Articles of wear and processes for making the same
Processes and systems for thermoforming articles of wear are disclosed. The process can include utilizing a negative pressure generation system to seal an article in a forming material thereby compressing the forming material onto the outer surface of the article. The process can also include exposing the sealed article to an increased temperature followed by exposure to a decrease temperature, while maintaining the compressive force of the forming material on the outer surface of the article. A positive pressure can also be applied to the sealed article while undergoing the heating and/or cooling steps, which can facilitate the removal of bubbles from the article during thermoforming as well as apply additional compressive force to the outer surface of the article.
1. A system for thermoforming an article, the system comprising:
a heating station;
a cooling station;
a carriage; and
a negative pressure generation system, the negative pressure generation system comprising a forming material, a sealing member, and a negative pressure generation device, wherein the negative pressure generation system is adapted to at least partly seal the article inside the forming material by exposing the article to a pressure less than atmospheric pressure;
wherein the carriage, the negative pressure generation system, and the heating station are cooperatively adapted to allow the article to be simultaneously exposed to:
thermal energy; and
the pressure less than atmospheric pressure while the article is at least partly sealed inside the forming material;
wherein the carriage, the negative pressure generation system, and the cooling station are cooperatively adapted to allow the article to be exposed to a temperature less than a temperature experienced in the heating station while the article is at least partly sealed inside the forming material and exposed to the pressure less than atmospheric pressure, and
wherein the carriage and the negative pressure generation system are cooperatively adapted to move the article, while at least partly sealed in the forming material, between the heating station and the cooling station, and wherein the carriage is coupled to at least a portion of the negative pressure generation system when moving the article, while at least partly sealed in the forming material, between the heating station and the cooling station, and when the article, while at least partly sealed in the forming material, is positioned at the heating station and at the cooling station.
2. The system according to claim 1 , wherein the forming material exhibits a melting temperature T m that is greater than about 135° C.
3. The system according to claim 1 , wherein the heating station comprises one or more thermal elements.
4. The system according to claim 3 , wherein each of the one or more thermal elements comprises an infrared radiation source.
5. The system according to claim 3 , wherein the heating station further comprises an air pressurization device adapted to pressurize air within an interior portion of the heating station.
6. The system according to claim 1 , wherein the article is an upper for a shoe, and wherein the forming material is sized to seal the entire upper inside the forming material.
7. The system according to claim 1 , wherein the carriage is adapted for coupling to the heating station when at least a portion of the article is positioned in an interior portion of the heating station.
8. The system according to claim 1 , wherein the cooling station comprises a positive pressure source and is adapted to maintain a pressure above atmospheric pressure while the article is at least partly sealed inside the forming material and exposed to the pressure less than atmospheric pressure.
9. The system according to claim 8 , wherein the article comprises an upper for a shoe, the upper comprising an outsole portion, and wherein when the upper is positioned in an interior portion of the heating station the outsole portion is prominent to the least a portion of the one or more thermal elements.