CN109774163B - Capsule welding device and welding method - Google Patents
Capsule welding device and welding method Download PDFInfo
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- CN109774163B CN109774163B CN201711446606.8A CN201711446606A CN109774163B CN 109774163 B CN109774163 B CN 109774163B CN 201711446606 A CN201711446606 A CN 201711446606A CN 109774163 B CN109774163 B CN 109774163B
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- 238000003466 welding Methods 0.000 title claims abstract description 117
- 239000002775 capsule Substances 0.000 title claims abstract description 94
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- 238000004519 manufacturing process Methods 0.000 abstract description 8
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- 238000005299 abrasion Methods 0.000 description 3
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- 229910000838 Al alloy Inorganic materials 0.000 description 1
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- 206010011409 Cross infection Diseases 0.000 description 1
- 206010017472 Fumbling Diseases 0.000 description 1
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- 238000001839 endoscopy Methods 0.000 description 1
- 210000003238 esophagus Anatomy 0.000 description 1
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- 238000003384 imaging method Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
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- 210000000936 intestine Anatomy 0.000 description 1
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- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008855 peristalsis Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
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- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention discloses a capsule welding device and a welding method, in particular to a capsule welding device, comprising an ultrasonic welding head for capsule welding and an ultrasonic welding base; the ultrasonic welding head comprises a first section, a second section and a third section; the end face of the third section is provided with a first groove which is used for accommodating capsules to be welded; the surface of the base is provided with a second groove, and when the second groove is butted with the first groove, the second groove and the first groove form a cavity for accommodating capsules to be welded together. The invention also discloses a capsule welding method, which is characterized in that the upper end cover and the lower end cover of the capsule are connected through an ultrasonic welding process, so that the method of using glue for connection in the traditional process is replaced, and the production efficiency is improved.
Description
Technical Field
The invention relates to the field of capsule manufacturing, in particular to a capsule welding device and a welding method.
Background
A capsule endoscope (Capsule endoscopy) is a capsule-shaped endoscope, which is a medical instrument used for examining the intestinal tract of a human body. The capsule endoscope can enter the human body and is used for peeping the health condition of the intestines, stomach and esophagus parts of the human body. The capsule endoscope with the built-in camera shooting and signal transmission device is orally taken by a subject, the capsule endoscope moves in the digestive tract by means of peristalsis of the digestive tract and shoots images, and a doctor knows the condition of the whole digestive tract of the subject by using an external image recorder and an image workstation, so that the doctor can diagnose the illness state of the subject. The capsule endoscope has the advantages of convenient examination, no wound, no lead, no pain, no cross infection, no influence on the normal work of patients, and the like, expands the visual field of digestive tract examination, and overcomes the defects of poor tolerance, inapplicability to the aged, the weak, critical illness and the like of the traditional insertion endoscope. Can be used to assist doctors in diagnosing patients. A typical capsule endoscope structure includes: the device comprises a transparent shell, a light source, an imaging element, a sensor, a battery, a transmitting module and an antenna.
In the processing and manufacturing of electronic capsule equipment such as a capsule endoscope at present, the capsule shells are basically connected by a glue dispenser or manually by gluing. The defect of adopting adhesive connection is that after the glue is bonded, the glue is required to be solidified for a long time, and the production efficiency is affected.
Disclosure of Invention
The invention provides a capsule welding device and a welding method for welding shells of electronic capsule equipment such as a capsule endoscope and the like so as to solve the technical problems of low bonding production efficiency and poor sealing performance.
A first aspect of the present invention provides a capsule welding apparatus comprising an ultrasonic welding head for capsule welding, and an ultrasonic welding base;
The ultrasonic welding head comprises a first section, a second section and a third section; the first section is cylindrical and is arranged for connection to a transducer; the second section is positioned between the first section and the third section, the second section is connected with the first section through a first connecting part, and the second section is connected with the third section through a second connecting part; the third section is cylindrical, and a first groove is formed in the end face of the third section;
The surface of the base is provided with a second groove, and when the second groove is butted with the first groove, the second groove and the first groove form a cavity for accommodating capsules to be welded together.
