Plastic weld bumper crack

Next, v-groove along the crack line with the tapered burr. Aim the flow of air at the intersection of the rod and the plastic that you are welding. Be sure to melt both the rod and the existing plastic. On this particular weld, we are doing two passes with the rod.

While the plastic is still hot, use the airless plastic welder to smooth the weld. To better distribute the bending forces on this bumper cover, lay down several passes of the polypropylene strip on the backside for reinforcement.

Again, while the plastic is still hot, use the airless plastic welder to smooth the weld. Allow the weld to cool completely before starting on the front side.

Remove the aluminum body tape and use a tapered burr to ground a V groove along the crack line. Grind deep enough that you can see the weld of the backside. Once the weld has cooled, you can sand the weld smooth. As you can see, the bending forces are no longer concentrated to the crack line, but are spread over a large area. Voiceover: Rachel Moore Always wear proper safety gear while working!

Aluminum Body Tape several options available Tapered Burr Nitrogen Plastic Welder several options available Polypropylene welding rods Note: We used polypropylene here because of the identification symbol. Choose the rod that matches the plastic you need for your repair. Click on the CC button to turn them on or off. The length of this video is in no way representative of the actual time required to perform a complete repair and therefore should not be used for estimating purposes.

English Transcript: Many bumper covers have built-in stress areas that typically break in the same area, and often break without much force. Products Used. Work in a well-ventilated, protected area. Prepare surfaces. Prepare adhesive and activator if applicable. Apply activator if applicable. Apply adhesive. The Bumper is Cracked If the bumper on the car is cracked, it typically needs to be replaced, rather than repaired. There are a few exceptions to this, as epoxy and a fiberglass repair kit can be used to repair a bumper.

But, for the most part, you want to have it replaced. Plastic repair materials should be used when performing repairs on bumper covers. These materials or adhesives, are two-part epoxies, urethanes, or acrylics. All these products are designed to move with the bumper so the material does not crack.

Filler is a widely used in the production process of plastic products. Filler is used to change the properties of the original plastic. By using plastic filler, manufacturers can save production costs as well as raw materials.

You can do it by yourself! As a matter of fact, repairing a cracked bumper is way easier and simpler than you think. There are three DIY approaches that you can use to restore your bumper to its former condition. Clean repair area of dirt, grease, oil, paint, rust, etc.

After removing the replaceable cap, press down on plunger and squeeze equal amounts onto a disposable surface and mix thoroughly. Apply with appropriate tool in an even coat, weld bead or extruded shape as needed.

Set in 5 minutes. Gorilla Glue will work well on many types of plastic; however, we do not recommend for use on polypropylene PP or polyethylene PE plastics or any type of rubber with high oil or plasticizer content. J-B Weld is not designed for some types of plastic, but the company makes many other epoxies designed for specific situations involving many types of plastic.

Sand the surface to be glued. Mix the two glue components together if required.