Thread breaking mechanism, thread breaking device, sewing machine, automatic printing apparatus, and thread breaking method

Abstract

The application provides a thread breaking mechanism, a thread breaking device, a sewing machine and an automatic printing equipment, wherein the thread breaking mechanism comprises a thread breaking arm, the thread breaking arm comprises a cutter and a contact piece, the cutter is used for thread breaking, the contact piece comprises a contact head, the cutter comprises a cutter edge used for thread breaking, and the cutter edge has a spacing with the contact head. The thread breaking mechanism provided by the application improves the thread breaking efficiency. The thread breaking device in the application solves the problem of automatic cutting of threads between materials, and manual thread breaking is no longer needed. The thread breaking device in the application comprises a plurality of pressing balls, the pressing balls enable the materials to be evenly conveyed to a thread breaking position, and enable the device to stably realize thread breaking operation.

Description

Technical Field

[0001] This invention relates to the field of thread binding, and more particularly to a sewing machine, a thread-breaking device, a sewing machine, an automatic printing equipment, and a thread-breaking method. Background Technology

[0002] In current document production, the cover and multiple inner pages of the document are sewn together by a sewing machine. This binding method has advantages such as sturdiness and durability. After sewing and binding, it is necessary to cut the thread connecting the two products. In existing production activities involving sewing machines, a large number of sewing machines do not have an automatic thread-cutting function.

[0003] Therefore, manually cutting the thread connecting two products is a common practice in factories. However, manual thread cutting is labor-intensive, inefficient, and lacks automation; furthermore, the location of the break and the condition of the thread end are influenced by the operator's experience. Therefore, a device is needed to cut the thread connecting two products during the sewing machine production process, transforming the original manual process into mechanized and automated production. Summary of the Invention

[0004] Therefore, to address the problem of low efficiency in manual wire breaking in existing technologies, a mechanism or device capable of rapid wire breaking is provided to improve production efficiency.

[0005] To address the aforementioned problems, the present invention provides a wire breaking mechanism, which includes a wire breaking arm, a blade, and a contact member. The contact member is disposed at the end of the wire breaking arm. The blade is used to break the wire, and the contact member includes a contact head. The blade includes a cutting edge for breaking the wire, and there is a gap between the cutting edge and the contact head.

[0006] In some embodiments, the spacing can be used to prevent materials and lines from being cut by creating space; the spacing can also be a space to accommodate components that cover the blade, for example, by covering the blade with a flexible component to prevent the blade from cutting the material or line. The spacing is greater than or equal to the layer thickness of the component that can cover the blade.

[0007] In some embodiments, the material in a flat state has four edges, namely a first end, a second end, a third end, and a fourth end, and the surface of the material is the surface of the material surrounded by the first end, the second end, the third end, and the fourth end. The distance between the blade and the contact is greater than or equal to a minimum distance, which is the shortest distance between the blade and the contact when the contact contacts the surface of the material, satisfying the condition that the blade does not cut the line and the material.

[0008] In some embodiments, there is a height difference between the portion of the material pressed by the contact and the portion of the material not pressed by the contact, the height difference being a first distance, and the shortest distance being greater than the first distance.

[0009] In some implementations, the spacing can be selected as 0.5cm, 0.8cm, 1cm, 1.2cm, 1.5cm, 2cm, or 3cm.

[0010] The materials may be certificates, books, or other thread-bound products.

[0011] In some embodiments, the contact and the blade are elastically mounted on the wire-breaking arm, which is provided with a blade receiving portion. When the contact contacts the surface of the material, the contact is subjected to pressure that causes the blade to retract into the blade receiving portion of the wire-breaking arm. When the contact detaches from the surface of the material, the blade extends out from the receiving portion of the wire-breaking arm. And / or, the wire-breaking arm includes a body, on which the contact and the blade are disposed, and the body is made of a flexible material.

[0012] In some embodiments, the wire break arm is deformable. The wire break arm includes a body, on which the contact and the blade are disposed, and the body is made of a flexible material. When the contact comes into contact with the surface of the material, the wire break arm bends and deforms; when the contact detaches from the surface of the material and enters the gap between the two materials, the wire break arm recovers from its deformation.

[0013] In some embodiments, the material can be conveyed horizontally, and when the material is conveyed along a horizontal plane, the surface pressed by the contact is either the upper or lower surface of the material. In some embodiments, the material can be conveyed vertically.

[0014] In some embodiments, the wire-cutting arm is mounted on a rotating mounting component, or it can be mounted on a reciprocating drive device. The arrangement between the contact and the blade of the wire-cutting arm prevents accidental cutting of the wire, thus improving wire-cutting efficiency. Compared to existing manual wire-cutting mechanisms, the wire-cutting mechanism of this invention can rapidly improve wire-cutting efficiency.

[0015] In some embodiments, the blade has an inclined blade edge, and the angle between the inclined blade edge and the contact member is 15-165°; and / or, the contact member is disposed on one side of the end of the wire break arm, and the blade is disposed on the other side of the end of the wire break arm.

[0016] In some embodiments, the wire-breaking arm includes a body, and the contact and / or the blade are integrally formed with the body; and / or, the contact of the contact includes an arcuate structure.

[0017] In some embodiments, the contact includes one, two, or more contacts; and / or, the width of the contact does not exceed 1 / 4 of the width of the wire break arm.

[0018] In some embodiments, the blade has an angled edge, a flat edge, or an edge that includes one or more V-shapes.

[0019] In some embodiments, a rotary mounting component is also included, on which the wire break arm is mounted. The rotary mounting component is a cylinder, triangular prism, cube, cuboid, regular pentagon, or regular hexagon.

[0020] In some embodiments, the rotating mounting component is a cylinder, and there are three wire-breaking arms mounted on the rotating mounting component, with the three wire-breaking arms installed at 120° intervals.

[0021] In some embodiments, one end of the wire break arm is mounted to a swivel mount, and the wire break arm extends along the tangential direction of the swivel mount. In some embodiments, the swivel mount is cylindrical, and the wire break arm is mounted along the radial extension direction of the swivel mount.

[0022] In some embodiments, the system further includes a shaft and an adjusting mechanism. A rotary mounting component is disposed on the shaft, and a bearing is provided between the rotary mounting component and the shaft. The adjusting mechanism adjusts the position of the shaft vertically, and the shaft is mounted to the adjusting mechanism via the bearing. The adjusting mechanism may include a threaded screw, a rack and pinion, or other structures that facilitate the adjustment of the shaft's position.

