Glass fiber on-line chopping continuous wire leading and loading construction method and device

Abstract

The invention discloses a glass fiber on-line short-cut continuous wire guiding and loading construction method and device. The loading construction method comprises the following steps: starting equipment, manually guiding wires and starting a wire pulling mechanism; the yarn is manually taken out of the slow pulling roller, and the yarn is pulled to pass through the yarn shifting mechanism, the second reversing mechanism, the first godet wheel, the second godet wheel, the third godet wheel, the transition bearing piece and the first reversing wheel to be wound on a yarn pulling wheel in the yarn pulling mechanism; the yarn shifting mechanism acts to guide the yarn into a meshing area of the rubber roller and the knife roller; the rolling yarn pressing mechanism acts to enable the yarn to be attached to the circumferential face of the rubber roller; the yarn is manually shifted to the corresponding position of the bundle splitting plate; the conveying mechanism is used for conveying the chopped yarns into the next working procedure; and the yarn shifting mechanism extends out, the wire drawing wheel of the wire drawing mechanism stops rotating, and the loading action is completed. When working faces of equipment are switched, yarns are manually put into the slow pulling device for switching, and the slow pulling device for switching can pull multiple strands of yarns at the same time. According to the invention, glass fiber online short-cut continuous wire leading and loading are realized.

Description

Technical Field

[0001] The invention belongs to the technical field of glass fiber chopped equipment, and in particular relates to a method and a device for online chopped glass fiber continuous threading and loading. Background Art

[0002] Ultrashort fibers have high breaking strength and low breaking elongation, low shrinkage in boiling water or hot air, high dispersibility in the medium, antistatic properties, low melting point compounding, antibacterial properties, etc. They can be widely used in aviation, transportation, machinery, electronics, medical treatment, automobiles, chemicals, wind power, construction and other fields. The most important quality indicator of ultrashort fiber products is the uniformity of the fiber cutting length. Therefore, as a device for producing ultrashort fibers, the most critical thing is how to accurately cut the fibers to the required length continuously and stably.

[0003] Since the distance between two adjacent blades on the cutter roller is the length of the chopped fibers obtained by cutting, if you want to cut longer glass fibers, you need to increase the distance between the two adjacent blades. In the prior art, there is a high-speed glass fiber chopped machine, including a swinging wire mechanism, which includes a swinging wire cylinder, a swinging wire rod, a swinging wire shaft, a bearing seat and a swinging wire arm. The swinging wire rod is tilted upward, and the swinging wire cylinder drives the swinging wire arm to drive the swinging wire rod to swing downward, pressing the fiber filaments above the rubber roller downward, so that the fiber filaments move toward the meshing area of the cutter roller and the rubber roller, and the fiber filaments are wound into the meshing area of the cutter disc and the rubber roller to complete the cutting.

[0004] However, the glass fiber high-speed short-cut machine in the prior art uses a swing wire mechanism to move the yarn to be cut and roll it into the meshing area of the knife disc and the rubber roller by pressing down to complete the cutting. Sometimes it is difficult to accurately press the yarn down to the meshing cutting area, the accuracy of the yarn pressing position is low, and the success rate of loading is about 95%; and only short-sized short-cut fibers such as 3, 4, and 6 mm can be cut, and large-sized fibers cannot be cut, for example, short-cut fibers exceeding 12 mm cannot be cut. The reason is that if the distance between the blades of two adjacent blades on the knife roller is increased to 12 mm or more, when the previous blade is cutting, the next blade has not yet rotated to the meshing area, and due to the tension at the uncut rear end of the yarn, the meshing area cannot clamp the cutting head end of the yarn, and the cutting head end of the yarn will escape from the meshing area under the action of tension, so yarns larger than 12 mm cannot be cut. Summary of the invention

[0005] In view of the above analysis, the embodiments of the present invention aim to provide a method and device for online short-cut continuous drawing and lathing of glass fibers, so as to solve at least one of the above problems existing in the prior art.

[0006] The object of the present invention is achieved in that:

[0007] On the one hand, a glass fiber online short-cut continuous wire drawing device is provided, which includes a rolling wire pressing mechanism, a first reversing wheel, a wire guiding mechanism and a yarn pulling mechanism;

[0008] Among them, the rolling wire pressing mechanism has a pressing wheel and a downward pressing driving mechanism, the pressing wheel is rotatably arranged at one end of the downward pressing driving mechanism, and is located above the meshing area between the knife roller and the rubber roller for cutting the yarn; the downward pressing driving mechanism is configured to drive the pressing wheel to move toward the circumferential surface of the rubber roller so that the yarn is pressed onto the circumferential surface of the rubber roller; the first reversing wheel is arranged below the meshing area; the yarn to be cut is guided to the top of the rubber roller by the wire guiding mechanism, and the yarn on the wire guiding mechanism is pushed to the circumferential surface of the rubber roller by the yarn pushing mechanism.

[0009] Furthermore, the wire guiding mechanism includes a transition bearing assembly and a plurality of wire guiding wheels; the plurality of wire guiding wheels are dispersedly arranged obliquely above the rubber roller, and the transition bearing assembly is arranged above the meshing area between the knife roller and the rubber roller.

[0010] Furthermore, the transition bearing assembly includes a bearing frame, on which a guide portion is provided, wherein the guide portion has a smooth convex arc surface, and the smooth convex arc surface can guide the yarn to move toward the rubber roller and fall onto the peripheral surface of the rubber roller.

[0011] Further, the guide portion is a cylindrical metal rod, the cylindrical metal rod is mounted on the carrier, and at least a portion of the circumferential surface of the cylindrical metal rod protrudes from the surface of the carrier.

[0012] Furthermore, the number of the cylindrical metal rods is three; the axes of the three cylindrical metal rods are located at three vertices of the same triangle.

[0013] Furthermore, the cylindrical metal rod includes a first copper rod, a second copper rod and a third copper rod, and the first copper rod, the second copper rod and the third copper rod are successively reduced in vertical height; the yarn passes around the first copper rod, the second copper rod, the third copper rod and the first reversing wheel in sequence.

[0014] Furthermore, the other ends of the first copper rod, the second copper rod and the third copper rod are all provided with a tapered surface.

