CN117183383A - Method and apparatus for manufacturing soft-head anesthetic tube - Google Patents
Method and apparatus for manufacturing soft-head anesthetic tube Download PDFInfo
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- CN117183383A CN117183383A CN202311113031.3A CN202311113031A CN117183383A CN 117183383 A CN117183383 A CN 117183383A CN 202311113031 A CN202311113031 A CN 202311113031A CN 117183383 A CN117183383 A CN 117183383A
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- hot
- rubber tube
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- melting
- flattening
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- 230000003444 anaesthetic effect Effects 0.000 title claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000002844 melting Methods 0.000 claims abstract description 35
- 230000008018 melting Effects 0.000 claims abstract description 19
- 239000012943 hotmelt Substances 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 238000003466 welding Methods 0.000 claims abstract description 8
- 230000007246 mechanism Effects 0.000 claims description 44
- 206010002091 Anaesthesia Diseases 0.000 claims description 11
- 230000037005 anaesthesia Effects 0.000 claims description 11
- 238000000465 moulding Methods 0.000 claims description 11
- 239000004033 plastic Substances 0.000 claims description 8
- 238000009423 ventilation Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims 2
- 230000008569 process Effects 0.000 abstract description 6
- 238000010309 melting process Methods 0.000 abstract description 3
- 230000004927 fusion Effects 0.000 description 4
- 210000001951 dura mater Anatomy 0.000 description 3
- 208000007536 Thrombosis Diseases 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 210000004204 blood vessel Anatomy 0.000 description 2
- 230000000747 cardiac effect Effects 0.000 description 2
- 210000001032 spinal nerve Anatomy 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 206010033799 Paralysis Diseases 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000036407 pain Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 210000000273 spinal nerve root Anatomy 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention discloses a method and a device for manufacturing a soft-head anesthetic tube. Firstly, inserting the front end of a harder first rubber tube into a flattening die, performing hot melting flattening, forming a conduit body by the first rubber tube, and forming a flattening section at the front end of the conduit body; then, the softer second rubber tube is in tight fit with the flattening section in an inserting manner; then, carrying out hot melt welding, and forming a flexible section on the front end of the catheter body by the second rubber tube; finally, a liquid outlet hole is formed in the side wall of the catheter body, which is close to one end of the flexible section. The invention adopts a twice hot melting process, the flexible section is welded after the front end of the catheter body is spliced, the process is mature, the operation is convenient, and the production cost is low; and the welding area between the flexible section and the flattening section of the manufactured soft-head anesthetic tube is large, the flexible section is firmly connected, and the soft-head anesthetic tube is not easy to loose and fall off, and has the advantages of simple and reliable structure.
Description
Technical Field
The invention relates to the technical field of manufacturing equipment of medical equipment, in particular to a manufacturing method and a device of a soft-head anesthetic catheter.
Background
During anesthesia, medical staff punctures the epidural needle into a patient, then withdraws a nib type anesthetic needle inserted in the epidural needle, then guides the epidural catheter into the patient through the epidural needle, finally, the medical staff injects anesthetic into the epidural space through the epidural catheter to block spinal nerve roots, so that the dominant region is temporarily paralyzed, pain is eliminated, and muscles are relaxed, and the operation needs are met.
The existing epidural catheter is a rubber tube with certain toughness and rigidity, one end of the rubber tube is a blind end, and at least one liquid outlet hole is arranged at the rear position of the blind end and used for guiding an externally injected anesthetic into the epidural space of a patient. However, since the epidural space blocking anesthesia is not observable in the patient during the implementation process, the operation can only be performed through the experience of medical staff, but the epidural catheter has relatively high hardness, which easily causes the end of the epidural catheter to puncture the dura mater or the blood vessel during the process of introducing the epidural catheter into the epidural space, so that the liquid outlet hole of the epidural catheter is blocked by the coagulated hard mass or blood clot, and even the condition that the epidural catheter is propped against spinal nerves may occur, thereby causing anesthesia failure or serious medical accidents.