When the capsule to be welded is placed in the cavity, the outer wall of the capsule to be welded is closely attached to the inner wall of the cavity.
Preferably, the depth of the first groove is greater than or equal to one half of the length of the capsule to be welded.
Preferably, the diameter of the first section is greater than the diameter of the third section.
Preferably, the second section has a circular cross section, the diameter of the first connecting portion is equal to the diameter of the first section, and the diameter of the second connecting portion is equal to the diameter of the third section.
Preferably, the second segment tapers in cross-sectional diameter from the first connection to the second connection. More preferably, the outer peripheral surface of the second segment is curved, and the diameter thereof becomes gradually smaller.
Preferably, the first, second and third segments are integrally formed.
Preferably, the length ratio of the first section to the second section to the third section is 1.5-3:1:1; more preferably 2:1:1.
Preferably, the ratio of the diameter of the first segment to the diameter of the third segment is 1.4-1.8:1; more preferably 1.6 to 1.
Preferably, the width of the first segment is equal to the length of the second segment.
Preferably, the width of the first segment is equal to the length of the third segment.
Preferably, the outer wall of the first section is provided with a locking hole matched with the fastening bolt.
More preferably, the locking holes include first and second locking holes symmetrically disposed.
Preferably, the capsule is a vibrating capsule.
A second aspect of the present invention provides a capsule welding method using the capsule welding apparatus of the first aspect of the present invention, the method comprising the steps of:
(1) Providing a capsule to be welded and placing the capsule into the second groove on the surface of the base;
(2) Moving the ultrasonic welding head downwards to enable the first groove to be in butt joint with the second groove, and then performing ultrasonic welding on the capsule;
(3) After welding is completed, separating the ultrasonic welding head and the base; the welded capsule is then removed.
Preferably, the outer wall of the capsule is made of medical polycarbonate.
Preferably, the capsule diameter is 10mm-12mm; the length is 18-20mm.
Preferably, in the step (2), the amplitude is set to 95% -100% of the maximum amplitude, more preferably 100% during the ultrasonic welding.
Preferably, in the step (2), the dwell time is set to 0.15s to 0.25s, more preferably 0.2s, during the ultrasonic welding.
Preferably, in the step (2), the delay time during the ultrasonic welding is set to 0.4s to 0.6s, more preferably 0.5s.
Preferably, in the step (2), the energy is set to 90j-110j, more preferably 100j during the ultrasonic welding.
Preferably, in the step (2), parameters of ultrasonic welding the capsule are as follows:
The amplitude is set to 95% -100% of the maximum amplitude, the dwell time is set to 0.15s-0.25s, the delay time is set to 0.4s-0.6s, and the energy is set to 90j-110j.
The term "maximum amplitude" in the present invention refers to the distance in the length direction from a lowest end to a highest end of an ultrasonic welding head at the time of welding.
The term "delay time" in the present invention refers to the time from when the first groove is butted with the second groove to when the ultrasonic wave is started.
The term "dwell time" in the present invention refers to the time after which the ultrasonic waves stop to maintain the abutment of the first groove with the second groove.
The term "energy" in the present invention is ultrasonic welding power times ultrasonic welding time.
More preferably, the amplitude is set to 100%, the dwell time is set to 0.2s, the delay time is set to 0.5s, and/or the energy is set to 100j.
Preferably, the grounding time is set to 0.2s and the air pressure is set to 2.6kg.
Compared with the prior art, the invention has the beneficial effects that: the upper end cover and the lower end cover of the capsule are connected through an ultrasonic welding process, so that a method of using glue for connection in the traditional process is replaced, and the production efficiency is improved.
The original process glue connection is changed into ultrasonic welding, so that the time for waiting for glue solidification after the glue connection is saved, and the production efficiency is greatly improved. Meanwhile, the connection of the upper end cover and the lower end cover of the capsule is more reliable.
Drawings
Fig. 1 is a schematic perspective view of an ultrasonic welding head according to a preferred embodiment of the present invention.
Fig. 2 is a schematic view of the structure of an ultrasonic welding head according to a preferred embodiment of the present invention.
