1. Field of the Invention
The present invention relates to a method for producing a colorful sole, and more particularly to a method to form a colorful sole can have complicated patterns or patterns having gradually changing colors to allow the sole to have versatile appearances.
2. Description of Related Art
Conventional methods for producing a sole include techniques such as injection molding, compression molding, casting and die-casting. All the conventional methods require pouring molding composition into molds to form the molding composition into the shape of a sole. When producing a colorful sole, manufacturers have to pour molding compositions in different colors into the mold several times and wait until the previous colored molding composition has solidified. With such a process, the colorful sole has a simple pattern with clear demarcation between the different colors. However, the appearance of the colorful sole is monotonous because the molding compositions are not easily controlled in the mold to show a regular and complicated pattern at precise positions on the sole. Even though the boundary of the pattern on the conventional colorful sole is distinct, gradually changed color patterns cannot be achieved on the colorful sole by the conventional methods. Therefore, pattern designs on the colorful sole are limited and cannot enhance the attraction of the colorful sole.
To overcome the drawbacks of the conventional methods for producing colorful soles, adhesive paper with colorful patterns is bonded to the sole, or a colorful pattern is painted with paint on the outer periphery of the sole. However, the adhesive paper easily detaches when the adhesive deteriorates, and the paint easily fades after washing. Therefore, the colorful sole with adhesive paper or patterns painted with paint do not ensure that the patterns stay on the sole for a long time.
To overcome the shortcomings, the present invention provides a method for making a colorful sole to mitigate and obviate the aforementioned problems.
The main objective of the invention is to provide a method for producing a colorful sole that has vivid and complicated patterns on outer periphery of the sole.
Further objectives, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.