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: Oldest First|Newest First|Threaded View
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
Perfection is a laudable, but ultimately unattainable, goal, even for the world's most successful consumer electronics company. You know the hits; here are Apple's all-time greatest misses.
Siemens' new version of Imagine Lab was designed to help the automotive and aerospace industries meet environmental mandates.
Belden and Secomea have developed a remote access system that gives users a plug-and-play connection to plant assets.
Here are some of the top-paying jobs available to engineers as they grow in their careers.
As manufacturers add new technologies to their products, designing for compliance becomes more difficult. Prepare for the certification testing process. Otherwise, you increase the risk of discovering a safety issue after a product leaves the assembly line. That will cause significant time-to-market delays, be much costlier to fix, and damage your brand in the eyes of customers. 
More:Blogs|News
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7 | 8 | 9 | 10


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.
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Technology Marketplace

Copyright © 2016 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service