Die casting machine

Details Die casting machine Die casting machine

2007-05-01

2007-05-01

Lin, Kuang Y. (Department: 1725)

Metal founding

Process

Shaping liquid metal against a forming surface

C164S267000, C164S312000

Reexamination Certificate

active

11165646

ABSTRACT:
A lubricant oil feeder2of a due casting machine1is made up of a lubricant oil feed passage19for feeding a lubricant oil into a clearance between the inner peripheral surface of a sleeve7and the outer peripheral surface of an injection piston9, a lubricant oil feed valve20for opening or closing the lubricant oil feed passage, an air feed passage16for feeding air into a clearance between the inner peripheral surface of the sleeve and the outer peripheral surface of the injection piston, and an air feed valve18for opening and closing the air feed passage, and the arrangement is such that the lubricant oil feed valve is initially opened to feed the lubricant oil into the clearance between the sleeve and the injection piston and the air feed valve is then opened to pump the lubricant oil by the air.It is possible to spread the lubricant oil extensively and quickly, and accordingly, the useful life of the sleeve and the injection piston can be improved with a reduced quantity of lubricant oil. The generation of gas a a result of a reaction with molten metal within the sleeve can also be suppressed, thus allowing the occurrence of a casting cavity to be prevented and the quality of a product to be improved.

REFERENCES:
patent: 3767012 (1973-10-01), Jimi et al.
patent: 6752197 (2004-06-01), Mortari
patent: 06-142877 (1994-05-01), None
patent: 11-077274 (1999-03-01), None

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