Molded footwear with woven appearance and ventilation features
View Patent ↗According to embodiments of the invention, a precursor sheet is formed by injecting an EVA-based material into a mold cavity. The mold cavity is configured to create a series of indentations through a first portion of the precursor sheet and into a second portion of the precursor sheet. The precursor sheet is removed from the mold cavity and the second portion of the precursor sheet is removed from the first portion of the precursor sheet to create an isolated sheet with a series of through-holes. The isolated sheet is then formed into a portion of a shoe.
1. A method of making at least a portion of a shoe comprising:
injecting a material into a mold cavity to create a precursor sheet, wherein the mold cavity is configured to create a three-dimensional texture in a first surface of a first portion of the precursor sheet, the three-dimensional texture extending through the first portion of the precursor sheet;
removing the precursor sheet from the mold cavity;
removing a second portion of the precursor sheet from the first portion of the precursor sheet to create a second surface of the first portion of the precursor sheet that is opposite the first surface; and
forming the first portion of the precursor sheet into at least a portion of a shoe.
2. The method of claim 1 , wherein the material is an EVA-based material.
3. The method of claim 2 , wherein the mold cavity in which the EVA-based material is injected is configured to create a series of regularly spaced indentations through the first portion of the precursor sheet as at least part of the three-dimensional texture.
4. The method of claim 1 , wherein the step of removing the second portion of the precursor sheet from the first portion of the precursor sheet comprises cutting the precursor sheet along a plane that does not intersect the first surface of the first portion of the precursor sheet.
5. The method of claim 4 , wherein the step of removing the second portion of the precursor sheet from the first portion of the precursor sheet further comprises cutting the precursor sheet along the plane that does not intersect the first surface of the first portion of the precursor sheet at a surface of the precursor sheet that intersects the first surface.
6. The method of claim 4 , wherein the step of removing the second portion of the precursor sheet from the first portion of the precursor sheet further comprises cutting the precursor sheet along a second plane that intersects the first surface along a line located outside of the three-dimensional texture.
7. A method of making at least a portion of a shoe comprising:
injecting an EVA-based material into a mold cavity to form a precursor sheet, wherein the mold cavity is configured to create a series of indentations extending through a first surface of the precursor sheet and through a first section of the precursor sheet, wherein each indentation in the series of indentations includes a closed end in a second section of the precursor sheet;
removing the precursor sheet from the mold cavity;
separating the second section of precursor sheet from the first section of the precursor sheet, including removing the closed end of each indentation from the remaining portions of the indentations, to form an isolated section having a series of through holes; and
forming the isolated section into at least a first portion of a shoe.
8. The method of claim 7 , wherein forming the isolated section into the portion of the shoe comprises the following steps: heating the isolated section and compressing the isolated section about a last.
9. The method of claim 7 , wherein the mold cavity in which the EVA-based material is injected is configured to create a series of regularly spaced indentations through the first section of the precursor sheet.
10. The method of claim 7 , wherein the EVA-based material has an expansion coefficient approximately equal to or lower than 1.7.
11. The method of claim 7 , wherein the mold cavity is further configured to create a second series of indentations through a second surface of the precursor sheet and through a third section of the precursor sheet, wherein each indentation in the second series of indentations includes a closed end in the second section of the precursor sheet.
12. The method of claim 11 , wherein the isolated section is an isolated first section, the method further comprising:
separating the third section of the precursor sheet from the second section of the precursor sheet to form an isolated second section; and
forming the isolated second section into at least a second portion of the shoe.