CN109807037A - A kind of guard method for optics shielding window exposed electrode - Google Patents

A kind of guard method for optics shielding window exposed electrode Download PDF

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Publication number
CN109807037A
CN109807037A CN201910037286.3A CN201910037286A CN109807037A CN 109807037 A CN109807037 A CN 109807037A CN 201910037286 A CN201910037286 A CN 201910037286A CN 109807037 A CN109807037 A CN 109807037A
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China
Prior art keywords
electrode
shielding window
silicon rubber
optics shielding
exposed electrode
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CN201910037286.3A
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CN109807037B (en
Inventor
张燕
陶忠
杨海成
苏瑛
许小雷
柳植溪
赵红军
张森
赵瑱
贾雪涛
崔强
许增奇
徐红伟
杨朝
郭芮
杨崇民
王章利
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Xian institute of Applied Optics
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Xian institute of Applied Optics
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Abstract

The present invention proposes a kind of guard method for optics shielding window exposed electrode, for the deficiency of existing guard method, by selecting high temperature resistant, cold resistance, good macromolecular material-the silicon rubber of durability energy is as electrode protection material, silicon rubber is diluted by organic solvent, and spraying covering is carried out to optics shielding window surface exposed electrode using the process for covering the spraying of multiple and silicon rubber before spraying, electrode protecting layer is formed after silicon rubber is fully cured, under the premise of not influencing the shielding properties and optical property of optical window, both the cosmetic requirements of product had been met, the high-low temperature resistant of the exposed electrode under flight operating condition is met again, air blast, the environmental adaptability requirements such as sand dust.Solve the problems, such as that poor reliability existing for other protection materials and method, exposed electrode are caducous.

