Full-automatic online detection device for linear density of glass fiber yarns

Abstract

The invention provides a full-automatic glass fiber yarn linear density online detection device, and solves the problems of large error and low efficiency caused by manual yarn cutting and weighing in the prior art. The invention discloses a full-automatic glass fiber yarn linear density online detection device. Comprising a baffle used for positioning yarn, a positioning structure arranged below the baffle and used for positioning the yarn, a yarn shifting structure arranged between the baffle and the positioning structure and used for shifting the yarn, a pressing structure matched with the positioning structure to press the yarn, a cutting structure used for cutting the yarn and a weighing structure used for weighing. After yarn pulling, the pressing structure is matched with the positioning structure to press the yarn, the yarn pulling structure is matched with the positioning structure to straighten the yarn after pressing, the yarn is cut off by the cut-off structure after straightening, and the cut-off yarn is weighed by the weighing structure. The device has the advantages of high automation degree, high efficiency and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of glass fiber processing and relates to a full-automatic online detection device for glass fiber yarn linear density. Background Art

[0002] During the production process of finished glass fiber yarn balls, the paper tube core at the center of the yarn ball must be removed, and the waste yarn on the paper tube and in the center of the yarn ball must be removed. The yarn weight per unit length must also be measured. Currently, paper tube extraction equipment is used to automatically extract the paper tube, improving safety and work efficiency.

[0003] For example, a Chinese patent discloses a paper tube and silk thread extraction device [application publication number CN115806224A], which includes a frame on which a yarn roll positioning mechanism, a paper tube extraction mechanism, a silk thread extraction and cutting mechanism, and a paper tube boxing mechanism are installed. The yarn roll positioning mechanism is used to clamp and position the yarn roll, the paper tube extraction mechanism is used to extract the paper tube from the yarn roll, the silk thread extraction and cutting mechanism is used to gather, cut and peel the silk thread, and the paper tube boxing mechanism is used to place the paper tube in the boxing position on the paper tube shelf.

[0004] The above-mentioned equipment does not have a weight detection mechanism for yarn per unit length. The yarn weight detection process relies on manual cutting of fixed-length samples and transferring them to a scale for weighing. This method has significant defects: manual cutting can easily introduce length errors, resulting in deviations in the calculation of linear density; the sampling efficiency is low, which restricts the overall production efficiency. Summary of the Invention

[0005] The purpose of the present invention is to solve the above problems in the existing technology and to provide a fully automatic online detection device for the linear density of glass fiber yarn with a high degree of automation.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] The fully automatic online detection device for the linear density of glass fiber yarn is located between the yarn ball conveying line and the yarn winding mechanism. It includes a baffle for positioning the yarn, a positioning structure for positioning the yarn provided below the baffle, a wire-drawing structure for moving the yarn provided between the baffle and the positioning structure, a pressing structure that cooperates with the positioning structure to compress the yarn, a cutting structure for cutting the yarn, and a weighing structure for weighing. After wire drawing, the pressing structure cooperates with the positioning structure to compress the yarn. After compaction, the wire-drawing structure cooperates with the positioning structure to straighten the yarn. After straightening, the cutting structure cuts the yarn, and the cut yarn is weighed by the weighing structure.

[0008] The structure of the yarn ball conveying line and the yarn winding mechanism is described in detail in the applicant's previous patent (application number 202510831619.5), and will not be repeated here.

[0009] The yarn ball conveyor line is used to convey the yarn ball. After the paper tube on the yarn ball conveyor line is pulled upward, the yarn winding mechanism between the yarn ball and the paper tube is rolled up and the yarn is completely separated from the paper tube. Then the yarn winding mechanism moves along the conveying direction of the yarn ball conveyor line together with the yarn ball. When the yarn moves to the baffle and is positioned by the baffle, the yarn ball and the yarn winding mechanism are positioned at the current position; then the wire drawing structure draws the yarn in the horizontal direction so that the yarn between the baffle and the positioning structure is folded into a U shape horizontally. During this process, the yarn in the yarn ball below is continuously pulled out; the U-shaped yarn includes an upper part extending obliquely downward and a lower part extending obliquely upward, and the upper part intersects with the lower part. At the point of action of the wire drawing structure and the yarn; when the wire drawing structure moves into place, the pressing structure presses down to press down the upper part of the U-shaped yarn, and then presses down the lower part of the U-shaped yarn, and presses the upper and lower parts of the U-shaped yarn onto the positioning structure at the same time to achieve the initial positioning of the U-shaped yarn. At this time, the pressing force on the yarn is small, and the yarn can move between the pressing structure and the positioning structure when the wire drawing structure and the positioning structure move relative to each other; then, the yarn is straightened under the action of the wire drawing structure and the positioning structure, and after straightening, the yarn is further clamped to achieve the final positioning of the yarn; then the cutting structure moves to cut the yarn at the set position, and the cut yarn enters the weighing structure for weighing.

