Method of applying decorative layers to a steel shaft
View Patent ↗A method of applying decorative layers to a steel golf club shaft is disclosed. The method may be performed on any type of steel shaft and comprises buffing the steel shaft, applying a primer or sealer coat, curing the sealer coat, buffing the sealer coat, applying a decal or decorative layer, applying clear coat over the shaft and decal, and curing the clear coat layer. Some embodiments comprise applying a layer of base coat color before applying a decal. Disclosed methods can, for example, improve adhesion between chrome-plated steel golf club shafts and paint, for golf club branding with increased resistance to wear.
1. A method, comprising:
providing a steel shaft;
buffing at least a portion of an exterior surface of the steel shaft to provide a roughened surface area;
applying a primer layer to at least a portion of the roughened surface area;
applying a decal to a portion of the primer layer situated at the roughened surface area, wherein the entire decal overlies both at least part of the primer layer and at least part of the roughened surface area; and
applying a clear coat layer to at least a portion of the decal.
2. The method of claim 1 , wherein at least a portion of the exterior surface of the steel shaft is defined by a metallic protective layer applied to the steel shaft.
3. The method of claim 2 , wherein the metallic protective layer is a chrome layer, a nickel chrome layer, a nickel layer, or a combination thereof.
4. The method of claim 3 , wherein buffing the steel shaft comprises removing at least some of the metallic protective layer.
5. The method of claim 4 , wherein the decal is a heat transfer decal that is applied by pressing the decal against the primer layer at a temperature of at least 75° C.
6. The method of claim 5 , further comprising buffing the primer layer before applying the heat transfer decal.
7. The method of claim 6 , wherein the heat transfer decal wraps substantially around the circumference of the steel shaft.
8. The method of claim 7 , wherein the heat transfer decal is applied by pressing the heat transfer decal against the primer layer with at least two metal rollers.
9. The method of claim 7 , further comprising applying a colored base coat layer to at least a portion of the primer layer before applying the heat transfer decal.
10. The method of claim 9 , further comprising applying a clear coat layer to the heat transfer decal.
11. The method of claim 10 , wherein the colored based coat extends along the length of the steel shaft from about a grip end to a club head end, and the heat transfer decal is applied so as to be adjacent a grip portion of the steel shaft.