Removal process suitable for aerogel felts with different thicknesses and broken needles with different lengths

Abstract

The invention discloses a removal process suitable for aerogel felts with different thicknesses and broken needles with different lengths. The removal process comprises the following steps: S1, removing the broken needles on the front side; s2, connecting and transmitting the aerogel felt; and S3, removing broken needles on the back surface. On one hand, on the basis of the purposes of sequentially carrying out broken needle treatment on the front face and the back face of the aerogel felt and expanding needle holes by adopting repeated extrusion in the treatment, broken needles are loosened relative to the aerogel felt, meanwhile, the broken needles are removed through corresponding magnetic attraction, in addition, step-by-step removal is carried out according to grading, and the production efficiency is greatly improved. Operation requirements of different difficulty levels are met, that is, the device is suitable for removing working conditions of aerogel felts with different thicknesses and broken needles with different lengths; on the other hand, transfer is adopted to realize connection of treatment of the front surface and the back surface of the aerogel felt, and broken needles on the back surface are removed step by step by adopting the same removal mode, so that the quality of the aerogel felt is improved, and meanwhile, a product containing the broken needles is prevented from flowing out in the final checking of detection.

Description

Technical Field

[0001] The invention belongs to the technical field of preparation of novel fibers and composite materials, and in particular relates to a process for removing broken needles of aerogel felts of different thicknesses and different lengths. Background Art

[0002] At present, the production line of aerogel felt (felt cloth or pre-oxidized fiber felt) is usually composed of pretreatment equipment, feeding equipment, needle rolling equipment, heat setting equipment and edge trimming and rolling equipment, among which the needle rolling equipment is the core part of the production line, including pre-needle rolling machine, positive needle rolling machine and reverse needle rolling machine, etc. The fibers are interwoven with each other through the needle punching action to form felt.

[0003] However, during the acupuncture process, needle breakage is inevitable. Therefore, online broken needle detection is basically required after acupuncture. Depending on whether there is a broken needle (which is judged based on the magnetic adsorption method), once a broken needle exists, the aerogel felt in the corresponding detection area is adsorbed and relatively fits the magnetic component, and then the machine is stopped, and the broken needle is manually pulled out.

[0004] Obviously, the above-mentioned removal operation of the broken needle still has the following difficulties:

[0005] 1) Because aerogel felt is an interwoven product, once it is pulled by adsorption, the interwoven gap formed will become smaller, increasing the difficulty of pulling out the broken needle;

[0006] 2) Magnetic adsorption is a whole section adsorption. Since the broken needles are hidden in 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 missing broken needles, thereby affecting the quality of the aerogel felt. At the same time, it is not conducive to the subsequent series of processing such as cutting and sewing;

[0007] 3) With the requirements of the thickness of aerogel felt itself, the general thickness is about 1.2 to 6.5 mm, and there is a high probability of missed detection if magnetic screening is performed on one side; at the same time, since broken needles also have different lengths, if the broken needles are handled in a general way, there is a high probability of residual, which seriously affects the quality of aerogel felt. Summary of the invention

[0008] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a new process for removing broken needles of aerogel felts of different thicknesses and different lengths.

[0009] To achieve the above object, the present invention adopts the following scheme:

[0010] A process for removing broken needles of different lengths and aerogel felts of different thicknesses, comprising 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. At the same time, it is subjected to step-by-step extrusion treatment before being transported to the detection area. The step-by-step extrusion treatment is divided into 1, 2...N levels according to the length of the broken needles. Each level of extrusion adopts the process of tensioning and transmitting the aerogel felt to extrude the broken needles of different lengths back and forth in the thickness direction of the aerogel felt to expand the pinholes. Each level of extrusion adopts step-by-step adsorption. At the same time, the extrusion force and adsorption force formed increase step by step from the increase of 1, 2...N levels. After adsorption, the aerogel felt enters the detection area for re-inspection and continues to be transported upward to complete the removal of the broken needles on the front side.

