---
title: Inject!
slug: inject
step: 6
howto: skate-rails-how-2-make--use-recycled-skate-rails
tags: ["product","research","injection","mould"]
category: Products
difficulty: Easy
time: < 1 hour
location: Los Angeles, United States of America (the)
---
# Step 6: Inject!
I have been utilizing an injection machine equipped with a car jack, as the mold's width prevents it from fully attaching to the machine. The rail mold requires approximately 80 grams (2.8 ounces) of molten plastic, though this may vary based on the plastic type. Consequently, about 80% of the filled machine's plastic is used. Additionally, I preheat the mold for 15 minutes at 250°F (121°C) to ensure a smoother flow of molten plastic.
![IMG_6334.jpg](/resources/howtos/skate-rails-how-2-make--use-recycled-skate-rails/img_6334.jpg)
![IMG_6336.jpg](/resources/howtos/skate-rails-how-2-make--use-recycled-skate-rails/img_6336.jpg)
![IMG_6337.jpg](/resources/howtos/skate-rails-how-2-make--use-recycled-skate-rails/img_6337.jpg)