Patent document CN210785900U discloses an epidural catheter for anesthesia, which is provided with a flexible part communicated with the end part of a rubber tube, and the flexible part can be timely bent when receiving a large axial thrust applied by alignment of the rubber tube and resistance applied by the dura mater, so that the functions of preventing the rubber tube from puncturing the dura mater, blood vessels and even puncturing the internal spinal nerves and preventing blood clots from blocking a liquid outlet hole of the epidural catheter from being blocked are achieved, but the flexible part of the structure is formed by butt welding with the end part of the rubber tube, so that the connection is not firm enough, and the flexible part has a falling risk.
Patent document CN112516434B discloses an anesthetic tube, wherein a softening part is coaxially arranged at the front end of a tube body, and the softening part is connected with the tube body in a reinforced manner by a metal wire. Patent document CN101845290a discloses a head elastic softening liquid of a cardiac anesthesia catheter and a preparation and use method thereof, wherein the head of the cardiac anesthesia catheter which needs to be softened is immersed in the softening liquid to obtain the head elastic softening anesthesia catheter. The softening part at the front end of the two anesthesia catheters is not easy to fall off, but the structure of the softening part is complex, the chemical treatment process of the softening part is troublesome, and the cost is high.
Disclosure of Invention
In order to realize simple and efficient processing of the soft-head anesthetic tube, the invention provides a manufacturing method and a device of the soft-head anesthetic tube.
The technical scheme adopted by the invention is as follows: a manufacturing method of a soft-head anesthetic catheter comprises the following steps:
step 1, inserting the front end of a rubber tube with plastic Mohs hardness M60-M80 into a flattening die, and performing hot melting flattening, wherein the rubber tube forms a conduit body, and the front end of the conduit body is provided with a flattening section with the length of 2-3 mm;
step 2, a second rubber tube with plastic Mohs hardness M20-M40 and length 5-8 mm is in plug-in tight fit with the flattening section;
step 3, carrying out hot melt welding, wherein the second rubber tube forms a flexible section at the front end of the catheter body;
and 4, forming a liquid outlet hole on the side wall of the catheter body, which is close to one end of the flexible section.
The manufacturing device of the soft-head anesthetic catheter comprises two hot-melting machines, wherein the hot-melting machines comprise a workbench, a hot-melting mechanism, a clamping mechanism and a feeding mechanism are arranged on the workbench, a hot-melting die is arranged in the hot-melting mechanism, the clamping mechanism is used for clamping a rubber tube, and the front end of the rubber tube is driven by the feeding mechanism to be fed into the hot-melting die; one of the hot melt mold is used for forming a flattening section at the front end of the first rubber tube, and the other hot melt mold is used for connecting the second rubber tube with the flattening section in a hot melt manner so as to form a flexible section.
Preferably, the hot melting mold comprises a molding cavity, wherein a threaded connection part is arranged on the peripheral wall of the molding cavity, and the threaded connection part is used for being fixedly installed with the hot melting mechanism.
Preferably, a positioning disc is further arranged in the direction of the hot melting mold facing the clamping mechanism.
Preferably, the feeding end of the forming cavity is provided with a smooth transition bell mouth.
Preferably, the blind end of the forming cavity is provided with ventilation pores.
Preferably, the clamping mechanism is a pneumatic clamp, and the feeding mechanism is a pneumatic driving cylinder for driving the clamping mechanism to horizontally move.
Preferably, a clamping notch matched with the diameter of the rubber tube I is formed in the inner side of a jaw of the clamping mechanism.
The invention has the following beneficial effects: the invention adopts a twice hot melting process, the flexible section is welded after the front end of the catheter body is spliced, the process is mature, the operation is convenient, and the production cost is low; and the welding area between the flexible section and the flattening section of the manufactured soft-head anesthetic tube is large, the flexible section is firmly connected, and the soft-head anesthetic tube is not easy to loose and fall off, and has the advantages of simple and reliable structure.
