PURPOSE: To thin a clock with the quality of the external appearance being uniform and stabilized by continuously executing the push back, planishing and surface finishing of the external shape of the pointer for a clock in the state of a strip.
CONSTITUTION: The push back of the external shape of the pointer 5 for clock is performed by continuously pressing the strip 1 contg. a trapezoidal hole 2. The strip 1 contg. the pointer 5 for clock that the hole 2 and external shape are pushed back is subjected to planishing by continuous pressing and the both faces of the strip 1 and those of the pointer 5 for clock are made on the same level. The surface finishing 6 of a diamond cutting, horning, etc., is executed on the surface part of the strip 1 contg. the pointer 5 for clock that the trapezoidal hole and external shape are pushed back. The coated finishing layer of plating, painting, etc., is then formed on the surface of the pointer 5 for clock at the final time when the pointer 5 is removed from the strip 1 by bending the strip 1 contg. the pointer 5 that the hole 2 and external shape are pushed back.
WO/1991/004808 | METHOD AND APPARATUS FOR ALIGNING MATING FORM TOOLS |
JP2859841 | [Title of Invention] Punch unit |
JP3308193 | DIE SET AND DIE DEVICE |
FUJIMORI MASAHIKO
MIKUNI KOGYO KK