[0010] The fully automatic glass fiber yarn linear density online detection device automatically cuts the yarn into segments of specified lengths and weighs them using a weighing structure, with a high degree of automation and high efficiency.

[0011] In the above-mentioned fully automatic online detection device for the linear density of glass fiber yarn, a guide port is provided on the baffle to facilitate the entry of the yarn, and the end of the guide port has a positioning groove connected to the guide port, and the positioning groove extends along the conveying direction of the yarn ball conveying line. The angle between the wire drawing direction of the wire drawing structure and the extension direction of the positioning groove is an acute angle or a right angle.

[0012] The guide opening guides the yarn into the positioning groove, which positions the yarn and effectively prevents the yarn from falling off the baffle during the drawing process. Since the angle between the drawing direction and the extension direction of the positioning groove is an acute angle or a right angle, the yarn can be further prevented from falling off.

[0013] In the above-mentioned fully automatic online glass fiber yarn linear density detection device, the positioning structure includes a base and a fixed clamping jaw fixed to the base. The upper surface of the fixed clamping jaw is flat, and the wire drawing path of the wire drawing structure is located directly above the upper surface of the fixed clamping jaw. The pressing structure is located squarely on the upper surface of the fixed clamping jaw to facilitate pressing the yarn against the upper surface of the fixed clamping jaw.

[0014] In the above-mentioned fully automatic online detection device for glass fiber yarn linear density, the fixed jaws are located at the front and rear ends of the wire drawing structure in the wire drawing direction, each with a first clamping block protruding upward from the upper surface of the fixed jaws. A movable jaw and a first linear drive member that drives the movable jaws are slidably provided on the base. The movable jaws are located at the front and rear ends of the wire drawing structure in the wire drawing direction, each with a second clamping block that forms a clamping action with the first clamping block. When the yarn is straightened, the movable jaw, under the action of the first linear drive member, approaches the fixed jaw, allowing the second clamping block to clamp the yarn together with the first clamping block. The straightened yarn is clamped by the first and second clamping blocks, facilitating subsequent cutting.

[0015] In the above-mentioned fully automatic online detection device for the linear density of glass fiber yarn, the upper part of the fixed jaw close to the movable jaw has a support plate whose upper surface is flush with the upper surface of the fixed jaw, and the movable jaw is arranged below the support plate. The wire drawing path of the wire drawing structure is located directly above the support plate, and when clamping the wire, the support plate is located between the two second clamping blocks.

[0016] The support plate increases the area of ​​the upper surface of the fixed clamping jaw, ensuring that the yarn can be accurately pressed down on the upper surface of the fixed clamping jaw after the wire drawing. The second clamping blocks are located at both ends of the support plate, which can clamp the yarn pressed on the upper surface of the fixed clamping jaw, and the structural design is reasonable.

[0017] In the above-mentioned fully automatic online detection device for the linear density of glass fiber yarn, a transverse guide rail extending perpendicular to the wire drawing direction is provided on the base, a first slider is slidably fitted on the transverse guide rail, a mounting seat driven by the above-mentioned first linear drive member is installed on the first slider, a connecting rod extending along the length direction of the transverse guide rail is slidably fitted on the mounting seat, the movable jaw is fixed to one end of the connecting rod close to the fixed jaw, a spring is sleeved on the connecting rod, one end of the spring acts on the movable jaw, and the other end acts on the mounting seat.

[0018] When the first linear drive member is working, it drives the mounting seat to slide along the transverse guide rail, so that the movable jaw rests against the fixed jaw. As the first linear drive member continues to move, the spring is compressed, and the force of the spring acts on the movable jaw, causing the movable jaw to clamp the yarn.

