Metal object forming method utilizing freezing point depression of molten metal
AssigneeFujitsu Limited
InventorsMasanobu Ishiduka, Noriyasu Aso, Kouta Nishii, Koichi Kimura
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Abstract
A metal object forming method includes a preliminary step and a metal-injecting step. At the preliminary step, flowability-improving material is put in a molding die. Then, at the metal-injecting step, molten metal is poured into the die for producing a casting. Due to the high temperature of the molten metal, the flowability-improving material melts into the molten metal, to cause the freezing point depression of the molten metal.
Claims12
A metal object forming method comprising:
- apreliminary step of coating a molding die with a lubricant comprising flowability-improving metal particles which melt into molten metal and causes freezing point depression of the molten metal;
- and
- an injecting step of supplying the molten metal into the die for producing a casting.
A metal object forming method comprising:
- a preliminary step of coating a molding die with a lubricant comprising a flowability-improving material which melts into molten metal and causes freezing point depression of the molten metal;
- and
- an injecting step of supplying the molten metal into the die for producing a casting, wherein the flowability-improving material comprises metal particles contained in lubricant, the lubricant being applied to a cavity-defining surface of the die at the preliminary step, and the molten metal being supplied at a temperature high enough to melt at least part of the metal particles at the injecting step.
A metal object forming method comprising:
- a preliminary step of providing a molding die with flowability-improving material which melts into molten metal and causes freezing point depression of the molten metal;
- and
- an injecting step of supplying the molten metal into the die for producing a casting, wherein
- the flowability-improving material comprises metal particles contained in lubricant,
- the lubricant is applied to a cavity-defining surface of the die at the preliminary step,
- the molten metal is supplied at a temperature high enough to melt at least part of the metal particles at the injecting step, and
- the lubricant contains 5˜30 wt % of the metal particles.
A metal object forming method comprising,
- a preliminary step of providing a molding die with flowability-improving material which melts into molten metal and causes freezing point depression of the molten metal;
- and
- an injecting step of supplying the molten metal into the die for producing a casting, wherein
- the flowability-improving material comprises a metal plate, the metal plate being disposed on a cavity-defining surface of the die at the preliminary step, and
- the molten metal is supplied at a temperature high enough to melt at least part of the metal plate at the injecting step.
A metal object forming method comprising:
- a preliminary step of providing a molding die with flowability-improving material which melts into molten metal and causes freezing point depression of the molten metal;
- and
- an injecting step of supplying the molten metal into the die for producing a casting, wherein
- the flowability-improving material includes zinc,
- the molten metal includes magnesium, and
- the flowability-improving material comprises an alloy containing 60˜95 wt % of zinc and 5˜40 wt % of tin.
Dependencies are inferred from the claim text.