CN109859775A - A kind of single layer special type DVD mirror surface and its application method and manufacturing method - Google Patents
A kind of single layer special type DVD mirror surface and its application method and manufacturing method Download PDFInfo
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- CN109859775A CN109859775A CN201910192543.0A CN201910192543A CN109859775A CN 109859775 A CN109859775 A CN 109859775A CN 201910192543 A CN201910192543 A CN 201910192543A CN 109859775 A CN109859775 A CN 109859775A
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- mirror surface
- dynamic model
- cover half
- guide ring
- seat
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Abstract
The present invention provides a kind of single layer special type DVD mirror surface and its application method and manufacturing method, more particularly to DVD disc production technical field, including dynamic model and cover half, it is connected between dynamic model and cover half by positioning guide column, dynamic model includes dynamic model guide ring and dynamic model panel, it is connected between one end face of dynamic model guide ring and an end face of dynamic model panel, mirror surface seat is provided in the other end of dynamic model guide ring, cover half includes cover half guide ring and cover half panel, it is connected between one end face of cover half guide ring and an end face of cover half panel, DLC mirror surface is provided in the other end of cover half guide ring, one end of positioning guide column is each passed through dynamic model guide ring and dynamic model panel, the other end of positioning guide column is each passed through cover half guide ring and cover half panel, mirror surface is provided on the top surface of mirror surface seat, mirror surface seat and mirror surface are disc-shaped structure, The bottom of mirror surface is additionally provided with sink.The present invention has many advantages, such as to simplify the production procedure of single layer special type DVD disk, has saved production raw material.
Description
Technical field
The present invention relates to DVD disc production technical fields, and in particular to a kind of single layer special type DVD mirror surface and its application method
And manufacturing method.
Background technique
Process is tedious, higher cost for common DVD disk production, and common DVD disk be by two with a thickness of
The disc of 0.6mm is bonded with glue.The quality of bonding influences the quality of DVD disk finished product very big.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of with the production procedure for simplifying single layer special type DVD disk,
The single layer special type DVD mirror surface for producing raw material and its application method and manufacturing method are saved.
In order to solve the above technical problem, the present invention provides a kind of single layer special type DVD mirror surface and its application methods, including dynamic
Mould and cover half are connected between dynamic model and cover half by positioning guide column, and dynamic model includes dynamic model guide ring and dynamic model panel, dynamic model guiding
It is connected between one end face of ring and an end face of dynamic model panel, mirror surface seat is provided in the other end of dynamic model guide ring, it is fixed
Mould includes cover half guide ring and cover half panel, is connected between an end face of cover half guide ring and an end face of cover half panel, fixed
DLC mirror surface is provided in the other end of mould guide ring, one end of positioning guide column is each passed through dynamic model guide ring and dynamic model panel,
The other end of positioning guide column is each passed through cover half guide ring and cover half panel, and mirror surface, mirror surface seat are provided on the top surface of mirror surface seat
It is disc-shaped structure with mirror surface, the bottom of mirror surface is additionally provided with sink, and sink is helicoidal structure, and the width of sink is 6
Millimeter, the depth of sink are 8 millimeters, and the top surface of mirror surface is additionally provided with recessed heavy platform, are additionally provided with stepped hole on mirror surface seat, on mirror surface
It is provided with cylinder bore, sink is located at the outside of cylinder bore, and recessed heavy platform, stepped hole and cylinder bore are in the same axial line
On, the diameter at the top of stepped hole is identical as the diameter of cylinder bore, and recessed heavy platform is rounding stage body shape, and the larger diameter end of recessed heavy platform
Diameter is 32 millimeters, and the height of recessed heavy platform is 0.55 millimeter, the folder between the bus of recessed heavy platform and the plane where larger diameter end
Angle is 30 degree, is additionally provided with cutter seat on dynamic model panel, cutter is provided on cutter seat, be additionally provided on dynamic model panel cover board with
Fixed block, and cutter seat, between cover board and fixed block, one end of cutter is arranged on cutter seat, and the other end of cutter passes through
Fixed block, and the other end of cutter is located in dynamic model guide ring, and heavy platform is additionally provided on cover board, cutter seat is located in heavy platform, cuts
Between knife and fixed block, it is also provided with lattice Lay sealing ring between cutter and dynamic model panel, is additionally provided with mother on cover half guide ring
Disk set, stamper set is with cover half guide ring on same axial line.
