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US 10,703,026 B2Granted
Method for producing cork stopper and cork stopper
AssigneeUchiyama Manufacturing Corp.
InventorsAkihiro Anabuki, Tatsuo Katayama, Tomohisa Yamamoto
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Abstract
An objective of the present invention is to provide a method for producing a cork stopper by compression molding cork grains, which can provide a cork stopper excellent in sealability and safety. There is provided a method for producing a cork stopper, comprising: mixing cork grains and an adhesive; compression molding the mixture to give an intermediate; and then heating the intermediate to expand the cork grains.
Claims14
A method for producing a cork stopper, comprising:
- mixing cork grains and an adhesive;
- compression molding the mixture to give an intermediate;
- placing the intermediate in a cavity of a mold;
- and
- then internally heating the intermediate to expand the cork grains, wherein the internally heating is microwave heating or high-frequency heating.
2 more elements
A method for producing a cork stopper, comprising:
- mixing cork grains and an adhesive;
- compression molding the mixture to give an intermediate;
- placing the intermediate in a cavity of a mold at 0 to 40° C. while keeping the intermediate at 80° C. or higher;
- and
- allowing the intermediate to stand to expand the cork grains;
- wherein
- the intermediate is approximately cylindrical with a diameter C (mm), the cavity is approximately cylindrical with a diameter D (mm), and C and D satisfy the following formula (2):
- 1.01≤D/C≤1.2 (2).
5 more elements
Dependencies are inferred from the claim text.