CN108802868A - OCM Fresnel Lenses and its moulding process - Google Patents
OCM Fresnel Lenses and its moulding process Download PDFInfo
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- CN108802868A CN108802868A CN201710304131.2A CN201710304131A CN108802868A CN 108802868 A CN108802868 A CN 108802868A CN 201710304131 A CN201710304131 A CN 201710304131A CN 108802868 A CN108802868 A CN 108802868A
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- fresnel lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
- B29D11/00269—Fresnel lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—Lenses
Abstract
The present invention relates to a kind of lens and its moulding process, a kind of OCM Fresnel Lenses and its moulding process are in particulard relate to.A kind of OCM Fresnel Lenses, including lens body, the lens body include substrate, and lenticular body is arranged in substrate side, and anti-reflection film is arranged in the other side, and several annular groove rings are arranged in lenticular body.The remarkable result of the application is：1) thermal stability and optically focused precision of this lens are improved.2) reflection from lens loss had not only been reduced, but also lens surface is protected to protect it from dust storm erosion.3) technical performance, production efficiency and manufacturing cost that ensure that OCM Fresnel Lenses realize the object technology performance and manufacturing cost desired value of technical solution.
Description
Technical field
The present invention relates to a kind of lens and its moulding process, a kind of OCM Fresnel Lenses and its molding work are in particulard relate to
Skill.
Background technology
Fresnel lens (Fresnel Lens), also known as Fresnel lens are that earlier 1800s are difficult to understand ancient by French physician
A kind of lens that Si Dingjian Fresnel is invented.The appearance of Fresnel Lenses is in lamellar, on one side surface, is carved with
Several equidistantly groove ring, this groove ring are the planoconvex spotlights that will have identical optical parameter with one heart, it is assumed that are divided into several
Equidistant annulus removes the linear light path part that vertical section among each annulus is rectangle, retains by spherical surface wheel
The wide parts of tooth constituted with imaginary annular sleeve facade, then whole parts of tooth are moved down to and are formed on substrate.It compares
Ordinary lens, its main feature is that material utilization amount is few, it is small, it is light-weight.Initial Fresnel lens is used for beacon, and use is this
Design can build larger diameter and more short focus lens, and design this compared to ordinary lens is lighter, thinner, by this
The convergence light of mirror transmitting can transmit farther, it is easier to which observed person has found.
With contemporary optics engineering, the incremental advances of high molecular material manufacture and high-accuracy mechanical processing and other fields, at present
Using high molecular polymer as raw material, using made of hot pressing note technique, plastic Fresnel lenses are as a kind of optical module, with it
Good in optical property, light-weight, convenient formation and the more low prominent characteristic of cost, it is equal to be widely used in Projection Display, optically focused
The fields such as energy, infrared acquisition and light optics.
Currently, a new important applied field of Fresnel Lenses is high light-focusing type photovoltaic generation (High
Concentrator Photovoltaic, hereinafter referred to as " HCPV ").This system is to be gathered sunlight using high collector lens
Collect on narrow focal spot (focal spot), and use high-effect light-focusing type photovoltaic chip (solar cell), luminous energy is turned
Turn to electric energy.Since the photoelectric conversion efficiency of HCPV is high, the time is long on the sunny side, and generated energy is high, therefore is known as after crystal silicon tablet
Solar energy generation technology of new generation after photovoltaic and amorphous silicon film photovoltaic.
HCPV systems are by high light-focusing type photovoltaic chip (High Concentrator Photovoltaic), high optically focused phenanthrene alunite
That lens (Fresnel Lens) and sunlight tracker (Sun Tracker) composition, solar energy transfer efficiency can
Up to 31%~40.7%.According to《Solar power generation》Report in May, 2015, " so-called high concentration ratio refer to focusing ratio 300~
Light condensing type photovoltaic power generation system between 1000, most high power concentrator electricity generation systems use Fresnel Lenses, and iii-v is partly led
More knot chips (such as three knot GaInP/InGaAs/Ge) of body material and single, double axle tracing system ".Since iii-v ties chip more
With the technology of tracking system relative maturity, and the Fresnel Lenses of heavy caliber, high concentration ratio, but because of thermoplastic material
Thermal stability difference and anti-blown sand erosiveness are low, are in embarrassing circumstances, to a technical bottleneck as HCPV.
