Modeling of air back pressure in die-casting dies

被引：1
|
作者：
Lee, W.B. [1 ]
Lu, H.Y. [1 ]
机构：
[1] Dept. of Manufacturing Engineering, Hong Kong Polytech. Univ., Hung Hom, Kowloon, Hong Kong
来源：
Journal of Materials Processing Technology | 1999年 / 91卷 / 01期
关键词：
Differential equations - Flow of fluids - High pressure effects - Liquid metals - Mathematical models - Vents;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In high-pressure die-casting, molten metal is injected into a die cavity at a high velocity. The metal entering into the cavity expels the air from the cavity through the vents. Air back pressure will be created when the volume of metal flow exceeds the volume of air escaping out of the die cavity. A new mathematical model is proposed for the calculation of the creation of the back pressure in a die cavity. Air discharge through vents is modeled by the Poiseuille flow. The differential equation of the time rate of change of the back pressure is derived. The creation of the back pressure is correlated with the configuration sizes of the vent, and computations are carried out for different configurations of the vent geometry.
引用
收藏
页码：264 / 269
相关论文
共 50 条
  • [21] Hydrogen Embrittlement Characteristics of a Die-Casting Die after a High-Pressure Die-Casting Operation
    Mitsuhiro Okayasu
    Katsunori Shigematsu
    International Journal of Metalcasting, 2024, 18 : 810 - 820
  • [22] LOW-PRESSURE DIE-CASTING
    HARTLEY, J
    ENGINEERING MATERIALS AND DESIGN, 1975, 19 (07): : 21 - 22
  • [23] MACHINES FOR VACUUM PRESSURE DIE-CASTING
    KOMISSAR.VA
    RUSSIAN ENGINEERING JOURNAL-USSR, 1968, 48 (07): : 80 - &
  • [24] Hydrogen Embrittlement Characteristics of a Die-Casting Die after a High-Pressure Die-Casting Operation
    Okayasu, Mitsuhiro
    Shigematsu, Katsunori
    INTERNATIONAL JOURNAL OF METALCASTING, 2024, 18 (01) : 810 - 820
  • [25] LOW-PRESSURE DIE-CASTING
    PALMER, J
    HOWARD, P
    STROWBRIDGE, M
    ENGINEERING, 1981, 221 (04): : R1 - R7
  • [26] HARD INCLUSIONS IN PRESSURE DIE-CASTING
    LIPHARDT, WF
    DIE CASTING ENGINEER, 1987, 31 (04): : 42 - &
  • [27] Corrosion tests of PVD coatings with die lubricant used for Al high-pressure die-casting dies
    Lugscheider, E.
    Barimani, C.
    Guerreiro, S.
    Bobzin, K.
    Surface and Coatings Technology, 1998, 108-109 (1-3): : 408 - 412
  • [28] PRESSURE DIE-CASTING AND MANAGEMENT - REPORT ON THE 9TH INTERNATIONAL PRESSURE DIE-CASTING EXHIBIT, BASEL
    MALLE, K
    WERKSTATTSTECHNIK ZEITSCHRIFT FUR INDUSTRIELLE FERTIGUNG, 1980, 70 (12): : 803 - 805
  • [29] MATERIALS ON DIES FOR PRESSURE DIE CASTING
    Ragan, E.
    Dobransky, J.
    Baron, P.
    Olejar, T.
    METALURGIJA, 2012, 51 (01): : 117 - 120
  • [30] Corrosion tests of PVD coatings with die lubricant used for Al high-pressure die-casting dies
    Lugscheider, E
    Barimani, C
    Guerreiro, S
    Bobzin, K
    SURFACE & COATINGS TECHNOLOGY, 1998, 108 (1-3): : 408 - 412
12345