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    • 11. 发明专利
    • Method of manufacturing bottomed cylindrical sintered body
    • 制造底部圆柱形烧结体的方法
    • JP2011003548A
    • 2011-01-06
    • JP2010182007
    • 2010-08-17
    • Hitachi Powdered Metals Co Ltd日立粉末冶金株式会社
    • ISHIJIMA ZENZOOKAHARA MASAHIROMURASUGI NARUTOSHI
    • H01J9/02H01J61/067
    • B22F5/10B22F2001/0066B22F2998/00B22F2998/10B22F3/03B22F3/1021B22F2201/10B22F1/0077B22F3/02
    • PROBLEM TO BE SOLVED: To provide a method capable of manufacturing a bottomed cylindrical sintered body having high formability, an outer circumference of about 3.0 mm or smaller, that is, a small diameter, and a thickness of about 0.1 to 0.3 mm at low cost.SOLUTION: The method sequentially includes: a raw material-preparing step of preparing a raw material by adding 40 to 60 vol.% of binder including thermoplastic resin and wax to metal powder and then heating and kneading it; a filling step of filling a die hole of a press-molding die with a predetermined amount of the raw material; a pressurizing/molding step of molding the raw material in the press-molding die into a shape of a cup by pressurizing the raw material in a vertical direction using a punch; an extracting step of extracting a cup-shaped compact obtained after the pressurizing/molding step; a de-binder step of removing the binder by heating the extracted cup-shaped compact; and a sintering step of diffusing and bonding the powder by heating the cup-shaped compact from which the binder is removed.
    • 要解决的问题:为了提供一种能够制造成型性高的有底圆柱形烧结体的方法,外径为约3.0mm或更小,即小直径,厚度为约0.1至0.3mm,低成本 该方法依次包括:原料准备步骤,通过向金属粉末中加入40〜60体积%的包含热塑性树脂和蜡的粘合剂,然后加热和捏合来制备原料; 填充步骤,用预定量的原料填充压模模具的模孔; 加压/成型步骤,通过使用冲头将原料在垂直方向上加压成型,将加压成型模具中的原料成型为杯状; 提取步骤,提取在加压/成型步骤后获得的杯状压块; 脱粘合剂步骤,通过加热提取的杯形压块来去除粘合剂; 以及烧结步骤,通过加热去除粘合剂的杯形压块来扩散和粘合粉末。