[0013] S2. Aerogel felt connection transmission

[0014] The aerogel felt transported upward is guided by the transfer roller, and the aerogel felt is driven forward and downward, and the aerogel felt is kept from the back side facing the detection area and then transported downward;

[0015] S3, remove broken needles from the back

[0016] Using the same principle as removing broken needles on the front side, the aerogel felt transmitted downward enters levels 1, 2...N in sequence. At the same time, the extrusion force and adsorption force formed increase step by step. After adsorption, the aerogel felt enters the inspection area for re-inspection and continues to be transmitted downward to complete the removal of broken needles on the back side.

[0017] According to a specific implementation and preferred aspect of the present invention, the front broken needle removal device used in step S1 includes a front magnetic detection unit and a first operating station, the aerogel felt is transferred from the front side to the front detection area of ​​the front magnetic detection unit from bottom to top, the first operating station includes a first operating platform, a first ejector component formed at the feed end of the front detection area, and a first magnetic attraction component arranged corresponding to the first ejector component, the first ejector component extends along the width direction of the aerogel felt, and contacts the front and / or back side of the aerogel felt to put the aerogel felt in a tensioned state to repeatedly and multiple times eject the broken needle out of the aerogel felt, and the first magnetic attraction component is close to the end where the broken needle emerges, and absorbs the broken needle.

[0018] Preferably, the first ejector pin component includes a plurality of ejector pin groups whose ejector contact forces gradually increase from bottom to top, and each ejector pin group has at least three broken pin extrusion points; and the first magnetic attraction component includes magnetic attraction groups corresponding to each of the ejector pin groups.

[0019] In some specific embodiments, each of the ejector pin groups includes a plurality of ejector pins relatively spaced apart in the up-down direction and in the thickness direction of the aerogel felt, and an external seat for relatively fixing the plurality of ejector pins from the ends thereof, wherein the aerogel felt passes through the plurality of ejector pins from bottom to top in the thickness direction of the aerogel felt so as to form a V-shaped pointed angle support between every three of the ejector pins, and the aerogel felt is ejected outward by the tip of the V-shaped pointed angle, and the magnetic adsorption group is correspondingly arranged at the tip of the V-shaped pointed angle.

[0020] According to another specific implementation and preferred aspect of the present invention, the V-shaped angle formed by the tips of each of the ejector groups of the first ejector component has a gradually decreasing adsorption force from bottom to top; and / or, the magnetic adsorption group includes two mounting seats located on both sides, and a magnetic rod installed 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 mandrel is circular, elliptical or triangular; and / or, there are three mandrels, and the centers of the three mandrels are distributed in an isosceles triangle in their own axial orthographic projection.

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

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

[0024] In addition, 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, wherein the back-side magnetic detection unit is located below the discharge end of the second ejector component of the second operating station, and the aerogel felt passes through the second operating station and the back-side magnetic detection unit from top to bottom, the second ejector component extends along the width direction of the aerogel felt, and contacts the front and / or back of the aerogel felt to put the aerogel felt in a tensioned state to repeatedly and multiple times eject the broken needle out of the aerogel felt, and the second magnetic attraction component is close to the end where the broken needle emerges, and absorbs the broken needle.

