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Buffing expanded foam items

A foam and article technology, applied in the field of foam article processing, can solve the problems of increasing the workload of pre-formed foam parts and the like

Active Publication Date: 2015-04-29
NIKE INNOVATE CV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A skin on a preform may increase the workload for further processing of the preformed foam portion to result in the desired subsequent or final foam shape intended to be assembled into an article of footwear

Method used

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  • Buffing expanded foam items
  • Buffing expanded foam items
  • Buffing expanded foam items

Examples

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Embodiment Construction

[0029] The present invention relates to the treatment of foam articles. Aspects of the invention relate to polishing an expanded foam item to remove at least a portion of the expanded foam item in preparation for further processing of the expanded foam item. One specific example of a product that typically utilizes foam is an article of footwear. Articles of footwear may include shoes, boots, sandals, and the like. For convenience, the term "shoe" is used herein as representative of an article of footwear. Shoes often utilize ethylene vinyl acetate ("EVA"), polyurethane, or other types of foam to provide cushioning (eg, impact attenuation) to the midsole or elsewhere in the shoe's construction. Although the invention is described in some instances with specific reference to foams such as EVA foam used in shoes, the invention may utilize other types of expanded foam materials and / or for use in products other than shoes.

[0030] According to an aspect of the invention, a met...

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Abstract

Foam items may be buffed using particles such as particulate sodium bicarbonate in accordance with the present invention. Foam items may be, for example, expanded EVA foam items pre-formed into an intermediate size and shape. A skin layer may be formed during the expansion of the foam item to form an expanded foam item which may be entirely or partially removed by buffing the item using particles projected with selected buffing parameters. The buffing parameters may be varied based upon the thickness of at least a portion of the skin layer and / or the desired degree of moldability for the foam item after buffing. Particulate sodium bicarbonate or other types of particles used for buffing may be recycled and reused for further buffing of foam items.

Description

[0001] Cross References to Related Applications [0002] The subject matter of this application is related to a concurrently filed application entitled BUFFING EXPANDED FOAM ITEMS having attorney docket number NIKE.183324. technical field [0003] Aspects relate to the handling of foam items. More specifically, the present invention relates to polishing foam items made of materials such as ethylene vinyl acetate that have been formed into expanded foam structures. The present invention relates to the treatment of the surface of such foam items to remove all or part of an outer layer, such as a tough and dense skin layer, from the exterior of the foam item to allow the item to be more resilient by applying heat and / or pressure. Effectively molded into a subsequent form. Background technique [0004] An article of footwear may be constructed with a foam sole portion. Forming the foam portion may include forming the foam portion into a pre-formed foam portion having a size, ...

Claims

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Application Information

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IPC IPC(8): B24C3/10B24C9/00
CPCB24C1/086A43D117/00B29C44/5627B29D35/0054B29D35/0063B29D35/122A43D8/36A43D27/00
Inventor 帕特里克·科纳尔·里根李东宇朴根罗杨东烨张溶株金柄基李尚举徐钟车
Owner NIKE INNOVATE CV
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