CN110126316B - Method for manufacturing hard rear projection spherical screen - Google Patents
Method for manufacturing hard rear projection spherical screen Download PDFInfo
- Publication number
- CN110126316B CN110126316B CN201910408644.7A CN201910408644A CN110126316B CN 110126316 B CN110126316 B CN 110126316B CN 201910408644 A CN201910408644 A CN 201910408644A CN 110126316 B CN110126316 B CN 110126316B
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- optical resin
- component optical
- rear projection
- release agent
- driving motor
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims description 4
- 229920005989 resin Polymers 0.000 claims abstract description 32
- 239000011347 resin Substances 0.000 claims abstract description 32
- 230000003287 optical effect Effects 0.000 claims abstract description 30
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000003973 paint Substances 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 6
- 238000000149 argon plasma sintering Methods 0.000 claims abstract description 3
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 20
- 239000003822 epoxy resin Substances 0.000 claims description 15
- 229920000647 polyepoxide Polymers 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000006247 magnetic powder Substances 0.000 claims description 9
- 239000011521 glass Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 6
- 239000003085 diluting agent Substances 0.000 claims description 5
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 4
- 238000009966 trimming Methods 0.000 claims description 4
- 230000008033 biological extinction Effects 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims description 3
- 238000003384 imaging method Methods 0.000 claims description 3
- 238000005728 strengthening Methods 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 230000009471 action Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000003892 spreading Methods 0.000 claims description 2
- 230000007480 spreading Effects 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000007665 sagging Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229920006305 unsaturated polyester Polymers 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
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- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000012495 reaction gas Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Abstract
The invention discloses a manufacturing method of a hard rear projection spherical screen, which belongs to the technical field of manufacturing of projection spherical screens and comprises the following steps: s1: manufacturing a device for forming a seamless transparent sphere; s2: preparing a water-based characteristic release agent, mounting a spherical die with an opening at the top on a universal rotating unit, and injecting the prepared water-based characteristic release agent into the die; s3: preparing a bi-component optical resin, adding the bi-component optical resin into a mold, starting hot air, and starting a universal rotating unit to enable the bi-component optical resin to uniformly sag on a release agent drying film; s4: preparing water-based light scattering screen paint, adding the paint into the transparent seamless sphere polished in the step S3, wherein the manufactured hard rear projection spherical screen has good integrity and no obvious seam situation; the hard rear projection spherical screen is polished and trimmed, the surface is smooth, and the texture of the hard rear projection spherical screen is good.
Description
Technical Field
The invention relates to the technical field of manufacturing of projection spherical screens, in particular to a manufacturing method of a hard rear projection spherical screen.
Background
The hard rear-projection spherical screen is rear-projected in the spherical screen by utilizing the projected optical lens projection technology, and the audience can watch the deduced picture around the screen sphere by 360 degrees, so that the picture definition is high and the interactive function is realized. The method is widely applied to exhibition halls, science and technology museums, school teaching, geological deductions, enterprise culture display, families, entertainment places and the like, and is popular among people.
The existing hard rear projection spherical screen manufacturing technology is characterized in that: the transparent organic glass is combined by two hemispheres, the organic glass is put into a heating box to soften the organic glass, and the organic glass is quickly fixed at the lower end of a blowing drum die after being taken out for air entrainment and blowing molding, and the defect of obvious seam and poor display effect is overcome; the multi-flap PVC spliced ball curtain and the injection molding two-half spliced balls have the defects of obvious splicing seams and large brittleness of the seamless unsaturated polyester balls formed by casting.
Disclosure of Invention
The invention aims to provide a manufacturing method of a hard rear projection spherical screen, which aims to solve the problems that the defects of the two hemispheres of transparent organic glass, the multi-petal PVC spliced spherical screen and the injection molding of two half spliced spheres are obvious splicing seams and the problem of large brittleness of the cast seamless unsaturated polyester spheres.