[0015] Furthermore, at least one of the first copper rod, the second copper rod and the third copper rod is provided with a blocking portion at one end, and the blocking portion is away from the circumferential surface of the rubber roller relative to the conical surface.

[0016] Furthermore, the glass fiber online short-cut continuous threading device also includes a second reversing wheel, and the second reversing wheel is configured to reverse the yarn.

[0017] On the other hand, a method for online chopped and continuous drawing of glass fibers is provided, using the above-mentioned online chopped and continuous drawing of glass fibers device;

[0018] The on-board method includes the following steps:

[0019] S1. Start the device, manually draw the yarn, and wait for the yarn to be loaded onto the machine for the first time;

[0020] S2. Load onto the machine for the first time;

[0021] The steps for loading onto the machine for the first time include:

[0022] S21. Start the yarn drawing mechanism;

[0023] S22. Manually take out the yarn from the slow pulling roller, and draw the yarn through the yarn dividing mechanism, the second reversing mechanism, the first wire guide pulley, the second wire guide pulley, the third wire guide pulley, the transition carrier, and the first reversing pulley and wind it onto the yarn drawing wheel inside the yarn drawing mechanism.

[0024] S23. The yarn dividing mechanism operates to make the yarn fall onto the circumferential surface of the rubber roller along the first wire guide pulley, the second wire guide pulley, the third wire guide pulley and the transition carrier assembly, and the yarn is introduced into the meshing area of the rubber roller and the cutter roller;

[0025] S24. The rolling wire pressing mechanism operates, and the pressing wheel moves towards the circumferential surface of the rubber roller so as to press the yarn onto the circumferential surface of the rubber roller until the pressing wheel abuts against the rubber roller, making the yarn adhere to the circumferential surface of the rubber roller;

[0026] S25. Manually move the yarn to the corresponding position on the beam splitting plate;

[0027] S26. The receiving hopper extends, so that the chopped yarn falls into the conveying mechanism below, and the chopped yarn is conveyed into the next process;

[0028] S27. The yarn dividing mechanism extends, and the yarn drawing wheel of the yarn drawing mechanism stops rotating, and the operation of loading onto the machine is completed.

[0029] Furthermore, the online chopped continuous yarn drawing and loading method for glass fiber also includes the step: S3. Load onto the machine for the second time;

[0030] The specific steps of step S3 include:

[0031] S31. Start the yarn drawing mechanism;

[0032] S32. Manually take out the yarn from the slow pulling roller, and draw the yarn through the yarn dividing mechanism, the second reversing mechanism, the first wire guide pulley, the second wire guide pulley, the third wire guide pulley, the transition carrier, and the first reversing pulley and wind it onto the yarn drawing wheel inside the yarn drawing mechanism;

[0033] S33. The yarn dividing mechanism operates to make the yarn fall into the meshing area of the rubber roller and the cutter roller along the conical surface of the outer end face of the pressing wheel;

[0034] S34. Repeat steps S25, S26, and S27 of loading onto the machine for the first time.

[0035] Furthermore, the on-line short-cut continuous wire drawing and loading method for glass fiber also includes the step: S4, switching the working surface of the cutting machine;

[0036] Step S4 specifically includes:

[0037] S41. Stop the equipment, and manually put multiple yarns into the slow-drawing device for switching;

[0038] S42. After the equipment stops, rotate 180° in the horizontal direction to rotate the second working surface to the working position of the first working surface;

[0039] S43. Manually pull out the yarns one by one from the slow-drawing device for switching, and repeat the actions of the first loading and the second loading;

[0040] S44. Replace or maintain the rubber roller and the knife roller on the second working surface to prepare for the next surface switching.

[0041] Furthermore, step S1 includes the following steps:

[0042] The molten glass liquid flows into the spinneret. Manually draw and arrange the multiple yarns formed by the glass liquid flowing down from the spinneret into two strands. After the yarns are stabilized into lines, they are pulled to the oiling roller. The two yarns then pass through the first deflecting wheel and the second deflecting wheel respectively and are put into the slow-drawing roller, waiting for the yarns to be loaded onto the vehicle.

[0043] Furthermore, step S1 also includes the following steps:

[0044] After the equipment starts, the rubber roller swings downward and presses tightly against the knife roller, and the knife roller rotates at the speed set by the program.

[0045] Compared with the prior art, the on-line short-cut continuous wire drawing and loading method and device for glass fiber provided by the present invention can at least achieve one of the following beneficial effects:

[0046] 1. The problem that the existing fiber filament short-cut process cannot achieve short-cut yarns above 12 mm is solved by setting a rolling wire pressing mechanism. The rolling wire pressing mechanism has a pressing wheel and a downward pressing driving mechanism. The downward pressing driving mechanism can drive the pressing wheel to move toward the circumference of the rubber roller to press the yarn onto the circumference of the rubber roller; in this way, during the yarn cutting process, the yarn located above the meshing area between the knife roller and the rubber roller is clamped between the rubber roller and the pressing wheel. The pressing wheel and the rubber roller have a certain clamping force on the yarn. As the yarn is continuously cut, the moving yarn can drive the pressing wheel to rotate. Since the yarn above the meshing area is clamped between the rubber roller and the pressure wheel, there is no tension in the section of yarn below the clamping position of the pressure wheel and the rubber roller, that is, there is no tension in the uncut rear end of the yarn. Therefore, the meshing area between the knife roller and the rubber roller can always clamp the cutting head of the yarn, and the cutting head of the yarn will not fall out of the meshing area. Therefore, the yarn length range that can be cut is wider, especially 12-24mm yarn can be cut to ensure that the cut yarn length meets the requirements. In addition, by setting the transition bearing assembly and multiple guide wheels, the yarn can be accurately pressed down to the meshing cutting area of the rubber roller and the knife roller, the accuracy of the yarn pressing position is higher, and the success rate of loading is as high as 99%.

[0047] 2. In the machine-mounting method, each time you change the working surface or mount the machine for the first time, let the glass fiber be slowly pulled on the slow-pulling roller to ensure the stability of the glass liquid flow, thereby ensuring the stability of the glass fiber drawing and reducing flying wires.