[0019] In the above-mentioned fully automatic online detection device for the linear density of glass fiber yarn, the first clamping block and the second clamping block are respectively provided with a clearance groove extending perpendicular to the wire drawing direction. When the first clamping block and the second clamping block are clamped, the two clearance grooves form a clearance space, and the cutting structure cuts / cuts the yarn in the clearance space by sawing / shearing.

[0020] In the above-mentioned fully automatic online detection device for the linear density of glass fiber yarn, the cutting structure includes a rotating power part provided on a mounting seat and a cutter disc driven by the rotating power part. The axis of the cutter disc extends along the wire drawing direction of the wire drawing structure. When the movable jaw abuts against the fixed jaw, the mounting seat continues to slide under the action of the first linear drive member, driving the rotating power part and the cutter disc to move. The cutter disc gradually enters the makeshift space and cuts the tensioned yarn by sawing.

[0021] In the above-mentioned fully automatic online glass fiber yarn density detection device, the base is driven by a second linear drive member, the driving direction of which is parallel to the wire drawing direction of the wire drawing mechanism. When the yarn is pressed against the upper surface of the fixed clamping jaw, the second linear drive member drives the base away from the wire drawing mechanism, thereby straightening the yarn. The straightened yarn is then clamped by the first and second clamping blocks.

[0022] In the above-mentioned fully automatic online detection device for glass fiber yarn linear density, the pressing structure includes a third linear drive member provided on the mounting seat and extending vertically and a pressing plate driven by the third linear drive member, and the pressing plate extends horizontally perpendicular to the wire drawing direction.

[0023] In the above-mentioned fully automatic online detection device for glass fiber yarn linear density, the third linear drive member is provided with a vertical guide rail, on which a second slider is slidably engaged. The lower end of the telescopic end of the third linear drive member is fixedly connected to the second slider, and the pressure plate is provided on the second slider. The vertical guide rail and the second slider improve the stability of the downward pressure of the pressure plate.

[0024] In the above-mentioned fully automatic online detection device for glass fiber yarn linear density, the lower surface of the pressing plate is a cylindrical surface, the generatrix of which extends horizontally perpendicular to the drawing direction. The cylindrical surface reduces the contact area with the yarn and avoids yarn wear.

[0025] In the above-mentioned fully automatic online detection device for linear density of glass fiber yarn, the wire drawing structure includes a fourth linear driving member and a wire drawing rod driven by the fourth linear driving member, and the wire drawing rod extends horizontally perpendicular to the wire drawing direction.

[0026] The above-mentioned fully automatic online detection device for the linear density of glass fiber yarn also includes a fifth linear drive member arranged to be inclined from bottom to top along the wire drawing direction, a support seat arranged on the fifth linear drive member and driven by the fifth linear drive member, a check rod hinged on the support seat and a torsion spring acting on the check rod, the check rod is in an initial state under the action of the torsion spring, the check rod in the initial state is parallel to the wire drawing rod, and when the wire is drawn, the check rod is located at the lower part of the fifth linear drive member and is at the same height as the wire drawing rod, the wire drawing rod can overwhelm and pass over the check rod, and when the wire drawing rod is drawn into place, the check rod is reset under the action of the torsion spring and limits the yarn to the side of the check rod away from the positioning structure, and the weighing structure is located at the upper part of the fifth linear drive member.

[0027] The fifth linear drive can transport the cut yarn to the weighing structure.

[0028] In the above-mentioned fully automatic online detection device for the linear density of glass fiber yarn, the weighing structure includes a balance, and a hook extending to the upper part of the fifth linear drive member is provided under the balance. When the check rod moves to the upper part of the fifth linear drive member, the check rod and the hook are arranged opposite each other, and the hook is provided with a first drive member for pushing the yarn on the check rod to the hook and a second drive member for pushing the yarn on the hook away from the hook.

[0029] In the above-mentioned fully automatic online detection device for glass fiber yarn linear density, the side of the check rod away from the positioning structure has a groove, one end of the torsion spring acts in the groove, and the other end of the torsion spring acts on the support seat.

