CN103309142A - Method for manufacturing seamless spherical screen by using ball bladder - Google Patents
Method for manufacturing seamless spherical screen by using ball bladder Download PDFInfo
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- CN103309142A CN103309142A CN2013101390433A CN201310139043A CN103309142A CN 103309142 A CN103309142 A CN 103309142A CN 2013101390433 A CN2013101390433 A CN 2013101390433A CN 201310139043 A CN201310139043 A CN 201310139043A CN 103309142 A CN103309142 A CN 103309142A
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- bladders
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- spherical shell
- ball curtain
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Abstract
The invention relates to a method for manufacturing a seamless spherical screen by using a ball bladder. The method comprises the steps of: (1) manufacturing the ball bladder in the shape of an entire ball and waxing on all the outer surface of the ball bladder to form a wax layer; (2) spraying a resin mixture to the surface of the wax layer on the ball bladder to manufacture a seamless spherical shell; (3) casing a flange on the ball mouth of the seamless spherical shell and then separating the seamless spherical shell from the ball bladder; and (4) spraying an imaging layer on the surface of the seamless spherical shell to form the seamless spherical screen. The method is used for manufacturing the seamless spherical screens of various sizes.
Description
Technical field
The present invention relates to a kind of method of making seamless ball curtain, especially utilize bladders to make the method for seamless ball curtain.
Background technology
Seamless ball curtain can be applied on the places such as large-scale exhibition room, science and technology center, bar and the advertising business.But the difficulty that is confined to process seamless ball curtain is larger, quality is difficult to control, and some hemisphere and Two bors d's oeuveres ball (two hemisphere are pieced together) are only used at present a lot of places.The whole ball that the method is made has obvious seam, affects drop shadow effect.Also have some seamless balls of making by the mode of rotational moulding, the seamless ball curtain that this rotational moulding method is made easily produces flaw, and is relatively more serious such as current mark, the phenomenons such as bubble, the inadequate rounding of spherical shell are arranged.In addition, the rotational moulding method needs making machine equipment, and the required equipment cost of superhuge ball curtain (diameter greater than 3 meters ball curtain) is high especially, can't use the method.
Summary of the invention
In view of the above problems, the object of the present invention is to provide a kind of method of utilizing bladders to make seamless ball curtain, but one-shot forming prepares seamless ball curtain, and obtain good image effect.
Particular content of the present invention is as follows:
Utilize bladders to make the method for seamless ball curtain, may further comprise the steps:
(1) bladders of a whole sphere of making is at all outer surfaces waxing formation wax layer of bladders;
(2) seamless spherical shell is made on the described wax layer surface that resin compound is sprayed on the bladders;
(3) at the ball mouth place of seamless spherical shell suit flange, then separate seamless spherical shell and bladders;
(4) the surface spraying imaging layer at described seamless spherical shell consists of seamless ball curtain.
Described step (3) refers to described seamless spherical shell is separated along described wax layer with described bladders.
The described seamless spherical shell that the described step of polishing (3) separation obtains is to remove cut.
Dumb light after the inside surface of bladders sprays dilution equably coats with lacquer to eliminate halation.
Resin compound is the unsaturated polyester system described in the step (2), comprises unsaturated polyester, unsaturated monomer, the first hardening agent and promoter;
Described the first hardening agent is hyperis, cyclohexanone peroxide, methyl ethyl ketone peroxide or benzoyl peroxide;
Described promoter is cobalt naphthenate, cobalt iso-octoate or tertiary amine.
Described unsaturated polyester is the polycondensation product of unsaturated dicarboxylic acid and polyvalent alcohol, and this moment, described unsaturated monomer was described unsaturated dicarboxylic acid; Perhaps, described unsaturated polyester is one or more the reaction product in unsatured epoxy resin and dicarboxylic acids, the acrylic or methacrylic acid, and this moment, described unsaturated monomer was described unsatured epoxy resin.
Resin compound is epoxy-resin systems described in the step (2), comprises epoxy resin and the second hardening agent;
Described the second hardening agent is selected from fatty amine, cycloaliphatic amines, aromatic amine and their modifier, can also be organic acid anhydride class or organic hydrazides.
