Title:
METHOD FOR MANUFACTURING LAMINATABLE CONTAINER
Document Type and Number:
Japanese Patent JP2022061478
Kind Code:
A
Abstract:
To provide a method for efficiently manufacturing a laminatable bottomed cylindrical container made of aluminum or an aluminum alloy and used as a drinking or eating utensil, etc.SOLUTION: This method includes: executing a redrawing process for an object part 20a to be redrawn which is a part from a lower end to a prescribed height of 2/5 or less of a height of a machined container of a bottomed cylindrical body 20 without using a wrinkle pressing fixture; and executing a diameter expansion process for an object part 60 to be diameter-expanded which is a part from all parts excluding the object part 20a or an upper end to a position of a fixed height above the object part 20a of the bottomed cylindrical body 20. The diameter expansion process forms at least a predetermined range part of the object part 60 to be diameter-expanded in a height direction into a tapered shape reduced in inner and outer diameters toward a lower side.SELECTED DRAWING: Figure 7
Inventors:
MIZUNO TAKAFUMI
ONDA ATSUSHI
ONDA ATSUSHI
Application Number:
JP2021151817A
Publication Date:
April 18, 2022
Filing Date:
September 17, 2021
Export Citation:
Assignee:
KOBAYASHI KIKO CO LTD
International Classes:
B21D51/26
Attorney, Agent or Firm:
Takashi Takara