CN112743726A - Process for forming filling cavity of formed latex catheter with bag - Google Patents
Process for forming filling cavity of formed latex catheter with bag Download PDFInfo
- Publication number
- CN112743726A CN112743726A CN202011531333.9A CN202011531333A CN112743726A CN 112743726 A CN112743726 A CN 112743726A CN 202011531333 A CN202011531333 A CN 202011531333A CN 112743726 A CN112743726 A CN 112743726A
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- China
- Prior art keywords
- mold
- dipping
- latex
- auxiliary
- metal
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- 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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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/14—Dipping a core
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M25/1027—Making of balloon catheters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/34—Component parts, details or accessories; Auxiliary operations
- B29C41/38—Moulds, cores or other substrates
- B29C41/40—Cores
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M25/1027—Making of balloon catheters
- A61M25/1029—Production methods of the balloon members, e.g. blow-moulding, extruding, deposition or by wrapping a plurality of layers of balloon material around a mandril
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/753—Medical equipment; Accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/753—Medical equipment; Accessories therefor
- B29L2031/7542—Catheters
- B29L2031/7543—Balloon catheters
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Anesthesiology (AREA)
- Biophysics (AREA)
- Pulmonology (AREA)
- Child & Adolescent Psychology (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Manufacturing & Machinery (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention discloses a process for molding an inflated cavity of a latex catheter with a bag, which comprises the following steps: the main mold is dipped with a coagulant, dipped with latex and dried to form a dry adhesive film on the upper part; forming a coagulant layer on the auxiliary mold by impregnating the coagulant into the auxiliary mold which is formed into the shape of the filling cavity and the filling opening in advance and drying; splicing and locking the main die template and the auxiliary die template through screw hole positions at two ends of the main die template and the auxiliary die template; adjusting the positions of the auxiliary die and the main die to attach the metal filaments and the interface on the auxiliary die to the main die; dipping latex, dipping coagulant and drying to clamp the thin line on the secondary die between two adhesive films; and the dried adhesive film is pulled out from the upper part through a demoulding process, and a cavity channel is formed at the position of the auxiliary mould. The invention has simple process, and can avoid the problem that the molded carrier is taken out and scrapped when the guide pipe is demoulded as much as possible.
Description
Technical Field
The invention relates to a process for forming a filling cavity of a latex catheter with a sac, in particular to a process for forming the filling cavity of the latex catheter with the sac.
Background
The latex catheter with the bag is used as a medical intervention device, can be widely applied in the clinical field, can be used as a catheter, plays an important role in surgical catheterization, hemostasis, drainage, drug irrigation, bladder irrigation and development diagnosis and treatment technologies, and can also be used as an expansion catheter for expansion or auxiliary expansion treatment of the digestive tract stenosis.
Fig. 1 is a schematic structural diagram of a process for preforming a rubber wire or a guide wire used for forming a filling cavity in a conventional balloon-equipped latex catheter, and a primary mold 1 and a secondary mold 2 are visible in the diagram. The traditional process for forming the filling cavity of the latex catheter with the bag by using a rubber wire or guide wire preforming process specifically comprises the following steps: 1) dipping a layer of latex in the main mold and the auxiliary mold in advance; 2) using scissors to subtract the adhesive film at the head part of the auxiliary die; 3) adhering a rubber wire on the main die, and 4) using a guide wire to penetrate through the auxiliary die hole, leaving a part and penetrating the rubber wire, drawing the guide wire to bring the rubber wire through the auxiliary die, and twisting the direction of the auxiliary die to obtain the specifically prepared latex catheter with the capsule.
Disclosure of Invention
In view of the above problems, the present invention aims to provide a process for forming a filling cavity of a formed latex catheter with a balloon, which can avoid the problem that a formed carrier is taken out and scrapped when the catheter is demolded as much as possible.
