Metal deforming – By application of fluent medium – or energy field – Using fixed die
Patent
1983-12-01
1985-11-12
Gilden, Leon
Metal deforming
By application of fluent medium, or energy field
Using fixed die
72345, 72465, B21D 2200
Patent
active
045520046
ABSTRACT:
A method and apparatus for making golf ball molds is disclosed. The molds are made by placing a smooth, hemispherical metal cup on top of a dimpled, hemispherical master mold, which is the upper end of a bullet-shaped mounting post. The post is fixed in an upright position to the lower half of a hydraulic press.
Above the post is a vertically movable upper press half with a urethane insert. The insert has a smooth hemispherical recess or cavity that is designed in size and shape to blanket the top surface of the cup when the press halves are pushed together.
When the press halves are pushed together, the urethane insert covers the cup and pushes against it with extreme force. The insert serves basically as a hydraulic fluid and transforms the linear forces produced by the hydraulic press into a uniform pressure acting equally in all directions against the cup.
Due to the tremendous pressure exerted by the press, the insert forces the metal cup to assume the dimpled shape of the underlying master mold. Afterwards, the press halves are moved apart and the cup is then stripped from the master, with the resulting product basically being an exact replica of the master mold.
REFERENCES:
patent: 2390803 (1945-12-01), Marschner
patent: 2722038 (1955-11-01), Freund
patent: 3183696 (1965-05-01), Way et al.
patent: 3543380 (1970-12-01), Hagopian
patent: 3831423 (1974-08-01), Brown et al.
patent: 3867078 (1975-02-01), Porter
patent: 3910095 (1975-10-01), Hartey
patent: 4111024 (1978-09-01), Dahlman
patent: 4130623 (1978-12-01), Walter
patent: 4162625 (1979-07-01), Simmons
Barfield Gilbert
Hagopian Gary J.
Gilden Leon
Holland Donald S.
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