CN106903735B - Method for forming tip of all-silica gel hemodialysis catheter - Google Patents
Method for forming tip of all-silica gel hemodialysis catheter Download PDFInfo
- Publication number
- CN106903735B CN106903735B CN201610100496.9A CN201610100496A CN106903735B CN 106903735 B CN106903735 B CN 106903735B CN 201610100496 A CN201610100496 A CN 201610100496A CN 106903735 B CN106903735 B CN 106903735B
- Authority
- CN
- China
- Prior art keywords
- silica gel
- liquid nitrogen
- guide pipe
- closed container
- hardened
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000741 silica gel Substances 0.000 title claims abstract description 67
- 229910002027 silica gel Inorganic materials 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000001631 haemodialysis Methods 0.000 title claims abstract description 11
- 230000000322 hemodialysis Effects 0.000 title claims abstract description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 82
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000007788 liquid Substances 0.000 claims abstract description 42
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 41
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 230000007306 turnover Effects 0.000 claims abstract description 5
- 208000034189 Sclerosis Diseases 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 14
- 229920002379 silicone rubber Polymers 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 4
- 238000007710 freezing Methods 0.000 abstract description 4
- 230000008014 freezing Effects 0.000 abstract description 4
- 229960001866 silicon dioxide Drugs 0.000 description 44
- 239000004945 silicone rubber Substances 0.000 description 8
- 238000000605 extraction Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000000499 gel Substances 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D5/08—Means for actuating the cutting member to effect the cut
- B26D5/086—Electric, magnetic, piezoelectric, electro-magnetic means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/08—Means for treating work or cutting member to facilitate cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
- B26D7/2628—Means for adjusting the position of the cutting member
Abstract
The invention provides a method for forming the tip of a full-silica gel hemodialysis catheter, which comprises the following steps of placing the silica gel catheter in a closed container, wherein the closed container is provided with a liquid nitrogen placing valve, a release valve for releasing liquid nitrogen and a turnover door for the silicon rubber catheter to enter and exit; filling liquid nitrogen into the closed container, so that the silica gel guide pipe is immersed in the liquid nitrogen for at least one minute, and hardening the silica gel guide pipe by cooling the liquid nitrogen; and step three, rapidly releasing the liquid nitrogen in the closed container, taking the hardened silica gel guide pipe out of the closed container, and immediately processing the hardened silica gel guide pipe into the silica gel guide pipe with the tip through a chamfering machine. The low-temperature freezing effect of liquid nitrogen is utilized to enable the temperature of the silica gel material to reach-100 ℃, the silica gel material is hardened, the hardened silica gel pipe is quickly taken out to be machined, the appearance and the size of the machined silica gel pipe are greatly improved, and the machined surface is smooth and the size is stable.
Description
Technical Field
The invention relates to a method for forming a tip of an all-silica gel hemodialysis catheter.
Background
The silicone rubber medical catheter has good tensile property, and the tube body, particularly a thinner tube body, is soft, easy to bend and rich in elasticity. These features allow the silicone catheter to bend and deform during insertion. The catheter mainly applied comprises a catheter, a drainage tube, a double-cavity piezometric tube, a hemodialysis tube and the like. However, when some tapered silica gel products are manufactured, such as catheters for hemodialysis, the tapered silica gel products need to be manufactured at the front end of the catheter, so that the catheter is easier to be placed into a human body, but due to the characteristics of the silicone rubber, the characteristics of softness, insolubility and insolubility exist, and the insolubility refers to that a solvent cannot disperse the silica gel products at a molecular level without damaging the chemical structure of the silica gel products; "infusible" means that it cannot be transformed into liquid state by heating without destroying its chemical structure, so that the enterprises have great difficulty in making such tapered articles or other articles from the formed silicone tube because the silicone tube is soft and has a rough surface or unstable dimension even by ordinary mechanical processing.
Disclosure of Invention
The main purpose of the present invention is to solve the above existing problems and to provide a method for forming a tip of an all-silica-gel hemodialysis catheter, in which the boiling point of liquid nitrogen is-196 ℃, the temperature of a silica-gel material is-100 ℃ by using the low-temperature freezing effect of liquid nitrogen, the silica-gel material is hardened, and the hardened silica-gel tube is quickly taken out and machined, so that the appearance and the size of the machined tube are greatly improved, and the machined surface is smooth and stable in size.
The invention further aims to provide a method for forming the tip of the full-silica gel hemodialysis catheter, which can be used for processing the catheter made of silica gel or rubber into a required shape quickly and at low cost.