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

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

[0027] In the existing removal operation of broken aerogel felt, because aerogel felt is an interwoven product, once it is adsorbed and pulled, the interwoven gap formed will become smaller, increasing the difficulty of pulling out the broken needle; magnetic adsorption is a whole-section adsorption, because the broken needle is hidden in the aerogel felt, and the broken needles are of different lengths, therefore, not only the difficulty of manual removal is increased, but also the probability of missing the broken needle is increased, thereby affecting the quality of the aerogel felt, and at the same time, it is not conducive to the subsequent series of processing such as cutting and sewing; in addition, with the requirements of the thickness of the aerogel felt itself, the general thickness is about 1.2 to 6.5 mm, and single-sided magnetic screening is very likely to miss the detection; at the same time, because the broken needles also have different lengths, if the general removal When dealing with broken needles, there is a high probability of residual, which seriously affects the quality of aerogel felt and other shortcomings. The present application comprehensively designs a removal process suitable for aerogel felts of different thicknesses and broken needles of different lengths, and cleverly solves the shortcomings and defects of the prior art. After adopting the removal process, first, the aerogel felt is transmitted from the front to the detection area from the bottom to the top, and is subjected to step-by-step extrusion treatment before being transmitted to the detection area, wherein the step-by-step extrusion treatment is divided into 1, 2...N levels according to the length of the broken needle, and each level of extrusion adopts the process of tensioning and transmitting the aerogel felt to extrude broken needles of different lengths back and forth in the thickness direction of the aerogel felt to expand the pinholes, and each level of extrusion adopts step-by-step adsorption, and at the same time, the self- With the increase of 1, 2...N levels, the extrusion force and adsorption force formed become larger step by step. After adsorption, the aerogel felt enters the detection area for re-inspection and continues to be transmitted upward to complete the removal of the broken needles on the front side; secondly, the aerogel felt transmitted upward is guided by the transfer transmission roller, the aerogel felt is transmitted forward and downward, and the aerogel felt is kept from the back facing the detection area and then transmitted downward; finally, the same principle as the removal of the broken needles on the front side is adopted, and the aerogel felt transmitted downward enters 1, 2...N levels in turn, and the extrusion force and adsorption force formed become larger step by step. After adsorption, the aerogel felt enters the detection area for re-inspection and continues to be transmitted downward to complete the removal of the broken needles on the back side. Therefore, Compared with the prior art, the present invention is based on, on the one hand, sequentially processing the broken needles on the front and back sides of the aerogel felt, and adopts repeated extrusion to expand the needle holes during the processing, so as to loosen the broken needles relative to the aerogel felt, and at the same time, the corresponding magnetic attraction is used to complete the removal of the broken needles. In addition, the broken needles are removed step by step according to the classification to meet the operation needs of different difficulty levels, that is, it is suitable for the removal of broken needles of aerogel felts of different thicknesses and different lengths; on the other hand, transfer is used to achieve the connection between the processing of the front and back sides of the aerogel felt, and the same removal method is used to remove the broken needles on the back side step by step, so as to improve the quality of the aerogel felt, and at the same time, the outflow of products containing broken needles is avoided in the final review of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the process flow of this embodiment;

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

[0030] Figure 3 for Figure 2 Schematic diagram of top view;

[0031] Figure 4 for Figure 2 The left side schematic diagram of the broken needle removal device in the middle front;

[0032] Figure 5 for Figure 2 A schematic diagram of the structure of the broken needle removal device on the middle front (the direction of the arrow is the transmission direction of the aerogel felt);

[0033] Figure 6 for Figure 2 A magnified schematic diagram of the structure of the broken needle removal device on the middle and back sides (the direction of the arrow is the transmission direction of the aerogel felt);

[0034] Wherein: 1. front broken needle removal device; 10. front magnetic force detection unit; 11. first operating station; 110. first operating platform; 111. first ejector component; 112. first magnetic attraction component;

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

[0036] a, ejector assembly; a1, ejector rod; a2, external seat; b, magnetic adsorption assembly; b1, mounting seat; b2, magnetic rod; g1, fixing seat; g2, magnetic transmission roller; g3, magnetic sensor;

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

[0038] M. Aerogel felt. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0040] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] In the present application, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in 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 may be directly on the other element or there may be a central element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0044] like Figure 1 As shown, the present embodiment is applicable to a process for removing broken needles of different thicknesses and different lengths of aerogel felts, and includes 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. At the same time, it is subjected to step-by-step extrusion treatment before being transported to the detection area. The step-by-step extrusion treatment is divided into 1, 2...N levels according to the length of the broken needles. Each level of extrusion adopts the process of tensioning and transmitting the aerogel felt to extrude the broken needles of different lengths back and forth in the thickness direction of the aerogel felt to expand the pinholes. Each level of extrusion adopts step-by-step adsorption. At the same time, the extrusion force and adsorption force formed increase step by step from the increase of 1, 2...N levels. After adsorption, the aerogel felt enters the detection area for re-inspection and continues to be transported upward to complete the removal of the broken needles on the front side.

