• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to the technology of producing fiberglass for optical fibers and improves the quality of compaction of powdered silica to a bulk density of 300 g / l without the use of a binder. According to this method of compaction of powdered silicon dioxide by pyrogenic means, it is first compacted in an open centrifuge, and then further compacted by a free-running piston in a centrifuge tank.
    公开号:SU1667634A3
    申请号:SU853947155
    申请日:1985-08-06
    公开日:1991-07-30
    发明作者:Гинтер Херберт；Клингель Райнхард；Маннер Райнхард
    申请人:Дегусса Аг (Фирма)；
    IPC主号:
    专利说明:

    This invention relates to a technology for producing glass fibers for optical fibers, which are obtained from extruded articles from pyrogenically produced silica powder.
    The purpose of the invention is to improve the quality of compaction of powdered silica to a bulk density of 300 g / l without the use of a binder.
    Example. Pyrogenically produced silica with a specific surface area of 50 g / m (trade name Aerosil OX 50 Degussa) was filled with centrifuge glasses with glass liners. The dimensions of the centrifuge glass cups are about 38 mm in internal diameter and about 100 mm in length with a volume of 100 cm. The centrifugal maximum centrifugal number achieved is 4000.
    The initial density of the silicon dioxide is 20 g / l. This silicon dioxide is compacted by centrifugal force. With this product at
    The average centrifugation rate of about 3200 is compacted to an average density of about 200 g / l. The acceleration time is 60 seconds.
    This product, thus sealed, is immediately subsequently sealed with the help of a freely flying (moving) piston made of steel (P 7.86 kg / dm3). The piston diameter is 37 mm and its height is 20 mm.
    The pistons are slid into glass cups until the pistons touch the pre-compacted product. Then the centrifuge is set in motion again, the pistons go outside and the pyrogenically produced silicon dioxide is further compacted.
    The centrifugation time is about 5 minutes to obtain a homogeneous molded product.
    After the piston is removed, it does not burst, but remains a homogeneous molded product.
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    3 16676344
    The formula of the invention for a mass of 300 g / l without the use of a binder,
    The method of compaction of the powder is last compacted first in the open
    silicon dioxide, obtained by pyrogenic centrifuge, and then close the container
    a path, characterized in that, in order to centrifuge freely moving in
    enhancing the quality of compaction with a piston-5 with a piston and producing additional silicon dioxide by it to a bulk compaction.
    权利要求:
    Claims (1)
    [1]
    Claim
    The method of compaction of powdered silicon dioxide obtained by pyrogenic method, characterized in that, in order to improve the quality of compaction of powdered * silica to a bulk density of 300 g / l without the use of a binder, the latter is first compacted in an open centrifuge, and then the centrifuge's container is closed with a freely moving in 5 with a piston and produce an additional seal.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1667634A3|1991-07-30|Method for packing silicon dioxide powder
    GB1476957A|1977-06-16|Process for the production of zeolitic molecular sieves
    US4620862A|1986-11-04|Process of fabricating an elongated glass body particularly a preform for optical waveguides
    GB1401450A|1975-07-16|Apparatus for mixing and injecting moulding materials into foundry moulds and core boxes
    EP0403743A3|1991-02-06|Method for molding powders
    JPS60208922A|1985-10-21|Acceleration of antigenic immunogen product by antibody
    JPH01156338A|1989-06-19|Prefoamed polypropylene resin particle and production thereof
    GB1412688A|1975-11-05|Method in vacuum packing of compressible material eg foodstuffsand similar products and an arrangement for the execution ofsaid method
    SU361011A1|1972-12-07|DEVICE FOR ISOSTATIC PRESSING
    JPS60131833A|1985-07-13|Manufacture of quartz glass
    SU1447574A1|1988-12-30|Apparatus for moulding articles from powders, the articles having inner cavities
    RU2018877C1|1994-08-30|Method of assembly of scintillation counter
    JPH04321532A|1992-11-11|Production of optical fiber reform
    ES8702782A1|1987-01-16|A double- or multi-walled thermos container of a ceramic material, and a method and a mould for producing it.