According to《Polaris photovoltaic net》It the article pointed out in " painful topic of high power concentrator type photovoltaic technology " one, they
Optical system of two domestic solar energy industry esbablished corporations in the optically focused power station project submitted in the recent period is investigated.Wherein one
Using the Fresnel Lenses of high molecular material die casting, produced for equipment Imported From German EMH Company technology.It is said that 10 years light decays are less than 10%, but due to
Can material surface be softer (being unable to stand the abrasion when erosion and cleaning of dust storm), reach the uncertainty of light decay guarantee period very
Greatly.This thermoplastic material can cause to deform at high temperature, this is for the very high high power concentrator type photovoltaic system of required precision
Negative effect is fatal.Therefore, the service life of the optical system has to be seen.And the optical lens that another company uses, it is right
Outer title is glass, but the Fresnel Lenses of glass manufacture is problematic in that in weight, intensity and cost.According to intra-office, personage is saturating
Dew, this family are practical using the Fresnel Lenses scheme for using silica gel die casting on glass.In this regard, expert comments, mesh
Preceding known uvioresistant time longest, the service life of the optics silica gel of volume production is only 6 years.Problem described in document above, report,
Show worry of the HCPV industries to thermoplastic Fresnel Lenses performance and used life.
In general, under similarity condition, focusing ratio is higher, and the area of required solar cell is smaller.Currently, III-V
Race's semi-conducting material ties the opto-electronic conversion intensity of chip mostly in 100W/cm more2More than, it is assumed that, the size of the chip used for
4cm2, geometric concentrating ratio 1000, then the area of the Fresnel Lenses adapted to therewith is 4000cm2(63.3cm*63.3cm)。
If produced using thermoplastic die-casting process, under summer solarization high temperature, lens will produce thermal creep, due to this deformation
It is an accumulation, when depressed deformation amount is 3.17mm, the optical axis drift angle of said lens is up to 0.573 °, opto-electronic conversion effect
Rate will be substantially reduced.Some researches show that by taking 400 times of Fresnel Lenses as an example, if incidence angle deviates 0.5 °, optical efficiency will drop
It is 64%.
In conclusion HCPV at present used in Fresnel Lenses mostly use thermoplastic greatly and be made, although it is saturating
The technical-economic indexes such as photosensitiveness, corrosion resistance, spotlight effect and manufacturing cost can meet the basic demand of HCPV systems, but
That there is thermal stability is insufficient, thermal creep is big, surface is easily worn etc. by dust storm and influences generating capacity and shorten the working life tight
Weight is insufficient.These of thermoplastic Fresnel Lenses are insufficient, become a technical bottleneck, seriously constrain the development of HCPV.
Therefore, it is necessary on the basis of retaining plastic lens advantage, a kind of OCM of development and design (Optical Composite
Material, optical composite material) Fresnel Lenses, such as：It uses with light-transmission type glass-fiber reinforced thermo-setting light-transmissive resin
Lenticular body is manufactured for the thermosetting property optical composite material of matrix, to eradicate thermoplastic lenses on the physicochemical property of material
Performance it is insufficient, to meet the demand for development of HCPV industries.
Invention content
The purpose of the application is in view of the drawbacks of the prior art, to provide a kind of OCM Fresnel Lenses and its moulding process.
The technical solution of the application is：A kind of OCM Fresnel Lenses, including lens body, the lens body include substrate,
Lenticular body is arranged in substrate side, and anti-reflection film is arranged in the other side, and several annular groove rings are arranged in lenticular body.
A kind of OCM Fresnel Lenses as described above, wherein the groove ring is concentric ring.
A kind of OCM Fresnel Lenses as described above, wherein the groove ring spaced set.
A kind of OCM Fresnel Lenses as described above, wherein lenticular body uses thermosetting polymer resin and glass fibers
Dimension.