Described epoxy resin is bisphenol A type epoxy resin, bisphenol f type epoxy resin, bisphenol-A epoxy resin, A Hydrogenated Bisphenol A F type epoxy resin, glycidyl ester type epoxy resin and the monobasic of fatty alcohol or one or more in the polynary glycidol ether.
Resin compound is the urethane resin system described in the step (2), comprises A component and B component, and described A component is isocyanates, and described B component is polyvalent alcohol or polyamine.
Described isocyanates can be aromatic isocyanate, alicyclic isocyanate, aliphatic isocyanates and modified product thereof or its potpourri;
Described polyvalent alcohol is polyether glycol or polyester polyol;
Described polyamine is fatty amine, cycloaliphatic amines or aromatic amine.
The projection ball's curtain that uses spraying method of the present invention to obtain has following advantage: 1, seamless spherical shell surfaces externally and internally is very smooth, can not carry out grinding process; 2, the transparency of seamless spherical shell is good, quality is good, qualification rate high (more than 95%); 3, bladders is hollow bladders, can do very thinly, and bladders easily separates with seamless spherical shell; 4, the resin film curing rate is fast, has improved widely production efficiency; 5, the imaging layer that other spray gets on spherical shell is even, can not produce the flaws such as current mark, the whole drop shadow effect of improving.In addition, can effectively slow down the material aging that ultraviolet ray causes.
Description of drawings
Fig. 1 is the schematic diagram of each parts in the spherical shell spraying operation.
Fig. 2 is the shape schematic diagram of bladders.
Reference numeral lists as follows:
The 1-spherical shell; 2-ball mouth; The flange that 3-ball curtain is sheathed.
Embodiment
Below, further specify content of the present invention with embodiment, but protection scope of the present invention is not limited in embodiment.Those skilled in the art in the situation that do not deviate from the other changes and modifications that the present invention spirit and protection domain are made, still is included within the protection domain of the present invention.
Embodiment 1:
Pre-treatment: at first, make the bladders of a whole sphere, described bladders can be the hollow ball courage, smears equably #8 wax with clean cotton on all outer surfaces of bladders, and the number of times of waxing is generally smeared twice according to the size of bladders and the effect adjustment of smearing.
Preparation resin compound: get the adjacent benzene type of 1000 weight portions unsaturated polyester resin, add first the promoter (cobalt iso-octoate) of 1 weight portion and the hardening agent (cyclohexanone peroxide) of 1 weight portion, stir.
Promoter also can be selected cobalt naphthenate or tertiary amine, and hardening agent also can be selected hyperis, benzoyl peroxide or methyl ethyl ketone peroxide etc.
Add ultraviolet absorber 5 weight portions, to delay the xanthochromia speed of resin system.
The ratio of above-mentioned each component changes and can change according to seasonal variations or room temperature, also can adjust according to the requirement of curing rate the ratio of each component.
The spraying operation: the equatorial direction along bladders sprays the above-mentioned resin compound for preparing equably first, then spray equably one time perpendicular to equatorial direction, so that the outside surface of whole bladders covers one deck resin compound equably (about the direction of spray ball, the operator can Self-adjustment, as long as can reach the requirement that the resin compound of spraying is evenly distributed).After the resin of last spraying solidifies fully, repeat again the spraying operation, so for several times, until the resin of spraying reaches weight or the thickness of expection.
Mounting flange: 1, the bladders with the ball mouth place of spherical shell cuts, and makes a fiberglass stiffening ring close with the ball mouth diameter of spherical shell, stiffening ring is installed to the ball mouth inner face of spherical shell with above-mentioned resin compound.2, do a glass fiber reinforced plastic flange with the flange mould, outside surface can be used the black gel coat.3, with adjacent benzene type unsaturated polyester resin, promoter (cobalt iso-octoate) and talcum powder modulating mixture, add at last an amount of hardening agent (cyclohexanone peroxide), be filled in rapidly the inboard of fiberglass flange after stirring, then be put into exactly the ball mouth in the flange, lightly spherical shell is down pressed, so that unnecessary potpourri overflows.After the potpourri of ball mouth parched fully, the potpourri that the ball mouth is unnecessary was removed, and polishes smooth.
