Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


plastic pencil extruding machine extruding core and sheath together

plastic pencil extruding machine extruding core and sheath together

plastic pencil extruding machine extruding core and sheath together

hi everybody! i am involved in designing a extruder capable
of receive plastic material of both black core and yellow
sheath from two chambers and heat them and syncronizedly extrude themand cut them in lengh automaticaly . can
anybody help me and give me any means of advise?

RE: plastic pencil extruding machine extruding core and sheath together

You need to develop a coextrusion process using two extruders. There are a variety of methods of making the two layers, which I assume are concentric. Since you intend to cut to length in this operation can I also assume that these are thermoplastic resins as opposed to thermoset? If you can furnish a little more information, such as estimated lbs/hr(kg/hr) and size of the finished extrudate inches(mm) I can be more helpful in specifying some proposed equipment and typical production processes.

Don Leffingwell

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


White Paper - Considerations for choosing a 3D printing technology
The adoption of 3D printing into major companies’ product development life cycles is a testament to the technology’s incredible benefits to consumers, designers, engineers and manufacturers. While traditional production methods have limitations in manufacturability, 3D printing provides unparalleled design freedom due to the additive method of building parts layer by layer. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close