[0030] Compared with the existing technology, the present fully automatic online detection device for the linear density of glass fiber yarn has the following advantages: the present fully automatic online detection device for the linear density of glass fiber yarn is integrated in the yarn ball paper tube drawing device, and the yarn density is fully automatically detected online after the paper tube is drawn (the volume can be calculated when the yarn diameter and length are known, and the density is obtained by dividing the weight by the volume); the sawing method after tensioning is more reliable than shearing, and multiple yarns can be cut off; it is isolated from other components by a baffle, and has high reliability; the yarn is automatically cut into segments of specified length by the present fully automatic online detection device for the linear density of glass fiber yarn, and is weighed by a weighing structure, with a high degree of automation and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural diagram of a fully automatic online detection device for glass fiber yarn linear density.

[0032] Figure 2 This is a structural diagram of a fully automatic online detection device for glass fiber yarn linear density without the baffle.

[0033] Figure 3It is a structural diagram of the support seat, check rod and hook.

[0034] Figure 4 It is a structural diagram of the positioning structure.

[0035] Figure 5 It is another structural diagram of the positioning structure.

[0036] Figure 6 yes Figure 4 The structural diagram when the cutting structure is omitted.

[0037] Figure 7 yes Figure 6 Schematic diagram of the structure when the movable clamping jaw is omitted.

[0038] Figure 8 It is another structural diagram of the positioning structure.

[0039] Figure 9 This is another structural diagram when the positioning structure omits the movable clamping claw.

[0040] In the figure, 1. baffle; 11. guide port; 12. positioning groove; 2. positioning structure; 20. base; 21. fixed clamping jaw; 211. first clamping block; 212. support plate; 22. movable clamping jaw; 221. second clamping block; 23. first linear drive member; 24. transverse guide rail; 25. mounting seat; 26. connecting rod; 27. spring; 28. second linear drive member; 3. wire drawing structure; 31. fourth linear drive member; 32. wire drawing rod; 4. clamping structure; 41. third linear drive member; 42. pressure plate; 43. vertical guide rail; 44. second slider; 5. cutting structure; 51. rotating power member; 52. cutter head; 53. make way slot; 6. weighing structure; 61. hook; 71. fifth linear drive member; 72. support seat; 73. check rod; 74. torsion spring; 81. first drive member; 82. second drive member. DETAILED DESCRIPTION

[0041] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0042] The fully automatic online detection device for the linear density of glass fiber yarn is located between the yarn ball conveying line and the yarn winding mechanism. The structures of the yarn ball conveying line and the yarn winding mechanism are described in detail in the applicant's previous patent (application number 202510831619.5), and will not be repeated in this embodiment.

[0043] like Figure 1The fully automatic online detection device for the linear density of glass fiber yarns shown includes a baffle 1 for positioning the yarn, a positioning structure 2 for positioning the yarn, located below the baffle 1, a wire drawing structure 3 for moving the yarn, located between the baffle 1 and the positioning structure 2, a pressing structure 4 that cooperates with the positioning structure 2 to compact the yarn, a cutting structure 5 for cutting the yarn, and a weighing structure 6 for weighing. The positioning structure 2, wire drawing structure 3, pressing structure 4, and cutting structure 5 are located below the baffle 1, improving safety. After the yarn is drawn, the pressing structure 4 cooperates with the positioning structure 2 to compact the yarn. After compaction, the wire drawing structure 3 cooperates with the positioning structure 2 to straighten the yarn. After straightening, the cutting structure 5 cuts the yarn, and the cut yarn is weighed by the weighing structure 6.

[0044] like Figure 1 As shown, the baffle 1 is provided with a guide opening 11 for convenient yarn entry, and the end of the guide opening 11 has a positioning groove 12 connected to the guide opening 11, and the positioning groove 12 extends along the conveying direction of the yarn ball conveying line. The wire drawing direction of the wire drawing structure 3 extends horizontally and the angle between it and the extension direction of the positioning groove 12 is an acute angle or a right angle. In this embodiment, as shown in FIG. Figure 1 As shown, the angle between the wire drawing direction of the wire drawing structure 3 and the extending direction of the positioning groove 12 is an acute angle.

