Method and apparatus for the continuous extrusion and blowing of

Details Method and apparatus for the continuous extrusion and blowing of Method and apparatus for the continuous extrusion and blowing of

1979-03-13

1981-01-06

Thurlow, Jeffrey R.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

264176R, 264349, 425207, 4253261, 425376A, B29D 2304

Patent

active

042436290

ABSTRACT:
The heating of the powder of rigid polyvinyl chloride in an extrusion machine of known type presents difficulties and causes burning. According to the invention this is avoided by introducing continuously the raw material in the form of powder after intense mixing with stabilizer and plasticizer in the feed opening of a monoscrew extruder. The said monoscrew extruder has eight different zones: an introduction zone preferably without heating; a slightly heated compression zone; a heated homogenization zone (H); a plasticizing zone; a heated decompression zone (D); a heated degasifying zone (G); a heated compression zone (K.sub.2) and a heated expulsion zone.
For the plasticizing there is inserted in the extrusion screw before the decompression zone (D) a ring (3) provided with calibrated bores (4 and 5) which obstruct, that is, delay the flow so as to plasticize it without having to increase the temperature.

REFERENCES:
patent: 3171160 (1965-03-01), Moyer
patent: 3212133 (1965-10-01), Heidrich
patent: 3467743 (1969-09-01), Otani
patent: 3489830 (1970-01-01), Grigull
patent: 4074362 (1978-02-01), Kruder et al.

Affiliated with

Also associated with

Rating

Method and apparatus for the continuous extrusion and blowing of 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 and apparatus for the continuous extrusion and blowing of, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for the continuous extrusion and blowing of will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-284839