Automatic Bundling and Cutting Machine for Filamentous Materials
By designing automatic bundling and cutting machines, using components such as pneumatic chucks, pneumatic scissors and aluminum nail machines, automatic cutting and bundling of filamentous materials are realized, and the problems of high labor intensity and low production efficiency in the existing technology are solved. Improved productivity and automation.
Patent Information
- Application Number
- CN202011237363.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-11-09
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2040-11-09
AI Technical Summary
In the prior art, the section cutting and bundling of filamentous materials have high labor intensity and low production efficiency.
Design a filamentous material automatic bundling and cutting machine including a stent system, a cutting system and a bundling system. The cutting system consists of a pneumatic chuck, a pneumatic scissors and a finger cylinder. The bundling system has a built-in aluminum nail machine, which realizes continuous bundling and cutting through a continuous drive mechanism and an automatic nail feeding mechanism.
The continuous automatic cutting and bundling of filamentous materials are realized, production efficiency is improved, labor intensity is reduced, and the equipment has a high degree of automation, good reliability and high stability.
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Figure CN112369800B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a material segmented bundling device, in particular to an automatic bundling and cutting machine for filamentary materials. Background Art
[0002] Filamentous materials refer to raw materials with filamentary structures used in production. Such raw materials are usually produced by wire drawing or die extrusion. After the production of filamentous materials, they are mostly rolled up using reels. Therefore, when using filamentous materials to produce specific products, it is usually necessary to cut the filamentous materials into several small segments of equal length in advance, and even to bundle the small segments into bundles of filaments. For example, when using plastic flat wire to make sanitation brooms, the production process is: first cut the flat wire into several small segments of equal length, then bundle the small segments into bundles of flat wires, and finally install the bundled flat wires at the front end of the broom handle.
[0003] In the prior art, the segmented cutting and bundling of filamentary materials are mostly done manually, which is labor-intensive and has low production efficiency. Summary of the invention
[0004] In view of this, the present invention provides an automatic bundling and cutting machine for filamentary materials to solve the technical problems in the prior art of high labor intensity and low production efficiency in segmented cutting and bundling of filamentary materials.
[0005] To achieve the above purpose, the technical solution of the present invention is as follows:
[0006] An automatic bundling and cutting machine for filamentous materials, the key of which is: comprising a bracket, on which a supporting system, a cutting system and a bundling system are installed;
[0007] The cutting system includes a pneumatic chuck, pneumatic scissors, and a finger cylinder movably arranged on a bracket through a driving assembly, and the bundling system is built with an aluminum nail machine, which has a bundling opening;
[0008] The pneumatic chuck, pneumatic scissors and bundling opening are arranged in sequence in the direction away from the supporting system. Under the action of the driving component, the finger cylinder can pull the filamentary material to be cut from between the supporting system and the pneumatic chuck to the pneumatic scissors and the bundling opening position. The pneumatic chuck can clamp the filamentary material when the pneumatic scissors and the aluminum nail machine perform the action. The bundling action performed by the aluminum nail machine precedes the cutting action of the pneumatic scissors.
[0009] With the above structure, the filamentary materials are supported on the supporting system. Under the driving action of the driving component, the finger cylinder pulls the filamentary materials into the working area of the pneumatic scissors and the bundling opening, and then the aluminum nail machine and the pneumatic scissors perform the bundling and cutting actions in turn, thereby completing the cutting and bundling of the filamentary materials, which has technical advantages such as high degree of automation and high production efficiency.
[0010] Preferably, the material support system comprises a clustering tube, a first tensioning wheel and a second tensioning wheel which are sequentially arranged along the conveying direction of the filamentary material, and the first tensioning wheel and the second tensioning wheel are rotatably mounted on the bracket. The above structure is adopted to support the material, and the clustering tube can allow several strands of flat wire to be sent to the bottom of the cutting system in a bundle form, which is convenient for subsequent bundling.
[0011] Preferably, the first tension wheel is located above the second tension wheel, and the second tension wheel and the pneumatic chuck are located at the same height. With the above structure, the flat wire is in a horizontal position during bundling and cutting, which can ensure the stability of bundling and cutting.
