Chemical fiber thread feeding and cutting mechanism for production of nerve operation pads

Abstract

The utility model discloses a chemical fiber thread feeding and cutting mechanism for neurosurgery pad production, which comprises a chemical fiber thread support, a chemical fiber thread cylinder arranged at the top of the chemical fiber thread support, two material guide cylinders arranged at the bottom of the chemical fiber thread support, and two horizontally arranged horizontal positioning wheels and a feeding roller arranged between the two material guide cylinders. A chemical fiber thread output from the chemical fiber thread cylinder sequentially penetrates through one material guide cylinder, the two horizontal positioning wheels, the feeding roller and the other material guide cylinder and then extends into the chemical fiber thread cutting mechanism; the chemical fiber thread feeding mechanism further comprises a negative pressure feeding frame, and the chemical fiber threads penetrating out of the material guide cylinder are fed through the negative pressure feeding frame. By integrating the functions of negative pressure guiding, dynamic clamping and intelligent sensing, the purposes of micron-grade feeding precision, zero-damage cutting and full-process automatic control are achieved.

Description

Technical Field

[0001] This utility model relates to the field of medical product processing technology, specifically a chemical fiber feeding and cutting mechanism for the production of nerve surgical pads. Background Technology

[0002] As a high-end medical consumable, the precise arrangement and cutting quality of the internal synthetic fiber threads in neurosurgical pads directly affect the product's tear resistance and postoperative anti-adhesion effect. Synthetic fiber threads (such as polypropylene and polyester fibers) are widely used due to their lightweight, high strength, and biocompatibility; however, their low density and high flexibility also present significant technical challenges to the feeding and cutting processes. Current synthetic fiber thread feeding and cutting technologies mainly face the following bottlenecks:

[0003] Traditional mechanical roller feeding relies on the friction between the yarn and the roller. The smooth surface of synthetic fibers is prone to electrostatic attraction, often leading to slippage or tension fluctuations (±15% or more). Especially at high-speed feeding (>20m / min), the yarn can easily detach from the guide cylinder or drift laterally, causing misalignment at subsequent stations. Although there are improved solutions using auxiliary pressure rollers, rigid contact can easily damage the yarn surface, affecting the integrity of the fiber structure.

[0004] When cutting synthetic fibers, conventional vertical cutting blades often result in the fibers retracting or twisting due to a lack of effective fixation, leading to skewed cuts and a burr rate exceeding 5%, failing to meet the edge smoothness requirements of surgical pads (burr height ≤ 50μm). Some equipment attempts have attempted to add pneumatic grippers, but the gripping action and cutting sequence are difficult to precisely match, and the fiber tip can spring back 1-3mm after the gripper is released, severely affecting the gripping accuracy of the rotary table at the workstation. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a chemical fiber feeding and cutting mechanism for the production of nerve surgical pads, which integrates negative pressure guidance, dynamic clamping and intelligent sensing functions to achieve micron-level feeding accuracy, non-destructive cutting and fully automated control of the entire process.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a chemical fiber feeding and cutting mechanism for the production of nerve surgical pads, including a chemical fiber support, a chemical fiber spool at the top of the chemical fiber support, two guide cylinders at the bottom of the chemical fiber support, two horizontally arranged positioning wheels and a feeding roller between the two guide cylinders, and the chemical fiber output from the chemical fiber spool passes through one of the guide cylinders, the two horizontal positioning wheels, the feeding roller and the other guide cylinder in sequence before extending into the chemical fiber cutting mechanism;

[0007] The chemical fiber feeding mechanism also includes a negative pressure feeding frame, through which the chemical fiber thread passing through the guide cylinder is fed.

[0008] In a preferred embodiment, the negative pressure feeding rack passes through the chemical fiber cutting mechanism. The chemical fiber cutting mechanism includes a chemical fiber cutting mechanism mounting base, on which a cylinder with a chemical fiber cutting blade and two vacuum guide tubes are provided. The two vacuum guide tubes are connected end to end and form a gap. A ring-shaped sealing element is installed at the gap. A first negative pressure pipe is connected to the ring-shaped sealing element. One end of the negative pressure feeding rack extends to the station rotary table and is provided with a second negative pressure pipe. Both the first negative pressure pipe and the second negative pressure pipe are connected to the negative pressure equipment.

[0009] In a preferred embodiment, the fiber wire cutter is provided with fiber wire clamps on the fiber wire support near the feed cylinder.

[0010] In a preferred embodiment, a photoelectric sensor is provided on the negative pressure feeder in the direction of the second negative pressure pipe near the chemical fiber wire cutting mechanism.

[0011] In a preferred embodiment, the mounting base of the chemical fiber wire cutting mechanism is provided with a vacuum guide tube moving track. The vacuum guide tube is fixed to the slider by a connecting rod. The slider is set on the vacuum guide tube moving track and can drive the vacuum guide tube to move horizontally.