A kind of OCM Fresnel Lenses moulding process, includes the following steps,
Step 1：Preparation stage
(1) by fire-retardant light-transmission type unsaturated polyester resin, index of refraction regulator, hydroquinone, cobalt naphthenate, five kinds of MEKP
Raw material is according to quality proportioning 100：(0~15)：(0.01~0.5)：(0.5~4)：(1~4) is configured,
The design parameter of wherein fire-retardant light-transmission type unsaturated polyester resin is HR193, nD (20)1.5185~1.5215；Refractive power
The design parameter of rate regulator is MMA (methyl methacrylate), nD (20)=1.4142；TCEP, nD (20)=1.4731；SM, nD (20)=1.59~1.60；Hydroquinone is technical grade product；Cobalt content 2% in cobalt naphthenate；The active o content 8% of MEKP；
(2) prepare：Three layers of the light-transmission type alkali-free glass fiber chopped strand mat of 600*600mm, the light-transmission type alkali-free glass fibre
The design parameter of chopped mat is 300g/ ㎡, refractive index 1.551~1.554；The anti-reflection film of 600*600mm, the parameter of the anti-reflection film
It it is 13~15 μm, anti-reflection film is the polyester base film for being compounded with multiple layer metal thin oxide layer, visible light transmittance >
99.5%；
(3) mass ratio of glue and light-transmission type alkali-free glass fiber chopped strand mat is 100：(25~40)
(4) material prepares
Survey the index of refraction of HR193 liquid resins and the refractive index of pour mass；Light-transmission type alkali-free glass fibre is surveyed to be chopped
The refractive index n of monofilament, compares the refractive index of pour mass and monofilament in felt, if the difference of the two exceeds ± 0.0015, should use
Sample adjusts resin adhesive liquid index of refraction nD (20)So that the refractive index of sample pour mass is met above-mentioned difference range, and using this data as
Benchmark calculates the use for determining that this quantitatively prepares other materials in the index of refraction regulator dosage that should be added in resin and formula
Amount weighs resin and other raw materials by the formula dosage that above-mentioned calculating determines, sequence is added blender, stirs evenly, using true
Empty method eliminates bubble, and the glue placement after defoaming is spare,
Light-transmission type alkali-free glass fiber chopped strand mat and anti-reflection film are cut by lens shape and size,
Step 2：Mold
Mold includes groove forming module, planar module and die sleeve, and wherein planar module with substrate for matching, groove
Forming module with groove ring for matching, and die sleeve is for fixing groove forming module and planar module；Groove forming module
Exterior contour matches with OCM Fresnel Lenses size and shapes, and the cyclic annular groove to form ring gear line is carved on upper part surface；It is flat
Face mould block is that a size is slightly larger than OCM Fresnel Lenses square/square plate, and appearance and size cooperates with die sleeve top；
Its underpart is molded surface, and lower surface outer periphery is equipped with chamfering；The middle part of planar module stile is equipped with the rectangle of four sides perforation
Excessive glue groove, be provided with semicircle flute profile exhaust duct on the top of excessive glue groove, exhaust duct is by excessive glue groove and the surface phase on molding die
Unicom, exhaust duct is uniformly distributed along its circumferential direction, quantity on demand it was determined that but be no less than 1 per side, the die sleeve is an inside
Stepped square/square bushing, its underpart inner wall size is identical as the outer wall of OCM Fresnel Lenses, upper inside wall size with
Planar module matches；Above-mentioned mold is all made of corrosion resistant mould steel and is made；
Include the following steps when mold prepares：
(1) surface of its each die unit is coated into silicone oil and polished, repeated twice；
(2) above-mentioned mold is placed in incubator, temperature is adjusted to 30 DEG C, and heat preservation is spare；
(3) vacuum pump, maximum relative degree of vacuum -70kPa are checked；
(4) prepare vacuum compression bag, and air-tightness can be kept after checking closing；
Step 3：Charging
(1) being assembled together groove forming module and die sleeve forms a die cavity；Cleaning, the molding of polishing die cavity
Surface, it is spare；
(2) the light-transmission type alkali-free glass fiber chopped strand mat got ready is placed in shaping mold cavity, paved；
(3) load weighted resin adhesive liquid is gently poured into die cavity, keeps resin adhesive liquid equably that light-transmission type alkali-free glass is fine
Dimension chopped mat is impregnated with, and is stood slightly；
(4) molding of planar module is face-up, it clears up and polishes, the exposed surface of anti-reflection film is fitted in its forming surface
On,
(5) overturning planar module keeps molding face-down, is held, it is steadily fitted into die sleeve, with rubber hammer out with sucker
It is slow to tap planar module, make its assembly in place,
Step 4：Froth in vacuum is pressurizeed
(1) mold after molding charging, puts on vacuum compression bag；
(2) it arranges and shakeouts vacuum compression bag, the air intake duct of bleeding point and vacuum pump is connected；
(3) vacuum pump is opened, evacuating valve is slowly opened, is evacuated to -60kPa, closes bleeding point, keeps vacuum degree；
Step 5：Heating cure
(1) vacuum compression bag for keeping vacuum state and its internal molding die are put into togerther incubator, heating cure, temperature
The initial temperature of case is 30 DEG C；
(2) curing process curve is：30 DEG C of initial temperature → 10 minutes → 40 DEG C of heating, 15 minutes → 5 points of heating of heat preservation
Clock → 45 DEG C keep the temperature 5 minutes → naturally cool to room temperature；
(3) one piece of area is slightly less than to the chock block of groove forming blocks, is put on the table；Molding die 5 is overlayed
On chock block, adjusts position and put steady；
(4) die sleeve is tapped with rubber hammer, its abate is detached with other component, then removes planar module and molding successively
OCM products；
(5) flash for processing and modifying OCM products, product surface is cleared up with compressed air purging.