[0023] In some embodiments, the adjusting mechanism includes a bearing housing and an adjusting plate, wherein the bearing housing is fixed on the adjusting plate, or the bearing housing and the adjusting plate are elastically connected by a spring structure or by an elastically deformable material.

[0024] The present invention also includes a wire breaking device, comprising the above-mentioned wire breaking mechanism, the wire breaking device further comprising a conveying device and a protective device, the conveying device being used for conveying materials, and the protective device comprising a protective cover being used to protect the wire breaking arm.

[0025] In some embodiments, the protective device further includes a cover plate, the conveying device includes a conveyor belt, a power unit, and a conveying auxiliary mechanism, the conveyor belt is connected to the power unit, the power unit includes a motor that provides power for the movement of the conveyor belt, the conveying auxiliary mechanism includes a plurality of pressure balls disposed on the cover plate, the cover plate is disposed on the upper side of the conveyor belt, the cover plate has holes for limiting the pressure balls, and the pressure balls are pressed onto the material by the pressure of the pressure plate and / or gravity.

[0026] In some embodiments, the protective cover and / or the cover plate is made of transparent acrylic material; and / or, the protective cover is magnetically connected to the cover plate.

[0027] In some embodiments, the cover plate is provided with a positioning groove to facilitate the positioning of the protective cover.

[0028] In some embodiments, the pressure ball is pressed onto the material by gravity.

[0029] In some embodiments, the wire breaking device includes a guide portion comprising a straight section and an inlet section, the inlet section comprising an arc-shaped guide rail.

[0030] In some embodiments, the straight segment of the guide includes an upper edge, which is an edge connected to the vertical portion of the straight segment. The upper edge can prevent the end of the material from curling or turning upward, so that the material moves forward in a predetermined direction; and / or, the tail of the inlet segment includes a guide edge, which is arc-shaped or inclined, for smoothly introducing the material into the straight segment.

[0031] In some embodiments, the wire breaking device further includes a support portion for supporting the conveyor belt of the material and conveying device. The support portion is provided with a first cutting groove, and when the wire breaking arm moves to the support portion, a portion of the wire breaking arm is accommodated by the first cutting groove.

[0032] The present invention also provides a sewing machine, including the above-described thread-breaking mechanism or the above-described thread-breaking device.

[0033] The present invention also provides an automatic printing device, including the above-described thread-breaking mechanism, or the above-described thread-breaking device, or the above-described sewing machine.

[0034] The present invention also provides a thread-breaking method, wherein the thread-breaking method uses the above-described thread-breaking device, the above-described sewing machine, or the above-described automatic printing equipment, and the thread-breaking method includes the following steps:

[0035] Step 1: When the first material is conveyed to the inlet of the wire breaking device, the conveying device of the wire breaking device starts to convey the first material. The conveying device transports the first material to the wire breaking mechanism. The wire breaking mechanism includes a rotating mounting component. The rotating mounting component is provided with at least three wire breaking arms. The at least three wire breaking arms include a first wire breaking arm, a second wire breaking arm, and a third wire breaking arm. The first material pushes the first wire breaking arm to drive the rotating mounting component of the wire breaking mechanism to rotate.

[0036] Step 2: The second wire-cutting arm enters the space between the first material and the second material. The second wire-cutting arm continues to move, and the contact part at the end of the second wire-cutting arm contacts the first end of the second material, causing the rotating mounting part to rotate further. During the rotation, the wire between the first material and the second material contacts the blade on the second wire-cutting arm, and the wire is cut.

[0037] The present invention also provides a thread-breaking method, wherein the thread-breaking method uses the above-described thread-breaking device, the above-described sewing machine, or the above-described automatic printing equipment, the thread-breaking mechanism includes a first thread-breaking arm, a second thread-breaking arm, and a third thread-breaking arm, and the thread-breaking method includes the following steps:

[0038] Step 1: The conveying device transports the first material to the wire breaking mechanism;

[0039] Step 2: The contact of the first wire break arm comes into contact with the surface of the first material. The first material drives the rotating mounting part to rotate. After the rotating mounting part rotates to a certain angle, the contact of the first wire break arm and the contact of the second wire break arm simultaneously come into contact with the upper surface of the material. The first material is in a deformed state.

[0040] Step 3: The first material continues to move forward, and the contact of the first wire break arm and the contact of the second wire break arm slide on the surface of the first material.

[0041] Step 4: The contact of the second wire-breaking arm slides into the space between the first and second materials; the first material recovers from deformation to flatness, and the first material exerts an upward thrust on the first wire-breaking arm, which transmits power through the rotating component to make the second wire-breaking arm move downward; the contact of the second wire-breaking arm will move below the horizontal plane of the first and second materials, at which point the second material will continue to push the second wire-breaking arm to rotate, and at the same time the blade on the second wire-breaking arm cuts the thread between the first and second materials; the second material continues to push the second wire-breaking arm to rotate, which will cause the contact of the second and third wire-breaking arms to contact the second material and deform the second material, and the contact of the second and third wire-breaking arms will slide on the second material, entering the next cycle.

[0042] In some implementations, the first end of the material may come into contact with the broken wire arm in a collision manner to increase the force between the two.

[0043] The present invention has the following beneficial effects:

[0044] 1. This invention, by incorporating a thread-breaking arm with a contact element, solves the problem of accidental thread breaking, effectively increasing the frequency of thread breaking and achieving rapid thread breaking. The thread-breaking mechanism of this invention has a simple and reliable structure, low manufacturing cost, low processing requirements, and wide applicability; it can be used in conjunction with devices in other processes. The thread-breaking device provided by this invention solves the problem of automatic thread cutting between materials, eliminating the need for manual thread breaking. It offers fast thread breaking speed, consistent thread end condition, and identical breakage positions, thus improving thread breaking efficiency. In this invention, the thread-breaking device and sewing machine form an automated production line, reducing manual labor and increasing production efficiency.

[0045] 2. In this invention, the power to break the wire can come from an electric motor or other electrical device, or from the power generated by the material moving forward. The timing of the wire breaking action depends on the space between the two materials. When the wire breaking is achieved using the power generated by the material's movement, a simple and ingenious mechanical mechanism automates the process of initiating the wire breaking action and breaking the wire. The wire breaking mechanism of this equipment automatically operates when there is material and automatically stops when there is no material, saving energy consumption and effectively avoiding the potential safety risks to personnel caused by continuous equipment operation.