[0047] S2. Aerogel felt connection transmission

[0048] The aerogel felt transported upward is guided by the transfer roller, and the aerogel felt is driven forward and downward, and the aerogel felt is kept from the back side facing the detection area and then transported downward;

[0049] S3, remove broken needles from the back

[0050] Using the same principle as removing broken needles on the front side, the aerogel felt transmitted downward enters levels 1, 2...N in sequence. At the same time, the extrusion force and adsorption force formed increase step by step. After adsorption, the aerogel felt enters the inspection area for re-inspection and continues to be transmitted downward to complete the removal of broken needles on the back side.

[0051] Combination Figures 2 to 6 As shown, the broken needle removal system used in the above-mentioned removal process includes a front broken needle removal device 1, a back broken needle removal device 2, and a cloth turning device 3, wherein the front broken needle removal device 1 and the back broken needle removal device 2 both adopt two-stage broken needle removal processing (i.e., N=2).

[0052] Specifically, the front broken needle removal device 1 includes a front magnetic detection unit 10 and a first operating station 11. The aerogel felt M is transferred from the front side to the front detection area of ​​the front magnetic detection unit 10 from bottom to top. The first operating station 11 includes a first operating platform 110, a first ejector component 111 formed at the feed end of the front detection area, and a first magnetic attraction component 112 arranged corresponding to the first ejector component 111. The first ejector component 111 extends along the width direction of the aerogel felt M, and contacts the front and / or back of the aerogel felt M to put the aerogel felt M in a tensioned state to repeatedly and multiple times eject the broken needle out of the aerogel felt M. The first magnetic attraction component 111 is close to the end where the broken needle emerges, and absorbs the broken needle.

[0053] In some specific embodiments, the first ejector pin component 111 includes a plurality of ejector pin groups a whose ejection contact force increases gradually from bottom to top, and each ejector pin group a has at least three broken pin extrusion points; the first magnetic attraction component 112 includes a magnetic attraction group b corresponding to each ejector pin group a. The three broken pin extrusion points form at least three extrusions to achieve repeated extrusion of the front and back sides (of course, the number of broken pin extrusion points can be four, five or more), which enlarges the pinhole and facilitates magnetic attraction (effectively removing broken pins).

[0054] In this example, each ejector pin group a includes a plurality of ejector pins a1 that are relatively spaced apart in the vertical direction and in the thickness direction of the aerogel felt M, and an external seat a2 for relatively fixing the plurality of ejector pins a1 from the end, wherein the aerogel felt M passes through the plurality of ejector pins a1 from bottom to top in the thickness direction of the aerogel felt M so that a V-shaped pointed angle support is formed between every three of them, and the aerogel felt M is ejected outward by the tip of the V-shaped pointed angle, and the magnetic adsorption group b is correspondingly arranged at the tip of the V-shaped pointed angle. The extrusion using a V-shaped angle will not cause damage to the aerogel felt due to broken needles, and is more conducive to the ejection operation. The cross-section of the ejector pin a1 is circular, elliptical or triangular; in the present application, there are three ejector pins a1, and the centers of the three ejector pins are distributed in an isosceles triangle in their own axial projection. Such a layout is more conducive to the fitting of the aerogel felt, and is also conducive to the extrusion of broken needles. The magnetic adsorption group b includes two mounting seats b1 located on both sides, and a magnetic rod b2 installed between the two mounting seats b1 from the end, wherein the magnetic rod b2 is distributed corresponding to the tip. The layout of the magnetic rod corresponding to the tip is more conducive to the adsorption of the broken needle. Each magnetic adsorption group b of the first magnetic adsorption component 112 is located on the same side of the aerogel felt M and is located on the relatively outer side of the external seat a2. This is very convenient for the installation of the magnetic adsorption group.

