Aerosil felt of different thickness and removal process of different length broken needles

Abstract

This invention discloses a process for removing broken needles from aerogel mats of varying thicknesses and lengths, comprising the following steps: S1, removing broken needles from the front side; S2, connecting and transferring the aerogel mat; S3, removing broken needles from the back side. This invention, on the one hand, is based on sequentially processing broken needles from the front and back sides of the aerogel mat, employing repeated extrusion to expand the needle holes, loosening the broken needles relative to the aerogel mat, and simultaneously using corresponding magnetic attraction to remove them. Furthermore, it involves graded removal to meet the needs of operations with varying levels of difficulty, thus being suitable for removing broken needles from aerogel mats of different thicknesses and lengths. On the other hand, it uses a transfer mechanism to connect the front and back processing of the aerogel mat, and uses the same removal method to further remove broken needles from the back side in a graded manner, improving the quality of the aerogel mat and preventing products containing broken needles from being exported during the final inspection.

Description

Technical Field

[0001] This invention belongs to the field of novel fiber and composite material preparation technology, specifically relating to a process for removing broken needles of different thicknesses and lengths of aerogel felts. Background Technology

[0002] Currently, the production line for aerogel felt (felt or pre-oxidized fiber felt) typically consists of pretreatment equipment, feeding equipment, needle rolling equipment, heat setting equipment, and edge trimming and rolling equipment. Among them, the needle rolling equipment is the core part of the production line, including pre-needle rolling mill, forward needle rolling mill, and reverse needle rolling mill, which interweaves fibers to form felt through needle punching.

[0003] However, needle breakage is inevitable during acupuncture. Therefore, needle breakage detection is generally required after acupuncture. The detection method is based on the presence of broken needles. Once a broken needle is found, the aerogel felt in the corresponding detection area is attracted and adheres to the magnetic component. Then the machine is stopped, and the broken needle is manually removed.

[0004] Clearly, the above-mentioned process of removing broken needles still presents the following challenges:

[0005] 1) Because aerogel felt is an interwoven product, once it is absorbed and stretched, the resulting interwoven gaps will become smaller, increasing the difficulty of pulling out broken needles.

[0006] 2) Magnetic adsorption is a whole-section adsorption. Since the broken needles are hidden inside the aerogel felt and the broken needles are of different lengths, it not only increases the difficulty of manual removal, but also increases the probability of broken needles being missed, thus affecting the quality of the aerogel felt. At the same time, it is also not conducive to subsequent cutting and sewing and other series of processing.

[0007] 3) Due to the thickness requirements of aerogel felt itself, the general thickness is about 1.2~6.5mm. However, magnetic screening on one side has a high probability of missing detection. At the same time, since broken needles also vary in length, if broken needles are handled indiscriminately, there is a high probability of residual needles, which seriously affects the quality of aerogel felt. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a novel process for removing broken needles of different thicknesses and lengths from aerogel mats.

[0009] To achieve the above objectives, the present invention adopts the following solution:

[0010] A process for removing broken needles of varying thicknesses and lengths from aerogel mats includes the following steps:

[0011] S1. Remove broken needles from the front.

[0012] The aerogel felt is transported from the front to the detection area and from bottom to top. Before being transported to the detection area, it undergoes a step-by-step extrusion process. The step-by-step extrusion process is divided into 1, 2...N levels according to the length of the broken needle. Each level of extrusion uses a tensioned transport process to extrude the broken needles of different lengths back and forth in the thickness direction of the aerogel felt to enlarge the needle holes. Each level of extrusion is accompanied by a step-by-step adsorption. As the extrusion force and adsorption force increase from level 1, 2...N, the extrusion force and adsorption force increase step by step. After adsorption, the aerogel felt enters the detection area for re-inspection and continues to be transported upward after passing the inspection, so as to complete the removal of the broken needles on the front.

