The manufacturing method of Fresnel Lenses, ejection shaping die device used and phenanthrene obtainedNie Er lensTechnical field
The present invention relates to a kind of manufacturing method of Fresnel Lenses, ejection shaping die device used and Fresnels obtainedLens, in particular to ejection shaping die device used and obtained when a kind of manufacturing method of Fresnel Lenses, manufactureFresnel Lenses.
Background technique
The characteristics of Fresnel Lenses is also known as Fresnel lens, optical characteristics is that focal length is short, and material-saving more than general lensAnd it is more light and handy.Compared to the lens design of more early stage, Fresnel Lenses is thinner, therefore can transmit more light quantities, therefore, lightIt, can be more effectively by a light directive distant place after source is through Fresnel Lenses refraction.
Fresnel Lenses widely should project range light, the camera lens of transparency projector, rear-projection display device in beaconIt is the most commonly used lens of purposes on screen and automobile headlamp.
Most of optical lenses are made now with the method mating mold of ejection formation, and traditional Fresnel Lenses is also mainIt is produced by this method, it is however generally that, Fresnel Lenses is to be added thermoplastic by an ejection shaping die machineWork molding.However, existing Fresnel Lenses mold, because mold heating is slow, the temperature height at each position of mold is uneven, leads to heatThe speed speed that thermoplastic plastic flows in mould cavity is different, thus forming period is too long, causes to be easy in injection moulding processThe surface of Fresnel Lenses generates defect current mark, gas line, and the surface of Fresnel Lenses is finally enabled to be unable to reach light microscopic face sufficiently highEffect.Further, since temperature of each position of mold in processing is uneven, the leading cooling forming of the lower plastic material of temperature,Cause the sharp position of Fresnel Lenses to generate the short of insufficient fill and penetrates (Short Shot) defect, and it is this kind of containing short defect of penetratingThe problem of also assembling with stress inside Fresnel Lenses, and then optical imagery is influenced, seriously affect the quality of Fresnel LensesAmount.
Figure 18 is please referred to, Figure 18 is above-mentioned with the short traditional Fresnel Lenses 90 for penetrating defect, in the sawtooth portion in its sectionTip 91 and adjacent saw-tooth portion between chase 92 due to plastic material lack of fill in the electronics of 15 times of optical magnificationsIt is obtuse that fillet has been presented under microscope, rather than ideal tip shape.
Up to now, industry not yet passes any processing method and produces and has in more than 15 times optical magnificationsElectron microscope under still present tip shape Fresnel Lenses sawtooth portion and chase.
Summary of the invention
The present inventor is in view of the existing ejection shaping die machine for manufacturing Fresnel Lenses and processing method in ejection formationIn the process because caused by each position of mold is uneven in temperature its die cavity be locally filled with deficiency, cause the sawtooth portion point of Fresnel Lenses finished productAcutance is insufficient and the disadvantages of influence optical quality, it is insufficient with missing to improve its, and then create a kind of system of Fresnel LensesMake ejection shaping die device and Fresnel Lenses obtained used when method, manufacture.
Present invention is primarily aimed at provide the manufacturing method of Fresnel Lenses a kind of, ejection shaping die device used andFresnel Lenses obtained.The manufacturing method is to enable modeling and carrying out the processing step of rapid heat cycle to thermoplastic materialMaterial material can be fully filled in the depression in mold, use the Fresnel Lenses for making to produce on the tip in sawtooth portion andStructure sharp keen enough is generated in chase, and the surface of Fresnel Lenses is made to have the effect of bloom mirror surface, to promote luxuriant and rich with fragrance aluniteThe optical quality of your lens.
In order to achieve the above object, the manufacturing method of the Fresnel Lenses of the invention using rapid heat cycle mode includes following stepIt is rapid:
One rapid heating step injects high fever at least die waterway in Fresnel Lenses ejection shaping die deviceFluid is be heated rapidly to the flowable temperature of thermoplastic material；
One projects step, injects liquid thermoplastic plastics in one die cavity into the Fresnel Lenses ejection shaping die deviceMaterial；
One transfer step, liquid thermoplastic plastic material pressurization of at least a pair of of the mode of use into the die cavity, so that the heatPlastic plastic material generates Fresnel lens structure；And
One fast cooling forming step changes to inject to the die waterway in the Fresnel Lenses ejection shaping die deviceCryogen is with the liquefied thermoplastic material that is quickly cooled down in the die cavity and is allowed to cool solidification, forms Fresnel Lenses.
