Defect positioning device for nonwoven fabric

Abstract

The utility model discloses a kind of defect positioning device of non-woven fabric, belong to non-woven fabric production equipment technical field, the device includes the defect detection positioning assembly on non-woven fabric slitting and picking waste equipment, it contains color difference sensor densely arranged in cloth surface width, back light plate on equipment and the indicator light of back light plate periphery, when color difference sensor detects defect, output is set to stop signal according to pre-set stop distance, so that defect accurately stays in back light plate area;Indicator light and sensor detection point position one-to-one correspondence, when detecting defect, corresponding horizontal position indicator light is lit, the device can quickly and accurately locate defect, improve detection efficiency and accuracy, facilitate operator processing, suitable for the defect detection positioning of multiple non-woven fabric.

Description

Technical Field

[0001] This utility model relates to the field of nonwoven fabric processing technology, specifically to a defect location device for nonwoven fabric. Background Technology

[0002] During the production of nonwoven fabrics, defects such as black spots, foreign objects, and holes can easily occur on the fabric surface due to factors such as raw materials, equipment operation, or environmental conditions. These defects directly affect product quality and applicability to various application scenarios. Especially in fields with stringent quality requirements for nonwoven fabrics, such as medical and health care and high-end home furnishings, defect detection and location are critical steps in the production process.

[0003] In existing technologies, defect detection in nonwoven fabrics largely relies on manual visual inspection or traditional automated equipment. Manual inspection is labor-intensive, inefficient, and susceptible to subjective factors, resulting in high rates of missed and false detections, making it difficult to meet the demands of high-speed production lines. While traditional automated inspection equipment can identify defects, it generally suffers from insufficient positioning accuracy—after detecting a defect, it cannot precisely locate it in a specific area convenient for operators to handle, and it lacks intuitive location indicators, forcing operators to repeatedly search across large areas of fabric, extending processing time, impacting production efficiency, and increasing production costs.

[0004] Therefore, there is an urgent need for a device that can accurately locate defects and provide intuitive location indications to solve the problems of inaccurate positioning and inconvenient operation in existing detection technologies, and improve the quality control level of nonwoven fabric production. Utility Model Content

[0005] The purpose of this invention is to provide a defect location device for nonwoven fabrics to solve the defects of existing similar products. This device can quickly and accurately locate defects, improve detection efficiency and accuracy, facilitate operator handling, and is applicable to defect detection and location of various nonwoven fabrics.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a defect location device for nonwoven fabric, comprising a defect detection and location component installed on a nonwoven fabric slitting and rejecting equipment; the defect detection and location component includes color difference sensors densely arranged at the cross-sectional positions of the nonwoven fabric, a backlight plate set on the nonwoven fabric slitting and rejecting equipment, and indicator lights arranged on the equipment frame surrounding the backlight plate; the color difference sensors are used to detect defects on the nonwoven fabric, and when a defect is detected, they output a stop signal to the nonwoven fabric slitting and rejecting equipment, the stop signal being set according to a preset stop distance, so that the defect position accurately stops in the backlight plate area; the indicator lights correspond one-to-one with the detection points of the color difference sensors, and when the color difference sensors detect a defect, the indicator light at the corresponding cross-sectional position lights up.

[0007] To further optimize this utility model, the following technical solutions may be preferred: Preferably, the color difference sensors are densely arranged and cover the entire width of the slitting and rejecting equipment, with their sensing points covering the entire surface of the nonwoven fabric.

[0008] Preferably, each color difference sensor has an indicator light corresponding to its detection point above the device frame of the backlight panel. When the color difference sensor detects a defect and makes the defect stay in the backlight panel area, the indicator light at the corresponding detection point lights up synchronously.

[0009] Preferably, the nonwoven fabric includes polyester-viscose spunlace fabric, washable spunlace fabric, spunbond nonwoven fabric, meltblown nonwoven fabric, or hot air nonwoven fabric.

[0010] Preferably, the defects include black spots, yellow spots, foreign objects, metals that differ in color from the fabric surface, animal carcasses, hair, holes, wrinkles, or lumps of paste.

[0011] Preferably, the nonwoven fabric slitting and waste removal equipment includes a frame, on which a waste-to-be-removed slitting roll, a steering shaft, a slitting roller, a top roller, and a slitting roll are arranged sequentially along the nonwoven fabric conveying direction; multiple steering shafts are arranged side by side, and the color difference sensor and backlight plate are arranged on the frame between the corresponding steering shafts.

[0012] Preferably, the indicator light corresponds to the lateral coordinate of the defect location, which is used to locate the lateral coordinate of the detected defect on the backlight panel.