[0013] S2, Aerogel Felt Connection and Transmission

[0014] The aerogel felt being transported upwards is guided by a transfer roller, and the aerogel felt is transported forward and downwards while maintaining the aerogel felt facing the detection area from the back side and then being transported downwards.

[0015] S3, Remove broken needles from the back.

[0016] Using the same principle as removing broken needles from the front, the aerogel felt is conveyed downwards, sequentially entering stages 1, 2...N. At the same time, the extrusion force and adsorption force formed increase at each stage. After adsorption, the aerogel felt enters the detection area for re-inspection and, if it passes the inspection, continues to be conveyed downwards to complete the removal of broken needles from the back.

[0017] According to a specific embodiment and preferred aspect of the present invention, the front-side broken needle removal device used in step S1 includes a front-side magnetic detection unit and a first operating station. The aerogel felt is transported from the front side to the front detection area of ​​the front-side magnetic detection unit from bottom to top. The first operating station includes a first operating platform, a first ejector pin component formed at the feed end of the front detection area, and a first magnetic attraction component corresponding to the first ejector pin component. The first ejector pin component extends along the width direction of the aerogel felt and abuts against the front and / or back of the aerogel felt to keep the aerogel felt under tension and repeatedly push the broken needle out of the aerogel felt. The first magnetic attraction component is close to the protruding end of the broken needle and attracts the broken needle.

[0018] Preferably, the first ejector pin component includes multiple ejector pin groups with progressively increasing contact force from bottom to top, and each ejector pin group has at least three broken needle extrusion points; the first magnetic attraction component includes magnetic attraction groups corresponding one-to-one with each of the ejector pin groups.

[0019] In some specific embodiments, each of the ejector pin groups includes multiple ejector rods that are relatively spaced apart in both the vertical direction and the thickness direction of the aerogel felt, and an external connector for fixing the multiple ejector rods relative to each other from the ends. The aerogel felt passes through the multiple ejector rods in a meandering manner from bottom to top in the thickness direction of the aerogel felt so that a V-shaped apex is formed between every three rods. The aerogel felt is pushed outward by the tip of the V-shaped apex, and the magnetic adsorption group is correspondingly set at the tip of the V-shaped apex.

[0020] According to another specific embodiment and preferred aspect of the invention, the V-shaped angle formed by the tips of each of the first ejector pin groups gradually decreases from bottom to top; and / or, the magnetic adsorption group includes two mounting seats located on both sides and a magnetic rod mounted between the two mounting seats from the end, wherein the magnetic rod is distributed corresponding to the tip.

[0021] In some specific embodiments, the cross-section of the push rod is circular, elliptical, or triangular; and / or, there are three push rods, and the centers of the three push rods are distributed in an isosceles triangle in their own axial orthogonal projection.

[0022] Preferably, the magnetic attraction force of each magnetic attraction group of the first magnetic attraction component increases progressively from bottom to top; and / or, the distance from each magnetic attraction group of the first magnetic attraction component to the tip decreases progressively from bottom to top.

[0023] According to a specific embodiment and preferred aspect of the present invention, the fabric turning device used in step S2 includes a turning seat located on top of the first operating platform and the second operating platform, a plurality of parallel turning rollers mounted on the turning seat, and a turning motor for driving any one or more turning rollers to rotate, wherein the aerogel felt is transmitted from the back side downward and inward to the second ejector pin component under the transmission of the rotation of the plurality of turning rollers, and the downward transmission is maintained with the back side facing the back detection area; one of the plurality of turning rollers can move up and down relative to each other to adjust the tension of the aerogel felt.

[0024] Furthermore, the back-side broken needle removal device used in step S3 includes a back-side magnetic detection unit identical to the front-side magnetic detection unit and a second operating station identical to the first operating station. The back-side magnetic detection unit is located below the discharge end of the second ejector pin component of the second operating station. The aerogel felt passes through the second operating station and the back-side magnetic detection unit sequentially from top to bottom. The second ejector pin component extends along the width of the aerogel felt and abuts against the front and / or back of the aerogel felt to keep the aerogel felt under tension and repeatedly push the broken needle out of the aerogel felt. The second magnetic attraction component is close to the protruding end of the broken needle and attracts the broken needle.

