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51. 发明专利

JPS60202556A PRODUCTION OF OPTICAL DISK 失效
公开(公告)号：JPS60202556A
公开(公告)日：1985-10-14
申请号：JP5822784
申请日：1984-03-28
申请人： HITACHI LTD
发明人： YOSHII MASAKI , EBINUMA NAOTAKE , KANEDA AIZOU
IPC分类号： G11B7/26
摘要： PURPOSE:To attain the writing and reproducing actions up to a signal track of the most outer circumference with no tracking defect, by increasing the size of an information storage member more than the final outer diameter, shifting the distortion generating area to the outside of an information signal transcribing area and obtaining a desired outer diameter after prescribed process. CONSTITUTION:The inner diameter (d) of an outer circumferential ring 16 of a molding tool 6 is set at ''d>300mm. + molding shrinkage amount + 0.5mm. finishing margin + (6-10mm.)'', and only the outer diameter D of an information storage member 2 that is molded is increased. The molding shrinkage amount of the PMMA resin is set at about 1mm., and the obtained member 2 produces a distortion 15 through molding at the outside of an information signal pit transcribing area 14. Thus the track of the information signal pit is never deformed any more, and a reflecting film 3 of Al is vapor-deposited to a signal pit transcribing surface side 12 of the member 2. A protection film 4 is formed and the member 2 to which a different type of information is transcribed is bonded to the protection film 4 with the side 12 put inside with an adhesive 5 of the rubber hot-melt, etc. Then the outer circumference is cut to finish the final desired outer diameter phi300mm. 17.

52. 发明专利

JPS6080143A INFORMATION STORAGE MEMBER 失效
公开(公告)号：JPS6080143A
公开(公告)日：1985-05-08
申请号：JP18840083
申请日：1983-10-11
申请人： HITACHI LTD
发明人： EBINUMA NAOTAKE , YOSHII MASAKI , KANEDA AIZOU
IPC分类号： G11B7/24 , G11B23/00
摘要： PURPOSE:To improve the heat resistance and durability of an information recording member by forming depressed and projected parts on the surface of a light metallic disk for reinforcement which is bonded to a plastic disk. CONSTITUTION:A light metallic reinforcement disk 1 made of an aluminum press plate is bonded to a plastic disk 2 for storage of information which is made of PMMA to obtain an information recording member. Then concentric or radial lines are formed on the surface of the disk 1 or many circular hollows are formed on the disk 1 to increase the heat dissipating surface area. Thus it is possible to improve the heat resistance and durability of the information recording member.

53. 发明专利

JPS6011326A MOLD 失效
公开(公告)号：JPS6011326A
公开(公告)日：1985-01-21
申请号：JP11833483
申请日：1983-07-01
申请人： HITACHI LTD
发明人： EBINUMA NAOTAKE , YOSHII MASAKI , SATOU HIDEMI , KANEDA AIZOU
IPC分类号： B29C45/43 , B29C45/26 , B29C45/40 , B29C45/83 , B29L17/00
摘要： PURPOSE:To provide a mold for injection molding an item such as a optical type information memory member or the like free from a drop out, by providing an air path for blowing air against an information signal pit transferring surface through a core gap where ejection cores are secured together. CONSTITUTION:The separation of a disk from a mold cavity surface is effected by the operations of an air ejector 16' and an ejector sleeve 10'. A station sleeve 9' is secured to a mold main body 1 by a positioning sleeve so that misalignment for the disk for optical type information recording would not occur. A stamper holder 8' allows a stamper 5 to be associated with a movable side mold 7. Through this association gap, ejecting air 16' enough for separating a disk replica 11 from the surface of the stamper 5 is blown. According to this arrangement, clean air free from dust, oil, oil mist, metal powder, etc. can be blown.

54. 发明专利

JPS5675814A METAL MOLD FOR SHAPING FORM IN PLASTIC 失效
公开(公告)号：JPS5675814A
公开(公告)日：1981-06-23
申请号：JP15250079
申请日：1979-11-27
申请人： HITACHI LTD
发明人： EBINUMA NAOTAKE , KANEDA AIZOU , AOKI MASAYOSHI
IPC分类号： B29B13/00 , B29C33/00 , B29C33/10 , B29C33/44
摘要： PURPOSE:To prevent changes in dimensions and damage caused to a shaped material when detaching it from a metal mold and effectuate high quality and yield rate by incorporating an air ejector chip in the metal sleeve of a metal mold. CONSTITUTION:An air ejector chip 3 is incorporated with a metal mold heretofore in use in a position where a projected pin passes through the mold. The upper surface of the chip is leveled with that of the cavity surface 13a of a lower mold 8A, while its lower surface is opened to an air passageway 9 made in the mold 8A, so that the chip pierces the lower mold. If pressurized air is sent through the passageway 9 from the outside, it reaches the interface between a shaped material 7 and a cavity 13 (that is, the cavity surface 13a) via the air-circulating passageway 4 of the air ejector chip 3. The air pressure is used to detach the shaped material 7 from the cavity surface 13a. Since the pressurized air is applied to the whole surface of the shaped material 7 touching the cavity, the external force is reduced. Thus, changes in dimensions and shape do not occur because excessive stress is not added to the shaped material 7.

55. 发明专利

JPS5349045A FLAMEERETARDANT POLYOLEFIN RESIN COMPOSITION 失效
公开(公告)号：JPS5349045A
公开(公告)日：1978-05-04
申请号：JP12280476
申请日：1976-10-15
申请人： HITACHI LTD
发明人： KIMURA HIDEKI , NAKAMURA SHIYOUZOU , EBINUMA NAOTAKE , NASHIMOTO MASARU , MIYOSHI AKIRA
IPC分类号： C08L23/00 , C08K3/22 , C08K5/04 , C08K9/00 , C08K9/04 , C08L7/00 , C08L21/00 , C08L23/02 , C08L51/00 , C08L51/02 , C08L77/00 , C08L101/00
摘要： PURPOSE:To prepare title composition having excellent melt flowability and improved impact resistance, comprising a polyolefin, a specific filler and carbon.

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