A manufacturing apparatus for an accessory, including: a magazine holding unit in which a material magazine that holds a metal sheet material in a roll shape is arranged; a material feeding unit that repeats conveyance in which the metal sheet material is fed forward from the material magazine, and stop of the conveyance; a die-set unit that includes a die set which blanks the metal sheet material conveyed from the material feeding unit into a predetermined shape; a machining unit that bends a metal component formed by the blanking in the die-set unit; and a guide unit that is provided between the material feeding unit and the die-set unit, and that flattens and feeds the metal sheet material conveyed from the material feeding unit to the die-set unit, the guide unit including restricting the metal sheet material in a width direction of the metal sheet material.

This invention is hollow tubular earring with different surface patterns from the contrast of copper colour and silver colour. The tubular earring made of laminated copper and silver plates which provide an advantage in cost reduction. The purpose of creating this invention into the earrings is to avoid contact with the skin. Intaglio patterns performed by the CNC machine are capable to control identical patterns in manufacture process.

The manufacture process of this invention comprises sintering a plurality of metal plates into laminated stick, rolling the stick to reduce its thickness, control the identical intaglio patterns on the stick by the CNC machine, rolling the stick to expand patterns, drawing the laminated metal plates into metal tube, bending the metal tube into circular shape, assembling earring with silver end cap and ear post.

This invention is hollow tubular earring with different surface patterns from the contrast of copper colour and silver colour. The tubular earring made of laminated copper and silver plates which provide an advantage in cost reduction. The purpose of creating this invention into the earrings is to avoid contact with the skin. Intaglio patterns performed by the CNC machine are capable to control identical patterns in manufacture process.

The manufacture process of this invention comprises sintering a plurality of metal plates into laminated stick, rolling the stick to reduce its thickness, control the identical intaglio patterns on the stick by the CNC machine, rolling the stick to expand patterns, drawing the laminated metal plates into metal tube, bending the metal tube into circular shape, assembling earring with silver end cap and ear post.

An accessory includes a body that has a first hole surrounded by a first inner surface, and a component that has a first hole surrounded by a first inner surface to be engaged with the first inner surface. A method of manufacturing the component includes: a piercing step of forming, by blanking, the second hole through a sheet-like member of which the component is formed; a first reshaping step of swelling the second inner surface into the second hole by compressing a rim portion surrounding the second hole; a shearing step of cutting the component out of the sheet-like member; and a second reshaping step of rounding a tip portion of the second inner surface having swelled by the first reshaping. The second reshaping step includes barreling the component cut out by the shearing.

The present invention provides a mandrel tool and method for more efficiently and consistently forming various shapes of material. In one embodiment of the invention, a pair of pliers having mandrel jaws that are shaped with a uniform cross sectional area throughout a length of the mandrel jaw is used to replace the traditional tapered mandrel. Because the mandrel jaws have a uniform cross sectional area, the wire, for example, can be wrapped multiple times around the mandrel jaw when it is desired to produce multiples of the same shape. For added versatility, the pliers can have opposing mandrel jaws, with different size cross sectional area.

The present invention provides a mandrel tool and method for more efficiently and consistently forming various shapes of material. In one embodiment of the invention, a pair of pliers having mandrel jaws that are shaped with a uniform cross sectional area throughout a length of the mandrel jaw is used to replace the traditional tapered mandrel. Because the mandrel jaws have a uniform cross sectional area, the wire, for example, can be wrapped multiple times around the mandrel jaw when it is desired to produce multiples of the same shape. For added versatility, the pliers can have opposing mandrel jaws, with different size cross sectional area.

An accessory includes a body that has a first hole surrounded by a first inner surface, and a component that has a first hole surrounded by a first inner surface to be engaged with the first inner surface. A method of manufacturing the component includes: a piercing step of forming, by blanking, the second hole through a sheet-like member of which the component is formed; a first reshaping step of swelling the second inner surface into the second hole by compressing a rim portion surrounding the second hole; a shearing step of cutting the component out of the sheet-like member; and a second reshaping step of rounding a tip portion of the second inner surface having swelled by the first reshaping. The second reshaping step includes barreling the component cut out by the shearing.

An accessory includes a body that has a first hole surrounded by a first inner surface, and a component that has a first hole surrounded by a first inner surface to be engaged with the first inner surface. A method of manufacturing the component includes: a piercing step of forming, by blanking, the second hole through a sheet-like member of which the component is formed; a first reshaping step of swelling the second inner surface into the second hole by compressing a rim portion surrounding the second hole; a shearing step of cutting the component out of the sheet-like member; and a second reshaping step of rounding a tip portion of the second inner surface having swelled by the first reshaping. The second reshaping step includes barreling the component cut out by the shearing.

The present invention provides a mandrel tool and method for more efficiently and consistently forming various shapes of material. In one embodiment of the invention, a pair of pliers having mandrel jaws that are shaped with a uniform cross sectional area throughout a length of the mandrel jaw is used to replace the traditional tapered mandrel. Because the mandrel jaws have a uniform cross sectional area, the wire, for example, can be wrapped multiple times around the mandrel jaw when it is desired to produce multiples of the same shape. For added versatility, the pliers can have opposing mandrel jaws, with different size cross sectional area.

The present invention provides a mandrel tool and method for more efficiently and consistently forming various shapes of material. In one embodiment of the invention, a pair of pliers having mandrel jaws that are shaped with a uniform cross sectional area throughout a length of the mandrel jaw is used to replace the traditional tapered mandrel. Because the mandrel jaws have a uniform cross sectional area, the wire, for example, can be wrapped multiple times around the mandrel jaw when it is desired to produce multiples of the same shape. For added versatility, the pliers can have opposing mandrel jaws, with different size cross sectional area.