CN101032856A

CN101032856A - Forming method of optical disk substrate and blue-ray optical disk

Info

Publication number: CN101032856A
Application number: CN 200610167723
Authority: CN
Inventors: 蛯名利幸
Original assignee: Meiki Seisakusho KK
Current assignee: Meiki Seisakusho KK
Priority date: 2006-03-06
Filing date: 2006-12-19
Publication date: 2007-09-12
Anticipated expiration: 2026-12-19
Also published as: CN101637961A; CN100519139C; TWI326082B; TW200735095A; JP2007237407A

Abstract

In a method for forming an optical disk substrate, in a cavity formed between a master mold for forming an information area, a movable mold provided with an outer blade for opening a center hole in the optical disk substrate, and a fixed mold provided with an inner blade fitted when the outer blade is advanced, a molten resin is injected and filled in the cavity, and the outer blade is advanced and fitted into an inner peripheral hole of the inner blade, so that a mounting portion where no burr protrudes from a horizontal area on the inner peripheral side is formed on the information area surface where a track pitch of 0.010 μm to 0.040 μm is formed. The optical disk substrate formed by the optical disk substrate forming method is provided with a protective layer and a carrying part for protecting the information area on at least one surface of the optical disk substrate, and the other surface of the optical disk substrate is subjected to surface treatment.

Description

The manufacturing process of optic disc base board and Blu-ray Disc

Technical field

The present invention relates to molding optical disc substrates method and Blu-ray Disc, in particular at Blu-ray Disc with substrate or be similar to Blu-ray Disc with the method that forms centre bore on the optic disc base board of substrate.

Background technology

The content that patent documentation 1 is put down in writing to patent documentation 3 belongs to the conventional method that forms centre bore on optic disc base board; Belong to shaping CD CD substrate about 1 of patent documentation, the inside is on the books begin to penetrate cutting (dice) member when filling, and between perforation (punch) member formed sluice gate G interval G1 be the formation example of 0.3mm; But the message district track pitch in the CD shaping is 1.6 μ m, even also low about 290 ℃ of the molten resin temperature when penetrate forming.

In addition, belong to shaping DVD CD substrate about 2 of patent documentations, this is to allow outer cutter give prominence to towards cavity to move forward under the state of 0.2～0.3mm advance apart from B (0.7mm) cut off the example of cast gate again; Optic disc base board thickness of slab in the DVD shaping is 0.6mm, and the standard track pitch in message district is 0.74 μ m; In addition, the DVD substrate is another optic disc base board of fitting in the message district of another optic disc base board, so an end in optic disc base board message district does not become mounting portion when reading.

Moreover, belonging at Blu-ray Disc about 3 of patent documentations and go up to form centre bore with substrate (Blu-Ray Disc, Blu-ray Disc are trade mark), the example that utilizes perforating press shaping centre bore has been put down in writing in the inside; But shown in patent documentation 3, except the injection molding engineering of shaping optic disc base board, use the centre bore punching engineering that perforating press carried out that forms centre bore in addition, can bring the burden on the cost; Moreover, as shown in Figure 4, the master mold of on fixed mould 52, being installed 53, also have by optical disc substrate forming mould 51 be shaped as shown in Figure 5 Blu-ray Disc with the method for substrate D 1.

Shaping Blu-ray Disc on the Blu-ray Disc D shown in Figure 5 is provided with protective layer with substrate D 1 message district D3 etc., and message district D3 etc. then forms reading face; When therefore reading Blu-ray Disc D is placed mounting table (spindle), allow the D4 of mounting portion of centre bore D2 side be same as message district D3 etc.; The message district D3 track pitch of Blu-ray Disc D (pothole (pit) row at interval) is 0.32 μ m, is reduced into half of DVD CD track pitch approximately; Need when therefore reading the correct mounting of Blu-ray Disc D in mounting table, to improve the dimensional accuracy of the Blu-ray Disc D mounting D4 of portion.

But aforementioned fixed mould shown in Figure 4 52 be provided with master mold 53 routine aspect, ejaculation is filled in the molten resin in the cavity 54, be by allowing the outer cutter 56 of flexible mould 55, advance with chimeric, to form the D4 of mounting portion of Blu-ray Disc D by fixed mould 52 ends towards the interior cutter 57 of fixed mould 52; But the both sides relation in aforementioned outer cutter 56 is embedded in during cutter 57 is to form so that the gap of not blocking is set; Therefore as shown in Figure 5, the Blu-ray Disc substrate D 1 of optical disc substrate forming mould 51 formed therebies of master mold 53 is installed on fixed mould 52, can be allowed the resin that residues in aforementioned gap form burr D5 and remain in the D4 of mounting portion, and then many defective products problems take place; Perhaps master mold 53 is arranged at the example of aforementioned fixation mould 52, then need be provided for removing the finished machined engineering of burr D5 separately in follow-up engineering.

