Flash non-woven fabric uniformity detection equipment, method and production line

Abstract

The invention provides flash non-woven fabric uniformity detection equipment, a flash non-woven fabric uniformity detection method and a flash non-woven fabric uniformity detection production line, the flash non-woven fabric uniformity detection equipment comprises a conveyor used for driving flash non-woven fabric to move along a first direction and a laser measurement module used for measuring the width of the flash non-woven fabric, and the width direction of the flash non-woven fabric is parallel to a second direction. The linear distance between the end faces of the two sides of the flash non-woven fabric and the inner walls of the two sides of the conveyor is adjusted, the light source module is used for emitting light rays to irradiate the upper surface of the flash non-woven fabric, the light intensity induction module is used for receiving the light intensity of the lower surface of the flash non-woven fabric, and the light intensity induction module is arranged on the connecting rod assembly. The connecting rod assembly is used for adjusting the detection width of the light intensity sensing module in the second direction to correspond to the width of the flash non-woven fabric. The flash non-woven fabric uniformity detection device has the beneficial effects that in the production process, the uniformity of the flash non-woven fabric is detected, raw material waste caused by production of a large number of defective products is avoided, and the flash non-woven fabric uniformity detection device is suitable for uniformity detection of flash non-woven fabrics with different widths, has universality and is relatively high in detection efficiency.

Description

Technical Field

[0001] The present invention relates to the field of flash-steamed nonwoven fabric detection, and in particular to a flash-steamed nonwoven fabric uniformity detection device, method and production line. Background Art

[0002] In the prior art, in order to facilitate the detection of the uniformity of non-woven fabrics, it is generally necessary to sample and test the non-woven fabrics after the production is completed. This detection method has a certain delay. Since it is impossible to detect whether the uniformity of the non-woven fabrics is qualified during the production process, when defective products appear, it is impossible to shut down for maintenance in time, resulting in the production of a large number of defective products, causing a waste of raw materials and an increase in production costs. At the same time, most of the existing detection equipment can only detect the uniformity of non-woven fabrics of the same width, and cannot be applied to the uniformity detection of non-woven fabrics of different widths. The versatility is poor and the detection efficiency is low.

[0003] At present, in the field of flash spinning, the uniformity detection of the flash non-woven fabric production process also faces the above problems. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In order to solve the above problems in the prior art, the present invention provides a flash-steamed nonwoven fabric uniformity detection device, method and production line.

[0006] (II) Technical solution

[0007] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0008] A flash nonwoven fabric uniformity detection device, comprising:

[0009] The conveyor is used for driving the flash-steamed non-woven fabric to move along a first direction, wherein the width direction of the flash-steamed non-woven fabric is parallel to the second direction, and the first direction and the second direction are perpendicular.

[0010] The laser measurement module is arranged above the flash steamed non-woven fabric and is used to measure the width of the flash steamed non-woven fabric and the straight-line distance from the two side end surfaces of the flash steamed non-woven fabric to the two side inner walls of the conveyor.

[0011] The light source module is arranged above the flash-steamed non-woven fabric and is used for emitting light to illuminate the upper surface of the flash-steamed non-woven fabric.

[0012] The light intensity sensing module is used to receive the light intensity on the lower surface of the flash steamed non-woven fabric, and measure the light transmittance of the flash steamed non-woven fabric within the detection range of the light intensity sensing module.

[0013] The connecting rod assembly is arranged below the flash steamed non-woven fabric, and the light intensity sensing module is arranged on the connecting rod assembly. The connecting rod assembly is used to adjust the detection width of the light intensity sensing module in the second direction to correspond to the width of the flash steamed non-woven fabric.

[0014] Among them, within the detection range of the light intensity sensing module, the real-time light transmittance of the flash-steamed non-woven fabric is measured and compared with the preset light transmittance of the flash-steamed non-woven fabric.

[0015] Preferably, the laser measurement module includes a linear laser and a camera arranged above the conveyor, the linear laser and the camera are arranged at intervals along the first direction, the linear laser emits a linear light spot projected onto the upper surface of the flash-steamed non-woven fabric, and the linear light spot extends along the second direction.

