JP3065401B2 - Optical disc manufacturing method - Google Patents

Optical disc manufacturing method

Info

Publication number
JP3065401B2
JP3065401B2 JP3280510A JP28051091A JP3065401B2 JP 3065401 B2 JP3065401 B2 JP 3065401B2 JP 3280510 A JP3280510 A JP 3280510A JP 28051091 A JP28051091 A JP 28051091A JP 3065401 B2 JP3065401 B2 JP 3065401B2
Authority
JP
Japan
Prior art keywords
adhesive
center hub
resin substrate
hole
ultraviolet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP3280510A
Other languages
Japanese (ja)
Other versions
JPH0594643A (en
Inventor
豪 京田
俊幸 柴田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Corp
Original Assignee
Kyocera Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kyocera Corp filed Critical Kyocera Corp
Priority to JP3280510A priority Critical patent/JP3065401B2/en
Publication of JPH0594643A publication Critical patent/JPH0594643A/en
Application granted granted Critical
Publication of JP3065401B2 publication Critical patent/JP3065401B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/74—Joining plastics material to non-plastics material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B29C65/1406—Ultraviolet [UV] radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
    • B29C65/4845—Radiation curing adhesives, e.g. UV light curing adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/52—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive
    • B29C65/54—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive between pre-assembled parts
    • B29C65/542—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive between pre-assembled parts by injection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2422—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical
    • B29C66/24221—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical being circular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
    • B29C66/474—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially non-flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/731—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the intensive physical properties of the material of the parts to be joined
    • B29C66/7311—Thermal properties
    • B29C66/73111—Thermal expansion coefficient
    • B29C66/73112—Thermal expansion coefficient of different thermal expansion coefficient, i.e. the thermal expansion coefficient of one of the parts to be joined being different from the thermal expansion coefficient of the other part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1435—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. transmission welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2017/00—Carriers for sound or information
    • B29L2017/001—Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records
    • B29L2017/003—Records or discs
    • B29L2017/005—CD''s, DVD''s
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/737—Articles provided with holes, e.g. grids, sieves

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Manufacturing Optical Record Carriers (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】この発明は光ディスク、すなわ
ち、映像や音声などの情報を記録した再生専用のディス
クや磁性薄膜を光記録層として用いたキュリー点書き込
み方式のディスクなどの光ディスクにおけるセンターハ
ブの固定方法の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a center hub for an optical disk such as a read-only disk on which information such as video and audio are recorded and a Curie point writing type disk using a magnetic thin film as an optical recording layer. It relates to improvement of the fixing method.

【０００２】[0002]

【従来の技術】光ディスクを駆動装置に装填する方式と
してはマグネットクランプ方式が広く用いられている。
これは光ディスクの中心部にセンターハブを設け、この
センターハブを駆動装置側に設けられた永久磁石で吸引
して保持するものであり、センターハブとしては磁性材
料である金属板の一部を樹脂に埋め込んで一体成形した
複合型のものが一般的である。しかしながら、金属板を
埋め込みに適した形状にあらかじめ加工し、これを樹脂
と共に一体成形するために工程が複雑で製造コストが高
くなり、また製品の信頼性に不十分な点があるなどの問
題点があった。2. Description of the Related Art As a method of loading an optical disk into a driving device, a magnet clamp method is widely used.
In this method, a center hub is provided at the center of the optical disk, and the center hub is attracted and held by a permanent magnet provided on the drive device side. A part of a metal plate made of a magnetic material is used as the center hub. In general, a composite type which is embedded and integrally molded. However, since the metal plate is pre-processed into a shape suitable for embedding, and this is integrally molded with the resin, the process is complicated, the manufacturing cost is high, and the reliability of the product is insufficient. was there.

【０００３】[0003]