Patent documentation 1: Japanese kokai publication hei 6-143364 communique (0020,0021, Fig. 1)

Patent documentation 2: TOHKEMY 2005-297371 communique (0013,0015, Fig. 1, Fig. 2)

Patent documentation 3: TOHKEMY 2005-125485 communique (0002,0038, Fig. 2, Fig. 6)

Summary of the invention

The objective of the invention is to, overcome the problems referred to above, be provided for solving Blu-ray Disc with substrate or similar molding optical disc substrates, when especially on the aforementioned lights disc board, opening centre bore, defective products such as formed burr in mounting portion, or be used to handle the molding optical disc substrates method of the subsequent treatment engineering problem of aforementioned burr; In addition, also provide Blu-ray Disc or the similar CD that solves foregoing problems.

The present invention's first routine molding optical disc substrates method, the master mold that forms the message district, and on optic disc base board, open the flexible mould that outer cutter set of centre bore and advance aforementioned outside during cutter in the cavity that forms between the chimeric fixed mould that interior cutter set, on the molding optical disc substrates method of shaping optic disc base board, with molten resin penetrate be filled in aforementioned cavity after, allow outer cutter advance with chimeric in the interior all holes of cutter inwardly, so that be same as on the message district face that forms 0.010 μ m to 0.040 μ m track pitch, forming the mounting portion of not giving prominence to burr from interior all side horizontal zones.

The present invention's second routine molding optical disc substrates method, at the master mold that forms the message district, reach the flexible mould that outer cutter set of on optic disc base board, opening centre bore, and when advancing outer cutter in the cavity that forms between the chimeric fixed mould that interior cutter set, on the molding optical disc substrates method of shaping optic disc base board, with molten resin penetrate be filled in cavity after, allow outer cutter advance with chimeric in the interior all holes of cutter inwardly, so that be same as on the message district face that forms 0.010 μ m to 0.040 μ m track pitch, form by outer cutter and outer cutter peripheral member, form the mounting portion on the curved inclined plane of section from interior all side horizontal zones towards centre bore.

According to the molding optical disc substrates method of the invention described above first or second example, mounting portion comprises from interior all side horizontal planes, forms the section curved surface shape inclined plane of 0.01mm to 0.1mm scope in optic disc base board thickness of slab direction.

According to each described molding optical disc substrates method of the present invention in above-mentioned three, begin with molten resin penetrate outer cutter front end face when being filled in cavity, and in be divided into 0.5mm to 1.0mm between the cutter flexible mould subtend face, with molten resin penetrate be filled in cavity after, allow outer cutter advance so that allow outer cutter advance in the interior all holes of cutter inwardly, to carry out the chimeric of 0.1mm to 0.5mm.

According to each described molding optical disc substrates method of the present invention in above-mentioned four, begin molten resin is penetrated when being filled in cavity, the cavity of fixed mould mirror board form face, and the master mold spaced surface of flexible mould be 1.15mm to 1.3mm, be spaced apart 1.05mm to 1.15mm before the demoulding, and allow the flexible mould position advance 0.5mm to 2.0mm betwixt with the compression molten resin.

According to each described molding optical disc substrates method of the present invention in above-mentioned five, molten resin is made of Merlon, and with 305 ℃ to 340 ℃ nozzle temperature, penetrates to be filled in the cavity.

According to the optic disc base board of each described molding optical disc substrates method formed thereby of the present invention in above-mentioned six, on an optic disc base board, be provided for protecting the protective layer and the mounting portion in message district at least, another side then carries out surface treatment.

The present invention compared with prior art has following remarkable advantages and beneficial effect:

Molding optical disc substrates method of the present invention is to use, form the master mold in message district, reach the flexible mould that outer cutter set of on optic disc base board, opening centre bore, and when advancing aforementioned outer cutter form the optical disc substrate forming mould of cavity between the chimeric fixed mould that interior cutter set, with molten resin penetrate be filled in cavity after, allow outer cutter advance with chimeric in the interior all holes of cutter inwardly, so that be same as on the message district face that forms 0.010 μ m to 0.040 μ m track pitch, form not from the mounting portion of the outstanding burr of interior all side horizontal zones, and the bad problem when being reduced Blu-ray Disc with molding optical disc substrates such as optic disc base boards; Or do not need to be provided for removing the finished machined engineering of burr in follow-up engineering.