[0045] The yarn is positioned by the positioning groove 12, which can effectively prevent the yarn from falling off the baffle 1 during the drawing process. Since the angle between the drawing direction and the extending direction of the positioning groove 12 is an acute angle or a right angle, the yarn can be further prevented from falling off.

[0046] like Figure 4-9 As shown, the positioning structure 2 includes a base 20 and a fixed jaw 21 fixedly connected to the base 20. The upper surface of the fixed jaw 21 is a plane. The wire drawing path of the wire drawing structure 3 is located directly above the upper surface of the fixed jaw 21, and the clamping structure 4 is also located squarely on the upper surface of the fixed jaw 21.

[0047] like Figure 4-9 As shown, the base 20 is driven by the second linear drive member 28. The second drive member 82 in this embodiment is a rodless cylinder. When the rodless cylinder is actuated, it can drive the base 20 to move, and its moving direction is parallel to the wire drawing direction of the wire drawing structure 3.

[0048] like Figure 5 and Figure 8 As shown, the fixed clamping jaw 21 is located at the front and rear ends of the wire drawing structure 3 in the wire drawing direction, and a first clamping block 211 protruding upward from the upper surface of the fixed clamping jaw 21 is respectively provided. A movable clamping jaw 22 and a first linear driving member 23 that drives the movable clamping jaw 22 are slidably provided on the base 20. The first linear driving member 23 is a cylinder. When the piston rod of the cylinder is extended or retracted, it can drive the movable clamping jaw 22 to move closer to or away from the fixed clamping jaw 21. Figure 6As shown, the movable clamping jaw 22 is located at the front and rear ends in the wire drawing direction, and is respectively provided with a second clamping block 221 that forms a clamping action with the first clamping block 211. When the yarn is straightened, the movable clamping jaw 22 is close to the fixed clamping jaw 21 under the action of the first linear drive member 23 so that the second clamping block 221 and the first clamping block 211 clamp the yarn.

[0049] In order to achieve the abdication, Figure 7 As shown, a support plate 212 whose upper surface is flush with the upper surface of the fixed jaw 21 is provided on the upper part of the fixed jaw 21 close to the movable jaw 22, and the upper end of the movable jaw 22 is not higher than the lower surface of the support plate 212. The wire drawing path of the wire drawing structure 3 is located directly above the support plate 212. When clamping the wire, the support plate 212 is located between the two second clamping blocks 221.

[0050] In order to improve the smoothness of movement, Figure 4 、 Figure 6 and Figure 7 As shown, the base 20 is provided with a transverse guide rail 24 extending perpendicular to the wire drawing direction, and a first slider is slidably fitted on the transverse guide rail 24, and a mounting seat 25 driven by a first linear drive member 23 is installed on the first slider, and a connecting rod 26 extending along the length direction of the transverse guide rail 24 is slidably fitted on the mounting seat 25. The movable jaw 22 is fixed to one end of the connecting rod 26 close to the fixed jaw 21, and a spring 27 is sleeved on the connecting rod 26, one end of the spring 27 acts on the movable jaw 22, and the other end acts on the mounting seat 25, and a limit stop edge is provided at the end of the connecting rod 26 away from the movable jaw 22. When the mounting seat 25 retreats under the action of the first linear drive member 23, it abuts against the limit stop edge, thereby pulling the connecting rod 26 and the movable jaw 22 back together.

[0051] In order to further improve the stability of the movement of the movable clamping jaw 22, as Figure 6-7 As shown, a third slider is slidably provided on the transverse guide rail 24 , and the movable clamping jaw 22 is fixed on the third slider.

[0052] like Figure 4-5 、 Figure 8-9 As shown, the cutting structure 5 includes a rotating power member 51 provided on the mounting seat 25 and a cutter head 52 driven by the rotating power member 51. The rotating member is a servo motor. The axis of the cutter head 52 extends along the wire drawing direction of the wire drawing structure 3. Figure 8 As shown, the first clamping block 211 and the second clamping block 221 arranged close to the cutter disc 52 are respectively provided with a clearance groove 53 for the cutter disc 52 to enter. The two clearance grooves 53 are arranged opposite to each other. When the first clamping block 211 and the second clamping block 221 are clamped, the two clearance grooves 53 form a clearance space.