【発明が解決しようとする課題】そこで、金属のみで製
作されたいわゆるメタルハブを樹脂基板に接着するよう
にしてこれらの問題点を解決することが試みられてい
る。この接着には一般に樹脂接着剤が用いられるが、ポ
リカーボネート等の樹脂と金属の熱膨張係数の差が大き
いために接着強度が低下しやすく、また接着剤として紫
外線硬化型接着剤を用いた場合には、接着剤に紫外線を
直接照射できず基板の樹脂材料を通して照射することに
なるため、基板が透明であっても硬化が不十分となって
実用性のある接着強度を得ることが困難であった。この
発明はこのような問題点に着目し、樹脂基板に金属製の
センターハブを強固に接着することを課題としてなされ
たものである。Therefore, an attempt has been made to solve these problems by bonding a so-called metal hub made of metal only to a resin substrate. Generally, a resin adhesive is used for this bonding, but the adhesive strength tends to decrease due to a large difference in thermal expansion coefficient between the resin such as polycarbonate and the metal, and when an ultraviolet curable adhesive is used as the adhesive. However, since the adhesive cannot be directly irradiated with ultraviolet rays and is irradiated through the resin material of the substrate, the curing is insufficient even if the substrate is transparent, and it is difficult to obtain practical adhesive strength. Was. The present invention has been made in view of such a problem and has an object to firmly adhere a metal center hub to a resin substrate.

【０００４】[0004]

【課題を解決するための手段】上述の課題を解決するた
めに、この発明では、樹脂基板の中央部に金属製のセン
ターハブを接着した構造の光ディスクの製造に際して、
上記センターハブに樹脂基板の一方の面に当接する鍔状
部を設けてこの鍔状部に貫通穴を設け、この貫通穴内に
紫外線硬化型接着剤を一部が貫通穴の上部に若干はみ出
して抜け止め用の頭部を形成する状態で注入充填した
後、紫外線硬化型接着剤に紫外線を照射してこの接着剤
を硬化させることによって樹脂基板にセンターハブを接
着するようにしている。According to the present invention, there is provided an optical disk having a structure in which a metal center hub is bonded to a central portion of a resin substrate.
The center hub is provided with a flange portion abutting on one surface of the resin substrate, a through hole is provided in the flange portion, and a part of the ultraviolet curable adhesive partially protrudes into the upper portion of the through hole in the through hole. After injecting and filling in a state in which a head for retaining is formed, the center hub is adhered to the resin substrate by irradiating the ultraviolet curable adhesive with ultraviolet rays to cure the adhesive.

【０００５】[0005]

【作用】貫通穴に注入された紫外線硬化型接着剤に紫外
線を直接照射できるので、接着剤が十分に硬化すると共
に樹脂基板に強固に接着する。また接着剤は貫通穴の部
分でセンターハブにも接着すると共に、貫通穴の上部に
若干はみ出た部分が抜け止め用の頭部となってセンター
ハブが保持されるので、樹脂基板とセンターハブの面同
士を接着剤で接着する場合のように熱膨張係数の差の影
響を受けず、センターハブは確実に樹脂基板に固定され
る。The ultraviolet curing adhesive injected into the through-hole can be directly irradiated with ultraviolet rays, so that the adhesive is sufficiently cured and firmly adheres to the resin substrate. In addition, the adhesive adheres to the center hub at the through hole, and the part that protrudes slightly above the through hole serves as a head for retaining the center hub. The center hub is securely fixed to the resin substrate without being affected by the difference in thermal expansion coefficient as in the case where the surfaces are bonded with an adhesive.

【０００６】[0006]

【実施例】次に、図示の実施例について説明する。図に
おいて、１は樹脂基板２の中央部にセンターハブ３を備
えた光ディスクであり、樹脂基板２の一方の面には少な
くとも光記録層が形成されている。センターハブ３は金
属のみからなるものであって、ＳＵＳ４３０等の磁性材
料板をプレス成形して構成されており、図２に示すよう
に浅く絞った形状の円板部３ａの周縁に鍔状部３ｂが連
続形成され、この鍔状部３ｂに固定用の貫通穴４を設け
てある。センターハブ３は図２の(b)のように円板部３
ａを樹脂基板２の中央穴２ａに挿入し、貫通穴４に紫外
線硬化型接着剤５を注入充填させてこれを硬化させるこ
とによって樹脂基板２に固定される。Next, the illustrated embodiment will be described. In the figure, reference numeral 1 denotes an optical disk having a center hub 3 at the center of a resin substrate 2, and at least an optical recording layer is formed on one surface of the resin substrate 2. The center hub 3 is made of metal only, and is formed by press-forming a magnetic material plate such as SUS430. As shown in FIG. 3b are formed continuously, and a through hole 4 for fixing is provided in the flange 3b. The center hub 3 is a disc 3 as shown in FIG.
a is inserted into the center hole 2a of the resin substrate 2, the ultraviolet curable adhesive 5 is injected and filled into the through hole 4, and is cured to be fixed to the resin substrate 2.