Stripping operation a: crack is pried open from spherical shell in the bladders edge with thin blade; Fill at leisure in the crack with Steel Ruler, so that produce a space between bladders and the spherical shell, in the position at Steel Ruler place bladders is cut an openning with cutting machine; Steel Ruler is released carefully, get other local repetitive operations repeatedly, until bladders is cut into multi-disc.The bladders of chopping is pulled out in spherical shell carefully, and the surfaces externally and internally of spherical shell is rinsed well and wiped clean.If inside surface has obvious cut, can use respectively #360, cut is got rid of in the sand papering of #600.
Also can remove by the following method halation in case of necessity: dumb light lacquer (volume ratio of thinning agent and dumb light lacquer is 1: 3) is transferred evenly with thinning agent, spray equably the dumb light lacquer with clean spray gun at the inside surface of spherical shell, after dispersing Deng coating cloud, be put on the testing jig and test, if also have halation phenomenon, continue the place spray dumb light lacquer of halation is arranged, until eliminate halation fully.
Spraying imaging layer: obtain potpourri with light varnish conditioning function powder, proportioning is 1 gram function powder (granularity is about 1 micron titania powder): 6 milliliters of light varnish, with mulser the potpourri emulsify at a high speed was sheared about 5 minutes, with the complete wiped clean of the outside surface of spherical shell, the potpourri of described emulsify at a high speed is sprayed to equably the outside surface of spherical shell with dust removing cloth with spray gun; After the surface done substantially, spray contained the aforementioned potpourri of function powder again.The spraying number of times depends on the size of spherical shell and the weight of spraying function powder; After the outside surface drying, spherical shell is put on the testing jig tests, if also have the phenomenon of light leak, also to continue to spray the function powder, until imaging evenly and fully without light leakage phenomena, obtains seamless ball curtain.
Embodiment 2:
Pre-treating method is with embodiment 1.
Preparation epoxy resin composition A:
Liquid bisphenol A epoxy resin 400 weight portions;
Liquid bisphenol f type epoxy resin 250 weight portions;
Isosorbide-5-Nitrae butanediol diglycidyl ether 50 weight portions;
Fully mix and obtain resin compound A.
Preparation curing agent mixture B:
M-xylene diamine 100 weight portions;
Triethylene tetramine 20 weight portions;
Polyetheramine 60 weight portions;
Fully mix and obtain curing agent mixture B.
Get 700 parts by weight resin potpourri A, add the curing agent mixture B of 300 weight portions, add again the defoamer of 20 weight portions, stir.
In above-mentioned system, add ultraviolet absorber 5 weight portions, obtain target mixture, to delay the xanthochromia speed of resin system.
The spraying operation: method of operating is identical with embodiment 1, different is, need after the target mixture of bladders spraying the present embodiment ball heating under 55～65 ℃, be heating and curing etc. repeating again the spraying operation after the target mixture curing, then delivering under the aforementioned temperature scope.So repeated multiple times, until the resin of spraying reaches weight or the thickness of expection.
Stripping operation is identical with embodiment 1 with the operation of spraying imaging layer.
Embodiment 3:
Method of operating is identical with embodiment 1, and the prescription of the resin compound of the preparation that difference is is different, and is as follows:
Unsaturated polyester 1000 weight portions;
Annotate: the addition of hardening agent and promoter determines the curing rate of resin.Add 2 weight portion hardening agent and promoter, the operating environment that suitable temperature is lower (be lower than room temperature, be higher than 10 degrees centigrade).
Embodiment 4:
Method of operating is identical with embodiment 2, and different is the prescription difference of the resin compound of preparation, as follows:
Epoxy resin composition:
Liquid bisphenol A epoxy resin 500 weight portions;
Bisphenol-A epoxy resin 240 weight portions;
Butyl glycidyl ether 60 weight portions.
Curing agent mixture:
Cyclohexanediamine 100 weight portions;
Diethylenetriamine 30 weight portions;
Polyetheramine 70 weight portions;
Embodiment 5:
Method of operating is identical with embodiment 1, and the prescription of the resin compound of the preparation that difference is is different, and is as follows:
Unsaturated polyester 1000 weight portions;
Ultraviolet absorber 4 weight portions;
Promoter 1.5 weight portions;
Hardening agent 1.5 weight portions;
Annotate: the amount of hardening agent and promoter, the curing rate of decision resin.The hardening agent and the promoter that add 1.5 weight portions, the operating environment of suitable room temperature.
