylon fabric sample with the same dimensions as in Example 1. A tensile test was performed on the nylon fabric sample, and its tensile strength was measured.

[0056] Comparative Example 1

[0057] This invention provides a method for calendering mirror nylon fabric. The difference between this embodiment and Embodiment 1 is that in the differential calendering step, the surface linear velocity of the heating roller 4 is 30 m / min, the surface linear velocity of the first rubber roller 5 and the second rubber roller 6 is 30 m / min, and the difference in surface linear velocity between the heating roller 4 and the first rubber roller 5 is 0, that is, the three calendering rollers rotate at the same speed, and the other steps remain unchanged.

[0058] A secondary calendered fabric was prepared according to the above-described mirror-finish nylon fabric calendering method. A section of the secondary calendered fabric was cut as the nylon fabric to be tested, and its gloss was measured. The nylon fabric to be tested was then cut to obtain a nylon fabric sample with the same dimensions as in Example 1. A tensile test was performed on the nylon fabric sample, and its tensile strength was measured.

[0059] Comparative Example 2

[0060] This invention provides a method for calendering mirror nylon fabric. The difference between this embodiment and Embodiment 1 is that in the differential calendering step, the surface linear velocity of the heating roller 4 is 30 m / min, the surface linear velocity of the first rubber roller 5 and the second rubber roller 6 is 31 m / min, and the difference between the surface linear velocities of the heating roller 4 and the first rubber roller 5 is 1 m / min. The remaining steps remain unchanged.

[0061] A secondary calendered fabric was prepared according to the above-described mirror-finish nylon fabric calendering method. A section of the secondary calendered fabric was cut as the nylon fabric to be tested, and its gloss was measured. The nylon fabric to be tested was then cut to obtain a nylon fabric sample with the same dimensions as in Example 1. A tensile test was performed on the nylon fabric sample, and its tensile strength was measured.

[0062] Comparative Example 3

[0063] This invention provides a method for calendering mirror nylon fabric. The difference between this embodiment and Embodiment 1 is that in the differential calendering step, the surface linear velocity of the heating roller 4 is 30 m / min, the surface linear velocity of the first rubber roller 5 and the second rubber roller 6 is 32 m / min, and the difference in surface linear velocity between the heating roller 4 and the first rubber roller 5 is 2 m / min. The remaining steps remain unchanged.

[0064] A secondary calendered fabric was prepared according to the above-described mirror-finish nylon fabric calendering method. A section of the secondary calendered fabric was cut as the nylon fabric to be tested, and its gloss was measured. The nylon fabric to be tested was then cut to obtain a nylon fabric sample with the same dimensions as in Example 1. A tensile test was performed on the nylon fabric sample, and its tensile strength was measured.

[0065] Comparative Example 4

[0066] This invention provides a method for calendering mirror nylon fabric. The difference between this embodiment and Embodiment 1 is that in the differential calendering step, the surface linear velocity of the heating roller 4 is 30 m / min, the surface linear velocity of the first rubber roller 5 and the second rubber roller 6 is 37 m / min, and the difference in surface linear velocity between the heating roller 4 and the first rubber roller 5 is 7 m / min. The remaining steps remain unchanged.

[0067] A secondary calendered fabric was prepared according to the above-described mirror-finish nylon fabric calendering method. A section of the secondary calendered fabric was cut as the nylon fabric to be tested, and its gloss was measured. The nylon fabric to be tested was then cut to obtain a nylon fabric sample with the same dimensions as in Example 1. A tensile test was performed on the nylon fabric sample, and its tensile strength was measured.

[0068] Comparative Example 5

[0069] This invention provides a method for calendering mirror nylon fabric. The difference between this embodiment and Embodiment 1 is that the two rubber rollers 5 and 6 used in the method for calendering mirror nylon fabric are replaced with nylon rollers. The surface linear velocity of the heating roller 4 and the two nylon rollers is 30 m / min. The remaining steps remain unchanged.

[0070] A secondary calendered fabric was prepared according to the above-described mirror-finish nylon fabric calendering method. A section of the secondary calendered fabric was cut as the nylon fabric to be tested, and its gloss was measured. The nylon fabric to be tested was then cut to obtain a nylon fabric sample with the same dimensions as in Example 1. A tensile test was performed on the nylon fabric sample, and its tensile strength was measured.

[0071] Comparative Example 6

[0072] This invention provides a method for calendering mirror nylon fabric. The difference between this embodiment and Embodiment 1 is that the chrome-plated stainless steel heating roller 4 used in the calendering method of mirror nylon fabric is replaced with a galvanized stainless steel heating roller. The surface linear speed of the galvanized stainless steel heating roller and the two rubber rollers 5 and 6 is 30 m / min. The remaining steps remain unchanged.