[0016] Preferably, the connecting rod assembly includes a first driving unit, a second driving unit and a four-linking unit. The first driving unit and the second driving unit are arranged relatively to the conveyor. The light intensity sensing module is arranged on the four-linking unit. The four-linking unit includes a first hinge part and a second hinge part arranged along the second direction. The first hinge part is connected to the output end of the first driving unit, and the second hinge part is connected to the output end of the second driving unit. When the first driving unit and the second driving unit are working, they can drive the first hinge part and the second hinge part to move toward or away from each other along the second direction.

[0017] Preferably, the four-link unit comprises a first link, a second link, a slide, and a linear guide rail, wherein the linear guide rail is arranged on the conveyor and arranged along a first direction, the first link and the second link are arranged opposite to each other along a second direction, and the slide is hinged at both ends of the first link and the second link, the slide is fixedly connected to the slider on the linear guide rail, a first hinge portion is provided in the middle of the first link, and a second hinge portion is provided in the middle of the second link.

[0018] The first driving unit and the second driving unit are in operation to drive the first hinged portion and the second hinged portion to move toward or away from each other along the second direction.

[0019] Preferably, it also includes a dark box, which is arranged on the conveying path of the conveyor, the light source module is arranged in the dark box, and the light intensity sensing module is arranged below the flash steamed non-woven fabric and directly opposite to the light source module.

[0020] Preferably, two side walls of the dark box that are arranged opposite to each other along the second direction are provided with a shading assembly, which includes a stepping motor and a shading plate. The upper end of the shading plate is hinged to the side wall of the dark box and is set at a preset angle α, and the other end is hinged to the output end of the stepping motor.

[0021] Preferably, the conveyor is a roller conveyor, and the roller conveyor is also provided with a cloth pressing assembly, and the cloth pressing assembly is arranged above the flash-steamed non-woven fabric.

[0022] Preferably, the light source module comprises a substrate and LED lamps, the LED lamps are arranged on the substrate at intervals along the first direction and the second direction, the width of the conveyor is W1, the width of the substrate is W2, and W1-W2≤5mm.

[0023] The present invention provides a flash nonwoven fabric production line, based on the above-mentioned flash nonwoven fabric uniformity detection equipment, further comprising a feeding device, a spinning device, a fiber opening device, a web laying device, a calendering device and a winding device, wherein the feeding device, the spinning device, the fiber opening device, the web laying device and the calendering device are sequentially arranged at the feeding end of the conveyor, and the winding device is arranged at the discharging end of the conveyor.

[0024] Among them, the feeding device is used to convey the spinning liquid, the spinning device is used to spin the spinning liquid to form fibers, which are then formed into a fiber web through a fiber opening device, and the multi-layer fiber web is stacked by a web laying device to form a composite fiber web, which is then processed by a calendering device to form a flash non-woven fabric, which is then inspected by a flash non-woven fabric uniformity detection device and then conveyed to a winding device for winding.

[0025] The present invention also provides a flash-steamed nonwoven fabric uniformity detection method, based on the above-mentioned flash-steamed nonwoven fabric uniformity detection device, comprising the following steps:

[0026] S1. Measure the width W of the flash-steamed nonwoven fabric, and the straight-line distances L1 and L2 from the two side end surfaces of the flash-steamed nonwoven fabric to the inner walls on both sides of the conveyor.

[0027] S2. According to the straight-line distances L1 and L2, adjust the detection width of the light intensity sensing module in the second direction to be greater than or equal to W.

[0028] S3. Emit light to irradiate the upper surface of the flash-steamed nonwoven fabric.

[0029] S4. Measure the light transmittance of the flash-steamed nonwoven fabric, and obtain the standard dynamic range of the flash-steamed nonwoven fabric according to the measured light transmittance.

[0030] S5. Determine whether more than 90% of the transmittance data is within the pre-standard dynamic range.

