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    • 4. 发明授权
    • Molten metal discharging device
    • 熔融金属放电装置
    • US4583721A
    • 1986-04-22
    • US581359
    • 1984-02-17
    • Kazumi ArakawaMasuo SugieTakashi WatanabeTakumi NishioToshio KawamuraTsutomu NagahataTakashi Matsushita
    • Kazumi ArakawaMasuo SugieTakashi WatanabeTakumi NishioToshio KawamuraTsutomu NagahataTakashi Matsushita
    • F27D3/14B22D11/10B22D37/00B22D41/42B22D41/08
    • B22D41/42
    • A molten metal discharging device including a stationary plate of refractory material and adapted to be mounted at a bottom portion of a container for accommodating molten metal, the stationary plate having a molten metal passage bore for permitting the molten metal from the container to be discharged therethrough, and a slide plate of refractory material slidable along a lower face of the stationary plate and adapted to open or close the passage bore by being slidably displaced relative to the stationary plate, wherein the stationary plate includes a stationary plate main body having the passage bore therein, at least a major part of the main body being made of porous refractory material, the stationary plate main body having a chamber around a circumferential wall part of the passage bore and a gas introduction hole communicated with the chamber for introducing a gas from outside into the chamber, the circumferential wall part having gas supply hole elements for supplying the gas therethrough from the chamber to the passage bore enables to reduce the heat dissipation through the stationary plate and to thereby reduce the risk of clogging of the molten metal passage bore in the stationary plate due to the solidification of the molten metal or the like.
    • 一种熔融金属排出装置,包括耐火材料的固定板,并且适于安装在用于容纳熔融金属的容器的底部处,所述固定板具有用于允许来自容器的熔融金属从容器中排出的熔融金属通道孔 以及耐火材料的滑板,其可沿着固定板的下表面滑动,并且适于通过相对于固定板可滑动地移动而打开或关闭通道孔,其中固定板包括具有通道孔的固定板主体 其中,主体的至少主要部分由多孔耐火材料制成,固定板主体具有围绕通道孔的周壁部分的腔室和与腔室连通的气体导入孔,用于从外部引入气体 在该室中,周壁部具有用于供给气体的气体供给孔元件 从腔室到通道孔的再通孔能够减少通过固定板的散热,从而降低由于熔融金属等的固化而使固定板中的熔融金属通道孔堵塞的危险。
    • 8. 发明授权
    • Molten metal discharging device
    • 熔融金属放电装置
    • US4632283A
    • 1986-12-30
    • US581510
    • 1984-02-17
    • Kazumi ArakawaMasuo SugieTakashi WatanabeTakumi NishioToshio KawamuraTsutomu NagahataTakashi Matsushita
    • Kazumi ArakawaMasuo SugieTakashi WatanabeTakumi NishioToshio KawamuraTsutomu NagahataTakashi Matsushita
    • B22D41/08B22D41/42
    • B22D41/42
    • A molten metal discharging device comprising:a stationary plate adapted to be mounted at a bottom portion of a container accomodating molten metal, the stationary plate having a molten metal passage bore for permitting the molten metal from the container to be discharged therethrough, anda slide plate slidable along a lower face of the stationary plate and adapted to open or close the passage bore by being slidably displaced relative to the stationary plate, in whicha circumferential wall of the passage bore in the stationary plate is made of dense refractory material and the circumferential wall made of the dense refractory material has a plurality of gas supply holes therein for permitting a gas to be supplied into the passage borehas less fear that the passage bore thereof may be blocked by the solidification of the molten metal and/or deposition of metal oxides and has an improved resistance against corrosion by the molten metal.
