CN101077624A - Novel method for laser welding of plastics - Google Patents
Novel method for laser welding of plastics Download PDFInfo
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- CN101077624A CN101077624A CNA2007100233054A CN200710023305A CN101077624A CN 101077624 A CN101077624 A CN 101077624A CN A2007100233054 A CNA2007100233054 A CN A2007100233054A CN 200710023305 A CN200710023305 A CN 200710023305A CN 101077624 A CN101077624 A CN 101077624A
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- laser
- weld seam
- welding
- plastics
- laser beam
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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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
- B29C65/1629—Laser beams characterised by the way of heating the interface
- B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
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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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
- B29C65/1696—Laser beams making use of masks
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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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
- B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
- B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
- B29C66/2424—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain
- B29C66/24249—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being a closed polygonal chain forming a specific polygon not provided for in B29C66/24241 - B29C66/24243
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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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
- B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
- B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
- B29C66/81266—Optical properties, e.g. transparency, reflectivity
- B29C66/81267—Transparent to electromagnetic radiation, e.g. to visible light
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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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
- B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
- B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
- B29C65/1616—Near infrared radiation [NIR], e.g. by YAG lasers
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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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
- B29C65/1629—Laser beams characterised by the way of heating the interface
- B29C65/1664—Laser beams characterised by the way of heating the interface making use of several radiators
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Laser Beam Processing (AREA)
Abstract
The laser plastic welding method relates to new plastic welding technology. The present invention operates on laser holography principle, and the plastic welding method includes the first record of the predicted weld seam shape by means of laser interference, the subsequent release of the whole weld seam shape information by means of laser diffraction and irradiating laser beam in the laser spot shape the same as the weld seam to the jointing surface of two plastic workpieces to reach sync welding. The method is suitable for welding with complicated weld seam, and has no need of the relative motion between the laser source and the workpiecs and high welding efficiency.
Description
Technical field
The present invention relates to the TECHNOLOGY OF WELDING PLASTICS field, refer in particular to a kind of novel method for laser welding of plastics.The present invention is according to the laser hologram principle, at first utilizing the method for laser interference will predict weld shape notes, the method of utilizing laser diffraction again discharges the full detail of weld shape, make that the shape of laser beam spot is identical with the precognition weld shape, shine the synchronous welding that finally reaches two kinds of plastics behind the two plastics part composition surfaces.The method has very high welding efficiency, and has well solved the synchronous Welding Problems of complicated weld seam.
Background technology
Traditional TECHNOLOGY OF WELDING PLASTICS comprises: ultrasonic bonding, Vibration Welding, flat plate heat welding etc.The advantage of laser plastic welding is the resin less degradation, and the chip of generation is few, because laser is untouchable, can not produce pollution in welding process.Another major advantage is that the laser plastic welding is littler than vibration stress and the thermal stress that other connected modes produced, so just improved the service life of goods or device intraware greatly, so the laser plastic welding method is more suitable for being applied to flimsy electronic sensor, microfluidic device, MEMS.In the seventies in 20th century, laser begins to be applied on the Plastic Welding, because the unique advantage of laser plastic solder technology and the development of laser technology, to the nineties in 20th century, the laser plastic solder technology has obtained large-scale commercial Application.The welding of the laser plastic the earliest application that sees bibliographical information is in 1972, uses 100 watts CO
2LASER Light Source is with the speed polyethylene welding thin plate (maximum ga(u)ge is 1.5 millimeters) of 10 millimeters of per seconds.
The laser plastic welding has obtained development fast in recent years as a kind of novel TECHNOLOGY OF WELDING PLASTICS, and all there has been comparatively deep research in each research institution to method, technology, the equipment of this technology both at home and abroad.With two plastics parts of laser weld the time, common method utilization is focused into the laser beam two-dimensional scan face of weld of a bit, and welding is finally finished in relative motion between lasing light emitter and the workpiece to be welded.In welding process, cause the buckling deformation of working of plastics easily,, then be difficult to accurately control the relative motion between lasing light emitter and the workpiece to be welded if weld shape is comparatively complicated.
Aspect the laser plastic welding method: the patent No. that Switzerland Leste Processing Tech. AG delivers is the technology of CN00101924.4: the method for laser welding of welding plastic workpiece or plastics and other materials and device, on welding method, study exactly, according to precognition weld shape designed mask plate, utilize mask plate shielding to fall the part of laser beam, the mask plate shape that can see through laser is identical with the precognition weld seam, utilizes through the light beam behind the mask plate at last plastics are welded.Its shortcoming is that the higher relative motion of speed is arranged between lasing light emitter and the plastics part to be welded, causes the buckling deformation of plastics part in welding process easily.
