Ask the experts! These processors and consultants have been there and done that. Post your enigma now!


UBBFriend: Email This Page to Someone!
   Plastic processing forums for extrusion information and advice and for other feed screw applications.
  Extrusion, Single Screw
  PET screw 2

Post New Topic  Post A Reply
profile | register | preferences | faq | search

next newest topic | next oldest topic
Author Topic:   PET screw 2
seref
Member

Posts: 3
From:istanbul turkey
Registered: Jan 2005

posted January 18, 2005 09:32 AM     Click Here to See the Profile for seref     Edit/Delete Message   Reply w/Quote
Dear Tom,
Thanks a lot for your advice. Than it's better for me not to use grooved feed.
Then let me give you some more details.
Screw is 120 mm (for Pet and PP)
L 37
Smooth barrel
First stage:
feed L/D 8, depth 16 mm
compression L/D 6,
metering L/D 5, depth 5.5
restrictor ring L/D 1 (including compression, decompression), depth 4mm
decompression L/D 0.6
second stage:
feed L/D 5, d=19
compression L/D 3
metering L/D 6 d=7
mixing torpedo L/D 2.4
rpm will be 90-120

Thanks in advance

IP: Logged

Tom C
Moderator

Posts: 950
From:Brodheadsville, PA USA
Registered: Jun 2001

posted January 18, 2005 01:56 PM     Click Here to See the Profile for Tom C     Edit/Delete Message   Reply w/Quote
You should be able to get about 400 kg/hr on PP, and 600 kg/hr on PET at 100RPM. More than that is difficult to get, less than that happens a lot for a variety of reasons. Grooves will help low PP rate.


Tom C
www.ExtrusionTechnicalServices.com

IP: Logged

jigna
Senior Member

Posts: 6
From:bombay
Registered: Jul 2005

posted August 14, 2009 02:47 AM     Click Here to See the Profile for jigna     Edit/Delete Message   Reply w/Quote
Mr. Tom,
Does this screw will work on PET Flakes or not.

quote:
Originally posted by Tom C:
You should be able to get about 400 kg/hr on PP, and 600 kg/hr on PET at 100RPM. More than that is difficult to get, less than that happens a lot for a variety of reasons. Grooves will help low PP rate.


Tom C
www.ExtrusionTechnicalServices.com

IP: Logged

Tom C
Moderator

Posts: 950
From:Brodheadsville, PA USA
Registered: Jun 2001

posted August 14, 2009 08:34 AM     Click Here to See the Profile for Tom C     Edit/Delete Message   Reply w/Quote
This is the first mention of reclaiming in your posts. It also has been four years since your original posts, so haven't you tried the screw yet?

My original posts were based on the assumption you were using pelletized, dried, PET.

Reclaiming of PET flake is another matter entirely. The output rate of this screw is likely to be much less with flakes.

Do you dry the flake?

------------------
Best Regards,

Tom Cunningham

www.ExtrusionTechnicalServices.com

IP: Logged

louis33
Senior Member

Posts: 172
From:Allentown, PA - USA
Registered: Jun 2001

posted August 17, 2009 09:02 PM     Click Here to See the Profile for louis33     Edit/Delete Message   Reply w/Quote
Perhaps he has accumulated enough regrind to make it worthwhile to process?

IP: Logged

Tom C
Moderator

Posts: 950
From:Brodheadsville, PA USA
Registered: Jun 2001

posted August 18, 2009 06:56 PM     Click Here to See the Profile for Tom C     Edit/Delete Message   Reply w/Quote
Its what you don't say, Lou.

------------------
Best Regards,

Tom Cunningham

www.ExtrusionTechnicalServices.com

IP: Logged

All times are ET (US)

next newest topic | next oldest topic

Administrative Options: Close Topic | Archive/Move | Delete Topic
Post New Topic  Post A Reply
Hop to:

Contact Us | Feed Screw Designs

Powered by Infopop www.infopop.com © 2000
Ultimate Bulletin Board 5.45a