CN201070823Y - Minisize plastic shaping apparatus based on laser process - Google Patents
Minisize plastic shaping apparatus based on laser process Download PDFInfo
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- CN201070823Y CN201070823Y CNU2007200375737U CN200720037573U CN201070823Y CN 201070823 Y CN201070823 Y CN 201070823Y CN U2007200375737 U CNU2007200375737 U CN U2007200375737U CN 200720037573 U CN200720037573 U CN 200720037573U CN 201070823 Y CN201070823 Y CN 201070823Y
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Abstract
A minisize plastic piece figuration device based on the laser processing relates to the special type processing minisize figuration field. The device comprises a Nd:YAG laser, a CO2 laser, a reflector, a lasher concussion control computer, a heating control computer, a beam guiding and beam splitting system, a restraint layer, a coat, a die mold, a lower die, a worktable and a rotatory reflector. The Nd:YAG laser is connected with the reflector, the rotatory reflector, and the beam guiding and beam splitting system in turn by an optical fiber, the die mold is positioned in the lower die, the lower die is fixed on the worktable and positioned just below the beam guiding and beam splitting system, and the coat and the restraint layer are positioned at the upper part of the die mold. The CO2 laser, the reflector, the rotatory reflector and the beam guiding and beam splitting system form an access which is positioned below the worktable and is just against the lower die. The lasher concussion control computer and the heating control computer control the Nd:YAG laser and the CO2 laser separately. The cost of the laser processing in the utility model is low, and the cycle of manufacture is short, so the minisize plastic piece with high quality can be produced rapidly.
Description
Technical field
The utility model patent relates to the little shaping of special process field, refer in particular to a kind of micro plastic spare building mortion based on Laser Processing, it is a kind of novel plastic building mortion that laser-impact and laser heating technique are merged, can realize the little shaping and the high efficiency processing of plastics, and overcome the low problem of traditional miniature machining accuracy.
Background technology
Little shaping is a development trend of plastics forming, and micro plastic is widely used in precision instrument and the electronic instrument.In the method for traditional little plastics forming, injection moulding can obtain higher precision, such as, the micro-injection molding machine that the STEAG company of Dortmund, Germany produces can be produced the gear that tooth depth is 2um.But the process of traditional micro injection molding is generally by reinforced, plasticizing, be injected into mould, pressurize, six steps of the cooling and the demoulding are formed, and technology is comparatively complicated, also very high to equipment, dimensional effect and friction behavior all make plastics performance that bigger change is arranged, and still adopt common heating means to be difficult to the uniformity that guarantees that plastics are heated in the plasticizing process, and the long change that causes the plastics inner composition easily heat time heating time.In injection, the temperature difference of mould and softening plastics can cause that the flowability of plastics descends; The pressure that tradition that the most key is is injected into mold technique is general bigger, can't accurately satisfy the needed slight pressure of little processing.In addition, too fast at the cooling procedure medium velocity, cause be shaped back surface of the work performance difference and internal flaw easily, the existence of residual stress is the dimensional accuracy of heavy damage workpiece also.How designing a running gate system, to finish injection be exactly a very complicated problems, the cooling of mold cores also is difficult to the requirement that obtains processing.
More advanced little forming technology has LIGA at present, electric machining, powder sintered, methods such as hot forming, new technology provides technical foundation for the manufacturing of micro-injection moulding mould, the LIGA manufacturing technology can produce the workpiece that appearance and size is 3-1100um abroad, and LIGA technology relates to following process: the X ray etching, electricity calibration moulding and moulding, but the mould structure side must have good drawing-die angle, add the particularity of plastics, therefore can influence the quality of processing, in addition, the parameter in the photoetching process is set comparatively complicated, manufacturing time is long, the cost height, and the output of machining energy is not enough, so be difficult to form large-scale production.
Recently, the LSF The Application of Technology also reaches its maturity both at home and abroad, Japan Tsuyoshi Masumoto applies for a patent: the forming technology of Formingprocess of amorphous alloy material amorphous alloy material, approval number is US5324368, its principle is that application oil bath or heating furnace heat material, and as forming force amorphous material is carried out little shaping with hydrostatic pressure.Chinese patent 200510010099.4,03132554.8 has been reported and has been utilized Electric heating to carry out carrying out micro-plasticity forming after the indirect of small workpiece.People such as the domestic Zhang Yongkang of Jiangsu University achieve success in the experiment of the laser impact forming of metal blank, and the irradiation that prove laser can produce impulsive force to metal makes metal generation plastic deformation, and the energy of impulsive force is controlled.But the utilization of laser impact forming is in the macroscopic view manufacturing mostly at present, the material processed compacting mechanism is just plastic deformation mostly also, and processing mostly is metal blank, seldom relates to plastics, makes the scope of laser impact forming also have bigger application space.