A kind of OCM Fresnel Lenses moulding process as described above, wherein wherein groove on the groove forming module
Surface is chrome plated mirror.
A kind of OCM Fresnel Lenses moulding process as described above, wherein the wherein lower inner wall surface of the die sleeve
Using chrome plated mirror.
A kind of OCM Fresnel Lenses moulding process as described above, wherein wherein the vacuum compression bag is moulded for rectangle
Material bag, is equipped with bleeding point above, and bag body side uses three embedded chain-type seals；The bleeding point is equipped with non-return valve and close
Seal cock；The bag body of the vacuum compression bag uses nylon (PA)+polyethylene (PE)+nylon (PA) multilayer complex films, allows to make
It is more than 50 DEG C with temperature.
The remarkable result of the application is：OCM Fresnel Lenses and its moulding process and existing thermoplastic Fresnel are saturating
Mirror, which is compared, to be had：
1) it uses the thermosetting property unsaturated polyester resin of glass fiber reinforcement for the material of main part of Fresnel Lenses, eradicates
The deficiencies of thermoplastic lenses rigidity is low, thermal stability is poor and thermal creep is big.The OCM Fresnels provided in the embodiment of the present invention
The rigidity of lens is 4.17 times of (IE of PC (makrolon) material lens rigidityOCM/IEPC=10GPa/2.4GPa), hence it is evident that it improves
The thermal stability and optically focused precision of this lens.
2) present invention uses the mounting means of plane upward, and being pasted on exposed surface has the plating of multiple layer metal oxide
The anti-reflection film of film had not only reduced reflection from lens loss, but also lens surface is protected to protect it from dust storm erosion.
3) vacuum compression molding technique is used, proposes that the principle to match with glass refractive index by resin adjustment glue is matched
Side designs the concrete technologies technical solution such as fixed thick, exhausting forming mould and vacuum pressed molding, ensure that OCM phenanthrene from many aspects
Technical performance, production efficiency and the manufacturing cost of Nie Er lens realize the object technology performance and manufacturing cost of technical solution
Desired value.Light transmittance, focusing ratio, thermal stability and the expection of the square Fresnel Lenses of the length of side of embodiment of the present invention 600mm
The key technical index such as service life meet over-all properties requirement of the HCPV systems to high light-focusing Fresnel lens.
Description of the drawings
Fig. 1 is the sectional structure chart of the present invention,
Fig. 2 is the formation basic theory figure of Fresnel Lenses,
Fig. 3 is appearance diagram of the present invention,
Fig. 4 is the application schematic diagram of the present invention,
Fig. 5 is the forming die structure schematic diagram of the present invention,
Fig. 6 is the moulding process flow process figure of the present invention,
Fig. 7 is that the molding die of the present invention is put into the schematic diagram of vacuum compression bag,
Fig. 8 be the present invention molding die in excessive glue groove partial enlarged view.
In figure, 1.OCM Fresnel Lenses, 2. planoconvex spotlights, 3. high performance solar batteries, 4. radiating seats, 5. molding dies,
6. vacuum compression bag；101. lenticular body, 102. groove rings, 103. substrates, 104. anti-reflection films, 105. secondary condensation lens, 201.
