CN112297384A - A kind of medical tube extrusion molding method - Google Patents
A kind of medical tube extrusion molding method Download PDFInfo
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- CN112297384A CN112297384A CN202011079374.9A CN202011079374A CN112297384A CN 112297384 A CN112297384 A CN 112297384A CN 202011079374 A CN202011079374 A CN 202011079374A CN 112297384 A CN112297384 A CN 112297384A
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- 238000001125 extrusion Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 54
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 239000007787 solid Substances 0.000 claims abstract description 18
- 238000012545 processing Methods 0.000 claims abstract description 5
- 238000011221 initial treatment Methods 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims description 14
- 238000004513 sizing Methods 0.000 claims description 9
- 238000011282 treatment Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000012797 qualification Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000007670 refining Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000741 silica gel Substances 0.000 description 4
- 229910002027 silica gel Inorganic materials 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- 238000001035 drying Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 229920002529 medical grade silicone Polymers 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/80—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the plasticising zone, e.g. by heating cylinders
- B29C48/83—Heating or cooling the cylinders
- B29C48/832—Heating
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a medical tube extrusion molding method, which comprises the following steps of S1: feeding the dried solid raw material into a charging barrel through a hopper, and performing primary treatment on the raw material under the coordination of the charging barrel and a screw rod arranged on the charging barrel to obtain a liquid raw material; step S2: the liquid feedstock is passed through a handpiece fitted with a die to form a medical tube of a first form. The medical tube extrusion molding method disclosed by the invention has the advantages that the qualification rate of the medical tube is greatly improved by detecting for multiple times and feeding back the detection to adjust the processing process in time.
Description
Technical Field
The invention belongs to the technical field of medical tube extrusion molding, and particularly relates to a medical tube extrusion molding method.
Background
With the development of catheter diagnosis and treatment technology, the clinical application of medical catheters is gradually developed, and the demand is continuously increased. With the development of society and economy, the living standard of people is continuously improved, higher requirements on medical catheters are continuously put forward in clinic, and the catheter industry is required to be continuously innovated to meet the clinical requirements.
The medical catheter has the characteristics of small size, complex shape, high geometric accuracy requirement, high sanitary index, high biochemical stability and the like. Therefore, the production difficulty of the precise medical catheter is very high, the conventional processing equipment and process can not meet the production requirement, and most of the precise medical catheters in China depend on import at present. Therefore, the development of the precise medical catheter has extremely important significance for the localization of interventional medical instruments, the cost reduction and the improvement of the health level of people. The precise medical catheter has wide market prospect in China, not only brings remarkable economic benefit, but also is beneficial to improving the health level of the nation and brings huge social benefit.
However, the prior medical tube has the problems of high product qualification rate, low production efficiency, untimely size feedback adjustment and the like in the production process.
The publication number is: CN103624948A, entitled medical catheter tubing extrusion molding method, the technical scheme thereof discloses that "medical catheter tubing is prepared by extruding medical resin, precooling with water ring and sizing in vacuum in sequence";
the publication number is: CN107031019A, subject name: the invention patent of an extrusion method of a medical silicone tube, the technical scheme thereof discloses that (1) a silica gel raw material is placed on a tray and weighed, and the weight of a vulcanizing agent is weighed according to the weighed weight of the silica gel raw material and the respective proportion of vulcanizing agents A/B; (2) rolling and refining the raw rubber in a rubber refining machine, continuously refining for 1min, adding a small amount of a platinum vulcanizing agent B component 3-5 times in 20s, continuously refining for 2.5min, adding a small amount of a platinum vulcanizing agent A component 3-5 times in 20s, rolling and refining for more than 15 times after adding the platinum vulcanizing agent A component; (3) feeding the mixed silica gel raw material into a feeding port of an extruder, shaping through a high-temperature box drying channel, adjusting the extrusion rotating speed and the traction speed, and performing primary vulcanization extrusion through a low-temperature box drying channel to obtain a silica gel tube; (4) cutting the extruded silicone tube into a specified length, and placing the cut silicone tube into a blast oven to bake to obtain a finished silicone tube product.
