Transparent tooling for UV radiation curable rubber

Patent metadata

Field	Value
Publication number	US-11673294-B2
Application number	US-202117195122-A
Country	US
Kind code	B2
Filing date	Mar 8, 2021
Priority date	Apr 24, 2017
Publication date	Jun 13, 2023
Grant date	Jun 13, 2023

Abstract

A mold, a molding apparatus, and a method for manufacturing articles or components is used to manufacture an article or component of the article that at least partially comprises an ultraviolet (UV) curable material. The mold and apparatus comprise at least one mold wall formed of a cyclic olefin copolymer, which is in contact with UV radiation curable material and allows the article or component of the article to be exposed to UV radiation for a period of time in order to provide for at least partial cure thereof.

First claim

What is claimed is:

1. A method for forming a molded footwear component, the method comprising:
contacting an article-forming material with a molding surface of a mold wall, wherein the molding surface comprises a cyclic olefin copolymer, and the article-forming material is an ultraviolet (UV) radiation curable polyurethane;
contacting the article-forming material with a first textile of a footwear upper;
while the article-forming material remains in contact with the molding surface and the first textile, exposing the article-forming material to pressure and UV light passing through the molding surface; and
curing the UV radiation curable polyurethane of the molding material in response to the exposure to the UV light, thereby forming a molded component of an article of footwear and affixing the first textile to the molded component.

2. The method of claim 1 , wherein the cyclic olefin copolymer comprises a copolymer of polyethylene and norbornene.

3. The method of claim 2 , wherein the cyclic olefin copolymer has a heat deflection temperature (HDT) at 0.46 MPa of at least about 140° C. as characterized by HDT testing in accordance with ISO 75-1 Test Standard.

4. The method of claim 3 , wherein the HDT of the cyclic olefin copolymer is from about 165 to about 200° C.

5. The method of claim 4 , wherein the molding surface has a surface energy of from about 15 to about 35 dynes/cm at 20° C. as characterized by surface measurement testing in accordance with ISO 8296 Test Standard.

6. The method of claim 1 , wherein the mold wall is substantially transparent to UV light, and wherein the method further comprises transmitting the UV light through the mold wall to the molding surface for exposing the article-forming material to the UV light.

7. The method of claim 1 , wherein the cyclic olefin copolymer has a heat deflection temperature (HDT) at 0.46 MPa of at least about 140° C. as characterized by HDT testing in accordance with ISO 75-1 Test Standard.

8. The method of claim 7 , wherein the HDT of the cyclic olefin copolymer is from about 165 to about 200° C.

9. The method of claim 1 , wherein the mold surface has a surface energy of from about 15 to about 35 dynes/cm at 20° C. as characterized by surface measurement testing in accordance with ISO 8296 Test Standard.

10. The method of claim 1 , wherein the mold wall forms at least part of a first die portion, and the mold further comprises a second die portion, wherein the first and second die portions are configured to move relative to each other between an opened position and a closed position, and wherein the first and second die portions in the closed position define a cavity for molding the article-forming material.

11. The method of claim 1 , wherein the mold wall forms at least part of a first die portion, and the mold further comprises a second die portion, and wherein contacting the article-forming material includes moving the first and second die portions relative to each other to a closed position for molding the article-forming material.

12. The method of claim 1 , wherein the curing attaches the first textile to one or more other footwear elements using the UV radiation material.

13. The method of claim 2 , wherein a first element of the one or more elements is a second textile.

14. The method of claim 13 , wherein a second of the one or more elements is part of an upper of an article of footwear, and wherein the curing attaches the first textile to the part of the upper.

15. A method of manufacturing an article of footwear, the method comprising:
forming a molded article in accordance with the method of claim 1 ; and affixing the molded footwear component and a part of a footwear upper and/or other footwear component to make an article of footwear.

16. The method of claim 15 , wherein the curing attaches two or more elements together using the UV curable material.

17. The method of claim 16 , wherein a first element of the two or more elements is a second textile.

18. The method of claim 17 , wherein a second of the two or more elements is part of an upper of an article of footwear, and wherein the curing attaches the second textile to the upper.

Assignees

• Nike Inc

Inventors

• CONSTANTINOU Jay

Classifications

• B29C2035/0827

  using UV radiation · CPC title

• B29K2995/0027

  for light outside the visible spectrum · CPC title

• B29L2031/50

  Footwear, e.g. shoes or parts thereof · CPC title

• B29C35/0805

  using electromagnetic radiation · CPC title

• B29K2075/00

  Use of {PU, i.e.} polyureas or polyurethanes {or derivatives thereof}, as moulding material · CPC title