CN108515703A - Transparent plastic welding method - Google Patents
Transparent plastic welding method Download PDFInfo
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- CN108515703A CN108515703A CN201810278796.5A CN201810278796A CN108515703A CN 108515703 A CN108515703 A CN 108515703A CN 201810278796 A CN201810278796 A CN 201810278796A CN 108515703 A CN108515703 A CN 108515703A
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- Prior art keywords
- transparent plastic
- transparent
- laser
- cooling fin
- welding method
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- 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
-
- 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
- B29C65/1632—Laser beams characterised by the way of heating the interface direct heating the surfaces to be joined
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- Toxicology (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The present invention relates to a kind of transparent plastic welding methods, and the method comprising the steps of：Two clarity plastic layers to be welded are stacked and are set；Cooling fin is covered on the transparent plastic in upper layer；It is that the laser of 1700nm~2000nm penetrates cooling fin and in the transparent plastic on upper layer successively, and focuses on the joint surface of two transparent plastics to use wavelength, and two transparent plastics are welded together.In the transparent plastic welding method of the present invention, wavelength is used to be welded to transparent plastic for the laser of 1700nm~2000nm, there is lower light transmittance to the laser that wavelength is 1700nm~2000nm using transparent plastic, so that when being welded to transparent plastic, absorbent need not be added, to improve welding efficiency；Meanwhile being radiated to the transparent plastic in upper layer using cooling fin, the transparent plastic temperature to avoid upper layer is excessively high and scaling loss.
Description
Technical field
The present invention relates to transparent plastic welding procedures, more particularly to a kind of transparent plastic welding method.
Background technology
Plastic quality is light, and ability resistant to chemical etching is strong, and impact resistance is good, has good insulating properties and wearability, manufacture
It is at low cost, it is readily processible to different shapes.Plastic applications are extensive, such as product packaging, daily product, tubing.
Transparent plastic is widely used in illuminating equipment, optical instrument, resin glass, optical fiber material due to its higher translucency
The fields such as material, optical disk materials, transparent enclosure.For special field such as optics contact lenses, fiber optic materials and medical
Plastics etc., it is high to the purity requirements of plastics.Traditional transparent plastic welding manner is ultrasonic bonding, friction welding, shakes
Dynamic welding, hot plate welding, hot gas welding, implantation welding.Ultrasonic bonding, friction welding, Vibration Welding be although simple for process, again
Renaturation is strong, but easy to produce clast, the marking etc., reduce the cleanliness factor and translucency of transparent plastic.Likewise, hot plate welding,
Hot gas welding, implantation welding not only require height to operating personnel, but also are easily destroyed the consistency and transparency of plastics.Therefore,
There is an urgent need for a kind of novel reliable welding manners to meet the welding requirements of transparent plastic.Laser welding is as a kind of advanced, non-
Contact type welding technology makes possible.
However, taking traditional transparent plastic laser welding process, need to coat such as on transparent plastic in welding process
The absorbents such as clearweld increase the complexity and cost of welding process.
Invention content
Based on this, it is necessary to provide a kind of transparent plastic welding method, solve conventional transparent plastics laser welding and need to inhale
It receives agent and influences welding efficiency problem.
A kind of transparent plastic welding method, the method comprising the steps of：
Two clarity plastic layers to be welded are stacked and are set；
Cooling fin is covered on the transparent plastic in upper layer；
Wavelength is used to penetrate the cooling fin successively for the laser of 1700nm~2000nm and in the transparent plastic on upper layer,
And the joint surface of two transparent plastics is focused on, two transparent plastics are welded together.
In a wherein embodiment, the joint surface that two transparent plastics are focused in the laser is welded
When, in surface-pressure of the cooling fin far from the transparent plastic.
In a wherein embodiment, the material of the transparent plastic is selected from polyamide, copolyester and makrolon
In one kind or above-mentioned polymer monomer at least two copolymer.
In a wherein embodiment, the wavelength of the laser is 1940nm, power 30W, and with 2mm/s~4mm/
The speed of s welds the transparent plastic.
In a wherein embodiment, during the laser welds the transparent plastic, pass through fixture
The cooling fin and two transparent plastics are fixed.
In a wherein embodiment, the material of the cooling fin is quartz glass.
In a wherein embodiment, the ir transmissivity of the quartz glass is under 1700nm~2000nm wavelength
95% or more.
In a wherein embodiment, the cooling fin is 1~1.2W/mK in 150~200 DEG C of thermal coefficient,
And 5% is not higher than to the absorption loss of the laser.
