Part and the hallmark formation manner null for hallmark equipped ornament

摘要

PURPOSE:To prevent the abrasion at the time when the title parts is slid through the through hole on a clip and to improve the feeling of wear, by a method wherein the pin used for personal ornament with a decoration part has an almost cylindrical surface, and a stamp part hollowed along its cylindrical surface is formed. CONSTITUTION:The title parts has an ornament-fitting part 23 at the left end, and has a stamp 3 on the right side thereof, and has a groove part 4 near the more right side thereof. On the other hand, the stamp 3 is formed in the form of a concave like a recess 9, along the cylindrical surface of a pin 2. In this way, a deformation part is not swollen on the cylindrical surface of the pin, and hence when a clip is slid on the pin, they are not worn. There also are neither of the deformation part and a flat deformation part, and hence the feeling of wear on an ear-lobe is excellent. For the formation of the stamp, the pin 2 is placed on a work-holding part 24 of a slide 17 and then the slide 17 is lowered. While the pin 2 is held between the slide 17 and a die 18 by pressing, the pin 2 is rotated and lowered on the left side face of the die 18. When the slide 17 is furthermore lowered, the pin 2 passes a projection 15 for the stamp in the state of being pressed and held. At this time, the recess 9 owing to stamp is formed by the projection 15 for the stamp, along the cylindrical surface of the pin 2.