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    • 1. 发明申请
    • Production method for sintered part
    • 烧结部件的制造方法
    • US20090291012A1
    • 2009-11-26
    • US12320969
    • 2009-02-10
    • Masahiro OkaharaZenzo IshijimaMitsuo KusanoKazuya SuzukiToru Hirano
    • Masahiro OkaharaZenzo IshijimaMitsuo KusanoKazuya SuzukiToru Hirano
    • B22F3/12B22F1/00
    • B22F3/087B22F2001/0066B22F2003/033B22F2003/145B22F2999/00B22F2202/05B22F2203/11
    • A production method for a sintered part comprises preparing a metal powder and a binder composed of a thermoplastic resin and a wax, mixing the metal powder and 40 to 60 vol. % of the binder with respect to the metal powder into a mixed powder, and heating and kneading the mixed powder into a raw material. This production method further includes supplying a predetermined amount of the raw material in a hole of a die and compacting the raw material into a green compact having a predetermined shape by pressing the raw material by a punch. This production method further includes ejecting the green compact from the hole of the die, removing the binder from the ejected green compact by heating, and sintering the green compact by heating so as to diffusion bond particles of the green compact. The compacting is performed by pressing at a moving rate U of the punch, which is not more than a rate calculated from the following equation (1). In this case, ΔP (Pa) is pressing power of the punch, μ (Pa·s) is viscosity of the raw material, L (m) is a length of the green compact, and De (m) is a corresponding tube diameter. U=ΔP/(32μ×L)×De2   (1)
    • 烧结体的制造方法包括:将金属粉末和由热塑性树脂和蜡构成的粘合剂进行配合,将金属粉末和40〜60体积% %的粘合剂相对于金属粉末成为混合粉末,并将混合粉末加热和捏合成原料。 该制造方法还包括将预定量的原料供给到模具的孔中,并通过用冲头压制原料将原料压实成具有预定形状的生坯。 该制造方法还包括从模具的孔中排出生坯,通过加热从喷出的生坯中除去粘合剂,并通过加热烧结生坯以便生坯的扩散粘合颗粒。 通过按照冲头的移动速度U进行压制(不大于由下式(1)计算出的速率)来进行压实。 在这种情况下,DeltaP(Pa)是冲头的压力,mu(Pa.s)是原料的粘度,L(m)是生坯的长度,De(m)是相应的管直径 。 U = DeltaP /(32muxL)xDe2(1)
    • 2. 发明授权
    • Molding die and control method thereof
    • 成型模具及其控制方法
    • US08293164B2
    • 2012-10-23
    • US12037979
    • 2008-02-27
    • Mitsuo KusanoKazuya Suzuki
    • Mitsuo KusanoKazuya Suzuki
    • B29C35/12
    • B29C33/06B29C33/0022B29C33/04B29C33/08B29C43/36B29C43/52B29C43/58B29C2035/0816B29C2035/1616B29C2043/3618B29C2043/503B29C2043/5816B29L2031/712
    • The present invention provides a molding die and a control method thereof aimed at shortening cycle time from heating to cooling of a molding cavity of the die with a simple and inexpensive configuration. In a molding die equipped with a molding cavity to mold a base material, a magnetic die material is used for the molding cavity, cooling means to feed a refrigerant is installed inside the molding cavity along a molding face and heating means by high-frequency induction is installed around the cooling means, and the molding cavity is alternately heated and cooled repeatedly by the heating means and the cooling means when the base material is molded with the molding cavity. Here, the cooling means includes a tubular body installed in the molding cavity, feeds a refrigerant when the molding cavity is cooled, and is in a hollow state of not containing the refrigerant when the molding cavity is heated.
    • 本发明提供了一种成型模具及其控制方法,其目的是缩短从加热到模具的模腔的冷却的周期时间,其结构简单且便宜。 在具有模制基材的成型腔的成型模具中,将成型用的模具材料用于成型腔内,供给制冷剂的冷却装置沿着成型面安装在成型腔的内部,通过高频感应加热装置 安装在冷却装置周围,并且当基体材料用模制腔模制时,模制腔被加热装置和冷却装置重复地交替地加热和冷却。 这里,冷却装置包括安装在模制腔中的管状体,当模腔被冷却时供给制冷剂,并且当加热模制腔时处于不含制冷剂的中空状态。