East West Manufacturing Blog

4 Tools Everyone Injection Molding Plastic Should Be Using

Written by East West Manufacturing | November 20, 2014

Contract Manufacturing plastics have come a long way over the years and yet the fastest way to sabotage a client’s trust is to deliver samples or finished product with sink marks and voids. Do you want to know the 4 tools to keep this from happening?

The key to saying goodbye to sink marks and voids with successful plastic injection molding is found in the DFM stage.  Design For Manufacturing (or Manufacturability is the designing (or redesigning) of products that make them easy to manufacture..

When we engage with a customer we start at DFM long before we cut steel for tooling and even longer before we begin sampling and production.  The 4 Tools to avoid Sink Marks and Voids:

  1. Raw Material Selection:  Are the raw material and additives you have selected the best choices to achieve the functionality and aesthetic finished product you want?  This is a question a manufacturing engineer can help with during the Design For Manufacturing process.

  2. Processing:  Are the cycle times correct?  Are you operating at the right temperature, for the right time, to achieve the tolerances you need?  Who is helping to determine the optimal processing speeds?

  3. Mold Design:  Are there enough cooling lines?  Are the gates the proper size and in the optimal location.  Did you choose the correct steel for the tool?  Incorrect steel can limit the life of the tool and host of other issues.

  4. Optimal Design:  Is the design of the component or sub-assembly most optimal to achieve the form, fit, and function you desire.

 What is exactly is Design for Manufacturing or DFM? Check out our blog post here to learn more.