[0073] Comparative Example 7

[0074] This invention provides a method for calendering mirror nylon fabric. The difference between this embodiment and Embodiment 1 is that the chrome-plated stainless steel heating roller 4 used in the calendering method of mirror nylon fabric is replaced with an indium-plated stainless steel heating roller. The surface linear speed of the indium-plated stainless steel heating roller and the two rubber rollers 5 and 6 is 30 m / min. The remaining steps remain unchanged.

[0075] Comparative Example 8

[0076] This invention provides a method for calendering mirror nylon fabric. The difference between this embodiment and Embodiment 1 is that the chrome-plated stainless steel heating roller 4 used in the calendering method of mirror nylon fabric is replaced with a tin-plated stainless steel heating roller. The surface linear speed of the tin-plated stainless steel heating roller and the two rubber rollers 5 and 6 is 30 m / min. The remaining steps remain unchanged.

[0077] A secondary calendered fabric was prepared according to the above-described mirror-finish nylon fabric calendering method. A section of the secondary calendered fabric was cut as the nylon fabric to be tested, and its gloss was measured. The nylon fabric to be tested was then cut to obtain a nylon fabric sample with the same dimensions as in Example 1. A tensile test was performed on the nylon fabric sample, and its tensile strength was measured.

[0078] Table 1 Correspondence between Glossiness Test and Tensile Test

[0079]

[0080]

[0081] In Comparative Examples 1 and 5-8, the surface linear velocity of the three calendering rollers was 30 m / min. The speed difference between the calendering roller in the middle position and the calendering rollers on the top and bottom sides was 0, even though the materials of the calendering rollers were different. Table 1 shows that in Comparative Example 5, replacing the two rubber rollers 5 and 6 with two nylon rollers significantly reduced the gloss and tensile strength compared to Comparative Example 1. The calendering roller in the middle position of Comparative Example 1, i.e., the heating roller 4, was made of chrome-plated stainless steel, while the heating rollers in Comparative Examples 6-8 were made of zinc-plated stainless steel, indium-plated stainless steel, and tin-plated stainless steel, respectively. The gloss and tensile strength of Comparative Examples 6-8 were also significantly lower than those of Comparative Example 1. Therefore, using rubber rollers as soft rollers and chrome-plated stainless steel rollers as heating rollers can improve the gloss and tensile strength of nylon fabrics.

[0082] Compared with Comparative Examples 2-4 and Examples 1-4, Comparative Example 1 showed lower gloss and tensile strength. This indicates that a speed difference between the chrome-plated heating roller 4 and the first rubber roller 5 and the second rubber roller 6 can effectively improve the gloss and tensile properties of the nylon fabric. Specifically, Examples 1-4 and Comparative Example 4 showed a significant improvement in gloss compared to Comparative Examples 2 and 3, while Comparative Example 4 exhibited poorer tensile strength compared to Examples 1-4. In summary, when the surface linear velocity difference between the heating roller 4 and the rubber rollers 5 and 6 is 3-6 m / min, the nylon fabric exhibits better gloss and tensile properties. Using the chrome-plated heating roller 4 and the rubber rollers 5 and 6 to calender the nylon fabric can significantly improve its gloss and tensile properties, extend its service life, and result in a thinner, more comfortable fabric with better down-proof properties.