Description of drawings

Fig. 1: the Blu-ray Disc of this enforcement kenel reaches the state diagram of penetrating before filling with the main position of substrate forming mould profile.

Fig. 2: the Blu-ray Disc of this enforcement kenel reaches to penetrate and fills the state diagram that the back cuts off cast gate with the main position profile of substrate forming mould.

Fig. 3: according to the Blu-ray Disc amplification profile of this enforcement kenel manufacturing.

Fig. 4: the Blu-ray Disc of doing according to conventional art is with the main position of substrate forming mould profile.

Fig. 5: according to the Blu-ray Disc amplification profile of conventional art manufacturing.

The specific embodiment

Below in conjunction with accompanying drawing specific embodiments of the invention are illustrated:

Consult Fig. 1 and Fig. 2, the Blu-ray Disc substrate forming mould 11 that is used for initial molding optical disc substrates method of the present invention is described; Fig. 1 represents the main position profile of the Blu-ray Disc of this enforcement kenel with substrate forming mould, in the state diagram of penetrating before filling; Fig. 2 represents the Blu-ray Disc of this enforcement kenel main position profile of substrate forming mould, reaches the state diagram after back cut-out cast gate is filled in ejaculation.

The Blu-ray Disc of this enforcement kenel is with substrate forming mould 11 (being designated hereinafter simply as " shaping dies 11 "), be used to be shaped the Blu-ray Disc of thickness of slab 1.1mm, diameter 120mm (all containing the shaping error) with optic disc base board D1 (ginseng Fig. 3 is designated hereinafter simply as " optic disc base board D1 "); Blu-ray Disc D (according to Blu-ray Disc Rewritable format) (login trade mark) is that 0.32 μ m (the containing the shaping error) track pitch with message district D3 is formed, and with 405nm short wavelength's blue laser light or hyacinthine laser light to read; And Blu-ray Disc D is characterised in that, is to allow the D4 of mounting portion that places mounting table be same as aforementioned message district D3 when reading; Moreover, the present invention does not limit the used optic disc base board D1 of Blu-ray Disc D, then form the message district track pitch of 0.010 μ m to 0.040 μ m, and can be used for the same line of this message district and mounting portion, and be similar to the Blu-ray Disc that forms precision prescribed in the mounting portion with optic disc base board on.

As shown in Figure 1, shaping dies 11 comprises flexible mould 12, and the fixed mould 13 of second mould of first mould; Between two

moulds

12 and 13 of matched moulds, then form the cavity 14 of variable volume, and be installed in the flexible mould 12 that is not shown on the graphic emission forming machine movable disk, be bonding on the active side mirror board 15 that is not shown in graphic movable inner panel, form the master mold 16 of the message district D3 that is set on aforementioned mirror board 15 surfaces, support interior all female die seat 17 of the master mold 16 that all holes are set in the aforementioned mirror board 15, the fixed sleeving 19 that all holes are set in interior all female die seat 17, the ejector sleeve pipe 20 that all holes are set in the aforementioned fixation sleeve pipe 19, the cylindric outer cutter 21 that all holes are set in the ejector sleeve pipe 20, be intercalated in the outstanding latch 22 in all holes in the outer cutter 21, and supporting master mold 16 peripheral parts be not shown in graphic periphery female die seat etc.

Each position of the flexible mould 12 of first mould below will be described in detail in detail; Mirror board 15 belongs to thin cylindrical member, and cavity 14 side surface 15a have the enforcement mirror finish; In addition, mirror board 15 inner faces (being bonding on the movable inner panel) then are formed for the cooling medium stream 15b of mobile cooling medium; Interior all female die seat 17 are cylindrical member, and cavity forms face 17a outer circumference end and is provided with the claw 18 that is used to push down master mold 16; The thickness of slab of master mold 16 is about 0.2mm～0.6mm, on the lip-deep optic disc base board D1 one side, then forms in order to form the trickle lug boss of signal on message district D3; And, then form clamp (clamping) district D6 in the message district D3 on all sides; Moreover if belong to the recording type optical disc time spent, aforementioned message district D3 also can form groove (groove) etc.

Fixed sleeving 19 has comprised cylindrical member, and the cavity of fixed sleeving 19 forms face 19a, and the cavity that is formed on all female die seat 17 in being same as forms on the height of face 17a; And during demoulding, can from the gap 23 of fixed sleeving 19 and interior all female die seat 17, spray air; The ejector sleeve pipe 20 of outer cutter peripheral member has comprised cylindrical member, and cavity forms face 20a side end, and is all rectangular in outer circumferential side and interior all sides of section shape; And the cavity of ejector sleeve pipe 20 formation face 20a, on location (beginning to penetrate the position when filling), then be the height that is same as fixed sleeving 19 cavitys formation face 19a; In addition, ejector sleeve pipe 20 can be advanced and retreat mobile by not being shown in graphic driving means; Moreover, in the time of around the mobile outer cutter 21 of advance and retreat, can also can use the outer cutter peripheral member that is fixed without ejector sleeve pipe 20.

