Kanthal Ab

Lars-Goran Johansson

Mats Sundberg

Jan Andersson

Helena Johansson

An arrangement at installation of electrical resistance elements having high operating temperatures, in which arrangement comprises at least one element having a glow zone () and support and distance plates () to carry the glow zone. The element is corrugated in its lengthwise direction, that the upper corrugations are supported at the tipper edges of vertical supporting plates () and that the lower corrugations are supported at distance plates () that are arranged between each two adjacent supporting plates (). The supporting plates () and the distance plates () are held together by a resilient mounted pull bar (). The element or the elements are mainly made from molybdenum disilicide.

Horizontal element arrangement means

The present invention is for a method for heating of blanks and other heating of metallic materials in a furnace before working where heat is transferred to a blank in the furnace by radiation. According to the method of the invention an important part of the radiation hits the walls of the furnace and are reflected there before it is transferred to the blank. Preferably the furnace is designed so that head radiation is reflected also at the bottom of the furnace. At least 50% of the radiation which reaches the blank ought to be reflected radiation. The invention is also for a furnace for heating of blanks and other comprising at least one furnace bottom part ( ) and at least one furnace top part ( ) having side walls ( ) where at least parts of the side walls of the top parts are inclined so that opposite walls are inclined towards each other.

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Hallstahammar, Sweden

Lars-Goran Johansson