[0025] Preferably, the angle formed by the tips of each of the pin groups of the second pin component gradually decreases from top to bottom; and / or, the magnetic attraction force of each magnetic attraction group of the second magnetic attraction component gradually increases from top to bottom; and / or, the distance from each magnetic attraction group of the second magnetic attraction component to the tip gradually decreases from top to bottom.

[0026] Due to the application of the above-mentioned technologies and equipment, the present invention has the following advantages compared with the prior art:

[0027] In existing methods for removing broken needles from aerogel felt, the interwoven fabric of the aerogel felt becomes increasingly difficult to remove due to the shrinking gaps created by adhesion and tension. Magnetic attraction, which involves adsorption of the entire piece, presents challenges because broken needles are often embedded within the aerogel felt and vary in length. This not only increases the difficulty of manual removal but also raises the probability of missed needles, impacting the quality of the aerogel felt and hindering subsequent cutting and sewing processes. Furthermore, given the required thickness of aerogel felt (typically 1.2–6.5 mm), single-sided magnetic screening is highly likely to result in missed needles. Additionally, the varying lengths of broken needles mean that indiscriminate treatment leaves significant residue. The high probability of broken needles significantly affects the quality of aerogel mats. This application addresses these shortcomings by designing a comprehensive removal process applicable to aerogel mats of varying thicknesses and lengths, cleverly resolving the deficiencies of existing technologies. The process involves the aerogel mat being transported from the front towards the detection area, moving upwards while undergoing a step-by-step extrusion process before reaching the detection area. This step-by-step extrusion is divided into stages 1, 2…N based on the length of the broken needles. Each stage of extrusion employs a tensioning process to repeatedly extrude broken needles of different lengths along the thickness of the aerogel mat, enlarging the needle holes. Each stage of extrusion also utilizes a step-by-step adsorption process, with each stage…N…… As the extrusion and adsorption forces increase, the aerogel felt, after adsorption, enters the testing area for re-inspection and continues to be conveyed upwards to remove the broken needles on the front side. Next, the upward-conveyed aerogel felt is guided by a transfer roller, moving forward and downwards while maintaining its back side facing the testing area. Finally, using the same principle as removing broken needles on the front side, the downward-conveyed aerogel felt sequentially enters stages 1, 2…N, with the extrusion and adsorption forces increasing progressively. After adsorption, the aerogel felt enters the testing area for re-inspection and continues to be conveyed downwards to remove the broken needles on the back side. Therefore, compared with existing technologies… In contrast, this invention, on the one hand, is based on sequentially processing the broken needles on the front and back sides of the aerogel felt, and employs repeated extrusion during processing to expand the needle holes, loosening the broken needles relative to the aerogel felt, while simultaneously using corresponding magnetic attraction to remove the broken needles. Furthermore, it also performs step-by-step removal according to grading to meet the operational needs of different difficulty levels, i.e., it is applicable to the removal of broken needles of different thicknesses and lengths of aerogel felts. On the other hand, it uses a transfer mechanism to connect the processing of the front and back sides of the aerogel felt, and uses the same removal method to remove broken needles step-by-step on the back side, improving the quality of the aerogel felt, and preventing products containing broken needles from being released during the final inspection. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the process flow in this embodiment;

[0029] Figure 2 This is a front view schematic diagram of the aerogel felt double-sided broken needle removal system of this embodiment;

[0030] Figure 3 for Figure 2 A top-down view;

[0031] Figure 4 for Figure 2 Left view schematic diagram of the broken needle removal device in the center;