[0046] 3. In this invention, by providing a guide, the material can smoothly reach the break point.

[0047] 4. In this invention, by setting up pressure balls, the material can be conveyed smoothly to the break point, and the break point operation can be achieved smoothly.

[0048] 5. In this invention, the guide, conveyor belt, pressure ball, and wire breaking arm form a cooperative whole, working together to achieve the technical effect of rapid wire breaking. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the overall circuit breaking device.

[0050] Figure 2 This is an exploded view of the wire breaking device.

[0051] Figure 3 This is a schematic diagram of the wire breaking mechanism.

[0052] Figure 4 This is a schematic diagram showing the first material entering the wire breaking device.

[0053] Figure 5 This is a schematic diagram showing the broken wire arm on the side of the first material.

[0054] Figure 6 This is a schematic diagram of a broken wire arm positioned between two materials.

[0055] Figure 7 This is a schematic diagram of the wire-cutting arm cutting the wires between materials.

[0056] Figure 8 This is a schematic diagram of the protective shield.

[0057] Figures 9a-9c This is a schematic diagram of the initial state of the wire breaking device during operation.

[0058] Figure 10-15 This is a schematic diagram of the movement of the wire breaking mechanism during the wire breaking process.

[0059] Appendix Figure 16This is a schematic diagram showing the state of a portion of the first material when the first and second broken wire arms are simultaneously in contact with the surface of the first material.

[0060] The reference numerals in the attached figures are as follows:

[0061] 1. Wire breaking device; 2. Conveying device; 3. Wire breaking mechanism; 4. Wire; 5. Frame; 6. Support part; 7. Guide part; 8. Protective device; 9. First material; 10. Second material; 21. Conveyor belt; 22. Speed ​​regulating motor; 23. Switch; 24. Pressure ball; 31. Shaft; 32. Rotary mounting part; 33. Wire breaking arm; 34. Bearing; 35. Screw; 36. Adjusting mechanism; 361. Bearing seat; 362. Adjusting plate; 331. Knife; 332. Contact element; 333. Contact head; 334. First wire breaking arm; 335. Second wire breaking arm; 336. Third wire breaking arm; 61. First knife groove; 81. Protective cover; 82. Cover plate; 83. Second knife groove. Detailed Implementation

[0062] The following will be combined with the appendix of the present invention. Figure 1-16 The technical solutions in the embodiments of the present invention will be clearly and completely described.

[0063] The structural composition of a wire breaking device according to the present invention is as follows: Figure 1 and Figure 2 As shown, it includes a conveying device 2 and a wire breaking mechanism 3. The conveying device 2 is used for conveying materials, and the wire breaking mechanism 3 is used for breaking the wire.

[0064] The wire breaking device 1 also includes a frame 5, a support 6, a guide 7, and a protective device 8. The support 6 is disposed on the frame 5, and the guide 7 and the wire breaking mechanism 3 are disposed on the support 6. The guide 7 guides the material movement direction; the protective device 8 provides protection for the wire breaking device 1 and also protects the blade 331. During device operation, the operator will not touch the blade edge due to the protective device 8.

[0065] like Figure 3 As shown, the wire breaking mechanism 3 includes a shaft 31, a rotating mounting component 32, and wire breaking arms 33. There are three wire breaking arms 33, mounted on the rotating mounting component 32 at 120° intervals around its circumference. The wire breaking arms 33 are fixed along the tangent of the rotating mounting component 32. A bearing 34 is mounted at the center of the rotating mounting component 32 and positioned at the middle of the shaft 31. The shaft 31 is mounted on an adjusting mechanism 36. The adjusting mechanism 36 allows for vertical adjustment of the shaft 31.

[0066] In some embodiments, the wire break arm 33 can be installed along the radial direction of the rotating mount 32, and the interval angle between the two wire break arms is 120°.

[0067] In some embodiments, the number of the wire-breaking arms 33 can be reasonably set according to the size of the material and the efficiency of wire breaking, for example, one, two, or more.

[0068] In this invention, the rotating mounting component 32 is a cylinder, such as... Figure 3 As shown. A cylinder can reduce rotational resistance, increase rotational inertia, and thus improve rotational efficiency. A bearing 34 is positioned at the center of the rotating mounting component 32, and the rotating mounting component 32 is mounted on the shaft 31 via the bearing 34. The rotating mounting component 32 can be located in the middle of the shaft 31 or, as needed, on one side of the shaft 31. During installation, the rotating mounting component 32 and the bearing 34 can be installed together first, and then the rotating mounting component 32 and the bearing 34 can be installed on the shaft. After installation, ensure that the rotating mounting component 32 can rotate freely on the shaft 31 without jamming, and then install the rotating shaft onto the up-down adjustment mechanism 36. Alternatively, the shaft 31 and the bearing 34 can be combined first, and then the rotating mounting component 32 can be installed on the bearing 34.

[0069] In some embodiments, to improve efficiency, a plurality of rotating mounting parts 32 may be provided on the shaft 31.

[0070] In some embodiments, the cylindrical rotating mounting component 32 can be replaced by a triangular prism, cube, regular pentagonal prism, regular hexagonal prism, etc. The triangular prism facilitates the installation of the wire break arm 33. Since the triangular prism serves as the connecting component between the wire break arm 33 and the shaft 31, it allows the wire break arm 33 to make surface contact with the triangular prism, improving the stability of the wire break arm 33 during installation. One or more fixing points can be used between a wire break arm 33 and the triangular prism.

[0071] In this invention, the wire break arm 33 is fixed to the rotating mounting component 32 by screws 35, such as... Figure 3 As shown.

[0072] In some embodiments, the wire break arm 33 may also be fixed with adhesive or clips.

[0073] In some embodiments, a slot is provided on the outer periphery of the rotating mounting member 32 or other connector, into which the wire break arm 33 can be inserted for fixation by screws 35 or clips.

