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    • 6. 发明公开
    • METHOD AND DEVICE FOR EXTRUDING PLASTICIZED POWDERED MATERIALS (VARIANTS)
    • VERFAHREN UND VORRICHTUNG ZUM EXTRUDIEREN PLASTIFIZIERTERPULVERFÖRMIGERSTOFFE(VARIANTEN)
    • EP3006175A1
    • 2016-04-13
    • EP13885825.3
    • 2013-05-29
    • Obshchestvo s Ogranichennoy Otvetstvennostyu "Avtoklavy Vysokogo Davleniya I Temperatury"
    • GUBENKO, Lev AnatolyevichPERELMAN, Vladimir Evseevich
    • B28B3/22B29C47/12
    • B29C47/12B28B3/26B29C47/0004B29C47/0009B29C47/0869B29K2023/0683B29K2105/0038B29K2105/251B29K2509/02
    • The invention relates to the field of producing long, pressed powder blanks by extrusion. The technical result of the invention is an increase in the density and uniformity of articles. A method for extruding plasticized powdered materials comprises forming a part blank from a material and forcing the part blank along an extrusion axis through a deformation channel having a variable cross-section. As the material is forced through the deformation channel, it is subjected to the simultaneous effect of oppositely signed cyclic drawing, shear and torsional strains as a result of the creation in the material of two oppositely signed cyclic compressive strains which are orthogonal to the extrusion axis and act in antiphase. The maximum increases in one of these compressive strains are set for the material in a plane which passes through the extrusion axis. The maximum increases in the second of these compressive strains are set for the material at the inlet and outlet of the deformation channel, orthogonal to the plane which passes through the extrusion axis. As the material is forced through the deformation channel, the directions of the maximum increases in the second compressive strain are changed by means of the rotation thereof about the axis of the channel according to any smooth periodic function having a period equal to the length of the deformation channel and an amplitude equal to 15-75°.
    • 本发明涉及通过挤出生产长压制粉末坯料的领域。 本发明的技术结果是物品的密度和均匀性的增加。 用于挤出增塑粉末材料的方法包括从材料形成零件坯料并且沿着挤出轴线迫使零件坯件通过具有可变横截面的变形通道。 当材料被迫通过变形通道时,由于在与挤出轴正交的两个相反的循环压缩应变的材料中产生的结果,它受到相反的循环拉伸,剪切和扭转应变的同时作用 并反相行事。 在通过挤出轴的平面中的材料中设定这些压缩应变之一的最大增加。 这些压缩应变的第二次的最大增加是对于通过挤出轴线的平面垂直的变形通道的入口和出口处的材料设定的。 当材料被迫通过变形通道时,第二压缩应变中最大增加的方向通过围绕通道的轴线的旋转而改变,根据任何平滑的周期函数,其周期等于 变形通道和幅度等于15-75°。