Heating equipment for a plate to be heated and heating method

1. A heating equipment for plate material to be heated, wherein

a contact-heating surface or surfaces is/are configured by arranging a plurality of heating elements at predetermined intervals, in a planar fashion and in a predetermined pattern on a base plate having a heat-insulating property, and the contact-heating surface(s) is/are directly contacted with the plate material to be heated for heating thereof;

wherein the heating element is rod-shaped or strip-shaped with a rectangular section, or rod-shaped with a circular or ellipsoidal section; and

wherein a surface of the heating element contacting with the plate material to be heated has a convex curved surface along the whole length of the heating element in a case where the heating element has a rectangular section.

2. A heating equipment for plate material to be heated, wherein

a contact-heating surface or surfaces is/are configured by arranging a plurality of heating elements at predetermined intervals, in a planar fashion and in a predetermined pattern on a base plate having a heat-insulating property, and the contact-heating surface(s) is/are directly contacted with the plate material to be heated for heating thereof; and

wherein insulation members are provided between the plurality of heating elements, the insulation member having elasticity or capability of changing position thereof in an orthogonal direction relative to the contact-heating surface.

3. A heating equipment for plate material to be heated, wherein

a contact-heating surface or surfaces is/are configured by arranging a plurality of heating elements at predetermined intervals, in a planar fashion and in a predetermined pattern on a base plate having a heat-insulating property, and the contact-heating surface(s) is/are directly contacted with the plate material to be heated for heating thereof; and

wherein a plurality of the base plates, each having a heat-insulating property and configuring the contact-heating surface(s) by arranging the plurality of heating elements, is arranged on both sides of the plate material to be heated and the plate material is sandwiched by the base plates to make a direct contact with the contact-heating surface of the heating elements for heating the plate material.

4. The heating equipment according to claim 3 , wherein the base plate is configured by a plurality of units comprising a plurality of the heating elements.

5. The heating equipment according to claim 4 , wherein heating abilities of the plurality of heating elements can be controlled for every heating element or every unit, and can be determined in a desired heating pattern.

6. The heating equipment according to claim 3 , wherein the base plate comprises ceramics.

7. A heating equipment for plate material to be heated, wherein

a contact-heating surface or surfaces is/are configured by arranging a plurality of heating elements at predetermined intervals, in a planar fashion and in a predetermined pattern on a base plate having a heat-insulating property, and the contact-heating surface(s) is/are directly contacted with the plate material to be heated for heating thereof;

wherein a plurality of the base plates, each having a heat-insulating property and configuring the contact-heating surface(s) by arranging the plurality of heating elements, is arranged on both sides of the plate material to be heated and the plate material is sandwiched by the base plates to make a direct contact with the contact-heating surface of the heating elements for heating the plate material; and

wherein the plurality of heating elements arranged on both sides of the plate material to be heated are arranged alternately on both sides and such that orthogonal projections of the heating elements on both sides on a plane parallel to the base plates overlap partially each other.

8. A heating equipment for plate material to be heated, wherein

a contact-heating surface or surfaces is/are configured by arranging a plurality of heating elements at predetermined intervals, in a planar fashion and in a predetermined pattern on a base plate having a heat-insulating property, and the contact-heating surface(s) is/are directly contacted with the plate material to be heated for heating thereof;

wherein a plurality of the base plates, each having a heat-insulating property and configuring the contact-heating surface(s) by arranging the plurality of heating elements, is arranged on both sides of the plate material to be heated and the plate material is sandwiched by the base plates to make a direct contact with the contact-heating surface of the heating elements for heating the plate material;

wherein the plurality of heating elements arranged on both sides of the plate material to be heated are arranged alternately on both sides and such that orthogonal projections of the heating elements on both sides on a plane parallel to the base plates overlap partially each other; and

wherein the heating elements are arranged such that, in a case where the heating elements on the base plates on both sides are contacted with each other without the plate material to be heated, a contacting point corresponds to a cross point of convex curved surface portions and a line connecting both curvature centers of convex curved surface portions of both of the heating elements near the contacting point.

9. A heating method for a plate material to be heated, comprising:

configuring a contact-heating surface by arranging a plurality of heating elements at predetermined intervals, in a planar fashion and in a predetermined pattern on a base plate having a heat-insulating property, and the contact-heating surface is directly contacted with the plate material to be heated for heating thereof, and

providing a plurality of the base plates, each having a heat-insulating property and configuring the contact-heating surface by arranging the plurality of heating elements, on both sides of the plate material to be heated and sandwiching the plate material between the base plates to make a direct contact with the contact-heating surface or surfaces of the heating elements for heating the plate material.

10. The method for producing a press-formed material, comprising heating by using the heating method according to claim 9 .

11. A heating method for a plate material to be heated, comprising:

configuring a contact-heating surface by arranging a plurality of heating elements at predetermined intervals, in a planar fashion and in a predetermined pattern on a base plate having a heat-insulating property, wherein a surface of the heating element contacting with the plate material to be heated has a convex curved surface along the whole length of the heating element in a case where the heating element has a rectangular section; and

providing the base plates on both sides of the plate material to be heated and sandwiching the plate material to make a direct contact with the contact-heating surface or surfaces of the heating elements for heating the plate material.

12. The method for producing a press-formed material, comprising heating by using the heating method according to claim 11 .

13. A heating method for a plate material to be heated, comprising:

configuring a contact-heating surface by arranging a plurality of heating elements at predetermined intervals, in a planar fashion and in a predetermined pattern on a base plate having a heat-insulating property;

providing insulation members between the plurality of heating elements, the insulation member having elasticity or capability of changing position thereof in an orthogonal direction relative to the contact-heating surface; and

providing the base plates on both sides of the plate material to be heated and sandwiching the plate material to make a direct contact with the contact-heating surface or surfaces of the heating elements for heating the plate material.

14. The method for producing a press-formed material, comprising heating by using the heating material according to claim 13 .