Fresnel Lenses ejection shaping die device of the present invention and relevant manufacturing method use the first die waterway andSecond die waterway is injected for heat steam, hot water or cold water wherein, so that the master mold quickly and uniformly be heated or cooledTool and male mould, this goes up and down the temperature at each position of the plastic material in die cavity quickly, evenly and uniformly, is avoided being moldedProcess time is too long and the surface of Fresnel Lenses is caused to generate defect current mark, gas line, in addition, uniform temperature control can avoid thermoplasticProperty plastic material parts cool and solidify in advance and cause it is short penetrate phenomenon, therefore the sharp keen of the sharp position of Fresnel Lenses can be promotedDegree, to promote the optical quality of Fresnel Lenses.
In one embodiment of this invention, foregoing mould water route refers in the Fresnel Lenses ejection shaping die deviceThe first die waterway in one master tooling.
In one embodiment of this invention, foregoing mould water route refers in the Fresnel Lenses ejection shaping die deviceThe second die waterway in one male mould.
In one embodiment of this invention, foregoing mould water route refers in the Fresnel Lenses ejection shaping die deviceThe second die waterway in the first die waterway and a male mould in one master tooling.
It in one embodiment of this invention, is by a rapid heat cycle mold temperature control in aforementioned rapid heating stepMachine processed carries out anxious heat to input high hot steam to the die waterway.
It in one embodiment of this invention, is by a rapid heat cycle mold temperature in aforementioned fast cooling forming stepControl machine is spent to carry out chilling to die waterway input water at low temperature.
It in one embodiment of this invention, is saturating to the Fresnel by an injection molding machine of plastic in aforementioned injection stepMirror, which goes out, injects plastics in die device.
Another object of the present invention is to provide a kind of Fresnel Lenses ejection shaping die dress for being applicable in previous building methodsIt sets comprising:
One master tooling is formed at least one first assembling grove thereon, and is formed with one first mold water in the master toolingRoad is formed with the first die cavity being connected to first assembling grove in the one side of the master tooling；
One male mould is connected with each other with the master tooling, can the opposite master tooling it is mobile to abut or the separate master tooling,It is formed at least one on the male mould and aligns matched second assembling grove with corresponding first assembling grove, in the one side of the male mouldOn be formed with the second die cavity being connected to second assembling grove, second die cavity and first die cavity collectively constitute a die cavity；
An at least mother module core is separately positioned in corresponding first assembling grove；And
An at least male die core is separately positioned among corresponding second assembling grove, and is matched with the mother module core.
In one embodiment of this invention, one second die waterway is formed in aforementioned male mould.
In one embodiment of this invention, right-angled intersection is presented in aforementioned first die waterway and second die waterwayShape.
In one embodiment of this invention, aforementioned master tooling has a master mold pad and a master mold outline border, and at least one shouldFirst assembling grove, first die waterway and first die cavity are formed in the master mold pad, which is hollow formAnd it is set on the master mold pad.
In one embodiment of this invention, aforementioned male mould has a male model pad and a male model outline border, and at least one shouldSecond assembling grove, second die waterway and second die cavity are formed in the male model pad, which is hollow formAnd it is set on the male model pad.
In one embodiment of this invention, aforementioned first assembling grove is multiple, and mother module core is multiple；First die cavity hasOne first main plastic passages and multiple first branches plastic passages, multiple first branch plastic passages are from the first main plasticsRunner extends outwardly and is interconnected respectively with multiple first assembling groves.
In one embodiment of this invention, aforementioned second assembling grove is multiple, and male die core is multiple；Second die cavity hasOne second main plastic passages and multiple second branches plastic passages, the second main plastic passages correspond to the first main plastics streamRoad, multiple second branch plastic passages respectively correspond multiple first branch plastic passages, and from the second main plastic passagesExtend outwardly and is interconnected respectively with multiple second assembling groves.