[0074] Both ends of the shaft 31 are mounted on an adjusting mechanism 36. The adjusting mechanism 36 includes a bearing seat 361 and an adjusting plate 362. The bearing seat 361 is fixed on the upper part of the adjusting plate 362. The adjusting plate 362 is mounted on a frame, and the support part 6 is supported by the frame 5. The position of the adjusting plate 362 relative to the support part 6 is adjustable. The adjusting plate 362 includes two elongated grooves for adjusting the position of the adjusting plate 362 relative to the support part 6 or the conveying device, thereby changing the vertical position of the shaft 31.

[0075] In some embodiments, the position of the shaft 31 can be changed not only in the vertical direction, but also in the front-back and left-right directions, so that the pressure of the wire-breaking arm 33 on the document and the wire 4 is within a suitable range. The position of the shaft 31 can be changed by setting slots or holes, or by using gears and racks, lead screws and nuts, etc.

[0076] In some implementations, the force between the contact and the material is within a suitable range, allowing the rotating component to be driven by the material.

[0077] like Figure 3 As shown, in this invention, the wire-cutting arm 33 includes a blade 331 and a contact member 332. The contact member 332 is located at the first end of the wire-cutting arm 33. The blade includes a cutting edge for cutting the wire, and the contact member 332 includes a contact tip 333. The contact tip 333 is the portion of the contact member 332 that contacts the material when the contact member 332 is above the material. Furthermore, the cutting edge of the blade 331 and the contact tip 333 of the contact member 332 are spaced apart by a predetermined distance. This predetermined distance satisfies the following condition: when the contact tip 333 of the contact member 332 contacts the material, the cutting edge does not cut the wire and does not cut the material. The contact tip 333 is located at the end of the contact member 332.

[0078] In this invention, the contact member 332 is disposed on one side of one end of the wire-breaking arm, and the cutting edge of the blade 331 is disposed on the other side of the one end of the wire-breaking arm, as shown below. Figure 3 As shown. The wire break arm 33 includes a body, and the contact element 332 is integrally formed with the body. Preferably, the contact tip 333 of the contact element 332 includes an arc structure. The arc structure helps protect the surface of the material from being worn or damaged. The end of the contact element 332 is smooth, achieving invisible machining marks and reducing friction on the material.

[0079] In some embodiments, the material of the wire break arm 33 may be 304 stainless steel.

[0080] In some embodiments, the knife can also be a regular wallpaper blade, which is glued to the knife holder.

[0081] In some embodiments, the contact 332 is a component mounted on the body, which facilitates replacement of the contact 332 when it is damaged.

[0082] In some embodiments, both the contact 332 and the blade are integrally formed with the body. This integral forming improves the overall strength of the parts and facilitates force transmission when material pushes the wire-breaking arm. The integrally formed wire-breaking arm simplifies the connection structure and improves the robustness and stability of the device.

[0083] In some embodiments, the width of the contact 332 does not exceed 1 / 4 of the width of the wire breaking arm. Since the wire breaking arm in this application can be easily pushed by materials, and the wire 4 itself is flexible, setting the width of the cutting edge to be wider than the contact of the contact 332 facilitates contact between the cutting edge and the wire 4, ensuring the reliability of the wire breaking operation.

[0084] In some embodiments, the cutting edge is a flat cutting edge. Preferably, in this invention, the cutting edge of the knife is an angled cutting edge, such as... Figure 3 As shown. When the blade is angled, the thread slides more easily along the blade, making it easier to cut.

[0085] In some embodiments, the angle between the inclined blade and the contact member 332 is 15-165 degrees. When the angle between the inclined blade and the contact member 332 is acute, the blade is on the side of the blade adjacent to the contact member 332. This selection further ensures the success rate of wire cutting. When the angle between the inclined blade and the contact member is obtuse, the blade is on the side of the blade away from the contact member. This selection ensures that even if the wire is not cut, the material can continue to move forward without machine jamming. Preferably, the angle between the inclined blade and the contact member is 135 degrees.

[0086] In some embodiments, for ease of wire cutting, the blade is toothed or includes one or more V-shapes.

[0087] like Figure 2 , 4 As shown, the wire breaking device 1 includes a guide section 7, which is mounted on the support section 6. The guide section 7 includes a straight section and an inlet section. The inlet section is located at the front end of the guide section 7 and is used to guide material into the straight section of the guide section 7. The front end of the guide section 7 is adjacent to the material inlet end of the wire breaking device 1. The straight section includes two linear guide rails located on both sides of the material, and the inlet section includes two arc-shaped guide rails located on both sides of the material, the arcs being arranged in an open state.

[0088] In some embodiments, the straight segment of the guide portion 7 includes an upper edge, which is an edge connected to the vertical portion of the straight segment. The upper edge includes a folded portion of the guide portion 7 that folds towards the material side. The upper edge can prevent the end of the material from curling or flipping upwards, allowing the material to move forward in a predetermined direction. Preferably, the cross-section of the folded portion is arc-shaped.

[0089] In some embodiments, the tail of the inlet segment includes a guide edge connected to the upper edge. The guide edge is arc-shaped or inclined to facilitate the smooth introduction of material into the straight segment and avoid the curling or flipping of the material end.

[0090] like Figure 2 As shown, the protective device 8 includes a cover plate 82 and a protective cover 81. The cover plate 82 is located above the conveyor belt 21, covering the guide rail and the first section of the conveyor belt 21, which includes the portion of the conveyor belt 21 that comes into contact with the material. The protective cover 81 is disposed on the cover plate 82, and the cover plate 82 has a second cutter groove 83 corresponding to the protective cover 81, the second cutter groove 83 for a cutter and a rotating mounting component 32 to pass through the cover plate 82. The side plate of the protective cover 81 has holes or grooves for the shaft 31 to pass through.

[0091] The cover plate 82 and the protective cover 81 can be made of transparent materials. The transparent material is acrylic.

[0092] The protective cover 81 and the cover plate can be connected using a positioning groove and magnet, which facilitates disassembly and ensures a secure and reliable fixation. The positioning groove is located in the middle of the cover plate and includes a first surface inside the cover plate with a height difference from its outer surface. The first surface has a second cutting groove. The positioning groove is rectangular.

[0093] like Figure 5-7 As shown, the conveying device 2 includes a conveyor belt 21 and a conveying auxiliary mechanism. In this invention, there are two conveyor belts 21, one end of which is connected to a drive wheel, and the other end to a driven wheel. The drive wheel is connected to a power device via a drive shaft. The power device includes a motor and a switch 23. In this invention, the drive wheel is located at the material inlet end of the wire breaking device, and the motor is located at one end of the drive shaft. A switch 23 is provided on one side of the motor, and the switch 23 can control the speed adjustment or start / stop of the wire breaking device.

