• 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:
    In a synthetic press roll to be used in a paper machine the surface layer of the cylinder mantle of the press roll is composed of a mixture of a metal powder and a powder of an inorganic material. The metal component may be copper, bronze, stainless steel, nickel, chromium, and/or a titanium alloy, and the inorganic powder consists of quartz, feldspar, Al2O3, ZrO2, TiO2, TiC, SiC, MgO, Si3N4, Cr2O3, WC, Nbc, VC, Cr7C3, or of a corresponding ceramic material or of mixtures of same. The roll face is produced by thermal spraying, casting, by winding a sintered and/or rolled band around the cylinder, or by using a flexible mat in which the desired mix is bound by means of PTFE and in which the pre-coating is fixed by melting by means of induction or laser heating. The press roll provides means by which the detaching of the paper web from the roll face is controlled and the resistance of the roll to variations in temperature and to mechanical strains is improved.
    公开号:SU1724019A3
    申请号:SU864011815
    申请日:1986-01-08
    公开日:1992-03-30
    发明作者:Миихкинен Вейо
    申请人:Валмет Ой (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to press rolls of paper machines and is intended for use in the paper industry.
    The purpose of the invention is to provide high-quality processing of the paper web by improving the performance characteristics of the roller.
    This goal is achieved in that a press roll comprising a cylindrical body and an outer coating of a material, consisting of a hydrophobic component and a hydrophilic component based on an inorganic powder, as a hydrophobic component, the material of the outer coating contains metal powder of copper, bronze, stainless steel, nickel, chromium and / or titanium alloy as an inorganic
    powder, quartz, feldspar, A120z. 2G02, TiO2, TiC, SiC, MgO, Si3N4, Cr2Oz, WC, NbC, - VC, W2C, TaC, M02C, while neo-Vj chemical powder is 15-85 parts by volume of the total material fV of the outer coating, and its particle size Ј) 5-500 µm.
    The paper machine roll is prepared as follows. 7 /
    The pressure roller is made by J creating a surface layer on the roller (e) by thermal spraying. The surface of the roller is formed by a casting method. In addition, the surface of the roller can be obtained by winding a sintered and / or laminated band on a cylinder. The surface of the press roll is also obtained using a flexible mat consisting of a predetermined mixture of polytetrafluoroethylene, the coating, which is prefabricated, is fixed to the roller body by melting during induction heating with a laser, etc.
    The purpose of the metal is that it is a binder and increases the strength of the coating of the roller. The inorganic material provides wear resistance to the surface, since the surface energy of the roller must be within certain limits in order to be able to control the detachment of the paper strip from the pressure roller. The surface energy of granite, the surface properties of which provide a controlled detachment of the paper strip from the surface of the roller, varies as a function of surface roughness, with granite rollers operating at a surface energy in the range of 41-50 MJ / m2. The surface energy is divided into two components: distributed and field rnu. The distributed granite component is in the range of 32-33 MJ / m2, and the polar component varies in the range of 9-19 MJ / m2 as a function of the surface roughness.
    In addition to the nature of the surface material of the roller, a factor affecting the magnitude of the energy surface is also the ratio of hydrophilic and hydrophobic components to the surface. The proposed roller makes it possible to more accurately determine the value of the surface energy compared to what has been until now, while the energy is kept within certain predetermined limits. There are hydrophilic and hydrophobic groups in the paper strip, and the surface of the roller also has hydrophilic and hydrophobic components. Since the hydrophilic material repels the hydrophobic material and vice versa, controlled strip detachment is provided by mixing the hydrophilic and hydrophobic material in a predetermined ratio, while the surface energy of the pressure roller remains within the specified limits.
    Roller shells are made, for example, by casting. The body of the roller, having ends and pins, is the main element providing the necessary mechanical strength of the roller, and the specified surface properties of the cylindrical shell, as well as the mechanical strength of the surface, are provided by coating the roller.
    The roller coating is created by thermally spraying a mixture of copper and ceramic materials, such as A1aOz. SI02 and
    Zr02. The surface energy of copper is 39.4 MJ / m2, the distributed component is 36.4 MJ / m, and the polar component is 2.9 MJ / m2, i.e. copper is a hydrophobic component. The particle size of the copper powder is in the range of 5-40 µm, and the particle size of ceramic materials, for example AlaOa, varies in the range of 40-100 µm. The size
    0 particles larger than the particle size of copper so that the masses of the particles of copper and AfeOa are in the same range. In this way, it is possible to eliminate the separation of the powder components between themselves in the sputtering process. The amount of ceramic powder can vary in the range of 10-90 parts by volume of the total volume of the powder, a typical ratio is 30 parts by volume of copper and 70 parts
    0 by volume. Instead of copper, you can also use bronze, nickel and / or chromium-nickel alloys. Thermally sprayed powders can also be prepared so that the components of the powder
    5 were interconnected (metal ceramics).
    The roll coating of the machine can also be made by casting. In centrifugal casting, ceramic powder is selected at a density that is equal to or slightly greater than the density of the metal base. If the metal is, for example, copper, the density of which is 8.96 g / cm3, then the inorganic powder can be chosen
    5 for example, from the group which includes WaC, WC, TaC, MOaC, NbC, the density of which is 17.2, 15.7, 14.5, 9.2 and 7.8 g / cm3. With this technology, the ceramic material can be distributed over the surface layer. The surface layer of the press roll can also be cast in a continuous manner in a vertical position, in which case the inorganic material is fed as a powder to the surface of the melt in
    5 process pouring. The cold powder accelerates the melt crystallization, while the powder is evenly distributed along with the metal.
