Method for manufacturing laminatable container

JP2025160513A5Pending Publication Date: 2025-12-19小林機工株式会社
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Patent Information

Application Number
JP2025134695
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2020-10-06
Filing Date
2025-08-13
Publication Date
2025-12-19

AI Technical Summary

Technical Problem

Existing methods for producing bottle-shaped aluminum cans result in defects due to material distortion and diameter reduction, leading to cracks and noticeable surface stains, which lowers the production yield and requires recycling as scrap metal.

Method used

A method for manufacturing stackable cylindrical containers involves a redrawing process without a blank holder tool on a predetermined portion of the bottomed cylindrical body, followed by a diameter expansion process to form a tapered shape, and subsequent folding to create stable, stackable aluminum or aluminum alloy containers.

Benefits of technology

This method enables the efficient production of stackable cylindrical containers with reduced defects, allowing for stable stacking and utilization of recycled or discarded aluminum cans, improving production efficiency and reducing material waste.

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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
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