Therefore, the technical scheme provided by the invention is as follows:
a process for molding a filling cavity of a latex catheter with a bag comprises the following steps:
1) dipping a coagulant in the master mold, dipping latex in the master mold, and drying to form a dry adhesive film on the master mold, wherein the master mold is a magnetic master mold; 2) forming a coagulator layer on an auxiliary mold which is pre-formed into a shape with a filling cavity and a filling opening by impregnating the coagulator and drying, wherein the auxiliary mold is made of a metal material; 3) when the main mold is in contact with the auxiliary mold, the auxiliary mold is attracted by the main mold, and then the positions of the main mold and the auxiliary mold are adjusted, so that the metal filaments arranged on the auxiliary mold and the connecting port at the top of the metal filaments are attached to the main mold; 4) The metal filaments on the secondary die are clamped between the two newly formed adhesive films by dipping latex, dipping coagulant and drying; 5) and (4) pulling the dried adhesive film obtained in the step (4) out of the mold through a demolding process, and forming a cavity channel at the position of the secondary mold.
Preferably, the secondary mould is prepared by the following steps: the metal filament is bent into a shape that the front end and the rear end are parallel and the included angles between the middle section and the two ends are obtuse angles by using a bending process, then the metal filament is wrapped in plastic by using an insert injection molding process, and the metal filament wrapped with the plastic is bonded on a metal base by using an adhesive to form a secondary die.
Preferably, the master mold is prepared by the following steps: the cylindrical magnet is plugged into the hollow metal rod, the metal plug is used for plugging the front end to form the metal tube, and then the magnetic base and the metal tube are bonded by using an adhesive.
Preferably, the main mold dipping solidification liquid is 20 wt% of divalent metal salts + 70 wt% of alcohol volatile substances + 10 wt% of water.
Preferably, the secondary mold dipping solidification liquid is 20 wt% of divalent metal salts + 70 wt% of alcohol volatile substances + 10 wt% of water.
Preferably, the impregnating coagulator is 20 wt% of divalent metal salts + 70 wt% of alcohol volatile substances + 10 wt% of water.
Preferably, the divalent metal salts used by the main mold dipping coagulating liquid, the auxiliary mold dipping coagulating liquid and the dipping coagulating agent are all calcium nitrate or calcium chloride, and the volatile alcohols used by the main mold dipping coagulating liquid, the auxiliary mold dipping coagulating liquid and the dipping coagulating agent are all edible ethanol or isopropanol.
Preferably, the impregnating latex is a pre-vulcanized latex.
Compared with the prior art, the technical scheme provided by the invention has the following technical advantages
The method is characterized in that a secondary die is manufactured by utilizing the magnetic adsorption of the main die, the secondary die comprises a metal thin wire and a metal base, the main die is independently impregnated with a glue film, then the glue film is spliced by matching magnetism with the secondary die, and the angle and the distance between the secondary die and the main die are adjusted, so that the preforming operation can be completed.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic diagram of a process for preforming a rubber wire or guide wire for use in forming an inflation lumen of a conventional balloon-containing latex catheter;
FIG. 2 is one of the schematic structural diagrams of the process of the present invention;
FIG. 3 is a second schematic diagram of the process of the present invention;
FIG. 4 is a third schematic structural diagram of the process of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not to be construed as limiting the invention in any way, and any limited number of modifications which can be made by anyone within the scope of the claims are still within the scope of the claims.
Referring to fig. 2-4, a process for forming a filled lumen of a latex catheter with a balloon 4 is shown in fig. 3. The invention discloses a process for molding an filling cavity of a latex catheter with a bag, which comprises the following steps:
1) the main mold 1 forms a dry adhesive film on the main mold through operations of dipping a coagulant, dipping latex and drying, wherein the main mold 1 is a main mold with magnetism, and the dipping latex is pre-vulcanized latex; 2) forming a coagulant layer on the auxiliary mold 2 by impregnating the auxiliary mold which is formed into a filling cavity and a filling opening in advance through a coagulant dipping operation and a drying operation, wherein the auxiliary mold is made of a metal material; 3) when the main mold 1 contacts with the auxiliary mold 2, the main mold attracts the auxiliary mold, and then the positions of the main mold and the auxiliary mold are adjusted, so that the metal filaments arranged on the auxiliary mold and the connecting port at the top of the metal filaments are attached to the main mold; 4) the metal filaments on the secondary die are clamped between the two newly formed adhesive films by dipping latex, dipping coagulant and drying; 5) and (4) pulling the dried adhesive film obtained in the step (4) out of the mold through a demolding process, and forming a cavity channel at the position of the secondary mold.
