×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Jobs

Can Polycarbonate be Blow Molded?
4

Can Polycarbonate be Blow Molded?

Can Polycarbonate be Blow Molded?

(OP)
I have a customer that wants to injection mold a base then blow mold a sphere from it.

Can this be done in Polycarbonate?

I have extensive experience with injection molding of engineering grade resins but know nothing about blow molding.

Thanks in advance.

Pat

RE: Can Polycarbonate be Blow Molded?

Sounds like he wants injection-blow molding.  Yes- PC is suitable. Contact resin manufacturer for sable grades.

RE: Can Polycarbonate be Blow Molded?

(OP)
So this part can be produced injection-blow molded in one operation?

RE: Can Polycarbonate be Blow Molded?

Hi,

The majority of babies' milk bottles are blow moulded....


Rgds

Harry

RE: Can Polycarbonate be Blow Molded?

And 20 litre cooler water bottles.

It can be injection blow or extrusion blow moulded.

As suggested, contact material suppliers. Also contact machinery suppliers.

Regards

eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

RE: Can Polycarbonate be Blow Molded?

yes

ask supplier for "blow molding" grade

that's it

RE: Can Polycarbonate be Blow Molded?

The critical parameter is the melt flow rate. The material for blow molding should have higher value than the injection molding grade.

RE: Can Polycarbonate be Blow Molded?

Actually its a lower melt flow rate or higher viscosity.

You need the parison to have enough strength when melted to support it's own weight while being stretched by the blowing process.

Regards

eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

RE: Can Polycarbonate be Blow Molded?

Sorry that I made mistake. Pat is right!
Blow molding grade should have lower melt flow rate.

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!


Resources