[0083] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A calendering apparatus for producing mirror-finish nylon fabric, comprising a frame (1) and a feeding device (2) and a fabric output device (3) respectively disposed on both sides of the frame (1), characterized in that: A chrome-plated metal heating roller (4) is provided between the advancing device (2) and the fabric output device (3). A first rubber roller (5) and a second rubber roller (6) are provided on the upper and lower sides of the heating roller (4). Several guide rollers (7) are also provided between the advancing device (2) and the fabric output device (3) to guide the nylon fabric into the gap between the chrome-plated metal heating roller (4) and the first rubber roller (5) and the second rubber roller (6). The nylon fabric passes through the two gaps from both sides of the heating roller (4) in sequence. The top of the frame (1) is fixedly provided with a first lifting device (8), the output end of the first lifting device (8) is fixedly provided with a first positioning frame (9), the first rubber roller (5) is rotatably located inside the first positioning frame (9), the bottom of the frame (1) is fixedly provided with a second lifting device (10), the output end of the second lifting device (10) is fixedly provided with a second positioning frame (11), and the second rubber roller (6) is rotatably located inside the second positioning frame (11); The first motor (12) is fixed on the frame (1), one end of the heating roller (4) is fixed to the output end of the first motor (12), and the other end of the heating roller (4) is rotatably mounted on the side wall of the frame (1); A second motor (13) is fixed to the frame (1) on one side of the first motor (12). A first sprocket (14) is fixed at the output end of the second motor (13). A second sprocket (15) is fixed at one end of the first rubber roller (5) and one end of the second rubber roller (6). The other end of the first rubber roller (5) and the other end of the second rubber roller (6) are rotatably connected to the side wall of the frame (1). The first sprocket (14) is connected to the two second sprockets (15) by a chain. A third sprocket (16) for tensioning the chain is provided between the two second sprockets (15) and the first sprocket (14). The third sprocket (16) is rotatably mounted on the side wall of the frame (1). The heating roller (4) is driven to rotate by the first motor (12), and the first sprocket (14) is driven to rotate by the second motor (13). The first sprocket (14) works with the chain and two third sprockets (16) to drive two second sprockets (15) to rotate, so that the first rubber roller (5) and the second rubber roller (6) rotate at the same speed. There is a speed difference between the first rubber roller (5), the second rubber roller (6) and the heating roller (4). The surface linear velocity difference between the heating roller (4) and the first rubber roller (5) is 3 to 6 m / min, so as to improve the gloss and tensile strength of the nylon fabric.

2. The calendering apparatus according to claim 1, characterized in that: The first positioning frame (9) and the second positioning frame (11) are both vertically slidably mounted on the side wall of the frame (1).

3. The calendering apparatus according to claim 1, characterized in that: The second motor (13) is fixed to the inside of the mounting bracket (17), and the frame (1) is provided with a telescopic mechanism (18) for driving the mounting bracket (17) to slide laterally on the frame (1).

4. The calendering apparatus according to claim 3, characterized in that: The telescopic mechanism (18) includes a hydraulic cylinder (1801) located on one side of the mounting frame (17) and fixed together with the frame (1) and a mounting shell (1802) fixed at the output end of the hydraulic cylinder (1801). A pressure sensor (1803) is fixed inside the mounting shell (1802) on the side away from the hydraulic cylinder (1801). A connecting plate (1804) is fixed at the end of the pressure sensor (1803) away from the mounting frame (17). The connecting plate (1804) penetrates the mounting shell (1802), and the two ends of the connecting plate (1804) are respectively fixed on the front and rear sides of the mounting frame (17).

5. A method for calendering mirror-finish nylon fabric, characterized in that: The calendering apparatus according to claim 4 is used in the following steps: S1, Height Adjustment According to the thickness of the nylon fabric, the height of the first positioning frame (9) and the first rubber roller (5) is adjusted by the first lifting device (8), and the height of the second positioning frame (11) and the second rubber roller (6) is adjusted by the second lifting device (10), so that the first rubber roller (5) and the second rubber roller (6) form two gaps that match the nylon fabric with the heating roller (4). During the process of adjusting the height of the first rubber roller (5) and the second rubber roller (6), the position of the mounting frame (17), the second motor (13) and the first sprocket (14) are adjusted by the telescopic mechanism (18) to cooperate with the second sprocket (15) to tension the chain. S2, Fabric conveying The advancing device (2) feeds nylon fabric from one side of the frame (1) to the chrome-plated metal heating roller (4). Several guide rollers (7) guide the nylon fabric fed by the advancing device (2) so that the nylon fabric passes through the gap between the heating roller (4) and the first rubber roller (5) from one side of the heating roller (4). Then the nylon fabric is turned 180° and passes through the gap between the heating roller (4) and the second rubber roller (6) to form a secondary calendered fabric. The fabric output device (3) outputs the secondary calendered fabric from the calendering device. S3, Differential Pressing The heating roller (4) is driven to rotate by the first motor (12), and the first sprocket (14) is driven to rotate by the second motor (13). The first sprocket (14) works with the chain and two third sprockets (16) to drive two second sprockets (15) to rotate, so that the first rubber roller (5) and the second rubber roller (6) rotate at the same speed, and there is a speed difference between the first rubber roller (5), the second rubber roller (6) and the heating roller (4).

6. The method for calendering mirror-finish nylon fabric according to claim 5, characterized in that: During the process of adjusting the position of the second motor (13) by the telescopic mechanism (18), the tension formed by the mounting shell (1802) on the connecting plate (1804) is detected by the pressure sensor (1803). When the tension is less than the set value, the cylinder (1801) retracts. When the tension is greater than the set value, the cylinder (1801) extends. The chain is tensioned by adjusting the position of the mounting bracket (17).

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