Spherical profile, 202. annular sleeves, 501. groove forming modules, 502. planar modules, 503. excessive glue grooves, 504. exhaust ducts, 505.
Die sleeve, 601. bleeding points, 602. seals.
Specific implementation mode
The application is described further below in conjunction with the accompanying drawings：
The present embodiment is OCM Fresnel Lenses, for the optical module in HCPV modules (see Fig. 4), for converging sunlight
With.OCM Fresnel Lenses 1 is mounted on module top, and high light-focusing type photovoltaic chip (solar cell) 3 is equipped at its focal spot,
Radiating seat 4 is housed below chip, in order to reduce the influence of sunlight incident angle deviation, is filled in the top of high light-focusing type photovoltaic chip 1
There are secondary condensation lens 105.
Shown in Fig. 1~4, the appearance of the present embodiment is square plate shape, including OCM (optical composite material) lenticular body
101 and anti-reflection film 104.On one side surface, it is carved with several concentric groove rings 102 at equal intervals；Another side surface is plane,
It is covered with anti-reflection film 104 thereon.The groove ring 102 assumes that the plano-convex that will have identical optical parameter with OCM Fresnel Lenses 1
Lens 2 are divided into several imaginary annular sleeves 202 at equal intervals；Then remove in the vertical section of each annular sleeve 202 is in square
The linear light path part of shape retains the parts of tooth being made of spherical profile 201 and 202 facade of imaginary annular sleeve；It again will be complete
Portion's parts of tooth is moved down to after substrate 103 forms lenticular body 101 and is formed.The OCM Fresnel Lenses 1 is high using thermosetting property
Molecule resin and glass fibre are main raw material(s), are made through vacuum compression molding technique.
The particular technique parameter of the present embodiment is：Appearance is rectangular, length of side 600mm*600mm, average thickness H=5mm, substrate
Thickness h=3mm, light transmittance >=86%, focusing ratio 1000, focal length 330mm, upward, surface mount anti-reflection film is (complete for lens plane
Light transmission rate 99.5%), it is contemplated that 25 years service life met technology requirement of the HCPV systems to high light-focusing Fresnel lens.
The present embodiment uses following vacuum compression molding techniques (see Fig. 7).
1) raw material prepare
A. resin adhesive liquid formula, weight ratio：
B. enhancing and auxiliary material
Three layers of light-transmission type alkali-free glass fiber chopped strand mat
(300g/ ㎡, refractive index 1.551~1.554) 600*600mm
Anti-reflection film (13~15 μm) 600*600mm
Anti-reflection film 104 is the polyester base film for being compounded with multiple layer metal thin oxide layer, visible light transmittance >
99.5%.
C. the ratio of glue and light-transmission type alkali-free glass fiber chopped strand mat is 100：25~40.The present embodiment lenticular body is theoretical
Weight 1.62kg, wherein resin adhesive liquid 1.296kg, light-transmission type alkali-free glass fiber chopped strand mat 0.324kg, glue and light-transmission type without
Alkali containing glass fibre chopped mat is 100：25.
D. material prepares
Survey the index of refraction of HR193 liquid resins and the refractive index of pour mass；Light-transmission type alkali-free glass fibre is surveyed to be chopped
The refractive index n of monofilament in felt.Compare the refractive index of pour mass and monofilament, if the difference of the two exceeds ± 0.0015, should use
Sample adjusts resin adhesive liquid index of refraction nD (20)So that the refractive index of sample pour mass is met above-mentioned difference range, and using this data as
Benchmark calculates the use for determining that this quantitatively prepares other materials in the index of refraction regulator dosage that should be added in resin and formula
Amount.By the formula dosage that above-mentioned calculating determines, resin and other raw materials are weighed, sequence is added blender, stirs evenly, using true
Empty method eliminates bubble, and the glue after defoaming is placed spare.The present embodiment glue presses 1 product configuration.
Light-transmission type alkali-free glass fiber chopped strand mat and anti-reflection film 104 are cut by lens shape and size.