Description

A kind of guard method for optics shielding window exposed electrode
Technical field
The invention belongs to ray machine assembly and spraying field, specially a kind of protections for optics shielding window exposed electrode Method.
Background technique
Optical window is the important component of airborne lidar for fluorescence, good having for the RCS performance for guaranteeing aircraft Optics, mechanics and while thermal property, it is also necessary to have good electromagnetic shielding capability.To realize optical window shielding, Using the metallization of the conductive metal grid realization optical window in the production of optical window surface with electro-magnetic screen function, then High-intensitive protective film is coated on metallic mesh.Due to the limitation of coating process, conductive metal grid can not be all covered, is caused Electrode at optical window window edge is exposed, to prevent the adverse circumstances such as sand dust in flight course from falling off caused by electrode, it is necessary to Reliably protecting is carried out to electrode, lead rupture is avoided to cause the decline of electromagnetic shielding performance.
The protective coating for metal electrode and conductive film that can be found at present have acrylic resin type coating and Epoxy resin primer coating.Such as the protective coating for nano-silver conductive film is exactly that use with methyl methacrylate be main The resin type coating of raw material forms one layer of protective layer for being similar to transparent organic glass on surface, can prevent conductive film from generally depositing It is easy scuffing, resistance to environment is poor the defects of.Epoxy resin primer coating can be used for the protection of metal electrode by the way of spraying, With salt fog resistance, humidity resistance and mechanical property, there is preferable adhesive force to metal electrode.
Optics shielding window is a kind of optical window with more Special use function, and China only has certain country's weight at present The metallization optics shielding window is used on the aircraft of point model project.The optical window edge one week is in addition to electrode, remaining part Position is plated with high-intensitive protective film.Since electrode is directly exposed in the external world, to meet requirement, it is necessary to carry out reinforcement guarantor to it Shield prevents sand dust from destroying to scuffing of electrode etc..Since use environment is severe, product needs to be subjected to prolonged ultraviolet light and shines Penetrate, meet 150 DEG C of -55 DEG C~﹢ of the impact of the multifrequency time temperature difference and the aeroperformance of a variety of flight operating conditions.Applicant once used Above-mentioned acrylic resin class coating and zinc yellow epoxy primer carry out sprayed protection to electrode, but product in actual use Still easily there is the case where sag of protecting coating, analysis main cause is because acrylic resin and epoxy resin primer all belong to In resin material, material is hard and crisp, and elasticity is small, and weatherability is poor, and is easily broken under ultraviolet irradiation, with optical substrate material Thermal expansion coefficient there are larger difference, with the temperature difference extraneous in flight course repeatedly alternately and repeatedly, cause adhesive force to reduce, Localized delamination phenomenon can be gradually appeared, it is frequent while epoxy sag of protecting coating especially when optical window is crystalline material The crystal grain that will lead to substrate falls off, and causes the damage of optical window marginal surface substrate.Therefore existing guard method and discomfort Protection for optics shielding window metal electrode.
Other documents and patent report are had not seen for the protection of exposed electrode on optical window.Therefore it needs to seek one kind Suitable for the protection materials and feasible protection technique of optical window electrode, it was not only able to satisfy the Functional Requirement of product, but also can expire The environmental adaptability requirements such as high-low temperature resistant, sand dust of the foot under flight operating condition.
Summary of the invention
In view of the deficiencies of the prior art, the invention proposes a kind of guard methods of optics shielding window exposed electrode, lead to Macromolecular material-the silicon rubber for selecting high temperature resistant, cold resistance, durability energy good is crossed as electrode protection material, to silicon rubber Glue is diluted by organic solvent, and is carried out spraying to the surface exposed electrode of optical window using the process of spraying and covered Lid, forms electrode protecting layer after silicon rubber is fully cured.
The technical solution of the present invention is as follows:
A kind of guard method for optics shielding window exposed electrode, it is characterised in that: the following steps are included:
Step 1: the shell in non-metal electrode region and assembly optics shielding window to optics shielding window cover multiple;