Preferably, the application method of the single layer special type DVD mirror surface, comprising the following steps:
S1: mold clamping, dynamic model and cover half engaging pass through positioning so that distance is 1.15 millimeters between dynamic model and cover half
Guide post will position between dynamic model guide ring and cover half guide ring；
S2: injection, screw rod rotate in injection to die cavity；
S3: compression forming, molding, clamp force are 50 tons；
S4: punching, by punching after the cooling of S3 products therefrom 1.5 seconds, the diameter in hole is 15 millimeters；
S5: dynamic model is opened in die sinking, so that distance is 150 millimeters between dynamic model and cover half；
S6: taking dish, is taken out the disk between dynamic model and cover half using manipulator；
S7: line is cooling after turning, and disk is transferred to cooling on flowing water turntable using manipulator；
S8: dyestuff, by disk close to the planar ends dyestuff at cover half end；
S9: rinsing drying, after rotation uniformly, needle tubing is directed at disk outer diameter 30mm distance, rotating compact disc is rinsed, and is rushed
Use UV lamp by disk rotary furnace drying after washing；
S10: printing is printed on disk dyestuff face；
S11: imprinting, imprinting content.
S12: being packaged, and is packaged one for 200.
Preferably, the single layer special type DVD mirror surface, including following procedure of processing:
S1-1: blanking, the outer diameter and height of dynamic model guide ring and cover half guide ring blanking are than single layer special type DVD mirror surface
Outer diameter and height are 2 to 3 millimeters big；
S1-2: lathe processes the outer diameter of dynamic model guide ring and cover half guide ring, so that dynamic model guide ring and cover half guide ring
Size it is 0.5 millimeter bigger than the finished product of dynamic model guide ring and cover half guide ring, inner hole is 0.5 millimeter small, height it is 0.5 millimeter big；
S1-3: milling machine processes lateral aperture and inclined hole on mirror surface seat；
S1-4:CNC processes the end face pin hole and sink of mirror surface；
S1-5: tapping processes the threaded hole of 5 M10 in mirror surface seat bottom；
S1-6: annealing, going the temperature of de-stress is 650 degree, and the time is 3 hours；
S1-7: sand-blasting machine removes sink oxide skin；
S1-8: plain grinding, light-exposed brazing surface；
S1-9: soldering after mirror surface is filled with fine material, carries out two sections of heatings, first stage heating 450 according to soldering processes route
To 800 degree, 950 to 1050 degree of second stage heating, two stages keep the temperature 30 minutes, come out of the stove tempering twice, temperature 420
Degree；
S1-10: measuring under plain grinding, and light-exposed both ends of the surface stay 0.2 millimeter of surplus；
S1-11: measuring under turner, and interior overall diameter stays 0.2 millimeter of surplus；
S1-12: inside and outside mill；
S1-13: smart car, the recessed heavy platform rank of chamfering, vehicle；
S1-14: step in polishing polishes the recessed heavy platform rank after S1-13 processing；
S1-15: polishing mirror surface；
S1-16: titanizing, by mirror surface entirety titanizing.
Preferably, it is connected between the mirror surface seat and mirror surface for brazing mode.
Preferably, the mirror surface is made of HPM38 material.
It preferably, is R2 transition between the bottom surface and side of the sink.
Advantages of the present invention:
(1) process for simplifying the production of single layer special type DVD disk, eliminates bonding process, reduces and cause because of bonding
Single layer special type DVD disk disqualification rate；
(2) the single layer special type DVD disk produced by this single layer special type DVD mirror surface, it is only necessary to which individual disk saves
Raw material greatly reduce production cost；
(3) upgrading can be carried out to common CD and VCD production line, so as to carry out this single layer special type DVD disk
Production.