2) equipment and mold prepare
Shown in Fig. 6, Fig. 7 and Fig. 8, molding die 5 includes groove forming module 501, planar module 502 and die sleeve 505,
Above three component can assemble.The exterior contour of the groove forming module 501 and 1 size and shape of OCM Fresnel Lenses
It matches, the cyclic annular groove to form ring gear line is carved on upper part surface, which is chrome plated mirror.The planar module
502 are slightly larger than 1 square of OCM Fresnel Lenses/square plate for a size, and appearance and size cooperates with 505 top of die sleeve；
Its underpart is molded surface, and lower surface outer periphery is equipped with chamfering；The middle part of 502 stile of planar module is equipped with the square of four sides perforation
The excessive glue groove 503 of shape is provided with semicircle flute profile exhaust duct 504 on the top of excessive glue groove 503, exhaust duct 504 by excessive glue groove 503 at
Surface on pattern tool 5 is connected, and exhaust duct 504 is uniformly distributed along its circumferential direction, and quantity per side on demand it was determined that but be no less than 1
It is a.The die sleeve 504 is the stepped square/square bushing in an inside, its underpart inner wall size and OCM Fresnel Lenses 1
Outer wall it is identical, upper inside wall size is matched with planar module 501；The lower inner wall surface of die sleeve 504 uses chrome plated mirror.
The molding die 5 is made of corrosion resistant mould steel.
A. it checks cleaning molding die 5, the surface of its each die unit is coated into silicone oil and polishes, repeat twice.
B. molding die 5 is placed in incubator, and temperature is adjusted to 30 DEG C, and heat preservation is spare.
C. vacuum pump, maximum relative degree of vacuum -70kPa are checked.
D. prepare vacuum compression bag 6, and air-tightness can be kept after checking closing.Vacuum compression bag 6 is rectangular plastic bag,
It is equipped with bleeding point 601 above, bag body side uses three embedded chain-type seals 602；The bleeding point 601 is equipped with non-return valve
And sealing cock；The bag body of the vacuum compression bag 6 uses nylon (PA)+polyethylene (PE)+nylon (PA) multilayer complex films, permits
Perhaps temperature in use is more than 50 DEG C.
3) it feeds
A. groove forming module 501 is placed on operating platform, with being assembled together for die sleeve 505, forms a die cavity；
Cleaning, the molded surface for polishing die cavity, it is spare.
B. the light-transmission type alkali-free glass fiber chopped strand mat got ready is placed in shaping mold cavity, paved.
C. load weighted resin adhesive liquid is gently poured into die cavity, makes resin adhesive liquid equably by light-transmission type alkali-free glass fibre
Chopped mat is impregnated with, and is stood slightly.
D. the molding of planar module 502 is face-up, it clears up and polishes.The exposed surface of anti-reflection film is fitted in its molding
On face.
E. overturning planar module 502 keeps molding face-down, is held with sucker, it is steadily fitted into die sleeve 505.Use rubber
Hammer out is slow to tap planar module 502, makes its assembly in place.
4) froth in vacuum is pressurizeed
A. the mold after lifting charging molding with double fork hoist(-se)s, puts on vacuum compression bag 6, puts on the table.
B. it arranges and shakeouts vacuum compression bag 6, bleeding point 601 is connect by close encapsulation mouth 602 with the air intake duct of vacuum pump
It is good.
C. vacuum pump is opened, evacuating valve is slowly opened, is evacuated to -60kPa, closes bleeding point 601, keeps vacuum
Degree.
5) heating cure
A. the vacuum compression bag 6 for keeping vacuum state and its internal molding die 5 are put into togerther incubator, heating cure.
The initial temperature of incubator is 30 DEG C.
B. curing process curve is：30 DEG C of initial temperature → 10 minutes → 40 DEG C of heating, 15 minutes → heating of heat preservation 5 minutes
It → 45 DEG C, keeps the temperature 5 minutes → naturally cools to room temperature.
C., one piece of area is slightly less than to the chock block of groove forming blocks 501, is put on the table；Molding die 5 is stacked
On chock block, adjusts position and put steady.
D. die sleeve 505 is tapped with rubber hammer, its abate is detached with other component.Then planar module 502 is removed successively
With molding OCM products.
E. mold is cleared up, prepares molding next time and uses.
F. the flash for processing and modifying OCM products, product surface is cleared up with compressed air purging.
6) test package
OCM products after cleaning are qualified through examining, and become OCM Fresnel Lenses 1.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.It is if these modifications and variations are within the scope of the claims of the present invention and its equivalent technology, then of the invention
It is also intended to include these modifications and variations.