[0094] In some embodiments, the switch 23 controlling the speed adjustment and start / stop of the disconnection device can be two switches, one for speed adjustment and the other for start / stop. In some embodiments, start / stop switches are provided at different locations on the device to facilitate emergency shutdown.

[0095] like Figure 2As shown, in this invention, the conveying auxiliary mechanism includes a plurality of pressure balls 24, which are disposed on the cover plate located above the conveyor belt 21. The cover plate has holes for limiting the movement of the pressure balls 24. Each pressure ball 24 corresponds to one hole. The pressure balls 24 can limit the upward movement of the material by gravity.

[0096] In some embodiments, the pressure ball 24 rolls within the holes of the cover plate and will not fall out. In this case, the pressure ball 24 limits the material from above, and the pressure exerted by the pressure ball 24 on the material includes gravity and the pressure exerted by the cover plate on the pressure ball 24. The conveying auxiliary mechanism keeps the various parts of the material in a relatively flat state, reducing friction between the material and the cover plate or other devices.

[0097] In some embodiments, the hole may be a hole through the cover plate or a hole that opens only on one side of the cover plate.

[0098] In some embodiments, the conveying auxiliary mechanism including multiple pressure balls 24 may not be provided. Alternatively, a cover plate can be used to limit the upper part of the material, or another conveyor belt 21 can be provided above the material to facilitate clamping of the material by the conveyor belt 21.

[0099] In this invention, the conveying auxiliary mechanism with multiple pressure balls 24 can greatly improve the material conveying effect, and its protective effect on the material is significantly better than that of the wire breaking device without pressure balls 24.

[0100] In some embodiments, the pressure ball 24 can be made of glass, plastic, rubber, or ceramic. Preferably, the pressure ball 24 is a glass or ceramic ball, which has a smooth surface and a certain weight, making it easier to transport materials. The size of the pressure ball 24 can be one or two centimeters in diameter, or other sizes that are easy to process and install.

[0101] like Figure 2 As shown, the support portion 6 is provided with a first cutting groove 61. When the blade on the rotating mounting member 32 rotates to the side where the support portion 6 is located, a portion of the blade is accommodated by the first cutting groove 61. The first cutting groove 61 is rectangular. The first cutting groove 61 can be a groove that passes through the support portion 6, or it can be a groove with a bottom arm.

[0102] The frame 5 is constructed from 50×50 aluminum profiles, which are durable and easy to transport and assemble. The frame size can be customized according to the height of the sewing machine so that it can be connected to the sewing part of the machine to form an automated production line.

[0103] like Figure 2As shown, to facilitate the repositioning of the wire cutting device, the bottom of the device is equipped with casters. There are four casters, with one caster corresponding to one corner of the frame.

[0104] The material is a document-type product or other sewn product, which can be a paper product or a composite material product. The material is introduced into the thread-breaking device of the present invention in the correct order and angle.

[0105] The power unit is responsible for providing the material received by the guide rail with a suitable speed and power to enter the thread cutting process, and for transferring the material after thread cutting to the next process. This part is also responsible for matching the output speed of the sewing machine, so that the output of the sewing machine after sewing and the output of the thread cutting device are synchronized, and can automatically eliminate the speed difference between the output of the sewing machine and the output of the thread cutting device, so that the two are matched.

[0106] The working method of this invention is as follows:

[0107] In some implementations, the wire disconnection method includes the following steps:

[0108] Step 1: When the first material 9 is conveyed to the inlet of the wire breaking device, the conveying device of the wire breaking device starts to convey the first material 9. The conveying device transports the first material 9 to the wire breaking mechanism. The wire breaking mechanism includes a rotating mounting component. The rotating mounting component is provided with at least 3 wire breaking arms. The at least 3 wire breaking arms include a first wire breaking arm 334, a second wire breaking arm 335, and a third wire breaking arm 336. The first material pushes the first wire breaking arm 334 to drive the rotating mounting component of the wire breaking mechanism to rotate.

[0109] Step 2: When the second wire-breaking arm 335 enters the space between the first material 9 and the second material 10, the contact member at the end of the second wire-breaking arm 335 comes into contact with the second material 10. There is a force between the second material 10 and the contact member of the second wire-breaking arm 335, which drives the rotating mounting part to rotate further. During the rotation, the wire between the first material 9 and the second material 10 is cut by the blade on the second wire-breaking arm 335.

[0110] The number of wire break arms in the above method can also be 4, 5, or 6, as long as the interval between the wire break arms is greater than the length of the first material 9. The wire break arms can be evenly arranged along the rotating mounting component.

[0111] In some implementations, the working method is as follows:

[0112] Step 1: The materials include a first material 9 and a second material 10 arranged sequentially. When the first material 9 is conveyed to the inlet of the wire breaking device, the conveying device 2 of the wire breaking mechanism begins to convey the first material 9, and the conveyor belt 21 of the conveying device 2 transports the first material 9 to the wire breaking mechanism.

[0113] Step 2: The contact element of the first wire-breaking arm 334 comes into contact with the surface of the first material 9. The first material 9 pushes the wire-breaking arm, causing the rotating mounting component 32 to rotate.

[0114] In this method, the initial state of the first wire-breaking arm 334 can be either vertical relative to the first material 9 or inclined relative to the first material 9. In either of these states, the first material 9 can be pushed. Figures 9a-9c As shown. In the initial state of the first wire-breaking arm 334, which is inclined relative to the first material 9, the angle formed between the first wire-breaking arm 334 and the first material 9 can be either obtuse or acute. The first end of the first material 9 contacts the first wire-breaking arm 334 first. Before contact, the first end of the first material 9 is positioned higher than the contact tip 333 of the contact member 332 of the first wire-breaking arm 334. The contact tip can be located at the distal end of the contact member along the extending direction of the first wire-breaking arm 334. The shape and thickness of the contact member are not limited to those shown in this invention and can be adjusted according to the relative movement trajectory of the first material 9 when it contacts the contact member, so that the relative movement between the two facilitates wire breaking.