[0031] (III) Beneficial effects

[0032] The beneficial effects of the present invention are as follows: by adopting the above technical scheme, the upper surface of the flash steamed non-woven fabric is irradiated by the light source module, and a light intensity sensing module is arranged on the lower surface of the flash steamed non-woven fabric, and a conveyor is provided, which can directly form a production line combination of the flash steamed non-woven fabric. During the production process, the standard dynamic range of the flash steamed non-woven fabric is determined by the measured transmittance. If more than 90% of the measured transmittance data is within the standard dynamic range, it indicates that the flash steamed non-woven fabric has good uniformity. Otherwise, it indicates that the flash steamed non-woven fabric has poor uniformity. When defective products appear, the machine can be quickly shut down for maintenance to avoid producing a large number of defective products and causing waste of raw materials. A laser measurement module and a connecting rod assembly are provided. The connecting rod assembly is used to adjust the detection width of the light intensity sensing module in the second direction to correspond to the width of the flash steamed non-woven fabric. It can be applied to the uniformity detection of flash steamed non-woven fabrics of different widths, has universality, and has high detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of a flash nonwoven fabric uniformity detection device.

[0034] Figure 2 It is a top view of a flash-steamed nonwoven fabric uniformity detection device.

[0035] Figure 3 The present invention is a schematic diagram of the structure of a connecting rod assembly of a flash nonwoven fabric uniformity detection device.

[0036] Figure 4 The figure is a top view of a connecting rod assembly of a flash nonwoven fabric uniformity detection device.

[0037] Figure 5 The present invention is a reference diagram of the use status of a connecting rod assembly of a flash nonwoven fabric uniformity detection device.

[0038] Figure 6 The present invention is a cross-sectional view of a dark box of a flash nonwoven fabric uniformity detection device.

[0039] Figure 7 The cross-sectional view of a dark box of a flash nonwoven fabric uniformity detection device from another perspective.

[0040] [Description of Reference Numerals]

[0041] 1. Conveyor, 11. First detection benchmark, 12. Second detection benchmark.

[0042] 2. Laser measurement module, 21. One-line laser, 22. Camera.

[0043] 3. Light source module, 31. Substrate, 32. LED lamp.

[0044] 4. Connecting rod assembly, 41. First driving unit, 42. Second driving unit, 43. Four-link unit, 431. First connecting rod member, 4311. First hinge part, 432. Second connecting rod member, 4321. Second hinge part, 433. Slide plate, 434. Linear guide rail.

[0045] 5. Light intensity sensing module.

[0046] 6. Dark box.

[0047] 7. Shading assembly, 71. Stepping motor, 72. Shading plate.

[0048] 8. cloth pressing assembly, 81. mounting seat, 811. strip groove, 82. rotating drum.

[0049] X, first direction, Y, second direction, a, flash-steamed nonwoven fabric. DETAILED DESCRIPTION

[0050] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0051] See also Figures 1 to 7 The present invention provides a flash nonwoven fabric uniformity detection device, including a conveyor 1, a laser measurement module 2, a light source module 3, a light intensity sensing module 5, and a connecting rod assembly 4. For ease of description, refer to Figure 1 , define the conveying direction of the conveyor 1 as the first direction X, define the width direction of the conveyor 1 as the second direction Y, the first direction X and the second direction Y are perpendicular, when the conveyor 1 conveys the flash steamed non-woven fabric a, the width direction of the flash steamed non-woven fabric a is parallel to the second direction Y, specifically, the laser measurement module 2 is arranged above the flash steamed non-woven fabric, and is used to measure the width of the flash steamed non-woven fabric, and the straight-line distance from the two side end surfaces of the flash steamed non-woven fabric to the two side inner walls of the conveyor 1, the light source module 3 is arranged above the flash steamed non-woven fabric, and is used to emit light to irradiate the upper surface of the flash steamed non-woven fabric. In this embodiment, in order to ensure the uniformity of light irradiation, the light emission direction is vertically downward, and the light intensity sensing module 5 is used to receive the light intensity on the lower surface of the flash steamed non-woven fabric.

[0052] The working principle of the present invention is: the light source module 3 irradiates the upper surface of the flash steamed non-woven fabric, and the light passes through the flash steamed non-woven fabric. The light intensity in a certain area of ​​the lower surface of the flash steamed non-woven fabric is collected, and the light intensity and the light intensity of the light source are processed by parameters, and the transmittance of each place in the detection area is measured, and then the measured transmittance data is processed. If more than 90% of the measured transmittance data is within the standard dynamic range, it indicates that the flash steamed non-woven fabric has good uniformity. Otherwise, it indicates that the flash steamed non-woven fabric has poor uniformity and needs to be shut down for maintenance in time. The uniformity of the flash steamed non-woven fabric is adjusted by repairing the corresponding equipment or adjusting the process parameters of the production equipment.