Step 2: being diluted to silicon rubber: being weighed respectively according to the ratio that silicon rubber and xylene mass ratio are 2: 1 Silicon rubber and dimethylbenzene, weighing error are no more than ± 5%;And mix silicon rubber in vessel with dimethylbenzene, it stirs evenly;
Step 3: by the exposing electrode wiped clean of optics shielding window;And the shell equipped with optics shielding window is placed On spraying operation platform;
Step 4: by step 2 dilute after silicon rubber spray gun watering can in and assembleBore nozzle, adjustment spray Rifle air pressure, it is ensured that spray silicon rubber into spray pattern;
Step 5: controlling the nozzle of spray gun and the electrode distance being sprayed-on, be primary spray along the circle of electrode continuous spray one It applies;It at least sprays to place afterwards twice and dries at least 30min in 60 DEG C of ± 5 DEG C of environment;Again continuous spray at least twice after, place 60 At least 2h, then normal temperature cure at least 8h are dried in DEG C of ± 5 DEG C environment;
Step 6: after silicon rubber is fully cured, removing the multiple material that covers in step 1, and carry out to optics shielding window surface Cleaning.
Further preferred embodiment, a kind of guard method for optics shielding window exposed electrode, feature exist In: the shell in the non-metal electrode region of optics shielding window and assembly optics shielding window is carried out covering multiple tool in step 1 Body process are as follows: stickup covering is carried out to the non-electrode region of optical window using no glue adhesive tape, using no glue adhesive tape or U.S. line paper pair The shell of assembly optics shielding window carries out stickup covering, only reserves electrode zone to be coated;Adhesive tape is compressed, guarantees to paste seamless; Gap between adhesive tape is carried out filling out envelope with shellac varnish.
Further preferred embodiment, a kind of guard method for optics shielding window exposed electrode, feature exist In: alcohol, ether mixed liquor are dipped in by the electrode wiped clean of exposing with absorbent cotton in step 3, remove greasy dirt, the sweat stain on electrode Or foreign matter.
Further preferred embodiment, a kind of guard method for optics shielding window exposed electrode, feature exist In: alcohol ether volume ratio is 7:3 in step 3.
Further preferred embodiment, a kind of guard method for optics shielding window exposed electrode, feature exist In: remove in step 6 in step 1 cover multiple material after, wipe shellac varnish remained on surface with alcohol.
Beneficial effect
The beneficial effects of the present invention are embodied in the following aspects:
(1) use silicone rubber coating to electrode protection in the present invention, silicon rubber has compared to more other epoxy-like materials Excellent resistance to ozone and ageing-resistant performance can use under ultraviolet light and other awful weather weather conditions, for a long time for length Optics shielding window under the conditions of time use outdoors has good protection effect.
(2) use silicone rubber coating to electrode protection in the present invention, silicon rubber has compared to more other epoxy-like materials The cold resistance of height and and heat resistance, 250 DEG C of -70 DEG C~﹢ of wide temperature use scope, for multifrequency time use in high/low temperature Optics shielding window under the conditions of big difference variation has good protection effect, and elastic property can make up under the big temperature difference not With the expansion coefficient difference of material, the damage to base optical material is avoided.
(3) use silicone rubber coating to electrode protection in the present invention, silicon rubber is strong with electrode adhesion, and it is not easily to fall off, it can Meet the use demands such as windage of the optics shielding window under the various flight operating conditions of aircraft, pneumatic.
(4) silicon rubber is diluted using dimethylbenzene in the present invention, by selecting suitable dilution ratio can will be more sticky It is suitable for the viscosity for spraying needs that silicon rubber, which is diluted to, meets spraying needs.
(5) process for using spraying in the present invention to silicon rubber, compared to the process of more traditional smearing, silicon rubber Glue-line uniformity, aesthetics are more preferable, and thickness accuracy is higher.
(6) cover again to coating position is not required to using no glue adhesive tape in the present invention, do not have residue glue retention after removing.For The infiltration for preventing lap gap silicon rubber carries out linking filling with protection liquid-shellac varnish to adhesive tape gap, can both prevent from spraying The infiltration in multiple gap is covered during applying, and optical glass will not be caused to corrode or damaged, can easily be wiped clearly with alcohol.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures Obviously and it is readily appreciated that, in which:
Fig. 1 is optics shielding window schematic diagram, including exposed electrode 1, metallic mesh 2, high-intensitive protective film 3, anti-reflection film 4, optical window 5.
Fig. 2 is optics shielding window schematic diagram after the assembly is completed, including exposed electrode 1, metallic mesh 2, optical window 5, Metal shell 6.
