---
title: Heat your mould
slug: heat-your-mould
step: 7
howto: make-plaster-moulds-for-large-products
tags: ["product","injection","extrusion","mould"]
category: Moulds
difficulty: Medium
time: < 1 week
location: 
---
# Step 7: Heat your mould
Since this is a slow injection molding process, it is essential to ensure the inside of the mold remains consistently hot. This can be achieved in various ways; in this instance, large holes were drilled to circulate hot air through the mold from two heat guns.
![IMG_3666 copy.jpg](/resources/howtos/make-plaster-moulds-for-large-products/img_3666_copy.jpg)