Method and device for producing rebonded foam blocks

Details Method and device for producing rebonded foam blocks Method and device for producing rebonded foam blocks

2006-12-05

2006-12-05

Theisen, Mary Lynn (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

C264S115000, C264S916000, C425S383000, C425S409000, C425S415000, C425S451900, C425S81700C

Reexamination Certificate

active

07144534

ABSTRACT:
The invention relates to a method of producing rebonded foam blocks in a box mould having a base, a plurality of mutually adjacent mould side walls standing thereupon and a plunger movable in the direction of the base, in which at least one of the mould side walls may be swiveled about a substantially horizontal swivel axis mounted on the base between an outwardly directed position and a substantially vertical position, the method involving mixing the foam flakes with a binder, swiveling at least one of the mould side walls outwards such that the cross-sectional area of the box mould increases from the bottom upwards, introducing the foam flakes into the box mould, adjusting the at least one mould side wall so that the cross-sectional area of the box mould is substantially constant over its height, compressing the foam flakes by means of the plunger to the desired density or foam block height, thereby bonding together the foam flakes and removing the finished foam block from the mould.

REFERENCES:
patent: 4243617 (1981-01-01), Burge
patent: 5292462 (1994-03-01), Nestle
patent: 6132655 (2000-10-01), Ray
patent: 6261498 (2001-07-01), Sulzbach et al.
patent: 6358036 (2002-03-01), Sulzbach et al.

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