Forming station and process for twin sheet thermoforming

Details Forming station and process for twin sheet thermoforming Forming station and process for twin sheet thermoforming

2005-11-29

2005-11-29

Davis, Robert B. (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Preform assembly means and means for bonding of plural...

With additional shaping means to form or reshape preform...

C264S545000, C425S503000, C425S519000, C425S521000

Reexamination Certificate

active

06969246

ABSTRACT:
A forming station for a thermoformer in which the lower platen is lowered and moved laterally on linear bearings on the machine frame after two sheets are formed in side by side mold-plug assist tool sets so as to align the respective molds and formed sheets. The formed sheets are squeezed together with flanges on the formed sheets thereby fused together by a draw mechanism including a series of hydraulic cylinders which are connected to coupled elements carried by the upper and lower platens so as create the squeezing movement when the cylinders are pressurized. A precision control is exercised over the operation of each of the cylinders using a position sensing device associated with each cylinder to insure equal movement of the output member of each cylinder. The lower platen vertical drive is activated in correspondence with the travel produced by the hydraulic cylinders to reduce the load on a brake holding the upper platen stationary.

REFERENCES:
patent: 3669594 (1972-06-01), Brown et al.
patent: 3779687 (1973-12-01), Alesi
patent: 3854860 (1974-12-01), Haag
patent: 3868209 (1975-02-01), Howell
patent: 5427732 (1995-06-01), Shuert
patent: 5759591 (1998-06-01), Rhoades et al.
patent: 5800846 (1998-09-01), Hart
patent: 5814185 (1998-09-01), Chun et al.
patent: 5885691 (1999-03-01), Breezer et al.
patent: 6187252 (2001-02-01), Rhoades et al.
patent: 6200122 (2001-03-01), Chun et al.
patent: 6372176 (2002-04-01), Ekendahl et al.
patent: 6386856 (2002-05-01), Chern et al.
patent: 6705853 (2004-03-01), Nehring
patent: 2002/0017745 (2002-02-01), Vorenkamp et al.

Affiliated with

Also associated with

Rating

Forming station and process for twin sheet thermoforming does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Forming station and process for twin sheet thermoforming, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Forming station and process for twin sheet thermoforming will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3501639