[0053] like Figure 6-9As shown, the pressing structure 4 includes a third linear drive member 41 provided on the mounting seat 25 and extending vertically, and a pressure plate 42 driven by the third linear drive member 41. The third linear drive member 41 is a cylinder, and the pressure plate 42 is fixed to the lower end of the cylinder piston rod, and the pressure plate 42 extends horizontally perpendicular to the wire drawing direction. In order to improve stability, as shown in FIG. Figure 8 As shown, a vertical guide rail 43 is provided on the third linear drive member 41 , and a second slider 44 is slidably fitted on the vertical guide rail 43 . The lower end of the telescopic end of the third linear drive member 41 is fixedly connected to the second slider 44 , and the pressure plate 42 is provided on the second slider 44 .

[0054] To avoid abrasion of the yarn, e.g. Figure 8-9 As shown, the lower surface of the pressing plate 42 is a cylindrical surface, and the generatrix of the cylindrical surface extends horizontally perpendicular to the wire drawing direction.

[0055] like Figure 2 As shown, the wire drawing structure 3 includes a fourth linear driving member 31 and a wire drawing rod 32 driven by the fourth linear driving member 31. The fourth linear driving member 31 is a rodless cylinder, and the wire drawing rod 32 extends horizontally along a direction perpendicular to the wire drawing direction.

[0056] like Figure 1 and Figure 2 The fully automatic online detection device for the linear density of glass fiber yarn shown in the figure further includes a fifth linear drive member 71 arranged obliquely from bottom to top along the wire drawing direction, a support seat 72 provided on the fifth linear drive member 71 and driven by the fifth linear drive member 71, a check rod 73 hinged on the support seat 72, and a torsion spring 74 acting on the check rod 73. The fifth linear drive member 71 is a rodless cylinder, wherein the check rod 73 is hinged on the support seat 72 through a hinge seat, as shown in FIG. Figure 3 As shown, the check rod 73 is in an initial state under the action of the torsion spring 74. The check rod 73 in the initial state is parallel to the thread pulling rod 32. When the thread is pulled, the check rod 73 is located at the lower part of the fifth linear drive member 71 and is at the same height as the thread pulling rod 32. The thread pulling rod 32 can overwhelm and pass over the check rod 73. When the thread pulling rod 32 is pulled into place, the check rod 73 is reset under the action of the torsion spring 74 and limits the yarn to the side of the check rod 73 away from the positioning structure 2. The weighing structure 6 is located at the upper part of the fifth linear drive member 71.

[0057] The weighing structure 6 of this embodiment includes a balance, such as Figure 3As shown, a hook 61 is provided below the balance, extending to the upper portion of the fifth linear drive member 71. When the check rod 73 moves to the upper portion of the fifth linear drive member 71, the check rod 73 is disposed opposite the hook 61. A first drive member 81 for pushing the yarn on the check rod 73 to the hook 61 and a second drive member 82 for pushing the yarn on the hook 61 away from the hook 61 are provided at the hook 61. The first drive member 81 is a universal curved tube or a cylinder, and the second drive member 82 is a universal curved tube or a cylinder. Air blowing from the universal curved tube or pushing from the cylinder moves the yarn from the check rod 73 to the hook 61, and the yarn is then removed from the hook 61 after being weighed.

[0058] In order to facilitate the installation of the torsion spring 74, as shown in FIG. Figure 3 As shown, the side of the check rod 73 away from the positioning structure 2 has a groove, one end of the torsion spring 74 is located in the groove and acts on the check rod 73, and the other end of the torsion spring 74 acts on the support seat 72.

[0059] The working process of this fully automatic online detection device for glass fiber yarn linear density is as follows:

[0060] After the paper tube on the yarn ball conveying line is pulled upward, the yarn winding mechanism between the yarn ball and the paper tube is wound up and the yarn is completely separated from the paper tube. Then, the yarn winding mechanism moves along the conveying direction of the yarn ball conveying line together with the yarn ball. When the yarn moves to the baffle 1 and is positioned by the baffle 1, the yarn ball and the yarn winding mechanism are positioned at the current position.