[0048] 3. When the short-cut equipment switches the working surface, the yarn is manually placed in the switching slow-pull device. The switching slow-pull device can pull multiple strands of yarn at the same time, which greatly avoids multiple flying yarns caused by insufficient manpower or operational problems every time the cutting machine changes sides. There is no need to re-lead the yarn, which greatly saves the wire-leading time, reduces the loss of glass liquid, improves efficiency and reduces costs.

[0049] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0051] Figure 1 Structural schematic of the on-line short-cut continuous wire guiding device for glass fiber provided by the present invention Figure 1 ;

[0052] Figure 2 Structural schematic of the on-line short-cut continuous wire guiding device for glass fiber provided by the present invention Figure 2 ;

[0053] Figure 3 Structural schematic of the on-line short-cut continuous wire guiding device for glass fiber provided by the present invention Figure 3 ;

[0054] Figure 4 is Figure 3 an enlarged view of area A in ;

[0055] Figure 5 Structural schematic of the transition bearing assembly provided by the present invention

[0056] Figure 6 Brief schematic diagram of the yarn loading method route of the on-line short-cut continuous wire guiding device for glass fiber for implementing the present invention

[0057] Figure 7 Brief schematic diagram of the cutting state after the yarn is loaded onto the on-line short-cut continuous wire guiding device for glass fiber for implementing the present invention

[0058] Figure 8 First-angle schematic diagram of the glass fiber filament production line equipped with the on-line short-cut continuous wire guiding device for glass fiber provided by the present invention

[0059] Figure 9 Second-angle schematic diagram of the glass fiber filament production line equipped with the on-line short-cut continuous wire guiding device for glass fiber provided by the present invention

[0060] Figure 10 Schematic diagram of the working state (front view) of the on-line short-cut continuous wire guiding device for glass fiber provided by the present invention after manual wire guiding

[0061] Figure 11 Schematic diagram of the working state (top view) of the on-line short-cut continuous wire guiding device for glass fiber provided by the present invention after manual wire guiding

[0062] Figure 12 Schematic diagram of the working state (front view) of the on-line short-cut continuous wire guiding device for glass fiber provided by the present invention when the yarn falls onto the rubber roller

[0063] Figure 13 Schematic diagram of the working state (top view) of the on-line short-cut continuous wire guiding device for glass fiber provided by the present invention when the yarn falls onto the rubber roller

[0064] Figure 14 A schematic diagram (front view) of the working state of the glass fiber online short-cut continuous threading device provided by the present invention when the yarn is pressed under the rolling wire pressing mechanism.

[0065] Reference numerals:

[0066] 1. Knife roller; 2. Rubber roller; 3. Rolling wire pressing mechanism; 31. Pressing wheel; 32. Pressing drive mechanism; 4. First reversing wheel; 5. Wire guide mechanism; 51. First wire guide wheel; 52. Second wire guide wheel; 53. Third wire guide wheel; 54. Transition bearing assembly; 541. First copper rod; 542. Second copper rod; 5421. Blocking part; 543. Third copper rod; 544. Carrying frame; 6. Yarn pulling mechanism; 7. Second reversing wheel; 8. Wire drawing mechanism; 81. Wire drawing wheel; 9. Main frame; 10. Safety locking unit; 11. Glass liquid; 12. Leakage plate; 13. Oiling roller; 14. Reversing wheel one; 15. Reversing wheel two; 16. Slow pulling roller; 17. Slow pulling device for switching; 18. Receiving hopper; 19. Conveying mechanism; 20. Glass fiber yarn; 21. Chopped yarn;

[0067] 100, working surface one; 200, working surface two. DETAILED DESCRIPTION

[0068] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0069] To facilitate the understanding of the embodiments of the present application, the following will be further explained with reference to the accompanying drawings, and the embodiments do not constitute a limitation on the embodiments of the present application. In the accompanying drawings, the sizes and relative sizes of the components may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments can be implemented differently, the specific process sequence may be performed in a different order than described. For example, two continuously described processes may be performed substantially simultaneously or in an order opposite to the described order. In addition, the same reference numerals represent the same components.

[0070] The terms used herein are for the purpose of describing particular embodiments and are not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are also intended to include the plural forms. In addition, when the terms "comprise" and / or "include" and their variants are used in this specification, it is stated that there are the stated features, integers, steps, operations, components, assemblies, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integers, steps, operations, components, assemblies, and / or groups thereof. It should also be noted that, as used herein, the terms "substantially", "about" and other similar terms are used as approximate terms and not as terms of degree, so they are used to explain the inherent deviations of measured, calculated and / or provided values that would be recognized by a person of ordinary skill in the art.

[0071] In the prior art, the method of getting on the vehicle by pressing down the swing rod is adopted, that is, the wire swinging mechanism is used to move the yarn to be cut by pressing down and roll it into the meshing area of the cutter head and the rubber roller to complete the cutting. Due to the existence of the wire swinging mechanism, it is impossible to arrange other mechanisms such as pressure wheels or pressure rollers in terms of structure, so it is impossible to cut short cut fibers with a length of more than 12 mm.

[0072] Based on the above problems, a specific embodiment of the present invention discloses a glass fiber on-line short-cut continuous wire guiding device for getting on the vehicle of continuous wire guiding of glass fiber short-cutting equipment, which can be hereinafter referred to as "continuous wire guiding device for getting on the vehicle" for short.

[0073] In this embodiment, the short-cutting equipment includes a cutter roller 1 and a rubber roller 2. There is a meshing area for cutting the yarn between the cutter roller 1 and the rubber roller 2. The yarn (i.e., glass fiber yarn or fiber filament) is cut in the meshing area; the cutter roller 1 has a cutter head and a cutter roller motor. The cutter roller motor is used to drive the cutter head to rotate. A plurality of blades are evenly distributed along the radial direction on the outer circumference of the cutter head, and the interval between the cutting edges of two adjacent blades is 3-24 mm; optionally, the rubber roller 2 is provided with a rubber roller cylinder, and the rubber roller cylinder is used to drive the rubber roller 2 to approach or move away from the cutter roller 1.