Drawings
FIG. 1 is a flow chart illustrating the manufacture of an anesthetic tube according to an embodiment of the present invention.
Fig. 2 is a schematic external view of the apparatus according to the embodiment of the present invention.
FIG. 3 is a schematic cross-sectional view of a first heat fusible pattern tool in an embodiment of the invention.
Fig. 4 is a schematic cross-sectional view of a second hot melt mold in an embodiment of the invention.
Fig. 5 is an enlarged schematic view of the clamping mechanism according to an embodiment of the invention.
A rubber hose 01; a second rubber tube 02;
a catheter body 1; a flexible section 2; a liquid outlet hole 3; flattening the section 4;
a work table 5; a hot melting mechanism 6; a clamping mechanism 7 for clamping the notch 701; a feeding mechanism 8; a heat-fusible pattern 9a, a heat-fusible pattern 9b, a molding cavity 901, a screw connection portion 902, a positioning plate 903, a flare 904, and ventilation holes 905.
Detailed Description
The invention will be further described with reference to examples and drawings.
In an embodiment, as shown in fig. 1, a method for manufacturing a soft-head anesthetic tube includes the following steps:
step 1, inserting the front end of a rubber tube 01 with plastic Mohs hardness M60-M80 into a flattening die, performing hot melting flattening, forming a catheter body 1 by the rubber tube 01, and flattening a section 4 with the length of 2-3 mm at the front end of the catheter body 1;
step 2, the second rubber tube 02 with the plastic Mohs hardness M20-M40 and the length of 5-8 mm is in plug-in tight fit with the flattening section 4;
step 3, carrying out hot melt welding, wherein a second rubber tube 02 forms a flexible section 2 at the front end of the catheter body 1;
and 4, forming a liquid outlet hole 3 on the side wall of the catheter body 1, which is close to one end of the flexible section 2.
The first rubber tube 01 and the second rubber tube 02 of the embodiment are made of plastic materials such as nylon and PVC, and have certain rigidity and toughness besides certain hardness, and the inner diameter and the outer diameter of the first rubber tube 01 are consistent with those of the second rubber tube 02. The flexible section 2 is welded after the front end of the catheter body 1 is spliced by adopting a twice hot melting process, the process is mature, the operation is convenient, and the production cost is low; and the welding area between the flexible section 2 and the flattening section 4 of the manufactured soft-head anesthetic tube is large, the flexible section 2 is firmly connected, and the soft-head anesthetic tube is not easy to loose and fall off, and has the advantages of simple and reliable structure.
In an embodiment, as shown in fig. 2 to 5, a manufacturing apparatus for a soft-head anesthetic tube based on the above manufacturing method includes two hot-melting machines with substantially the same structure. The hot melting machine comprises a workbench 5, a hot melting mechanism 6, a clamping mechanism 7 and a feeding mechanism 8 are arranged on the workbench 5, hot melting tools 9a and 9b are arranged in the hot melting mechanism 6, the clamping mechanism 7 is used for clamping a rubber tube I, and the front end of the rubber tube I is fed into the hot melting tools under the drive of the feeding mechanism 8. One hot melt mold 9a is used for forming a flattening section 4 at the front end of the first rubber tube 01, and the other hot melt mold 9b is used for connecting the second rubber tube 02 with the flattening section 4 in a hot melt manner to form a flexible section 2. The device of the embodiment has simpler structure, can realize flattening of the catheter body 1 and hot melting of the flexible section 2 by using two hot melting machines with different pairs of hot melting mold 9a and 9b, and has the advantages of convenient and reliable operation.
