Method of producing an electrostatically painted multi-layered hose

A method of producing a multi-layered hose comprising:

• forming a tubular outer layer having at least one edge opening,
• inserting a tubular cap into said at least one edge opening of said outer layer,
• painting a resin inner layer on an inner surface of said outer layer while said tubular cap is in place, and
• removing said cap from said at least one edge opening after said painting.

A method of producing a multi-layered hose comprising:

• forming a tubular outer layer,
• forming at least one intermediate layer on an inner surface of said outer layer, said at least one intermediate layer containing at least one of metal powder, electric conductors and magnetic substance powder,
• painting a resin inner layer on said at least one intermediate layer, said resin inner layer containing none of metal powder, electric conductors, and magnetic substance powder, and
• heating said resin inner layer by dielectric heating.

A method of producing a multi-layered hose comprising:

• forming a tubular outer layer,
• forming at least one intermediate layer on an inner surface of said outer layer, said at least one intermediate layer containing a dielectric substance,
• painting a resin inner layer on said at least one intermediate layer, said resin inner layer containing no dielectric substance, and
• heating said resin inner layer by dielectric heating.

A method of producing a multi-layered hose comprising:

• forming a tubular outer layer of a rubber material having edge openings on both longitudinal ends thereof,
• inserting a tubular cap into at least one edge opening of at least one longitudinal end of said outer layer,
• forming an inner layer on an inner surface of said outer layer by electrostatically painting resin on said inner surface of said outer layer with said cap on,
• conducting said electrostatic painting by charging said resin with one of positive electricity and negative electricity and charging said outer layer with the other of positive electricity and negative electricity,
• heating said electrostatically painted resin on said inner surface of said outer layer,
• cooling said electrostatically painted resin, and
• removing said cap from said edge opening after said electrostatic painting.

A method of producing a multi-layered hose comprising:

• forming a tubular outer layer of a rubber material,
• forming at least one intermediate layer on an interior surface of said outer layer,
• forming an inner layer adjacent to said at least one intermediate layer by electrostatically painting resin on said at least one intermediate layer,
• said at least one intermediate layer containing at least one of metal powder, electric conductors, and magnetic substance powder, and said resin inner layer adjacent to said at least one intermediate layer containing none of metal powder, electric conductors, and magnetic substance powder,
• conducting said electrostatic painting by charging said resin with one of positive electricity and negative electricity and charging said outer layer with the other of positive electricity and negative electricity,
• heating said electrostatically painted resin adjacent to said at least one intermediate layer by dielectric heating, and
• cooling said electrostatically painted resin.

A method of producing a multi-layered hose comprising:

• forming a tubular outer layer of a rubber material,
• forming at least one intermediate layer on an interior surface of said outer layer,
• forming an inner layer adjacent to said at least one intermediate layer by electrostatically painting resin on said at least one intermediate layer,
• said at least one intermediate layer containing dielectric substance, and said resin inner layer adjacent to said at least one intermediate layer containing no dielectric substance,
• conducting said electrostatic painting by charging said resin with one of positive electricity and negative electricity and charging said outer layer with the other of positive electricity and negative electricity,
• heating said electrostatically painted resin adjacent to said at least one intermediate layer by dielectric heating, and
• cooling said electrostatically painted resin.

A method of producing a multi-layered hose comprising:

• forming a tubular outer layer of rubber material including a body portion and edge portions which are respectively connected to both ends of said body portion and are to be connected to mating pipes,
• forming an inner layer on an inner surface of said outer layer by electrostatically painting resin on said inner surface of said outer layer, a thickness of said resin inner layer at said edge portions being smaller than the thickness of said resin inner layer at said body portion of said outer layer,
• conducting said electrostatic painting by charging said resin with one of positive electricity and negative electricity and charging said outer layer with the other of positive electricity and negative electricity,
• heating said electrostatically painted resin on said inner surface of said outer layer, and
• cooling said electrostatically painted resin.

A method of producing a multi-layered hose comprising:

• forming a tubular outer layer of rubber material including a body portion and edge portions which are respectively connected to both ends of said body portion and are to be connected to mating pipes,
• forming an inner layer on an inner surface of said outer layer by electrostatically painting resin on said inner surface of said outer layer, said resin inner layer being electrostatically painted only on the inner surface of said body portion of said outer layer, and not on the inner surface of said edge portions of said outer layer,
• conducting said electrostatic painting by charging said resin with one of positive electricity and negative electricity and charging said outer layer with the other of positive electricity and negative electricity,
• heating said electrostatically painted resin on said inner surface of said outer layer, and
• cooling said electrostatically painted resin.