Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By gas forming or expanding
Patent
1998-04-16
2000-07-11
Kuhns, Allan R.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
By gas forming or expanding
264 458, B29C 4446
Patent
active
060868023
ABSTRACT:
A process and a plant (1) for the manufacture of latex foam products comprising recesses, such as mattresses (2), cushions and the like include a plurality of carriers (9) placed in a ring-like configuration limited by a first, upper stretch (10) between a foam injecting station (3) and a product-removing station (5) and by a second lower stretch (11) for the return of the carriers devoid of foam, to the injecting station.
At any moment the first stretch (10) is filled with carriers (9), touching each other and making a single mold on which foam is injected, while on the second stretch, at least one carrier, or a discrete number of carriers, considerably separated from one another, travel. The carriers (9) of the first and second stretch (10,11) are moved by different and independent operating systems and the speed of the carriers of the second stretch is considerably higher than the one of the carriers of the first stretch, so that, whatever the adopted solution, a carrier (9) can be always present at the injecting station (3), while another carrier leaves the removing station (5).
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Herlin Francis
Levera Guido
Kuhns Allan R.
Sapsa Bedding S.p.A.
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