Corus Staal Bv

Willem Jan Van Veenen

Petrus Cornelis Jozef Beentjes

Hendrik Bastiaan Ras

Hendrikus Christianus Engelbertus Van Der Aa

Michiel Adrianus Henricus Van Der Aa

Process for the wall ironing of a product in sheet form, which is formed from a metal sheet coated on at least one side with a layer of plastic, the wall-ironing tool comprising a forming surface which the product with a plastic coating layer moves along during the wall ironing, and the forming surface being at an entry angle with respect to the direction of movement of the product, whereby the entry angle varies over the length of the forming surface, in the direction of movement of the product past the forming surface, this entry being smaller in a starting zone of the forming surface than in the subsequent zone thereof.

Process for the wall ironing of a product in sheet form, and a wall ironing tool

Method of coating a metallic substrate ( ) with thermoplastic coating material, comprising a preheating the substrate in such as way that, just prior to coating, it is at a temperature between 70&deg; C. and 150&deg; C., preferably between 100&deg; C. and 130&deg; C. in the case of a coating containing polypropene and between 80 and 110&deg; C. in the case of a coating containing polyethene; coextrusion, in the first coating station of a sheet ( ) comprising a polyolefin covering layer and a modified polyolefin adhesion layer; coating of the substrate ( ) with a molten sheet in the presence of ozone by pressing it with the adhesion layer against the surface of the substrate; transportation of the strip ( ) coated on one side to a second coating station and heating the strip so that, just before coating, the strip is at a temperature between 70&deg; C. and 130&deg; C., preferably between 80&deg; C. and 120&deg; C., if the coating layer applied in the first coating station is polypropene and between 80 and 110&deg; C. if the coating layer applied at that point is polyethene; coating of the substrate with a molten sheet extruded in the second coating station by pressing it against the uncoated surface of the substrate, use being made of the presence of ozone; heating of the coated substrate so that it assumes a temperature which is above the melting point of the polyolefins applied; cooling of the coated substrate.

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Beverwijk, Netherlands

Willem Jan Van Veenen