TH40101B - A method for forming the corrosion protection double coatings on the prestressed steel wire. And stranded steel wire produced by that method - Google Patents

Abstract

DC60 aims to improve tensile strength without compromising flexibility and adhesion to concrete, and to form a thick surface layer to protect the base material from exposure due to coating damage. The dual coating formation method on prestressed steel wire involves a primary painting process after pretreatment, where the resin coating is formed only on the surface; a secondary painting process where specific resin coatings are sequentially formed on the outer faces of each core and surrounding wire under relaxed and separated conditions, thus forming a dual coating on each surrounding wire; and a final process of re-twisting and re-twisting the surrounding wires back to their initial state. The resulting prestressed steel wire has a dual coating only on the surface and possesses sufficient flexibility and adhesion to concrete to improve tensile strength without compromising flexibility and adhesion, and to form a thick surface layer to protect the base material from exposure due to coating damage. The method of forming a double coating on prestressed steel wire involves a primary painting process following pre-treatment, where a resin coating is formed only on the surface layer; a secondary painting process where individual resin coatings are formed on the outer surface of each core and surrounding wire under relaxed and separated conditions, thus forming a double coating on each surrounding wire; and a finishing process of re-twisting and re-twiring the surrounding wire back to its original state. The resulting prestressed steel wire has a double coating only on the surface layer and possesses sufficient flexibility and adhesion to concrete.

Claims (5)

1. Method for forming the corrosion protection double coatings on prestressed steel wire consists of: pre-manipulation process of unscrewing, prestressed stranded wire and enclosing from core wire. And the act of preparing the surfaces of those wires; The initial paint process of straining and re-twisting of the enclosed wire surrounds the core wire, synthetic resin powder painting with the surface layer except the spiral grooves due to re-twisting, hot paint for adhesion. , And cooling, thus forming a specific resin coating in the substrate layer Only that; The secondary painting process of the enveloping of the stranded steel wire extruded from the core wire, the preservation of the core wire and the enclosed wire under the loosened condition by the core wire adjustment device, the synthetic resin powder painting with The periphery of each wire of the core wire and the surrounding wire, coloring heating for uniform adhesion. , And cooling, thus forming a specific resin coating layer Each layer part, which contains a section with a double enamel in the surrounding wire, and the finishing process of straining and re-twisting of the enclosed wire surrounds the core wire to its initial state in such a way that each layer section. The double glazing has been positioned in the substrate layer. Of prestressed steel wire 2. Method for claim 1, where the next step of the floor removal process is provided. Coat excess resin that forms in the spiral groove after the initial painting process. 3. Method according to claim 1, where the core wire adjustment device collects and adjusts the excess core wire. Automatically at all times during the finishing process. After the resin coating layer, specific condition Has been formed into the core and enclosed wire. By the second painting process, and will make the wire The core maintains constant tension during which the enclosing wire is re-twisted. 4. Prestressed stranded steel wire where each individual layer of the resin coat is formed. In the periphery of each strand of the core wire and the surrounding wire of the prestressed stranded wire and which is formed by twisting, the strand is enclosed around the core wire, where each strand of the wire surrounds a layer. Double coating only on the surface layer under the twisted condition. 5. Prestressed steel wire according to claim 4, where it is possible to loosen the twisting. The enclosed wire spiral is compared to the core wire, and in addition, the enclosed wire that is loosened can It has been re-twisted to its original twisting state.