[0074] As Figures 1 to 4 、 Figures 6 to 7 shown, the glass fiber on-line short-cut continuous wire guiding device for getting on the vehicle includes a rolling wire pressing mechanism 3, a first reversing wheel 4, a wire guiding mechanism 5, a yarn dialing mechanism 6, and a wire pulling mechanism 8.

[0075] Among them, the rolling wire pressing mechanism 3 has a pressure wheel 31 and a downward pressing driving mechanism 32. The pressure wheel 31 is rotatably arranged at one end of the downward pressing driving mechanism 32 and is located above the meshing area for cutting the yarn between the cutter roller 1 and the rubber roller 2; the downward pressing driving mechanism 32 is configured to drive the pressure wheel 31 to move towards the circumferential surface of the rubber roller 2 so as to press the yarn onto the circumferential surface of the rubber roller 2.

[0076] Specifically, the downward pressing drive mechanism 32 includes a pressing arm and a driving motor. The pressing wheel 31 is rotatably arranged at one end of the pressing arm through a rotating shaft, and the driving motor is drivingly connected to the other end of the pressing arm. The driving motor drives the pressing arm to swing, so that the pressing wheel 31 moves towards the circumferential surface of the rubber roller 2 until the yarn is pressed against the circumferential surface of the rubber roller 2. It should be noted that the pressure of the pressing wheel 31 pressing against the circumferential surface of the rubber roller 2 can be set as needed, and the specific pressure value can be set according to actual needs. Since when reloading the machine for the second time, that is, when one or more strands of yarn are being cut short, an additional strand of yarn needs to be cut short. In this case, the pressing wheel 31 cannot be disengaged from the rubber roller, otherwise the yarn will fall off. Therefore, a conical surface is provided on the end face of the pressing wheel 31 in this embodiment. The function of this conical surface is that when changing the yarn, the pressing wheel 31 can introduce the yarn into the meshing area between the pressing wheel 31 and the rubber roller 2 without having to be lifted and repeat the downward pressing action.

[0077] During the yarn cutting process, the yarn located above the meshing area between the cutter roller 1 and the rubber roller 2 is clamped between the rubber roller 2 and the pressing wheel 31. The pressing wheel 31 and the rubber roller 2 have a certain clamping force on the yarn. As the yarn is continuously cut, the moving yarn can drive the pressing wheel 31 to rotate. Since the yarn above the meshing area is clamped between the rubber roller 2 and the pressing wheel 31, there is no tension in a section of the yarn below the clamping position of the pressing wheel 31 and the rubber roller 2, that is, there is no tension at the uncut rear end of the yarn. Therefore, the meshing area between the cutter roller 1 and the rubber roller 2 can always clamp the cutting head end of the yarn, and the cutting head end of the yarn will not come out of the meshing area. Therefore, yarns longer than 12 mm can be cut.

[0078] In this embodiment, the wire guiding mechanism 5 has multiple support points, and the multiple support points form a support contour line for the yarn. The circumferential surface of the rubber roller 2 is located inside the support contour line. By providing the transition bearing assembly 54 and multiple guide wheels, the yarn can be accurately pressed down to the meshing cutting area between the rubber roller 2 and the cutter roller 1, and the accuracy of the downward pressing position of the yarn is higher, and the success rate of reloading the machine is as high as 99%.

[0079] In one preferred embodiment, the wire guiding mechanism 5 includes a transition bearing assembly 54 and multiple wire guiding wheels; the multiple wire guiding wheels are dispersedly arranged obliquely above the rubber roller 2, and the transition bearing assembly 54 is arranged above the meshing area between the cutter roller 1 and the rubber roller 2.

[0080] In one alternative embodiment, the wire guiding mechanism 5 includes three wire guiding wheels, specifically the first wire guiding wheel 51, the second wire guiding wheel 52, and the third wire guiding wheel 53. The first wire guiding wheel 51, the second wire guiding wheel 52, and the third wire guiding wheel 53 are rotatably arranged obliquely above the rubber roller 2 and along an arc arrangement trajectory. Here, the oblique above means that when facing the circumferential surface of the rubber roller 2 directly, the three wire guiding wheels and the rubber roller 2 are not in the same vertical plane, and at this time, the positions of the three wire guiding wheels relative to the rubber roller 2 are seen to be obliquely above.

[0081] In one alternative embodiment, as Figure 5 shown, the transition carrier assembly 54 includes a carrier frame 544. A guiding portion is provided on the carrier frame 544. The guiding portion has a smooth convex arc surface, and the smooth convex arc surface can guide the yarn carried thereon to move towards the rubber roller 2 and fall on the circumferential surface of the rubber roller 2. Optionally, the guiding portion is a cylindrical metal rod. The cylindrical metal rod is installed on the carrier frame 544, and at least a part of the circumferential surface of the cylindrical metal rod protrudes from the surface of the carrier frame 544.

[0082] Exemplarily, the number of the cylindrical metal rods is three; the axes of the three cylindrical metal rods are located at the three vertices of the same triangle. The cylindrical metal rods include a first copper rod 541, a second copper rod 542 and a third copper rod 543. The heights of the first copper rod 541, the second copper rod 542 and the third copper rod 543 decrease in sequence in the vertical direction; the yarn bypasses the first copper rod 541, the second copper rod 542, the third copper rod 543 and the first reversing wheel 4 in sequence. The yarn can be in contact with the first copper rod 541, the second copper rod 542, the third copper rod 543 and the first reversing wheel 4 simultaneously, and the yarn between the second copper rod 542, the third copper rod 543 and the first reversing wheel 4 is straight.

[0083] Furthermore, conical surfaces are provided at the other ends of the first copper rod 541, the second copper rod 542 and the third copper rod 543. By providing the conical surfaces, it helps the yarn to slide smoothly onto the circumferential surface of the rubber roller 2.

[0084] Furthermore, at least one of the first copper rod 541, the second copper rod 542 and the third copper rod 543 is provided with a blocking portion 5421 at one end. The blocking portion 5421 is away from the circumferential surface of the rubber roller 2 relative to the conical surface. The blocking portion 5421 is configured to block the yarn from escaping from the side where the blocking portion 5421 is provided, so that the yarn can only slide onto the circumferential surface of the rubber roller 2 from one end of the conical surface. Exemplarily, the diameter of the second copper rod 542 is larger than the diameters of the other two copper rods. The blocking portion 5421 is provided at the end of the second copper rod 542, and the size of the blocking portion 5421, such as the diameter, is larger than the diameter of the second copper rod 542.