Claims (8)
1. a kind of OCM Fresnel Lenses, it is characterised in that：Including lens body, which includes substrate, and substrate side is set
Lenticular body is set, anti-reflection film is arranged in the other side, and several annular groove rings are arranged in lenticular body.
2. a kind of OCM Fresnel Lenses as described in claim 1, it is characterised in that：The groove ring is concentric ring.
3. a kind of OCM Fresnel Lenses as claimed in claim 2, it is characterised in that：The groove ring spaced set.
4. a kind of OCM Fresnel Lenses as claimed in claim 3, it is characterised in that：Lenticular body uses thermosetting polymer tree
Fat and glass fibre.
5. a kind of OCM Fresnel Lenses moulding process, which is characterized in that include the following steps,
Step 1：Preparation stage
(1) by five kinds of fire-retardant light-transmission type unsaturated polyester resin, index of refraction regulator, hydroquinone, cobalt naphthenate, MEKP raw materials
According to quality proportioning 100：(0~15)：(0.01~0.5)：(0.5~4)：(1~4) is configured,
The design parameter of wherein fire-retardant light-transmission type unsaturated polyester resin is HR193, nD (20)1.5185~1.5215；Index of refraction tune
Whole dose of design parameter is MMA (methyl methacrylate), nD (20)=1.4142；TCEP, nD (20)=1.4731；SM, nD (20)=
1.59~1.60；Hydroquinone is technical grade product；Cobalt content 2% in cobalt naphthenate；The active o content 8% of MEKP；
(2) prepare：Three layers of the light-transmission type alkali-free glass fiber chopped strand mat of 600*600mm, the light-transmission type alkali-free glass fibre are chopped
The design parameter of felt is 300g/ ㎡, refractive index 1.551~1.554；The parameter of the anti-reflection film of 600*600mm, the anti-reflection film is 13
~15 μm, anti-reflection film is the polyester base film for being compounded with multiple layer metal thin oxide layer, visible light transmittance > 99.5%；
(3) mass ratio of glue and light-transmission type alkali-free glass fiber chopped strand mat is 100：(25~40)
(4) material prepares
Survey the index of refraction of HR193 liquid resins and the refractive index of pour mass；It surveys in light-transmission type alkali-free glass fiber chopped strand mat
The refractive index n of monofilament, compares the refractive index of pour mass and monofilament, if the difference of the two exceeds ± 0.0015, should use sample
Adjust resin adhesive liquid index of refraction nD (20)The refractive index of sample pour mass is set to meet above-mentioned difference range, and using this data as base
Standard calculates the dosage for determining that this quantitatively prepares other materials in the index of refraction regulator dosage that should be added in resin and formula,
By the formula dosage that above-mentioned calculating determines, resin and other raw materials are weighed, sequence is added blender, stirs evenly, using vacuum
Method eliminates bubble, and the glue placement after defoaming is spare,
Light-transmission type alkali-free glass fiber chopped strand mat and anti-reflection film are cut by lens shape and size,
Step 2：Mold
Mold includes groove forming module, planar module and die sleeve, and wherein planar module with substrate for matching, groove molding
Module with groove ring for matching, and die sleeve is for fixing groove forming module and planar module；The outside of groove forming module
Profile matches with OCM Fresnel Lenses size and shapes, and the cyclic annular groove to form ring gear line is carved on upper part surface；Plane mould
Block is that a size is slightly larger than OCM Fresnel Lenses square/square plate, and appearance and size cooperates with die sleeve top；Under it
Portion is molded surface, and lower surface outer periphery is equipped with chamfering；The middle part of planar module stile is equipped with overflowing for the rectangle of four sides perforation
Glue groove is provided with semicircle flute profile exhaust duct on the top of excessive glue groove, and excessive glue groove and the surface on molding die are connected by exhaust duct,
Exhaust duct is uniformly distributed along its circumferential direction, quantity on demand it was determined that but be no less than 1 per side, the die sleeve is that an inside is in rank
Square/square bushing of scalariform, its underpart inner wall size is identical as the outer wall of OCM Fresnel Lenses, upper inside wall size and plane
Module matches；Above-mentioned mold is all made of corrosion resistant mould steel and is made；
Include the following steps when mold prepares：