Fig. 3 is a schematic structural view of an ultrasonic welding assembly for welding capsules in accordance with a preferred embodiment of the present invention.
Fig. 4 shows a graph of the welding effect using the optimized welding method according to the preferred embodiment of the present invention.
Fig. 5 shows the welding result with a short delay time.
Fig. 6 shows the welding result with a long delay time.
Detailed Description
Example 1
Ultrasonic welding is a technique in which high-frequency vibration waves are transmitted to the surfaces of two objects to be welded, and under pressure, the surfaces of the two objects are rubbed against each other to form fusion between molecular layers. The ultrasonic welding machine is operated to convert 50/60 Hz current into 15, 20, 30 or 40KHz electric energy through an ultrasonic generator. The converted high frequency electrical energy is again converted by the transducer into an equally frequent mechanical motion, which is then transmitted to the weld head by a horn assembly that varies the amplitude. The weld head transfers the received vibrational energy to the joint of the workpieces to be welded, where it is frictionally converted into heat energy, melting the plastic.
The main components of the ultrasonic welding system comprise an ultrasonic generator, a transducer and a welding head, which are connected in sequence. The ultrasonic generator, the transducer and the welding head are fixed through the frame.
In ultrasonic welding, the role of the welding head is important, and the welding head needs to have higher hardness and better sound wave conductivity. The hardness of the weld head is typically achieved by selecting a suitable material, such as an aluminum alloy, or a titanium alloy. The acoustic wave conductivity can be improved by the structure of the weld head.
As shown in fig. 1, 2 and 3, the capsule welding device provided in this embodiment includes an ultrasonic welding head 01 and an ultrasonic welding base 4.
The ultrasonic welding head 01 comprises a first section 1, a second section 2 and a third section 3; the first segment 1 is cylindrical, the first segment 1 being arranged for connecting a transducer; the second segment 2 is located between the first segment 1 and the third segment 3, the second segment 2 is connected to the first segment 1 through a first connection 21, and the second segment 2 is connected to the third segment 3 through a second connection 22; the third segment 3 is cylindrical and the end face of the third segment 3 is provided with a first groove 31, which first groove 31 is arranged for receiving a capsule to be welded. When the capsule to be welded is placed in the first groove 31, the outer wall of the capsule is closely attached to the inner wall of the first groove 31.
In this embodiment, the depth of the first groove 31 is greater than or equal to one half of the length of the capsule to be welded. The diameter of the first segment 1 is larger than the diameter of said third segment 3. The second segment 2 has a circular cross section, the diameter of the first connecting portion 21 is equal to the diameter of the first segment 1, and the diameter of the second connecting portion 22 is equal to the diameter of the third segment 3. The second segment 2 has a cross-sectional diameter that gradually decreases from the first connecting portion 21 to the second connecting portion 22.
The structure of the weld head has a significant impact on the final welding effect. The inventor finally determines the structural parameters of the welding head capable of welding the vibration capsule through repeated fumbling experiments. In the case where the first segment 1, the second segment 2, and the third segment 3 are integrally formed, the length ratio of the first segment 1, the second segment 2, and the third segment 3 is 2:1:1. The ratio of the diameter of the first segment 1 to the diameter of said third segment 3 is 1.6:1. The width of the first segment 1 is equal to the length of the second segment 2 and the third segment 3. Thus, the length of the first segment 1 is finally set to 80mm in this embodiment; the width is 40mm. The length of the second segment 2 is 40mm, the curve of the curved surface constituting the second segment 2 is an elliptical arc with a major half axis of 29mm and a minor half axis of 19.7 mm. The length of the third segment 3 is 40mm; the width is 25mm.
The outer wall of the first segment 1 is provided with a locking hole 11 matched with the fastening bolt. The locking holes comprise two symmetrically arranged locking holes. The end face of the first section 1 is provided with a connecting hole connected with the transducer, and when the transducer is used, the connecting part of the transducer is inserted into the connecting hole and is fixed by using a fastening bolt.
As shown in fig. 3, the surface of the base 4 is provided with a second groove 41, and when the second groove 41 and the first groove 31 are in butt joint, the second groove 41 and the first groove 31 together form a chamber for accommodating a capsule to be welded.