[0061] The thread pulling rod 32, under the action of the fourth linear drive member 31, hooks the yarn and pulls the yarn toward the fifth linear drive member 71, so that the yarn between the baffle 1 and the positioning structure 2 is folded into a U-shape horizontally. During this process, the yarn in the yarn ball below is continuously pulled out.

[0062] The U-shaped yarn includes an upper portion extending obliquely downward and a lower portion extending obliquely upward, and the upper portion and the lower portion intersect at the thread drawing rod 32;

[0063] When the thread-pulling rod 32 moves into position under the action of the fourth linear drive member 31, the third linear drive member 41 drives the pressing plate 42 to press down, pressing the upper and lower parts of the yarn to the upper surface of the fixed clamping jaw 21, thereby achieving the initial positioning of the U-shaped yarn. At this time, the pressing force on the yarn is relatively small, and the yarn can move under the action of external force;

[0064] Then the second linear drive member 28 is actuated, driving the base 20 and the fixed jaw 21 away from the fifth linear drive member 71. During this process, the yarn between the pressing plate 42 and the thread-pulling rod 32 is straightened, and then the second linear drive member 28 stops actuating.

[0065] The first linear drive member 23 works, driving the mounting seat 25 to approach the fixed jaw 21. During this process, the movable jaw 22 first abuts against the fixed jaw 21, clamping the yarn through the first clamping block 211 and the second clamping block 221. The rotating power member 51 is started. As the first linear drive member 23 continues to move, the cutter disc 52 gradually enters the clearance slot 53 and cuts the yarn tightened in the clearance slot 53.

[0066] After cutting, the first linear drive member 23 drives the rotary power member 51 and the cutter disc 52 to retreat, and then drives the movable clamping jaw 22 to retreat, so that the yarn is loosened from the first clamping block 211 and the second clamping block 221, and the yarn cutting work is completed.

[0067] When the fourth linear drive member 31 drives the screw thread rod 32 to pull the wire, the support seat 72 moves to the lowest point under the action of the fifth linear drive member 71, and then the screw thread rod 32 squeezes and presses down the check rod 73. After the screw thread rod 32 completely passes the check rod 73, the check rod 73 is reset under the action of the torsion spring 74.

[0068] After the cutting is completed, the support seat 72 and the check rod 73 move obliquely upward to the hook 61 under the action of the fifth linear drive member 71, and the yarn is moved to the hook 61 under the action of the first drive member 81. The weight of the yarn is weighed by the weighing structure 6. After weighing is completed, the yarn is dropped from the hook 61 under the action of the second drive member 82.

[0069] Each linear drive component is precisely controlled by the system, and the position of each movement is the same, which ensures that the length of the cut yarn is constant, which is conducive to the accurate calculation of the yarn density.

[0070] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A fully automatic online detection device for glass fiber yarn linear density, located between the yarn ball conveying line and the yarn winding mechanism, characterized in that: The invention comprises a baffle (1) for positioning the yarn, a positioning structure (2) arranged below the baffle (1) for positioning the yarn, a wire drawing structure (3) arranged between the baffle (1) and the positioning structure (2) for moving the yarn, a pressing structure (4) cooperating with the positioning structure (2) to press the yarn, a cutting structure (5) for cutting the yarn, and a weighing structure (6) for weighing. After the wire drawing, the pressing structure (4) cooperates with the positioning structure (2) to press the yarn. After the pressing, the wire drawing structure (3) cooperates with the positioning structure (2) to straighten the yarn. After the straightening, the cutting structure (5) cuts the yarn. The cut yarn is weighed by the weighing structure (6).

2. The fully automatic online detection device for glass fiber yarn linear density according to claim 1, characterized in that: The positioning structure (2) comprises a base (20) and a fixed clamp (21) fixedly connected to the base (20); the upper surface of the fixed clamp (21) is a plane; and the wire drawing path of the wire drawing structure (3) is located directly above the upper surface of the fixed clamp (21).

3. The fully automatic online detection device for glass fiber yarn linear density according to claim 2, characterized in that: The fixed clamping jaw (21) is located at the front and rear ends of the wire drawing structure (3) in the wire drawing direction, and is respectively provided with a first clamping block (211) protruding upward from the upper surface of the fixed clamping jaw (21); a movable clamping jaw (22) and a first linear driving member (23) for driving the movable clamping jaw (22) are slidably provided on the base (20); the movable clamping jaw (22) is located at the front and rear ends in the wire drawing direction, and is respectively provided with a second clamping block (221) for forming a clamping action with the first clamping block (211); when the yarn is straightened, the movable clamping jaw (22) is moved closer to the fixed clamping jaw (21) under the action of the first linear driving member (23) so that the second clamping block (221) and the first clamping block (211) clamp the yarn.

