Ntn Corporation

Akihiro Oomori

Satoru Fukuzawa

Takuya Ishii

Hirohisa Abe

The present invention provides a method for producing a durable semispherical shoe which can be prevented from being subjected to seizure even in a dry lubrication state in which there is no lubricating oil at a start time of an operation of a swash plate compressor, can be restrained from deteriorating in its lubricating property due to generated frictional heat, and can be restrained from deteriorating in its strength at a production time and an injection molding die. A semispherical shoe (), for a swash plate compressor, to be produced by the production method has a base material (), consisting of a hard material, which has a hollow part along a central axis thereof and a resin layer, consisting of a resin composition, which is formed on a surface of a planar part, disposed on a periphery of the base member, which is to be subjected to sliding contact with the swash plate and on a surface of a spherical part, disposed on the periphery thereof, which is to be subjected to sliding contact with a piston. A resin-filled portion () where the resin composition is filled and an empty portion where the resin composition is not filled are formed in the hollow part of the base material. The resin-filled portion () and the resin layer are formed by injecting and filling the resin composition into a portion to be formed as the resin-filled portion () with the base material () being disposed inside a cavity () of the injection molding die.

Method for producing semispherical shoe for swash plate compressor and injection molding die

A swash plate compressor in which a lubricating film is not formed on a sliding contact surface of the swash plate and the piston owing to the use of the semispherical shoe. The semispherical shoe () is subjected to sliding contact with the swash plate of the swash plate compressor and the piston thereof. A base material () consists of a metallic member having a resin layer () formed on a surface of a planar part () that is subjected to sliding contact with the swash plate. A resin layer () is formed on a surface of a spherical part () to be subjected to sliding contact with the piston. The resin layer () and the resin layer () are integral with each other. At least one portion of the base material () is exposed.

Semispherical shoe for swash plate compressor and swash plate compressor

It is an object of the present invention to provide a semispherical shoe which can be prevented from being subjected to seizure even in a dry lubrication state in which there is no lubricating oil at the start time of an operation, does not deteriorate in its lubricating property owing to frictional heating, and ensures sufficient durability and a swash plate compressor in which a lubricating film is not formed on a sliding contact surface of a swash plate owing to the use of the semispherical shoe. A semispherical shoe () makes sliding contact with the swash plate of the swash plate compressor. A surface of a planar part () which makes sliding contact with the swash plate consists of a resin layer (). A surface of a spherical part () consists of a base material of the semispherical shoe. In viewing the surface of the planar part divided into three parts consisting of a central part (), an outer edge part (), and an intermediate part () interposed between the central part () and the outer edge part () in a direction vertical to the surface of the planar part, an annular belt portion () whose layer thickness is larger than that of each of the central part () and the outer edge part () is formed inside the intermediate part ().

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Mie, Japan

Akihiro Oomori