Taking the above invention patent as an example, although the extrusion molding of the medical tube is mentioned, the technical scheme of the invention is different from that of the invention, and the invention improves the qualification rate of the product through multiple detections, and adjusts the size of the product through timely feedback, etc. Therefore, the above problems are further improved.
Disclosure of Invention
The invention mainly aims to provide a medical tube extrusion molding method, which can greatly improve the qualification rate of medical tubes by detecting for many times and feeding back the detection to adjust the treatment process in time.
The invention also aims to provide a medical tube extrusion molding method which has the advantages of high medical tube precision, high qualification rate, high production efficiency and the like.
In order to achieve the above purpose, the invention provides an extrusion molding method of a medical tube, which is used for manufacturing a qualified medical tube and comprises the following steps:
step S1: feeding the dried solid raw material (preferably PE raw material) into a barrel through a hopper, and performing primary treatment (crushing, softening, melting, plasticizing, exhausting, compacting and the like on the raw material) under the cooperation of the barrel and a screw arranged on the barrel to obtain liquid raw material (changing granular solid raw material into viscous fluid raw material);
step S2: the liquid raw material passes through a machine head provided with a die to form a medical tube in a first shape (preliminarily molded to obtain a continuous shape with the cross section consistent with the shape of the neck mold, and the shape is liquid at the moment);
step S3: the medical tube in the first form is subjected to second treatment to form a medical tube in a second form, first detection is carried out on the medical tube in the second form to judge whether the medical tube in the second form meets the preset specification or not, the second treatment is fed back according to the result of the first detection, and real-time adjustment is carried out on the second treatment (so as to obtain a qualified medical tube in the second form);
step S4: the traction device continuously pulls the medical tubes in the second form, the cutter cuts the pulled medical tubes in the second form according to the preset length to form medical tubes in a third form, second detection is carried out on the medical tubes in the third form, and classification is carried out on the medical tubes in the third form (so that finally qualified medical tubes are obtained and are led into a qualified area, the qualified medical tubes are put in storage, and unqualified medical tubes are led into an unqualified area and are recycled, crushed and reused).
As a further preferable embodiment of the above technical means, step S1 is specifically implemented as the following steps:
step S1.1: the inner side wall of the charging barrel is provided with a plurality of heating areas with different temperatures, and the heating temperature is gradually increased from the input end of the charging barrel to the output end of the charging barrel, so that the solid raw material is gradually changed into the liquid raw material (the gradually heated heating areas are arranged to be beneficial to plasticizing the solid raw material into the liquid raw material, and the heating lengths of the different heating areas can be set according to actual requirements);
step S1.2: when the solid raw material is heated and gradually changed into the liquid raw material, the solid raw material is also subjected to the rotating pressure of the continuously rotating screw (on one hand, the raw material is favorably pushed to advance, and on the other hand, the raw material is continuously moved, so that the plasticization of the solid raw material is favorably changed into the liquid raw material).
As a further preferable embodiment of the above technical means, step S3 is specifically implemented as the following steps:
step S3.1: sizing the medical tube in the first form through a sizing sleeve to determine the outer diameter of the medical tube in the second form;
step S3.2: introducing gas into the medical tube in the first form, and adjusting the gas pressure to determine the inner diameter size of the medical tube in the second form;
step S3.3: cooling the medical tube in the first form to solidify and mold the medical tube in the second form (simultaneously with the steps S3.1 and S3.2);
step S3.4: detecting the outer diameter of the medical tube in the second shape, and judging whether the outer diameter of the medical tube in the second shape meets the preset specification;
step S3.5: and detecting the inner diameter size of the medical tube in the second shape, and judging whether the inner diameter size of the medical tube in the second shape meets the preset specification.
As a further preferable embodiment of the above technical means, step S1 is specifically implemented as the following steps: step S3.4 is specifically implemented as the following steps:
step S3.4.1: and if the outer diameter of the medical tube in the second form does not meet the preset specification, performing outer diameter adjustment (including operations of adjusting the cooling temperature, replacing the sizing sleeve and the like).