The outer cutter 21 of this enforcement kenel belongs to, and is fixed in the cylindrical peripheral side member 21a all side member 21b are chimeric in cylindrical, to stride axial formation with the footpath member; And the aforementioned outer circumferential side member 21a of outer cutter 21 and interior all side member 21b highly are same as front end face 21e; Outer cutter 21 is by outer circumferential side member 21a and the formed reason of interior all side member 21b, forms cooling medium stream 21C between the two, therefore also member; The periphery of outer cutter 21 (outer circumferential side member 21a) is diameter 15.19mm; Outer cutter 21 can be by driving means, and all hole 27C haunt in aforementioned cavity 14 and in the interior cutter 27; Moreover, the driving means of outer cutter 21 or aforementioned ejector sleeve pipe 20, also usable oils cylinder pressure, cylinder, servo motor and ball screw mechanism etc.; Outer cutter 21 location (beginning to penetrate the position when filling) are the cavity formation face 20a from ejector sleeve pipe 20, then are adjusted into the position that allows outer cutter 21 front end face 21E give prominence to 0.4mm.

In addition, ejector sleeve pipe 20 inner peripheral surfaces and outer cutter 21 outer peripheral face 21D all carry out mirror finish; And the outer peripheral face 21d of the inner peripheral surface of the ejector sleeve pipe 20 that be arranged in parallel and outer cutter 21, its gap 24 is 0.010mm; Moreover 24 in crack is with 0.005mm to 0.015mm the best between the outer peripheral face 21d of the inner peripheral surface of aforementioned ejector sleeve pipe 20 and outer cutter 21; When both gap 24 was narrow, ejector sleeve pipe 20 or outer cutter 21 advanced or just can block when retreating; In addition, when both gap 24 was wide, molten resin can enter aforementioned gap 24 and form burr when penetrating; Moreover, the member numerical value of formation shaping dies 11 on this specification, the measured value when being all normal temperature.

In addition, in interior all holes of outer cutter 21 (interior all side member 21b), set outstanding latch in the mode of freely haunting; The bottom of the location of outstanding latch 22 (beginning to penetrate the position when filling) position cutter 21 outside being lower than; Moreover, be not to give prominence to latch 22.

On the other hand, being installed in the second mould fixed mould 13 that is not shown on the graphic emission forming machine fixed disk has comprised and is bonding on all holes are set in the fixation side mirror board 25 that is not indicated in graphic fixedly inner panel, the mirror board 25 insertion gate 26, inserts the interior cutter 27 that all holes are set in the gate 26, the sprue bush 28 that is set in all holes in cutter 27 in this etc.; When each position of fixed mould 13 deeply was described in detail in detail, mirror board 25 belonged to thin cylindrical member, and cavity forms face 25a the mirror finish of carrying out; Moreover aforementioned cavity forms face 25a when carrying out after the asperities processing easily demoulding, the formed horizontal plane D9 of another side can be made embossing (emboss) shape; In addition, mirror board 25 inner faces (being bonding on fixedly inner panel) then form the cooling medium stream 25b that is used for mobile cooling medium; And the cavity that the cavity that is provided with the aforementioned mirror board 25 of equal height forms face 25a and inserts gate 26 forms face 26a, can spray air from both gaps 29 during demoulding; Moreover the cavity that inserts gate 26 forms face 26a, also can form face 25a a little more than mirror board 25 cavitys.

Insert gate 26 and be provided with the annular recessed portion 30 that on ring-type, forms heap layer bar D8 as shown in Figure 3; Moreover, also annular recessed portion can be located at the fixed sleeving of flexible mould etc. about heap layer bar; And insertion gate 26 cavitys that equal height is set form face 26a and interior cutter 27 flexible mould subtend face 27a; In addition, interior cutter 27 aspects on the part of the interior all hole 27c in aforementioned flexible mould subtend face 27a, are provided with towards the ring-shaped protrusion 27b of flexible mould 12 side-prominent 50 μ m; Moreover, about aforementioned ring-shaped protrusion 27b aspect, in the another side (horizontal plane D9 side) of optic disc base board D centre bore D2, form on the countermeasure of burr, the height of outstanding 0.030mm to 0.080mm preferably is set; In addition, because the another side of optic disc base board D and the mounting when reading are irrelevant, therefore do not need ring-shaped protrusion 27b; In addition, insert the relation of gate and interior cutter, also can allow wherein an end towards the flexible mould projection.

