Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Utilizing plasma – electric – electromagnetic – particulate – or...
Patent
1976-08-24
1977-08-16
Pavelko, Thomas P.
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Utilizing plasma, electric, electromagnetic, particulate, or...
264 23, 264101, 264233, 264234, 264334, 264343, B29D 1100
Patent
active
040426521
ABSTRACT:
A method is disclosed which involves the production of shaped silicone elastomer-containing articles. In making an article of this type, a silicone elastomer-containing mass is formed to the desired configuration by subjecting it to pressure with a suitable die or pair of dies. Generally, the shaped mass will adhere to the die, or to one of the pair of dies, used for the shaping operation. A mechanical loosening of the shaped mass poses great difficulties. On the one hand, if sufficient caution is not excerised during loosening of the shaped mass, scratching or breakage of the latter will occur, particularly if the shaped mass is of small thickness. On the other hand, the exercise of great caution during loosening of the shaped mass is very time-consuming and, further, may still not yield satisfactory results if the shaped mass is of small thicnkess. In accordance with the invention, these problems are avoided in that the detachment of the shaped mass from the die to which it adheres is effected by contacting the shaped mass with a medium which impregnates the shaped mass so as to cause swelling of the latter. As a result, the shaped mass becomes loosened from the die without the danger of damage thereto. The medium may subsequently be removed from the shaped mass by heating and/or by the use of a vacuum. Suitable media for effecting detachment of the shaped mass from the die include the aliphatic, the aromatic and the halogenated hydrocarbons.
REFERENCES:
patent: 3350216 (1967-10-01), McVannel
patent: 3361858 (1968-01-01), Wichterle
patent: 3542907 (1970-11-01), Wichterle
patent: 3649236 (1972-03-01), Rosenbauer
AGFA-Gevaert A.G.
Pavelko Thomas P.
Striker Michael J.
LandOfFree
Method for the production of silicone elastomer-containing artic 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 the production of silicone elastomer-containing artic, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for the production of silicone elastomer-containing artic will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-361455