In a wherein embodiment, the ir transmissivity of two transparent plastics is under 1700nm~2000nm wavelength
It is 65%~75%.
In a wherein embodiment, the material identical of two transparent plastics.
A kind of transparent plastic welding method provided by the invention, it is the laser of 1700nm~2000nm to transparent to use wavelength
Plastics are welded, and have lower light transmittance to the laser that wavelength is 1700nm~2000nm using transparent plastic so that
When being welded to transparent plastic, absorbent need not be added, to improve welding efficiency；Meanwhile using cooling fin to being in
The transparent plastic on upper layer radiates, and the transparent plastic temperature to avoid upper layer is excessively high and scaling loss.
Description of the drawings
Fig. 1 is the step flow chart of transparent plastic welding method in an embodiment；
Fig. 2 is welding schematic diagram when laser welds transparent plastic in an embodiment；
Fig. 3 is the welding effect pair when laser respectively welds transparent plastic with 1mm/s and 2mm/s in an embodiment
Than；
Fig. 4 is the section of weld joint figure of an embodiment transparent plastic.
Specific implementation mode
To facilitate the understanding of the present invention, below with reference to relevant drawings to invention is more fully described.In attached drawing
Give the better embodiment of the present invention.But the present invention can realize in many different forms, however it is not limited to herein
Described embodiment.On the contrary, the purpose of providing these embodiments is that making to understand more the disclosure
Add thorough and comprehensive.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein "inner", "outside", "left", "right" and
Similar statement for illustrative purposes only, is not offered as being unique embodiment.
Refering to fig. 1 and Fig. 2, a kind of transparent plastic welding method in an embodiment, the method comprising the steps of：
Two transparent plastics 21,22 to be welded are laminated and place by step S110；
Step S120 covers cooling fin 23 on the transparent plastic 22 in upper layer；
Step S130 uses wavelength to penetrate cooling fin 23 successively for the laser L of 1700nm~2000nm and in upper layer
Transparent plastic 22, and the joint surface c of two transparent plastics 21,22 is focused on, two transparent plastics 21,22 are welded together.
In the embodiment, wavelength is used to be welded to transparent plastic 21,22 for the laser L of 1700nm~2000nm
When, since light transmittance of the transparent plastic 21,22 in the wave-length coverage is relatively low.For example, being for the laser L of 1940nm with wavelength
Example, selection are respectively in the light transmittance at that wavelength of transparent plastic 21,22 of polyamide, copolyester and makrolon
70%, 42% and 72%.Low-transmittance shows that the laser L of 21,22 pairs of wave-length coverages of transparent plastic has higher absorptivity,
When to be welded to transparent plastic 21,22 using the laser L of the wave-length coverage, without adding absorbent, it is only necessary to by the wave
The laser L of long range focuses on two transparent plastics 21,22 in joint surface c, and transparent plastic 21,22 will absorb laser energy and melt
Change, and links together after cooling.In addition, in the embodiment, cooling fin is covered on the transparent plastic 22 in upper layer
23, when being welded to L pairs of two transparent plastics 21,22 of laser, cooling fin 23 can play preferable heat dissipation effect, effectively keep away
Exempt from the transparent plastic 22 on upper layer scaling loss due to temperature is higher by fusing point.
It is remote in cooling fin 23 when the joint surface c that laser L focuses on two transparent plastics 21,22 is welded in step S130
The surface-pressure of transparent plastic 22 from upper layer absorbs so that cooling fin 23 and the transparent plastic 22 on upper layer fit closely
The heat of the transparent plastic 22 on upper layer, the problem of eliminating the 22 surface melting scaling loss of transparent plastic on upper layer.In addition, cooling fin 23
To compressing for the transparent plastic 22 on upper layer so that two transparent plastics 21,22 are closely affixed without swollen because being heated in welding process
Swollen, weld seam is relatively smooth smooth at the final joint surface c made between two transparent plastics 21,22.
In some embodiments, the ir transmissivity of two transparent plastics 21,22 is under 1700nm~2000nm wavelength
65%~75%, to ensure that transparent plastic 21,22 has preferable assimilation effect in the wave-length coverage to laser energy, together
When, also maintain transparent plastic 21,22 preferable transparent effects.
The one kind or above-mentioned polymer of the material of transparent plastic 21,22 in polyamide, copolyester and makrolon
Monomer at least two copolymer can effectively make transparent while ensuring the cleanliness factor of transparent plastic 21,22
The laser L that 21,22 pairs of wavelength of plastics are 1700nm~2000nm has preferable assimilation effect, to without using absorbent
In the case of can weld together.
