METHOD OF MANUFACTURING A BI-AXIAL BRAIDED ARTICLE OF FOOTWEAR
A method of manufacturing is provided, with an initial step of providing an automated braiding machine having a braid ring assembly and a plurality of spools associated with the braid ring assembly, each of the plurality of spools containing a strand of braiding material. When initially braiding the article of footwear, the spools on the braid ring assembly are in a first set of positions. Continuing, the article of footwear is braided beginning with a first end of the article of footwear with the spools on the braid ring assembly in the first set of positions. Upon reaching a transition point of the article of footwear, the spools on the braid ring assembly are positioned in a second set of positions. Finally, the article of footwear is braided from the transition point to the second end, with the spools on the braid ring assembly in the second set of positions.
This application claims benefit of U.S. Provisional Application 62/513,202 filed on May 31, 2017 and entitled Method of Manufacturing a Bi-Axial Braided Article of Footwear. The entirety of the aforementioned application is incorporated by reference herein.
TECHNICAL FIELDThe present invention relates to a braided article of footwear, and in particular, an upper for an article of footwear.
BACKGROUNDArticles of footwear typically have an upper that provides an enclosure for receiving the foot of a wearer. It is desirable to have an upper construction that supports and protects a wearer's foot, yet also provides comfort for the wearer. Accordingly, shoe uppers may be created using a wide variety of materials and manufacturing techniques, in order to impart flexibility and aesthetic characteristics desired by the wearer of the upper.
One such technique available for manufacturing a shoe upper is braiding. However, due to previous limitations with braiding as a shoe upper manufacturing technique, the individual yarns of a braided shoe upper were typically aligned in a single axis.
Aspects herein are generally directed to a method of manufacturing an article of footwear having a first end and an opposing second end, the method comprising providing an automated braiding machine having a braid ring assembly and a plurality of spools associated with the braid ring assembly, each of the plurality of spools containing a strand of braiding material. The method further comprises positioning the spools on the braid ring assembly in a first set of positions, braiding the article of footwear, beginning with a first end of the article of footwear, with the spools on the braid ring assembly in the first set of positions, upon reaching a transition point of the article of footwear, positioning the spools on the braid ring assembly in a second set of positions, and braiding the article of footwear from the transition point to the second end the article of footwear, with the spools on the braid ring assembly in the second set of positions.
Additionally, aspects herein are generally directed to a method of manufacturing an article of footwear utilizing an automated braiding machine having a braid ring assembly, the method comprising positioning the spools on the braid ring assembly in a first configuration, braiding the article of footwear with the spools on the braid ring assembly in the first configuration, the method continues by positioning the spools on the braid ring assembly in a second configuration, braiding the article of footwear with the spools on the braid ring assembly in the second configuration.
Still further, aspects herein are generally directed to an article of footwear having a toe end and an heel opening, the article of footwear comprising a first section braided with a plurality of yarns in a first plane, a second section braided with the plurality of yarns in a second plane, and a transition section positioned between the first section and the second section, wherein the transition section further comprises a beginning transition point proximate the first section and an ending transition point proximate the second section, wherein the plurality of yarns of the transition section linearly transitions from the first plane to the second plane.
Braiding is a process of interlacing or interweaving three or more yarns diagonally to a product axis in order to obtain a thicker, wider or stronger product or in order to cover (overbraid) some profile. Interlacing diagonally means that the yarns make an angle with the product axis, which can be between 1 and 89 degrees but is usually in the range of 30-80 degrees. This angle is called the braiding angle. Braids can be linear products (ropes), hollow tubular shells or solid structures (one, two or three-dimensional textiles) with constant or variable cross-section, and of closed or open appearance.
