Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Positioning of a mold part to form a cavity or controlling...
Patent
1987-01-20
1988-08-23
Hoag, Willard
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Positioning of a mold part to form a cavity or controlling...
264 406, 264 407, 264 465, 264 467, 264261, 264334, B29C 4577, B29C 4578, B29C 6720
Patent
active
047659351
ABSTRACT:
The invention relates to a method for producing insulations of foamed plastic material, in cabinets and doors of refrigerators, freezers and the like.
According to the invention, a metered quantity of a foamable mixture is fed into the gaps between the inner and outer walls of a cabinet or door, placed in a foaming jig; the foaming process is controlled by sensing characteristic parameters, for example, the temperature of the jig, cabinet or door, or the pressure of the foaming plastic material, comparing them with reference parameters or data stored in a data processing unit. A control signal is generated to open the foaming jig and to unmold or remove the cabinet or door when at least one of the processing parameters has reached a pre-established value. The metered quantity of mixture fed in each subsequent foaming operation is corrected each time according to the changes in the peak pressure of the foam with respect to the previous foaming operation.
REFERENCES:
patent: 3265784 (1966-08-01), Jacobs
patent: 3628901 (1971-12-01), Paulson
patent: 3859400 (1975-01-01), Ma
patent: 3893792 (1975-07-01), Laczo
patent: 3937776 (1976-02-01), Hold et al.
patent: 4094940 (1978-06-01), Hold
patent: 4399105 (1983-08-01), Tilgner et al.
AFROS S.p.A.
Hoag Willard
LandOfFree
Method for foaming insulations in refrigerators and the like does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for foaming insulations in refrigerators and the like, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for foaming insulations in refrigerators and the like will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-834737