All hole 27c have set sprue bush 28 in the interior cutter 27, and the mode that retreats 0.6mm from interior cutter 27 flexible mould subtend face 27a has set sprue bush 28 front end face 28a; In addition, between interior cutter 27 and the sprue bush 28, then form the cooling medium stream 31 that is used to cool off both.

The position relation of flexible mould 12 and fixed mould 13 below will be described, set fixed mould 13 mirror boards 25 in the mode that slightly is subtend towards the master mold 16 of flexible mould 12; In addition, all inwardly female die seat 17 have set insertion gate 26 with fixed sleeving 19 in the mode that slightly is subtend; Moreover, set interior cutter 27 towards ejector sleeve pipe 20 in the mode that slightly is subtend; In addition, cutter 21 has set sprue bush 28 in the mode that slightly is subtend outwardly, allows the mobile outer cutter 21 front end face 21e that can advance, interior all hole 27c of cutter 27 in being embedded in; Moreover the member that constitutes the cavity 14 of these shaping dies 11 all belongs to stainless steel and constitutes.

Next, the manufacturing process of optic disc base board D1 of the present invention will be described by Fig. 1 to Fig. 3; Fig. 3 belongs to the amplification profile by the Blu-ray Disc D of this enforcement kenel manufacturing.

Running is not shown in the clamping apparatus of graphic emission forming machine, moves and is installed in the flexible mould 12 of movable disk to carry out mold closing; Flexible mould 12 as shown in Figure 1, the fixed mould 13 that is embedded on the fixed disk to be installed, and form the cavity 14 of variable volume; Aforementioned master mold 16 in this enforcement kenel forms face 25a A at interval with the cavity of fixed mould 13 mirror boards 25, is to be similar to the mould 12 of stopping action on the 1.2mm position; Moreover this is at interval then with 1.15mm and even 1.30mm the best.

In addition, begin to penetrate when filling after in a single day flexible mould 12 stops again, the position of readiness of outer cutter 21 is positioned at, ejector sleeve pipe 20 cavitys of the outer cutter peripheral member shown in aforementioned form the position that face 20a proposes 0.4mm, and the interval B of outer cutter 21 front end face 21e and interior cutter 27 flexible mould subtend face 27a is adjusted into 0.8mm; Moreover, the position of readiness of aforementioned outer cutter 21, preferably the cavity from ejector sleeve pipe 20 forms outstanding 0.2mm of face 20a and even 0.7mm.In addition, the interval B of the front end face 21e of outstanding outer cutter 21 and interior cutter 27 flexible mould subtend face 27a is with 0.5mm and even 1.0mm the best; Moreover aforementioned interval B is during less than 0.5mm, on the mounting portion formation part 32 by section right angle represented on ejector sleeve pipe 20 and outer cutter 21 formed Fig. 2, just is difficult to the complete filling molten resin; In addition, the flow impedance that molten resin is penetrated when being filled in cavity 14 master molds 16 surfaces can become big; In addition, aforementioned interval B is during greater than 1.0mm, and molten resin can enter the gap 24 between ejector sleeve pipe 20 and the outer cutter 21 and form burr, and residues in the D4 of mounting portion easily; In addition, when the forward stroke of outer cutter 21 is long, just can increases the molten resin decrement in the cast gate (sprue), and be difficult to cut off cast gate; Moreover with the outer cutter in the CD forming board manufacturing process, outer cutter 21 position of readiness on this enforcement kenel then are positioned at the going-back position of flexible mould 12 compared to the CD of the conventional art patent documentation 1 of outstanding 0.9mm from the ejector sleeve pipe.

In addition, the temperature accent medium temperature that flows into the cooling medium stream 21c be used to cool off aforementioned outer cutter 21 is 85 ℃; Moreover aforementioned temperature is with 50 ℃ to 90 ℃ the bests; In addition, the temperature accent medium temperature that flows in the interior cutter 27 of fixed mould 13 and the cooling medium stream 31 between the sprue bush 28 is 75 ℃; Moreover aforementioned temperature is with 50 ℃ and even 90 ℃ of the bests.