    • 一种熔融金属排出装置,包括:固定板,其适于安装在容纳熔融金属的容器的底部,所述固定板具有用于允许来自容器的熔融金属从其中排出的熔融金属通道孔, 板可沿着固定板的下表面滑动并且适于通过相对于固定板可滑动地移动而打开或关闭通道孔,其中固定板中的通道孔的周向壁由致密的耐火材料制成,并且 由致密耐火材料制成的周壁在其中具有多个气体供应孔,用于允许气体供应到通道孔中,较少担心其通道孔可能被熔融金属的凝固所阻挡,和/或沉积 金属氧化物,并且具有改善的耐熔融金属腐蚀性。
    • 9. 发明授权
    • Refractory slide-gate plate
    • 耐火滑门板
    • US5958279A
    • 1999-09-28
    • US68105
    • 1993-05-28
    • Toshio KawamuraKazuhide KawaiShigeki Niwa
    • Toshio KawamuraKazuhide KawaiShigeki Niwa
    • B22D11/10B22D41/28B22D41/32B22D41/42B22D41/08
    • B22D41/42B22D41/28
    • A refractory slide-gate plate including a refractory base plate which is designed in a ring shape or so as to have a recess portion on a surface thereof, a refractory plate member which is fixedly engaged with the inside of the ring-shaped refractory base plate or with the recess portion of the refractory slide-gate to be integrated with the refractory base plate, and an inert gas supply groove comprising a step portion which is formed in 2 to 20 mm width and in 2 to 20 depth on at least one of the inner peripheral portion of the ring-shaped refractory base plate and the inner peripheral portion of the recess portion. The refractory plate member is preferably formed of Al.sub.2 O.sub.3 --ZrO.sub.2 --C-based refractory material or ZrO.sub.2 -based refractory material.
    • 一种耐火滑动门板,包括设计成环形或在其表面上具有凹部的耐火基板,与所述环形耐火基板的内侧固定接合的耐火板构件 或者与耐火材料滑动门的凹部一起与耐火基板一体化;以及惰性气体供给槽,其包括阶梯部,该台阶部在宽度为2〜20mm,深度为2〜20度的至少 环状耐火基板的内周部和凹部的内周部。 耐火板构件优选由Al2O3-ZrO2-C系耐火材料或ZrO 2系耐火材料形成。
    • 10. 发明授权
    • Radiation shielding material and producing method thereof
    • 辐射屏蔽材料及其制备方法
    • US5908884A
    • 1999-06-01
    • US931617
    • 1997-09-16
    • Toshio KawamuraToshihisa AdachiMitsunori Kobayashi
    • Toshio KawamuraToshihisa AdachiMitsunori Kobayashi
    • G21F1/08B29C35/02B29K27/12B29K105/16C08K3/04C08K3/08C08L21/00G21F1/10C08K3/10C08K3/22
    • G21F1/106C08K3/08
    • Tungsten powder which is a material of high radiation absorptivity is dispersed into unvulcanized fluoro rubber in advance so that the mixture is vulcanized and molded. As the powder of material of high radiation absorptivity, powder having an F.s.s.s. particle size not larger than 50 .mu.m is used. Further, in the case where a mixture of powder having an F.s.s.s. particle size in a range of from 5 .mu.m to 50 .mu.m, and powder having an F.s.s.s. particle size in a range of from 0.5 .mu.m, to 5 .mu.m, is used as the powder of material of high radiation absorptivity, the powder of material of high radiation absorptivity has good tensile strength, good extensibility and more excellent radiation shielding ability, when the weight of the powder having a particle size in a range of from 4 .mu.m to 100 .mu.m is in a range of from 60% by weight to 95% by weight, and the weight of the powder having a particle size smaller than 4 .mu.m is in a range of from 5% by weight to 40% by weight. Both the powder and the vulcanized rubber containing carbon powder have electrical conductivity, so that electromagnetic wave shielding ability is added. In addition, the vulcanized rubber is vulcanized fluoro rubber which is excellent in heat resistance and chemical resistance.
    • 作为高放射线吸收性的材料的钨粉预先分散在未硫化的氟橡胶中,使混合物硫化和成型。 作为高辐射吸收性材料的粉末,粉末具有F.s.s.s. 使用不大于50μm的粒径。 此外,在具有F.s.s.s. 粒度在5微米到50微米的范围内,粉末具有F.s.s.s. 使用粒径在0.5μm至5μm的粒径作为高辐射吸收材料的粉末,高辐射吸收材料的粉末具有良好的拉伸强度,良好的延展性和更优异的辐射屏蔽能力, 当粒度在4μm至100μm的范围内的粉末的重量在60重量%至95重量%的范围内时,粉末的重量小于 4μm在5重量%至40重量%的范围内。 粉末和含有碳粉末的硫化橡胶都具有导电性,从而增加了电磁波屏蔽能力。 此外,硫化橡胶是耐热性和耐化学性优异的硫化氟橡胶。