In order to achieve the above purpose, the present invention provides the following technical solutions: a manufacturing method of a hard rear projection spherical screen comprises the following steps:
S1: manufacturing a device for forming a seamless transparent sphere, wherein the device is a universal rotating unit;
S2: preparing a water-based characteristic release agent, mounting a spherical die with an opening at the top on a universal rotating unit, injecting the prepared water-based characteristic release agent into the die, and starting the universal rotating unit to uniformly flow-coat the water-based characteristic release agent on the inside of the die, and curing the water-based characteristic release agent to form a release agent drying film;
s3: preparing a bi-component optical resin, adding the bi-component optical resin into a mold, starting hot air, starting a universal rotating unit, enabling the bi-component optical resin to uniformly flow on a release agent drying film, under the action of the hot air, enabling the bi-component optical resin to accelerate chemical reaction, solidifying to obtain a first layer of transparent seamless sphere, repeatedly adding the bi-component optical resin into the mold, solidifying the bi-component optical resin under the hot air to obtain a transparent seamless sphere with a required thickness, unloading the mold, cooling, opening the mold, taking out the transparent seamless sphere with the required thickness, trimming flash, bonding a flange on the transparent seamless sphere after trimming flash, and polishing the transparent seamless sphere after bonding the flange;
s4: and (3) preparing a water-based light scattering screen coating, adding the coating into the transparent seamless sphere polished in the step (S3), uniformly spreading the coating on the inner wall of the sphere by adopting a curtain type flow coating method, curing to form a screen imaging layer, and carrying out extinction strengthening protection treatment on the outer surface of the transparent seamless sphere to obtain the rear projection spherical screen.
Preferably, the mold in S2 is a mold made of glass fiber reinforced plastic or aluminum alloy, and the opening at the top of the mold is a circular opening with a diameter of 25cm-35 cm.
Preferably, the formulation of the two-component optical resin in S3 comprises the following components in mass ratio: 90-110 parts of bisphenol A type E epoxy resin A, 45-55 parts of bisphenol A type E epoxy resin B, 12-18 parts of epoxy resin reactive diluent and 0.1% of ultraviolet absorber by mass of the total mass of the double-component optical resin.
Preferably, the preparation method of the bi-component optical resin comprises the steps of adding an epoxy resin reactive diluent into a dispersing refiner with the rotating speed set to 1500r/min, adding a bisphenol A type E epoxy resin A component, stirring and mixing for 1-2h, taking out and placing in a container, adding a bisphenol A type E epoxy resin B component and an ultraviolet absorber into the container, and uniformly stirring by using a glass rod to obtain the bi-component optical resin.
Preferably, the universal rotating unit comprises a base, install first driving motor in the upper surface of base, first driving motor's output shaft bottom is provided with rotatory frame, rotatory frame's lower surface supports has the ball holding ring, the ball holding ring passes through the pillar and supports on the base, rotatory frame's inner chamber is connected with rotatory inside casing through horizontal pivot, second driving motor is installed through the motor cabinet to rotatory frame's right side wall upper end, second driving motor's output shaft passes through the shaft coupling and is connected with horizontal pivot, all install the magnetic powder stopper on the outer wall of first driving motor's output shaft, second driving motor's the output shaft, magnetic powder stopper on first driving motor, second driving motor passes through branch and is connected with pillar, motor cabinet respectively, install hot air apparatus on rotatory inside casing's the inner wall.
Preferably, the hot air device comprises an outer shell fixedly connected to the inner wall of the rotary inner frame through screws, a hot air box is fixedly connected to the left lower side of an inner cavity of the outer shell through screws, the upper side and the lower side of the right wall of the hot air box are respectively connected with an air inlet of a fan and an outlet of a resistance wire heating box through pipelines, an air outlet pipe and an air inlet pipe are respectively connected to an air outlet of the fan and an inlet of the resistance wire heating box, and the air outlet pipe and the air inlet pipe penetrate through the right side wall of the outer shell.