[0115] Step 3: When the first material 9 has entered a certain distance, the rotating mounting component 32 continues to rotate a certain angle until the contact element of the first wire breakage arm and the contact element of the second wire breakage arm 335 simultaneously contact the same surface of the material. Figure 10-12 As shown. At this time, due to the pressure from the two broken wire arms, the cross-section of the pressure-bearing area of ​​the first material 9 is concave, as shown. Figure 16 As shown, the first material 9 continues to move forward, and the contact of the first wire break arm 334 and the contact of the second wire break arm 335 slide on the surface of the first material 9.

[0116] Step 4: The second wire-breaking arm 335 slides into the space between the first material 9 and the second material 10. At this time, the contact element of the first wire-breaking arm 334 is still on the surface of the first material 9. The first material 9 gradually recovers its flatness from deformation, and the first material 9 generates an upward thrust F on the first wire-breaking arm 334, such as... Figure 13As shown. When the second wire-cutting arm 335 moves to the first end of the second material 10, the contact member at the end of the second wire-cutting arm 335 comes into contact with the second material 10. There is a force between the second material 10 and the contact member of the second wire-cutting arm 335, which drives the rotating mounting part to rotate further. During the rotation, the wire between the first material 9 and the second material 10 is cut by the blade on the second wire-cutting arm 335.

[0117] Step 5: The thread between the first material and the second material has been cut, and the first material 9 is discharged from the thread-cutting machine.

[0118] Step 6: Now, begin Step 2 and enter the next cycle. Each time a wire breaking operation is completed, the wire breaking mechanism rotates 120°.

[0119] Among them, the appendix Figure 16 This is a schematic diagram of the deformation of the first material. The specific deformation shape is affected by factors such as the material selection of the first material and the pressure setting of the broken wire arm on the material.

[0120] In some implementations, the material is positioned higher than the contact point of the wire break arm to facilitate pushing the wire break arm.

[0121] In some implementations, the height of the material on the conveying device can fluctuate. When the wire break arm contacts the surface of the material, the height of the material decreases; when the wire break arm leaves the material, the height of the material increases.

[0122] In some implementations, the wire break arm can be installed by extending along the tangent of the rotating mount, along the radius of the rotating mount, or by other installation methods that facilitate installation and wire breakage.

[0123] The working principle of this invention is as follows:

[0124] When the contact element is in contact with the material surface, the blade will not contact the material or the wire due to the preset distance between the contact tip and the blade. Therefore, the material and wire will not be cut by the blade. When the wire-breaking arm is between the materials, the contact element no longer contacts the upper part of the material. At this time, the wire is suspended in the air, and the blade of the wire-breaking arm contacts the wire, cutting it off.

[0125] Regarding the pressure between the contact and the material, it is selected by adjusting the height of the rotating mounting member 32 according to the thickness and material of the material. The height of the rotating mounting member can be adjusted by the adjusting mechanism 36 to a state where the two adjacent contact members can press the material with a little force. The force between the surface of the material and the contact is converted into a force that causes the rotating mounting member 32 to rotate when the second wire breaking arm 335 slides between the first material 9 and the second material 10. The thrust of the first end of the material on the wire breaking arm is converted into a force that causes the rotating mounting member 32 to rotate. The above two forces together complete the entire working process.

[0126] In some implementations, the thrust of the first end of the material against the break arm plays a major role in the breakage.

[0127] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can also refer to the internal communication between two components. The indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are for ease of description only, not to imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0128] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Any person skilled in the art can make many possible variations and modifications to the technical solution of the present invention, or modify it into equivalent embodiments, without departing from the scope of the present invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technology of the present invention without departing from the scope of the present invention are within the protection scope of the present invention.

Claims

1. A wire breaking mechanism, characterized in that: The wire breaking mechanism includes a wire breaking arm (33), which includes a blade (331) and a contact (332). The contact (332) is located at the end of the wire breaking arm (33). The blade is used to break the wire, and the contact (332) includes a contact (333). The blade (331) includes a cutting edge for breaking the wire, and there is a gap between the cutting edge and the contact (333). The spacing satisfies the following conditions: the four edges of the material in a flat state are respectively the first end, the second end, the third end, and the fourth end; the surface of the material is the surface of the material surrounded by the first end, the second end, the third end, and the fourth end; the spacing between the blade and the contact is greater than or equal to the minimum distance, which is the shortest distance between the blade and the contact when the contact contacts the surface of the material, satisfying the condition that the blade does not cut the line and the material. The contact (333) and the blade are elastically mounted on the wire breaking arm. The wire breaking arm is provided with a blade receiving part. When the contact comes into contact with the surface of the material, the contact is pressured and drives the blade to retract into the blade receiving part of the wire breaking arm. When the contact leaves the surface of the material, the blade extends out from the receiving part of the wire breaking arm. The contact (333) of the contact element (332) includes an arc structure.

2. The wire breaking mechanism as described in claim 1, characterized in that: The spacing satisfies the following condition: the spacing is greater than or equal to the layer thickness of the component that can cover the blade edge.

3. The wire breaking mechanism as described in claim 1 or 2, characterized in that: The blade has an inclined blade edge, and the angle between the inclined blade edge and the contact member (332) is 15-165°. And / or, the contact (332) is provided on one side of the end of the wire break arm (33), and the blade is provided on the other side of the end of the wire break arm (33).

4. The wire breaking mechanism as described in claim 3, characterized in that: The contact (332) includes one; and / or, the width of the contact (332) does not exceed 1 / 4 of the width of the wire break arm (33).

5. The wire breaking mechanism as described in claim 1, 2, or 4, characterized in that: The blade has an angled edge or a flat edge.

6. The wire breaking mechanism as described in claim 1, 2, or 4, characterized in that: The wire breaking mechanism also includes a rotating mounting component (32), and the wire breaking arm (33) is mounted on the rotating mounting component (32). The rotating mounting component (32) is a cylinder, a triangular prism, a cube, a cuboid, a regular pentagon, or a regular hexagon.

7. The wire breaking mechanism as described in claim 6, characterized in that: The rotating mounting component (32) is a cylinder, and there are three wire break arms (33). The three wire break arms (33) are mounted on the rotating mounting component (32) and are installed at intervals of 120°.

8. The wire breaking mechanism as described in claim 6, characterized in that: One end of the wire break arm (33) is mounted on the rotating mounting member (32), and the wire break arm (33) extends along the tangential direction of the rotating mounting member (32).

