Method for manufacturing integral elastic supports, and supports

Details Method for manufacturing integral elastic supports, and supports Method for manufacturing integral elastic supports, and supports

1995-08-03

1997-09-23

Ahmad, Nasser

Stock material or miscellaneous articles

Sheet including cover or casing

Foamed or expanded material encased

5449, 5481, 5654, 5909, 297199, 297200, 29745241, 428 68, 428 76, 4283202, B32B 300

Patent

active

056702329

ABSTRACT:
A method for manufacturing integral elastic supports formed by an upper covering (2), by an intermediate filler (3) and by a semirigid shell (4) entails the use of a mold with a hollow lower part, a flat upper part, and at least one intermediate plate. The method includes the following steps: opening of the mold; deposition on the lower part of a covering sheet with an excess border; securing of the excess border by means of the locking plate; deformation of the covering sheet in vacuum; pouring of a first layer of a gel compound in the fluid state; coupling of a semirigid shell to the upper part of the mold; pouring of a second layer of an expandable resin in the fluid state; closing of the mold; opening of the mold and removal of the finished support. The expandable resin is poured onto the gel compound after a period of time that is sufficient to allow the compound to assume a consistency and shape of its own but is shorter than the full polymerization time so as to allow it to react at least partially with the resin.

REFERENCES:
patent: 4456642 (1984-06-01), Burgdofer
patent: 4999068 (1991-03-01), Chiarella

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