[0053] Specifically, in order to facilitate the description of the standard dynamic range, the light intensity of the light source module 4 can be adjusted within 0-10000 lux. In a specific embodiment, the light intensity used by the light source module 4 is 4000 lux. When the gram weight of the flash-steamed non-woven fabric detected is between 40g / ㎡ and 49g / ㎡, the corresponding standard dynamic range is ±3% of the average value of the measured transmittance data, that is, the average transmittance of this group of data is 27.51%. If more than 90% of the transmittance data of this group is between 24.51% and 30.51% (standard dynamic range), it indicates that the uniformity of the flash-steamed non-woven fabric is good, otherwise, the uniformity is poor. It should be noted that the flash-steamed non-woven fabrics of different gram weight ranges have different corresponding standard dynamic ranges.

[0054] Since flash-steamed non-woven fabrics of different widths have different detection widths corresponding to their light intensity sensing modules 5, in order to adjust the detection width of the light intensity sensing module 5 so that it always corresponds to the width of the flash-steamed non-woven fabric, a connecting rod assembly 4 is provided, which is arranged under the flash-steamed non-woven fabric, and the light intensity sensing module 5 is arranged on the connecting rod assembly 4. Specifically, the connecting rod assembly 4 is used to adjust the detection width of the light intensity sensing module 5 in the second direction Y to correspond to the width of the flash-steamed non-woven fabric.

[0055] In this embodiment, in order to facilitate the confirmation of the width of the flash-steamed non-woven fabric and to facilitate the subsequent adjustment of the detection width of the light intensity sensing module 5, and at the same time, in order to simplify the structure, in this embodiment, the laser measurement module 2 includes a straight laser 21 and a camera 22 arranged above the conveyor 1, see Figure 1 , Figure 2 The straight laser 21 and the camera 22 are arranged at intervals along the first direction X. The straight laser 21 emits a straight light spot projected on the upper surface of the flash steamed non-woven fabric. The straight light spot extends along the second direction Y. The straight light spot on the upper surface of the flash steamed non-woven fabric is photographed by the camera 22 in real time. The analysis module in the control system processes it to obtain the width of the flash steamed non-woven fabric.

[0056] Furthermore, since the flash-steamed nonwoven fabric is not necessarily arranged in the center of the conveyor 1 when being conveyed on the conveyor 1, that is, the center line of the flash-steamed nonwoven fabric along the first direction X does not coincide with the center line of the conveyor 1 along the first direction X, in order to make the detection width of the light intensity sensing module 5 always correspond to the width of the flash-steamed nonwoven fabric according to the conveying state of the flash-steamed nonwoven fabric on the conveyor 1, in this embodiment, refer to Figure 3 , Figure 4 , Figure 5 The connecting rod assembly 4 includes a first driving unit 41, a second driving unit 42 and a four-linking unit 43, wherein the first driving unit 41 and the second driving unit 42 are relatively arranged on the conveyor 1, and the light intensity sensing module 5 is arranged on the four-linking unit 43. In order to facilitate the adjustment of the detection width, the four-linking unit 43 includes a first hinge part 4311 and a second hinge part 4321 arranged along the second direction Y, wherein the first hinge part 4311 is connected to the output end of the first driving unit 41, and the second hinge part 4321 is connected to the output end of the second driving unit 42. When the first driving unit 41 and the second driving unit 42 work, they can drive the first hinge part 4311 and the second hinge part 4321 to move toward or away from each other along the second direction Y.

[0057] For further information, see Figure 4 In order to facilitate the design of the four-link unit 43, the four-link unit 43 includes a first link member 431, a second link member 432, a slide plate 433, and a linear guide rail 434, wherein the linear guide rail 434 is arranged on the conveyor 1 and arranged along the first direction X, the first link member 431 and the second link are arranged oppositely along the second direction Y, and the slide plate 433 is hinged at both ends of the first link member 431 and the second link member 432, a first hinge portion 4311 is provided in the middle of the first link, and a second hinge portion 4321 is provided in the middle of the second link member 432.