As used herein, the yarns used for braiding may be formed of different materials having different properties. The properties that a particular yarn will impart to an area of a braided component partially depend upon the materials that form the yarn. Cotton, for example, provides a softer product, natural aesthetics, and biodegradability. Elastane and stretch polyester each provide substantial stretch and recovery, with stretch polyester also providing recyclability. Rayon provides high luster and moisture absorption. Wool also provides high moisture absorption, in addition to insulating properties and biodegradability. Nylon is a durable and abrasion-resistant material with relatively high strength. Polyester is a hydrophobic material that also provides relatively high durability. In addition to materials, other aspects of the yarn selected for formation of a braided component may affect the properties of the braided component. For example, a yarn may be a monofilament or a multifilament. The yarn may also include separate filaments that are each formed of different materials. In addition, the yarn may include filaments that are each formed of two or more different materials, such as a bicomponent yarn with filaments having a sheath-core configuration or two halves formed of different materials.
As discussed herein, braided structures can be formed as tubular braids on a braiding machine, such as a radial, axial or lace braiding machine. One example of a lace braiding machine can be found in Ichikawa, EP 1 486 601, granted May 9, 2007 entitled “Torchon Lace Machine” and EP No. 2 657 384, published Oct. 30, 2013 entitled “Torchon Lace Machine,” the entirety of which are hereby incorporated by reference. The upper portion of an exemplary braiding machine 10 is shown in
As best seen in
In some aspects, the size of braiding machine 10 may be varied. It should be understood that the braiding machine 10 shown and described is for illustrative purposes only. In some aspects, braiding machine 10 may be able to accept 144 carriages, although other sizes of braiding machines, carrying different numbers of carriages and spools is possible and is within the scope of this disclosure. By varying the number of carriages and spools within a braiding machine, the density of the braided structure as well as the size of the braided component may be altered.
Turning now to
With continued reference to
However, other orientations of the first plane of braiding 106 and second plane of braiding 108 are considered to be within the scope of this disclosure. For example, the first plane of braiding 106 may be placed in an X-Z orientation, while the second plane of braiding 108 may be placed in a Y-Z orientation or an X-Y orientation. Regardless of the exact planes of braiding selected, the important aspect of the planes of braiding is that the first plane of braiding 106 and the second plane of braiding 108 are perpendicular to each other, such that a “Mobius-twist” is performed to rotate from the first plane of braiding 106 to the second plane of braiding 108. However, aspects in which the first plane of braiding 106 and the second plane of braiding 108 are not perpendicular are considered to be within the scope of this disclosure. For example, the first plane of braiding 106 and the second plane of braiding 108 may be offset 45 degrees from one another, or may be offset any other amount between 0 and 90 degrees from each other. Generally, the article of footwear will have the greatest resistance to stretch in a direction that aligns to the plane of braiding used to manufacture that portion of the article of footwear. In other words, the amount of “Mobius-twist” performed changes the functional characteristics of the article of footwear created by the methods described herein.
In accordance with aspects herein, the “Mobius-twist” is generally performed at a transition point 110 of the article of footwear, which generally refers to a point of the article of footwear in which the first plane of braiding 106 and second plane of braiding 108 intersect. In some aspects, the first plane of braiding 106 may transition to the second plane of braiding 108 instantaneously at the transition point 110. The transition point 110 may be located between 2 and 6 inches from the first end 102 of the article of footwear. However, in some aspects, the first plane of braiding 106 may gradually morph into the second plane of braiding 108. In this aspect, the transition point 110 may be more accurately referred to as a transition section 112, wherein the transition section 112 has a beginning transition point 114a and an ending transition point 114b. Similar to the transition point 110, the beginning transition point 114a may be located between 2 and 6 inches from the first end 102 of the article of footwear.
Thus far in this disclosure, the discussion with respect to
Turning now to
For example, the lead spool can be tracked from the first set of positions 210 as shown in
Turning now to
Turning now to
Turning now to
Examples of the present invention have been described with the intent to be illustrative rather than restrictive. Alternative examples will become apparent to those skilled in the art that do not depart from its scope. A skilled artisan may develop alternative means of implementing the aforementioned improvements without departing from the scope of the present invention.
It will be understood that certain features and subcombinations are of utility and may be employed without reference to other features and subcombinations and are contemplated within the scope of the claims.