Detailed description of the invention
Fig. 1 is a kind of mirror surface holder structure schematic diagram of single layer special type DVD mirror surface of the present invention；
Fig. 2 is a kind of recessed heavy platform structural schematic diagram of single layer special type DVD mirror surface of the present invention；
Fig. 3 is single layer special type DVD disc structure schematic diagram；
Fig. 4 is a kind of sink structure schematic diagram of single layer special type DVD mirror surface of the present invention:
Fig. 5 is a kind of single layer special type DVD mirror surface structure schematic diagram of the present invention:
In the figure, it is marked as 1, mirror surface seat；11, stepped hole；12, lateral aperture；13, inclined hole；2, mirror surface；21, cylinder bore；
22, end face pin hole；3, sink；4, recessed heavy platform；5, dynamic model；51, dynamic model guide ring；52, dynamic model panel；6, cover half；61, cover half is led
Xiang Huan；62, cover half panel；63, DLC mirror surface；64, stamper set；7, cutter seat；71, cutter；72, cover board；721, heavy platform；73, solid
Determine block；74, lattice Lay sealing ring；8, positioning guide column.
Specific embodiment
The preferred embodiment of the present invention is described with reference to the accompanying drawing.
Embodiment one
As shown in Figs. 1-5, a kind of single layer special type DVD mirror surface of the invention, including dynamic model 5 and cover half 6, dynamic model 5 and cover half 6
Between connected by positioning guide column 8, dynamic model 5 includes dynamic model guide ring 51 and dynamic model panel 52, an end face of dynamic model guide ring 51
It is connected between an end face of dynamic model panel 52, mirror surface seat 1 is provided in the other end of dynamic model guide ring 51, cover half 6 wraps
Cover half guide ring 61 and cover half panel 62 are included, is connected between an end face of cover half guide ring 61 and an end face of cover half panel 62
It connects, DLC mirror surface 63 is provided in the other end of cover half guide ring 61, one end of positioning guide column 8 is each passed through dynamic model guide ring
51 and dynamic model panel 52, the other end of positioning guide column 8 be each passed through cover half guide ring 61 and cover half panel 62, the top of mirror surface seat 1
Mirror surface 2 is provided on face, mirror surface seat 1 and mirror surface 2 are disc-shaped structure, and the bottom of mirror surface 2 is additionally provided with sink 3, and sink 3 is
Helicoidal structure, and the width of sink 3 is 6 millimeters, the depth of sink 3 is 8 millimeters, and the top surface of mirror surface 2 is additionally provided with recessed heavy platform
4, stepped hole 11 is additionally provided on mirror surface seat 1, cylinder bore 21 is provided on mirror surface 2, and sink 3 is located at the outer of cylinder bore 21
Portion, and the diameter and cylindrical body of recessed heavy platform 4, stepped hole 11 and cylinder bore 21 on the same axial line, at the top of stepped hole 11
The diameter in hole 21 is identical, and recessed heavy platform 4 is rounding stage body shape, and the larger diameter end diameter of recessed heavy platform 4 is 32 millimeters, recessed heavy platform 4
Height is 0.55 millimeter, and the angle between the bus of recessed heavy platform 4 and the plane where larger diameter end is 30 degree, on dynamic model panel 52
It is additionally provided with cutter seat 7, cutter 71 is provided on cutter seat 7, cover board 72 and fixed block 73 are additionally provided on dynamic model panel 52, and
Cutter seat 7 is between cover board 72 and fixed block 73, and one end of cutter 71 is arranged on cutter seat 7, and the other end of cutter 71 is worn
Fixed block 73 is crossed, and the other end of cutter 71 is located in dynamic model guide ring 51, heavy platform 721, cutter seat 7 are additionally provided on cover board 72
In heavy platform 721, between cutter 71 and fixed block 73, lattice Lay sealing ring is also provided between cutter 71 and dynamic model panel 52
74, stamper set 64 is additionally provided on cover half guide ring 61, stamper set 64 is with cover half guide ring 61 on same axial line.