Embodiment 6:
Method of operating is identical with embodiment 2, and the prescription of the resin compound of the preparation that difference is is different, and is as follows:
Epoxy resin composition:
Bisphenol f type epoxy resin 550 weight portions;
Bisphenol-A epoxy resin 100 weight portions;
1,6 hexanediol diglycidyl ether, 50 weight portions;
Curing agent mixture:
Isophorone diamine 100 weight portions;
Making methylpentamethylenediamine diamine 80 weight portions;
Polyetheramine 70 weight portions;
Ultraviolet absorber 4 weight portions;
Embodiment 7:
Method of operating is identical with embodiment 2, and the prescription of the resin compound of the preparation that difference is is different, and is as follows:
Polyether glycol 200 weight portions;
Polyester polyol 300 weight portions;
Modification alicyclic isocyanate 500 weight portions
Ultraviolet absorber 3.5 weight portions;
The evaluation of the film layer of the seamless ball curtain (projection ball) that embodiment 1,3 and 5 obtains is as follows:
Embodiment 1 medium ultraviolet absorbing agent weight portion is 5, because ultraviolet absorber is originally as pale yellow powder, if addition is crossed the color that senior general affects resin compound.This addition (5 weight portion) can guarantee that the ball curtain is controlled at 3% to 5% at the aging speed in early stage (in 2 years), and the speed aging in the later stage can slow down gradually.The weight portion of promoter and hardening agent all is 1, and the curing rate of resin compound is slow at normal temperatures, estimates just can solidify in 20 minutes.So it is better at weather hotter summer (the perhaps higher operating environment of temperature) operating effect to fill a prescription.Projection ball's material that this prescription is made is more transparent.Preferably anti-strike capability: 4～7Nm/m2 is arranged, stronger tensile strength/Mpa:10～20 are arranged, relatively poor bending strength/MPa:3～7.
Embodiment 5 medium ultraviolet absorbing agent weight portions are 4.Substantially do not affect the color of resin compound.There is the ability of very strong anti-ultraviolet aging in the projection ball of spray this moment, can guarantee that the ball curtain is controlled at 3% to 5% at the aging speed in early stage (in 2 years), and the speed aging in the later stage can slow down gradually.Promoter and hardening agent weight portion all are 1.5, and the fixed line speed of resin compound is at normal temperatures than moderate, estimate just can solidify in 7～8 minutes.So should nice and cool spring and autumn operate better at weather by prescription.Projection ball's material that this prescription is made is more transparent.Preferably anti-strike capability: 4～7Nm/m is arranged
2, stronger tensile strength/Mpa:10～20 are arranged, relatively poor bending strength/MPa:3～7.
The evaluation of the image effect of the seamless ball curtain (projection ball) that embodiment 1,3 and 5 obtains is as follows:
The transparency of the seamless ball curtain that the method is made is fine, and transmitance reaches more than 80%; Imaging clearly; Better 300: 1 of contrast, visual angle are 120 degree; Color and luster is more even.
The evaluation of the film layer of the seamless ball curtain (projection ball) that embodiment 2,4,6 and 7 obtains is as follows:
Embodiment 4 medium ultraviolet absorbing agent weight portions are 3, do not affect the color of resin compound, the projection ball of spray this moment still has the ability of stronger anti-ultraviolet aging, can guarantee that the ball curtain is controlled at 3% to 5% at the aging speed in early stage (in 2 years), and the speed aging in the later stage can slow down gradually.Epoxy resin composition 700 weight portions+curing agent mixture 300 weight portions.The spherical shell that this prescription is made, plasticity descends to some extent, and is slightly somewhat crisp, is not suitable for colder that use winter again.If again increase the amount of Resin A material, with changing the characteristic of resin, so that the spherical shell of producing is very crisp, easily break.Preferably anti-strike capability: 10～14Nm/m2 is arranged, tensile strength/Mpa:46～70, bending strength/MPa:90.0～120.0, compressive strength/MPa:87.0～174.0.