[0032] Figure 5 for Figure 2 Enlarged schematic diagram of the front-side broken needle removal device (arrow direction is in the direction of aerogel felt transmission);

[0033] Figure 6 for Figure 2 Enlarged schematic diagram of the broken needle removal device on the middle and back sides (arrows point in the direction of aerogel felt transmission);

[0034] Among them: 1. Front-facing broken needle removal device; 10. Front-facing magnetic force detection unit; 11. First operating station; 110. First operating platform; 111. First ejector pin component; 112. First magnetic attraction component;

[0035] 2. Back-side broken needle removal device; 20. Back-side magnetic detection unit; 21. Second operating station; 210. Second operating platform; 211. Second ejector pin assembly; 212. Second magnetic attraction assembly;

[0036] a. Ejector pin assembly; a1. Ejector rod; a2. External connector; b. Magnetic adsorption assembly; b1. Mounting base; b2. Magnetic rod; g1. Fixing base; g2. Magnetic transmission roller; g3. Magnetic sensor;

[0037] 3. Fabric turning device; 30. Turning seat; 31. Turning roller; 32. Turning motor;

[0038] M, Aerogel felt. Detailed Implementation

[0039] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0040] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of a second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.

[0044] like Figure 1 As shown, this embodiment describes a process for removing broken needles of varying thicknesses and lengths from aerogel mats, comprising the following steps:

[0045] S1. Remove broken needles from the front.

[0046] The aerogel felt is transported from the front to the detection area and from bottom to top. Before being transported to the detection area, it undergoes a step-by-step extrusion process. The step-by-step extrusion process is divided into 1, 2...N levels according to the length of the broken needle. Each level of extrusion uses a tensioned transport process to extrude the broken needles of different lengths back and forth in the thickness direction of the aerogel felt to enlarge the needle holes. Each level of extrusion is accompanied by a step-by-step adsorption. As the extrusion force and adsorption force increase from level 1, 2...N, the extrusion force and adsorption force increase step by step. After adsorption, the aerogel felt enters the detection area for re-inspection and continues to be transported upward after passing the inspection, so as to complete the removal of the broken needles on the front.

[0047] S2, Aerogel Felt Connection and Transmission

[0048] The aerogel felt being transported upwards is guided by a transfer roller, and the aerogel felt is transported forward and downwards while maintaining the aerogel felt facing the detection area from the back side and then being transported downwards.

[0049] S3, Remove broken needles from the back.

[0050] Using the same principle as removing broken needles from the front, the aerogel felt is conveyed downwards, sequentially entering stages 1, 2...N. At the same time, the extrusion force and adsorption force formed increase at each stage. After adsorption, the aerogel felt enters the detection area for re-inspection and, if it passes the inspection, continues to be conveyed downwards to complete the removal of broken needles from the back.

[0051] Combination Figures 2 to 6 As shown, the broken needle removal system used in the above removal process includes a front broken needle removal device 1, a back broken needle removal device 2, and a fabric turning device 3. Both the front broken needle removal device 1 and the back broken needle removal device 2 use two stages to remove broken needles (i.e., N=2).

[0052] Specifically, the front-side broken needle removal device 1 includes a front-side magnetic detection unit 10 and a first operating station 11. The aerogel felt M is transported from the front to the front detection area of ​​the front-side magnetic detection unit 10 from bottom to top. The first operating station 11 includes a first operating platform 110, a first ejector pin component 111 formed at the feed end of the front detection area, and a first magnetic attraction component 112 corresponding to the first ejector pin component 111. The first ejector pin component 111 extends along the width direction of the aerogel felt M and abuts against the front and / or back of the aerogel felt M to keep the aerogel felt M in a taut state and repeatedly push the broken needle out of the aerogel felt M. The first magnetic attraction component 111 is close to the protruding end of the broken needle and attracts the broken needle.