[0085] In this embodiment, the yarn dialing mechanism 6, the second reversing wheel 7 and the wire guiding mechanism 5 are arranged in sequence along the yarn moving direction; the second reversing wheel 7 is configured to reverse the direction of the yarn; the yarn dialing mechanism 6 is configured to dial the yarn on the wire guiding mechanism 5 onto the circumferential surface of the rubber roller 2.

[0086] In this embodiment, the wire drawing mechanism 8 includes a traction motor and a wire drawing wheel 81. The traction motor is used to drive the wire drawing wheel 81 to rotate at a set speed. The first reversing wheel 4 is arranged below the meshing area of the cutter roller 1 and the rubber roller 2, and is configured such that when the yarn is fed onto the machine, the yarn bypasses the first reversing wheel 4 and then is connected to the wire drawing mechanism 8. The wire drawing mechanism 8 is used to draw the fiber filaments into the diameter required by the process. After the yarn passes through the first reversing wheel 4, it is wound around the wire drawing wheel 81 of the wire drawing mechanism 8, and the yarn between the wire drawing wheel 81 of the wire drawing mechanism 8 and the first reversing wheel 4 is in a horizontal or substantially horizontal state.

[0087] In this embodiment, the short-cutting device further includes a main body frame 9 and a safety locking unit 10. The yarn guiding mechanism 6, the cutter roller 1, the rubber roller 2, the rolling wire pressing mechanism 3, the second reversing wheel 7, and the wire drawing mechanism 8 are all arranged on the main body frame 9. The wire guiding mechanism 5 and the first reversing wheel 4 are arranged on the safety locking unit 10. The safety locking unit 10 is connected to the main body frame 9, and the safety locking unit 10 can at least surround the cutter disc, thereby preventing the cutter disc from causing harm to the operator when cutting the fiber filaments. Optionally, the safety locking unit 10 is made of stainless steel material and includes an upper frame and a lower frame. Both the upper frame and the lower frame are rotatably connected to the main body frame 9 through hinges.

[0088] The glass fiber production line equipped with the on-line short-cutting and continuous wire feeding and on-machine device provided in this embodiment further includes a wire production and wire feeding device. Refer to Figures 8 to 9 , a wire production and wire feeding device is also provided in the side area of the short-cutting device equipped with the continuous wire feeding and on-machine device. The wire production and wire feeding device is used to prepare the glass fiber yarn 20 (which can be simply referred to as "yarn") and guide the prepared glass fiber yarn 20 to the short-cutting device for short-cutting. Specifically, the wire production and wire feeding device includes a spinneret 12, an oiling roller 13, a redirecting wheel assembly, and a slow drawing roller 16 arranged in sequence from top to bottom. The spinneret 12, the oiling roller 13, the redirecting wheel assembly, and the slow drawing roller 16 are arranged in groups, and multiple groups are arranged at the production site. Figures 8 to 9 Only 3 groups are shown in , and the other groups are not shown. Among them, the wire production and wire feeding device further includes a material pool, and multiple spinnerets can be arranged at the bottom of the material pool. The spinneret 12 is evenly provided with a plurality of nozzles. The glass liquid 11 forms multiple glass fiber yarns 20 through the plurality of nozzles on the spinneret 12. The formed glass fiber yarns 20 pass through the oiling roller 13, and the oiling roller 13 can coat the surface of the yarn with a liquid agent to further strengthen or protect the yarn. The redirecting wheel assembly includes a first redirecting wheel 14 and a second redirecting wheel 15. The yarn passing through the oiling roller 13 is redirected by the first redirecting wheel 14 and the second redirecting wheel 15, and the redirected yarn is placed into the slow drawing roller 16.

[0089] In one alternative embodiment, the chopping device is a double-head online chopping machine, that is to say, the chopping device includes two sets of chopping mechanisms. Each set of chopping mechanisms has a knife roller 1, a rubber roller 2, a rolling wire pressing mechanism 3, a first reversing wheel 4, a wire guiding mechanism 5, a yarn dialing mechanism 6, a second reversing wheel 7, a wire drawing mechanism 8 and related supporting components; the two sets of chopping mechanisms are arranged on both sides of the chopping device, symmetrically arranged at 180°, and can rotate along the vertical center line of the chopping device. Therefore, the double-head online chopping device has two rotatable and switchable working surfaces, called working surface one 100 and working surface two 200. When working surface one 100 is working normally, operations such as replacing the rubber roller 2, the knife roller 1 and daily maintenance can be carried out on working surface two 200, so as to ensure the continuity of production work.

[0090] In the technical solution adopting two sets of chopping mechanisms, the wire drawing device for producing wire is also provided with a slow pulling device 17 for switching. When the chopping device switches the working surface, the operator puts the yarn into the slow pulling device 17 for switching. The slow pulling device 17 for switching can traction multiple strands of yarn at the same time, greatly avoiding the flying of multiple spinnerets caused by insufficient manpower or operation problems during each cutting machine surface change, and eliminating the need for the step of re-drawing the wire, thus greatly saving the wire drawing time and reducing the loss of glass liquid.

[0091] It should be noted that the related structures of the yarn dialing mechanism 6, the second reversing wheel 7, the wire drawing mechanism 8, the guide wheel, the safety locking unit 10, the main frame 9, the spinneret 12, the oiling roller 13, the redirecting wheel assembly and the slow pulling roller 16 can be realized by using the existing technology, and will not be elaborated here.

[0092] This embodiment also provides a method for continuously guiding and loading chopped glass fiber online, using the aforementioned device for continuously guiding and loading chopped glass fiber online. The route of the method for guiding and loading chopped glass fiber online is as Figures 6 to 7 shown.

[0093] The method for continuously guiding and loading chopped glass fiber online includes steps S1 - S4, specifically as follows:

[0094] S1. Start the equipment, manually draw the wire, and wait for the yarn to be loaded onto the machine for the first time.