The present invention adjusts light path system, design holographic negative, change the light spot shape of laser beam by holographic negative, make that the light spot shape of laser beam is consistent with the precognition weld shape, and designed the transparent anchor clamps of the laser light velocity, finally finish the synchronous welding of plastics part, in welding process, there is not relative motion between lasing light emitter and the plastics part to be welded, well solved the buckling deformation problem of plastics part in welding process, and the present invention is specially adapted to the weld seam figure than complicated situation.
Summary of the invention
The purpose of this invention is to provide a kind of novel method for laser welding of plastics.According to the laser hologram principle, weld seam patterned light beam and reference beam interfere the interference pattern that produces to note the information of weld seam feature, utilize diffractive technology that the full detail of weld seam feature is discharged once more, promptly change the shape of laser facula, make the laser facula shape consistent with the precognition weld shape, shine two kinds of plastics composition surfaces, finally to-be-welded region is welded synchronously.
Purpose of the present invention is realized by following mode:
(1) make record weld seam characteristic model: on to laser beam material transparent surface, except weld seam pattern image zone, coat the opaque paint of laser beam, paint can be bought from market.
(2) make holographic negative: the stock of holographic negative is a glass substrate, and thickness is 1～1.5mm, coating one deck silver halide emulsion fine grained on the surface of glass substrate, and thickness is 6～15 μ m.
Laser instrument adopts He-Ne laser, the laser beam that He-Ne laser sends is adjusted light path through speculum, is divided into two bundle laser beams through beam splitter again: wherein obtain the weld seam patterned light beam after the weld seam character shape partial reflection on irradiation record weld seam graphical model surface after the beam of laser expansion spot size; Another Shu Jiguang obtains reference beam after enlarging spot size, weld seam patterned light beam and reference beam are interfered on fine grain of glass substrate coating silver halide emulsion, produce interference pattern, after noting interference fringe, after handling (development, photographic fixing, drying and sealing) through physics and chemistry again, fixing interference pattern, holographic negative completes.The holographic negative that completes is equivalent to a diffraction grating, because holographic negative made by glass material, so possess higher diffraction efficiency.
(3) carry out Plastic Welding: when plastic welding laser, select optical fiber laser for use.After optical fiber laser sends laser beam, through a convex lens combination expansion of laser light beam and focus size, the light spot shape that the holographic negative of laser beam irradiation after spot size enlarges obtains laser beam is with to predict weld shape consistent, utilize the composition surface of two plastics parts of laser beam irradiation that obtain at last, finally form weld seam.
Description of drawings
Fig. 1 is holographic negative manufacturing process schematic diagram
Fig. 2 is record weld seam graphical model schematic diagram
Fig. 3 is the welding schematic diagram
Fig. 4 is the weld seam schematic diagram
Fig. 5 is specific embodiment record " protruding " font weld seam graphical model surface size figure
1 He-Ne laser; 2 laser beams; 3 speculums; 4 beam splitters; 5 little convex lens; 6 big convex lens; 7 record weld seam graphical models; 8 weld seam character shape parts; 9 paint; 10 holographic negatives; 11 silver halide emulsion fine graineds; 12 optical fiber lasers; 13 laser beams; 14 anchor clamps; 15 light transmission plastics parts; 16 light absorptive plastics parts; 17 composition surfaces; 18 weld seams
The specific embodiment
Now for example with " protruding " font weld seam.
Select welding material: light transmission polyvinyl chloride (PVC): long: 50mm, wide: 50mm is thick: 2mm; Light absorptive polyvinyl chloride (PVC): long: 50mm, wide: 50mm is thick: 2mm.
The first step is made record weld seam characteristic model: the material of record weld seam graphical model is a K9 glass, and size: long: 50mm is wide: 50mm is thick: 2mm.Except that weld seam character shape part 8, coat laser beam 2 opaque paint 9 on record weld seam graphical model 7 surfaces.Surface size such as Fig. 5 (unit: mm).
Second step was made holographic negative: holographic negative 10 is made size by glass substrate: long: 50mm, wide: 50mm is thick: 1mm.And at glass baseplate surface coating one deck silver halide emulsion fine grained 11, thickness 10 μ m.
He-Ne laser 1 sends laser beam 2, and laser beam 2 is adjusted light path through speculum 3, is divided into two bundle laser through beam splitter 4 again:
Wherein beam of laser is adjusted light path through speculum 3, and planoconvex lens combination 5,6 enlarges spot size, and (expand to diameter: 80mm) laser beam that obtains after weld seam character shape part 8 reflections on back irradiation record weld seam graphical model 7 surfaces is the weld seam patterned light beam.