The technical scheme of the invention is as follows: a method for forming the tip of a full-silica gel hemodialysis catheter comprises the following steps,
placing a silica gel catheter in a closed container, wherein the closed container is provided with a liquid nitrogen placing valve, a release valve for releasing liquid nitrogen and a turnover door for the silicon gel catheter to enter and exit;
filling liquid nitrogen into the closed container, so that the silica gel guide pipe is immersed in the liquid nitrogen for at least one minute, and hardening the silica gel guide pipe by cooling the liquid nitrogen;
and step three, rapidly releasing the liquid nitrogen in the closed container, taking the hardened silica gel guide pipe out of the closed container, and immediately processing the hardened silica gel guide pipe into the silica gel guide pipe with the tip through a chamfering machine.
This beveler includes the chute feeder, blade group and blade anchor clamps and AC motor, wherein, this AC motor's motor shaft is connected with this blade anchor clamps transmission, this blade group installs in this blade anchor clamps, this chute feeder sets up the one side at this blade group, the silica gel pipe after the sclerosis impels to the inside of this blade group through the chute feeder, it rotates to drive the blade anchor clamps after this AC motor rotates, thereby drive the blade group and carry out cutting process to the silica gel pipe after the sclerosis, and process into most advanced form, this blade group can adjust the angle of cutting, the most advanced shape and the size that the silica gel pipe after the sclerosis needs to process are realized through the opening of adjustment blade group.
The release valve is connected with an extraction device, and the liquid nitrogen is collected again by the extraction device and then recycled.
The invention has the beneficial effects that: the method comprises the following steps that firstly, a silica gel guide pipe is placed in a closed container, and the closed container is provided with a liquid nitrogen placing valve, a release valve for releasing liquid nitrogen and a turnover door for the silicon gel guide pipe to enter and exit; filling liquid nitrogen into the closed container, so that the silica gel guide pipe is immersed in the liquid nitrogen for at least one minute, and hardening the silica gel guide pipe by cooling the liquid nitrogen; and step three, rapidly releasing the liquid nitrogen in the closed container, taking the hardened silica gel guide pipe out of the closed container, and immediately processing the hardened silica gel guide pipe into the silica gel guide pipe with the tip through a chamfering machine. Silica gel or rubber both belong to high polymer materials and can be in different phase states at different temperatures, and from the perspective of the phase state, the material is only changed in mechanical state, when the material is in a low-temperature condition, the state is changed, and when the material is restored to a normal-temperature condition, all properties can be restored. The boiling point of liquid nitrogen is-196 ℃, the temperature of the silica gel material reaches-100 ℃ by utilizing the low-temperature freezing effect of liquid nitrogen, the silica gel material is hardened, the hardened silica gel pipe is quickly taken out for machining, the appearance and the size after machining are greatly improved, and the machined surface is smooth and the size is stable.
Drawings
Fig. 1 is a schematic view of a silica gel catheter of the present invention placed in a closed container.
Fig. 2 is a schematic view of the chamfering machine of the present invention.
FIG. 3 is a schematic view of a silica gel catheter of the present invention processed into a tip shape.
Detailed Description
Referring to fig. 1, 2 and 3, a method for forming a tip of an all-silica gel hemodialysis catheter according to a preferred embodiment of the present invention includes the following steps,
firstly, the silicone rubber conduit 10 is placed in a closed container 20, and the closed container 20 is provided with a liquid nitrogen A placing valve 21, a releasing valve 22 for releasing the liquid nitrogen A and a turnover door 23 for the silicone rubber conduit 10 to go in and out.
And step two, filling liquid nitrogen A into the closed container 20, so that the silica gel guide pipe 10 is immersed in the liquid nitrogen A for at least one minute, and hardening the silica gel guide pipe 20 through cooling of the liquid nitrogen A.
And step three, rapidly releasing the liquid nitrogen in the closed container A, taking the hardened silica gel guide tube 10 out of the closed container 20, and immediately processing the hardened silica gel guide tube 10 into the silica gel guide tube 10 with the tip through a chamfering machine 30.
Further, the chamfering machine 30 includes a feeding slot 31, a blade set 32, a blade holder 33 and an ac motor 34, wherein a motor shaft 341 of the ac motor 34 is in transmission connection with the blade holder 33, the blade set 32 is installed in the blade holder 33, the feeding slot 31 is disposed at one side of the blade set 32, the hardened silicone rubber guide tube 10 is pushed into the blade set 32 through the feeding slot 31, the blade holder 33 is driven to rotate after the ac motor 35 rotates, so as to drive the blade set 32 to cut the hardened silicone rubber guide tube 10 and process the silicone rubber guide tube into a tip shape 11 (as shown in fig. 3), the blade set 32 can adjust a cutting angle, and the shape and size of a tip to be processed of the hardened silicone rubber guide tube 10 are realized by adjusting an opening of the blade set.