[0055] The back-side broken needle removal device 2 includes a back-side magnetic detection unit 20 that is the same as the front-side magnetic detection unit 10, and a second operating station 21 that is the same as the first operating station 11, wherein the back-side magnetic detection unit 20 is located below the discharge end of the second ejector component 211 of the second operating station 21, and 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 component 211 extends along the width direction of the aerogel felt M, and contacts the front and / or back side of the aerogel felt M to put the aerogel felt M in a tensioned state to repeatedly and multiple times eject the broken needle out of the aerogel felt M, and the second magnetic attraction component 212 is close to the end where the broken needle emerges, and absorbs 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 layout: 1) The V-shaped angle formed by the tips of each ejector group a of the first ejector component 111 has a gradually smaller adsorption force from bottom to top; the angle formed by the tips of each ejector group of the second ejector component 211 has a gradually smaller adsorption force from bottom to top. In this way, 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 removed first and then the difficult ones, reducing the probability of missing broken needles.

[0057] 2) The adsorption force of each magnetic adsorption group of the first magnetic attraction component 111 increases gradually from bottom to top; the adsorption force of each magnetic adsorption group of the second magnetic attraction component 211 increases gradually from top to bottom. As the adsorption difficulty increases, the required adsorption force is greater.

[0058] 3) The distance from each magnetic attraction group of the first magnetic attraction component 111 to the tip gradually decreases from bottom to top; the attraction force of each magnetic attraction group of the second magnetic attraction component 211 gradually decreases from top to bottom. Further, according to the layout of different spacing distances, the optimal attraction force is further improved.

[0059] As for the magnetic detection unit (the front magnetic detection unit 10 or the back magnetic detection unit 20 has the same structure), it includes a fixing seat g1, a magnetic transmission roller g2, and a magnetic sensor g3, wherein the magnetic sensor g3 performs magnetic detection on the aerogel felt after being processed by the operating station and can give an alarm. In short, the magnetic detection unit is the last guarantee. As long as it is detected, the probability of broken needles in the aerogel felt is basically zero; and once an alarm is given, it means that it has failed to be adsorbed and removed. At this time, emergency treatment can only be performed manually.

[0060] In addition, the cloth turning device 3 is located between the front broken needle removing device 1 and the back broken needle removing device 2, and is used to turn the aerogel felt M between the front and back sides through the second ejector pin component 211.

[0061] Specifically, the cloth turning device 3 includes a turning seat 30 located on the top of the first operating platform 110 and the second operating platform 210, a plurality of turning rollers 31 arranged in parallel mounted on the turning seat 30, and a turning motor 32 driving any one or more turning rollers 31 to rotate, wherein the aerogel felt M is transmitted from the back side downward and inward to the second ejector component 211 under the self-rotation transmission of the plurality of turning rollers 31, and is transmitted downward with the back side facing the back detection area. Generally, there are three turning rollers, which are distributed in a triangular shape, and only one of them needs to be driven, and the remaining two can rotate with the rotation.

