Back to results
US 7,846,367 B2Granted
Sheet or film-forming roll, sheet or film-forming apparatus and crowning control method
AssigneeToshiba Kikai Kabushiki Kaisha
InventorsTakayoshi Sano, Akihiro Iwata
Life of this patent
Estimating the term…
Abstract
A sheet or film-forming roll has an inner cylindrical member and an elastic outer cylindrical member. The inner cylindrical member has a pressure chamber therein. As the inner cylindrical member becomes deformed (crowing change) depending on a pressure value of incompressible fluid led to the pressure chamber, the elastic outer cylindrical member becomes deformed (crowing change) too.
Claims8
A sheet or film-forming roll, comprising:
- an inner cylindrical member including an elastic cylindrical body having:
- a pressure chamber in the elastic cylindrical body, the pressure chamber being arranged to have a hermetically closed structure;
- and
- a shaft portion having a first passage that leads incompressible fluid to the pressure chamber;
- and
- an elastic outer cylindrical member arranged eccentrically to the inner cylindrical member so that an inner circumferential surface of the elastic outer cylindrical member comes into contact with an outer circumferential surface of the elastic cylindrical body, the elastic outer cylindrical member being provided with a thin-walled structure and made from metal.
3 more elements
A crowning control method of a sheet or film-forming roll, comprising a sheet or film-forming roll including:
- an inner cylindrical member including an elastic cylindrical body having:
- a pressure chamber in the elastic cylindrical body, the pressure chamber being arranged to have a hermetically closed structure;
- and
- a shaft portion having a first passage that leads incompressible fluid to the pressure chamber;
- and
- an elastic outer cylindrical member arranged eccentrically to the inner cylindrical member so that an inner circumferential surface of the elastic outer cylindrical member comes into contact with an outer circumferential surface of the elastic cylindrical body, the elastic outer cylindrical member being provided with a thin-walled structure and made from metal, the crowning control method comprising:
- giving a pressure to the incompressible fluid led to the pressure chamber via the first passage;
- measuring the pressure given to the incompressible fluid;
- calculating a target value of pressure to be given to the incompressible fluid to give an amount of crowning to be given to the outer cylindrical member;
- and
- reducing the pressure given to the incompressible fluid close to the target value.
8 more elements
A sheet or film-forming apparatus, comprising:
- a sheet or film-forming roll including:
- an inner cylindrical member including an elastic cylindrical body having:
- a pressure chamber in the elastic cylindrical body, the pressure chamber being arranged to have a hermetically closed structure;
- and
- a shaft portion having a first passage that leads incompressible fluid to the pressure chamber;
- and
- an elastic outer cylindrical member arranged eccentrically to the inner cylindrical member so that an inner circumferential surface of the elastic outer cylindrical member comes into contact with an outer circumferential surface of the elastic cylindrical body, the elastic outer cylindrical member being provided with a thin-walled structure and made from metal;
- a hydraulic source that gives a pressure to the incompressible fluid led to the pressure chamber via the first passage;
- a pressure sensor that measures the pressure given to the incompressible fluid;
- a crowning controller that calculates a target value of pressure to be given to the incompressible fluid to give an amount of crowning to be given to the outer cylindrical member;
- and
- a pressure controller that reduces the pressure given to the incompressible fluid close to the target value.
9 more elements
Dependencies are inferred from the claim text.