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Post-cure of molded polyurethane foam products

A post-curing, foaming technology, applied in the field after post-curing and before extruding foam products, can solve the problem of time-consuming post-curing operation

Inactive Publication Date: 2011-08-17
JOHNSON CONTROLS TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] While advantageous in producing molded foam articles with a denser skin to protect against deformation damage during shipping, prior art post-cure operations are time consuming

Method used

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  • Post-cure of molded polyurethane foam products
  • Post-cure of molded polyurethane foam products
  • Post-cure of molded polyurethane foam products

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Embodiment Construction

[0021] With reference to the drawings in general, and in particular to Figure 4 , the method for making a molded polyurethane foam article of the present disclosure includes a post-curing step 20 after demoulding 11 and before extrusion 40 . Additionally, the foam article is cooled 30 prior to extrusion 40 . Unless otherwise indicated, the disclosed methods may be performed in conventional manner and include well known materials and methods. As used herein, "foam article" is a broad term that may include - but is not limited to - slabstock foam, automotive foam (such as, for example, seat cushions, head rests, back cushions, armrests, etc.), furniture seating products, and industrial foams (eg, engine mounts, compressors, etc.).

[0022] The post-curing step 20 is performed as soon as possible after demolding 11 so that the core temperature of the polyurethane article remains elevated to reduce / shorten the time and energy required to perform the post-curing operation. Prefe...

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PUM

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Abstract

The present invention relates to a method of manufacturing a foam product comprising molding 10 the foam product by injecting liquid material into a mold cavity; de-molding 11 the foam product by removing the foam product from the mold cavity; post-curing 20 the foam product, after de-molding 11 and prior to crushing 40 the foam product, to reduce set damage and form a superficial layer thereon by applying auxiliary heat; and crushing 40 the foam product to obtain a predetermined reduction in thickness of the foam product by mechanically compressing the foam product. The method further comprising cooling 30 the foam product, after post-curing 20 and prior to crushing 40 the foam product, by removing the auxiliary heat applied to the foam product.

Description

[0001] Cross-references to related applications [0002] This application claims the benefit of and priority to U.S. Provisional Patent Application No. 61 / 099,142, filed September 22, 2008, by McEvoy et al., entitled "POST-CURE OF MOLDED POLYURETHANE FOAM PRODUCTS," which is incorporated by reference This article. Background technique [0003] This disclosure relates to the manufacture of molded polyurethane foam articles, and more particularly, to a method of manufacture that includes a post-curing step according to which such polyurethane articles are made stronger in an energy efficient manner And more suitable for transportation. [0004] It is well known to provide molded polyurethane foam cushions for the comfort of the occupant of a seat, whether the seat is for furniture, for equipment, or for a vehicle, such as an automobile. [0005] Molded polyurethane foams (both soft and hard varieties) can be made by the so-called "one-step" process, that is, by mixing two flui...

Claims

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Application Information

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IPC IPC(8): B29C67/00
CPCB29C44/04B29C44/5636B29C44/56B29C44/60B29C67/00
Inventor J·T·麦克沃伊山崎陵子P·麦克拉伦A·A·凯梅德S·詹蒂尔
Owner JOHNSON CONTROLS TECH CO
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