Generally speaking, because the particularity of miniature plastic, of paramount importance two machined parameters are accurately to obtain small power and forming temperature.Traditional processing technology can not satisfy the modern production requirement gradually, so must need us to utilize some modern processing methods to go to realize quick little shaping of plastics.
Summary of the invention
The purpose of this utility model provides a kind of micro plastic spare building mortion based on Laser Processing, and it is by Nd:YAG laser instrument, CO
2Laser instrument, speculum, laser-impact are controlled computer and are added thermal control computer, leaded light and beam splitting system, restraint layer, coating, pressing mold, die, workbench, rotating mirror composition; The Nd:YAG laser instrument by optical fiber successively with speculum, rotating mirror, leaded light and beam splitting system are connected, pressing mold is positioned at die, die is fixed on the workbench, be positioned at leaded light and beam splitting system under, the top of pressing mold is followed successively by coating and restraint layer; CO
2Laser instrument and speculum, rotating mirror, leaded light beam splitting system are formed a path, and the position faces die below workbench; Laser-impact is controlled computer and is added the thermal control computer and controls Nd:YAG laser instrument and CO respectively
2Laser instrument.The utility model has mainly utilized the pressure of laser-impact generation and the heat that the laser irradiated plastics produces, and obtains the condition that plastics forming needs.
It is the laser instrument of 1.06 μ m that the Nd:YAG laser instrument can be selected wavelength for use, pulse power 25J, spot diameter 8mm.CO
2Laser power is generally 5-40J, and coating needs higher laser adsorption capacity, can adopt pitch-dark material; Restraint layer needs certain rigidity, can adopt K9 glass; Die material will have certain rigidity, can adopt 45
#Steel; Laser-impact control computer and the output that adds thermal control computer control laser obtain impacting and heating desired laser power and irradiation time.
Main purpose of the present utility model is to obtain suitable heat and pressure by the power output of computer controlled laser, therefore can overcome the excessive drawback of injection force in the traditional injection moulding processing, because the temperature difference of mould and workpiece is little in the time of LASER HEATING, so can make that residual stress is reduced to minimum degree; The cost of Laser Processing is much smaller than LIGA, and the cycle of making is short, and easily by computer control, uses and make good micro-mould, just can produce high-quality micro plastic spare fast.
According to the function needs of design, this device has two to be subjected to computer-controlled laser instrument, can produce different wavelength of laser, and the position is respectively at the upper and lower of mould.In addition, prepare the plastics blank of a plate shape, be placed on the die, die is main mould, and as female sample of plastics forming, and the material require of die is can see through infrared ray and have certain rigidity.The long laser of wavelength is absorbed by plastics easily, so utilize the CO of die below
2Laser instrument produces infrared laser plastics is heated.Corresponding with master mold is pressing mold, and pressing mold is positioned over the die top, and pressing mold must have certain degree of hardness and hear resistance.At the pressing mold upper surface coating is arranged, coating is also referred to as restraint layer and uses as sacrifice layer, can increase the absorption and the protection pressing mold of laser.When infrared ray laser softens plastics through die, Nd:YAG short-wavelength laser by the pressing mold top is imported high energy laser to stamper surface, and the stamper surface coating is gasified rapidly, forms plasma and blast, produce high-pressure shocking wave, move to die thereby promote pressing mold.Pressing mold will have certain seal with cooperating of die, and the frictional force between motion is as far as possible little mutually, to reduce laser-impact pressure.
According to the functional requirement of design, this device can also be realized the function of powder metallurgy, and can improve the quality of powder metallurgy, obtains small structure.Fill the rapidoprint powder of some in die, the quantity of powder is comparatively accurate by calculating, and utilizes the CO of die below
2Laser instrument carries out sintering, constantly utilizes the Nd:YAG short-wavelength laser above the pressing mold to impact pressing mold in the process of sintering; Obtain being similar to the effect of pressed compact sintering.
The release method of two kinds of processing, because the surface strength of working of plastics is lower, the little employing push rod extrusion method that is fit to blows out method so the method that adopts is all air-flow.