In one embodiment of this invention, two opposed apexes of aforementioned first die waterway are 2 first confluences, each theOne first main split's access is formed on one confluence, which extends to except the master mold pad.
In one embodiment of this invention, 2 first secondary branches are formed on each first confluence of aforementioned first die waterwayAccess, the two first secondary tributary circuit extend to except the master mold pad.
In one embodiment of this invention, two opposed apexes of aforementioned second die waterway are 2 second confluences, each theOne second main split's access is formed on two confluences, which extends to except the male model pad.
In one embodiment of this invention, 2 second secondary branches are formed on each second confluence of aforementioned second die waterwayAccess, the two second secondary tributary circuit extend to except the male model pad.
In one embodiment of this invention, the rotation of one first Fresnel structure is formed on a medial surface of aforementioned mother module coreFace is formed with the one second Fresnel structure surfaces of revolution on one medial surface of the male die core.
In one embodiment of this invention, one first core waterway is formed with inside aforementioned mother module core.
In one embodiment of this invention, one second core waterway is formed with inside aforementioned male die core.
In one embodiment of this invention, two opposed apexes of the first core waterway of aforementioned mother module core are 2 first connectionsPoint is formed there through 2 first abdicating through holes on one first set gasket seal on the mother module core, and two first resigning is logicalHole and it is separately connected two first connectivity points.
In one embodiment of this invention, two opposed apexes of the second core waterway of aforementioned male die core are 2 second connectionsPoint is formed there through 2 second abdicating through holes on one second set gasket seal on the male die core, two second resigningThrough-hole and it is separately connected two second connectivity points.
In one embodiment of this invention, aforementioned Fresnel Lenses ejection shaping die device further comprises a fixed basePlate and a movable substrate, the fixed substrate are fixed to each other with master tooling, and at least one first mould is provided in the fixed substrateBenevolence pipeline group, each first mode pipeline group have one first to flow into pipe and one first effuser to be connected respectively to corresponding master moldTwo first abdicating through holes of benevolence；The movable substrate is fixed to each other with the male mould, and at least 1 is provided in the movable substrateTwo mode pipeline groups, each second mode pipeline group have one second to flow into pipe and one second effuser to be connected respectively to correspondenceTwo second abdicating through holes of male die core.
Yet another object of that present invention is to a kind of Fresnel Lenses by obtaining manufactured by previous building methods is provided, wrapIt includes:
One lens body and multiple annular concentric flanks, multiple annular concentric flanks are formed in the lens body simultaneouslyIt is arranged with concentric circular fashion, on the lateral section for passing through Fresnel Lenses central axis, multiple annular concentric flanks are not in sawTooth section, multiple saw tooth sections are subject to the central axis and bilateral symmetry shape；
Wherein, under the microscopical observation to be up to 150 enlargement ratios, the saw tooth section of each annular concentric flankTip shape is presented rather than fillet in tip.
In one embodiment of this invention, between aforementioned wantonly two adjacent saw tooth section have a sawtooth trench cross section, withUnder the microscopical observation of up to 150 enlargement ratios, tip shape is presented rather than fillet in the bottom of the sawtooth trench cross section.
The manufacturing method of the present invention enables plastics material and carrying out the processing step of rapid heat cycle to thermoplastic materialExpect the depression that can be fully filled in mold, uses the Fresnel Lenses for making to produce on the tip in sawtooth portion and in chaseStructure sharp keen enough is generated, and makes the effect of the surface tool bloom mirror surface of Fresnel Lenses, to promote Fresnel LensesOptical quality.
Detailed description of the invention
Fig. 1 is the stereo appearance figure of Fresnel Lenses ejection shaping die device of the present invention.
Fig. 2 is the cross-sectional view of Fresnel Lenses ejection shaping die device of the present invention.
Fig. 3 is master tooling, mother module core, male mould and the male die core in Fresnel Lenses ejection shaping die device of the present inventionBig portion's stereogram exploded view.
Fig. 4 is the stereo decomposing of the master mold pad and mother module core in Fresnel Lenses ejection shaping die device of the present inventionFigure.
Fig. 5 is the stereogram exploded view of the mother module core in Fresnel Lenses ejection shaping die device of the present invention.