[0058] When the first driving unit 41 and the second driving unit 42 are working, they can drive the first hinge part 4311 and the second hinge part 4321 to move toward or away from each other along the second direction Y, and at the same time drive the slide plate 433 to move along the first direction X. In this embodiment, in order to facilitate accurate control of the movement distance of the first hinge part 4311 and the second hinge part 4321 in the second direction Y, the first driving unit 41 and the second driving unit 42 are both servo motors, and their output shafts are provided with external threads, the first hinge part 4311 and the output shaft of the first driving unit 41 are threadedly connected, and the second hinge part 4321 and the output shaft of the second driving unit 42 are threadedly connected.

[0059] Furthermore, in order to eliminate the influence of external light on uniformity detection, in this embodiment, refer to Figure 1 , Figure 6 , Figure 7, and also includes a dark box 6, wherein the dark box 6 is arranged on the conveying path of the conveyor 1, the light source module 3 is arranged in the dark box 6, and the light intensity sensing module 5 is arranged below the flash steamed non-woven fabric and is arranged opposite to the light source module 3.

[0060] Furthermore, when the width of the flash-steamed non-woven fabric to be detected becomes smaller, the light emitted by the light source module 3 is easy to enter the detection range of the light intensity sensing module 5 from the gap between the conveyor 1 and the two side end surfaces of the flash-steamed non-woven fabric. Therefore, in order to avoid the light emitted by the light source module 3 from affecting the detection of the light intensity sensing module 5, in this embodiment, refer to Figure 7 The two side walls of the dark box 6 which are relatively arranged along the second direction Y are provided with a shading assembly 7, wherein the shading assembly 7 includes a stepping motor 71 and a shading plate 72, the upper end of the shading plate 72 is hinged to the side wall of the dark box 6, and in this embodiment, a hinge is adopted and is set at a preset angle α, and the other end is hinged to the output end of the stepping motor 71, and the preset angle α has a value range of 5°-60°, which can be adjusted according to the width of the flash steamed non-woven fabric to be detected, so as to prevent the light emitted by the light source module 3 from entering the detection range of the light intensity sensing module 5 from the gap between the conveyor 1 and the flash steamed non-woven fabric, so as to prevent the light source module 3 from affecting the light intensity received by the light intensity sensing module 5.

[0061] Furthermore, in order to facilitate the transportation of the flash-steamed nonwoven fabric, in this embodiment, the conveyor 1 is a roller conveyor 1. In order to facilitate the positioning of the flash-steamed nonwoven fabric in the vertical direction, refer to Figure 1 , the roller conveyor 1 is also provided with a cloth pressing assembly 8, which is arranged above the flash-steamed non-woven fabric. Specifically, the cloth pressing assembly 8 includes a mounting seat 81 on the roller conveyor 1 relatively arranged along the second direction Y, a rotating roller 82 is provided between the two mounting seats 81, and the two ends of the rotating roller 82 are connected to the mounting seats 81 by screws. In order to facilitate the adjustment of the gap between the rotating roller 82 and the flash-steamed non-woven fabric, a strip groove 811 is opened on the mounting seat 81.

[0062] Furthermore, in order to facilitate the design of the light source module 3 and simplify the structure, in this embodiment, the light source module 3 includes a substrate 31 and LED lamps 32. The LED lamps 32 are arranged in an array on the substrate 31. Figure 6 , Figure 7 LED lamps 32 are arranged on the substrate 31 at intervals along the first direction X and the second direction Y. In order to ensure that the light emitted by the light source module 3 can always meet the width detection requirements of the flash steamed non-woven fabric on the conveyor 1, that is, it is necessary to ensure that the light emitted by the light source module 3 can always cover the upper surface of the flash steamed non-woven fabric, the width of the conveyor 1 is W1, and the width of the substrate 31 is W2, satisfying W1-W2≤5mm.

[0063] The flash-steamed nonwoven fabric uniformity detection device provided by the present invention can be directly connected to the flash-steamed nonwoven fabric production line to realize the automated production and automatic detection of the flash-steamed nonwoven fabric. Therefore, the present invention also provides a flash-steamed nonwoven fabric production line, including the above-mentioned flash-steamed nonwoven fabric uniformity detection device, and also includes a feeding device, a spinning device, a fiber opening device, a web laying device, a calendering device and a winding device. The feeding device, the spinning device, the fiber opening device and the web laying device are sequentially arranged at the feeding end of the conveyor 1, and the winding device is arranged at the discharging end of the conveyor 1.