According to designing requirement, two laser instruments of this device have several delivery nozzles respectively, have several moulds simultaneously on workbench, can process a plurality of workpiece simultaneously, finish batch process.
Description of drawings
Fig. 1 is total processing schematic diagram of the present utility model
Fig. 2 is based on the micro plastic spare forming technology flow chart of Laser Processing
The 1:Nd:YAG laser instrument, 2: speculum, 3: laser-impact control computer, 4: leaded light and beam splitting system, 5: rotating mirror, 6: restraint layer, 7: coating, 8: pressing mold, 9: the plastics blank, 10: die, 11: workbench, 12: demoulding hole, 13: leaded light and beam splitting system, 14: rotating mirror, 15: speculum, 16:CO
2Laser instrument, 17: add the thermal control computer
The specific embodiment
Each parts relative position relation of the present utility model as shown in Figure 1, whole device is made up of 17 critical pieces.Implementation process is specific as follows, and to be of a size of Ф 60 μ m * 100 μ m be example to process a simple semicolumn working of plastics.
At first be the placement of workpiece, pressing mold 8 is separated certain position with die 10, guarantee that the plastics blank 9 of rectangular shape can be placed smoothly.Plastics blank 9 is placed on the die 10, it is smooth as far as possible clean that plastics blank 9 must have higher infrared laser absorptivity and a surface again, pressing mold (8) is placed on it face after placing plastics blank 9, needs not have the gap contact between the two.
According to top described, again in pressing mold 8 upper surface seal coats 7, pressing mold 8 mainly bears laser-impact pressure, 7 pairs of laser of coating have high-absorbility and can due care pressing mold 8, prolong the service life of pressing mold, it is 100 μ m that coating 7 adopts pitch-dark material thickness, and pressing mold 8 materials are 45 steel with hear resistance and higher hardness; Restraint layer 6 is installed on coating 7 then, and what restraint layer 6 adopted is K9 glass, and thickness is 0.8mm, and the shock wave pressure that produces in the time of can increasing laser-impact is determined to be fixed on the die 10 behind the installation site.
Enter the heating period then, open CO
2Laser instrument 16, laser sees through die 10 and shines plastics blank 9 by speculum 15 and leaded light and beam splitting system 13, adds thermal control computer (17) this moment according to the heating needs, the desired laser power of control laser output heating is 20J, and irradiation time is 2S; Speculum 15 make laser can vertical irradiation to plastics blank 9.The material that die 10 adopts is the very high crome metal of infrared ray transmitance, guarantees that infrared laser sees through 10 pairs of plastics blanks 9 of die and directly heats.Because the concentration of energy and plastics blank 9 volumes of LASER HEATING are little, so just can soften in the time of 2S, in addition, die 10 is the absorption portion heat also, makes itself and the workpiece temperature difference less, and the transformation of ownership of plastics is fine.To reach processing required when heating, adds thermal control computer (17) and close or reduce CO
2The output energy of laser instrument 16.
Be the punching press stage then, when plastics blank 9 reaches the required flowability of processing after heating, open Nd:YAG laser instrument 1, laser is by speculum 2, and through leaded light and beam splitting system 4, under the control of impacting control computer 3, vertical deflection angle that the laser acquisition needs and the laser power of 25J, leaded light and beam splitting system 4 penetrate laser; See through the coating 7 that restraint layer 6 shines pressing mold 8 surfaces, produce plasma and blast, shock wave promotes pressing mold 8 to die 10 motions, and the attack time is a laser pulse 23ns, makes the plastics blank 9 of fusing fill up die 10.
At last, after obtaining semi-cylindrical form, the time of cooling 1min, by demoulding hole 12, plastics part is blown out with air-flow, just obtain the finished product of semi-cylindrical form.
In above process, the size of 1 pair of pressing mold 8 impulsive force of Nd:YAG laser instrument can control computer 3 changes laser pulse and energy obtains by impacting, and also is the key component of this device.Can overcome the defective that can't accurately obtain small power in the tradition processing.In addition, at CO
2In the time of laser instrument 16 heating appropriateness, just can carry out impact immediately, save the time, improve production efficiency.
The quantity of mould has several, and is fixed on above the workbench 11, thereby processing when can realize a plurality of workpiece obtains good production efficient.
The characteristics of the utility model maximum are to take full advantage of different processing characteristics and the different mechanism of action of laser, cooperate a plurality of Mould is processing work simultaneously, can realize the batch machining of miniature plastic part, satisfies the little accurate demand of making of modern plastics.