The liquid nitrogen A of the present invention can be recycled by connecting an extraction device 24 to the release valve 22, and the liquid nitrogen A is collected again by the extraction device 24 and then recycled.
The invention is realized in that silica gel or rubber both belong to high polymer materials and can be in different phase states at different temperatures, and from the phase state perspective, the material is only changed in mechanical state, when the material is in a low-temperature condition, the state is changed, and when the material is restored to a normal-temperature condition, all performances can be restored. The boiling point of liquid nitrogen is-196 ℃, the temperature of the silica gel material reaches-100 ℃ by utilizing the low-temperature freezing effect of liquid nitrogen, the silica gel material is hardened, the hardened silica gel pipe is quickly taken out for machining, and the appearance and the size after machining are greatly improved.
The embodiments and drawings of the present invention are only for illustrating the design concept of the present invention, and the scope of the present invention should not be limited to the embodiments.
It will be seen from the foregoing that the objects of the invention are efficiently attained. The portions of the embodiments illustrate the objects of the invention and implement the functional and structural subject matter, and include other equivalents.
Accordingly, the claims hereof are to be construed to include other equivalent implementations, the scope of which is to be determined by reference to the claims.
Claims (2)
1. A method for forming the tip of a full-silica gel hemodialysis catheter is characterized by comprising the following steps: the method comprises the following steps that firstly, a silica gel guide pipe is placed in a closed container, and the closed container is provided with a liquid nitrogen placing valve, a release valve for releasing liquid nitrogen and a turnover door for the silica gel guide pipe to enter and exit; filling liquid nitrogen into the closed container, so that the silica gel guide pipe is immersed in the liquid nitrogen for at least one minute, and hardening the silica gel guide pipe by cooling the liquid nitrogen; rapidly releasing the liquid nitrogen in the closed container, taking the hardened silica gel guide pipe out of the closed container, and immediately processing the hardened silica gel guide pipe into a silica gel guide pipe with a tip through a chamfering machine;
this beveler includes the chute feeder, blade group and blade anchor clamps and AC motor, wherein, this AC motor's motor shaft is connected with this blade anchor clamps transmission, this blade group installs in this blade anchor clamps, this chute feeder sets up the one side at this blade group, the silica gel pipe after the sclerosis impels to the inside of this blade group through the chute feeder, it rotates to drive the blade anchor clamps after this AC motor rotates, thereby drive the blade group and carry out cutting process to the silica gel pipe after the sclerosis, and process into most advanced form, this blade group can adjust the angle of cutting, the most advanced shape and the size that the silica gel pipe after the sclerosis needs to process are realized through the opening of adjustment blade group.
2. The method of claim 1, wherein the release valve is connected to a pump, and the liquid nitrogen is collected again by the pump and recycled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610100496.9A CN106903735B (en) | 2016-02-24 | 2016-02-24 | Method for forming tip of all-silica gel hemodialysis catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610100496.9A CN106903735B (en) | 2016-02-24 | 2016-02-24 | Method for forming tip of all-silica gel hemodialysis catheter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106903735A CN106903735A (en) | 2017-06-30 |
| CN106903735B true CN106903735B (en) | 2020-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610100496.9A Active CN106903735B (en) | 2016-02-24 | 2016-02-24 | Method for forming tip of all-silica gel hemodialysis catheter |
Country Status (1)
| Country | Link |
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| CN (1) | CN106903735B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108032361B (en) * | 2017-11-27 | 2019-11-05 | 宁波江北文增新材料科技有限公司 | Sponge cutting apparatus |
| CN110978081B (en) * | 2019-12-30 | 2020-11-17 | 康毛娣 | Punching method for automobile sealing strip |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5795521A (en) * | 1996-09-06 | 1998-08-18 | Johnson & Johnson Medical, Inc. | Moldless beveling of catheters |
| US10092958B2 (en) * | 2012-12-12 | 2018-10-09 | Sandvik Materials Technology Deutschland Gmbh | Processing machine and method for working the end of a pipe |
| CN105188823B (en) * | 2013-03-15 | 2019-07-30 | 雅培心血管系统有限公司 | The tip of reduction material for conduit and the method for forming it |
| CN203418389U (en) * | 2013-06-04 | 2014-02-05 | 张卫兴 | Wafer chamfering machine |
| CN104260143B (en) * | 2014-07-18 | 2016-04-27 | 西安交通大学 | A kind of resin base fiber reinforced composite material low temperature drilling machining device and method |
| CN204585329U (en) * | 2015-04-30 | 2015-08-26 | 天津蒙特立医疗科技有限责任公司 | A kind of Multifunction biological medicine research experiment automatic clinical microtome |
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| CN106903735A (en) | 2017-06-30 |
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