Free tools, charts and references for plastics and injection molding programs. Use them in class, put them on the lab wall, or send students here for homework. And if there is a tool your class needs that does not exist yet, tell us and we will try to build it.
Free tools and references
Where these fit in your course
| Course topic | Tools to use |
|---|---|
| Intro to injection molding | Clamp tonnage, cooling time, residence time |
| Materials and resin selection | Resin properties by grade, comparison tool, material code decoder |
| Drying and material handling | Drying guide, dryer and hopper calculator, drying chart |
| Mold design and shrinkage | Shrinkage and cavity size, cooling line flow, TCU sizing |
| Troubleshooting defects | Defect finder, problem guides, defect quick-fix chart |
| Reading specs and data sheets | How to read a data sheet, glossary, what is a COA |
Share with your students
What we offer instructors
- Custom tools for your class. Need a calculator, chart or worksheet for a lab? Tell us. If it helps students, we will build it and put it online free.
- Answers from a polymer chemist. Send student questions about resins, grades, drying or molding defects and get a plain-English answer by email.
- Printable charts for the lab. Drying, processing temperatures and defect fixes, ready to print at letter size.
Tell us what would help your class
A tool you wish existed, a chart for the lab, or a question from a student. It’s free.
Common questions
Can we use these tools in class?
Yes. Everything on this page is free to use, share and print for teaching. No sign-up, and the calculators work on a phone at the press.
Will you really build a tool for our class?
If it is useful to molders too, very likely. Tell us what you need, like a calculator, a chart or a worksheet, and we will tell you what we can do and when.
Can students send questions?
Yes. Instructors can send student questions about resins, grades and molding problems, and a polymer chemist will answer by email.
Is this a sales pitch?
No. We supply resin to molders, and well-trained techs and engineers make the whole industry better. If your program ever needs material for the lab, we are happy to quote it, but that is never a condition.