[0053] In some specific embodiments, the first ejector pin component 111 includes multiple ejector pin groups a forming an increasing contact force from bottom to top, each ejector pin group a having at least three broken needle extrusion points; the first magnetic attraction component 112 includes magnetic attraction groups b corresponding one-to-one with each ejector pin group a. The three broken needle extrusion points thus form at least three extrusions to achieve repeated extrusion on both the front and back sides (of course, there can be four, five, or more broken needle extrusion points), thereby enlarging the pinhole and facilitating magnetic attraction (effectively removing broken needles).

[0054] In this example, each ejector pin group a includes multiple ejector rods a1 spaced relatively apart in both the vertical direction and the thickness direction of the aerogel felt M, and an external connector a2 for fixing the multiple ejector rods a1 relatively from their ends. The aerogel felt M passes through the multiple ejector rods a1 from bottom to top in the thickness direction of the aerogel felt M, so that a V-shaped apex is formed between every three rods. The aerogel felt M is pushed outward by the tip of the V-shaped apex, and the magnetic adsorption group b is correspondingly set at the tip of the V-shaped apex. The V-shaped apex extrusion method prevents damage to the aerogel felt caused by broken needles and is more conducive to the ejection operation. The cross-section of the ejector rod a1 is circular, elliptical, or triangular; in this application, there are three ejector rods a1, and the centers of the three ejector rods are distributed in an isosceles triangle in their own axial orthogonal projection. This layout is more conducive to the adhesion of the aerogel felt and also facilitates the extrusion of broken needles. The magnetic adsorption assembly b includes two mounting bases b1 located on both sides and a magnetic rod b2 installed between the two mounting bases b1 from the end, wherein the magnetic rod b2 is distributed with its tip corresponding to the tip. This arrangement of magnetic rods corresponding to the tip is more conducive to the adsorption of broken needles. Each magnetic adsorption assembly b of the first magnetic adsorption component 112 is located on the same side of the aerogel felt M and is located on the opposite outer side of the external mounting base a2. This greatly facilitates the installation of the magnetic adsorption assembly.

[0055] The back-side broken needle removal device 2 includes a back-side magnetic detection unit 20, which is the same as the front-side magnetic detection unit 10, and a second operating station 21, which is the same as the first operating station 11. The back-side magnetic detection unit 20 is located below the discharge end of the second ejector pin component 211 of the second operating station 21. The aerogel felt M passes through the second operating station 21 and the back-side magnetic detection unit 20 from top to bottom. The second ejector pin component 211 extends along the width direction of the aerogel felt M and abuts against the front and / or back of the aerogel felt M to keep the aerogel felt M in a taut state and repeatedly push the broken needle out of the aerogel felt M. The second magnetic attraction component 212 is close to the protruding end of the broken needle and attracts the broken needle.

[0056] Although the back-side broken needle removal device 2 and the front-side broken needle removal device 1 have the same structure, there are still the following differences in their layout:

[0057] 1) The V-shaped angle formed by the tips of each set of a ejector pins in the first ejector pin component 111 gradually decreases from bottom to top; the angle formed by the tips of each set of a ejector pins in the second ejector pin component 211 gradually decreases from top to bottom. In this way, as the aerogel felt is transported, broken needles of different lengths can be effectively extruded under different extrusion forces, and the easier ones are extruded first, while the more difficult ones are extruded later, reducing the probability of missing broken needles.

[0058] 2) The magnetic adsorption force of each magnetic adsorption group in the first magnetic adsorption component 111 increases progressively from bottom to top; the magnetic adsorption force of each magnetic adsorption group in the second magnetic adsorption component 212 increases progressively from top to bottom. As the adsorption difficulty increases, the required adsorption force is greater.

[0059] 3) The distance from each magnetic adsorption group of the first magnetic adsorption component 111 to the tip gradually decreases from bottom to top; the distance from each magnetic adsorption group of the second magnetic adsorption component 212 to the tip gradually decreases from top to bottom. Further improvements in the optimal adsorption force are achieved by arranging different intervals.