As a further preferable embodiment of the above technical means, step S1 is specifically implemented as the following steps: step S3.5 is specifically implemented as the following steps:
step S3.5.1: if the inner diameter of the medical tube in the second form is larger than the preset specification, reducing the input air pressure through the step S3.2;
step S3.5.2: if the internal diameter of the second modality medical tube is less than the preset gauge, the input air pressure is increased via step S3.2.
As a further preferable embodiment of the above technical means, step S4 is specifically implemented as the following steps:
step S4.1: detecting the outer diameter of the medical tube in the third shape to judge whether the medical tube in the third shape meets the preset specification;
step S4.2: and detecting the inner diameter size of the medical tube in the third shape to judge whether the medical tube in the third shape meets the preset specification.
As a further preferred embodiment of the above technical solution, step S4.1 is specifically implemented as the following steps:
step S4.1.1: if the medical tube in the third form does not meet the preset specification, guiding the medical tube into an unqualified area;
step S4.1.2: and if the medical tube in the third shape meets the preset specification, leading the medical tube into a qualified area.
As a further preferred embodiment of the above technical solution, step S4.2 is specifically implemented as the following steps:
step S4.2.1: if the medical tube in the third form does not meet the preset specification, guiding the medical tube into an unqualified area;
step S4.2.2: and if the medical tube in the third shape meets the preset specification, leading the medical tube into a qualified area.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
In the preferred embodiment of the present invention, it should be noted by those skilled in the art that the barrel, hopper, screw, etc. to which the present invention relates can be regarded as prior art.
Preferred embodiments.
The invention discloses a medical tube extrusion molding method, which is used for manufacturing qualified medical tubes and comprises the following steps:
step S1: feeding the dried solid raw material (preferably PE raw material) into a barrel through a hopper, and performing primary treatment (crushing, softening, melting, plasticizing, exhausting, compacting and the like on the raw material) under the cooperation of the barrel and a screw arranged on the barrel to obtain liquid raw material (changing granular solid raw material into viscous fluid raw material);
step S2: the liquid raw material passes through a machine head provided with a die to form a medical tube in a first shape (preliminarily molded to obtain a continuous shape with the cross section consistent with the shape of the neck mold, and the shape is liquid at the moment);
preferably, the head functions to convert the rotating raw material into a parallel linear motion, uniformly and smoothly introduce the raw material into the mold, and to impart a necessary molding pressure.
Step S3: the medical tube in the first form is subjected to second treatment to form a medical tube in a second form, first detection is carried out on the medical tube in the second form to judge whether the medical tube in the second form meets the preset specification or not, the second treatment is fed back according to the result of the first detection, and real-time adjustment is carried out on the second treatment (so as to obtain a qualified medical tube in the second form);
step S4: the traction device continuously pulls the medical tubes in the second form, the cutter cuts the pulled medical tubes in the second form according to the preset length to form medical tubes in a third form, second detection is carried out on the medical tubes in the third form, and classification is carried out on the medical tubes in the third form (so that finally qualified medical tubes are obtained and are led into a qualified area, the qualified medical tubes are put in storage, and unqualified medical tubes are led into an unqualified area and are recycled, crushed and reused).
Specifically, step S1 is implemented as the following steps:
step S1.1: the inner side wall of the charging barrel is provided with a plurality of heating regions (including resistance heating and induction heating) with different temperatures, and the heating temperature is gradually increased from the input end of the charging barrel to the output end of the charging barrel, so that the solid raw material is gradually changed into the liquid raw material (the gradually heated heating regions are arranged to be beneficial to plasticizing the solid raw material to be changed into the liquid raw material, and the heating lengths of the different heating regions can be set according to actual requirements);
preferably, a cooling device is arranged below the barrel, on one hand, redundant heat generated by shearing friction of screw rotation is removed so as to prevent raw materials from decomposing, scorching or difficult in characterization due to overhigh temperature, and on the other hand, normal work of a transmission part is ensured.