Compared with the prior art, the invention has the beneficial effects that:
1) The manufactured hard rear projection spherical screen has better integrity, no obvious seam condition and balanced overall structural strength;
2) The hard rear projection spherical screen is polished and trimmed, the surface is smooth, and the texture of the hard rear projection spherical screen is good;
3) The hot air in the hot air device can be recycled, energy is saved, the magnetic powder brake can be used at any position for braking, the problem that the weight center is unbalanced in the installation of the die due to the rotation inertia is effectively solved, the die moves uniformly, and the resin can be spread out in the die.
Drawings
FIG. 1 is a schematic view of a universal rotary unit according to the present invention;
Fig. 2 is a schematic structural view of the hot air device of the present invention.
In the figure: 1a base, 2a first driving motor, 3a rotating outer frame, 4 ball supporting rings, 5 support posts, 6 motor bases, 7 a second driving motor, 8 magnetic powder brakes, 9 a rotating inner frame, 10 dies, 11 hot air devices, 111 an outer shell, 112 hot air boxes, 113 fans, 114 resistance wire heating boxes, 115 air inlet pipes and 116 air outlet pipes.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Examples:
Referring to fig. 1-2, the present invention provides a technical solution: a manufacturing method of a hard rear projection spherical screen comprises the following steps:
S1: manufacturing a device for forming a seamless transparent sphere, wherein the device is a universal rotating unit;
S2: preparing a water-based characteristic release agent, wherein the water-based characteristic release agent is environment-friendly, the risk of being damaged is not easy to occur during operation, sagging property is good and uniform when the bi-component optical resin is in reaction gas contact, when the bi-component optical resin sagging release agent film, the release agent film has good adsorptivity to the bi-component optical resin and does not fall off, the release agent film does not react with the resin, after the spherical body is released, the release agent film still remains on the die 10, the die 10 which is spherical and is provided with an opening at the top is arranged on a universal rotating unit (the die 10 is a glass fiber reinforced plastic die, and the opening at the top of the die 10 is a circular opening with the diameter of 25cm-35 cm), the circle centers between the die 10 and the rotating inner frame 9 are overlapped, so that shaking does not occur when the rotating inner frame 9 drives the die 10 to rotate, the prepared water-based characteristic release agent is injected into the die 10, and the universal rotating unit is started to enable the water-based characteristic release agent to be evenly coated on the inner part of the die 10, and after the water-based characteristic release agent is solidified, so that the release agent drying film is formed;
s3: preparing a bi-component optical resin (the formula of the bi-component optical resin comprises, by mass, 100 parts of a bisphenol A type E epoxy resin A component, 52 parts of a bisphenol A type E epoxy resin B component, 15 parts of an epoxy resin reactive diluent, and 0.1% of the total mass of the bi-component optical resin as an ultraviolet absorber);
S4: the water-based diffusion screen paint is prepared, the main film forming material of the water-based diffusion screen paint is polyurethane, the adhesive force is strong, the inclusion bearing property of the diffusion agent is good, the use is convenient, the paint is added into the transparent seamless sphere polished in the step S3, the paint is uniformly spread on the inner wall of the sphere by adopting a curtain type flow coating method, a screen imaging layer is formed after solidification, and the outer surface of the transparent seamless sphere is subjected to extinction strengthening protection treatment, so that the rear projection spherical screen is obtained.
The universal rotating unit comprises a base 1, a first driving motor 2 is installed in the upper surface of the base 1, a rotating outer frame 3 is arranged at the bottom end of an output shaft of the first driving motor 2, a ball supporting ring 4 is supported on the lower surface of the rotating outer frame 3, the ball supporting ring 4 is supported on the base 1 through a supporting post 5, an inner cavity of the rotating outer frame 3 is connected with a rotating inner frame 9 through a transverse rotating shaft, a second driving motor 7 is installed at the upper end of the right side wall of the rotating outer frame 3 through a motor base 6, an output shaft of the second driving motor 7 is connected with the transverse rotating shaft through a coupler, magnetic powder brakes 8 are installed on the outer walls of the output shafts of the first driving motor 2 and the second driving motor 7, the magnetic powder brakes 8 on the first driving motor 2 and the second driving motor 7 are respectively connected with the supporting post 5 and the motor base 6 through supporting posts, and a hot air device 11 is installed on the inner wall of the rotating inner frame 9.