In the embodiment, as shown in fig. 3 and 4, each of the two heat fusion tools 9a and 9b includes a molding cavity 901, and a threaded connection portion 902 is provided on the outer peripheral wall of the molding cavity 901, and the threaded connection portion 902 is used for being fixed to the heat fusion mechanism 6. The threaded connection portion 902 adopts imperial UNF fine threads, which is more beneficial to self-locking of threads, good in anti-loosening performance and small in pitch, and is convenient for fine adjustment of axial positions. The heat fusion mold 9a,9b uses the pre-hardened plastic mold NAK80, which has a hardness of 41HRC, has good machinability, does not require heat treatment, has good engraving and polishing properties, and is excellent in wear resistance, and is suitable for processing into the mold of this embodiment.
In the embodiment, as shown in fig. 3 and 4, the heat fusion dies 9a,9b are further provided with a positioning plate 903 in a direction toward the holding mechanism 7. After the positioning disk 903 is matched with the hot melting mechanism 6, the position of the center line of the molding cavity 901 is determined through the scale to align the clamping mechanism 7 and the feeding mechanism 8, so that the consistency of hot melting molding of the front ends of the catheter body 1 and the flexible section 2 is ensured.
In the embodiment, as shown in fig. 3 and 4, the feeding end of the forming cavity 901 is provided with a smoothly transition flare 904. The horn mouth 904 facilitates the alignment of the catheter body 1 and the flexible section 2, thereby facilitating the feeding of the feeding mechanism 8 and avoiding the bending phenomenon of the catheter body 1 in the forming cavity 901.
In the embodiment, as shown in fig. 3 and 4, the blind end of the molding cavity 901 is provided with ventilation holes 905. The ventilation fine holes 905 are used for exhausting, so that the hot melt molding of the front ends of the catheter body 1 and the flexible section 2 can be effectively ensured.
In the embodiment, as shown in fig. 2, the clamping mechanism 7 is a pneumatic clamp, and the feeding mechanism 8 is a pneumatic driving cylinder for driving the clamping mechanism 7 to move horizontally. The pneumatic device has the advantages of cleanness and convenient automatic control, and is suitable for being applied to the device.
In the embodiment, as shown in fig. 5, a clamping notch 701 matched with the diameter of the rubber tube 01 is arranged on the inner side of the jaw of the clamping mechanism 7. The two clamping notches 701 can be used for feeding the rubber hose 01 forwards after clamping, but cannot be used for clamping too tightly, so that the rubber hose 01 is prevented from bending and deforming, and smooth hot melting is ensured.
In the embodiment, the number of the liquid outlet holes 3 can be generally 1-6, and the liquid outlet holes are uniformly distributed on the pipe wall at the front end of the catheter body 1, and are generally completed by adopting laser drilling equipment.
It is apparent that the above examples of the present invention are merely illustrative of the present invention and are not limiting of the embodiments of the present invention. Other obvious variations or modifications which are extended by the spirit of the present invention are within the scope of the present invention.
Claims (8)
1. A method for manufacturing a soft-head anesthetic tube, comprising the steps of:
step 1, inserting the front end of a rubber tube (01) with plastic Mohs hardness M60-M80 into a flattening die, and performing hot melting flattening, wherein the rubber tube (01) forms a catheter body (1), and a flattening section (4) with the length of 2-3 mm is formed at the front end of the catheter body (1);
step 2, a second rubber tube (02) with plastic Mohs hardness M20-M40 and length 5-8 mm is in plug-in tight fit with the flattening section (4);
step 3, performing hot melt welding, wherein the second rubber tube (02) forms a flexible section (2) at the front end of the catheter body (1);
and 4, forming a liquid outlet hole (3) on the side wall of the catheter body (1) close to one end of the flexible section (2).
2. The manufacturing device of the soft-head anesthetic catheter is characterized by comprising two hot-melting machines, wherein each hot-melting machine comprises a workbench (5), a hot-melting mechanism (6), a clamping mechanism (7) and a feeding mechanism (8) are arranged on each workbench (5), hot-melting dies (9 a,9 b) are arranged in each hot-melting mechanism (6), each clamping mechanism (7) is used for clamping a rubber tube, and the front end of the rubber tube is driven by each feeding mechanism (8) to be fed into each hot-melting die; one hot-melting mould (9 a,9 b) is used for forming a flattening section (4) at the front end of the first rubber tube (01), and the other hot-melting mould (9 a,9 b) is used for connecting the second rubber tube (02) with the flattening section (4) in a hot-melting way to form a flexible section (2).