9. The wire breaking mechanism as described in claim 6, characterized in that: The wire breaking mechanism also includes a shaft (31) and an adjusting mechanism (36). A rotating mounting part (32) is provided on the shaft (31). A bearing (31) is provided between the rotating mounting part (32) and the shaft (31). The adjusting mechanism (36) adjusts the position of the shaft (31) up and down. The shaft (31) is mounted on the adjusting mechanism (36) through the bearing (31). The adjusting mechanism (36) includes a bearing seat (361) and an adjusting plate (362). The bearing seat (361) is fixed on the adjusting plate (362), or the bearing seat (361) and the adjusting plate (362) are elastically connected by a spring structure or by an elastically deformable material.

10. A wire breaking mechanism, characterized in that: The wire breaking mechanism includes a wire breaking arm (33), which includes a blade (331) and a contact (332). The contact (332) is located at the end of the wire breaking arm (33). The blade is used to break the wire, and the contact (332) includes a contact (333). The blade (331) includes a cutting edge for breaking the wire, and there is a gap between the cutting edge and the contact (333). The spacing satisfies the following conditions: the four edges of the material in a flat state are respectively the first end, the second end, the third end, and the fourth end; the surface of the material is the surface surrounded by the first end, the second end, the third end, and the fourth end; the spacing between the blade and the contact is greater than or equal to a minimum distance, which is the shortest distance between the blade and the contact when the contact contacts the surface of the material, satisfying the condition that the blade does not cut the line and the material. The contact (333) and the blade are elastically mounted on the wire breaking arm. The wire breaking arm is provided with a blade receiving part. When the contact comes into contact with the surface of the material, the contact is pressured and drives the blade to retract into the blade receiving part of the wire breaking arm. When the contact leaves the surface of the material, the blade extends out from the receiving part of the wire breaking arm. The contact (333) of the contact element (332) includes an arc structure; The blade edge includes one or more V-shapes, and / or the contact (332) includes two or more contacts (333).

11. The wire breaking mechanism as described in claim 10, characterized in that: The spacing satisfies the following condition: the spacing is greater than or equal to the layer thickness of the component that can cover the blade edge.

12. The wire breaking mechanism as described in claim 10, characterized in that: The blade has an inclined blade edge, and the angle between the inclined blade edge and the contact member (332) is 15-165°. And / or, the contact (332) is provided on one side of the end of the wire break arm (33), and the blade is provided on the other side of the end of the wire break arm (33).

13. The wire breaking mechanism as described in claim 12, characterized in that: The width of the contact (332) does not exceed 1 / 4 of the width of the wire break arm (33).

14. The wire breaking mechanism as described in claim 10 or 13, characterized in that: The wire breaking mechanism also includes a rotating mounting component (32), and the wire breaking arm (33) is mounted on the rotating mounting component (32). The rotating mounting component (32) is a cylinder, a triangular prism, a cube, a cuboid, a regular pentagon, or a regular hexagon.

15. The wire breaking mechanism as described in claim 14, characterized in that: The rotating mounting component (32) is a cylinder, and there are three wire break arms (33). The three wire break arms (33) are mounted on the rotating mounting component (32) and are installed at intervals of 120°.

16. The wire breaking mechanism as described in claim 10, characterized in that: One end of the wire break arm (33) is mounted on the rotating mounting member (32), and the wire break arm (33) extends along the tangential direction of the rotating mounting member (32).

17. The wire breaking mechanism as described in claim 10, characterized in that: The wire breaking mechanism also includes a shaft (31) and an adjusting mechanism (36). A rotating mounting part (32) is provided on the shaft (31). A bearing (31) is provided between the rotating mounting part (32) and the shaft (31). The adjusting mechanism (36) adjusts the position of the shaft (31) up and down. The shaft (31) is mounted on the adjusting mechanism (36) through the bearing (31). The adjusting mechanism (36) includes a bearing seat (361) and an adjusting plate (362). The bearing seat (361) is fixed on the adjusting plate (362), or the bearing seat (361) and the adjusting plate (362) are elastically connected by a spring structure or by an elastically deformable material.

18. A wire breaking mechanism, characterized in that: The wire breaking mechanism includes a wire breaking arm (33), which includes a blade (331) and a contact (332). The contact (332) is located at the end of the wire breaking arm (33). The blade is used to break the wire, and the contact (332) includes a contact (333). The blade (331) includes a cutting edge for breaking the wire, and there is a gap between the cutting edge and the contact (333). The spacing satisfies the following conditions: the four edges of the material in a flat state are respectively the first end, the second end, the third end, and the fourth end; the surface of the material is the surface surrounded by the first end, the second end, the third end, and the fourth end; the spacing between the blade and the contact is greater than or equal to a minimum distance, which is the shortest distance between the blade and the contact when the contact contacts the surface of the material, satisfying the condition that the blade does not cut the line and the material. The contact (333) and the blade are elastically mounted on the wire breaking arm. The wire breaking arm is provided with a blade receiving part. When the contact comes into contact with the surface of the material, the contact is pressured and drives the blade to retract into the blade receiving part of the wire breaking arm. When the contact leaves the surface of the material, the blade extends out from the receiving part of the wire breaking arm. The contact (333) of the contact element (332) includes an arc structure; The wire break arm includes a body, the contact (332) and the blade are disposed on the body, and the body is made of a flexible material; The blade edge includes one or more V-shapes, and / or the contact (332) includes two or more contacts (333).