【０００７】貫通穴４は例えば図２の(a)に示すように
円形の丸穴、あるいは図４に示すように円弧状の長穴を
一定間隔で複数個設けられており、貫通穴４の半径方向
の開口寸法Ａ(図３参照)は鍔状部３ｂの強度や大きさに
もよるが一般に０.８〜１.２mm程度とされる。また貫通
穴４から接着剤５がはみ出て硬化することによって形成
される頭部５ａの高さＢ(同じく図３参照)は、光ディス
クカートリッジの内寸にもよるが一般に０.２mm程度が
望ましい。なお、貫通穴４の形状と配置及びその個数は
図示の例以外でも任意に設定できるが、鍔状部３ｂに均
一に分布させることが望ましく、また貫通穴４の総面積
が大きいほど全体の接着強度を高めることができる。The through hole 4 is provided with, for example, a circular round hole as shown in FIG. 2A or a plurality of arc-shaped long holes at regular intervals as shown in FIG. The opening dimension A (see FIG. 3) in the radial direction depends on the strength and size of the flange 3b, but is generally about 0.8 to 1.2 mm. The height B (see also FIG. 3) of the head 5a formed by the adhesive 5 protruding from the through-hole 4 and being hardened depends on the inner size of the optical disk cartridge, but is generally preferably about 0.2 mm. The shape, arrangement and number of the through holes 4 can be arbitrarily set other than the example shown in the figure. However, it is desirable that the through holes 4 are uniformly distributed in the flange 3b. Strength can be increased.

【０００８】以上は実施例の構造を述べたものである
が、次にこの実施例と、メタルハブと樹脂基板を面同士
で接着した比較例の接着強度の比較試験について説明す
る。実施例１及び２は、それぞれ図２及び図４に示すセ
ンターハブ３を貫通穴４に紫外線硬化型接着剤５を注入
充填してこれを硬化させて樹脂基板２に固定したもので
ある。また、比較例は図５に示すように円板部３ａ´の
周縁に鍔状部３ｂ´を形成したセンターハブ３´を樹脂
基板２と鍔状部３ｂ´の間に紫外線硬化型接着剤５を塗
布して硬化させた構造のものである。The above is a description of the structure of the embodiment. Next, a description will be given of a comparative test of the bonding strength of this embodiment and a comparative example in which a metal hub and a resin substrate are bonded face to face. In Examples 1 and 2, the center hub 3 shown in FIGS. 2 and 4 was fixed to the resin substrate 2 by injecting and filling an ultraviolet curing adhesive 5 into the through hole 4 and curing the same. In the comparative example, as shown in FIG. 5, a center hub 3 'having a flange 3b' formed on the periphery of a disk 3a 'is provided with an ultraviolet-curing adhesive 5 between the resin substrate 2 and the flange 3b'. Is applied and cured.

【０００９】使用した樹脂基板２としては、次のように
して光記録層を形成したものを使用した。すなわち、ポ
リカーボネート製の直径８６mmの基板をマグネトロンス
パッタリング装置にセットし、基板上に非晶質イットリ
ウムサイアロン層を１１００Åの厚みで形成し、続けて
非晶質ＧｄＤｙＦｅ垂直磁化膜を２００Åの厚みで形成
し、更に上記と同じ非晶質イットリウムサイアロン層を
３００Åの厚みで形成する。そしてその上に、アルミニ
ウム金属層を８００Åの厚みで形成した後、スピンコー
ティング装置により紫外線硬化型保護樹脂(大日本イン
キ化学工業(株)製 ＳＤ３０１)を厚さ１０μmで塗布
し、これを硬化させて光記録層を形成している。The resin substrate 2 used had an optical recording layer formed as follows. That is, a substrate made of polycarbonate having a diameter of 86 mm was set in a magnetron sputtering apparatus, an amorphous yttrium sialon layer was formed on the substrate with a thickness of 1100 mm, and an amorphous GdDyFe perpendicular magnetization film was formed with a thickness of 200 mm. Then, the same amorphous yttrium sialon layer as described above is formed with a thickness of 300 °. Then, an aluminum metal layer having a thickness of 800 mm is formed thereon, and then an ultraviolet-curable protective resin (SD301, manufactured by Dainippon Ink and Chemicals, Inc.) is applied to a thickness of 10 μm by a spin coating apparatus, and this is cured. To form an optical recording layer.