4. The fully automatic online detection device for glass fiber yarn linear density according to claim 3, characterized in that: The upper portion of the fixed clamping jaw (21) close to the movable clamping jaw (22) has a support plate (212) whose upper surface is flush with the upper surface of the fixed clamping jaw (21); the movable clamping jaw (22) is arranged below the support plate (212); the wire drawing path of the wire drawing structure (3) is located directly above the support plate (212); and when clamping the wire, the support plate (212) is located between the two second clamping blocks (221).

5. The fully automatic online detection device for glass fiber yarn linear density according to claim 3, characterized in that: The base (20) is provided with a transverse guide rail (24) extending perpendicular to the wire drawing direction, the transverse guide rail (24) is slidably fitted with a first slider, the first slider is mounted with a mounting seat (25) driven by the first linear drive member (23), the mounting seat (25) is slidably fitted with a connecting rod (26) extending along the length direction of the transverse guide rail (24), the movable clamping jaw (22) is fixed to one end of the connecting rod (26) close to the fixed clamping jaw (21), a spring (27) is sleeved on the connecting rod (26), one end of the spring (27) acts on the movable clamping jaw (22), and the other end acts on the mounting seat (25).

6. The fully automatic online detection device for glass fiber yarn linear density according to claim 5, characterized in that: The first clamping block (211) and the second clamping block (221) are respectively provided with a clearance groove (53). When the first clamping block (211) and the second clamping block (221) are clamped, the two clearance grooves (53) form a clearance space, and the cutting structure (5) cuts / severes the yarn in the clearance space by sawing / shearing.

7. The fully automatic online detection device for glass fiber yarn linear density according to claim 5, characterized in that: The clamping structure (4) comprises a third linear drive member (41) provided on the mounting seat (25) and extending vertically, and a pressing plate (42) driven by the third linear drive member (41), wherein the pressing plate (42) extends horizontally perpendicular to the wire drawing direction.

8. The fully automatic online detection device for glass fiber yarn linear density according to claim 1, characterized in that: The wire drawing structure (3) comprises a fourth linear driving member (31) and a wire drawing rod (32) driven by the fourth linear driving member (31), wherein the wire drawing rod (32) extends horizontally perpendicular to the wire drawing direction.

9. The fully automatic online detection device for glass fiber yarn linear density according to claim 8, characterized in that: The invention also includes a fifth linear driving member (71) arranged to be tilted from bottom to top along the wire drawing direction, a support seat (72) arranged on the fifth linear driving member (71) and driven by the fifth linear driving member (71), a check rod (73) hinged on the support seat (72), and a torsion spring (74) acting on the check rod (73), wherein the check rod (73) is in an initial state under the action of the torsion spring (74), and the check rod (73) in the initial state is in contact with the wire drawing rod (32). ) is parallel to the fifth linear drive member (71). When the thread is being drawn, the check rod (73) is located at the lower part of the fifth linear drive member (71) and is at the same height as the thread-drawing rod (32). The thread-drawing rod (32) can overwhelm and pass over the check rod (73). When the thread-drawing rod (32) is drawn into place, the check rod (73) is reset under the action of the torsion spring (74) and limits the yarn to the side of the check rod (73) away from the positioning structure (2). The weighing structure (6) is located at the upper part of the fifth linear drive member (71).

10. The fully automatic online detection device for glass fiber yarn linear density according to claim 9, characterized in that: The weighing structure (6) includes a balance, a hook (61) is provided below the balance and extends to the upper part of the fifth linear drive member (71), when the check rod (73) moves to the upper part of the fifth linear drive member (71), the check rod (73) is arranged opposite to the hook (61), and the hook (61) is provided with a first drive member (81) for pushing the yarn on the check rod (73) to the hook (61) and a second drive member (82) for pushing the yarn on the hook (61) away from the hook (61).

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