Fig. 3 is schematic diagram after spraying is covered again, including protective glue band 8, shell on exposed electrode 1, shellac varnish 7, optical window Upper protective glue band 9.
Fig. 4 is optical window schematic surface after silicone rubber coating protection, including optical window 5, metal shell 6, silicon rubber Glue spray coating 10.
Specific embodiment
The embodiment of the present invention is described below in detail, the embodiment is exemplary, it is intended to it is used to explain the present invention, and It is not considered as limiting the invention.
The optics shielding window shape of the preferred embodiment of the present invention is as shown in Fig. 1, and shape is special-shaped wedge-shaped optical part, It is made of the intensity protective film of optical glass, spun gold net coral, edge and incline metal electrode, inner surface anti-reflection film and outer surface.
Fig. 2 is that optics shielding window is assembled to the assembling schematic diagram on metal shell, metal shell and metallization optical window Mouth is in such a way that wedge-like engagement, circlip fasten.The metallic mesh and edge and side electricity that optical window outer surface is coated with Extremely it is connected, optical window and metal shell cooperate by using wedge surface, and wedge-like engagement section reality is uniformly applied to using conducting resinl Now light metal electrode and metal shell conduct.Since exposed electrode is in the marginal position of window, because of prior art level Limit its surface without the protection of high-intensitive protective film, if not taking other safeguard measures, outer surface exposed electrode falls off Metallization optical glass and the continuity that conducts of shell will be will cause, influence the shielding properties energy of product.
By selecting high temperature resistant, cold resistance, durability energy, good macromolecular material-silicon rubber is used as electricity to the present invention Pole protection materials are diluted silicon rubber by organic solvent, and using spraying process to optical window surface outside Dew electrode carries out spraying covering, forms electrode protecting layer after silicon rubber is fully cured.The present invention is a kind of suitable for optical panel The guard method of window exposed electrode is covered, the Functional Requirement of product has not only been able to satisfy, but also the resistance to height under flight operating condition can be met The environmental adaptability requirements such as low temperature, sand dust.
Specific steps are as follows:
Step 1: non-metal electrode region cover multiple.As shown in figure 3, nonmetallic to optical window using no glue adhesive tape Electrode zone carries out stickup covering, carries out stickup covering to the shell of assembly optical window using no glue adhesive tape or U.S. line paper, only Metal electrode is reserved, adhesive tape is compressed, guarantees to paste seamless.Gap between adhesive tape is carried out filling out envelope with shellac varnish.Inside is not required to The soft paper of local protection of spraying and U.S. line paper protection are in place.
Step 2: silicon rubber is diluted.The ratio for being 2: 1 according to silicon rubber and xylene mass ratio, weighs silicon respectively Rubber and dimethylbenzene, weighing error is no more than ± 5%, and two components are mixed in metalware, stirs evenly.
Step 3: dipping in alcohol, ether mixed liquor (alcohol ether volume ratio is 7:3) with absorbent cotton the metal of exposing is electric Pole wiped clean cannot have greasy dirt, sweat stain or foreign matter on electrode.Cleaning cotton is half-dried, prevents mixed liquor from penetrating into protective glue band In.It will be placed on spraying operation platform equipped with the shell of optics shielding window, make to be sprayed-on face as far as possible and be in a horizontal state, inclination angle ≤ 30 ° of degree, hand must not touch exposed electrode.
Step 4: the silastic liquid after diluting in step 2 being poured into the watering can of PQ-1 type spray gun, is using boreNozzle, against breadboard adjust spray gun air pressure, guarantee spray silicon rubber at spray pattern.
Step 5: the nozzle of spray gun and the metal electrode distance about 20cm being sprayed-on are enclosed along metal electrode continuous spray one Be it is primary, make silicon rubber uniform fold on metal electrode, continuous spray twice after, place baking oven, make to be sprayed-on face in level State, tilt angle≤30 °, 60 DEG C of ± 5 DEG C of drying 30min~60min.Again continuous spray twice after, place baking oven, make to be sprayed Coating surface is in a horizontal state, tilt angle≤30 °, 60 DEG C of ± 5 DEG C of drying 2h or more, then normal temperature cure 8h or more.
Step 6: after silicon rubber is fully cured, remove that non-spraying surface pastes without glue adhesive tape, tearing abutting electrode Adhesive tape when, should along adhesive tape move towards by silastic-layer cut be broken, guarantee it is neat;Optical window remained on surface is wiped with alcohol Shellac varnish.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective In the case where can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.

