Coating processes – With pretreatment of the base – Metal base
Patent
1997-01-10
1998-11-03
Cameron, Erma
Coating processes
With pretreatment of the base
Metal base
280608, 148537, 427377, 4273881, B05D 312
Patent
active
058305351
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a process for producing a ski edge from rolled and heat-treated material, such ski edge being prepared for incorporation in a ski and at least partly coated on its surface with a bonding agent (primer).
According to the state of the art, for the manufacture of ski edges, a steel strip profile is rolled first, which profile is subsequently hardened and tempered, i.e., it is heat-treated. For the purpose of avoiding phenomena of corrosion due to oxidation (rust) during transport and storage of such ski edge strip profiles, which are commercially traded as semi-finished metal products, said strip profiles are coated with protective, anticorrosive oil. Prior to or after such coating, recesses and/or openings are punched in the flank of the strip profile, if need be.
As a rule, the ski edges are further processed by the ski manufacturer. There, the protective, anticorrosive oil serving as protection against corrosion is removed first. Subsequently, the ski edge strip profile is sandblasted in order to mechanically detach the oxide skins formed. Thereafter, the ski edge is coated with a bonding agent (primer), embedded in the plastic body of the ski, and bonded.
The requirements to be met by the durability of the connection between the edge of the ski and the body of the ski are very high. Particularly in connection with the so-called monoskis or snowboards, the edges of the ski are highly stressed because with said sport equipment, as opposed to conventional skis, one single ski edge must absorb all dynamic forces occurring when such equipment is used. With skis for competitive sport, the requirements to be met are similarly high. This condition has to be taken into account in the manufacture of the ski edge by applying the bonding agent to the ski edge strip profile under optimal conditions. It is absolutely necessary for said purpose that the steel strip profile is free of oxide to the greatest possible extent, and that the protective, anticorrosive oil is removed free of any residue. Usually, suitable solvents are used for the degreasing, and oxide skins or other corrosions are eliminated by sandblasting or the like.
An important drawback of said known process for the production of a ski edge lies in the fact that the ski edge strip material, which is supplied to the ski manufacturer as a semi-finished product, has to be prepared with relatively high production-technical expenditure before it is incorporated in the ski. The removal of layers of corrosion, i.e., of the oxide skin by means of sandblasting or the like, as well as the use of solvents for removing the anticorrosive oil both translate into a relatively high expenditure in terms of labor, time and cost. Furthermore, the use of solvents, which are chlorinated hydrocarbons, as a rule, is particularly harmful to the environment, both in view of the solvent vapors escaping during the manufacturing process , and in connection with the disposal of the solvent, the latter being contaminated with protective, anticorrosive oil.
From the above results the problem of the invention to further develop a process according to the introductory part of the main claim in a way such that the labor and cost expenditures in the manufacture of the ski edge as well as the load on the environment are reduced and a more solid bond of the ski edge with the body of the ski is made possible at the same time.
For solving said problem, the invention proposes that the ski edge strip material is, in a continuous work operation following the heat treatment, coated at least within the zone of the bonding surfaces with the bonding agent (primer), whereby the ski edge strip material is maintained under reducing conditions directly before coating in such a way that the surface of the strip material is free of oxide before the coating.
In the process according to the invention, the time- and labor-intensive mechanical removal of oxide skins is dispensed with completely. A further advantage results from the fact that the primer coating applied to the metallicall
REFERENCES:
patent: 4330574 (1982-05-01), Pierson et al.
patent: 4477285 (1984-10-01), Ault
patent: 5451276 (1995-09-01), Junius
Hofinghoff Heinz
Junius Hans-Toni
C. D. Walzholz Produktions--Gesellschaft mbH
Cameron Erma
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