Fig. 6 is the stereo decomposing of the male model pad and male die core in Fresnel Lenses ejection shaping die device of the present inventionFigure.
Fig. 7 is the stereogram exploded view of the male die core in Fresnel Lenses ejection shaping die device of the present invention.
Fig. 8 is the three-dimensional appearance of the plastic with plasticity in the die cavity in Fresnel Lenses ejection shaping die device of the present inventionFigure.
Fig. 9 is the floor map of the master mold pad in Fresnel Lenses ejection shaping die device of the present invention.
Figure 10 is the floor map of the male model pad in Fresnel Lenses ejection shaping die device of the present invention.
Figure 11 is the floor map of the mother module core in Fresnel Lenses ejection shaping die device of the present invention.
Figure 12 be Fresnel Lenses ejection shaping die device of the present invention in male die core and its inner mould water route put downFace schematic diagram.
Figure 13 is in Fresnel Lenses ejection shaping die device of the present invention along master tooling and male mould overlapping directionThe perspective diagram of die waterway and mode pipeline group.
Figure 14 is the cross-sectional view of Fresnel Lenses of the invention along central axis.
Figure 15 is that the amplification that Fresnel Lenses of the invention is presented under the electron microscope of 150 times of optical magnifications is cutd openFace schematic diagram.
Figure 16 is Fresnel Lenses ejection shaping die device, rapid heat cycle mould temperature controller and plastics of the inventionThe system block diagrams of injection molding machine.
Figure 17 be Fresnel Lenses of the present invention manufacturing method step flow chart.
Figure 18 is that the amplification profile that traditional Fresnel Lenses is presented under the electron microscope of 15 times of optical magnifications showsIt is intended to.
[symbol description]
1 Fresnel Lenses ejection shaping die device
2 rapid heat cycle mould temperature controllers
3 injection molding machine of plastic
10 master tooling, 11 master mold outline border
13 master mold pad, 130 first assembling grove
135 first die waterway, 1,350 first confluence
The secondary tributary circuit of 1351 first main split's access 1,352 first
136 first main 137 first branch's plastic passages of plastic passages
20 male mould, 21 male model outline border
23 male model pad, 230 second assembling grove
235 second die waterway, 2,350 second confluence
The secondary tributary circuit of 2351 second main split's access 2,352 second
30 mother module core, the 300 first Fresnel structure surfaces of revolution
301 first gasket seals 31,32 first abdicating through holes
35 first core waterway, 350 first connectivity points
40 male die core, the 400 second Fresnel structure surfaces of revolution
401 second gasket seals 41,42 second abdicating through holes
45 second core waterway, 450 second connectivity points
50 fixed substrates 51 first flow into pipe
52 first effusers
60 movable substrates 61 second flow into pipe
62 second effusers
80 Fresnel Lenses 80a Fresnel Lenses plastic sections
81 sawtooth convex block section, 811 tip
82 sawtooth trench cross section, 821 bottom
Plastic passages portion, C36 main C37 branch, plastic passages portion
90 91 tips of traditional Fresnel Lenses
92 chases
Specific implementation method
The invention will now be further described with reference to specific embodiments, the advantages and features of the present invention will be with description andIt is apparent.But examples are merely exemplary for these, and it is not intended to limit the scope of the present invention in any way.Those skilled in the artMember it should be understood that without departing from the spirit and scope of the invention can details to technical solution of the present invention and form intoRow modifications or substitutions, but these modifications and replacement are fallen within the protection scope of the present invention.
Fig. 1 to Fig. 3 and Figure 16 is please referred to, Fresnel Lenses ejection shaping die device 1 of the present invention can connect a chillingAnxious mold heat temperature controller 2 and injection molding machine of plastic 3, and include: a master tooling 10, a male mould 20, at least a mother module core30, an at least male die core 40, a fixed substrate 50 and a movable substrate 60.