Claims (5)

1. a kind of guard method for optics shielding window exposed electrode, it is characterised in that: the following steps are included:
Step 1: the shell in non-metal electrode region and assembly optics shielding window to optics shielding window cover multiple;
Step 2: being diluted to silicon rubber: weighing silicon rubber respectively according to the ratio that silicon rubber and xylene mass ratio are 2: 1 Glue and dimethylbenzene, weighing error are no more than ± 5%;And mix silicon rubber in vessel with dimethylbenzene, it stirs evenly;
Step 3: by the exposing electrode wiped clean of optics shielding window;And the shell equipped with optics shielding window is placed on spray It applies on station;
Step 4: by step 2 dilute after silicon rubber spray gun watering can in and assembleBore nozzle, adjustment spray gun are empty Atmospheric pressure, it is ensured that spray silicon rubber into spray pattern;
Step 5: controlling the nozzle of spray gun and the electrode distance being sprayed-on, be primary spraying along the circle of electrode continuous spray one;Extremely Few spraying is placed afterwards twice dries at least 30min in 60 DEG C of ± 5 DEG C of environment;Again continuous spray at least twice after, place 60 DEG C ± 5 At least 2h, then normal temperature cure at least 8h are dried in DEG C environment;
Step 6: after silicon rubber is fully cured, removing the multiple material that covers in step 1, and optics shielding window surface is carried out clear Reason.
2. a kind of guard method for optics shielding window exposed electrode according to claim 1, it is characterised in that: step The shell in the non-metal electrode region of optics shielding window and assembly optics shielding window is carried out covering multiple detailed process in 1 Are as follows: stickup covering is carried out to the non-electrode region of optical window using no glue adhesive tape, using no glue adhesive tape or U.S. line paper to assembly light The shell for learning shielding window carries out stickup covering, only reserves electrode zone to be coated;Adhesive tape is compressed, guarantees to paste seamless;Adhesive tape it Between gap carried out filling out envelope with shellac varnish.
3. a kind of guard method for optics shielding window exposed electrode according to claim 1, it is characterised in that: step Alcohol, ether mixed liquor are dipped in by the electrode wiped clean of exposing with absorbent cotton in 3, remove greasy dirt, sweat stain or foreign matter on electrode.
4. a kind of guard method for optics shielding window exposed electrode according to claim 3, it is characterised in that: step Alcohol ether volume ratio is 7:3 in 3.
5. a kind of guard method for optics shielding window exposed electrode according to claim 2, it is characterised in that: step Remove in 6 in step 1 cover multiple material after, wipe shellac varnish remained on surface with alcohol.
CN201910037286.3A 2019-01-15 2019-01-15 Protection method for exposed electrode of optical shielding window Active CN109807037B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110802521A (en) * 2019-11-15 2020-02-18 贵州航天南海科技有限责任公司 Local sand blasting method for part
CN111687016A (en) * 2020-07-31 2020-09-22 广西玉柴机器股份有限公司 Paint spraying and shielding method and tool for bearing surface of threaded hole of engine part

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101345285A (en) * 2007-07-12 2009-01-14 天津市津南区凯达电子有限公司 Low-power consumption magnetosensitive element for telemetering water meter and production technique thereof
CN104837326A (en) * 2015-05-21 2015-08-12 哈尔滨工业大学 Method for manufacturing electromagnetic shielding curved surface optical window with metal mesh structure
CN107913833A (en) * 2017-11-28 2018-04-17 广东创瑜机电工程有限公司 A kind of production method of novel electric control cabinet
CN109099832A (en) * 2018-08-21 2018-12-28 华东理工大学 Strain transducer and its manufacturing method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101345285A (en) * 2007-07-12 2009-01-14 天津市津南区凯达电子有限公司 Low-power consumption magnetosensitive element for telemetering water meter and production technique thereof
CN104837326A (en) * 2015-05-21 2015-08-12 哈尔滨工业大学 Method for manufacturing electromagnetic shielding curved surface optical window with metal mesh structure
CN107913833A (en) * 2017-11-28 2018-04-17 广东创瑜机电工程有限公司 A kind of production method of novel electric control cabinet
CN109099832A (en) * 2018-08-21 2018-12-28 华东理工大学 Strain transducer and its manufacturing method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110802521A (en) * 2019-11-15 2020-02-18 贵州航天南海科技有限责任公司 Local sand blasting method for part
CN110802521B (en) * 2019-11-15 2021-08-31 贵州航天南海科技有限责任公司 Local sand blasting method for part
CN111687016A (en) * 2020-07-31 2020-09-22 广西玉柴机器股份有限公司 Paint spraying and shielding method and tool for bearing surface of threaded hole of engine part

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