(1) surface of its each die unit is coated into silicone oil and polished, repeated twice；
(2) above-mentioned mold is placed in incubator, temperature is adjusted to 30 DEG C, and heat preservation is spare；
(3) vacuum pump, maximum relative degree of vacuum -70kPa are checked；
(4) prepare vacuum compression bag, and air-tightness can be kept after checking closing；
Step 3：Charging
(1) being assembled together groove forming module and die sleeve forms a die cavity；Cleaning, the molded surface for polishing die cavity,
It is spare；
(2) the light-transmission type alkali-free glass fiber chopped strand mat got ready is placed in shaping mold cavity, paved；
(3) load weighted resin adhesive liquid is gently poured into die cavity, keeps resin adhesive liquid equably that light-transmission type alkali-free glass fibre is short
It cuts felt to be impregnated with, stand slightly；
(4) molding of planar module is face-up, it clears up and polishes, the exposed surface of anti-reflection film is fitted in its forming surface,
(5) overturning planar module keeps molding face-down, is held with sucker, it is steadily fitted into die sleeve, is gently struck with rubber hammer
Planar module is hit, makes its assembly in place,
Step 4：Froth in vacuum is pressurizeed
(1) mold after molding charging, puts on vacuum compression bag；
(2) it arranges and shakeouts vacuum compression bag, the air intake duct of bleeding point and vacuum pump is connected；
(3) vacuum pump is opened, evacuating valve is slowly opened, is evacuated to -60kPa, closes bleeding point, keeps vacuum degree；
Step 5：Heating cure
(1) vacuum compression bag for keeping vacuum state and its internal molding die are put into togerther incubator, heating cure, incubator
Initial temperature is 30 DEG C；
(2) curing process curve is：30 DEG C of initial temperature → 10 minutes → 40 DEG C of heating, heat preservation 15 minutes → heating 5 minutes →
It 45 DEG C, keeps the temperature 5 minutes → naturally cools to room temperature；
(3) one piece of area is slightly less than to the chock block of groove forming blocks, is put on the table；Molding die 5 is overlayed chock
On block, adjusts position and put steady；
(4) die sleeve is tapped with rubber hammer, its abate is detached with other component, then remove planar module and molding successively
OCM products；
(5) flash for processing and modifying OCM products, product surface is cleared up with compressed air purging.
6. a kind of OCM Fresnel Lenses moulding process as claimed in claim 5, it is characterised in that：The wherein described groove at
Groove surface is chrome plated mirror on pattern block.
7. a kind of OCM Fresnel Lenses moulding process as claimed in claim 6, it is characterised in that：The wherein described die sleeve
Lower inner wall surface uses chrome plated mirror.
8. a kind of OCM Fresnel Lenses moulding process as claimed in claim 7, it is characterised in that：The wherein vacuum pressure
Contracting bag is rectangular plastic bag, is equipped with bleeding point above, and bag body side uses three embedded chain-type seals；The bleeding point is set
There are non-return valve and sealing cock；The bag body of the vacuum compression bag is multiple using nylon (PA)+polyethylene (PE)+nylon (PA) multilayer
Film is closed, temperature in use is allowed to be more than 50 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710304131.2A CN108802868A (en) | 2017-05-03 | 2017-05-03 | OCM Fresnel Lenses and its moulding process |
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| CN201710304131.2A CN108802868A (en) | 2017-05-03 | 2017-05-03 | OCM Fresnel Lenses and its moulding process |
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| CN110174024A (en) * | 2019-03-29 | 2019-08-27 | 宋九宏 | The safety control system of portable weapon |
| CN112192798A (en) * | 2020-09-24 | 2021-01-08 | 深圳市嗨酷视觉科技有限公司 | Fresnel lens, window product and manufacturing method of Fresnel lens |
| CN114609826A (en) * | 2022-03-11 | 2022-06-10 | Tcl华星光电技术有限公司 | Backlight module and liquid crystal display device |
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Effective date of registration: 20181211 Address after: 100039 Beijing Economic and Technological Development Zone, No. 3 Building, 18 Kechuang Thirteenth Street, 909 Applicant after: Beijing Shouyao Technology Co., Ltd. Address before: 066004 No. 9 Haoyue Street, Haigang District, Qinhuangdao City, Hebei Province Applicant before: Qinhuangdao Yaohua FRP Co., Ltd. |
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Application publication date: 20181113 |