[0012] As a preference: the bundling system is provided with an automatic nail feeding mechanism and a continuous driving mechanism, wherein the continuous driving mechanism can drive the aluminum nail machine to perform the bundling action cyclically, and the automatic nail feeding mechanism can feed aluminum nails into the aluminum nail inlet of the aluminum nail machine before the aluminum nail machine performs each bundling action. The above structure can ensure that the aluminum nail machine automatically and continuously performs the bundling action, so that the equipment has a higher degree of automation.
[0013] Preferably, the continuous driving mechanism comprises a first cylinder fixed on the bracket, and a turntable fixedly connected to the driving shaft of the aluminum nail machine, a traction rope is wound around the circumference of the turntable, and the other end of the traction rope is fixedly connected to the piston rod of the first cylinder. With the above structure, the piston rod of the first cylinder can be extended inward to drive the aluminum nail machine to perform the bundling action.
[0014] Preferably, the first bolts are evenly distributed on the circumferential edge of the turntable, the first bolts are vertically penetrated on the turntable, the first bolts are connected with nuts at the positions corresponding to the upper and lower sides of the turntable, the traction rope is wound around the outer side of each first bolt along the circumference of the turntable; the middle part of the turntable is provided with a connecting column extending upward for connecting the driving shaft of the aluminum nail machine. The above structure is adopted to facilitate the installation of the traction rope around the turntable.
[0015] As a preferred embodiment, the automatic nail feeding mechanism comprises a nail material conduit and a nail pushing cylinder which are coaxially arranged. The nail material conduit is a hollow structure, and one end thereof away from the nail pushing cylinder is connected to the aluminum nail inlet of the aluminum nail machine. A feeding push rod is connected to the cylinder rod of the nail pushing cylinder, and the feeding push rod is slidably arranged in the nail material conduit. A feeding hole is arranged on the upper side of the nail material conduit, and a nail material bin is fixedly installed at the position corresponding to the feeding hole. With the above structure, the cylinder rod 4b3 of the nail pushing cylinder 4b2 can realize automatic nail feeding by reciprocating motion.
[0016] Preferably, the pneumatic chuck has two clamping blocks that can approach each other, one of the clamping blocks has a protrusion on its inner side, and the other clamping block has a positioning groove that is adapted to the protrusion on its inner side. The above structure can ensure that the flat wire material is firmly clamped on the pneumatic chuck.
[0017] Preferably, the driving assembly includes a support plate slidably mounted along the length direction of the bracket, a moving cylinder driving the support plate to slide, and a lifting cylinder fixedly mounted on the support plate, wherein a connecting plate is fixedly mounted on the piston rod of the lifting cylinder, and the finger cylinder is fixed on the connecting plate. With the above structure, the working of the moving cylinder and the lifting cylinder can drive the finger cylinder to move under the cutting system 3.
[0018] Compared with the prior art, the present invention has the following beneficial effects:
[0019] 1. It can continuously and automatically cut the filamentary materials into small segments and complete the bundling of each small segment, with technical advantages such as high degree of automation and high production efficiency.
[0020] 2. Under the coordinated action of the automatic nail feeding mechanism and the continuous driving mechanism, the aluminum nail machine can perform continuous bundling operations, so that the equipment can be fully automated.
[0021] 3. The structural design of each functional system and the overall equipment is reasonable, with technical advantages such as good reliability, high stability and long service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a structural diagram of the automatic bundling and cutting machine for filamentary materials (the finger cylinder is located on the left side of the pneumatic chuck);
[0023] Figure 2 It is a structural diagram of the automatic bundling and cutting machine for filamentary materials (the finger cylinder is located on the right side of the pneumatic chuck);
[0024] Figure 3 This is a structural diagram showing the internal working principle of the aluminum nail machine;
[0025] Figure 4 It is a structural schematic diagram of a continuous drive mechanism;
[0026] Figure 5 It is a structural schematic diagram of the automatic nail feeding mechanism;
[0027] Figure 6 It is a structural schematic diagram of a nail material conduit;
[0028] Figure 7 It is a structural schematic diagram of a pneumatic chuck;
[0029] Figure 8 It is the structural schematic diagram of the finger cylinder. DETAILED DESCRIPTION
[0030] The present invention is further described below in conjunction with embodiments and drawings.