Preferably, the secondary mould 2 is prepared by the following steps: the metal filament is bent into a shape that the front end and the rear end are parallel and the included angles between the middle section and the two ends are obtuse angles by using a bending process, then the metal filament is wrapped in plastic by using an insert injection molding process, and the metal filament wrapped with the plastic is bonded on a metal base by using an adhesive to form a secondary die.
Preferably, the master mold 1 is prepared by the following steps: a cylindrical magnet 6 is inserted into a hollow metal rod 5, a metal plug 7 is used to plug the front end to form a metal tube, and then a magnetic base 8 and the metal tube are bonded together by using an adhesive.
Preferably, the main mold dipping coagulating liquid is 20 wt% of divalent metal salt + 70 wt% of alcohol volatile substance + 10 wt% of water, wherein the divalent metal salt can be calcium nitrate or calcium chloride, and the alcohol substance can be edible ethanol or isopropanol.
Preferably, the secondary mold dipping solidification liquid is 20 wt% of divalent metal salt, 70 wt% of alcohol volatile substance and 10 wt% of water, wherein the divalent metal salt can be calcium nitrate or calcium chloride, and the alcohol substance can be edible ethanol or isopropanol.
Preferably, the impregnating coagulator comprises 20 wt% of divalent metal salt, 70 wt% of alcohol volatile substance and 10 wt% of water, wherein the divalent metal salt can be calcium nitrate or calcium chloride, and the alcohol substance can be edible ethanol or isopropanol.
The method is characterized in that a secondary die is manufactured by utilizing the magnetic adsorption of the main die, the secondary die comprises a metal thin wire and a metal base, the main die is independently impregnated with a glue film, then the glue film is spliced by matching magnetism with the secondary die, and the angle and the distance between the secondary die and the main die are adjusted, so that the preforming operation can be completed.
The above description is of the preferred embodiment of the invention. It is to be understood that the invention is not limited to the particular embodiments described above, in that devices and structures not described in detail are understood to be implemented in a manner common in the art; those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or modify equivalent embodiments to equivalent variations, without departing from the spirit of the invention, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (8)
1. A process for forming a filling cavity of a formed latex catheter with a bag is characterized by comprising the following steps:
1) dipping a coagulant in the master mold, dipping latex in the master mold, and drying to form a dry adhesive film on the master mold, wherein the master mold is a magnetic master mold;
2) forming a coagulator layer on an auxiliary mold which is pre-formed into a shape with a filling cavity and a filling opening by impregnating the coagulator and drying, wherein the auxiliary mold is made of a metal material;
3) when the main mold is in contact with the auxiliary mold, the auxiliary mold is attracted by the main mold, and then the positions of the main mold and the auxiliary mold are adjusted, so that the metal filaments arranged on the auxiliary mold and the connecting port at the top of the metal filaments are attached to the main mold;
4) the metal filaments on the secondary die are clamped between the two newly formed adhesive films by dipping latex, dipping coagulant and drying;
5) and (4) pulling the dried adhesive film obtained in the step (4) out of the mold through a demolding process, and forming a cavity channel at the position of the secondary mold.
2. The process for forming the filled lumen of the latex catheter with the balloon according to claim 1, wherein the secondary mold is prepared by the steps of:
the metal filament is bent into a shape that the front end and the rear end are parallel and the included angles between the middle section and the two ends are obtuse angles by using a bending process, then the metal filament is wrapped in plastic by using an insert injection molding process, and the metal filament wrapped with the plastic is bonded on a metal base by using an adhesive to form a secondary die.
3. The process for forming the filling cavity of the latex catheter with the balloon according to claim 1, wherein the master mold is prepared by the following steps:
the cylindrical magnet is plugged into the hollow metal rod, the metal plug is used for plugging the front end to form the metal tube, and then the magnetic base and the metal tube are bonded by using an adhesive.
4. The process for molding the filling cavity of the latex catheter with the bag as claimed in claim 2 or 3, wherein the main mold dipping coagulation solution comprises 20 wt% of divalent metal salts + 70 wt% of volatile alcohols + 10 wt% of water.