[0062] In summary, after adopting the removal process, first, the aerogel felt faces the detection area from the front and is transmitted from bottom to top, and at the same time, a step-by-step extrusion process is performed before being transmitted to the detection area, wherein the step-by-step extrusion process is divided into 1, 2...N levels according to the length of the broken needle, and each level of extrusion adopts the process of tensioning and transmitting the aerogel felt to extrude the broken needles of different lengths back and forth in the thickness direction of the aerogel felt to expand the pinhole, and each level of extrusion adopts step-by-step adsorption, and at the same time, from the increase of 1, 2...N levels, the extrusion force and adsorption force formed become larger step by step. After adsorption, the aerogel felt enters the detection area for re-inspection and continues to be transmitted upward to complete the removal of the broken needle on the front; secondly, the aerogel felt transmitted upward is guided by the transfer transmission roller, and the aerogel felt is transported to the detection area. The gel felt is transmitted forward and downward, and the aerogel felt is kept transmitting downward from the back side toward the detection area; finally, the aerogel felt transmitted downward is sequentially entered into 1, 2...N stages by the same principle as the front side for removing the broken needles, and the extrusion force and adsorption force formed are gradually increased. After adsorption, the aerogel felt enters the detection area for re-inspection and continues to be transmitted downward to complete the removal of the broken needles on the back side. Therefore, compared with the prior art, the present invention is based on, on the one hand, sequentially processing the broken needles on the front and back sides of the aerogel felt, and repeatedly extruding is used to expand the needle holes during the processing, so as to loosen the broken needles relative to the aerogel felt, and at the same time, the corresponding magnetic attraction is used to complete the removal of the broken needles. In addition, the removal is performed step by step according to the classification to meet the different difficulties. On the other hand, it adopts transfer to achieve the connection between the front and back processing of the aerogel felt, and adopts the same removal method to remove the broken needles on the back step by step, so as to improve the quality of the aerogel felt, and at the same time, in the final review of the test, it avoids the outflow of products containing broken needles; on the third aspect, the front and back double stations are used to extrude the front and back sides of the aerogel felt in turn, and the broken needles and the aerogel felt are relatively loosened by repeated ejection in the extrusion process to expand the pinhole, and then the broken needles are removed by combining magnetic adsorption, that is, it not only meets the needs of removing broken needles of aerogel felts of different thicknesses, but also the broken needles of different lengths can be effectively ejected, and no manual labor is required, and it is efficient 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 caused by missed broken needles; on the fourth hand, the three broken needle extrusion points form at least three extrusions to achieve repeated extrusion of the front and back sides (of course, the broken needle extrusion points can be four, five or more), which makes the pinhole larger, thereby facilitating magnetic adsorption (effectively implementing broken needle removal); on the fifth hand, the V-shaped angle of extrusion is used, which will not cause damage to the aerogel felt due to broken needles, and is more conducive to ejection operation. At the same time, with the transmission of the aerogel felt, broken needles of different lengths can be effectively extruded under the action of different extrusion forces, and the easy ones are first and then the difficult ones, reducing the probability of missed broken needle removal;In the sixth aspect, the layout of the magnetic rod corresponding to the tip is more conducive to the adsorption of broken needles. At the same time, as the difficulty of adsorption increases, the adsorption force required is greater. In addition, according to the layout of different intervals, the optimal adsorption strength is further improved; the biggest advantage of the grading (1, 2...N) adopted in the seventh aspect is that the broken needles are removed step by step from the simple to the difficult, so as to avoid the leakage of broken needles of different lengths causing mutual interference during the removal process. It should be known that the shorter the needle, the more difficult it is to remove. Therefore, the shorter the needle, the more times it needs to be squeezed out, so that the broken needle can be removed optimally. ;

[0063] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A process for removing broken needles of different thicknesses of aerogel felts and different lengths, characterized in that: It includes the following steps: S1, remove broken needles from the front The aerogel felt is transported from the front to the detection area and from bottom to top. At the same time, it is subjected to step-by-step extrusion treatment before being transported to the detection area. The step-by-step extrusion treatment is divided into 1, 2...N levels according to the length of the broken needles. Each level of extrusion adopts the process of tensioning and transmitting the aerogel felt to extrude the broken needles of different lengths back and forth in the thickness direction of the aerogel felt to expand the pinholes. Each level of extrusion adopts step-by-step adsorption. At the same time, the extrusion force and adsorption force formed increase step by step from the increase of 1, 2...N levels. After adsorption, the aerogel felt enters the detection area for re-inspection and continues to be transported upward to complete the removal of the broken needles on the front side. S2. Aerogel felt connection transmission The aerogel felt transported upward is guided by the transfer roller, and the aerogel felt is driven forward and downward, and the aerogel felt is kept from the back side facing the detection area and then transported downward; S3, remove broken needles from the back Using the same principle as removing broken needles on the front side, the aerogel felt transmitted downward enters levels 1, 2...N in sequence. At the same time, the extrusion force and adsorption force formed increase step by step. After adsorption, the aerogel felt enters the inspection area for re-inspection and continues to be transmitted downward to complete the removal of broken needles on the back side.