Embodiment 6 medium ultraviolet absorbing agent weight portions are 4.Substantially do not affect the color of resin compound, there is the ability of stronger anti-ultraviolet aging in the projection ball of spray this moment, can guarantee that the ball curtain is controlled at 3% to 5% at the aging speed in early stage (in 2 years), and the speed aging in the time of back can slow down gradually.Epoxy resin composition 700 weight portions+curing agent mixture 300 weight portions.The spherical shell that this prescription is produced has preferably plasticity, is not easy to break, and preferably hardness is also arranged simultaneously.Preferably anti-strike capability: 10～14Nm/m2 is arranged, tensile strength/Mpa:46～70, bending strength/MPa:90.0～120.0, compressive strength/MPa:87.0～174.0.
Embodiment 7 medium ultraviolet absorbing agent weight portions are 3.5.Substantially do not affect the color of resin compound, there is the ability of stronger anti-ultraviolet aging in the projection ball of spray this moment, can guarantee that the ball curtain is controlled at 3% to 5% at the aging speed in early stage (in 2 years), and the speed aging in the time of back can slow down gradually.Polyether glycol 200 weight portions, polyester polyol 300 weight portions, modification alicyclic isocyanate 500 weight portions.The spherical shell that this prescription is produced has preferably plasticity, is not easy to break, and preferably hardness is also arranged simultaneously; In the high environment of humidity, bubble easily appears in spherical shell.Superpower anti-strike capability: 10～26Nm/m2 is arranged, tensile strength/Mpa:43～70.
The evaluation of the image effect of the seamless ball curtain (projection ball) that above-described embodiment 2,4,6 and 7 obtains is as follows:
The transparency of the seamless ball curtain that the method is made is fine, and transmitance reaches more than 80%; Imaging clearly; Better 300: 1 of contrast; The visual angle is about 120 degree; Color and luster is more even.
Claims (10)
1. utilize bladders to make the method for seamless ball curtain, it is characterized in that, may further comprise the steps:
(1) bladders of a whole sphere of making is at all outer surfaces waxing formation wax layer of bladders;
(2) seamless spherical shell is made on the described wax layer surface that resin compound is sprayed on the bladders;
(3) at the ball mouth place of seamless spherical shell suit flange, then separate seamless spherical shell and bladders;
(4) the surface spraying imaging layer at described seamless spherical shell consists of seamless ball curtain.
2. the method for utilizing bladders to make seamless ball curtain according to claim 1 is characterized in that, described step (3) refers to described seamless spherical shell is separated along described wax layer with described bladders.
3. the method for utilizing bladders to make seamless ball curtain according to claim 2 is characterized in that, the described seamless spherical shell that the described step of polishing (3) separation obtains is to remove cut.
4. the method for utilizing bladders to make seamless ball curtain according to claim 2 is characterized in that, the dumb light after the inside surface of bladders sprays dilution equably coats with lacquer to eliminate halation.
5. the method for utilizing bladders to make seamless ball curtain according to claim 1 is characterized in that, resin compound is the unsaturated polyester system described in the step (2), comprises unsaturated polyester, unsaturated monomer, the first hardening agent and promoter;
Described the first hardening agent is hyperis, cyclohexanone peroxide, methyl ethyl ketone peroxide or benzoyl peroxide;
Described promoter is cobalt naphthenate, cobalt iso-octoate or tertiary amine.
6. the method for utilizing bladders to make seamless ball curtain according to claim 5 is characterized in that, described unsaturated polyester is the polycondensation product of unsaturated dicarboxylic acid and polyvalent alcohol, and this moment, described unsaturated monomer was described unsaturated dicarboxylic acid; Perhaps, described unsaturated polyester is one or more the reaction product in unsatured epoxy resin and dicarboxylic acids, the acrylic or methacrylic acid, and this moment, described unsaturated monomer was described unsatured epoxy resin.
7. the method for utilizing bladders to make seamless ball curtain according to claim 1 is characterized in that, resin compound is epoxy-resin systems described in the step (2), comprises epoxy resin and the second hardening agent;
Described the second hardening agent is selected from fatty amine, cycloaliphatic amines, aromatic amine and their modifier, can also be organic acid anhydride class or organic hydrazides.