Preferably, the temperature of the cartridge is set to a range of: if the temperature is too low, the raw material is not plasticized enough, so that the product has inner wall concave points, scutching and the like, if the temperature is too high, the current can be too high to stop, and if the temperature is too high, the plasticizing can be excessive, so that the product quality is influenced.
Step S1.2: when the solid raw material is heated and gradually changed into the liquid raw material, the solid raw material is also subjected to the rotating pressure of the continuously rotating screw (on one hand, the raw material is favorably pushed to advance, and on the other hand, the raw material is continuously moved, so that the plasticization of the solid raw material is favorably changed into the liquid raw material).
More specifically, step S3 is specifically implemented as the following steps:
step S3.1: sizing the medical tube in the first form through a sizing sleeve to determine the outer diameter of the medical tube in the second form;
step S3.2: introducing gas into the medical tube in the first form, and adjusting the gas pressure to determine the inner diameter size of the medical tube in the second form;
step S3.3: cooling the medical tube in the first form to solidify and mold the medical tube in the second form (simultaneously with the steps S3.1 and S3.2);
step S3.4: detecting the outer diameter of the medical tube in the second shape, and judging whether the outer diameter of the medical tube in the second shape meets the preset specification;
step S3.5: and detecting the inner diameter size of the medical tube in the second shape, and judging whether the inner diameter size of the medical tube in the second shape meets the preset specification.
Further, step S1 is specifically implemented as the following steps: step S3.4 is specifically implemented as the following steps:
step S3.4.1: and if the outer diameter of the medical tube in the second form does not meet the preset specification, performing outer diameter adjustment (including operations of adjusting the cooling temperature, replacing the sizing sleeve and the like).
Further, step S1 is implemented as the following steps: step S3.5 is specifically implemented as the following steps:
step S3.5.1: if the inner diameter of the medical tube in the second form is larger than the preset specification, reducing the input air pressure through the step S3.2;
step S3.5.2: if the internal diameter of the second modality medical tube is less than the preset gauge, the input air pressure is increased via step S3.2.
Preferably, step S4 is embodied as the following steps:
step S4.1: detecting the outer diameter of the medical tube in the third shape to judge whether the medical tube in the third shape meets the preset specification;
step S4.2: and detecting the inner diameter size of the medical tube in the third shape to judge whether the medical tube in the third shape meets the preset specification.
Preferably, step S4.1 is embodied as the following steps:
step S4.1.1: if the medical tube in the third form does not meet the preset specification, guiding the medical tube into an unqualified area;
step S4.1.2: and if the medical tube in the third shape meets the preset specification, leading the medical tube into a qualified area.
Preferably, step S4.2 is embodied as the following steps:
step S4.2.1: if the medical tube in the third form does not meet the preset specification, guiding the medical tube into an unqualified area;
step S4.2.2: and if the medical tube in the third shape meets the preset specification, leading the medical tube into a qualified area.
Preferably, the warehousing qualification rate of the final medical tubes is greatly improved through the first detection and the second detection, the first detection is used for detecting the size of the medical tubes in the second form in real time, and timely feeding back is performed for adjustment, so that large batches of unqualified products cannot occur, the second detection is used for filtering and removing the unqualified products obtained by the first detection, if the unqualified products are removed from the first detection, more steps are required to be added, the efficiency is greatly reduced, the second detection is used for removing the unqualified products which are not detected by the first detection, and the error is reduced.
Preferably, the detection of the inner and outer diameters may be by laser detection, ultrasonic detection, or the like.
It should be noted that the technical features of the barrel, the hopper, the screw rod and the like related to the present patent application should be regarded as the prior art, the specific structure and the working principle of the technical features and the control mode and the spatial arrangement mode which may be related to the technical features should be selected conventionally in the field, and should not be regarded as the invention point of the present patent, and the present patent is not further specifically described in detail.
It will be apparent to those skilled in the art that modifications and equivalents may be made in the embodiments and/or portions thereof without departing from the spirit and scope of the present invention.