Next, after allowing the spiral (screw) that is not shown in graphic ejecting device advance, by fixed mould 13 sprue bush 28 of the aforementioned ejecting device nozzle of reasonable contact and this nozzle, the ejaculation of the molten resin in the heating cylinder of ejecting device is filled in the aforementioned cavity 14; What this enforcement kenel was used is the polycarbonate thermoplastic transparent resin; And be to be filled in the aforementioned cavity 14 to be set to the summary equality of temperature molten resin of 320 ℃ nozzle temperature, to penetrate; Moreover nozzle temperature is then with 305 ℃ to 340 ℃ scope the bests; Moreover, with Blu-ray Disc D, after the molten resin temperature of penetrate filling is lower than aforementioned temperature, can the constriction track pitch etc. and can't carry out good duplicating; In addition, the issuing velocity of this moment is 100mm/sec, but with 75mm/sec to 200mm/sec the best; And finish after the ejaculation then that migration guarantees pressure, so cavity 14 is applied assurance pressure with 15MPa to 50MPa originally.

After penetrating the filling molten resin in the cavity 14, molten resin pressure can influence flexible mould 12, and allows flexible mould 12 retreat slightly; And, carry out aforementioned begin to penetrate filling in, the clamping apparatus that turns round again in the opportunity before and after slightly carry out so that allow flexible mould 12 advance towards fixed mould 13, the molten resin in the compaction cavum 14 is to carry out good duplicating.

To penetrating the molten resins of filling in the cavity 14, can in shaping dies 11 cavitys 14 of cooling, carry out cooling curing and shrink and reduce volume; So advance towards fixed mould 13 by flexible mould 12, to continue the aforementioned molten resin of compression by clamping apparatus; And the cavity of fixed mould 13 mirror boards 25 before the demoulding forms face 25a, and the spaced surface of flexible mould 12 master molds 16, forms 1.1mm than beginning to penetrate narrow 0.1mm before filling; Moreover, the cavity of fixed mould 13 mirror boards 25 before the demoulding form face 25a, and the master mold 16 spaced surface scopes of flexible mould 12 be 1.05mm and even 1.15mm, from beginning to penetrate till flexible mould 12 positions before filling play before the demoulding, preferably allow flexible mould 12 advance 0.5mm to 2.0mm to compress.

In addition, with the compression of parallel molten resin, and before finishing the molten resin cooling curing, allow the outer cutter 21 of flexible mould 12 by aforementioned flexible mould 12, interior all hole 27C of cuttves 27 advance cutting off cast gate in the fixed mould 13, and the centre bore D2 of opening optic disc base board D1; At this moment, then utilize when beginning to penetrate delay timer to begin to measure, outer cutter 21 began to advance after 0.2 second; Moreover, when advancing outer cutter 21, preferably fill execution between after 0.1 second and even 0.5 second from beginning to penetrate; Can be in ejecting device and still with aforementioned pressure apply assurance pressure status too early the time opportunity; Can because of molten resin sub-cooled curing be difficult to cut off cast gate when too slow opportunity.

The outer cutter thrust of this moment is 25kN, but with 16kN and even 35kN the best; And the chimeric amount C of all hole 27C in the interior cutter 27 of outer cutter 21 (internal cutter 27 flexible mould subtend face 27a, the size of chimeric outer cutter 21 front end face 21E) is 0.2mm; Moreover chimeric size is with 0.1mm and even 0.5mm the best.At this moment, can form burr D11 between all hole 27C in outer cutter 21 outer peripheral face 21D and the interior cutter 27, but interior cutter 27 is provided with ring-shaped protrusion 27b, so burr D11 only is formed between the outer peripheral face 21D of cyclic lug 27b inner peripheral surface and outer cutter 21, and is therefore outstanding from the another side of optic disc base board D1.

And, cooling curing molten resin fully when advancing outer cutter 21, therefore when penetrating filling, even molten resin only infiltrates the gap 24 of ejector sleeve pipe 20 and outer cutter 21 slightly, also can advancing because of outer cutter 21, and allow the molten resin of aforementioned infiltration be drawn toward fixed mould 13 sides, and in aforementioned gap 24, do not stay burr; So forms face 20a, reached the formed mounting of outer cutter 21 outer peripheral face 21D portion and form part 32 by ejector sleeve pipe 20 cavitys, form the D4 of mounting portion of Blu-ray Disc usefulness substrate D 1; Moreover flexible mould 12 is provided with on the shaping dies 11 of master mold 16, then forms annular recessed portion D7 by message district D3, clamp district D6, claw on one side; The cavity that reaches by ejector sleeve pipe 20 forms face 20a etc., all side horizontal plane D10 and the D4 of mounting portion in forming.

