摘要:
A method of manufacturing a bottle can, wherein when the portion of a skirt part (7) positioned at least in the area of approximately 180° from the end portion (6a) of a male screw part (6) at the can axial lower end circumferentially in a direction opposite to a direction (X) in which the male screw part (6) is extended is molded, the inner surfaces of the mold predicted parts of the skirt part (7) for a first peripheral wall part and a projected curved surface part are pressed in the radial outer direction.
摘要:
A method for producing a screw-top bottle-can and a screw-top bottle-can is provided so that a thread-forming process can be operated without damaging an inner coating and a resealing operation is improved. A shoulder part is formed by reducing a diameter of an aperture part of a closed-end cylindrical body, a cylindrical part having an intermediate diameter between a major thread diameter and a minor thread diameter and a tapered part which is tapered from an upper end of the cylindrical part toward an open-end part are formed above the shoulder part, and performing a thread-forming process from the tapered part to the cylindrical part so as to form a starting part of the screw-thread at a middle part of the tapered part.
摘要:
To provide a variant-can having a narrow part in the vicinity of a bottom part by performing a diameter-reduction process up to the vicinity of the bottom part on a trunk part of a can-body made of metal in a can-manufacturing device which processes the can-body being held by a pocket-shaped conveying part while conveying. It is provided with: a can-body pocket which holds a can-body by being in contact with a part of an outer circumference surface of a trunk part of the can-body; a base pad which presses a bottom part of the can-body along a can-axis direction; a die in which the trunk part of the can-body is press-inserted; and a clamping ring which protrudes from the base pad toward the die and is provided so as to move back and forth along the can-axis direction, in which the can-body pocket has a plurality of holding surfaces being separated circumferentially from each other along the outer circumference surface, the clamping ring has a plurality of arc-shaped clamping surface being inserted and extracted between the holding surfaces, so that a clamping surface is formed to clamp the outer circumference surface around substantially whole circumference in the vicinity of the bottom part of the can-body by inserting the arc-shaped clamping surface of the clamping ring between the holding surfaces of the can-body pocket.
摘要:
To provide a variant-can by performing a diameter-reduction process up to the vicinity of a bottom part on a trunk part of a can-body made of metal. A diameter-reduction apparatus for can-trunk for performing a diameter-reduction process on a trunk part of a can-body having a closed-end cylindrical shape with an open end, including: a can-body holder holding a bottom part of the can-body, which is provided with: a base pad abutting on the bottom part of the can-boy; and a first clamping-ring having substantially a cylindrical shape which clamps an outer circumference surface of a trunk part of the can-body at the bottom side and which moves back and forth relative to the base pad along a can-axis direction; a die unit for diameter-reduction provided with a die for a diameter-reduction process of the trunk part by moving back and forth with respect to the can-body holder along the can-axis direction; and a first clamping-ring moving device moving the first clamping-ring backward along the can-axis direction along with an advance of the die.