【００１０】この樹脂基板２に、前述のような金属製の
センターハブ３または３´を紫外線硬化型接着剤(スリ
ーボンド(株)製 ＴＢ３１０１)を用いて接着した。こ
こで、実施例１，２では貫通穴４に注入充填した紫外線
硬化型接着剤５に鍔状部３ｂの側(図２(b)の下側)から
紫外線を照射して接着剤を硬化させ、比較例では樹脂基
板２の側(図５の上側)から紫外線を照射して接着剤を硬
化させた。こうして形成した実施例１，２及び比較例に
対して８０℃，９０％ＲＨの条件下での高温高湿環境試
験を１０００時間実施し、その前後でのセンターハブの
接着強度を測定した。接着強度はプッシュ・プルゲージ
を用いてセンターハブに対して垂直に引っ張り力を加
え、ハブが樹脂基板より剥がれた時の引っ張り力で評価
しており、その結果を表１に示す。The above-mentioned metal center hub 3 or 3 'was bonded to the resin substrate 2 using an ultraviolet-curable adhesive (TB3101 manufactured by Three Bond Co., Ltd.). Here, in Examples 1 and 2, the ultraviolet curing adhesive 5 injected and filled in the through hole 4 is irradiated with ultraviolet rays from the side of the flange 3b (the lower side of FIG. 2B) to cure the adhesive. In the comparative example, ultraviolet light was irradiated from the side of the resin substrate 2 (upper side in FIG. 5) to cure the adhesive. A high-temperature and high-humidity environment test under the conditions of 80 ° C. and 90% RH was performed on the thus formed Examples 1 and 2 and Comparative Example for 1000 hours, and the adhesive strength of the center hub before and after the test was measured. The adhesive strength was evaluated by applying a pulling force perpendicular to the center hub using a push-pull gauge and evaluating the pulling force when the hub was peeled from the resin substrate. The results are shown in Table 1.

【００１１】[0011]

【 表 １ 】 この表に示すように、実施例１及び２では初期及び高温
高湿試験後のいずれにおいても１０kgf以上の接着強度
を示したのに対して、比較例では初期でも８kgfで十分
な値が得られず、高温高湿試験後には更に低い値に低下
していることがわかる。[Table 1] As shown in this table, Examples 1 and 2 exhibited an adhesive strength of 10 kgf or more both in the initial stage and after the high-temperature and high-humidity test, whereas in the comparative example, a sufficient value was obtained with 8 kgf even in the initial stage. It can be seen that after the high-temperature and high-humidity test, the value decreased to a lower value.

【００１２】[0012]

【発明の効果】上述の実施例から明らかなように、この
発明は、金属製のセンターハブの鍔状部に設けた固定用
の貫通穴に紫外線硬化型接着剤を一部が貫通穴の上部に
若干はみ出る状態で注入充填させ、紫外線を照射してこ
の接着剤を硬化させることにより樹脂基板にセンターハ
ブを接着するようにしたものである。従って、樹脂基板
とセンターハブの面同士を接着剤で接着する場合とは異
なって紫外線硬化型接着剤に紫外線を直接照射できるの
で、接着剤を十分に硬化させると共に樹脂基板に強固に
接着させることができ、また樹脂と金属の熱膨張係数の
差に起因する接着強度の低下もなく、更に貫通穴の上部
に形成される接着剤の頭部が抜け止めとなってセンター
ハブが保持されるので、センターハブを確実に樹脂基板
に固定することが可能となる。As is apparent from the above-described embodiment, the present invention is characterized in that an ultraviolet-curing adhesive is partially applied to the fixing through-hole provided in the flange portion of the center hub made of metal, and a part of the through-hole is located above the through-hole. The center hub is adhered to the resin substrate by hardening the adhesive by irradiating it with ultraviolet rays so that the center hub slightly protrudes. Therefore, unlike the case where the surfaces of the resin substrate and the center hub are bonded to each other with an adhesive, ultraviolet rays can be directly applied to the ultraviolet-curable adhesive, so that the adhesive is sufficiently cured and firmly adhered to the resin substrate. Also, there is no decrease in the adhesive strength due to the difference in the coefficient of thermal expansion between the resin and the metal, and since the head of the adhesive formed on the upper part of the through hole is prevented from coming off, the center hub is held. Thus, the center hub can be securely fixed to the resin substrate.