Have among Fig. 3 outer cutter 21 and ejector sleeve pipe 20 formed centre bore D2 and the D4 of mounting portion are described in detail in detail; The diameter of outer cutter 21 formed centre bore D2 is 15mm (permissible range is 14.97mm and even 15.08mm); All side horizontal plane D10 form the D4 of mounting portion towards section curved surface shape (the section convex arc surface) inclined plane of centre bore D2 in aforementioned; Detailed mounting portion D4 inclined plane is to form radius with the R face about 0.05mm; But this angle belongs near the anxious angle the centre bore D2, but partly is anxious angle near all side horizontal plane D10 in also can allowing; But from the aforementioned interior all side horizontal plane D10 of the D4 of mounting portion, going up formed scope in thickness of slab direction (interior all side horizontal plane D10 are meant right angle orientation) is 0.01mm and even 0.1mm; Moreover the mounting portion thickness of slab direction specification on the Blu-ray Disc is 0.1mm; And the D4 of mounting portion belongs to not the outstanding burr from interior all side horizontal plane D10 towards a side, therefore need not carry out subsequent treatment; Moreover these optic disc base boards D1 and Blu-ray Disc D numerical value all belong to cooling (annealing back) and make numerical value behind the product.

And, behind aforementioned outer cutter 21 cut-out cast gates, after in cavity 14, carrying out the cooling curing of molten resin once again, next then from the mirror board 25 of aforementioned fixed mould 13, and insert gap 29, the flexible mould 12 of gate 26 interior all female die seat 17, and the gap 23 of fixed sleeving 19 etc. begin to spray the demoulding air; And, allow aforementioned demoulding air influence mould cavity and form the while between face and the optic disc base board D1, allow flexible mould 12 retreat and move to carry out die sinking; The optic disc base board D1 that is shaped be not shown in graphic cast gate aspect, then mobile simultaneously flexible mould 12 during die sinking, and finish on the die sinking position, by not being shown in the taking-up robot of graphic knockout machine, in the time of the D9 of adsorbed water plane, utilization is advanced ejector sleeve pipe 20 with demoulding from flexible mould 12 fully, also separates cast gate by outstanding latch 22 fully from optic disc base board D1 simultaneously.

The optic disc base board D1 of this enforcement kenel formed thereby constitutes and Blu-ray Disc D shown in Figure 3; In other words, optic disc base board D1 thickness is 1.1mm, diameter 120mm, and centre bore D2 diameter is 15mm (all contains and allow the shaping error range); And, on the aforementioned lights disc board D1 one side (being positioned at the face of below when reading), then rise on the 23mm part at diameter 22mm, form by interior all female die seat 17 claws 18 formed annular recessed portion D7, its periphery then forms message district D3 and clamp district D6 by master mold 16; In addition, in aforementioned annular recessed portion D7 on all side diameter 15mm～22mm position, be 1.05mm to 1.15mm in abutting connection with the thickness of interior all side horizontal plane D10 of centre bore; And, between centre bore D2, form the D4 of mounting portion in abutting connection with interior all side horizontal plane D10; In addition, on the another side (being positioned at the face of top when reading) of aforementioned lights disc board D1 one side, then form flat horizontal face D9 slightly being on the part of subtend with message district D3; Slightly be with clamp district D6 and then form heap floor bar D8 on the part of subtend.

Next, by take out with the optic disc base board D1 that robot took out, be piled up in be not shown in graphic cooling with bunker (stocker) to cool off; Cooling has set plumb post with bunker central authorities; Optic disc base board D1 inserts logical this pillar with centre bore D2, allows the message district D3 of bottom surface be horizontal mounting; At this moment, optic disc base board D1 is provided with a heap layer bar D8, can allow horizontal plane D9 and the message district D3 of the optic disc base board D, the D that coincide up and down, coincides in discontiguous mode.

After finishing the cooling (containing the annealing engineering) of optic disc base board D1, next transport optic disc base board D1 to the aluminium-vapour deposition device, so that on message district D3, form aluminium-vapour deposition floor D12; Moreover also available other method is to handle message district D3; Form the optic disc base board D1 of aluminium-vapour deposition layer D12, be provided with and be used to protect the message district D3 protective layer D13 of (containing aluminium-vapour deposition floor D12); The thickness of slab of protective layer D13 on this enforcement kenel is that 0.1mm, diameter (external diameter) are same as optic disc base board D1, and allows the diameter (internal diameter) of central opening portion, greater than the mode of optic disc base board D1 annular recessed portion D7 outer circumference end, utilizes adhesive agent applying resin plate; When forming protective layer D13, except aforementioned, also can on message district D3, be coated with aqueous resin, and utilize photo-hardening or infrared radiation method harden aforementioned aqueous resin, formation protective layer D13 with rotation optic disc base board D1; In addition, the thickness of protective layer D13 is standard with 0.1mm, but also can imagine the scope of 0.085mm to 0.125mm.