[0031] This embodiment is described in detail by taking the filamentary material as a plastic flat filament 6 used to manufacture a broom as an example.
[0032] like Figure 1 As shown, an automatic bundling and cutting machine for filamentary materials, the core mechanisms of the equipment include: a supporting system 2, a cutting system 3 and a bundling system 4, and the supporting system 2, the cutting system 3 and the bundling system 4 are all installed on a bracket 1.
[0033] The supporting system 2 includes a clustering tube 2a, a first tensioning wheel 2b and a second tensioning wheel 2c which are sequentially arranged along the conveying direction of the flat wire 6. The first tensioning wheel 2b and the second tensioning wheel 2c are rotatably mounted on the bracket 1. The clustering tube 2a can allow several strands of flat wire 6 to be fed into the bottom of the cutting system 3 in a bundled form, thereby facilitating subsequent bundling.
[0034] For example Figure 1 and 2 As shown, the cutting system 3 includes a pneumatic chuck 3a, a pneumatic scissors 3b, and a finger cylinder 3d movably arranged on the bracket 1 through a driving component 3c, and the bundling system 4 has an aluminum nail machine 4a, and the aluminum nail machine 4a has a bundling opening 4a1. The pneumatic chuck 3a, the pneumatic scissors 3b and the bundling opening 4a1 are sequentially arranged in a direction away from the second tensioning wheel 2c. The finger cylinder 3d can, under the action of the driving component 3c, pull the bundled flat wire 6 to be cut from between the second tensioning wheel 2c and the pneumatic chuck 3a to the position of the pneumatic scissors 3b and the bundling opening 4a1, and then the aluminum nail machine 4a and the pneumatic scissors 3b perform bundling and cutting actions respectively.
[0035] like Figure 3 As shown, the aluminum nail machine 4a is an existing mature product, and only its main working principle is described below:
[0036] The aluminum nail machine 4a includes built-in connecting rods a, connecting rods b, connecting rods c, connecting rods d, fixed blocks e, top pressure blocks f and mounting base g. The connecting rods a, connecting rods b and connecting rods c are hinged in sequence. The connecting rod a is fixedly installed away from the connecting rod b with a driving shaft 4a2. The driving shaft 4a2 is rotatably arranged on the mounting base g through a spring h. The two ends of the connecting rod d are respectively hinged on the connecting rod b and the fixed block e. The end of the connecting rod c away from the connecting rod b is hinged on the top pressure block f. The top pressure block f is slidably installed on the fixed block. e, the front end of the fixed block e is provided with an aluminum nail entrance 4a3 and the above-mentioned bundling opening 4a1 in sequence, the aluminum nail entrance 4a3 is equipped with an aluminum nail 10, based on the structural arrangement of the aluminum nail machine 4a, the driving shaft 4a2 drives the connecting rod a to rotate on the mounting seat g, and the top pressure block f can be driven to slide forward on the fixed block e, so that the top pressure block f pushes the aluminum nail 10 from the aluminum nail entrance 4a3 to the bundling opening 4a1, thereby completing the bundling work of the bundled flat wire 6 in the bundling opening 4a1.
[0037] Further, such as Figure 4 and 5 As shown, in order to realize full automation of the equipment, the bundling system 4 is provided with an automatic nail feeding mechanism 4b and a continuous driving mechanism 4c, wherein the continuous driving mechanism 4c can drive the above-mentioned aluminum nail machine 4a to cyclically perform the bundling action, that is, drive the driving shaft 4a2 of the aluminum nail machine 4a to reciprocate, and the automatic nail feeding mechanism 4b can feed the aluminum nails 10 into the aluminum nail inlet 4a3 before the aluminum nail machine 4a performs each bundling action.