Referring to figure 4. and Fig. 9, it is formed at least one first assembling grove 130 on the master tooling 10, and in the master tooling 10It is formed with heat steam, hot water that one first die waterway 135 injected for the rapid heat cycle mould temperature controller 2 or coldWater injects wherein, so that the master tooling 10 quickly and uniformly be heated or cooled.First die waterway 135 can for quadrangle,Spiral shape, U-shaped either any shape being evenly arranged in the master tooling 10.The heat steam of above-mentioned high temperature can have 140 to 160 and take the photographThe high temperature of family name's degree, can maintain the good fluidity of general thermoplastic material at this temperature, and visual situation improves heat steamingTemperature degree；In addition, cold water can carry out at this temperature for general thermoplastic material cooling solidifying at 80 to 90 degrees CelsiusGu also visual situation increases or decreases the temperature of the cold water.It is formed in the one side of the master tooling 10 and first assembling groveFirst die cavity of 130 connections is so that the injection molding machine of plastic 3 injection thermoplastic material is in wherein.In addition, the injection molding machine of plastic 3Temperature (also known as material temperature) of the thermoplastic material when projecting be usual between 200 to 260 degrees Celsius.
Among preferred embodiment, which has a master mold pad 13 and a master mold outline border 11, and at least one shouldFirst assembling grove 130, first die waterway 135 and first die cavity are formed in the master mold pad 13, the master mold outline border11 are hollow form and are set on the master mold pad 13.Two opposed apexes of first die waterway 135 are 2 first confluences1350, one first main split's access 1351 is formed on each first confluence 1350, which extends to thisExcept master mold pad 13.In addition, 2 first secondary tributary circuits 1352 are formed on each first confluence 1350, the two first secondary branchAccess 1352 extends to except the master mold pad 13.First main split's access 1351 can be connected from the rapid heat cycle mold temperatureThe pipeline of control machine 2, so that injection heat steam, hot water or cold water are into the master mold pad 13.The equal first secondary tributary circuit1352 can lock screw and seal and not connect exterior tubing separately, can also connect in other situations from the rapid heat cycle mold temperatureSpend control machine 2.
Fig. 6, Figure 10 and Figure 13 are please referred to, the male mould 20 and the master tooling 10 are connected with each other, can be with respect to the master tooling 10Movement is to abut or far from the master tooling 10.One second die waterway 235 is formed in the male mould 20 for chilling urgencyHeat steam, hot water or the cold water that mold heat temperature controller 2 is injected inject wherein, thus quickly and uniformly heating or coldBut the male mould 20.Second die waterway 235 either any can be evenly arranged on the male mould for quadrangle, spiral shape, U-shapedShape in 20.Second die waterway 235 can be presented with first die waterway 135 it is cross-shaped, as shown in figure 13.?It is formed at least one on the male mould 20 and aligns matched second assembling grove 230 with corresponding first assembling grove 130, in the male modelThe second die cavity being connected to second assembling grove 230 is formed in the one side of tool 20 so that the injection molding machine of plastic 3 injects thermoplasticityPlastic material is in wherein.Second die cavity and first die cavity collectively constitute a die cavity.
Among preferred embodiment, which has a male model pad 23 and a male model outline border 21, and at least one shouldSecond assembling grove 230, second die waterway 235 and second die cavity are formed in the male model pad 23, the male model outline border21 are hollow form and are set on the male model pad 23.Two opposed apexes of second die waterway 235 are 2 second confluences2350, one second main split's access 2351 is formed on each second confluence 2350, which extends to thisExcept male model pad 23.In addition, forming 2 second secondary tributary circuits on each second confluence 2350 of the second die waterway 2352352, which extends to except the male model pad 23.Second main split's access 2351, which can connect, to be comeFrom the pipeline of the rapid heat cycle mould temperature controller 2, so that injection heat steam, hot water or cold water are into the male model pad 23.The secondary tributary circuit 2352 of the grade second can lock screw and seal, and do not connect exterior tubing separately, can also connect in other situationsFrom the rapid heat cycle mould temperature controller 2.