Claims
1. A method of manufacturing an article of footwear having a first end and an opposing second end, the method comprising:
- providing an automated braiding machine having a braid ring assembly and a plurality of spools associated with the braid ring assembly, each of the plurality of spools containing a strand of braiding material;
- positioning the spools on the braid ring assembly in a first set of positions;
- braiding the article of footwear, beginning with a first end of the article of footwear, with the spools on the braid ring assembly in the first set of positions;
- upon reaching a transition point of the article of footwear, positioning the spools on the braid ring assembly in a second set of positions; and
- braiding the article of footwear from the transition point to the second end the article of footwear, with the spools on the braid ring assembly in the second set of positions.
2. The method of manufacturing of claim 1, wherein the second set of positions is obtained by rotating the first set of positions.
3. The method of manufacturing of claim 2, wherein the rotating of the first set of positions is between 0 and 45 degrees.
4. The method of manufacturing of claim 2, wherein the rotating of the first set of positions is between 45 and 90 degrees.
5. The method of manufacturing of claim 1, wherein the first end of the article of footwear is a toe end.
6. The method of manufacturing of claim 1, wherein the first end of the article of footwear is an ankle end.
7. The method of manufacturing of claim 1, wherein the first end of the article of footwear is braided in a first braiding plane, and wherein the second end of the article of footwear is braided in a second braiding plane.
8. The method of manufacturing of claim 7, wherein the first braiding plane is perpendicular to the second braiding plane.
9. The method of manufacturing of claim 7, wherein the first braiding plane is offset 45 degrees from the second braiding plane.
10. The method of manufacturing of claim 1, wherein the transition point is positioned between 2 to 6 inches from the first end of the article of footwear.
11. A method of manufacturing an article of footwear utilizing an automated braiding machine having a braid ring assembly, the method comprising:
- positioning the braid ring assembly in a first configuration;
- braiding the article of footwear with the braid ring assembly in the first configuration;
- positioning the braiding ring assembly in a second configuration;
- braiding the article of footwear with the braid ring assembly in the second configuration.
12. The method of manufacturing of claim 11, wherein braiding the article of footwear with the braid ring assembly in the first configuration results in a first end of the article of footwear being braided in a first braiding plane, and wherein braiding the article of footwear with the braid ring assembly in the second configuration results in the second end of the article of footwear being braided in a second braiding plane.
13. The method of manufacturing of claim 12, wherein the article of footwear further comprises a transition section positioned between the first end and the second end.
14. The method of manufacturing of claim 13, wherein the transition section further comprises a beginning transition point and an ending transition point, the beginning transition point defined at an end of the first braiding plane, and the ending transition point defined at an end of the second braiding plane.
15. The method of manufacturing of claim 11, wherein the second configuration is achieved through rotating the braid ring assembly between 45 and 90 degrees from the first configuration.
16. The method of manufacturing of claim 11, wherein the second configuration is achieved through rotating the braid ring assembly between 0 and 45 degrees from the first configuration.
17. The method of manufacturing of claim 11, wherein the first end of the article of footwear is a toe end.
18. The method of manufacturing of claim 11, wherein the first end of the article of footwear is a heel end.
19. An article of footwear having a toe end and an heel opening, the article of footwear comprising:
- a first section at the toe end, braided with a plurality of yarns in a first direction; and
- a second section at the heel end, braided with the plurality of yarns in a second direction.
- a transition section positioned between the first section and the second section, wherein the transition section further comprises a beginning transition point proximate the first section and an ending transition point proximate the second section, wherein the plurality of yarns of the transition section linearly transitions from the first direction to the second direction.
20. The article of footwear of claim 19, further comprising a transition section positioned between the first section and the second section, wherein the transition section further comprises a beginning transition point proximate the first section and an ending transition point proximate the second section, wherein the plurality of yarns of the transition section linearly transitions from the first direction to the second direction.
21. The article of footwear of claim 19, wherein the first direction is orthogonal to the second direction.
Type: Application
Filed: May 29, 2018
Publication Date: Dec 6, 2018
Inventors: Robert M. Bruce (Portland, OR), Eun Kyung Lee (Beaverton, OR), James Y. Yoo (Portland, OR), Chikao Ichikawa (Gunma)
Application Number: 15/991,847