[0038] For example Figure 4 As shown, the specific structural layout of the continuous driving mechanism 4c is as follows:
[0039] The main parts of the continuous drive mechanism 4c are: the first cylinder 4c1, the turntable 4c2, and the traction rope 4c3, wherein four first bolts 4c4 are distributed on the upper edge of the turntable 4c2, and the first bolts 4c4 are vertically penetrated on the turntable 4c2, and the first bolts 4c4 are connected with nuts 4c5 at the positions corresponding to the upper and lower sides of the turntable 4c2. When the first bolts 4c4 and the turntable 4c2 are assembled, the upper nut 4c5 is first screwed on the first bolt 4c4, and then the lower end of the first bolt 4c4 is inserted into the turntable 4c2, and finally the lower nut 4c5 is screwed on the lower end of the first bolt 4c4. The traction rope 4c3 is a metal wire, one end of which is wound around each first bolt 4c4 along the circumference of the turntable 4c2, and the other end is fixedly wound around the piston rod 4c11 of the first cylinder 4c1, and the first cylinder 4c1 is fixed on the bracket 1 of the equipment.
[0040] A connecting column 4c6 extending upward is provided in the middle of the turntable 4c2, and the connecting column 4c6 is fixedly connected to the driving shaft 4a2 of the aluminum nail machine 4a. The piston rod 4c11 of the first cylinder 4c1 can be extended and retracted inward to drive the turntable 4c2 to move through the traction rope 4c3, thereby driving the driving shaft 4a2 of the aluminum nail machine 4a to rotate. After the aluminum nail machine 4a completes a bundling action, the spring h on the driving shaft 4a2 drives the turntable 4c2 and the traction rope 4c3 to reset.
[0041] For example Figure 5 and 6 As shown, the specific structural layout of the automatic nail feeding mechanism 4b is as follows:
[0042] The automatic nail feeding mechanism 4b includes a nail material conduit 4b1, which is a square tube with a hollow structure inside. A rectangular feeding hole 4b5 is provided on the upper side of the nail material conduit 4b1, and a nail material bin 4b6 is fixedly installed at a position corresponding to the feeding hole 4b5. The nail material bin 4b6 is a rectangular box structure with both upper and lower ends open. A nail pushing cylinder 4b2 is coaxially arranged at the far right end of the nail material conduit 4b1, and a feeding push rod 4b4 is slidably arranged inside the right end of the nail material conduit 4b1, and the feeding push rod 4b4 is fixedly connected to the cylinder rod 4b3 of the nail pushing cylinder 4b2.
[0043] The nail pushing cylinder 4b2 is provided with a support 1c fixedly connected to the bracket 1, and one end of the nail material conduit 4b1 away from the nail pushing cylinder 4b2 is connected to the aluminum nail entrance 4a3 of the aluminum nail machine 4a. The aluminum nails 10 are stacked in rows in the nail material bin 4b6, and the aluminum nails 10 at the bottom layer fall into the nail material conduit 4b1 through the feed hole 4b5. The feed hole 4b5 is designed to limit the aluminum nails 10 to fall into the nail material conduit 4b1 in a row or one by one manner. After the continuous driving mechanism 4c drives the aluminum nail machine 4a to perform each bundling action, the cylinder rod 4b3 of the nail pushing cylinder 4b2 moves forward to push the aluminum nails 10 to the aluminum nail entrance 4a3, thereby realizing automatic nail feeding.
[0044] For example Figure 1 and 2 As shown, the structure of the driving assembly 3c that drives the finger cylinder 3d to move on the bracket 1 is as follows:
[0045] Two groups of guide columns 1a extending along the length direction are installed on the bracket 1, and the driving component 3c includes a support plate 3c1 slidably mounted on the two groups of guide columns 1a, a moving cylinder 3c2 driving the support plate 3c1 to slide, and a lifting cylinder 3c3 fixedly installed on the support plate 3c1, a connecting plate 3c4 is fixedly installed on the piston rod of the lifting cylinder 3c3, and the finger cylinder 3d is fixed on the connecting plate 3c4. The moving cylinder 3c2 drives the finger cylinder 3d to move in the horizontal direction, and the lifting cylinder 3c3 drives the finger cylinder 3d to move in the vertical direction.
[0046] Furthermore, in order to facilitate the automatic collection and bundling of the cut flat wire bundles, the area between the two groups of guide columns 1a of the bracket 1 is a hollow structure 1b, the pneumatic chuck 3a, the pneumatic scissors 3b and the bundling opening 4a1 are all located above the hollow structure 1b, and a finished product frame 5 is provided below the hollow structure 1b.
