CN108297462B - Manufacturing method of ultra-small diameter plastic pipe - Google Patents
Manufacturing method of ultra-small diameter plastic pipe Download PDFInfo
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- CN108297462B CN108297462B CN201810009498.6A CN201810009498A CN108297462B CN 108297462 B CN108297462 B CN 108297462B CN 201810009498 A CN201810009498 A CN 201810009498A CN 108297462 B CN108297462 B CN 108297462B
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- pipe
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- tube
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
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- Mechanical Engineering (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
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Abstract
The invention discloses a manufacturing method of an ultra-small diameter plastic pipe, which can efficiently and reliably realize the processing of the ultra-small diameter plastic pipe. The invention comprises the following steps: (1) preparing materials; (2) cutting; (3) shaping; (4) placing a roller; (5) setting a conical pipe; (6) placing a core rod; (7) placing the silk thread; (8) heating: heating the plastic film in the conical tube when the plastic film passes through the conical tube; (9) placing a welding conduit: a welding conduit with the diameter as large as that of the plastic pipe is arranged at the outlet of the conical pipe; (10) welding: after the formed plastic pipe comes out of the conical pipe and enters the welding guide pipe, welding an interface formed by the overlapping edges of the plastic pipe through the welding guide pipe; (11) and (6) rolling.
Description
Technical Field
The invention relates to a processing technology of an ultra-small diameter plastic pipe, which is particularly used for processing a plastic capillary in the medical and electronic fields.
Background
The plastic capillary tube has wide application in the medical and electronic fields, and is used for realizing the transmission of fluid, light wave, sound wave, current, power and position information, and the capillary tube used in minimally invasive surgery in the medical field, and the like.
The existing capillary tube is extruded and molded by pressurizing molten plastic through a special die, and for the pore diameter smaller than 0.1mm, an embedded core rod is used for extrusion molding, and after cooling and shaping, the core rod is drawn out.
The extrusion molding process has the problems of pipe diameter size bottleneck, short length and the like due to the restriction of process characteristics, the top-level extrusion equipment supplier in the world is German Davis company, the minimum outer diameter of a capillary tube which can be manufactured by the extrusion molding process can only be 0.5mm, the minimum inner diameter of the capillary tube is 0.05mm, and the length of the capillary tube with the inner diameter smaller than 0.1mm can only be 300 mm. Because the extrusion process depends on the fluidity of the plastic to form the package on the core rod, when the thickness of the pipe wall is smaller than a certain value and is limited by the fluidity of the material, the plastic can not effectively coat the core rod to form a complete pipe wall, and the extrusion molding can not be finished. For the pipe with the ultra-fine inner diameter, because of the strength limitation, a fixed core rod cannot be adopted, only a pre-buried metal wire can be adopted as the core rod, when the length is too long, and the core rod needs to be drawn out after the forming is finished, the tiny core rod is easy to break, so that the pipe is scrapped, and the pipe with the inner diameter smaller than 0.1mm is usually only 300mm long.
Disclosure of Invention
The invention discloses a manufacturing method of an ultra-small diameter plastic pipe, which can efficiently and reliably realize the processing of the ultra-small diameter plastic pipe, compared with the prior art, the inner diameter of the pipe can be processed to a smaller interval, and the wall thickness is uniform; the processing process is stable and reliable.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a method for manufacturing an ultra-small diameter plastic pipe comprises the following steps:
(1) preparing materials: different ultrathin plastic films are purchased according to the needs;
(2) cutting: cutting the purchased plastic film into required widths;
(3) shaping: before the plastic film is introduced into the conical pipe, cutting the two ends of the plastic film into lap edges by using a blade above the plastic film;
(4) placing rollers: feeding the cut plastic film into the conical tube through the rollers, placing the rollers on one side of the plastic film outside the conical tube, and allowing the rollers to rotate simultaneously to drive the plastic film to advance towards the conical tube;
(5) setting of the conical pipe: manufacturing a conical pipe with the radius as large as that of the plastic pipe;
(6) placing a core rod: putting a conical hollow core rod from the opening of the conical tube, wherein the core rod is made of stainless steel or copper material, and the diameter of the core rod is smaller than or equal to the inner diameter of the conical tube;
(7) placing the silk threads: putting a silk thread into the core rod;
(8) heating: heating the plastic film in the conical tube when the plastic film passes through the conical tube;
(9) placing a welding conduit: a welding conduit with the diameter as large as that of the plastic pipe is arranged at the outlet of the conical pipe;
(10) welding: after the formed plastic pipe comes out of the conical pipe and enters the welding guide pipe, welding an interface formed by the overlapping edges of the plastic pipe through the welding guide pipe;
(11) and (6) rolling.