[0095] Use the wire drawing device for producing wire to prepare the glass fiber yarn 20 to be cut, manually draw the wire, and manually guide the prepared glass fiber yarn 20 to the slow pulling roller, and wait for the yarn to be loaded onto the machine for the first time. Specifically, see Figure 8, the molten glass liquid 11 flows into the bushing 12. Manually, about 4000 - 6000 yarns formed by the glass liquid 11 flowing down from the bushing 12 are drawn and sorted into two strands. After the yarns are stabilized into threads, they are drawn onto the oiling roller 13. The two strands of yarns then pass through the first yarn deflecting wheel 14 and the second yarn deflecting wheel 15 respectively and are placed into the slow drawing roller 16, waiting to be mounted on the machine. Among them, because on-line short cutting requires extremely high operating stability, the slow drawing roller 16 draws the yarns with a slow and stable traction force, improving the stability of the glass liquid flow, making the yarns move at a uniform speed, thus ensuring the stable drawing of the yarns without flying filaments, and also ensuring the stability of the glass liquid flow rate in the channel; at the same time, it can also avoid mounting on the machine while drawing, saving time for subsequent drawing and mounting, and playing a role in efficient and stable production.

[0096] After the equipment is started, the rubber roller 2 swings down and presses tightly against the cutter roller 1, and the cutter roller 1 rotates at the speed set by the program. Since the rubber roller 2 presses tightly against the cutter roller 1, the rotating cutter roller 1 can drive the rubber roller 2 to rotate, and the rubber roller 2 and the cutter roller 1 rotate at the same linear speed. At this time, the yarn deflecting cylinder of the yarn deflecting mechanism 6 is in the extended state, the rolling wire pressing mechanism 3 is in the state of being away from the rubber roller 2, and the receiving hopper 18 is in the state of retracting for receiving materials.

[0097] S2. First mounting on the machine:

[0098] S21. Start the wire drawing mechanism 8, and the wire drawing wheel 81 rotates at the first speed. Specifically, manually press the traction start button next to the bushing 12, and the wire drawing wheel 81 of the wire drawing mechanism 8 starts to rotate. The first speed is a relatively low speed, that is, the wire drawing wheel 81 rotates at a low speed.

[0099] S22. Manually take out the yarns from the slow drawing roller 16, draw the yarns through the yarn deflecting mechanism 6, the second reversing mechanism 7, the first wire guiding wheel 51, the second wire guiding wheel 52, the third wire guiding wheel 53, the transition carrier 54, the first reversing wheel 4 and wind them onto the wire drawing wheel 81 inside the wire drawing mechanism 8. See Figures 10 to 11 . Subsequently, the traction motor speeds up, and the speed of the wire drawing wheel 81 increases. When the speed of the wire drawing wheel 81 increases to the set speed value, the fiber filaments are drawn to the diameter required by the process; the set speed value is the second speed, the first speed is less than the second speed, and the values of the first speed and the second speed can be set according to actual production needs.

[0100] S23, the yarn shifting mechanism 6 is activated, so that the yarn falls onto the circumferential surface of the rubber roller 2 along the first wire guide wheel 51, the second wire guide wheel 52, the third wire guide wheel 53 and the transition bearing assembly 54, and the yarn is introduced into the meshing area between the rubber roller 2 and the knife roller 1. Specifically, the on-board button is manually pressed, the yarn shifting cylinder of the yarn shifting mechanism 6 is retracted, and the yarn shifting mechanism 6 shifts the yarn inward along the axial direction of the three wire guide wheels, so that the yarn falls onto the circumferential surface of the rubber roller 2, that is, the yarn slides onto the circumferential surface of the rubber roller 2 along the first wire guide wheel 51, the second wire guide wheel 52, the third wire guide wheel 53 and the three copper rods; the yarn is introduced into the meshing area between the rubber roller 2 and the knife roller 1 through the friction between the yarn and the rubber roller 2, see Figures 12 to 13 .

[0101] S24, the rolling wire pressing mechanism 3 is actuated, and the pressure wheel 31 moves toward the circumferential surface of the rubber roller 2 to press the yarn against the circumferential surface of the rubber roller 2, until the pressure wheel 31 is close to the rubber roller 2, so that the yarn fits the circumferential surface of the rubber roller 2. Specifically, after the yarn shifting mechanism 6 completes the yarn shifting action, the downward pressure driving mechanism 32 of the rolling wire pressing mechanism 3 starts to work, driving the pressure wheel 31 to move toward the circumferential surface of the rubber roller 2, so that the yarn is pressed against the circumferential surface of the rubber roller 2, until the pressure wheel 31 is close to the rubber roller 2, ensuring that the yarn fits the surface of the rubber roller 2, ensuring sufficient traction, and preventing the yarn from falling off. During the yarn cutting process, the yarn above the meshing area is always clamped between the rubber roller 2 and the pressure wheel 31, see Figure 14 .

[0102] S25, manually moving the yarn to the corresponding position of the beam splitting plate.

[0103] S26, the receiving hopper 18 extends to allow the chopped yarns 21 to fall into the conveying mechanism 19 below, and the chopped yarns 21 are conveyed to the next process.

[0104] S27, the yarn pulling mechanism 6 extends, the thread drawing wheel 81 of the thread drawing mechanism 8 stops rotating, and the vehicle mounting action is completed.

[0105] S3, Second Boarding:

[0106] Secondary loading means that one or more strands of yarn are being chopped on the chopped yarn equipment. At this time, the yarn is pulled onto the rubber roller 2 without stopping the chopped yarn equipment to realize the loading action. It usually refers to the loading of subsequent yarns after the first loading is completed, or one or more strands of yarn fall off during the normal yarn cutting process and need to be loaded again.

[0107] The difference between the second loading and the first loading is that the second loading process does not include step S24, that is, during the second loading process, the pressing wheel 31 of the rolling wire pressing mechanism 3 does not need to repeat the pressing action, and the yarn can be guided into the meshing area between the pressing wheel 31 and the rubber roller 2 by the conical surface of the end face of the pressing wheel 31, so as to ensure the continuity of yarn cutting.

[0108] Specifically, the steps for the second car to board are as follows:

[0109] S31. Start the wire drawing mechanism 8, and the wire drawing wheel 81 rotates at the first speed. Specifically, manually press the traction start button next to the spinneret 12, and the wire drawing wheel 81 of the wire drawing mechanism 8 starts to rotate slowly.