2. The process for removing broken needles of aerogel felts of different thicknesses and different lengths according to claim 1 is characterized in that: The front broken needle removal device used in step S1 includes a front magnetic detection unit and a first operating station. The aerogel felt is transferred from the front side to the front detection area of ​​the front magnetic detection unit from bottom to top. The first operating station includes a first operating platform, a first ejector component formed at the feed end of the front detection area, and a first magnetic attraction component arranged corresponding to the first ejector component. The first ejector component extends along the width direction of the aerogel felt and contacts the front and / or back of the aerogel felt to put the aerogel felt in a tensioned state to repeatedly and multiple times eject the broken needle out of the aerogel felt. The first magnetic attraction component is close to the end where the broken needle emerges and absorbs the broken needle.

3. The process for removing broken needles of aerogel felts of different thicknesses and different lengths according to claim 2 is characterized in that: The first ejector pin component includes a plurality of ejector pin groups whose ejection contact force increases gradually from bottom to top, and each ejector pin group has at least three broken pin extrusion points; the first magnetic attraction component includes a magnetic attraction group corresponding to each ejector pin group one by one.

4. The process for removing broken needles of aerogel felts of different thicknesses and different lengths according to claim 3 is characterized in that: Each of the ejector pin groups includes a plurality of ejector pins relatively spaced apart in the up-down direction and in the thickness direction of the aerogel felt, and an external connection seat for relatively fixing the plurality of ejector pins from the ends thereof, wherein the aerogel felt passes through the plurality of ejector pins from bottom to top in the thickness direction of the aerogel felt so as to form a V-shaped pointed-angle ejection support between every three of the ejector pins, and the aerogel felt is ejected outward by the tip of the V-shaped pointed angle, and the magnetic adsorption group is correspondingly arranged at the tip of the V-shaped pointed angle.

5. The process for removing broken needles of aerogel felts of different thicknesses and different lengths according to claim 4 is characterized in that: The V-shaped angle formed by the tips of each ejector group of the first ejector component has an adsorption force that gradually decreases from bottom to top; and / or, the magnetic adsorption group includes two mounting seats located on both sides, and a magnetic rod installed between the two mounting seats from the end, wherein the magnetic rod is distributed correspondingly to the tip.

6. The process for removing broken needles of aerogel felts of different thicknesses and different lengths according to claim 5 is characterized in that: 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 orthographic projection.

7. The process for removing broken needles of aerogel felts of different thicknesses and different lengths according to claim 5 is characterized in that: The adsorption force of each magnetic adsorption group of the first magnetic attraction component increases step by step from bottom to top; and / or the distance from each magnetic adsorption group of the first magnetic attraction component to the tip decreases step by step from bottom to top.

8. The process for removing broken needles of aerogel felts of different thicknesses and different lengths according to claim 1 is characterized in that: The cloth turning device used in step S2 includes a turning seat located on the top of the first operating platform and the second operating platform, a plurality of parallel turning rollers installed on the turning seat, and a turning motor driving any one or more turning rollers to rotate, wherein the aerogel felt is transmitted from the back side downward and inward toward the second ejector component under the self-rotation transmission of the plurality of turning rollers, and is transmitted downward 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.

9. The process for removing broken needles of aerogel felts of different thicknesses and different lengths according to claim 1, characterized in that: 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, wherein the back-side magnetic detection unit is located below the discharge end of the second ejector component of the second operating station, and the aerogel felt passes through the second operating station and the back-side magnetic detection unit from top to bottom, the second ejector component extends along the width direction of the aerogel felt, and contacts the front and / or back side of the aerogel felt to put the aerogel felt in a tensioned state to repeatedly and multiple times eject the broken needle out of the aerogel felt, and the second magnetic attraction component is close to the end where the broken needle emerges, and absorbs the broken needle.

10. The process for removing broken needles of aerogel felts of different thicknesses and different lengths according to claim 9, characterized in that: The angle formed by the tips of the ejector pin groups of the second ejector pin component gradually decreases in adsorption force from bottom to top; and / or, the adsorption force of the magnetic adsorption groups of the second magnetic adsorption component gradually increases from top to bottom; and / or, the adsorption force of the magnetic adsorption groups of the second magnetic adsorption component gradually decreases in adsorption force from top to bottom.

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