    When coating the roller by creating
    0 bandage, the necessary mixture of powders is compacted into a bandage by rolling, and then sintered.
    The bandage is wound on a cylindrical roller under tension, this results in
    5 specified coverage.
    Roller coating is also obtained using the sheet coating method. With this method, the desired powder mixture is mixed with glue in a mill, obtaining a flexible fabric. This fabric or web is wound onto a cylinder and is attached thereto by melting when heated, for example, by induction or laser.
    If the proportion of metal in the coating is large and is less than 15%, then its surface behaves like a ceramic coating, i.e. it lacks the plasticity of the metal, its surface is fragile like ceramics.
    If the roller coating contains more than 85% metal, the density of the wear-resistant particles on the surface is too low. Another effect of an excessive metal content is the poorer separation of the web from the roll surface.
    For example, a 45% metal content is suitable for a press roll in a modern paper making machine that is subjected to high pressure between rolls.
    The particle size of the inorganic powder less than 5 microns cannot be effectively used, because when the powder particles are introduced into the flame, they tend to clump or agglomerate to form lumps, and when the particle size exceeds 500 microns, the particles will not expand accordingly. flame and, therefore, the jet will contain the molten mass, as well as incompletely molten particles.
    权利要求:
    Claims (1)
    [1]
    The invention The press roller of a papermaking machine comprising a cylindrical body and an outer coating of a material consisting of a hydrophobic component and a hydrophilic component based on an inorganic powder, characterized in that in order to ensure the quality processing of the paper web by improving the performance characteristics of the roller, as hydrophobic component outer coating material contains metallic powder of copper, bronze, stainless steel, nickel, chromium and / or titanium Vågå alloy, and as the inorganic powder, quartz, feldspar, A120z. Zr02, TiO2, TIC, SIC, MgO, SlaN4, Cr203, WC, NbC, VC, CaC3, W2C, TaC, M02C, while the inorganic powder constitutes 15-85 parts by volume of the total material of the outer coating, and its size particles 5-500 microns.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1724019A3|1992-03-30|Paper-making machine press roller
    JP2676339B2|1997-11-12|Method for manufacturing press roll for papermaking machine
    FI80097B|1989-12-29|VALS I PRESSPARTIET AV EN PAPPERSMASKIN OCH FOERFARANDE FOER FRAMSTAELLNING AV DENNA.
    EP0870868B1|2003-05-28|Press roll with ceramic coating for difficult corrosion conditions and method for manufacture of the roll
    US3962081A|1976-06-08|Ceramic foam filter
    CA2028335C|1998-07-07|Roll for use in the production of paper and method for the manufacture of the roll
    EP0830477B1|2001-06-13|Alloy coating for wet and high temperature pressing roll
    JPH0366457A|1991-03-22|Apparatus for controlling twin roll type continuous casting machine
    UA70317C2|2004-10-15|thermal shock-resistant ceramic article
    US5167068A|1992-12-01|Method for manufacturing a roll directly contacting a web
    CA1160423A|1984-01-17|Apparatus and method for chill casting of metalstrip employing a chromium chill surface
    US4856161A|1989-08-15|Press roll
    Paiva et al.1999|Processing and thermomechanical evaluation of fibre-reinforced alumina filters
    GB1596446A|1981-08-26|Manufacture of ceramic foams
    WO2000040355A1|2000-07-13|Refractory plates for continuous casting machines of thin flat products
    JP2589395B2|1997-03-12|Rolls for papermaking with excellent peelability
    JPH03133550A|1991-06-06|Roll in apparatus for directly and continuously casting thin strip from molten metal
    Miihkinen1986|Synthetic Press Roll for Paper Machine
    JP2004001070A|2004-01-08|Wc cermet-sprayed roll excellent in wear resistance
    JPH05179596A|1993-07-20|Roll for paper machine
    WO2008086896A1|2008-07-24|Paper machine roll with ceramic cover
    JPS5791866A|1982-06-08|Production of composite roll for rolling which is not constant in thickness of outside shell layer
    AT215608B|1961-06-12|Mold lining
    CA2069046A1|1992-12-21|Composition of matter for covering a roll
    JPH01258945A|1989-10-16|Vibration regulating metal plate with resistance to high temperature and its manufacture
    同族专利:
    公开号 | 公开日
    FI70273B|1986-02-28|
    CA1274997A|1990-10-09|
    US4951392A|1990-08-28|
    SE8600051L|1986-07-10|
    DE3546343A1|1986-07-10|
    FI850107A0|1985-01-09|
    SE8600051D0|1986-01-07|
    GB2169381A|1986-07-09|
    SE463426B|1990-11-19|
    GB2169381B|1988-12-21|
    GB8600192D0|1986-02-12|
    JPH0656000B2|1994-07-27|
    FI850107A|1986-07-10|
    DE3546343C2|2001-03-01|
    JPS61207691A|1986-09-16|
    FI70273C|1986-09-15|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FI850107A|FI70273C|1985-01-09|1985-01-09|SYNTHETIC PRESS RELEASES FOR THE FRAMEWORK OF THE FRAMEWORK|
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