HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Feature
Materials & Assembly
Design Decisions: Resin Choice Is Critical
8/7/2012

Image 1 of 2      Next >

A knit line is any line, visible or not, where two resin flows meet. Depending on the design of the mold and the material being injected, a knit line may present no problem at all, may be a cosmetic issue, or may cause a serious structural problem.
A knit line is any line, visible or not, where two resin flows meet. Depending on the design of the mold and the material being injected, a knit line may present no problem at all, may be a cosmetic issue, or may cause a serious structural problem.

Image 1 of 2      Next >

Return to Article

View Comments: Threaded|Newest First|Oldest First
Dave Palmer
User Rank
Platinum
Materials selection criteria
Dave Palmer   8/7/2012 12:14:47 PM
NO RATINGS
This is a good introduction to materials selection in plastics.  Another important factor to consider is chemical compatibility.

Most of the factors mentioned here apply in a general sense to materials selection for metals, as well as plastics.

Overall, a very nice article.

NadineJ
User Rank
Platinum
Re: Materials selection criteria
NadineJ   8/13/2012 12:08:00 AM
NO RATINGS
I agree.  This is a very nice article.  It's good to revisit.

Dave-that's a good point about chemical compatibility.

Ann R. Thryft
User Rank
Blogger
Re: Materials selection criteria
Ann R. Thryft   8/14/2012 12:24:05 PM
NO RATINGS
Thanks for a good overview of this topic. I learned a few things!

Greg M. Jung
User Rank
Platinum
Agency Requirements
Greg M. Jung   9/15/2012 3:12:34 PM
NO RATINGS
Good article.  In many electromechanical assemblies, Agency requirements can matter also.  A polymer may be the perfect match for the strength, finish, etc. needed for the product.  However, that particular grade of polymer may not have the flame retardant properties needed to pass 94V-0 at the specified thickness in order to achieve agency certification for the entire product.  It is important to also consider agency requirements up front during product development to make sure the entire product can be certified.

Partner Zone
Latest Analysis
The diesel engine, long popular on European roads, is now piquing the interest of American automakers.
A London-based company has added some sweetness to the versatility of the 3D printing market with a printer designed solely to print candy and confections.
Although plastics make up only about 11% of all US municipal solid waste, many are actually more energy-dense than coal. Converting these non-recycled plastics into energy with existing technologies could reduce US coal consumption, as well as boost domestic energy reserves, says a new study.
Businesses cutting across industries are increasingly making use of portable display stands in the UK for marketing.
XYZ, Rabbit, and Disney innovate on the 3d printer in different ways -- from price point to using materials such as yarn.
More:Blogs|News
Design News Webinar Series
7/23/2014 11:00 a.m. California / 2:00 p.m. New York
7/17/2014 11:00 a.m. California / 2:00 p.m. New York
6/25/2014 11:00 a.m. California / 2:00 p.m. New York
5/13/2014 10:00 a.m. California / 1:00 p.m. New York / 6:00 p.m. London
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Sep 8 - 12, Get Ready for the New Internet: IPv6
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Next Class: September 30 - October 2
Sponsored by Altera
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service