PLA Glue Gun

In this project, we'll explore how to create a PLA stick as a replacement for traditional glue sticks in a glue gun, along with a custom-designed CNC-machined aluminum part to enhance the gripping force of the glue gun. This project is perfect for those who enjoy combining 3D printing with CNC machining, and it's a great way to give your glue gun a unique upgrade. Whether you're looking to experiment with alternative materials or just want a more robust tool, this project will guide you through the process step by step.

Glue Gun

Screwdriver

3D Printer (to print the PLA Sticks)

optional cnc machined part

Start by 3D printing the PLA stick using the provided STL file. After printing, allow the stick to cool and solidify. Insert it into the glue gun, heat the gun slightly above normal to account for PLA’s higher melting point, and test the stick’s functionality. You may notice the PLA stick is more rigid, requiring a bit more force to feed. Therefore we can exchange the part that pushes the PLA Stick with a CNC machined part in the next step.

With the glue gun unplugged and cooled, use a screwdriver to disassemble it. Replace the original feed mechanism with the CNC-machined aluminum part, which provides better grip on the PLA stick. Reassemble the glue gun, then test it again with the PLA stick. The enhanced gripping force should result in smoother feeding and improved performance.

The STL file for producing this part, which can be manufactured through services like PCBWay or JLCPCB, is attached.

After reassembling the glue gun, conduct a thorough test by extruding the PLA stick through the enhanced glue gun. Observe the consistency and ease of extrusion. This modified glue gun can serve as a simple extrusion mechanism for various applications, such as small-scale injection molding or repairing plastic parts by adding PLA directly to the damaged area.

Consider experimenting with different nozzle attachments or temperatures to optimize the performance for specific tasks. The versatility of this setup allows for creative use in DIY projects, prototype development, or quick repairs where traditional adhesives might not be suitable.