Claims (8)
1. A medical tube extrusion molding method is used for manufacturing qualified medical tubes and is characterized by comprising the following steps:
step S1: feeding the dried solid raw material into a charging barrel through a hopper, and performing primary treatment on the raw material under the coordination of the charging barrel and a screw rod arranged on the charging barrel to obtain a liquid raw material;
step S2: the liquid raw material passes through a machine head provided with a mould to form a medical tube with a first shape;
step S3: the medical tube in the first form is subjected to second processing to form a medical tube in a second form, first detection is carried out on the medical tube in the second form to judge whether the medical tube in the second form meets the preset specification or not, the second processing is fed back according to the result of the first detection, and real-time adjustment is carried out on the second processing;
step S4: the traction device continuously pulls the medical tube in the second form, the cutting machine cuts the pulled medical tube in the second form according to the preset length to form the medical tube in the third form, and the medical tube in the third form is subjected to second detection and classification.
2. The medical tube extrusion molding method according to claim 1, wherein the step S1 is implemented as the following steps:
step S1.1: the inner side wall of the charging barrel is provided with a plurality of heating areas with different temperatures, and the heating temperature is gradually increased from the input end of the charging barrel to the output end of the charging barrel so as to gradually change the solid raw material into the liquid raw material;
step S1.2: the solid raw material is heated to gradually become a liquid raw material, and is simultaneously subjected to the rotating pressure of the screw which rotates continuously.
3. The medical tube extrusion molding method according to claim 2, wherein the step S3 is implemented as the following steps:
step S3.1: sizing the medical tube in the first form through a sizing sleeve to determine the outer diameter of the medical tube in the second form;
step S3.2: introducing gas into the medical tube in the first form, and adjusting the gas pressure to determine the inner diameter size of the medical tube in the second form;
step S3.3: cooling the medical tube in the first form to solidify and form the extruded medical tube in the second form;
step S3.4: detecting the outer diameter of the medical tube in the second shape, and judging whether the outer diameter of the medical tube in the second shape meets the preset specification;
step S3.5: and detecting the inner diameter size of the medical tube in the second shape, and judging whether the inner diameter size of the medical tube in the second shape meets the preset specification.
4. The medical tube extrusion molding method according to claim 3, wherein the step S1 is implemented by the following steps: step S3.4 is specifically implemented as the following steps:
step S3.4.1: and if the outer diameter of the medical tube in the second form does not meet the preset specification, performing outer diameter adjustment treatment.
5. The medical tube extrusion molding method according to claim 4, wherein the step S1 is implemented by the following steps: step S3.5 is specifically implemented as the following steps:
step S3.5.1: if the inner diameter of the medical tube in the second form is larger than the preset specification, reducing the input air pressure through the step S3.2;
step S3.5.2: if the internal diameter of the second modality medical tube is less than the preset gauge, the input air pressure is increased via step S3.2.
6. The medical tube extrusion molding method according to any one of claims 1 to 5, wherein the step S4 is embodied as the following steps:
step S4.1: detecting the outer diameter of the medical tube in the third shape to judge whether the medical tube in the third shape meets the preset specification;
step S4.2: and detecting the inner diameter size of the medical tube in the third shape to judge whether the medical tube in the third shape meets the preset specification.
7. The medical tube extrusion molding method according to claim 6, wherein the step S4.1 is embodied as the following steps:
step S4.1.1: if the medical tube in the third form does not meet the preset specification, guiding the medical tube into an unqualified area;
step S4.1.2: and if the medical tube in the third shape meets the preset specification, leading the medical tube into a qualified area.
8. The medical tube extrusion molding method according to claim 7, wherein the step S4.2 is embodied as the following steps:
step S4.2.1: if the medical tube in the third form does not meet the preset specification, guiding the medical tube into an unqualified area;
step S4.2.2: and if the medical tube in the third shape meets the preset specification, leading the medical tube into a qualified area.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011079374.9A CN112297384A (en) | 2020-10-10 | 2020-10-10 | A kind of medical tube extrusion molding method |
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| CN202011079374.9A CN112297384A (en) | 2020-10-10 | 2020-10-10 | A kind of medical tube extrusion molding method |
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| CN112297384A true CN112297384A (en) | 2021-02-02 |
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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