The hot air device 11 comprises an outer shell 111 fixedly connected to the inner wall of the rotary inner frame 9 through screws, a hot air box 112 is fixedly connected to the left lower side of an inner cavity of the outer shell 111 through screws, the upper side and the lower side of the right wall of the hot air box 112 are respectively connected with an air inlet of a fan 113 and an outlet of a resistance wire heating box 114 through pipelines, an air outlet of the fan 113 and an inlet of the resistance wire heating box 114 are respectively connected with an air outlet pipe 116 and an air inlet pipe 115, and the air outlet pipe 116 and the air inlet pipe 115 penetrate through the right side wall of the outer shell 111.
Working principle: the die 10 is coaxially arranged on the rotary inner frame 9, and the second driving motor 7 and the first driving motor 2 are variable frequency driving motors, so that the rotating speed of the variable frequency driving motors can be controlled, and the die 10 is driven to rotate in a universal way by the cooperation of the rotary outer frame 3 and the rotary inner frame 9;
Through the setting of magnetic powder brake 8, can the optional position brake, the effectual condition that causes the unbalance of unbalance center in the installation of mould 10 of rotatory inertia, make mould 10 even motion, thereby can make the resin spread out in mould 10, when needs provide hot-blast, connect intake pipe 115 and outlet duct 116 on the interface of mould 10, resistance wire heating box 114 heats its inside air, fan 113 is taken out the air in the hot bellows 112 and is got into mould 10 through outlet duct 116, produce the negative pressure in the hot-blast box 112, absorb hot air to resistance wire heating box 114, the same reason resistance wire heating box 114 is through intake pipe 115 with the internal air suction of mould 10, thereby make the hot air get into in the mould 10, the air in the mould 10 flows back to in the hot-blast box 112, form the circulation, and the air temperature of backward flow is higher than ambient temperature, thereby reduce the electric energy that resistance wire heating box 114 used can reach the demand of normal output hot-blast, reach energy-conserving effect.
While the fundamental and principal features of the invention and advantages of the invention have been shown and described, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. A manufacturing method of a hard rear projection spherical screen is characterized in that: the method comprises the following steps:
S1: manufacturing a device for forming a seamless transparent sphere, wherein the device is a universal rotating unit;
S2: preparing a water-based characteristic release agent, mounting a spherical die with an opening at the top on a universal rotating unit, injecting the prepared water-based characteristic release agent into the die, and starting the universal rotating unit to uniformly flow-coat the water-based characteristic release agent on the inside of the die, and curing the water-based characteristic release agent to form a release agent drying film;
s3: preparing a bi-component optical resin, adding the bi-component optical resin into a mold, starting hot air, starting a universal rotating unit, enabling the bi-component optical resin to uniformly flow on a release agent drying film, under the action of the hot air, enabling the bi-component optical resin to accelerate chemical reaction, solidifying to obtain a first layer of transparent seamless sphere, repeatedly adding the bi-component optical resin into the mold, solidifying the bi-component optical resin under the hot air to obtain a transparent seamless sphere with a required thickness, unloading the mold, cooling, opening the mold, taking out the transparent seamless sphere with the required thickness, trimming flash, bonding a flange on the transparent seamless sphere after trimming flash, and polishing the transparent seamless sphere after bonding the flange;
s4: preparing a water-based light scattering screen paint, adding the paint into the transparent seamless sphere polished in the step S3, uniformly spreading the paint on the inner wall of the sphere by adopting a curtain type flow coating method, curing to form a screen imaging layer, and carrying out extinction strengthening protection treatment on the outer surface of the transparent seamless sphere to obtain a rear projection spherical screen;