Embodiment two
The application method of single layer special type DVD mirror surface, comprising the following steps: mold clamping, dynamic model 5 and cover half 6 engage, so that
Distance is 1.15 millimeters between dynamic model 5 and cover half 6, will be between dynamic model guide ring 51 and cover half guide ring 61 by positioning guide column 8
It is positioned；Injection, screw rod rotate in injection to die cavity；Compression forming, molding, clamp force are 50 tons；Punching will produce obtained by S3
Punching after object is 1.5 seconds cooling, the diameter in hole are 15 millimeters；Die sinking opens dynamic model 5, so that distance is between dynamic model 5 and cover half 6
150 millimeters；Dish is taken, is taken out the disk between dynamic model 5 and cover half 6 using manipulator；Line is cooling after turning, using manipulator by dish
Piece is transferred on flowing water turntable cooling；Dyestuff, by disk close to the planar ends dyestuff at 5 end of cover half；Drying is rinsed, rotation is uniform
Afterwards, needle tubing is directed at disk outer diameter 30mm distance, rotating compact disc is rinsed, and uses UV lamp by disk rotary furnace drying after flushing；
Printing, prints on disk dyestuff face；Imprinting, imprinting content；It is packaged, is packaged one for 200.
Embodiment three
Single layer special type DVD mirror surface, including following procedure of processing: blanking, 61 blanking of dynamic model guide ring 51 and cover half guide ring
Outer diameter and height it is 2 to 3 millimeters bigger than the outer diameter and height of single layer special type DVD mirror surface；Lathe processes 51 He of dynamic model guide ring
The outer diameter of cover half guide ring 61, so that the size of dynamic model guide ring 51 and cover half guide ring 61 is than dynamic model guide ring 51 and cover half
The finished product of guide ring 61 is 0.5 millimeter big, and inner hole is 0.5 millimeter small, and height is 0.5 millimeter big；Milling machine processes the side on mirror surface seat 1
Hole 12 and inclined hole 13；CNC processes the end face pin hole 22 and sink 3 of mirror surface 2；Tapping processes 5 M10 in 1 bottom of mirror surface seat
Threaded hole；Annealing, going the temperature of de-stress is 650 degree, and the time is 3 hours；Sand-blasting machine removes sink oxide skin；Plain grinding,
Light-exposed brazing surface；Soldering after mirror surface 2 is filled with fine material, carries out two sections of heatings, first stage heating 450 according to soldering processes route
To 800 degree, 950 to 1050 degree of second stage heating, two stages keep the temperature 30 minutes, come out of the stove tempering twice, temperature 420
Degree；It is measured under plain grinding, light-exposed both ends of the surface stay 0.2 millimeter of surplus；It is measured under turner, interior overall diameter stays 0.2 millimeter of surplus；It is inside and outside
Mill；Smart car, the recessed heavy platform rank of chamfering, vehicle；Step in polishing polishes the recessed heavy platform rank after S1-13 processing；Polish mirror surface；Titanizing,
By the whole titanizing of mirror surface 2, is connected between mirror surface seat 1 and mirror surface 2 for brazing mode, be provided with sink 3 and cooled down, week can be accelerated
Phase and by the adjustable parameter of temperature, mirror surface 2 is made of HPM38 material, mirror surface 2 can with titanizing, to increase wearability,
It is R2 transition between the bottom surface and side of sink 3.
The foregoing is merely the preferred embodiments of innovation and creation, are not intended to limit the invention creation, all in this hair
Made any modifications, equivalent replacements, and improvements etc., should be included in the invention within the spirit and principle of bright creation
Within protection scope.