[0013] The beneficial effects of this utility model are mainly reflected in the following aspects: (1) Precise and efficient positioning: Through the densely arranged color difference sensors covering the entire width of the equipment, defects on the entire non-woven fabric can be detected comprehensively; combined with the stop signal set according to the preset stop distance, the defects can be accurately stopped in the backlight area, solving the problem of insufficient positioning accuracy of traditional equipment and greatly improving the accuracy and efficiency of defect positioning.

[0014] (2) Intuitive and convenient indication: The indicator lights correspond one-to-one with the detection points of the color difference sensor. When a defect appears, the indicator lights at the corresponding horizontal position light up simultaneously, intuitively indicating the horizontal coordinates of the defect. This saves operators from repeatedly searching on a large fabric surface, significantly shortens processing time, and reduces manual labor intensity.

[0015] (3) Wide range of applications: It can be adapted to various non-woven fabrics such as polyester-viscose spunlace fabric and meltblown non-woven fabric, and can detect various defects such as black spots, holes, and wrinkles, meeting the quality inspection needs of different production scenarios and is highly practical.

[0016] (4) Optimize the production process: Through precise positioning and intuitive instructions, reduce missed inspections and false inspections, improve the quality control level of nonwoven fabrics, reduce the increase in production costs caused by improper handling of defects, and help efficient production. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the defect locating device of this utility model; Figure 2 This is a schematic diagram of the main structure of the sensor of this utility model; Figure 3 This is a schematic diagram of the main structure of the backlight panel indicator light of this utility model.

[0018] In the diagram: 1-Waste fabric roll to be discarded and slit; 2-Non-woven fabric; 3-Steering shaft; 4-Color difference sensor; 5-Backlight panel; 6-Indicator light; 7-Slitting roller; 8-Top roller; 9-Slitted fabric roll. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this utility model.

[0021] Example 1: like Figure 1-3 As shown, a defect location device for nonwoven fabric includes a defect detection and location component installed on a nonwoven fabric slitting and rejecting equipment. The defect detection and location component includes color difference sensors 4 densely arranged at the cross-sectional positions of the nonwoven fabric 2, a backlight plate 5 installed on the nonwoven fabric slitting and rejecting equipment, and indicator lights 6 arranged on the equipment frame around the backlight plate. The color difference sensors are used to detect defects on the nonwoven fabric. When a defect is detected, a stop signal is output to the nonwoven fabric slitting and rejecting equipment. The stop signal is set according to a preset stop distance so that the defect position is accurately stopped in the backlight plate area. The indicator lights correspond one-to-one with the detection points of the color difference sensors. When the color difference sensors detect a defect, the indicator light at the corresponding cross-sectional position lights up.

[0022] As a preferred implementation, color difference sensors are densely arranged and cover the entire width of the slitting and rejecting equipment, with their sensing points covering the entire surface of the nonwoven fabric 2. Since the sensing points can cover the entire surface of the nonwoven fabric, they can comprehensively capture defects in all areas of the fabric, avoid missed detection problems caused by insufficient detection range, and further improve the integrity and reliability of detection.

[0023] As a preferred implementation, each color difference sensor 4 has an indicator light installed above the device frame of the backlight panel at its corresponding detection point. When the color difference sensor 4 detects a defect and causes the defect to remain in the backlight panel area, the indicator light at the corresponding detection point lights up simultaneously. When the defect remains in the backlight panel area, the precise correspondence between the indicator light and the detection point provides operators with intuitive and immediate lateral position guidance, significantly shortening the defect finding time and reducing the difficulty of manual operation.

[0024] As a preferred embodiment, the nonwoven fabric 2 includes polyester-viscose spunlace fabric, washable spunlace fabric, spunbond nonwoven fabric, meltblown nonwoven fabric, or hot air nonwoven fabric; it is clearly applicable to various types of nonwoven fabrics such as polyester-viscose spunlace fabric and meltblown nonwoven fabric, which broadens the application scenarios of the device, enables it to adapt to the production needs of nonwoven fabrics of different materials, and enhances the versatility and market applicability of the device.

[0025] As a preferred implementation scheme, defects include black spots, yellow spots, foreign objects, metals that differ in color from the fabric surface, animal carcasses, hair, holes, wrinkles, or lumps; the detection range covers a variety of defect types such as black spots, holes, and wrinkles, which can comprehensively address various quality defects that may occur in nonwoven fabric production, improve the comprehensiveness of quality control, and ensure that products meet the quality standards of different application fields.

