How Wall Thickness Impacts Injection Mold Part Design
October 8, 2018
Maintaining uniform wall thickness throughout your plastic injection molding part design is critical. Without uniform wall thickness, many issues can occur such as sink, warping, short shot (meaning the material in tool does not fill correctly), and cosmetic imperfections.
Below are some general guidelines on wall thickness:
- A 10% increase in wall thickness provides approximately a 33% increase in stiffness with most materials
- Walls should be no less than 40%-60% that of adjacent walls
- Core out all unneeded thickness and wall stock
- Sharp internal corners and long unsupported part spans should be avoided
- Use ribs as stiffening features and supports to provide equivalent stiffness with less wall thickness
Selecting the proper material for your part design has a significant impact on wall thickness. How the part is expected to perform and under what conditions will play a considerable role in material selection.
There are thousands of materials available to choose from. Material properties not only effect wall thickness but also effect strength and durability. Below are some recommended wall thickness guidelines with some common materials.
Refer to the materials page on our website for additional material options click materials .
Do you have a question regarding your part design? Contact one of our Technical Specialists at 586-598-4636 or firstname.lastname@example.org. We will be happy to review your design and provide you with recommendations.