Claims (6)
1. a kind of single layer special type DVD mirror surface, which is characterized in that including dynamic model (5) and cover half (6), dynamic model (5) and cover half (6) it
Between by positioning guide column (8) connect, dynamic model (5) includes dynamic model guide ring (51) and dynamic model panel (52), dynamic model guide ring (51)
An end face and an end face of dynamic model panel (52) between be connected, be provided with mirror surface in the other end of dynamic model guide ring (51)
Seat (1), cover half (6) include cover half guide ring (61) and cover half panel (62), the end face and cover half face of cover half guide ring (61)
It is connected between one end face of plate (62), DLC mirror surface (63), positioning guide column is provided in the other end of cover half guide ring (61)
(8) one end is each passed through dynamic model guide ring (51) and dynamic model panel (52), and the other end of positioning guide column (8) is each passed through cover half
Guide ring (61) and cover half panel (62) are provided with mirror surface (2) on the top surface of mirror surface seat (1), and mirror surface seat (1) and mirror surface (2) are equal
For disc-shaped structure, the bottom of mirror surface (2) is additionally provided with sink (3), and sink (3) is helicoidal structure, and the width of sink (3)
It is 6 millimeters, the depth of sink (3) is 8 millimeters, and the top surface of mirror surface (2) is additionally provided with recessed heavy platform (4), and mirror surface seat is also set up on (1)
Have stepped hole (11), be provided on mirror surface (2) cylinder bore (21), sink (3) is located at the outside of cylinder bore (21), and recessed heavy
Platform (4), stepped hole (11) and the diameter and cylinder bore of cylinder bore (21) on the same axial line, at the top of stepped hole (11)
(21) diameter is identical, and recessed heavy platform (4) is rounding stage body shape, and the larger diameter end diameter of recessed heavy platform (4) is 32 millimeters, recessed heavy platform
(4) height is 0.55 millimeter, and the angle between the bus of recessed heavy platform (4) and the plane where larger diameter end is 30 degree, dynamic model
It is additionally provided with cutter seat (7), is provided on cutter seat (7) cutter (71) on panel (52), dynamic model panel is additionally provided on (52)
Cover board (72) and fixed block (73), and cutter seat (7) is located between cover board (72) and fixed block (73), one end of cutter (71) is set
It sets on cutter seat (7), the other end of cutter (71) passes through fixed block (73), and the other end of cutter (71) is located at dynamic model guiding
It in ring (51), is additionally provided on cover board (72) heavy platform (721), cutter seat (7) is located in heavy platform (721), cutter (71) and fixation
Between block (73), lattice Lay sealing ring (74), cover half guide ring (61) are also provided between cutter (71) and dynamic model panel (52)
On be additionally provided with stamper set (64), stamper set (64) and cover half guide ring (61) are on same axial line.
2. a kind of application method of single layer special type DVD mirror surface according to claim 1, which is characterized in that including following step
It is rapid:
S1: mold clamping, dynamic model (5) and cover half (6) engaging, so that distance is 1.15 millimeters between dynamic model (5) and cover half (6),
It will be positioned between dynamic model guide ring (51) and cover half guide ring (61) by positioning guide column (8)；
S2: injection, screw rod rotate in injection to die cavity；
S3: compression forming, molding, clamp force are 50 tons；
S4: punching, by punching after the cooling of S3 products therefrom 1.5 seconds, the diameter in hole is 15 millimeters；
S5: die sinking is opened dynamic model (5), so that distance is 150 millimeters between dynamic model (5) and cover half (6)；
S6: taking dish, is taken out the disk between dynamic model (5) and cover half (6) using manipulator；
S7: line is cooling after turning, and disk is transferred to cooling on flowing water turntable using manipulator；
S8: dyestuff, the planar ends dyestuff that disk is held close to cover half (6)；
S9: rinsing drying, after rotation uniformly, needle tubing is directed at disk outer diameter 30mm distance, rotating compact disc is rinsed, after flushing
Using UV lamp by disk rotary furnace drying；
S10: printing is printed on disk dyestuff face；
S11: imprinting, imprinting content.
S12: being packaged, and is packaged one for 200.
3. a kind of manufacturing method of single layer special type DVD mirror surface according to claim 1, which is characterized in that add including following
Work step is rapid:
S1-1: blanking, the outer diameter and height of dynamic model guide ring (51) and cover half guide ring (61) blanking are than single layer special type DVD mirror
The outer diameter and height in face are 2 to 3 millimeters big；
S1-2: lathe, process dynamic model guide ring (51) and cover half guide ring (61) outer diameter so that dynamic model guide ring (51) and calmly
The size of mould guide ring (61) is 0.5 millimeter bigger than the finished product of dynamic model guide ring (51) and cover half guide ring (61), and inner hole is small by 0.5
Millimeter, height are 0.5 millimeter big；
S1-3: milling machine processes lateral aperture (12) and inclined hole (13) on mirror surface seat (1)；
S1-4:CNC processes the end face pin hole (22) and sink (3) of mirror surface (2)；
S1-5: tapping processes the threaded hole of 5 M10 in mirror surface seat (1) bottom；
S1-6: annealing, going the temperature of de-stress is 650 degree, and the time is 3 hours；
S1-7: sand-blasting machine removes sink oxide skin；
S1-8: plain grinding, light-exposed brazing surface；
S1-9: soldering after mirror surface (2) is filled with fine material, carries out two sections of heatings, first stage heating 450 according to soldering processes route
To 800 degree, 950 to 1050 degree of second stage heating, two stages keep the temperature 30 minutes, come out of the stove tempering twice, temperature 420
Degree；
S1-10: measuring under plain grinding, and light-exposed both ends of the surface stay 0.2 millimeter of surplus；
S1-11: measuring under turner, and interior overall diameter stays 0.2 millimeter of surplus；
S1-12: inside and outside mill；
S1-13: smart car, the recessed heavy platform rank of chamfering, vehicle；
S1-14: step in polishing polishes the recessed heavy platform rank after S1-13 processing；
S1-15: polishing mirror surface；
S1-16: titanizing, by mirror surface entirety titanizing.