[0060] The magnetic detection unit (the front magnetic detection unit 10 or the back magnetic detection unit 20 have the same structure) includes a fixed base g1, a magnetic transmission roller g2, and a magnetic sensor g3. The magnetic sensor g3 performs magnetic detection on the aerogel felt after it has been processed at the operating station and can issue an alarm. In short, the magnetic detection unit is the last line of defense. Once detected, the probability of broken needles in the aerogel felt is basically zero. Moreover, once an alarm is issued, it indicates that some needles have not been adsorbed and removed, at which point manual emergency handling is necessary.

[0061] In addition, the fabric turning device 3 is located between the front needle removal device 1 and the back needle removal device 2, and is used to turn the aerogel felt M between the front and back sides through the second pin component 211.

[0062] Specifically, the fabric turning device 3 includes a turning seat 30 located on top of the first operating platform 110 and the second operating platform 210, multiple parallel turning rollers 31 mounted on the turning seat 30, and a turning motor 32 that drives one or more turning rollers 31 to rotate. The aerogel felt M is transported from the back side downwards and inwards to the second ejector pin component 211 under the rotation of the multiple turning rollers 31, maintaining a downward transmission with the back side facing the back detection area. Generally, there are three turning rollers arranged in a triangular pattern, and driving one of them is sufficient, while the remaining two rotate automatically.

[0063] In summary, after adopting this removal process, firstly, the aerogel felt faces the detection area from the front and is conveyed from bottom to top. Simultaneously, before reaching the detection area, it undergoes a step-by-step extrusion process. This step-by-step extrusion process is divided into stages 1, 2…N based on the length of the broken needles. Each stage of extrusion employs a tensioned conveying process to repeatedly extrude broken needles of different lengths along the thickness direction of the aerogel felt to enlarge the needle holes. Each stage of extrusion corresponds to a step-by-step adsorption process. Furthermore, the extrusion and adsorption forces increase progressively with each stage (1, 2…N). After adsorption, the aerogel felt enters the detection area for re-inspection and, if it passes, continues to be conveyed upwards to complete the removal of the broken needles on the front. Secondly, the upward-conveyed aerogel felt is guided by a transfer roller. The aerogel felt is conveyed forward and downward, maintaining its back side facing the detection area before being transported downwards. Finally, using the same principle as removing broken needles from the front side, the downward-transporting aerogel felt sequentially enters stages 1, 2…N, with the extrusion and adsorption forces increasing progressively at each stage. After adsorption, the aerogel felt enters the detection area for re-inspection and, if it passes, continues to be transported downwards to complete the removal of broken needles from the back side. Therefore, compared to existing technologies, this invention, on the one hand, is based on sequentially processing broken needles from both the front and back sides of the aerogel felt, and on the other hand, employs repeated extrusion to expand the needle holes, loosening the broken needle relative to the aerogel felt, while simultaneously using corresponding magnetic attraction to remove the broken needle. Furthermore, it removes the needle step-by-step according to different grades to meet varying degrees of difficulty. The system is designed to meet the ease of operation requirements, applicable to the removal of broken needles of varying thicknesses and lengths from aerogel mats. Secondly, a transfer station is used to connect the front and back processing of the aerogel mat, and the same removal method is used to progressively remove broken needles from the back side, improving the quality of the aerogel mat and preventing products containing broken needles from being exported during final inspection. Thirdly, a dual-station system is used to extrude the front and back sides of the aerogel mat sequentially. During extrusion, repeated ejection is used to enlarge the needle holes, loosening the broken needles from the aerogel mat, and then magnetic adsorption is used to remove them. This system not only meets the need for removing broken needles from aerogel mats of different thicknesses but also effectively removes broken needles of varying lengths, all without manual intervention and with high efficiency. The efficiency is high; on the other hand, based on the removal detection of the front and back magnetic detection units after removal, the quality of broken needle removal is further controlled to avoid economic losses due to missing broken needles; in the fourth aspect, the three broken needle extrusion points form at least three extrusions to achieve repeated extrusion of the front and back sides (of course, there can be four, five or more broken needle extrusion points), which makes the pinhole larger, thus facilitating magnetic adsorption (effectively implementing broken needle removal); in the fifth aspect, the V-shaped angle extrusion is adopted, which will not cause damage to the aerogel felt by the broken needles, and is more conducive to the ejection operation. At the same time, with the transmission of the aerogel felt, under the action of different extrusion forces, broken needles of different lengths can be effectively extruded, and the easy ones are extruded first and the difficult ones are extruded later, reducing the probability of missing broken needle removal.The sixth aspect utilizes a magnetic rod-to-tip layout, which is more conducive to the adsorption of broken needles. Furthermore, as the adsorption difficulty increases, the required adsorption force is greater. Additionally, the layout with different spacing further improves the optimal adsorption strength. The seventh aspect employs a tiered approach (1, 2…N), the biggest advantage of which is the gradual removal of broken needles, starting with the simpler ones and progressing to the more difficult ones. This avoids interference between broken needles of different lengths during the removal process, preventing needle leakage. It should be noted that shorter needles are more difficult to remove; therefore, shorter needles require more repeated extrusions to achieve optimal removal.