    RU2016701C1|1994-07-30|Method for making workpieces from powder and mold for carrying out the method
    JPS61168541A|1986-07-30|Production of quartz glass
    BG101066A|1997-12-30|Method for the manufacture of products for internal liningmade of gypsum-containing materials, and moulds for theirproduction
    RU2001118915A|2003-06-20|Carbon composite material for thick-walled products and method for its manufacture
    SU1727065A1|1992-04-15|Method of determining the composition of mixture of two fractions of loose materials
    SU1397177A1|1988-05-23|Method of producing elongated hollow articles having a bottom
    JPS60264335A|1985-12-27|Preparation of plate glass
    RU1797047C|1993-02-23|Manufacturing process for ultrasonic transducer damper
    JPS5554223A|1980-04-21|Manufacture of integrally formed metallic container of comparatively light weight
    IT1174929B|1987-07-01|Manual, pneumatic, vibration protected impact moulding appts.
    SU1763307A1|1992-09-23|Container for samples of ultra-pure solids
    同族专利:
    公开号 | 公开日
    US4680043A|1987-07-14|
    EP0172386A3|1988-02-17|
    DE3581016D1|1991-02-07|
    DE3429051C1|1986-02-13|
    AT59626T|1991-01-15|
    EP0172386A2|1986-02-26|
    JPS6148423A|1986-03-10|
    EP0172386B1|1991-01-02|
    JPH0137328B2|1989-08-07|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE570813C|1930-12-07|1933-06-03|Wilhelm Mueller Dr|Process for compacting heated sinter masses|
    US2304723A|1940-01-18|1942-12-08|Hammarbylampan Ab|Process for the manufacture of articles of sintered metallic constituents|
    CH221356A|1940-01-18|1942-05-31|Hammarbylampan Ab|Process for the manufacture of articles from sintered metal or sintered hard alloy.|
    US2960723A|1953-07-15|1960-11-22|Stark Howard John|Glass fiber forming machine|
    US3888662A|1973-02-09|1975-06-10|Kennametal Inc|Method of centrifugally compacting granular material using a destructible mold|
    US4271114A|1977-07-14|1981-06-02|General Electric Company|Method of compacting dry powder into shapes|
    DE3217965A1|1982-05-13|1983-11-17|Standard Elektrik Lorenz Ag, 7000 Stuttgart|METHOD FOR PRODUCING FIBERGLASS FOCUS|
    DE3240355C1|1982-11-02|1983-11-17|Heraeus Quarzschmelze Gmbh, 6450 Hanau|Process for the production of an elongated glass body with an inhomogeneous refractive index distribution|DE4142898A1|1991-12-23|1993-06-24|Sued Chemie Ag|Pyrogenic silica moulding used as catalyst support or catalyst - prepd. from paste in aq. alcoholic ammonia by moulding, drying and calcining|
    DE4142902A1|1991-12-23|1993-06-24|Sued Chemie Ag|Producing mouldings for catalytic use from pyrogenic silicic acid - by hydrothermally treating initially moulded body with ammonia contg. solution|
    US6156285A|1998-11-12|2000-12-05|Dow Corning Corporation|Method for densifying particulate silica|
    DE19936478A1|1999-08-03|2001-02-15|Degussa|Sintered materials|
    DE102006058813A1|2006-12-13|2008-06-19|Wacker Chemie Ag|Process for the preparation of stable, highly pure moldings from fumed metal oxides without the addition of binders|
    DE102006058800A1|2006-12-13|2008-06-19|Wacker Chemie Ag|Process for the preparation of catalysts and their use for the gas-phase oxidation of olefins|
    DE102006058799A1|2006-12-13|2008-06-19|Wacker Chemie Ag|Process for the preparation of stable binder-free high purity moldings from metal oxides and their application|
    US10139296B1|2017-05-05|2018-11-27|Richard AGOSTINELLI|Centrifuge calibration apparatus|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE3429051A|DE3429051C1|1984-08-07|1984-08-07|Process for the production of powders from powdery, pyrogenic silicon dioxide|
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