[0110] S32. Manually take out the yarn from the slow drawing roller 16, and draw the yarn through the yarn feeding mechanism 6, the second reversing mechanism 7, the first wire guide wheel 51, the second wire guide wheel 52, the third wire guide wheel 53, the transition carrier 54, and the first reversing wheel 4 and wind it onto the wire drawing wheel 81 inside the wire drawing mechanism 8. Subsequently, the traction motor speeds up, and when the speed of the wire drawing wheel 81 gradually increases to the set speed value, the fiber filament is drawn to the required diameter of the process.

[0111] S33. The yarn feeding mechanism 6 operates to make the yarn fall into the meshing area of the rubber roller 2 and the cutter roller 1 along the conical surface of the outer end face of the pressure wheel 31. Specifically, manually press the boarding button, the yarn feeding cylinder of the yarn feeding mechanism 6 retracts, driving the yarn to move axially inward along the axis of the three wire guide wheels, so that the yarn falls onto the circumferential surface of the rubber roller 2, and the yarn falls into the meshing area of the rubber roller 2 and the cutter roller 1 along the conical surface of the outer end face of the pressure wheel 31. See Figures 12 to 13 .

[0112] S34. Repeat the operations S25, S26, and S27 of the first boarding, without step S24.

[0113] S4. Switch the working surface of the machine:

[0114] S41. The equipment stops, and manually put multiple strands of yarn into the slow drawing device 17 for switching: When the rubber roller 2 or the cutter roller 1 on the first working surface 100 reaches the service life, press the equipment stop button, the receiving hopper 18 retracts to receive the material, and the cutter roller 1 and the rubber roller 2 slow down. When the speed drops to a certain value, manually draw the yarn instead of mechanical traction. Manually put the yarn into the slow drawing device 17 for switching. The slow drawing device 17 for switching can draw multiple strands of yarn at the same time, greatly avoiding the flying of filaments from multiple spinnerets caused by insufficient manpower or operation problems during each machine cutting and surface switching, eliminating the need for the step of manually guiding the wire again, greatly saving the wire guiding time and reducing the loss of glass liquid.

[0115] S42. Change the working surface of the equipment: After the equipment stops, rotate 180° in the horizontal direction to rotate the second working surface 200 to the original working position.

[0116] S43. Guide the wire onto the car: Manually pull out one strand by one strand from the slow drawing device 17 for switching, and repeat the operations of the first boarding and the second boarding.

[0117] S44, Replace rubber roller 2 and knife roller 1: Replace and maintain rubber roller 2 and knife roller 1 on working surface 200 to prepare for the next surface replacement.

[0118] Compared with the prior art, the glass fiber online short-cut continuous wire drawing and machine process and device provided in this embodiment can achieve at least one of the following beneficial effects:

[0119] 1. The problem that the existing glass fiber chopped yarn process cannot produce chopped yarns above 12 mm is solved by setting a rolling wire pressing mechanism. The rolling wire pressing mechanism has a pressing wheel and a downward pressing driving mechanism. The downward pressing driving mechanism can drive the pressing wheel to move toward the circumference of the rubber roller to press the yarn onto the circumference of the rubber roller. In this way, during the yarn cutting process, the yarn located above the meshing area between the knife roller and the rubber roller is clamped between the rubber roller and the pressing wheel. The pressing wheel and the rubber roller have a certain clamping force on the yarn. As the yarn is continuously cut, the moving yarn can drive the pressing wheel to rotate. Since the yarn above the meshing area is clamped between the rubber roller and the pressure wheel, there is no tension in the section of yarn below the clamping position of the pressure wheel and the rubber roller, that is, there is no tension in the uncut rear end of the yarn. Therefore, the meshing area between the knife roller and the rubber roller can always clamp the cutting head of the yarn, and the cutting head of the yarn will not fall out of the meshing area. Therefore, the yarn length range that can be cut is wider, especially 12-24mm yarn can be cut to ensure that the cut yarn length meets the requirements. In addition, by setting the transition bearing assembly and multiple guide wheels, the yarn can be accurately pressed down to the meshing cutting area of the rubber roller and the knife roller, the accuracy of the yarn pressing position is higher, and the success rate of loading is as high as 99%.

[0120] 2. In the machine-mounting method, each time you change the working surface or mount the machine for the first time, let the glass fiber be slowly pulled on the slow-pulling roller to ensure the stability of the glass liquid flow, thereby ensuring the stability of the glass fiber drawing and reducing flying wires.

[0121] 3. When the short-cut equipment switches the working surface, the yarn is manually placed in the switching slow-pull device. The switching slow-pull device can pull multiple strands of yarn at the same time, which greatly avoids multiple flying yarns caused by insufficient manpower or operational problems every time the cutting machine changes sides. There is no need to re-lead the yarn, which greatly saves the wire-leading time and reduces the loss of glass liquid.

[0122] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above description is only the specific implementation method of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An on-line short-cut continuous wire drawing and loading device for glass fiber, characterized in that, It includes a rolling wire pressing mechanism (3), a first reversing wheel (4), a wire guiding mechanism (5) and a yarn dialing mechanism (6); Among them, the rolling wire pressing mechanism (3) has a pressing wheel (31) and a downward pressing driving mechanism (32). The pressing wheel (31) is rotatably arranged at one end of the downward pressing driving mechanism (32) and is located above the meshing area between the cutter roller (1) and the rubber roller (2) for cutting the yarn. The downward pressing driving mechanism (32) is configured to drive the pressing wheel (31) to move towards the circumferential surface of the rubber roller (2) so as to press the yarn onto the circumferential surface of the rubber roller (2). The first reversing wheel (4) is arranged below the meshing area. The yarn to be cut is guided above the rubber roller (2) through the wire guiding mechanism (5), and the yarn on the wire guiding mechanism (5) is dialed onto the circumferential surface of the rubber roller (2) through the yarn dialing mechanism (6).