As a preferred embodiment of the present invention: in the step (10), a laser welding technology is adopted, so that laser penetrates through the welding conduit to weld the interface of the plastic pipe.
As a preferred embodiment of the present invention: in the step (3), the shape of the overlapping edge is a rectangle protruding from the end face of the plastic film, and the two overlapping edges on the two end faces of the plastic film have the same size and are symmetrical in position.
As a preferred embodiment of the present invention:
in the step (1), the thickness of the purchased ultrathin film is +/-0.005 mm of the required material thickness;
and (3) in the step (2), cutting by using a circular cutter, wherein the cutting width is larger than the circumference of the formed tube, and the cut tube is used as an auxiliary for subsequent processing.
As a preferred embodiment of the present invention: the ultra-small diameter plastic pipe is a finished product finally obtained in the step (10); the inner diameter of the ultra-small diameter plastic pipe is less than 0.1 mm; the length is more than 300 mm.
The invention has the beneficial effects that:
the invention discloses a method for manufacturing an ultra-small diameter plastic pipe, which utilizes the perfect combination of the thin film, the rolling and the welding technology to manufacture an ultra-thin plastic film. In the manufacturing process, the characteristics of the conical tube are utilized, the ultrathin plastic film is processed and shaped, then the ultrathin plastic film is sent into the conical tube, the plastic film can automatically approach the tube wall in the process of pushing the plastic film into the conical tube by utilizing the tension of the plastic film, a rolling circle with the outer diameter as large as the outer diameter of the bottom of the conical tube is formed when the plastic film comes out of the conical tube, and finally the rolling circle is welded at the lap joint, so that the super-small-diameter plastic tube is completed. The whole process is efficient, reliable and stable, and the plastic pipe with a smaller diameter interval can be formed.
Drawings
FIG. 1 is a view showing the processing effect of the main process of the present invention;
FIG. 2 is a modified plan view of the landing edge of the present invention;
fig. 3 is a schematic view of the butt joint position of the modified overlapping edge.
Description of reference numerals:
1-film, 2-soldering flux, 3-shaping, cutting and feeding, 4-tapered tube, 5-welding machine, 6-welding guide tube and 7-tapered core rod.
The specific implementation mode is as follows:
the following description of the embodiments of the present invention refers to the accompanying drawings and examples:
as shown in the drawings, which illustrate the specific embodiment of the present invention, the method for manufacturing the ultra-small diameter plastic pipe disclosed by the present invention specifically operates as follows:
(1) preparing materials: different ultrathin films are purchased according to the needs.
(2) Cutting: the purchased film is slit to the desired width.
(3) Shaping: before the plastic film is introduced into the conical pipe, cutting the two ends of the plastic film into lap edges by using a blade above the plastic film;
(4) placing rollers: and (3) feeding the cut film into the conical tube through the rollers, placing the rollers on one side of the film outside the conical tube, and allowing the rollers to rotate simultaneously to drive the film to advance towards the conical tube.
(5) A conical tube: a conical tube with a radius as large as the plastic tube was made. One end of the conical pipe is an inlet, and the other end of the conical pipe is an outlet; the plastic film enters from the inlet, and the plastic film is molded into a plastic pipe after the plastic film exits from the outlet; the inlet diameter is greater than the outlet diameter; in this embodiment, the step of manufacturing the tapered tube having a radius as large as that of the plastic tube means that the radius of the inlet of the tapered tube is larger than the outer diameter of the plastic tube, and the diameter of the outlet of the tapered tube is equal to the outer diameter of the plastic tube.
(6) Placing a core rod: and (3) putting a conical hollow core rod from the opening of the conical pipe, wherein the core rod is made of stainless steel or copper material, and the diameter of the core rod is the inner diameter of the pipe.
(7) Placing the silk threads: putting a silk thread into the core rod;
(8) heating: the plastic film is heated as it passes through the tapered tube. (the heating temperature is determined by the characteristics of the plastic film, and the plastic film is different from one another.)
(9) Placing a welding conduit: at the outlet of the conical tube a welding catheter is placed, the inner diameter of which is as large as the outer diameter of the plastic tube.