Claims (4)
1. the micro plastic spare building mortion based on Laser Processing is characterized in that: by Nd:YAG laser instrument (1), CO
2Laser instrument (16), speculum (2), laser-impact are controlled computer (3) and are added thermal control computer (17), leaded light and beam splitting system (4), restraint layer (6), coating (7), pressing mold (8), die (10), workbench (11), rotating mirror (5) composition; Nd:YAG laser instrument (1) by optical fiber successively with speculum (2), rotating mirror (5), leaded light and beam splitting system (4) are connected, pressing mold (8) is positioned at die (10), die (10) is fixed on the workbench (11), be positioned at leaded light and beam splitting system (4) under, the top of pressing mold (8) is followed successively by coating (7) and restraint layer (6); CO
2Laser instrument (61) is formed a path with speculum (2), rotating mirror (5), leaded light beam splitting system (4), and the position faces die (10) in workbench (11) below; Laser-impact is controlled computer (3) and is added thermal control computer (17) and controls Nd:YAG laser instrument (1) and CO respectively
2Laser instrument (16).
2. a kind of micro plastic spare building mortion based on Laser Processing according to claim 1 is characterized in that: it is the laser instrument of 1.06 μ m that Nd:YAG laser instrument (1) is selected wavelength for use, pulse power 25J, spot diameter 8mm.
3. a kind of micro plastic spare building mortion based on Laser Processing according to claim 1 is characterized in that: CO
2Laser instrument (16) laser power is 5-40J.
4. a kind of micro plastic spare building mortion according to claim 1 based on Laser Processing, it is characterized in that: coating adopts pitch-dark material; Restraint layer adopts K9 glass; Die material adopts 45
#Steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200375737U CN201070823Y (en) | 2007-05-21 | 2007-05-21 | Minisize plastic shaping apparatus based on laser process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200375737U CN201070823Y (en) | 2007-05-21 | 2007-05-21 | Minisize plastic shaping apparatus based on laser process |
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| CN201070823Y true CN201070823Y (en) | 2008-06-11 |
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| CNU2007200375737U Expired - Fee Related CN201070823Y (en) | 2007-05-21 | 2007-05-21 | Minisize plastic shaping apparatus based on laser process |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102962583A (en) * | 2012-11-28 | 2013-03-13 | 江苏大学 | Method and device for forming plastic part microstructure based on laser heating |
| CN103042651A (en) * | 2012-12-13 | 2013-04-17 | 江苏大学 | Micro-injection moulding method based on laser plasticizing and impacting technology and apparatus |
| CN104772569A (en) * | 2015-04-03 | 2015-07-15 | 山东科技大学 | Laser impact micro forming device and micro forming process thereof of medical titanium alloy plate |
| CN108558188A (en) * | 2018-06-19 | 2018-09-21 | 深圳光韵达光电科技股份有限公司 | A kind of curve glass forming apparatus and forming method |
| CN112811795A (en) * | 2021-01-07 | 2021-05-18 | 长春理工大学 | Laser heating micro-nano photonics device mould pressing processing device and method |
-
2007
- 2007-05-21 CN CNU2007200375737U patent/CN201070823Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102962583A (en) * | 2012-11-28 | 2013-03-13 | 江苏大学 | Method and device for forming plastic part microstructure based on laser heating |
| CN103042651A (en) * | 2012-12-13 | 2013-04-17 | 江苏大学 | Micro-injection moulding method based on laser plasticizing and impacting technology and apparatus |
| CN103042651B (en) * | 2012-12-13 | 2015-02-04 | 江苏大学 | Micro-injection moulding method based on laser plasticizing and impacting technology and apparatus |
| CN104772569A (en) * | 2015-04-03 | 2015-07-15 | 山东科技大学 | Laser impact micro forming device and micro forming process thereof of medical titanium alloy plate |
| CN104772569B (en) * | 2015-04-03 | 2017-11-14 | 山东科技大学 | The laser-impact micro-forming device and its microsecond delay technique of a kind of medical titanium alloy plate |
| CN108558188A (en) * | 2018-06-19 | 2018-09-21 | 深圳光韵达光电科技股份有限公司 | A kind of curve glass forming apparatus and forming method |
| CN112811795A (en) * | 2021-01-07 | 2021-05-18 | 长春理工大学 | Laser heating micro-nano photonics device mould pressing processing device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080611 |