2. The glass fiber on-line short-cut continuous wire drawing and loading device according to claim 1, characterized in that, The wire guiding mechanism (5) includes a transition bearing assembly (54) and a plurality of wire guiding wheels. The plurality of wire guiding wheels are dispersedly arranged obliquely above the rubber roller (2), and the transition bearing assembly (54) is arranged above the meshing area between the cutter roller (1) and the rubber roller (2).

3. The on-line chopped continuous fiber drawing and loading device for glass fiber according to claim 2, characterized in that The transition bearing assembly (54) includes a bearing frame (544). A guiding portion is provided on the bearing frame (544). The guiding portion has a smooth convex arc surface, and the smooth convex arc surface can guide the yarn to move towards the rubber roller (2) and fall on the circumferential surface of the rubber roller (2).

4. The on-line chopped continuous fiber drawing and loading device for glass fibers according to claim 3, characterized in that, The guiding portion is a cylindrical metal rod. The cylindrical metal rod is installed on the bearing frame (544), and at least a part of the circumferential surface of the cylindrical metal rod protrudes from the surface of the bearing frame (544); Preferably, the number of the cylindrical metal rods is three. The axes of the three cylindrical metal rods are located at the three vertices of the same triangle; Preferably, the cylindrical metal rods include a first copper rod (541), a second copper rod (542) and a third copper rod (543). The heights of the first copper rod (541), the second copper rod (542) and the third copper rod (543) in the vertical direction decrease in sequence. The yarn bypasses the first copper rod (541), the second copper rod (542), the third copper rod (543) and the first reversing wheel (4) in sequence; Preferably, the other ends of the first copper rod (541), the second copper rod (542) and the third copper rod (543) are all provided with conical surfaces; Preferably, at least one of the first copper rod (541), the second copper rod (542) and the third copper rod (543) is provided with a blocking portion (5421) at one end. The blocking portion (5421) is away from the circumferential surface of the rubber roller (2) relative to the conical surface.

5. The on-line short-cut continuous wire drawing and loading device for glass fibers according to claim 1, characterized in that, It further includes a second reversing wheel (7), and the second reversing wheel (7) is configured for reversing the yarn.

6. A method for continuously feeding short-cut glass fibers onto a vehicle during production, characterized in that, Use the glass fiber on-line short cut continuous wire guiding device for getting on the vehicle according to any one of claims 2 to 5; The getting-on-the-vehicle working method includes the following steps: S1. Start the equipment, manually guide the wire, and wait for the yarn to get on the vehicle for the first time; S2. Get on the vehicle for the first time; The steps of getting on the vehicle for the first time include: S21. Start the wire pulling mechanism (8); S22. Manually take out the yarn from the slow pulling roller (16), and draw the yarn through the yarn dividing mechanism (6), the second reversing mechanism, the first wire guide wheel (51), the second wire guide wheel (52), the third wire guide wheel (53), the transition carrier, and the first reversing wheel (4) and wind it onto the wire drawing wheel (81) inside the wire drawing mechanism (8); S23. The yarn dividing mechanism (6) operates to make the yarn fall onto the circumferential surface of the rubber roller (2) along the first wire guide wheel (51), the second wire guide wheel (52), the third wire guide wheel (53) and the transition carrier assembly (54), and the yarn is introduced into the meshing area of the rubber roller (2) and the cutter roller (1); S24. The rolling wire pressing mechanism (3) operates, and the pressing wheel (31) moves towards the circumferential surface of the rubber roller (2) so as to press the yarn onto the circumferential surface of the rubber roller (2) until the pressing wheel (31) abuts against the rubber roller (2), making the yarn adhere to the circumferential surface of the rubber roller (2); S25. Manually move the yarn to the corresponding position of the beam splitter; S26. The receiving hopper (18) extends out to make the short cut yarn (21) fall into the conveying mechanism (19) below, and convey the short cut yarn (21) into the next process; S27. The yarn dividing mechanism (6) extends out, and the wire drawing wheel (81) of the wire drawing mechanism (8) stops rotating, and the on-vehicle operation is completed.

7. The online short-cut continuous wire drawing and loading method for glass fiber according to claim 6, characterized in that, It further includes the step: S3. Second on-vehicle; Step S3 specifically includes: S31. Start the wire drawing mechanism (8); S32. Manually take out the yarn from the slow pulling roller (16), and draw the yarn through the yarn dividing mechanism (6), the second reversing mechanism, the first wire guide wheel (51), the second wire guide wheel (52), the third wire guide wheel (53), the transition carrier, and the first reversing wheel (4) and wind it onto the wire drawing wheel (81) inside the wire drawing mechanism (8); S33. The yarn dividing mechanism (6) operates to make the yarn fall into the meshing area of the rubber roller (2) and the cutter roller (1) along the conical surface of the outer end face of the pressing wheel (31); S34. Repeat steps S25, S26, and S27 of the first on-vehicle.

8. The on-line short-cut continuous drawing and loading method of glass fiber according to claim 7, characterized in that, It further includes the step: S4. Switch the working surface of the machine; Step S4 specifically includes: S41. Stop the equipment, and manually put multiple strands of yarn into the slow pulling device for switching (17); S42. After the equipment stops, rotate 180° in the horizontal direction to rotate the working surface two (200) to the working position of the working surface one (100); S43. Manually pull out the yarn strand by strand from the slow pulling device for switching (17), and repeat the actions of the first on-vehicle and the second on-vehicle; S44. Replace or maintain the rubber roller (2) and the cutter roller (1) on the working surface two (200) to prepare for the next surface switching.

9. The glass fiber on-line short-cut continuous wire drawing and loading method according to claim 7, characterized in that, Step S1 includes the following steps: The molten glass liquid (11) flows into the spinneret (12). Manually draw and arrange the multiple yarns formed by the glass liquid (11) flowing down from the spinneret (12) into two strands. After the yarns are stabilized into lines, draw them onto the oiling roller (13). The two strands of yarn then pass through the first redirecting wheel (14) and the second redirecting wheel (15) respectively and are placed into the slow pulling roller (16) to wait for the yarn to get on the vehicle.

10. The glass fiber on-line short-cut continuous wire drawing and loading method according to claim 9, characterized in that, Step S1 further includes the following steps: After the equipment starts, the rubber roller (2) swings downward and presses against the cutter roller (1), and the cutter roller (1) rotates at the speed set by the program.

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