The material identical of two transparent plastics 21,22 so that welding effect is more well-balanced, will not transparent plastic 21,
Aberration is formed between 22.
In some embodiments, it during laser L welds transparent plastic 21,22, can be incited somebody to action by fixture
Cooling fin 23 and two transparent plastics 21,22 are fixed.On the one hand, when preventing transparent plastic 21,22 from welding due to shifting
Cause welding effect bad；On the other hand, using the clamping force of fixture effectively make cooling fin 23 and two transparent plastics 21,
It being closely affixed between 22 so that weld seam is relatively smooth smooth, and cooling fin 23 and 22 bearing surface of transparent plastic on upper layer are more uniform,
Improve heat dissipation effect.
It should be noted that in the above embodiment, the swashing in 1700nm~2000nm wavelength of transparent plastic 21,22 is utilized
There is lower transmissivity so that transparent plastic 21,22 can effectively absorb laser without using absorbent under light L
Energy.Meanwhile needing timely to radiate to the transparent plastic 22 on upper layer using cooling fin 23, by the transparent plastic 22 on upper layer
Temperature be maintained at a below the level of its fusing point always, it is excessively high and lead to scaling loss to avoid temperature.It can be seen that radiating
When the selection of piece 23, two aspect factors are considered：First, cooling fin 23 needs to have preferable infrared transmission performance, with to the greatest extent
It is likely to reduced energy loss when laser L is passed through；Second, cooling fin 23 needs have preferable heat conductivility, with quickly right
The transparent plastic 22 on upper layer radiates, and avoids 22 temperature of transparent plastic on upper layer excessively high with this.As in the present embodiment, dissipate
Backing 23 is 1~1.2W/mK in 150~200 DEG C of thermal coefficient, and is not higher than 5% to the absorption loss of laser L.
Specifically, the selection of cooling fin 23 includes mainly the quartzy class glass material containing SiO2, the germanic acid salt containing GeO2
Glass material, sulfide-based glass material and the chalcogenide glass material that glass material, the aluminate class containing Al2O3 aoxidize.
These materials all have preferable heat dissipation performance.In view of material is the penetrability of the laser L of 1700nm~2000nm to wavelength,
In present embodiment, the material of cooling fin 23 is quartz glass, and the ir transmissivity of quartz glass is in 1700nm~2000nm waves
It is 95% or more under long, when to be radiated to the transparent material on upper layer using the quartz glass, quartz glass will not be a large amount of
Absorption laser energy so that when the joint surface c of incident two transparent plastics 21,22 of laser light quartz glass, energy damage
Consumption is smaller, and then laser energy is absorbed by transparent plastic 21,22 as far as possible, and two transparent plastics 21,22 are finally welded on one
It rises.
In conjunction with shown in Fig. 3, weldering that Fig. 3 shows laser L when being welded respectively to transparent plastic 21,22 with 1mm/s and 2mm/s
Connect Contrast on effect.
Specifically, after laser L focuses on the joint surface c between two transparent plastics 21,22, welded along straight path
It connects, the wavelength of used laser L is 1940nm, power 30W.When speed of welding is 1mm/s, weld seam a is formed1.Accordingly
, when speed of welding is 2mm/s, form weld seam a2.From the figure 3, it may be seen that weld seam a1Tail portion there is bubble b, this is because welding
At the end of termination process, weld seam tail portion is in high temperature melt state, and high molecular material is decomposed, gas can not shed in time and
It remains in weld seam.And weld edge cooling is very fast, thus, at the end of cooling, remaining gas is just formed in the inside of weld seam
Bubble b.In comparison, when accelerating speed of welding to 2mm/s, the weld seam a of formation2In, bubble-free generates, it is seen then that right
When transparent plastic 21,22 is welded, can be avoided by way of accelerating speed of welding the tail portion of weld seam there is bubble and
Cause weld defect.
In some embodiments, transparent plastic 21,22 is welded using the speed of 2mm/s~4mm/s, to have
The tail portion of effect avoided in welding process in weld seam generates bubble, while it is too fast to also avoid speed of welding, transparent plastic 21,22
The laser energy of absorption is very little and influences welding quality.