[0064] Among them, the feeding device is used to transport the spinning solution, the spinning device is used to spin the spinning solution to form fibers, which are then formed into a fiber web by the fiber opening device, and the multi-layer fiber web is stacked by the web laying device to form a composite fiber web, which is processed by the calendering device to form a flash non-woven fabric, which is then transported to the winding device for winding after uniformity detection by the conveyor 1. When defective products appear, the machine can be stopped for maintenance at any time to avoid producing a large number of defective products and causing waste of raw materials.

[0065] Furthermore, in order to facilitate the detection width of the light intensity sensing module 5 to change with the width of the flash-steamed non-woven fabric, the present invention also provides a flash-steamed non-woven fabric uniformity detection method, based on the above-mentioned flash-steamed non-woven fabric uniformity detection device, comprising the following steps:

[0066] S1. Measure the width W of the flash-steamed nonwoven fabric, and the straight-line distances L1 and L2 from the two side end surfaces of the flash-steamed nonwoven fabric to the inner walls of the two side walls of the conveyor 1.

[0067] S2. According to the straight-line distances L1 and L2, adjust the detection width of the light intensity sensing module 5 in the second direction Y to be greater than or equal to W.

[0068] S3. Emit light to irradiate the upper surface of the flash-steamed nonwoven fabric.

[0069] S4, measuring the light transmittance of the flash-steamed non-woven fabric, and obtaining the standard dynamic range of the flash-steamed non-woven fabric according to the measured light transmittance;

[0070] S5. Determine whether more than 90% of the transmittance data is within the standard dynamic range.

[0071] Among them, in step S1, in order to facilitate the measurement of the straight-line distances L1 and L2 from the two side end surfaces of the flash-steamed non-woven fabric to the inner walls on both sides of the conveyor 1, a first detection reference 11 and a second detection reference 12 are set on the inner side of the conveyor 1. At the same time, the first detection reference 11 and the second detection reference 12 are located on the extension path of the I-shaped light spot. After the camera 22 takes a photo, the corresponding value can be obtained by processing it through the analysis module in the control system.

[0072] Specifically, step S2 is that the control system measures the width W of the flash steamed non-woven fabric, and the specific parameters of the straight-line distances L1 and L2 from the flash steamed non-woven fabric to the two sides of the conveyor 1, controls the corresponding motion parameters of the first drive unit 41 and the second drive unit 42, drives the first hinge part 4311 and the second hinge part 4321 to move toward or away from each other along the second direction Y, so that the detection width of the light intensity sensing module 5 is greater than or equal to W.

[0073] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

[0074] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A flash nonwoven fabric uniformity detection device, characterized in that: include A conveyor, used for driving the flash-steamed nonwoven fabric to move along a first direction, wherein a width direction of the flash-steamed nonwoven fabric is parallel to a second direction, and the first direction is perpendicular to the second direction; A laser measurement module is disposed above the flash-steamed nonwoven fabric and is used to measure the width of the flash-steamed nonwoven fabric and the straight-line distance from the two side end surfaces of the flash-steamed nonwoven fabric to the two side inner walls of the conveyor; A light source module is disposed above the flash-steamed non-woven fabric and is used to emit light to illuminate the upper surface of the flash-steamed non-woven fabric; A light intensity sensing module, used to receive the light intensity on the lower surface of the flash-steamed non-woven fabric, and measure the light transmittance of the flash-steamed non-woven fabric within the detection range of the light intensity sensing module; A connecting rod assembly is arranged below the flash steamed non-woven fabric, and the light intensity sensing module is arranged on the connecting rod assembly; the connecting rod assembly is used to adjust the detection width of the light intensity sensing module in the second direction to correspond to the width of the flash steamed non-woven fabric.

2. The flash nonwoven fabric uniformity detection device according to claim 1 is characterized in that: The laser measurement module includes a straight laser and a camera disposed above the conveyor, wherein the straight laser and the camera are spaced apart along the first direction, and the straight laser emits a straight light spot projected onto the upper surface of the flash-steamed non-woven fabric, and the straight light spot extends along the second direction.

