{
  "$type": "site.standard.document",
  "description": "[Problem to be Solved] The present invention provides a piston for an internal combustion engine in which an anodized film is formed on a piston crown surface, the anodized film having low thermal conductivity and volume specific heat capacity, excellent durability, and the ability to suppress heat…",
  "path": "/patents/1403473",
  "publishedAt": "2024-02-14T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "C25D11/022",
    "SUZUKI MOTOR CORP [JP]"
  ],
  "textContent": "[Problem to be Solved] The present invention provides a piston for an internal combustion engine in which an anodized film is formed on a piston crown surface, the anodized film having low thermal conductivity and volume specific heat capacity, excellent durability, and the ability to suppress heat retention even during a continuous run of an internal combustion engine. The present invention also provides a method for manufacturing the piston. [0002] [Solution] The method for manufacturing a piston for an internal combustion engine according to the present invention includes: irradiating a piston crown surface 2 of a piston body made of aluminum alloy with laser light to form a recess 10; and forming an anodized film 20 on the piston crown surface 2 by applying an AC/DC superposed voltage to close an opening 13 of the recess 10. The piston for an internal combustion engine according to the present invention has a plurality of the recesses 10 in the piston crown surface 2, of which the openings are closed with the anodized film 25, and has a hollow space 26 closed with the anodized film 20 inside each of the plurality of recesses 10.",
  "title": "PISTON FOR INTERNAL COMBUSTION ENGINE AND METHOD FOR MANUFACTURING THE SAME"
}