Another bundle laser beam is adjusted light path through speculum 3, and planoconvex lens combination 5,6 enlarges spot size and (expands to diameter: 80mm) obtain reference beam.
Weld seam patterned light beam and reference beam are interfered on the face of glass substrate coating silver halide emulsion fine grained 11, produce interference pattern, note interference fringe after, handle (development, photographic fixing, drying and seal) through physics and chemistry again after, fixing interference pattern, holographic negative 10 completes.This process such as accompanying drawing 1.
The 3rd step was carried out Plastic Welding: optical fiber laser 12 sends laser beam 13, laser beam 13 planoconvex lenses combination 5, the light spot shape that obtains laser beam after the 6 expansion spot sizes behind the holographic negative 10 of irradiation is identical with the precognition weld shape, spot diameter: 80mm, shine two plastics parts 15,16 composition surface 17, irradiation time: 10s finally forms weld seam 18.Desirable weld width is 1.3mm.Transparent anchor clamps 14 have guaranteed the closely contact under pressure of two plastics parts 15,16.This process such as accompanying drawing 3.
Claims (2)
1, a kind of novel method for laser welding of plastics is characterized in that, carries out according to following steps:
(1) makes record weld seam characteristic model: on to laser beam material transparent surface, except weld seam pattern image zone, coat to the opaque paint of laser beam;
(2) make holographic negative: the laser beam that laser instrument sends is adjusted light path through speculum, be divided into two bundle laser beams through beam splitter again, wherein obtain the weld seam patterned light beam after the weld seam character shape regional reflex on irradiation record weld seam graphical model surface after the beam of laser expansion spot size; Another Shu Jiguang obtains reference beam after enlarging spot size, weld seam patterned light beam and reference beam are interfered on fine grain of glass substrate coating silver halide emulsion, produce interference pattern, and thickness of glass substrate is 1～1.5mm, silver halide emulsion fine grained, thickness are 6～15 μ m; After noting interference fringe, after handling through physics and chemistry again, fixing interference pattern, holographic negative completes;
(3) carry out Plastic Welding: after laser instrument sends laser beam, through a convex lens combination expansion of laser light beam and focus size, the light spot shape that the holographic negative of laser beam irradiation after spot size enlarges obtains laser beam is with to predict weld shape consistent, the composition surface of two plastics parts of laser beam irradiation finally forms weld seam.
2, the described a kind of novel method for laser welding of plastics of claim 1 is characterized in that: laser instrument adopts He-Ne laser in the step 2, and Laser Welding is selected optical fiber laser for use in the step 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100233054A CN100572034C (en) | 2007-06-08 | 2007-06-08 | A kind of novel method for laser welding of plastics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100233054A CN100572034C (en) | 2007-06-08 | 2007-06-08 | A kind of novel method for laser welding of plastics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101077624A true CN101077624A (en) | 2007-11-28 |
| CN100572034C CN100572034C (en) | 2009-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100233054A Expired - Fee Related CN100572034C (en) | 2007-06-08 | 2007-06-08 | A kind of novel method for laser welding of plastics |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101618627B (en) * | 2009-08-11 | 2012-05-02 | 湖北兴龙包装材料有限责任公司 | Method for manufacturing holographic mother board by using laser welding imposition |
| CN105109035A (en) * | 2015-09-25 | 2015-12-02 | 上海信耀电子有限公司 | Semiconductor laser synchronous welding set and operating mode thereof |
| CN106392327A (en) * | 2015-07-30 | 2017-02-15 | 福特全球技术公司 | Metal sheet laser welding clamp |
| CN115156660A (en) * | 2022-07-28 | 2022-10-11 | 新华海通(厦门)信息科技有限公司 | Auxiliary device and method for calibrating light beam in laser welding process |
-
2007
- 2007-06-08 CN CNB2007100233054A patent/CN100572034C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101618627B (en) * | 2009-08-11 | 2012-05-02 | 湖北兴龙包装材料有限责任公司 | Method for manufacturing holographic mother board by using laser welding imposition |
| CN106392327A (en) * | 2015-07-30 | 2017-02-15 | 福特全球技术公司 | Metal sheet laser welding clamp |
| CN105109035A (en) * | 2015-09-25 | 2015-12-02 | 上海信耀电子有限公司 | Semiconductor laser synchronous welding set and operating mode thereof |
| CN115156660A (en) * | 2022-07-28 | 2022-10-11 | 新华海通(厦门)信息科技有限公司 | Auxiliary device and method for calibrating light beam in laser welding process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100572034C (en) | 2009-12-23 |
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Granted publication date: 20091223 Termination date: 20120608 |