8. the method for utilizing bladders to make seamless ball curtain according to claim 7, it is characterized in that, described epoxy resin is bisphenol A type epoxy resin, bisphenol f type epoxy resin, bisphenol-A epoxy resin, A Hydrogenated Bisphenol A F type epoxy resin, glycidyl ester type epoxy resin and the monobasic of fatty alcohol or one or more in the polynary glycidol ether.
9. the method for utilizing bladders to make seamless ball curtain according to claim 1, it is characterized in that, resin compound is the urethane resin system described in the step (2), comprises A component and B component, described A component is isocyanates, and described B component is polyvalent alcohol or polyamine.
10. the method for utilizing bladders to make seamless ball curtain according to claim 9 is characterized in that, described isocyanates can be aromatic isocyanate, alicyclic isocyanate, aliphatic isocyanates and modified product thereof or its potpourri;
Described polyvalent alcohol is polyether glycol or polyester polyol;
Described polyamine is fatty amine, cycloaliphatic amines or aromatic amine.
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| CN2013101390433A CN103309142A (en) | 2013-04-22 | 2013-04-22 | Method for manufacturing seamless spherical screen by using ball bladder |
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| CN2013101390433A CN103309142A (en) | 2013-04-22 | 2013-04-22 | Method for manufacturing seamless spherical screen by using ball bladder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597706A (en) * | 2015-02-03 | 2015-05-06 | 深圳市蓝宝石球显科技有限公司 | Preparation method of soft projected spherical screen and soft projected spherical screen |
| CN104950563A (en) * | 2015-03-30 | 2015-09-30 | 王建明 | Multichannel-projection aiming-training hemispherical-screen system, and manufacture method and application thereof |
| CN114942564A (en) * | 2022-06-07 | 2022-08-26 | 北京领为军融科技有限公司 | Large-view-field rear projection system and rear projection spherical screen for air combat confrontation simulation training |
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| CN101880443A (en) * | 2010-07-08 | 2010-11-10 | 株洲时代新材料科技股份有限公司 | Low-viscosity epoxy resin system for resin transfer molding and preparation and using method thereof |
| CN102806620A (en) * | 2011-06-03 | 2012-12-05 | 赵东林 | Manufacturing method for seamless projection spherical curtain and manufacturing device thereof |
| CN103091963A (en) * | 2011-10-27 | 2013-05-08 | 无锡羿飞科技有限公司 | Manufacturing method for seamless ball screen |
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2013
- 2013-04-22 CN CN2013101390433A patent/CN103309142A/en active Pending
Patent Citations (4)
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|---|---|---|---|---|
| CN1053248A (en) * | 1990-01-12 | 1991-07-24 | 陶氏化学公司 | Inhibitor concentrate and can stablize the unsaturated thermosetting resin and the solidified product of storage |
| CN101880443A (en) * | 2010-07-08 | 2010-11-10 | 株洲时代新材料科技股份有限公司 | Low-viscosity epoxy resin system for resin transfer molding and preparation and using method thereof |
| CN102806620A (en) * | 2011-06-03 | 2012-12-05 | 赵东林 | Manufacturing method for seamless projection spherical curtain and manufacturing device thereof |
| CN103091963A (en) * | 2011-10-27 | 2013-05-08 | 无锡羿飞科技有限公司 | Manufacturing method for seamless ball screen |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104597706A (en) * | 2015-02-03 | 2015-05-06 | 深圳市蓝宝石球显科技有限公司 | Preparation method of soft projected spherical screen and soft projected spherical screen |
| CN104597706B (en) * | 2015-02-03 | 2017-01-18 | 深圳市蓝宝石球显科技有限公司 | Preparation method of soft projected spherical screen and soft projected spherical screen |
| CN104950563A (en) * | 2015-03-30 | 2015-09-30 | 王建明 | Multichannel-projection aiming-training hemispherical-screen system, and manufacture method and application thereof |
| CN114942564A (en) * | 2022-06-07 | 2022-08-26 | 北京领为军融科技有限公司 | Large-view-field rear projection system and rear projection spherical screen for air combat confrontation simulation training |
| CN114942564B (en) * | 2022-06-07 | 2024-05-28 | 北京领为军融科技有限公司 | Large-view-field rear projection system for air combat countermeasure simulation training and rear projection ball curtain |
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Application publication date: 20130918 |