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EP-4738989-A1 - HEATING DEVICE AND METHOD FOR PRODUCING CAN BODY

EP4738989A1EP 4738989 A1EP4738989 A1EP 4738989A1EP-4738989-A1

Abstract

There is provided a heating device heating a can body with hot air, the heating device including a heating unit configured to generate the hot air, a first heating portion configured to heat the can body to raise a temperature of the can body with the hot air, and a second heating portion configured to heat the can body that has been heated to the raised temperature. At least one of the first heating portion or the second heating portion may include a plurality of heating sections having different heating conditions of the can body.

Inventors

  • TANAKA, HIROKI
  • ISHIGURO, Hideki

Assignees

  • Toyo Seikan Co., Ltd.

Dates

Publication Date
20260506
Application Date
20240509

Claims (18)

  1. A heating device heating a can body with hot air, the heating device comprising: a heating unit configured to generate the hot air; a first heating portion configured to heat the can body to raise a temperature of the can body with the hot air; and a second heating portion configured to heat the can body that has been heated to the raised temperature, wherein at least one of the first heating portion or the second heating portion includes a plurality of heating sections having different heating conditions of the can body.
  2. The heating device according to claim 1, wherein the second heating portion heats the can body that has been heated to the raised temperature and maintains a predetermined temperature.
  3. The heating device according to claim 1, wherein the heating unit is an electric heater configured to generate the hot air.
  4. The heating device according to claim 1, comprising: a plurality of the heating units configured to generate the hot air, wherein at least one heating unit of the plurality of heating units is provided in each of the plurality of heating sections.
  5. The heating device according to claim 1, wherein two or more of the heating units are provided in at least one heating section of the plurality of heating sections.
  6. The heating device according to claim 1, wherein a temperature of at least one heating section of the plurality of heating sections of the first heating portion is higher than a temperature of a heating section of the second heating portion.
  7. The heating device according to claim 1, wherein an amount of air supplied from the heating unit in the first heating portion is larger than an amount of air supplied from the heating unit in the second heating portion.
  8. The heating device according to claim 1, comprising: a plurality of exhaust portions provided to correspond to the plurality of heating sections and configured to exhaust the hot air, wherein for each of the plurality of heating sections in which the plurality of exhaust portions are provided, a corresponding one of the plurality of exhaust portions adjusts an exhaust amount.
  9. The heating device according to claim 8, wherein the exhaust amount of a last heating section of the plurality of heating sections of the first heating portion is larger than the exhaust amount of a first heating section of the plurality of heating sections of the first heating portion.
  10. The heating device according to claim 8, wherein the exhaust amount of a first heating section of the plurality of heating sections of the second heating portion is larger than the exhaust amount of a last heating section of the plurality of heating sections of the second heating portion.
  11. The heating device according to any one of claims 1 to 10, wherein each of the plurality of heating sections includes a circulation path configured to recover the hot air that has heated the can body, reheat the hot air using the heating unit, and circulate the hot air.
  12. The heating device according to any one of claims 1 to 10, wherein at least one heating section of the plurality of heating sections includes a circulation path configured to reheat the hot air using the heating unit and circulate the hot air without exhausting the hot air that has heated the can body.
  13. The heating device according to any one of claims 1 to 10, wherein at least one heating section of the plurality of heating sections includes a removal device configured to remove a volatile component from the can body.
  14. The heating device according to claim 13, wherein the removal device is provided in a first heating section of the plurality of heating sections of the second heating portion.
  15. The heating device according to any one of claims 1 to 10, comprising: a cooling portion provided in a subsequent stage of the second heating portion and configured to cool the can body.
  16. The heating device according to any one of claims 1 to 10, wherein at least one heating section of the plurality of heating sections of the first heating portion and/or at least one heating section of the plurality of heating sections of the second heating portion is capable of being assembled separately from other heating sections.
  17. A method of manufacturing a can body, the method comprising: generating hot air heating the can body; heating, by a first heating portion, the can body to raise a temperature of the can body with the hot air; and heating, by a second heating portion, the can body that has been heated to the raised temperature, wherein at least one of the first heating portion or the second heating portion includes a plurality of heating sections having different heating conditions of the can body.
  18. The method of manufacturing the can body according to claim 17, the method comprising: forming the can body from a metal plate coated with resin, wherein the first heating portion and the second heating portion heat a resin-coated can obtained by coating the can body with resin.