19. A wire breaking device, characterized in that: The invention includes a wire-cutting mechanism comprising a wire-cutting arm (33), the wire-cutting arm (33) including a blade (331) and a contact member (332), the contact member (332) being disposed at the end of the wire-cutting arm (33), the blade being used for cutting the wire, the contact member (332) including a contact tip (333), the blade (331) including a cutting edge for cutting the wire, and a gap being present between the cutting edge and the contact tip (333). The spacing satisfies the following conditions: the four edges of the material in a flat state are respectively the first end, the second end, the third end, and the fourth end; the surface of the material is the surface of the material surrounded by the first end, the second end, the third end, and the fourth end; the spacing between the blade and the contact is greater than or equal to the minimum distance, which is the shortest distance between the blade and the contact when the contact contacts the surface of the material, satisfying the condition that the blade does not cut the line and the material. The contact (333) and the blade are elastically mounted on the wire-breaking arm. The wire-breaking arm is provided with a blade receiving portion. When the contact comes into contact with the surface of the material, the contact is subjected to pressure and drives the blade to retract into the blade receiving portion of the wire-breaking arm. When the contact leaves the surface of the material, the blade extends out from the receiving portion of the wire-breaking arm. The contact (333) of the contact member (332) includes an arc structure. The wire breaking device also includes a conveying device (2) and a protective device (8). The conveying device (2) is used to convey materials. The protective device (8) includes a protective cover (81) for protecting the broken wire arm (33). The protective cover (81) and the cover plate (82) are made of transparent acrylic material. The protective cover is connected to the cover plate by magnetic force. The connection method between the protective cover and the cover plate is to use a positioning groove plus a magnet. The positioning groove includes a first surface, which is inside the cover plate and has a height difference with the outer surface of the cover plate. The first surface is provided with a second cutting groove. The positioning groove is rectangular.

20. The wire breaking device as described in claim 19, characterized in that: The protective device (8) also includes a cover plate (82). The conveying device (2) includes a conveyor belt (21), a power unit and a conveying auxiliary mechanism. The conveyor belt (21) is connected to the power unit. The power unit includes a motor (22). The motor (22) provides power for the movement of the conveyor belt (21). The conveying auxiliary mechanism includes a plurality of pressure balls (24). The plurality of pressure balls (24) are disposed on the cover plate (82). The cover plate (82) is disposed on the upper side of the conveyor belt (21). The cover plate (82) is provided with holes for limiting the pressure balls (24). The pressure balls are pressed onto the material by the pressure of the pressure plate and / or gravity.

21. The wire breaking device as described in claim 19 or 20, characterized in that: The wire breaking device includes a guide section (7), which includes a straight section and an inlet section, the inlet section including an arc-shaped guide rail.

22. The wire breaking device as described in claim 21, characterized in that: The straight section of the guide (7) includes an upper edge, which is an edge connected to the vertical part of the straight section. The upper edge can prevent the end of the material from curling or turning up, so that the material moves forward in a predetermined direction; and / or, the tail of the inlet section includes a guide edge, which is arc-shaped or inclined, for smoothly introducing the material into the straight section.

23. The wire breaking device as described in claim 19, 20 or 22, characterized in that: The wire breaking device also includes a support part (6), which is used to support the conveyor belt (21) of the material and conveying device (2). The support part (6) is provided with a first cutter groove (61). When the wire breaking arm (33) moves to the support part (6), a part of the wire breaking arm (33) is accommodated by the first cutter groove (61).

24. A sewing machine, characterized in that: It includes the wire breaking mechanism as described in any one of claims 1-18, or the wire breaking device as described in any one of claims 19-23.

25. An automatic printing device, characterized in that: It includes the thread breaking mechanism as described in any one of claims 1-18, or the thread breaking device as described in any one of claims 19-23, or the sewing machine as described in claim 24.

26. A method for breaking a wire, characterized in that, The thread-breaking method uses the thread-breaking device as described in any one of claims 19-23, the sewing machine as described in claim 24, or the automatic printing equipment as described in claim 25, and the thread-breaking method includes the following steps: Step 1: When the first material (9) is conveyed to the inlet of the wire breaking device, the conveying device (2) of the wire breaking device starts to convey the first material (9). The conveying device (2) transports the first material (9) to the wire breaking mechanism. The wire breaking mechanism includes a rotating mounting component (32). The rotating mounting component (32) is provided with at least three wire breaking arms (33). The at least three wire breaking arms (33) include a first wire breaking arm (334), a second wire breaking arm (335), and a third wire breaking arm (336). The first material (9) pushes the first wire breaking arm (334) to drive the rotating mounting component (32) of the wire breaking mechanism to rotate. Step 2: The second wire-cutting arm (335) enters the space between the first material and the second material (10). The second wire-cutting arm (335) continues to move. The contact member (332) at the end of the second wire-cutting arm (335) contacts the first end of the second material and drives the rotating mounting member (32) to rotate further. During the rotation, the wire between the first material (9) and the second material (10) contacts the blade on the second wire-cutting arm (335) and the wire is cut.

27. A method for breaking a wire, characterized in that, The thread-breaking method uses the thread-breaking device as described in any one of claims 19-23, the sewing machine as described in claim 24, or the automatic printing equipment as described in claim 25. The thread-breaking mechanism includes a first thread-breaking arm (334), a second thread-breaking arm (335), and a third thread-breaking arm (336). The thread-breaking method includes the following steps: Step 1: The conveying device (2) transports the first material (9) to the wire breaking mechanism; Step 2, the contact of the first wire break arm (334) comes into contact with the surface of the first material (9), the first material (9) drives the rotating mounting part (32) to rotate, after the rotating mounting part (32) rotates a certain angle, the contact of the first wire break arm (334) and the contact of the second wire break arm (335) simultaneously come into contact with the surface of the material, and the first material is in a deformed state; Step 3, the first material (9) continues to move forward, and the contact of the first wire break arm (334) and the contact of the second wire break arm (335) slide on the surface of the first material (9); Step 4: The contact of the second wire-breaking arm (335) slides into the space between the first material (9) and the second material (10); the first material (9) recovers from deformation to flatness, and the first material (9) generates an upward thrust on the first wire-breaking arm (334). Through the rotating mounting component (32), the power is transmitted, and the second wire-breaking arm (335) will receive a downward thrust. When the second wire-breaking arm (335) is pushed by the second material (10), the second wire-breaking arm (335) transmits the thrust received to the third wire-breaking arm (336) through the rotating mounting component. The thrust is converted into the force of movement of the third wire-breaking arm (336) through the rotating mounting component; the second wire-breaking arm (335) is driven by the second material... Material (10) is pushed forward, and the second wire-breaking arm (335) will rotate to below the horizontal plane between the first material (9) and the second material (10). During the rotation, the wire between the first material (9) and the second material (10) is cut off. The second wire-breaking arm (335) is pushed by the second material (10) and drives the rotating mounting part to rotate further. During the rotation, the contact parts of the second wire-breaking arm (335) and the third wire-breaking arm (336) will contact the surface of the second material (10) and cause the second material (10) to deform. The contact parts of the second wire-breaking arm (335) and the third wire-breaking arm (336) slide on the second material (10) and enter the next cycle.

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