【００１３】また樹脂基板とセンターハブを面同士で接
着する場合には、基板の樹脂材料とセンターハブの金属
材料の両方に対して良好な接着性を有する接着剤が必要
となるのであるが、この発明では金属に対する接着性は
それほど要求されないので接着剤の選択が容易になると
いう利点もあり、更に一般に多く用いられている紫外線
硬化型接着剤を用いるハブ取り付け装置をそのまま利用
することが可能で、新規な設備を必要としない利点もあ
る。When the resin substrate and the center hub are bonded face to face, an adhesive having good adhesion to both the resin material of the board and the metal material of the center hub is required. According to the present invention, there is an advantage that the adhesive can be easily selected because the adhesiveness to the metal is not so required. Further, a hub mounting device using an ultraviolet curable adhesive which is widely used can be used as it is. There is also an advantage that no new equipment is required.

【図面の簡単な説明】[Brief description of the drawings]

【図１】この発明に係る光ディスクの斜視図である。FIG. 1 is a perspective view of an optical disc according to the present invention.

【図２】この発明の一実施例におけるセンターハブの平
面図と光ディスクの断面図である。FIG. 2 is a plan view of a center hub and a cross-sectional view of an optical disc in one embodiment of the present invention.

【図３】同実施例における要部の拡大断面図である。FIG. 3 is an enlarged sectional view of a main part in the embodiment.

【図４】他の実施例におけるセンターハブの平面図であ
る。FIG. 4 is a plan view of a center hub in another embodiment.

【図５】比較例のセンターハブの平面図と光ディスクの
断面図である。FIG. 5 is a plan view of a center hub and a cross-sectional view of an optical disc of a comparative example.

【符号の説明】[Explanation of symbols]

１ 光ディスク ２ 樹脂基板 ３ センターハブ ３ｂ 鍔状部 ４ 貫通穴 ５ 紫外線硬化型接着剤 ５ａ 頭部 DESCRIPTION OF SYMBOLS 1 Optical disk 2 Resin substrate 3 Center hub 3b Flange part 4 Through-hole 5 Ultraviolet curing adhesive 5a Head

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G11B 7/26 G11B 11/105 546 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) G11B 7/26 G11B 11/105 546

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 樹脂基板上に少なくとも光記録層を備
え、該基板の中央部に金属製のセンターハブを接着して
なる光ディスクの製造方法であって、上記センターハブ
に樹脂基板の一方の面に当接する鍔状部を設け、この鍔
状部に貫通穴を設けると共に、該貫通穴内に紫外線硬化
型接着剤を一部が貫通穴の上部に若干はみ出して抜け止
め用の頭部を形成する状態で注入充填し、しかる後、上
記紫外線硬化型接着剤に紫外線を照射して上記接着剤を
硬化させることによって樹脂基板にセンターハブを接着
することを特徴とする光ディスクの製造方法。1. A method for manufacturing an optical disk, comprising: a resin substrate having at least an optical recording layer, and a metal center hub bonded to a central portion of the substrate, wherein the center hub is provided on one surface of the resin substrate. And a through hole is provided in the flange portion, and a part of the ultraviolet-curing adhesive is slightly protruded above the through hole in the through hole to form a head for retaining. A method of manufacturing an optical disk, comprising: injecting and filling in a state, and then irradiating the ultraviolet curable adhesive with ultraviolet light to cure the adhesive, thereby bonding a center hub to a resin substrate.
JP3280510A 1991-09-30 1991-09-30 Optical disc manufacturing method Expired - Fee Related JP3065401B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3280510A JP3065401B2 (en) 1991-09-30 1991-09-30 Optical disc manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3280510A JP3065401B2 (en) 1991-09-30 1991-09-30 Optical disc manufacturing method

Publications (2)

Publication Number Publication Date
JPH0594643A JPH0594643A (en) 1993-04-16
JP3065401B2 true JP3065401B2 (en) 2000-07-17

Family

ID=17626105

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3280510A Expired - Fee Related JP3065401B2 (en) 1991-09-30 1991-09-30 Optical disc manufacturing method

Country Status (1)

Country Link
JP (1) JP3065401B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4108845B2 (en) 1998-11-12 2008-06-25 富士フイルム株式会社 Magnetic tape cartridge reel molding method
FR3024458B1 (en) * 2014-08-01 2018-03-09 Compagnie Plastic Omnium METHOD FOR COLLABLY ASSEMBLING TWO PARTS OF A MOTOR VEHICLE

Also Published As

Publication number Publication date
JPH0594643A (en) 1993-04-16

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