Referring to figure 4., Fig. 5 and Figure 11, the mother module core 30 are arranged in corresponding first assembling grove 130.In the mother module coreHeat steam, hot water that one first core waterway 35 is injected for the rapid heat cycle mould temperature controller 2 are formed with inside 30Or cold water injection is wherein, so that the mother module core 30 quickly and uniformly be heated or cooled.First core waterway 35 can be fourAngular, spiral shape, U-shaped either any shape being evenly arranged in the mother module core 30.The two of first core waterway 35 are oppositeVertex is 2 first connectivity points 350, is formed there through 2 first on one first gasket seal 301 set by the mother module core 30 and allowsPosition through-hole 31,32, two first abdicating through hole 31,32 and is separately connected two first connectivity points 350.In addition, the mother module core 30A medial surface on be formed with the one first Fresnel structure surfaces of revolution 300, can be aspherical.Also, can be set on the mother module core 30Two bolts are equipped with so that further first gasket seal 301 to be fixed on the mother module core 30.
Please refer to Fig. 6, Fig. 7 and Figure 12, the male die core 40 be arranged among corresponding second assembling grove 230, and with the motherMode 30 matches.One second core waterway 45 is formed with inside the male die core 40 for rapid heat cycle mold temperature controlHeat steam, hot water or the cold water that machine 2 is injected inject wherein, so that the male die core 40 quickly and uniformly be heated or cooled.Second core waterway 45 can be quadrangle, spiral shape, U-shaped either any shape being evenly arranged in the male die core 40.It shouldTwo opposed apexes of the second core waterway 45 of male die core 40 are 2 second connectivity points 450, set on the male die core 402 second abdicating through holes 41,42 are formed there through on one second gasket seal 401, two second abdicating through hole 41,42 with connect respectivelyConnect two second connectivity points 450.In addition, being formed with the one second Fresnel structure surfaces of revolution on a medial surface of the male die core 40400.It is stamped in the heat in die cavity respectively by the first Fresnel structure surfaces of revolution 300 and the second Fresnel structure surfaces of revolution 400On plastic plastic material surface, Fresnel Lenses can be produced.Also, may be provided with two bolts on the male die core 40 further willSecond gasket seal 401 is fixed on the male die core 40.
Referring to figure 4., Fig. 6 and Fig. 8, in present pre-ferred embodiments, the first assembling grove 130 is multiple, mother module core30 be multiple；First die cavity has one first main plastic passages 136 and multiple first branches plastic passages 137, multiple to be somebody's turn to doFirst branch's plastic passages 137 extend outwardly from the first main plastic passages 136 and respectively with multiple first assembling groves 130It is interconnected.In addition, the second assembling grove 230 be it is multiple, male die core 40 be it is multiple；Second die cavity has one second main plastics streamRoad 236 and multiple second branches plastic passages 237, the corresponding first main plastic passages 136 of the second main plastic passages 236,Multiple second branch plastic passages 237 respectively correspond multiple first branch plastic passages 137, and from the second main plastics streamRoad 236 extends outwardly and is interconnected respectively with multiple second assembling groves 230.Pass through multiple aforementioned mother module cores 30 and public affairsThe configuration of mode 40 can enable Fresnel Lenses ejection shaping die device 1 that can produce in single secondary processing program severalFresnel Lenses.Plastics distribution in the die cavity is then as shown in figure 8, being presented main plastic passages portion C36, multiple being connected to the main modelingExpect the branch plastic passages portion C37 of flow path portion C36 and multiple is located at branch's plastic passages portion Fresnel Lenses plastic section80a.Hot steam, hot water or cold water are injected by aforementioned first die waterway 135 and the second die waterway 235 come to master tooling10 and male mould 20 carry out uniform rapid heat cycle, aforementioned main plastic passages portion C36, branch plastic passages portion C37 and luxuriant and rich with fragrance alunite can be madeThe temperature of your lens plastics portion 80a is equably gone up and down, and does not have that local plastic material temperature is too low and the solidification that takes the lead in leads to Fei NieThe molding of your lens is bad and the problem of reduce its optical quality.
The fixed substrate 50 is fixed to each other with master tooling 10, and at least one first mode pipe is provided in the fixed substrate 50Road group, each first mode pipeline group have one first to flow into pipe 51 and one first effuser 52 to be connected respectively to corresponding master moldTwo first abdicating through holes 31,32 of benevolence 30.The first inflow pipe 51 and the first effuser 52 may be connected to rapid heat cycle moldOn temperature controller 2, heat steam, hot water or cold water are injected to mother module core 30 whereby.