And on the optic disc base board D1 horizontal plane D9 that forms protective layer D13, implement printing; This enforcement kenel is on the outer peripheral portion horizontal plane that optic disc base board D1 heap layer bar D8 rises, and forms the surface treatments such as printing of printed layers D14; But when heap floor bar is positioned at the face with message district, also another side can be considered as horizontal plane to print; Going through the Blu-ray Disc D of aforementioned engineering manufacturing, is with short wavelength's (405nm) blue laser light or hyacinthine laser light, reads a protective layer D13; Moreover the Blu-ray Disc D of this enforcement kenel is to circulate with direct packaged products, though only Blu-ray Disc D is arranged at reading device to read, when the product of receiver has been put in circulation, does not then get rid of the reading device that is arranged at each receiver.

In addition, though the present invention's particularize not is not confined to above-mentioned and implements kenel, wherein also contain and be familiar with this operator and follow the change that main contents of the present invention are done; In addition, the resin kind of use is not confined to aforementioned Merlon, can be for having other resin of remarkable optical characteristics yet; Moreover the message district also can form without the master mold of optical disc substrate forming mould, also can utilize the set master mold of follow-up engineering, utilizes light-hardening resin to duplicate and to form the message district.Therefore, although this specification has been described in detail the present invention with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the present invention; And all do not break away from the technical scheme and the improvement thereof of the spirit and scope of invention, and it all should be encompassed in the middle of the claim scope of the present invention.

Claims

1. molding optical disc substrates method, it is characterized in that: the master mold that forms the message district, and on optic disc base board, open the flexible mould that outer cutter set of centre bore and advance outside during cutter chimeric between the fixed mould that sets of cutter in the formed cavity, on the molding optical disc substrates method of shaping optic disc base board, with molten resin penetrate be filled in aforementioned cavity after, allow outer cutter advance with chimeric in the interior all holes of cutter inwardly, so that be same as on the message district face that forms 0.010 μ m to 0.040 μ m track pitch, forming the mounting portion of not giving prominence to burr from interior all side horizontal zones.The optic disc base board of formed thereby is characterized in that: be provided for protecting the protective layer and the mounting portion in message district at least on an optic disc base board, another side then carries out surface treatment.

2. molding optical disc substrates method, it is characterized in that: at the master mold that forms the message district, reach the flexible mould that outer cutter set of on optic disc base board, opening centre bore, and when advancing outer cutter chimeric between the fixed mould that sets of cutter in the formed cavity, on the molding optical disc substrates method of shaping optic disc base board, with molten resin penetrate be filled in aforementioned cavity after, allow outer cutter advance with chimeric in interior all holes of cutter inwardly, so that be same as on the message district face that forms 0.010 μ m to 0.040 μ m track pitch, form by outer cutter and outer cutter peripheral member, form the mounting portion that section is curved inclined plane from interior all side horizontal zones towards centre bore.

3. molding optical disc substrates method according to claim 1 and 2 is characterized in that: mounting portion comprises from interior all side horizontal planes, and the section that forms 0.01mm and even 0.1mm scope in optic disc base board thickness of slab direction is curved inclined plane.

4. according to each described molding optical disc substrates method of claim 1 to 3, it is characterized in that: molten resin begin to penetrate outer cutter front end face when being filled in cavity, and in be divided into 0.5mm to 1.0mm between the flexible mould subtend face of cutter, with molten resin penetrate be filled in cavity after, allow aforementioned outer cutter advance in interior all holes of cutter inwardly, to carry out the chimeric of 0.1mm to 0.5mm.

5. according to each described molding optical disc substrates method of claim 1 to 4, it is characterized in that: when the molten resin ejaculation is filled in cavity, the cavity of the mirror board of fixed mould form face, and the master mold spaced surface of flexible mould be 1.15mm to 1.3mm, the aforementioned 1.05mm to 1.15mm that is spaced apart before the demoulding, and allow the flexible mould position advance 0.5mm to 2.0mm betwixt with the compression molten resin.

6. according to each described molding optical disc substrates method of claim 1 to 5, it is characterized in that: aforementioned molten resin is made of Merlon, and with 305 ℃ to 340 ℃ nozzle temperature, penetrates to be filled in the aforementioned cavity.

7. optic disc base board according to each described molding optical disc substrates method formed thereby of claim 1 to 6, it is characterized in that: be provided for protecting the protective layer and the mounting portion in message district at least on an optic disc base board, another side then carries out surface treatment.