3. The apparatus for manufacturing a soft-tipped anesthesia catheter according to claim 2, characterized in that the hot-melt mold (9 a,9 b) comprises a molding cavity (901), a threaded connection portion (902) is provided at the outer peripheral wall of the molding cavity (901), and the threaded connection portion (902) is used for being mounted and fixed with the hot-melt mechanism (6).
4. A device for manufacturing a soft-tipped anesthesia catheter according to claim 3, characterized in that the hot melt moulds (9 a,9 b) are further provided with a positioning disc (903) in the direction towards the clamping mechanism (7).
5. A device for manufacturing a soft-tipped anesthesia catheter according to claim 3, characterized in that the feeding end of the shaping cavity (901) is provided with a smoothly transition flare (904).
6. A device for manufacturing a soft-tipped anesthetic tube according to claim 3, characterized in that the blind end of the shaping cavity (901) is provided with ventilation holes (905).
7. The device for manufacturing the soft-head anesthetic tube according to claim 2, wherein the clamping mechanism (7) is a pneumatic clamp, and the feeding mechanism (8) is a pneumatic driving cylinder for driving the clamping mechanism (7) to horizontally move.
8. The device for manufacturing the soft-head anesthetic tube according to claim 7, wherein a clamping notch (701) matched with the diameter of the rubber tube (01) is arranged on the inner side of a jaw of the clamping mechanism (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311113031.3A CN117183383A (en) | 2023-08-31 | 2023-08-31 | Method and apparatus for manufacturing soft-head anesthetic tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311113031.3A CN117183383A (en) | 2023-08-31 | 2023-08-31 | Method and apparatus for manufacturing soft-head anesthetic tube |
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| Publication Number | Publication Date |
|---|---|
| CN117183383A true CN117183383A (en) | 2023-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311113031.3A Pending CN117183383A (en) | 2023-08-31 | 2023-08-31 | Method and apparatus for manufacturing soft-head anesthetic tube |
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| CN (1) | CN117183383A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4292270A (en) * | 1979-06-22 | 1981-09-29 | Baxter Travenol Laboratories, Inc. | Method and apparatus for making coude catheters |
| CN105188814A (en) * | 2013-03-07 | 2015-12-23 | 泰尔茂株式会社 | Method for producing needle-equipped outer tube, and needle-equipped outer tube |
| CN210785900U (en) * | 2019-08-13 | 2020-06-19 | 浙江润强医疗器械股份有限公司 | Epidural catheter for anesthesia |
| CN211390186U (en) * | 2019-10-28 | 2020-09-01 | 李嘉富 | Hot-melt butt joint device for PPR (polypropylene random) pipes |
| CN213108280U (en) * | 2020-08-14 | 2021-05-04 | 中工恒盛科技有限公司 | Hot welding device for plastic pipes |
-
2023
- 2023-08-31 CN CN202311113031.3A patent/CN117183383A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4292270A (en) * | 1979-06-22 | 1981-09-29 | Baxter Travenol Laboratories, Inc. | Method and apparatus for making coude catheters |
| CN105188814A (en) * | 2013-03-07 | 2015-12-23 | 泰尔茂株式会社 | Method for producing needle-equipped outer tube, and needle-equipped outer tube |
| CN210785900U (en) * | 2019-08-13 | 2020-06-19 | 浙江润强医疗器械股份有限公司 | Epidural catheter for anesthesia |
| CN211390186U (en) * | 2019-10-28 | 2020-09-01 | 李嘉富 | Hot-melt butt joint device for PPR (polypropylene random) pipes |
| CN213108280U (en) * | 2020-08-14 | 2021-05-04 | 中工恒盛科技有限公司 | Hot welding device for plastic pipes |
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