Here are the references grouped by category without comments:

## Articles

- <https://www.plasticstoday.com/injection-molding/predicting-shrinkage-for-polypropylene>
- <https://en.wikipedia.org/wiki/Injection_moulding>
- <https://vivonomicon.com/2018/09/06/recycling-hdpe-what-doesnt-work/>
- <https://www.instructables.com/Recycled-Chopping-Board/>

## Books

- <https://nelsonmillergroup.com/resources/plastic-injection-molding-e-book/>

## Papers

- <https://nisshausa.com/pim-pulp-injection-molding/>
- <http://www.ijstr.org/final-print/oct2019/Xu-Solar-Furnace-For-Recycled-Plastic-Lumbers.pdf>
- <https://pmc.ncbi.nlm.nih.gov/articles/PMC10489002/>

## YouTube

- <https://www.youtube.com/watch?v=kcWb01c-NvY>
- <https://www.youtube.com/watch?v=JtcJAaYVMAg>

## Opensource Designs

- https://community.preciousplastic.com/library/make-a-bowl-with-kitchen-molds
- <https://builds.openbuilds.com/projectresources/pecious-plastics-open-source-machines-for-molding-and-extruding-recycled-plastics.226/>

## Patents

- <https://patents.google.com/patent/US5601772A/en>