(10) Welding: after the formed plastic pipe comes out of the conical pipe and enters the welding guide pipe, the laser welding technology is adopted, and laser penetrates through the welding guide pipe to weld the interface of the plastic pipe. (the welding method is various and is not limited to exciting welding.)
(11) And (6) rolling.
Preferably: in the step (10), a laser welding technology is adopted, so that laser penetrates through the welding conduit to weld the interface of the plastic pipe.
Preferably: in the step (3), the shape of the overlapping edge is a rectangle protruding from the end face of the plastic film, and the two overlapping edges on the two end faces of the plastic film have the same size and are symmetrical in position.
Preferably:
in the step (1), the thickness of the purchased ultrathin film is +/-0.005 mm of the required material thickness;
and (3) in the step (2), cutting by using a circular cutter, wherein the cutting width is larger than the circumference of the formed tube, and the cut tube is used as an auxiliary for subsequent processing.
Preferably: the ultra-small diameter plastic pipe is a finished product finally obtained in the step (10); the inner diameter of the ultra-small diameter plastic pipe is less than 0.1 mm; the length is more than 300 mm.
In conclusion, the invention is an innovation of perfectly combining the ultrathin film, the rolling and the welding technology, and further producing the ultrathin capillary tube, and the invention comprises the following innovation points:
(1) utilization of the conical tube: in the process of manufacturing the capillary plastic tube, the conical forming tube is adopted, and the plastic film is led into the forming tube to form a rolling circle, so that the diameter of the plastic tube is easier to control in operation, and the operation is more convenient and concise.
(2) The laser welding technology comprises the following steps: the shape of the plastic pipe just coming out of the conical pipe is unstable and easy to deform, and the joint of the plastic films is welded together by adopting a laser welding technology, so that the plastic pipe is not easy to deform.
(3) Modification of the lap edge: the thickness of a plastic pipe manufactured usually is thickened at the interface, and a plastic film entering a conical pipe is shaped, so that the thickness of the plastic film at the interface is the same as that of other parts when the plastic film is formed into a roll.
(4) Pushing the roller: the method is characterized in that the plastic film is fed into the conical tube by a roller pushing method, before the plastic film enters the conical tube, the roller is placed on one side of the plastic film, the roller rotates, and the friction force of the roller drives the plastic film to advance towards the conical tube.
(5) Reduction of yield radius: the unprocessed plastic film has larger yield radius ratio and is not easy to form. We heat the plastic film in a conical tube to reduce its yield radius, making it easier to shape.
(6) Utilization of the core rod: a conical core rod with the bottom inner diameter as large as the inner diameter of the plastic pipe is placed in the conical pipe, so that the plastic film is easier to form, and the inner diameter of the manufactured plastic pipe is more accurate.
(7) Wire embedding: in the mandrel we put a wire. The silk thread and the plastic film are advanced forwards together, so that the plastic pipe with the silk thread in the center is manufactured more simply and quickly.
(8) Utilization of the welding catheter: the plastic film just after coming out of the conical tube is recycled and shrunk, and the shape is not stable. A welding guide pipe with the same outer diameter as that of a plastic pipe is arranged at the outlet of the conical pipe, the formed plastic pipe directly enters the welding guide pipe after coming out of the conical pipe, the shape of the rolling circle is continuously kept, and the plastic pipe is welded in the welding guide pipe.
While the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the above embodiments, and various changes, which relate to the related art known to those skilled in the art and fall within the scope of the present invention, can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims.
Claims (5)
1. A method for manufacturing an ultra-small diameter plastic pipe is characterized by comprising the following steps:
(1) preparing materials: different ultrathin plastic films are purchased according to the needs;
(2) cutting: cutting the purchased plastic film into required widths;
(3) shaping: before the plastic film is introduced into the conical pipe, cutting the two ends of the plastic film into lap edges by using a blade above the plastic film;
(4) placing rollers: feeding the cut plastic film into the conical tube through the rollers, placing the rollers on one side of the plastic film outside the conical tube, and allowing the rollers to rotate simultaneously to drive the plastic film to advance towards the conical tube;
(5) setting of the conical pipe: manufacturing a conical pipe with the radius as large as that of the plastic pipe;
(6) placing a core rod: putting a conical hollow core rod from the opening of the conical tube, wherein the core rod is made of stainless steel or copper material, and the diameter of the core rod is smaller than or equal to the inner diameter of the conical tube;
(7) placing the silk threads: putting a silk thread into the core rod;
(8) heating: heating the plastic film in the conical tube when the plastic film passes through the conical tube;
(9) placing a welding conduit: a welding conduit with the diameter as large as that of the plastic pipe is arranged at the outlet of the conical pipe;
(10) welding: after the formed plastic pipe comes out of the conical pipe and enters the welding guide pipe, welding an interface formed by the overlapping edges of the plastic pipe through the welding guide pipe;
(11) and (6) rolling.