During the welding process, the assembled capsule to be welded is placed in the second recess 41. The ultrasonic welding head is moved to enable the first groove 31 and the second groove 41 to be in butt joint, the second groove 41 and the first groove 31 together form a cavity for accommodating a capsule to be welded, and the outer wall of the capsule to be welded is closely attached to the inner wall of the cavity. And starting an ultrasonic welding program, removing the ultrasonic welding head after welding, and taking out the welded capsule.
Example 2
The embodiment provides a capsule welding method, which adopts a pneumatic ultrasonic welding machine (the manufacturer is Shanghai Rong ultrasonic equipment Co., ltd.; model DS 300) to match with the capsule welding device in the embodiment 1, and performs ultrasonic welding on a vibration capsule, wherein the outer wall of the capsule is made of medical polycarbonate; the diameter of the capsule is 11mm; the length is 19mm. The structure of a typical vibrating capsule is described in chinese patent CN 201620087784.0.
The welding process is as follows:
After parameters (such as amplitude, dwell time, delay time, grounding time, energy and air pressure) of the ultrasonic welding machine are set, the capsule shell to be welded is assembled, the capsule shell is placed into a second groove of the welding base, the ultrasonic welding machine is started, an ultrasonic welding head can automatically move downwards, and after the capsule is tightly wrapped by the first groove and the second groove, energy is conducted, so that an ultrasonic welding step is completed. After the welding is completed, the ultrasonic welding head is removed, and the welded capsule is taken out.
In combination with the capsule welding device, the final optimized parameters are set as follows through repeated adjustment experiments: the amplitude was set to 100% of the maximum amplitude, the dwell time was 0.2s, the delay time was 0.5s, the energy 100j, the ground time was 0.2s, and the air pressure was 2.6kg.
1000 Capsules are welded in one batch, three batches are welded together, water leakage detection is carried out, and the detected yields are 93.6%, 92.8% and 94.5% respectively.
The yield of ultrasonic welding before optimization is only about 60%, so that the welding method provided by the invention greatly improves the yield of capsule welding and remarkably reduces the production cost.
During the development of the capsule welding process, the inventors have found that different welding parameters have a significant impact on the welding effect. For example, different delay times have significant influence on the strength of the capsule welding, too short delay time can cause gaps in the welding port gaps, and too long delay time can cause abrasion on the top end of the capsule welding.
Fig. 4 is a graph of a weld after the completion of the welding using the optimized welding method of the present embodiment (welding parameters: amplitude set to 100%, dwell time 0.2s, delay time 0.5s, energy 100 j), and it can be seen from the graph that the welded portion is smooth, burr-free, and the capsule welding top is free from abrasion.
Fig. 5 shows the welding result when the delay time is set to 0.3s (other parameters are the same as above), and it can be seen from the figure that there is a significant gap at the welding position of the capsule, indicating that the welding effect is poor.
Fig. 6 shows the welding result when the delay time is set to 0.7s (other parameters are the same as above), and it can be seen from the figure that the welding position of the capsule has no obvious gap, but the top of the capsule has obvious abrasion, so that the operation of the devices in the capsule is affected, and the welding effect is obviously poor.
The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, the scope of which is defined by the claims. Various modifications and equivalent arrangements of this invention will occur to those skilled in the art, and are intended to be within the spirit and scope of the invention.
Claims (8)
1. A capsule welding device, characterized in that the capsule welding device comprises an ultrasonic welding head for capsule welding and an ultrasonic welding base;
the ultrasonic welding head comprises a first section, a second section and a third section; the first section is cylindrical and is arranged for connection to a transducer; the second section is positioned between the first section and the third section, the second section is connected with the first section through a first connecting part, and the second section is connected with the third section through a second connecting part; the third section is cylindrical, and a first groove is formed in the end face of the third section; the cross section of the second section is circular, the diameter of the first connecting part is equal to the diameter of the first section, and the diameter of the second connecting part is equal to the diameter of the third section; the cross section diameter of the second section from the first connecting part to the second connecting part is gradually reduced, and the curve forming the curved surface of the second section is formed by two sections of elliptical arcs with unequal long-axis radiuses; the length ratio of the first segment, the second segment and the third segment is 2:1:1;
The surface of the base is provided with a second groove, and when the second groove is in butt joint with the first groove, the second groove and the first groove form a cavity for accommodating a capsule to be welded together;
when the capsule to be welded is placed in the cavity, the outer wall of the capsule to be welded is closely attached to the inner wall of the cavity.
