Process of making a casting nozzle

Details Process of making a casting nozzle Process of making a casting nozzle

1987-08-25

1989-09-19

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

264 43, 264 44, 264 59, 264 60, 264155, 264256, 264317, 264DIG44, B22D 4108, B29C 4302, B29C 6720

Patent

active

048679321

ABSTRACT:
A process is disclosed for making a casting nozzle wherein gas can be blown out through the outlet of the nozzle to prevent the sticking of nonmetallic impurities to the nozzle during use. Reticulate organic filaments in the form, e.g., of a net are applied around a preformed inner cylindrical refractory body having a pouring hole therein. An outer cylinder body is then formed around the inner cylinder body including the organic filaments. The entire body is then fired, whereby the organic filaments carbonize and evaporate, leaving a network of gas-permeable reticulate holes in the body. An outlet is drilled or cut in the fired body through the gas-permeable holes to the pouring holes. Accordingly, when the nozzle is in use, a blowing gas can be provided through the reticulate holes to the nozzle outlet to prevent the sticking of nonmetallic impurities.

REFERENCES:
patent: 3533753 (1970-10-01), Berger
patent: 3758652 (1973-09-01), Jebens
patent: 4225544 (1980-09-01), Dantzig et al.
patent: 4583721 (1986-04-01), Arakawa et al.
patent: 4588112 (1986-05-01), Kondo
patent: 4632283 (1986-12-01), Arakawa et al.
patent: 4650619 (1987-03-01), Watanabe
patent: 4664858 (1987-05-01), Kido et al.
patent: 4682718 (1987-07-01), Watanabe et al.
patent: 4687607 (1987-08-01), Shigeta et al.

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