[0064] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A process for removing broken needles of varying thicknesses and thicknesses, characterized in that, It includes the following steps: S1. Remove broken needles from the front. The aerogel felt is transported from the front towards the detection area, moving upwards. Before reaching the detection area, it undergoes a step-by-step extrusion process, divided into stages 1, 2…N based on the length of the broken needles. Each stage of extrusion involves tensioning the aerogel felt during transport, repeatedly extruded along the thickness of the aerogel felt to enlarge the needle holes, and corresponding to each stage of extrusion, a step-by-step adsorption process is employed. The extrusion and adsorption forces increase progressively with each stage (1, 2…N). After adsorption, the aerogel felt enters the detection area for re-inspection and, if it passes, continues to be transported upwards to complete the removal of the broken needles on the front. The front-side broken needle removal device includes a front magnetic detection unit and a first operating station. The aerogel felt is transported from the front towards the front detection area of ​​the front magnetic detection unit, moving upwards. The first operating station includes a first operating platform… The first ejector pin component at the feed end of the front detection area and the first magnetic suction component corresponding to the first ejector pin component extend along the width direction of the aerogel felt and repeatedly push the broken needle out of the aerogel felt. The first ejector pin component includes multiple ejector pin groups with progressively increasing contact force from bottom to top. Each ejector pin group includes multiple push rods that are relatively spaced in both the vertical and horizontal directions and the thickness direction of the aerogel felt, and an external connector for fixing the multiple push rods relatively from their ends. The aerogel felt passes through the multiple push rods in a meandering manner from bottom to top in the thickness direction of the aerogel felt so that a V-shaped sharp angle is formed between every three push rods. The aerogel felt is pushed outward by the tip of the V-shaped sharp angle. The V-shaped angle formed by the tips of each ejector pin group of the first ejector pin component gradually decreases from bottom to top. The first magnetic suction component is close to the end of the broken needle and attracts the broken needle. S2, Aerogel Felt Connection and Transmission The aerogel felt being transported upwards is guided by a transfer roller, and the aerogel felt is transported forward and downwards while maintaining the aerogel felt facing the detection area from the back side and then being transported downwards. S3, Remove broken needles from the back. Using the same principle as removing broken needles from the front, the aerogel felt is conveyed downwards, sequentially entering stages 1, 2...N. At the same time, the extrusion force and adsorption force formed increase at each stage. After adsorption, the aerogel felt enters the detection area for re-inspection and, if it passes the inspection, continues to be conveyed downwards to complete the removal of broken needles from the back.