Description

Technical Field The present invention relates to a heating device and a manufacturing method of a can body. Background Art Non-Patent Document 1 discloses "a DI can dryer oven using a clean heating source". Citation List Non-Patent Literature Non-Patent Document 1: JP 07-032487 UM-A General Disclosure Technical Problem A can body heating device excellent in energy efficiency is provided. Solution to Problem In a first aspect of the present invention, there is provided a heating device heating a can body with hot air, the heating device including a heating unit configured to generate the hot air, a first heating portion configured to heat the can body to raise a temperature of the can body with the hot air, and a second heating portion configured to heat the can body that has been heated to the raised temperature. At least one of the first heating portion or the second heating portion may include a plurality of heating sections having different heating conditions of the can body. In the heating device, the second heating portion may heat the can body that has been heated to the raised temperature and maintain a predetermined temperature. In any of the heating devices described above, the heating unit may be an electric heater configured to generate the hot air. In any of the heating devices described above, the heating device may include a plurality of the heating units configured to generate the hot air. At least one heating unit of the plurality of heating units may be provided in each of the plurality of heating sections. In any of the heating devices described above, two or more of the heating units may be provided in at least one heating section of the plurality of heating sections. In any of the heating devices described above, a temperature of at least one heating section of the plurality of heating sections of the first heating portion may be higher than a temperature of a heating section of the second heating portion. In any of the heating devices described above, an amount of air supplied from the heating unit in the first heating portion may be larger than an amount of air supplied from the heating unit in the second heating portion. Any of the heating devices described above may include a plurality of exhaust portions provided to correspond to the plurality of heating sections and configured to exhaust the hot air. For each of the plurality of heating sections in which the plurality of exhaust portions are provided, a corresponding one of the plurality of exhaust portions may adjust an exhaust amount. In any of the heating devices described above, the exhaust amount of a last heating section of the plurality of heating sections of the first heating portion may be larger than the exhaust amount of a first heating section of the plurality of heating sections of the first heating portion. In any of the heating devices described above, the exhaust amount of a first heating section of the plurality of heating sections of the second heating portion may be larger than the exhaust amount of a last heating section of the plurality of heating sections of the second heating portion. In any of the heating devices described above, each of the plurality of heating sections may include a circulation path configured to recover the hot air that has heated the can body, reheat the hot air using the heating unit, and circulate the hot air. In any of the heating devices described above, at least one heating section of the plurality of heating sections may include a circulation path configured to reheat the hot air using the heating unit and circulate the hot air without exhausting the hot air that has heated the can body. In any of the heating devices described above, at least one heating section of the plurality of heating sections may include a removal device configured to remove a volatile component from the can body. In any of the heating devices described above, the removal device may be provided in a first heating section of the plurality of heating sections of the second heating portion. Any of the above-described heating devices may include a cooling portion provided in a subsequent stage of the second heating portion and configured to cool the can body. In any of the heating devices described above, at least one heating section of the plurality of heating sections of the first heating portion and/or at least one heating section of the plurality of heating sections of the second heating portion may be capable of being assembled separately from other heating sections. According to a second aspect of the present invention, there is provided a method of manufacturing a can body, the method including generating hot air heating the can body, heating, by a first heating portion, the can body to raise a temperature of the can body with the hot air, and heating, by a second heating portion, the can body that has been heated to the raised temperature. At least one of the first heating portion or the second heating po