Last system for articles with braided components
A last system and a method of making the last system are disclosed. The last system includes a last member and an exterior layer. The exterior layer becomes deformable when heated above a characteristic temperature. The method can include forming a braided footwear component on the last system. The exterior layer may be joined with the braided footwear component by heating the last system above the characteristic temperature.
1. A last system for making an article of footwear, comprising:
a last member having an outer surface;
an exterior layer comprising a heat deformable material applied to at least a portion of the outer surface of the last member, the heat deformable material being moldable when heated to a temperature above a characteristic temperature of the heat deformable material; and
a footwear component formed onto at least a portion of the exterior layer, the footwear component having a plurality of braided strands that are joined with the exterior layer at the temperature above the characteristic temperature and that are bonded with the exterior layer at a temperature below the characteristic temperature.
2. The last system according to claim 1 , wherein the characteristic temperature is a glass-transition temperature of the heat deformable material.
3. The last system according to claim 1 , wherein the characteristic temperature is a melting temperature of the heat deformable material.
4. The last system according to claim 1 , wherein the heat deformable material is a thermoplastic.
5. The last system according to claim 1 , wherein the last member comprises a first material, and wherein the first material of the last member remains in a solid state at a predetermined temperature, the predetermined temperature being a temperature above the characteristic temperature of the heat deformable material.
6. The last system according to claim 5 , wherein the first material is a polymer material.
7. The last system according to claim 5 , wherein the first material is a thermosetting plastic.
8. The last system according to claim 1 , wherein the heat deformable material is applied to an upper portion of the outer surface of the last member.
9. The last system according to claim 1 , wherein the heat deformable material is applied to all of the outer surface of the last member.
10. The last system according to claim 1 , wherein the last member is characterized by a first rigidity and the exterior layer is characterized by a second rigidity.
11. The last system according to claim 10 , wherein the first rigidity is greater than the second rigidity.
12. The last system according to claim 10 , wherein the second rigidity is greater than the first rigidity.
13. The last system according to claim 10 , wherein the first rigidity is substantially equal to the second rigidity.
14. The last system according to claim 1 , wherein the braided strands of the footwear component are embedded within the exterior layer, and wherein an amount of the exterior layer separates the braided strands from the last member.
15. A method for making an article of footwear on a last system comprising:
forming a last member having a foot-shaped geometry, the last member having an outer surface and comprising a first material;
applying a moldable material to at least a portion of the outer surface of the last member, the applied moldable material defining an exterior layer and comprising a second material, the second material being different than the first material, and wherein the second material is configured to be moldable when heated to a temperature above a characteristic temperature;
forming a plurality of braided strands on the exterior layer; and
heating the exterior layer above the characteristic temperature to form a composite structure comprising the exterior layer and the plurality of braided strands, wherein an inner surface of the exterior layer separates the plurality of braided strands and the last member.
16. The method according to claim 15 , wherein the plurality of braided strands are under tension when formed on the exterior layer.
17. The method according to claim 15 , wherein the last member is formed by successive layers of material from an additive manufacturing device.
18. The method of claim 17 , wherein the moldable material is applied to the last member using the additive manufacturing device.
19. The method of claim 15 , wherein the moldable material is applied to at least the portion of the last member using a spray device.
20. The method of claim 15 , wherein the moldable material is applied to at least the portion of the last member by dipping the last member into moldable material.