[0012] In a preferred embodiment, one of the two vacuum feed tubes has a tapered opening on its outer wall at one end, and the other has a tapered opening on its inner wall at the other end. The tapered portions of the two vacuum feed tubes are inserted together to form a gap.

[0013] In a preferred embodiment, the fiber feeding mechanism is a pusher cylinder.

[0014] The fiber feeding and cutting mechanism for producing nerve surgical pads provided by this utility model, by adopting the above-described structure and method, has the following beneficial effects:

[0015] (1) After the chemical fiber line passes through the guide tube, it is pulled by the negative pressure adsorption force of the negative pressure feeding frame throughout the process, avoiding the slippage problem caused by the friction of traditional rollers. Combined with the continuous negative pressure guidance of two vacuum guide tubes, the chemical fiber line is suspended and conveyed, and there is no mechanical contact damage on the surface, which can effectively control the tension fluctuation of the conveying of the chemical fiber line.

[0016] (2) Before cutting, the chemical fiber clamp holds the fiber body, and the cutting blade cuts down close to the end of the vacuum feed tube under the drive of the cylinder, which effectively suppresses the retraction of the fiber body, reduces the burr rate of the cut, and ensures the flatness of the end face. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 This is a schematic diagram of the chemical fiber feeding mechanism of this utility model.

[0019] Figure 2This is a schematic diagram of the vacuum feed tube structure of this utility model.

[0020] In the diagram: 1. Fiber filament support; 2. Fiber filament spool; 3. Guide tube; 4. Horizontal positioning wheel; 5. Feeding roller; 6. Negative pressure feeding rack; 7. Fiber filament cutting mechanism; 8. Fiber filament cutting mechanism mounting base; 9. Fiber filament cutting blade; 10. Fiber filament gripper; 11. Vacuum guide tube; 12. First negative pressure tube; 13. Second negative pressure tube; 14. Vacuum guide tube moving track; 15. Ring seal; 16. Photoelectric sensor. Detailed Implementation

[0021] like Figure 1-2 In a neurosurgical pad production chemical fiber feeding and cutting mechanism, there is a chemical fiber support 1, a chemical fiber spool 2 is provided at the top of the chemical fiber support 1, and two guide cylinders 3 are provided at the bottom of the chemical fiber support 1. Two horizontally arranged horizontal positioning wheels 4 and a feeding roller 5 are provided between the two guide cylinders 3. The chemical fiber output from the chemical fiber spool 2 passes through one of the guide cylinders 3, the two horizontal positioning wheels 4, the feeding roller 5 and the other guide cylinder 3 in sequence and then extends into the chemical fiber cutting mechanism 7.

[0022] The chemical fiber feeding mechanism 6 also includes a negative pressure feeding frame 6, through which the chemical fiber thread passing through the guide cylinder 3 is fed by the negative pressure feeding frame 6.

[0023] In a preferred embodiment, the negative pressure feeding rack 6 passes through the chemical fiber cutting mechanism 7. The chemical fiber cutting mechanism 7 includes a chemical fiber cutting mechanism mounting base 8, on which a cylinder with a chemical fiber cutting blade 9 and two vacuum guide tubes 11 are provided. The two vacuum guide tubes 11 are connected end to end and form a gap. A ring-shaped sealing element 15 is installed at the gap. A first negative pressure tube 12 is connected to the ring-shaped sealing element 15. One end of the negative pressure feeding rack 6 extends to the station rotary table 1 and is provided with a second negative pressure tube 13. Both the first negative pressure tube 12 and the second negative pressure tube 13 are connected to the negative pressure equipment.

[0024] In a preferred embodiment, the fiber wire cutting blade 9 is provided with a fiber wire clamp 10 on the fiber wire support 1 in the direction close to the guide cylinder 3.

[0025] In a preferred embodiment, a photoelectric sensor 16 is provided on the negative pressure feeder 6 in the direction of the second negative pressure pipe 13 near the chemical fiber wire cutting mechanism 7.

[0026] In a preferred embodiment, the chemical fiber wire cutting mechanism mounting base 8 is provided with a vacuum guide tube moving track 14, the vacuum guide tube 11 is fixed to the slider by a connecting rod, the slider is set on the vacuum guide tube moving track 14 and can drive the vacuum guide tube 11 to move horizontally.

[0027] In a preferred embodiment, one of the two vacuum feed tubes 11 has a tapered opening on its outer wall at one end, and the other has a tapered opening on its inner wall at the other end. The tapered portions of the two vacuum feed tubes 11 are inserted together to form a gap.

[0028] In a preferred embodiment, the chemical fiber feeding mechanism 6 is a pusher cylinder.