2. The process for removal of different length of broken needles suitable for different thickness of aerogel blanket and length of broken needles as claimed in claim 1 wherein, In step S1, the first ejector pin component abuts against the front and / or back of the aerogel felt to repeatedly and multiple times eject the broken needle out of the aerogel felt while it is under tension.

3. The process for removal of different length of broken needles suitable for different thickness of aerogel blanket and length of broken needles according to claim 2, wherein, Each ejector pin group has at least three broken needle extrusion points, and the first magnetic suction component includes magnetic adsorption groups that correspond one-to-one with each of the ejector pin groups.

4. The removal process for aerogel mats of different thicknesses and broken needles of varying lengths as described in claim 3, characterized in that, The magnetic adsorption group is positioned at the tip of the V-shaped angle.

5. The process for removal of different length of broken needles suitable for different thickness of aerogel batts as claimed in claim 4 wherein, The magnetic adsorption assembly includes two mounting bases located on both sides and a magnetic rod installed between the two mounting bases from the end, wherein the magnetic rod is distributed corresponding to the tip.

6. The process for removal of different length of broken needles suitable for different thickness of aerogel batts as claimed in claim 5 wherein, The cross-section of the top rod is circular, elliptical, or triangular.

7. The process for removal of different length of broken needles suitable for different thickness of aerogel batts as claimed in claim 5 wherein, The three push rods are arranged in an isosceles triangle in their own axial orthogonal projection.

8. The process for removal of different length of broken needles suitable for different thickness of aerogel batts as claimed in claim 5 wherein, The magnetic attraction force of each magnetic adsorption group of the first magnetic attraction component increases progressively from bottom to top.

9. The process for removal of pin-fins of varying lengths and thicknesses of aerogel blanket according to claim 5, wherein, The distance from each magnetic adsorption group of the first magnetic adsorption component to the tip gradually decreases from bottom to top.

10. The process for removal of pin-fins of varying lengths and thicknesses of aerogel blankets of claim 1, wherein, The fabric turning device used in step S2 includes a turning seat located on top of the first operating platform and the second operating platform, multiple parallel turning rollers mounted on the turning seat, and a turning motor that drives one or more turning rollers to rotate. Under the rotation of the multiple turning rollers, the aerogel felt is transmitted from the back side downward and inward to the second ejector pin component, while maintaining the back side facing the back detection area during downward transmission. One of the multiple turning rollers can move up and down relative to each other to adjust the tension of the aerogel felt.

11. The process for removal of pin-fins of varying lengths and thicknesses of aerogel blanket according to claim 1, wherein, The back-side broken needle removal device used in step S3 includes a back-side magnetic detection unit that is the same as the front-side magnetic detection unit and a second operating station that is the same as the first operating station. The back-side magnetic detection unit is located below the discharge end of the second ejector pin component of the second operating station. The aerogel felt passes through the second operating station and the back-side magnetic detection unit from top to bottom. The second ejector pin component extends along the width of the aerogel felt and abuts against the front and / or back of the aerogel felt to keep the aerogel felt under tension and repeatedly push the broken needle out of the aerogel felt. The second magnetic attraction component of the second operating station is close to the protruding end of the broken needle and attracts the broken needle.

12. The process for removal of different length of broken needles suitable for different thickness of aerogel batts as claimed in claim 11 wherein, The angle formed by the tips of each of the ejector pin groups in the second ejector pin component gradually decreases from top to bottom.

13. The process for removal of pins of varying lengths suitable for different thicknesses of aerogel batts and lengths of pins according to claim 11, wherein, The magnetic attraction force of each magnetic adsorption group of the second magnetic attraction component increases progressively from top to bottom.

14. The process for removal of pins of varying lengths suitable for different thicknesses of aerogel blanket and lengths of pins according to claim 11, wherein, The distance from each magnetic adsorption group of the second magnetic adsorption component to the tip gradually decreases from top to bottom.

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