[0047] The working process of the equipment provided by the present invention to realize continuous bundling and cutting is as follows:
[0048] Step 1: A flat wire bundle formed by integrating a plurality of flat wires 6 passes through the cluster tube 2a, and then is stretched and straightened by the first tensioning wheel 2b and the second tensioning wheel 2c, and then the end of the flat wire 6 is clamped by the pneumatic clamp 3a.
[0049] Step 2: Under the coordinated action of the moving cylinder 3c2 and the lifting cylinder 3c3, the finger cylinder 3d moves to the left side of the pneumatic chuck 3a to clamp the flat wire 6 ( Figure 1 After the finger cylinder 3d clamps the flat wire 6, the pneumatic chuck 3a releases the clamping force.
[0050] Step 3: Under the coordinated action of the moving cylinder 3c2 and the lifting cylinder 3c3, the finger cylinder 3d moves to the rightmost end ( Figure 2 When the finger cylinder 3d moves to the rightmost position, the pneumatic clamp 3a clamps the flat wire 6 again. At this time, the flat wire 6 is located in the working area of the pneumatic scissors 3b and the bundling opening 4a1.
[0051] Step 4: The continuous drive mechanism 4c works, that is, the piston rod 4c11 of the first cylinder 4c1 stretches inwards and drives the turntable 4c2 to move through the traction rope 4c3, thereby driving the top pressure block f of the aluminum nail machine 4a to perform the bundling action, and the flat wire 6 located in the bundling opening 4a1 is bundled into a bundle. After the aluminum nail machine 4a completes the bundling action, the turntable 4c2 and the traction rope 4c3 automatically reset and wait for the next action. At the same time, the automatic nail feeding mechanism 4b automatically feeds an aluminum nail 10 into the aluminum nail entrance 4a3.
[0052] Step 5: The pneumatic scissors 3 b work to complete the cutting of the flat wire 6 , and the cut flat wire bundle automatically falls into the finished product frame 5 through the hollow structure 1 b.
[0053] After the flat wire is tied and cut, the end of the flat wire 6 is still clamped by the pneumatic clamp 3a, and the above steps are repeated to perform continuous bundling and cutting.
[0054] Further, such as Figure 1 As shown, in order to ensure that the flat wire 6 is in a horizontal position during bundling and cutting, the first tensioning wheel 2b of the supporting system 2 is located above the second tensioning wheel 2c, and the second tensioning wheel 2c and the pneumatic chuck 3a are located at the same height.
[0055] Further, such as Figure 7 As shown, the pneumatic chuck 3a has two clamping blocks 3a1 that can approach each other. In order to ensure the clamping effect of the two clamping blocks 3a1 on the flat wire 6, a protrusion 3a2 is provided on the inner side of one of the clamping blocks 3a1, and a positioning groove 3a3 adapted to the protrusion 3a2 is provided on the inner side of the other clamping block 3a1.
[0056] Further, such as Figure 8 As shown, the finger cylinder 3d has two clamping pieces 3d1 that can approach each other, and the clamping pieces 3d1 are extended upward. In order to avoid movement interference, the upper ends of the clamping pieces 3d1 are offset toward the direction close to the aluminum nail machine 4a.
[0057] Further, such as Figure 4 As shown, in the continuous drive mechanism 4c, in order to make the movement of the turntable 4c2 more uniform, after the first cylinder 4c1 is assembled, the axis of the piston rod 4c11 is tangent to the turntable 4c2.
[0058] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.
