Method for continuously forming plastic sheet with vacuum pressu

Details Method for continuously forming plastic sheet with vacuum pressu Method for continuously forming plastic sheet with vacuum pressu

1974-05-28

1976-01-06

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264210R, 264286, B29C 1704

Patent

active

039313832

ABSTRACT:
A method for forming an extruded plastic sheet with vacuum pressure and without mating dies. The plastic sheet is extruded onto a heated portion of a supporting bed which maintains the sheet in a soft condition. The bed also includes a cooled portion adjacent to the heated portion with a plurality of parallel grooves which extend continuously through the cooled portion and at least partially through the heated portion. A vacuum pressure is provided within the grooves between the bed and sheet thereby pulling the sheet downwardly into the grooves. The residual heat within the sheet is then removed by the cooled portion of the bed to maintain the formed condition of the heated sheet. Various means are provided to maintain the vacuum pressure between the bed and sheet.

REFERENCES:
patent: 3024496 (1962-03-01), Colombo
patent: 3178494 (1965-04-01), Tisdale
patent: 3342914 (1967-09-01), Edwards
patent: 3471600 (1969-10-01), Meek

Affiliated with

Also associated with

Rating

Method for continuously forming plastic sheet with vacuum pressu 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 continuously forming plastic sheet with vacuum pressu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for continuously forming plastic sheet with vacuum pressu will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2350325