The movable substrate 60 is fixed to each other with the male mould 20, and at least one second mode is provided in the movable substrate 60Pipeline group, each second mode pipeline group have one second inflow pipe 61 and one second effuser 62 to be connected respectively to corresponding public affairsTwo second abdicating through holes 41,42 of mode 40.The second inflow pipe 61 and the second effuser 62 may be connected to rapid heat cycle mouldHave on temperature controller 2, heat steam, hot water or cold water are injected to male die core 40 whereby.
Fig. 1, Figure 16 and Figure 17 are please referred to, the present invention uses the Fei Nie of aforementioned Fresnel Lenses ejection shaping die device 1The manufacturing method of your lens, comprising: a rapid heating step S01, one project step S02, a transfer step S03 and one quicklyCool down forming step S04.
Rapid heating step S01 includes at least mold in aforementioned Fresnel Lenses ejection shaping die device 1High heat fluid is injected be heated rapidly to the flowable temperature of thermoplastic material in water route.An at least mold water above-mentionedRoad, the first die waterway 135 that can be individually in master tooling 10, or it is individually for the second interior die waterway 235 of male mould 20,Or first both die waterway 135 and the second die waterway 235.It is by aforementioned chilling in rapid heating step S01Anxious mold heat temperature controller 2 carries out anxious heat to input high hot steam to the die waterway.
Injection step S02 includes the die cavity injection liquid thermoplastic into the Fresnel Lenses ejection shaping die device 1Property plastic material.It is by foregoing plastics injection molding machine 3 to the Fresnel Lenses ejection shaping die in injection step S02Thermoplastic is injected in device 1.
Transfer step S03 includes the liquid thermoplastic plastic material pressurization at least a pair of of mode into the die cavity, withFresnel lens structure is generated in the thermoplastic material.
Fast cooling forming step S04 includes changing to the mode in the Fresnel Lenses ejection shaping die device 1Water route injects cryogen with the liquefied thermoplastic material being quickly cooled down in the die cavity and is allowed to cool solidification, and it is saturating to form FresnelMirror.It is by the rapid heat cycle mould temperature controller 2 come defeated to the core waterway in fast cooling forming step S04Enter water at low temperature to carry out chilling.
Figure 14 and Figure 15 is please referred to, the present invention passes through Fresnel Lenses 80 manufactured by previous building methods comprising: oneLens body and multiple annular concentric flanks, multiple annular concentric flanks are formed in the lens body and with concentric circles sideFormula arrangement, on the lateral section of central axis for passing through Fresnel Lenses, multiple annular concentric flanks are not in that sawtooth convex block is cutFace 81, the central axis is subject in multiple sawtooth convex block sections 81 and bilateral symmetry is distributed, and wantonly two adjacent saw-tooths convex block sectionThere is a sawtooth trench cross section 82 between 81.
Under the microscopical observation to be up to 150 enlargement ratios, the sawtooth convex block section 81 of each annular concentric flankTip 811 tip shape rather than fillet is presented, and tip shape is presented rather than circle in the bottom 821 of each sawtooth trench cross section 82Angle.
The present invention has the advantage that
1. the relevant manufacturing method of Fresnel Lenses ejection shaping die device 1 of the present invention and Fresnel Lenses usesFirst die waterway 135 and the second die waterway 235 to inject wherein for heat steam, hot water or cold water, thus quickly andThe master tooling 10 and male mould 20 are heated or cooled evenly, this make each position of the plastic material in die cavity temperature quickly,It evenly and uniformly goes up and down, avoids injection moulding process overlong time and the surface of Fresnel Lenses is caused to generate defect current mark, gas line,In addition, uniform temperature control can avoid thermoplastic material part cool and solidify in advance and cause it is short penetrate phenomenon, therefore can be promotedThe sharpness at the sharp position of Fresnel Lenses, to promote the optical quality of Fresnel Lenses, as shown in figure 15.
2. the first die waterway 135 and the second die waterway 235 of male mould 20 and master tooling 10 are in a manner of right-angled intersectionIt is configured, further promotes the performance to 20 even temperature control of master tooling 10 and male mould, promote the matter of Fresnel Lenses finished productAmount.