Thermoforming method and apparatus

Details Thermoforming method and apparatus Thermoforming method and apparatus

2007-01-02

2007-01-02

Lee, Edmund H. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Starting material is nonhollow planar finite length preform...

C264S237000, C264S554000, C425S388000

Reexamination Certificate

active

10807760

ABSTRACT:
A thermoforming apparatus having a mold with an internal vacuum chamber and a quench for cooling a thermoplastic sheet while it remains on the mold. Because the quench cools the sheet, conventional cooling lines are eliminated from the mold. A preferred process of using the thermoforming apparatus includes drawing a heated sheet over the mold, creating a partial vacuum in the vacuum chamber of the mold to maintain the sheet on the mold and quenching the sheet on the mold in a quenching tank. A preferred process of manufacturing a mold with an interior vacuum chamber includes forming an impression of the mold in a casting media, suspending a vacuum line or vacuum cabinet within the impression and pouring molten material around the vacuum line or vacuum cabinet to form the mold at least partially surrounding the vacuum line or vacuum cabinet. Vacuum holes are drilled through the mold from the mold face to the vacuum chamber.

REFERENCES:
patent: 60-33799 (1985-02-01), None
patent: 4-033827 (1992-05-01), None

Affiliated with

Also associated with

Rating

Thermoforming method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Thermoforming method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermoforming method and apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3743967