FORMING METHOD OF HEAT INSULATION FILM

• Main Author: YAMASHITA HIDEO
• Format: Patent
• Language: English; Japanese
• Published: 08.03.2018
• Subjects: ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES; BLASTING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES; CYLINDERS; CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ENGINE PLANTS IN GENERAL; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; PISTONS; SEALINGS; STEAM ENGINES; THERMAL INSULATION IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide a forming method which can improve the heat resistance of a sealed film which is formed on an apex face of an anode oxide film.SOLUTION: A sealing treatment is performed for enhancing the heat insulation performance of an anode oxide film 10 by at least blocking an opening part 12a of an opened blow hole 12. In a first step of the sealing treatment, a solventless sealer (first sealer) is used, and a first silicone oxide film 16 is formed. In a second step of the sealing treatment, a solvent sealer (second sealer) is used, and a second silicone oxide film 18 is formed. An inorganic polymer constituting the second silicone oxide film 18 is higher in melting temperature than an inorganic polymer constituting the first silicone oxide film 16, and sufficiently high in hardness. Actual machine durability can be thereby sufficiently obtained.SELECTED DRAWING: Figure 1 【課題】陽極酸化膜の頂面に形成される封孔膜の耐熱性を向上できる製造方法を提供する。【解決手段】封孔処理は、開気孔１２の開口部１２ａを少なくとも塞いで、陽極酸化膜１０の遮熱性を高めるために行われる。封孔処理の第１ステップでは、無溶剤タイプの封孔剤（第１封孔剤）が使用され、第１シリコン系酸化膜１６が形成される。封孔処理の第２ステップでは、溶剤タイプの封孔剤（第２封孔剤）が使用され、第２シリコン系酸化膜１８が形成される。第２シリコン系酸化膜１８を構成する無機系ポリマーは、第１シリコン系酸化膜１６を構成する無機系ポリマーに比べて融解温度が高く、また、硬度も十分に高い。従って、実機耐久性が十分な遮熱膜を得ることができる。【選択図】図１