[0026] As a preferred embodiment, the nonwoven fabric slitting and rejecting equipment includes a frame. Along the nonwoven fabric conveying direction, the frame is sequentially equipped with a rejectable slitting roll 1, a steering shaft 3, a slitting roller 7, a top roller 8, and a slitting roll 9. Multiple steering shafts are installed side-by-side, and color difference sensors and backlight panels are installed on the frame between corresponding steering shafts. Utilizing the stable conveying characteristic of the nonwoven fabric 2 between the steering shafts, the impact of fabric surface vibration on detection accuracy is reduced. This also facilitates structural adaptation with existing slitting and rejecting equipment, reducing modification and installation difficulty. The rejectable slitting roll serves to place the unslitting roll on the fabric rack. "Nonwoven fabric" refers to the entire nonwoven fabric to be rejected and slitting. "Steering shaft 3" refers to the shaft that steers the rejected nonwoven fabric during its movement. "Color difference sensor" refers to a sensor capable of identifying color differences. Backlight requirements: Positioned at eye level of the inspector, separated by a layer of non-woven fabric; Indicator light installation requirements: Located above the backlight, densely arranged horizontally across the entire surface; Slitting blade installation requirements: Located before winding. The top roller's function is to support the non-woven fabric roll after slitting. The slitting roll refers to the wound-up non-woven fabric roll.

[0027] As a preferred implementation, the indicator light corresponds to the lateral coordinate of the defect location, locating the detected defect in the lateral coordinate of the backlight panel; this further refines the positioning dimension, enabling operators to quickly lock the precise lateral position of the defect in the backlight panel area. Combined with the visual assistance of the backlight panel, this achieves "second-level positioning" of the defect, significantly improving processing efficiency.

[0028] Based on the above structure, this solution is as follows: ①Working Principle: The color difference sensor identifies the color difference of the non-woven fabric surface. When a fabric surface with a color difference passes the color difference sensor, it outputs a stop signal to the rejection equipment. Depending on the stopping distance of different equipment, the defect position is always kept in the longitudinal center of the backlight panel, locating the longitudinal coordinate of the detected defect on the backlight panel. The equipment frame above the backlight panel has a row of indicator lights. When a defect is detected, the indicator light at the corresponding horizontal position will light up, locating the horizontal coordinate of the detected defect on the backlight panel. After the defect rejection is completed, the indicator lights above the backlight panel will turn off when the equipment is restarted.

[0029] ② During operation, when the color difference sensor detects a defect in the nonwoven fabric, the equipment will automatically stop, causing the defect to remain in the backlight panel. At the same time, the longitudinal and transverse coordinates are located (the indicator light above the backlight panel lights up), which assists the waste removal personnel in their work and improves waste removal efficiency.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A nonwoven fabric defect positioning device, characterized by: The device includes a defect detection and positioning component installed on a nonwoven fabric slitting and rejecting equipment. The defect detection and positioning component includes color difference sensors densely arranged along the horizontal passing positions of the nonwoven fabric, a backlight panel mounted on the nonwoven fabric slitting and rejecting equipment, and indicator lights arranged on the equipment frame surrounding the backlight panel. The color difference sensors detect defects on the nonwoven fabric and output a stop signal to the nonwoven fabric slitting and rejecting equipment when a defect is detected. The stop signal is set according to a preset stop distance, ensuring the defect position is accurately positioned on the backlight panel. The indicator lights correspond one-to-one with the detection points of the color difference sensors; when a color difference sensor detects a defect, the corresponding indicator light at the horizontal position illuminates.

2. A nonwoven fabric defect positioning device according to claim 1, wherein: The color difference sensors are densely arranged and cover the entire width of the slitting and rejecting equipment, with their sensing points covering the entire surface of the nonwoven fabric.

3. A nonwoven fabric defect locator device according to claim 2, wherein: Each color difference sensor has an indicator light corresponding to its detection point above the device frame of the backlight panel. When the color difference sensor detects a defect and makes the defect stay in the backlight panel area, the indicator light at the corresponding detection point will light up synchronously.

4. A nonwoven fabric defect locator device according to claim 1, wherein: The nonwoven fabric includes polyester-viscose spunlace fabric, washable spunlace fabric, spunbond nonwoven fabric, meltblown nonwoven fabric, or hot air nonwoven fabric.

5. A nonwoven fabric defect locator device according to claim 1, wherein: The defects include black spots, yellow spots, foreign objects, metal that differs in color from the fabric, animal carcasses, hair, holes, wrinkles, or lumps of paste.

6. A nonwoven fabric defect locator device according to claim 1, wherein: The nonwoven fabric slitting and waste removal equipment includes a frame, on which a waste-to-be-removed slitting roll, a steering shaft, a slitting roller, a top roller, and a slitting roll are sequentially arranged along the nonwoven fabric conveying direction. Multiple steering shafts are arranged side by side, and the color difference sensor and backlight panel are arranged on the frame between the corresponding steering shafts.

7. A nonwoven fabric defect locator device according to claim 1, wherein: The indicator light corresponds to the lateral coordinate of the defect location, thus locating the detected defect on the lateral coordinate of the backlight panel.

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