[0029] The present invention discloses a chemical fiber feeding and cutting mechanism for the production of nerve surgical pads, which, during operation:

[0030] When the negative pressure equipment is started, the first negative pressure pipe 12 and the second negative pressure pipe 13 apply an adsorption force of -0.06MPa to the vacuum feed pipe 11 and the negative pressure feeder 6, respectively.

[0031] The chemical fiber line is drawn out from the spool 2, passes sequentially through the left guide spool 3, the horizontal positioning wheel 4, the feeding roller 5, and the right guide spool 3, and enters the negative pressure feeding frame 6. The negative pressure adsorption force pulls the chemical fiber line to suspend and convey it, with a feeding speed of 20m / min.

[0032] Photoelectric positioning:

[0033] The photoelectric sensor 16 detects the position of the end of the chemical fiber thread with a positioning accuracy of ±0.03mm and triggers a cutting signal.

[0034] The chemical fiber thread clamps close and hold the thread, with the clamping point 3mm away from the preset cut.

[0035] The cutting blade 9 cuts downwards under the drive of the cylinder. After the cutting is completed, the vacuum guide tube 11 moves horizontally along the moving track 14 to reset, releasing the chemical fiber line to the station rotary table, and at the same time adsorbing the broken part of the chemical fiber line.

[0036] The cutting blade 9 and the gripper 10 reset synchronously. The negative pressure feeding rack 6 moves to drive the end of the chemical fiber line (located in the vacuum feed tube 11) to push the next section of chemical fiber line into the work station. Each cycle takes 1.2 seconds.

[0037] The negative pressure feeding system uses an SMC ZH series vacuum generator (flow rate 60L / min) with a negative pressure value of -80kPa.

[0038] The chemical fiber wire cutting knife uses a diamond-coated blade (30° cutting angle) and is driven by a cylinder (0.1s response time).

[0039] The vacuum feed tube has an inner diameter of 3mm, is made of PTFE, and has a length of 500mm.

Claims

1. A feeding and cutting mechanism for chemical fiber threads used in the production of nerve surgical pads, characterized in that: The device includes a fiber filament support (1), a fiber filament spool (2) on the top of the fiber filament support (1), two guide cylinders (3) at the bottom of the fiber filament support (1), two horizontally positioned wheels (4) and a feeding roller (5) between the two guide cylinders (3), and the fiber filament output from the fiber filament spool (2) passes through one of the guide cylinders (3), the two horizontally positioned wheels (4), the feeding roller (5) and the other guide cylinder (3) in sequence before extending into the fiber filament cutting mechanism (7); The fiber support (1) is provided with a fiber feeding mechanism at one end. The fiber feeding mechanism includes a negative pressure feeding frame (6). The fiber that passes through the guide cylinder (3) is fed by the negative pressure feeding frame (6). The negative pressure feeding rack (6) is set through the chemical fiber cutting mechanism (7). The chemical fiber cutting mechanism (7) includes a chemical fiber cutting mechanism mounting base (8). The chemical fiber cutting mechanism mounting base (8) is provided with a cylinder body with a chemical fiber cutting blade (9) and two vacuum guide tubes (11). The two vacuum guide tubes (11) are connected end to end and form a gap. A ring seal (15) is installed at the gap. A first negative pressure tube (12) is connected to the ring seal (15). One end of the negative pressure feeding rack (6) extends to the station rotary table and is provided with a second negative pressure tube (13). Both the first negative pressure tube (12) and the second negative pressure tube (13) are connected to the negative pressure equipment.

2. The chemical fiber feeding and cutting mechanism for producing a nerve surgical pad according to claim 1, characterized in that: The fiber cutting blade (9) is provided with a fiber clamp (10) on the fiber support (1) in the direction of the guide cylinder (3).

3. The chemical fiber feeding and cutting mechanism for producing a nerve surgical pad according to claim 1, characterized in that: A photoelectric sensor (16) is provided on the negative pressure feeder (6) in the direction of the second negative pressure tube (13) near the chemical fiber wire cutting mechanism (7).

4. The chemical fiber feeding and cutting mechanism for producing a nerve surgical pad according to claim 1, characterized in that: The fiber wire cutting mechanism mounting base (8) is provided with a vacuum guide tube moving track (14). The vacuum guide tube (11) is fixed to the slider by a connecting rod. The slider is set on the vacuum guide tube moving track (14) and can drive the vacuum guide tube (11) to move horizontally.

5. The chemical fiber feeding and cutting mechanism for producing a nerve surgical pad according to claim 1, characterized in that: Of the two vacuum feed tubes (11), one has a tapered opening on the outer wall of its end and the other has a tapered opening on the inner wall of its end. The tapered portions of the two vacuum feed tubes (11) are inserted together to form a gap.

6. The chemical fiber feeding and cutting mechanism for producing a nerve surgical pad according to claim 1, characterized in that: The feeding mechanism for the chemical fiber line is a push cylinder.

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