The universal rotating unit comprises a base, a first driving motor is arranged in the upper surface of the base, a rotating outer frame is arranged at the bottom end of an output shaft of the first driving motor, a ball supporting ring is supported on the lower surface of the rotating outer frame and is supported on the base through a support column, a rotating inner frame is connected to an inner cavity of the rotating outer frame through a transverse rotating shaft, a second driving motor is arranged at the upper end of the right side wall of the rotating outer frame through a motor seat, an output shaft of the second driving motor is connected with the transverse rotating shaft through a coupler, magnetic powder brakes are arranged on the outer walls of the output shafts of the first driving motor and the second driving motor respectively, the magnetic powder brakes on the first driving motor and the second driving motor are connected with the support column and the motor seat through support columns, and a hot air device is arranged on the inner wall of the rotating inner frame;
The hot air device comprises an outer shell fixedly connected to the inner wall of the rotary inner frame through screws, a hot air box is fixedly connected to the left lower side of an inner cavity of the outer shell through screws, the upper side and the lower side of the right wall of the hot air box are respectively connected with an air inlet of a fan and an outlet of a resistance wire heating box through pipelines, an air outlet pipe and an air inlet pipe are respectively connected to an air outlet of the fan and an inlet of the resistance wire heating box, and the air outlet pipe and the air inlet pipe penetrate through the right side wall of the outer shell.
2. A method of manufacturing a rigid rear projection spherical screen according to claim 1, wherein: the die in the step S2 is made of glass fiber reinforced plastic or aluminum alloy, and the opening at the top of the die is a circular opening with the diameter of 25cm-35 cm.
3. A method of manufacturing a rigid rear projection spherical screen according to claim 1, wherein: the formula of the bi-component optical resin in the S3 comprises the following components in percentage by mass: 90-110 parts of bisphenol A type E epoxy resin A, 45-55 parts of bisphenol A type E epoxy resin B, 12-18 parts of epoxy resin reactive diluent and 0.1% of ultraviolet absorber by mass of the total mass of the double-component optical resin.
4. A method of manufacturing a rigid rear projection spherical screen according to claim 1 or 3, wherein: the preparation method of the bi-component optical resin comprises the steps of adding an epoxy resin reactive diluent into a dispersing refiner with the rotating speed set to 1500r/min, adding a bisphenol A type E epoxy resin component A, stirring and mixing for 1-2h, taking out and placing in a container, adding a bisphenol A type E epoxy resin component B and an ultraviolet absorber into the container, and uniformly stirring by using a glass rod to obtain the bi-component optical resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910408644.7A CN110126316B (en) | 2019-05-16 | Method for manufacturing hard rear projection spherical screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910408644.7A CN110126316B (en) | 2019-05-16 | Method for manufacturing hard rear projection spherical screen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110126316A CN110126316A (en) | 2019-08-16 |
| CN110126316B true CN110126316B (en) | 2024-06-21 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101585224A (en) * | 2009-06-18 | 2009-11-25 | 张�林 | Method for manufacturing reinforced seamless table tennis and manufacturing equipment 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 |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101585224A (en) * | 2009-06-18 | 2009-11-25 | 张�林 | Method for manufacturing reinforced seamless table tennis and manufacturing equipment 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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Country or region after: China Address after: 518000 workshop 208, No. 1, Longcheng Industrial Park, huanggekeng community, Longcheng street, Longgang District, Shenzhen City, Guangdong Province Applicant after: Shenzhen Bainuo Digital Technology Co.,Ltd. Address before: No. 6, Xinling Industrial Zone, Huanguanzhong Road, Guanlan Street, Longhua New District, Shenzhen City, Guangdong Province, 518110 Applicant before: Shenzhen Bainuo Education Technology Co.,Ltd. Country or region before: China |
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