3. The flash nonwoven fabric uniformity detection device according to claim 1 is characterized in that: The connecting rod assembly includes a first driving unit, a second driving unit and a four-bar connecting rod unit. The first driving unit and the second driving unit are relatively arranged on the conveyor. The light intensity sensing module is arranged on the four-bar connecting rod unit. The four-bar connecting rod unit includes a first hinge part and a second hinge part arranged along the second direction. The first hinge part is connected to the output end of the first driving unit, and the second hinge part is connected to the output end of the second driving unit. When the first driving unit and the second driving unit are working, they can drive the first hinge part and the second hinge part to move toward or away from each other along the second direction.

4. The flash nonwoven fabric uniformity detection device according to claim 1, characterized in that: The four-link unit comprises a first link, a second link, a slide, and a linear guide, wherein the linear guide is arranged on the conveyor and arranged along the first direction, the first link and the second link are arranged opposite to each other along the second direction, and both ends of the first link and the second link are hinged with the slide, the slide is fixedly connected to the slider on the linear guide, the first link is provided with the first hinged portion in the middle, and the second link is provided at the second hinged portion in the middle; The first driving unit and the second driving unit can drive the first hinged part and the second hinged part to move toward or away from each other along the second direction when they are in operation.

5. The flash nonwoven fabric uniformity detection device according to claim 1, characterized in that: It also includes a dark box, which is arranged on the conveying path of the conveyor, the light source module is arranged in the dark box, the light intensity sensing module is arranged below the flash-steamed non-woven fabric and directly opposite to the light source module, and light blocking plates are arranged on both sides of the conveyor close to the light intensity sensing module.

6. The flash nonwoven fabric uniformity detection device according to claim 5, characterized in that: The two side walls of the dark box that are arranged opposite to each other along the second direction are provided with a shading assembly, and the shading assembly includes a stepping motor and a shading plate. The upper end of the shading plate is hinged to the side wall of the dark box and is set at a preset angle α, and the other end is hinged to the output end of the stepping motor.

7. The flash nonwoven fabric uniformity detection device according to claim 6, characterized in that: The conveyor is a roller conveyor, and the roller conveyor is also provided with a cloth pressing assembly, and the cloth pressing assembly is arranged above the flash-steamed non-woven fabric.

8. The flash nonwoven fabric uniformity detection device according to claim 1, characterized in that: The light source module includes a substrate and LED lamps. The LED lamps are arranged on the substrate at intervals along the first direction and the second direction. The width of the conveyor is W1, and the width of the substrate is W2, satisfying W1-W2≤5mm.

9. A flash nonwoven fabric production line, based on the flash nonwoven fabric uniformity detection device according to any one of claims 1 to 8, characterized in that: It also includes a feeding device, a spinning device, a fiber opening device, a web laying device, a calendering device and a winding device; the feeding device, the spinning device, the fiber opening device, the web laying device and the calendering device are sequentially arranged at the feeding end of the conveyor, and the winding device is arranged at the discharging end of the conveyor; Among them, the feeding device is used to transport the spinning liquid, the spinning device is used to spin the spinning liquid to form fibers, which are then formed into a fiber web through a fiber opening device, and multiple layers of fiber webs are stacked through a web laying device to form a composite fiber web, which is then processed through the calendering device to form a flash non-woven fabric, which is then transported to a winding device for winding after being tested by the flash non-woven fabric uniformity detection equipment.

10. A flash-steamed nonwoven fabric uniformity detection method, based on the flash-steamed nonwoven fabric uniformity detection device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, measuring the width W of the flash steamed nonwoven fabric, and the straight-line distances L1 and L2 from the two side end surfaces of the flash steamed nonwoven fabric to the inner walls on both sides of the conveyor; S2. According to the straight-line distances L1 and L2, adjust the detection width of the light intensity sensing module in the second direction to be greater than or equal to W; S3, emitting light to irradiate the upper surface of the flash-steamed non-woven fabric; S4, measuring the light transmittance of the flash-steamed non-woven fabric, and obtaining the standard dynamic range of the flash-steamed non-woven fabric according to the measured light transmittance; S5. Determine whether more than 90% of the transmittance data are within the standard dynamic range.

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