In conjunction with shown in Fig. 4, the lateral cross section form of the weld seam a at the joint surface c of two transparent plastics 21,22 is oval,
It can be seen that laser L is focused at the joint surface c of two transparent plastics 21,22 when being welded, two transparent plastics 21,22 can be uniform
Absorption laser energy and melt, and weld together after the cooling period.In addition, as seen from Figure 4, using present embodiment
When welding method welds transparent plastic, the weld seam a leaving no air bubbles insides after welding, clast, and the transparent plastic 22 on upper layer
It is completely fused together with the transparent plastic 21 of lower layer, welding effect is preferable.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of transparent plastic welding method, which is characterized in that the method comprising the steps of：
Two clarity plastic layers to be welded are stacked and are set；
Cooling fin is covered on the transparent plastic in upper layer；
It is that the laser of 1700nm~2000nm penetrates the cooling fin and in the transparent plastic on upper layer successively, and gathers to use wavelength
Coke welds together two transparent plastics in the joint surface of two transparent plastics.
2. transparent plastic welding method according to claim 1, which is characterized in that it is described to focus on two in the laser
When the joint surface of bright plastics is welded, in surface-pressure of the cooling fin far from the transparent plastic.
3. transparent plastic welding method according to claim 1, which is characterized in that the material of the transparent plastic is selected from poly-
One kind in amide, copolyester and makrolon or at least two copolymer in the monomer of above-mentioned polymer.
4. transparent plastic welding method according to claim 1, which is characterized in that the wavelength of the laser be 1940nm,
Power is 30W, and is welded to the transparent plastic with the speed of 2mm/s~4mm/s.
5. transparent plastic welding method according to claim 1, which is characterized in that the laser to the transparent plastic into
During row welding, the cooling fin and two transparent plastics are fixed by fixture.
6. according to claim 1-5 any one of them transparent plastic welding methods, which is characterized in that the material of the cooling fin
For quartz glass.
7. transparent plastic welding method according to claim 6, which is characterized in that the ir transmissivity of the quartz glass
It is 95% or more under 1700nm~2000nm wavelength.
8. transparent plastic welding method according to claim 1, which is characterized in that the cooling fin is at 150~200 DEG C
Thermal coefficient is 1~1.2W/mK, and is not higher than 5% to the absorption loss of the laser.
9. transparent plastic welding method according to claim 1, which is characterized in that the infrared transmission of two transparent plastics
Rate is 65%~75% under 1700nm~2000nm wavelength.
10. transparent plastic welding method according to claim 9, which is characterized in that the material phase of two transparent plastics
Together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810278796.5A CN108515703A (en) | 2018-03-30 | 2018-03-30 | Transparent plastic welding method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810278796.5A CN108515703A (en) | 2018-03-30 | 2018-03-30 | Transparent plastic welding method |
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| CN108515703A true CN108515703A (en) | 2018-09-11 |
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| CN201810278796.5A Pending CN108515703A (en) | 2018-03-30 | 2018-03-30 | Transparent plastic welding method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109353012A (en) * | 2018-10-30 | 2019-02-19 | 大族激光科技产业集团股份有限公司 | The method and plastic products of plastic welding laser |
| CN110077000A (en) * | 2019-04-04 | 2019-08-02 | 欧声焊接科技(常州)有限公司 | A kind of welder and method of fluid channel transparent plastic |
| CN110535020A (en) * | 2019-09-09 | 2019-12-03 | 山东大学 | A kind of optical parametric oscillator welded for transparent or white plastic |
| CN110774515A (en) * | 2019-10-08 | 2020-02-11 | 华中科技大学 | Method for manufacturing thick-wall transparent plastic part by sequential welding |
| CN111113910A (en) * | 2018-10-31 | 2020-05-08 | 大族激光科技产业集团股份有限公司 | Laser welding method and laser welding device thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109353012A (en) * | 2018-10-30 | 2019-02-19 | 大族激光科技产业集团股份有限公司 | The method and plastic products of plastic welding laser |
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| CN111113910A (en) * | 2018-10-31 | 2020-05-08 | 大族激光科技产业集团股份有限公司 | Laser welding method and laser welding device thereof |
| CN110077000A (en) * | 2019-04-04 | 2019-08-02 | 欧声焊接科技(常州)有限公司 | A kind of welder and method of fluid channel transparent plastic |
| CN110535020A (en) * | 2019-09-09 | 2019-12-03 | 山东大学 | A kind of optical parametric oscillator welded for transparent or white plastic |
| CN110774515A (en) * | 2019-10-08 | 2020-02-11 | 华中科技大学 | Method for manufacturing thick-wall transparent plastic part by sequential welding |
| CN110774515B (en) * | 2019-10-08 | 2021-04-20 | 华中科技大学 | Method for manufacturing thick-wall transparent plastic part by sequential welding |
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