4. a kind of single layer special type DVD mirror surface according to claim 1, which is characterized in that mirror surface seat (1) and mirror surface (2) it
Between for brazing mode connect.
5. a kind of single layer special type DVD mirror surface according to claim 1, which is characterized in that mirror surface (2) is HPM38 material system
At.
6. a kind of single layer special type DVD mirror surface according to claim 1, which is characterized in that the bottom surface of sink (3) and side it
Between be R2 transition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910192543.0A CN109859775B (en) | 2019-03-14 | 2019-03-14 | Single-layer special DVD mirror surface and using method and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910192543.0A CN109859775B (en) | 2019-03-14 | 2019-03-14 | Single-layer special DVD mirror surface and using method and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN109859775A true CN109859775A (en) | 2019-06-07 |
| CN109859775B CN109859775B (en) | 2022-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910192543.0A Active CN109859775B (en) | 2019-03-14 | 2019-03-14 | Single-layer special DVD mirror surface and using method and manufacturing method thereof |
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| CN1843743A (en) * | 2005-04-08 | 2006-10-11 | 株式会社名机制作所 | Optical disk substrate forming die and mirror surface plate of optical disk substrate forming die |
| US20060258548A1 (en) * | 2005-04-28 | 2006-11-16 | Takeshi Gouko | Lubricant composition and article, disk molding stamper, disk molding apparatus, disk forming method, method of forming lubrication coating |
| CN101295522A (en) * | 2007-04-23 | 2008-10-29 | 东莞宏威数码机械有限公司 | Production system for manufacturing single-face single-layer DVDR recordable optical disk |
| CN102672892A (en) * | 2012-05-23 | 2012-09-19 | 南京科晖印刷科技有限公司 | In-mold injection molding method and in-mold injection molding mold |
| CN202878592U (en) * | 2012-09-20 | 2013-04-17 | 广东省粤东磁电有限公司 | Device for producing mother-disc-free white substrate |
| CN103317626A (en) * | 2013-06-29 | 2013-09-25 | 开平市盈光机电科技有限公司 | Improved structure of cavity ring for manufacturing optical disk |
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2019
- 2019-03-14 CN CN201910192543.0A patent/CN109859775B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1843743A (en) * | 2005-04-08 | 2006-10-11 | 株式会社名机制作所 | Optical disk substrate forming die and mirror surface plate of optical disk substrate forming die |
| US20060258548A1 (en) * | 2005-04-28 | 2006-11-16 | Takeshi Gouko | Lubricant composition and article, disk molding stamper, disk molding apparatus, disk forming method, method of forming lubrication coating |
| CN101295522A (en) * | 2007-04-23 | 2008-10-29 | 东莞宏威数码机械有限公司 | Production system for manufacturing single-face single-layer DVDR recordable optical disk |
| CN102672892A (en) * | 2012-05-23 | 2012-09-19 | 南京科晖印刷科技有限公司 | In-mold injection molding method and in-mold injection molding mold |
| CN202878592U (en) * | 2012-09-20 | 2013-04-17 | 广东省粤东磁电有限公司 | Device for producing mother-disc-free white substrate |
| CN103317626A (en) * | 2013-06-29 | 2013-09-25 | 开平市盈光机电科技有限公司 | Improved structure of cavity ring for manufacturing optical disk |
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| CN109859775B (en) | 2022-01-18 |
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