Claims
1. An automatic bundling and cutting machine for filamentary materials, characterized in that: It comprises a support (1), on which a supporting system (2), a cutting system (3) and a bundling system (4) are installed; The cutting system (3) comprises a pneumatic chuck (3a), pneumatic scissors (3b), and a finger cylinder (3d) movably arranged on the bracket (1) via a driving component (3c); the bundling system (4) has an aluminum nail machine (4a) built in, and the aluminum nail machine (4a) has a bundling opening (4a1); The pneumatic chuck (3a), the pneumatic scissors (3b) and the bundling opening (4a1) are arranged in sequence in a direction away from the material support system (2); the finger cylinder (3d) can, under the action of the driving component (3c), pull the filamentary material to be cut from between the material support system (2) and the pneumatic chuck (3a) to the position of the pneumatic scissors (3b) and the bundling opening (4a1); and the pneumatic chuck (3a) can clamp the filamentary material when the pneumatic scissors (3b) and the aluminum nail machine (4a) perform an action; The bundling system (4) is provided with an automatic nail feeding mechanism (4b) and a continuous driving mechanism (4c), wherein the continuous driving mechanism (4c) can drive the aluminum nail machine (4a) to cyclically perform a bundling action, and the automatic nail feeding mechanism (4b) can feed aluminum nails into an aluminum nail inlet (4a3) of the aluminum nail machine (4a) before the aluminum nail machine (4a) performs each bundling action; The continuous driving mechanism (4c) comprises a first cylinder (4c1) fixed on a bracket (1), and a turntable (4c2) fixedly connected to a driving shaft (4a2) of an aluminum nail machine (4a), a traction rope (4c3) being wound around the circumference of the turntable (4c2), and the other end of the traction rope (4c3) being fixedly connected to a piston rod (4c11) of the first cylinder (4c1); The first bolts (4c4) are evenly distributed on the circumferential edge of the rotating disk (4c2), the first bolts (4c4) are vertically penetrated on the rotating disk (4c2), the first bolts (4c4) are connected with nuts (4c5) at positions corresponding to the upper and lower sides of the rotating disk (4c2), and the traction rope (4c3) is wound around the outer sides of each first bolt (4c4) along the circumference of the rotating disk (4c2); the middle part of the rotating disk (4c2) is provided with a connecting column (4c6) extending upwards, which is used to connect the driving shaft (4a2) of the aluminum nail machine (4a); The automatic nail feeding mechanism (4b) comprises a nail material conduit (4b1) and a nail pushing cylinder (4b2) which are coaxially arranged. The nail material conduit (4b1) is a hollow structure, and one end thereof which is away from the nail pushing cylinder (4b2) is connected to the aluminum nail inlet (4a3) of the aluminum nail machine (4a). A feeding push rod (4b4) is connected to the cylinder rod (4b3) of the nail pushing cylinder (4b2). The feeding push rod (4b4) is slidably arranged in the nail material conduit (4b1). A feeding hole (4b5) is arranged on the upper side of the nail material conduit (4b1), and a nail material bin (4b6) is fixedly installed at a position corresponding to the feeding hole (4b5). The driving assembly (3c) comprises a support plate (3c1) slidably mounted along the length direction of the bracket (1), a moving cylinder (3c2) driving the support plate (3c1) to slide, and a lifting cylinder (3c3) fixedly mounted on the support plate (3c1), wherein a connecting plate (3c4) is fixedly mounted on the piston rod of the lifting cylinder (3c3), and the finger cylinder (3d) is fixed on the connecting plate (3c4).
2. The automatic filamentary material bundling and cutting machine according to claim 1, characterized in that: The material support system (2) comprises a cluster tube (2a), a first tension wheel (2b) and a second tension wheel (2c) which are arranged in sequence along the conveying direction of the filamentary material; the first tension wheel (2b) and the second tension wheel (2c) are rotatably mounted on the bracket (1).
3. The automatic filamentary material bundling and cutting machine according to claim 2, characterized in that: The first tensioning wheel (2b) is located above the second tensioning wheel (2c), and the second tensioning wheel (2c) and the pneumatic chuck (3a) are located at the same height.
4. The automatic filamentary material bundling and cutting machine according to claim 1, characterized in that: The pneumatic chuck (3a) has two clamping blocks (3a1) that can approach each other, wherein a protrusion (3a2) is provided on the inner side of one of the clamping blocks (3a1), and a positioning groove (3a3) adapted to the protrusion (3a2) is provided on the inner side of the other clamping block (3a1).
5. The automatic filamentary material bundling and cutting machine according to claim 1, characterized in that: Two groups of guide columns (1a) are installed on the bracket (1); the support plate (3c1) is slidably mounted on the two groups of guide columns (1a); the area between the two groups of guide columns (1a) of the bracket (1) is a hollow structure (1b); the pneumatic chuck (3a), the pneumatic scissors (3b) and the bundling opening (4a1) are all located above the hollow structure (1b); and a finished product frame (5) is provided below the hollow structure (1b).
Citation Information
Patent Citations
Continuous bundling equipment for filamentous materials
CN213473625U