5. The process for molding the filling cavity of the latex catheter with the bag as claimed in claim 4, wherein the secondary mold dipping solidification solution comprises 20 wt% of divalent metal salts, 70 wt% of volatile alcohols and 10 wt% of water.
6. The process for molding the filling cavity of the latex catheter with the bag according to claim 5, wherein the impregnating coagulator comprises 20 wt% of divalent metal salts, 70 wt% of volatile alcohols and 10 wt% of water.
7. The process for molding the filling cavity of the latex catheter with the bag according to claim 6, wherein the divalent metal salts used by the primary mold dipping coagulating liquid, the secondary mold dipping coagulating liquid and the dipping coagulating agent are all calcium nitrate or calcium chloride, and the volatile alcohols used by the primary mold dipping coagulating liquid, the secondary mold dipping coagulating liquid and the dipping coagulating agent are all edible ethanol or isopropanol.
8. The process for forming the filling lumen of the latex catheter with the balloon according to claim 7, wherein the dipping latex is pre-vulcanized latex.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011531333.9A CN112743726A (en) | 2020-12-22 | 2020-12-22 | Process for forming filling cavity of formed latex catheter with bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011531333.9A CN112743726A (en) | 2020-12-22 | 2020-12-22 | Process for forming filling cavity of formed latex catheter with bag |
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| Publication Number | Publication Date |
|---|---|
| CN112743726A true CN112743726A (en) | 2021-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011531333.9A Pending CN112743726A (en) | 2020-12-22 | 2020-12-22 | Process for forming filling cavity of formed latex catheter with bag |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040167506A1 (en) * | 2003-02-25 | 2004-08-26 | Scimed Life Systems, Inc. | Medical devices employing ferromagnetic heating |
| CN1537647A (en) * | 2003-10-22 | 2004-10-20 | 高春平 | Tumour close internal rediation therapy device presetted in operation |
| CN101357249A (en) * | 2008-09-02 | 2009-02-04 | 扬中金祥乳胶制品有限公司 | Silica-gel coating catheters and production technique thereof |
| WO2013179411A1 (en) * | 2012-05-30 | 2013-12-05 | テルモ株式会社 | Medical tube and method for producing same |
| CN106470730A (en) * | 2014-06-27 | 2017-03-01 | 奥林巴斯株式会社 | Conduit, conduit die for manufacturing, the manufacture method of conduit |
| CN209937695U (en) * | 2019-03-27 | 2020-01-14 | 山东吉威医疗制品有限公司 | Flaring device of heat-shrinkable tube for balloon protective sleeve |
| CN111070504A (en) * | 2019-12-24 | 2020-04-28 | 广东亿康医疗器械有限公司 | Preparation method of latex catheter mold |
-
2020
- 2020-12-22 CN CN202011531333.9A patent/CN112743726A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040167506A1 (en) * | 2003-02-25 | 2004-08-26 | Scimed Life Systems, Inc. | Medical devices employing ferromagnetic heating |
| CN1537647A (en) * | 2003-10-22 | 2004-10-20 | 高春平 | Tumour close internal rediation therapy device presetted in operation |
| CN101357249A (en) * | 2008-09-02 | 2009-02-04 | 扬中金祥乳胶制品有限公司 | Silica-gel coating catheters and production technique thereof |
| WO2013179411A1 (en) * | 2012-05-30 | 2013-12-05 | テルモ株式会社 | Medical tube and method for producing same |
| CN106470730A (en) * | 2014-06-27 | 2017-03-01 | 奥林巴斯株式会社 | Conduit, conduit die for manufacturing, the manufacture method of conduit |
| CN209937695U (en) * | 2019-03-27 | 2020-01-14 | 山东吉威医疗制品有限公司 | Flaring device of heat-shrinkable tube for balloon protective sleeve |
| CN111070504A (en) * | 2019-12-24 | 2020-04-28 | 广东亿康医疗器械有限公司 | Preparation method of latex catheter mold |
Non-Patent Citations (2)
| Title |
|---|
| 唐颂超等: "《高分子材料成型加工第三版》", 31 May 2013, 中国轻工业出版社 * |
| 胡又牧等: "《胶乳应用技术》", 31 October 1990, 化学工业出版社 * |
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Application publication date: 20210504 |