Processes and production apparatus for rigid cellular materials

Details Processes and production apparatus for rigid cellular materials Processes and production apparatus for rigid cellular materials

1980-10-10

1981-10-06

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

249 82, 249126, 264 54, 264DIG3, 425817R, B29D 2700

Patent

active

042935113

ABSTRACT:
An improved process and apparatus for producing rigid cellular materials comprising polyvinyl chloride, wherein the controlled expansion of embryonic blocks obtained by molding, is carried out in a single expansion box closed throughout the whole duration of the expansion treatment, in several stages including pre-heating, pre-expanding and final expansion to the final dimensions of the block, the expansion box containing the block expanded to its final dimensions being then immersed in a bath of cold water for dimensional stabilization.
The expansion box comprises at least two plates, with a frame attached to the lower face of each plate, to form, in use, a closed expansion box which is provided with a centering and holding mechanism to maintain the embryonic block in place within the expansion box, a device for opening and closing the expansion box being also provided, as well as a mechanism for transferring a plurality of expansion boxes assembled together from one bath to the other in succession.

REFERENCES:
patent: 2374233 (1945-04-01), Pfleumer
patent: 2576749 (1951-11-01), Carpentier
patent: 2589537 (1952-03-01), Carpentier
patent: 2590156 (1952-03-01), Carpentier
patent: 3003192 (1961-10-01), Pfleumer
patent: 3161911 (1964-12-01), Mathews
patent: 3283043 (1966-11-01), Landler et al.
patent: 3290262 (1966-12-01), Leclereq et al.
patent: 3311948 (1967-04-01), Axelsonn
patent: 4079107 (1978-03-01), Brunner et al.

Affiliated with

Also associated with

Rating

Processes and production apparatus for rigid cellular materials does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Processes and production apparatus for rigid cellular materials , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Processes and production apparatus for rigid cellular materials will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1206294