2. A method of making an ultra small diameter plastic tube according to claim 1, wherein:
in the step (1), the thickness of the purchased ultrathin film is +/-0.005 mm of the required material thickness;
and (3) in the step (2), cutting by using a circular cutter, wherein the cutting width is larger than the circumference of the formed tube, and the cut tube is used as an auxiliary for subsequent processing.
3. A method of making an ultra small diameter plastic tube according to claim 1, wherein: the ultra-small diameter plastic pipe is a finished product finally obtained in the step (10); the inner diameter of the ultra-small diameter plastic pipe is less than 0.1 mm; the length is more than 300 mm.
4. A method of making an ultra small diameter plastic tube according to claim 1, wherein: in the step (10), a laser welding technology is adopted, so that laser penetrates through the welding conduit to weld the interface of the plastic pipe.
5. A method of making an ultra small diameter plastic tube according to claim 1, wherein: in the step (3), the shape of the overlapping edge is a rectangle protruding from the end face of the plastic film, and the two overlapping edges on the two end faces of the plastic film have the same size and are symmetrical in position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810009498.6A CN108297462B (en) | 2018-01-05 | 2018-01-05 | Manufacturing method of ultra-small diameter plastic pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810009498.6A CN108297462B (en) | 2018-01-05 | 2018-01-05 | Manufacturing method of ultra-small diameter plastic pipe |
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| Publication Number | Publication Date |
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| CN108297462A CN108297462A (en) | 2018-07-20 |
| CN108297462B true CN108297462B (en) | 2020-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810009498.6A Active CN108297462B (en) | 2018-01-05 | 2018-01-05 | Manufacturing method of ultra-small diameter plastic pipe |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1128700A (en) * | 1994-11-08 | 1996-08-14 | 佳能株式会社 | Tubular film, method for mfg. same and image formation device with tubular film |
| WO2004072528A2 (en) * | 2003-02-14 | 2004-08-26 | Windmöller & Hölscher Kg | Tubular film, device and method for producing the same |
| CN106457642A (en) * | 2014-06-02 | 2017-02-22 | 科思创有限公司 | Process for production of tubular films for protection of medical devices |
| CN106457643A (en) * | 2014-04-17 | 2017-02-22 | 艾萨帕克控股公司 | Method and device for the extrusion and labelling of a packaging tube |
| CN206555589U (en) * | 2016-11-08 | 2017-10-13 | 厦门建霖工业有限公司 | Special-shaped flexible pipe and its manufacture mould |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2452685A (en) * | 2007-09-12 | 2009-03-18 | Netafim Ltd | Cross-laminate film for irrigation pipe |
-
2018
- 2018-01-05 CN CN201810009498.6A patent/CN108297462B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1128700A (en) * | 1994-11-08 | 1996-08-14 | 佳能株式会社 | Tubular film, method for mfg. same and image formation device with tubular film |
| WO2004072528A2 (en) * | 2003-02-14 | 2004-08-26 | Windmöller & Hölscher Kg | Tubular film, device and method for producing the same |
| CN106457643A (en) * | 2014-04-17 | 2017-02-22 | 艾萨帕克控股公司 | Method and device for the extrusion and labelling of a packaging tube |
| CN106457642A (en) * | 2014-06-02 | 2017-02-22 | 科思创有限公司 | Process for production of tubular films for protection of medical devices |
| CN206555589U (en) * | 2016-11-08 | 2017-10-13 | 厦门建霖工业有限公司 | Special-shaped flexible pipe and its manufacture mould |
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| CN108297462A (en) | 2018-07-20 |
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Address after: 518000 floors 1-5 of building B, Aiqun Road, Longteng community, Shiyan street, Bao'an District, Shenzhen, Guangdong Province Patentee after: Shenzhen Hongxun Manufacturing Technology Co.,Ltd. Address before: 518100 east of the first floor and west of the second floor of building B, Aiqun Road, Tongfu Industrial Zone, Shangwu community, Shiyan street, Bao'an District, Shenzhen, Guangdong Province Patentee before: HONG XUN (SHENZHEN) INDUSTRIAL CO.,LTD. |
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