Repairing broken plastic items can seem daunting, but with the right techniques, it’s easier than you might think. Whether you have a cracked toy, a damaged appliance, or a broken household item, there are several effective methods to fix hard plastic and restore it to its original condition. In this article, we’ll explore five easy ways to repair hard plastic and become a #repairhero in your own right.
1. Plastic Welding with Heat
Plastic welding is a great technique for joining separate pieces of plastic or mending cracks. Using a low-wattage soldering iron, you can melt the edges of the plastic until they blend together, creating a strong bond. For added strength, you can melt additional plastic into the groove to reinforce the joint.
It’s important to note that melting plastic can release toxic fumes, so be sure to work in a well-ventilated area and take proper safety precautions.
2. Plastic Welding with Friction
Friction welding is another effective method for joining plastic pieces. By spinning a small bit of plastic (such as a segment of 3D printing filament) at high RPM and pressing it against the intended joint, the friction melts the plastic, creating a sturdy bond between the two surfaces.
This technique is particularly useful for repairing 3D printer misprints, as you can use the same filament material to ensure a perfect match.
3. Using Acetone for ABS Plastic
Acetone is a solvent that works well for melting and bonding ABS plastics. 3D printing enthusiasts often use acetone to smooth surfaces, bond pieces together, and troubleshoot misprints. By creating a mixture of acetone and ABS, known as ABS slurry, you can use it as a glue or filler to smooth grooves and fill gaps.
It’s important to note that this method is not suitable for PLA plastics.
4. Plastic Patches
If you have a large hole in your plastic item, creating a plastic patch is a viable solution. Using a heat gun, soften the edges of the hole and the plastic you’ll be using as a patch. Carefully place the patch over the hole, ensuring it covers the entire area. Use a hot metal spoon or trowel to smooth the edges for a seamless finish.
Be sure to use the same type of plastic for your patch to ensure compatibility.
5. Good Old Glue
If you prefer a more straightforward approach, using glue is always an option. For plastic repairs, super glue (cyanoacrylate) or plastic model glue are the best choices. These adhesives form a strong bond that can withstand wear and tear.