| 摘要 |
PROBLEM TO BE SOLVED: To precisely control the temperature of molds; and to realize inexpensive and highly precise press-forming. SOLUTION: A press-forming apparatus 1 produces a desired formed article by heating or pressurizing a raw material G arranged between an fixed upper mold 11 and a movable lower mold 12. The press-forming apparatus 1 is equipped with an induction coil 20 with a tap 20t, which coil is fixed at the periphery of the upper mold 11 and the lower mold 12, and a high-frequency electric power source 21 for supplying high-frequency current to the induction coil 20. It is possible to change the number of windings of the induction coil 20, effective for forming magnetic field at the periphery of the upper mold 11 and the lower mold 12, and to change the position of the magnetic field formed by the induction coil 20 by switching the tap of the induction coil 20 by operating a tap exchanger 22. COPYRIGHT: (C)2004,JPO
|