2. The capsule welding apparatus of claim 1, wherein the first groove depth is equal to or greater than one half of a length of the capsule to be welded.
3. The capsule welding apparatus of claim 1, wherein a diameter of the first segment is greater than a diameter of the third segment.
4. The capsule welding apparatus of claim 1, wherein the capsule is a vibrating capsule.
5. A capsule welding method, characterized in that the method uses the capsule welding apparatus according to any one of claims 1 to 4, and the method comprises the steps of:
(1) Providing a capsule to be welded and placing the capsule into the second groove on the surface of the base;
(2) Moving the ultrasonic welding head downwards to enable the first groove to be in butt joint with the second groove, and then performing ultrasonic welding on the capsule;
(3) After welding is completed, separating the ultrasonic welding head and the base; the welded capsule is then removed.
6. The method of claim 5, wherein in the step (2), the delay time is set to 0.4s to 0.6s during the ultrasonic welding.
7. The method of claim 5, wherein in step (2), the amplitude is set to 95% -100% of the maximum amplitude during ultrasonic welding.
8. The method of claim 5, wherein in the step (2), the dwell time is set to 0.15s to 0.25s during the ultrasonic welding.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711446606.8A CN109774163B (en) | 2017-12-27 | 2017-12-27 | Capsule welding device and welding method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711446606.8A CN109774163B (en) | 2017-12-27 | 2017-12-27 | Capsule welding device and welding method |
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| CN109774163A CN109774163A (en) | 2019-05-21 |
| CN109774163B true CN109774163B (en) | 2024-07-02 |
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| CN114228161A (en) * | 2021-12-31 | 2022-03-25 | 无锡骄成智能科技有限公司 | Ultrasonic welding head and ultrasonic welding device |
| CN116238182B (en) * | 2023-04-26 | 2023-09-05 | 广州市马克威尔工程材料有限公司 | Drain board composite device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1909824A (en) * | 2004-01-07 | 2007-02-07 | 奥林巴斯株式会社 | Capsule-type medical apparatus, medical capsule housing, and production method thereof |
| CN203110336U (en) * | 2012-12-19 | 2013-08-07 | 美律电子（惠州）有限公司 | Ultrasonic plastic welding machine |
| CN105032318A (en) * | 2015-08-11 | 2015-11-11 | 邯郸市海拓机械科技有限公司 | Portable ultrasonic descaling equipment |
| CN207697079U (en) * | 2017-12-27 | 2018-08-07 | 上海和初医疗科技有限公司 | A kind of ultrasonic bonding head and supersonic welding connected components for capsule welding |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170087528A (en) * | 2010-07-22 | 2017-07-28 | 카-페 시스템 게엠베하 | Single-serve capsule for making a beverage |
| FR3018268B1 (en) * | 2014-03-07 | 2016-03-11 | Polytek Innovations | METHOD AND SYSTEM FOR MANUFACTURING CAPSULE |
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- 2017-12-27 CN CN201711446606.8A patent/CN109774163B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1909824A (en) * | 2004-01-07 | 2007-02-07 | 奥林巴斯株式会社 | Capsule-type medical apparatus, medical capsule housing, and production method thereof |
| CN203110336U (en) * | 2012-12-19 | 2013-08-07 | 美律电子（惠州）有限公司 | Ultrasonic plastic welding machine |
| CN105032318A (en) * | 2015-08-11 | 2015-11-11 | 邯郸市海拓机械科技有限公司 | Portable ultrasonic descaling equipment |
| CN207697079U (en) * | 2017-12-27 | 2018-08-07 | 上海和初医疗科技有限公司 | A kind of ultrasonic bonding head and supersonic welding connected components for capsule welding |
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