The front bumper of the car is a plastic weldable plastic welding adopts a heating method to melt the contact surface of two plastic parts at the same time, so that they are combined into a whole connection method;
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2, it can use welding rod or no welding rod, the use of welding rod, need to be welded end face made into a fixed shape (such as U, X, etc.) of the joint, the welding rod melt drops full seam, two welded parts into one; When no electrode is used, the welding surface is heated and melted, and then vertical pressure is applied to the welded surface until it is tightly fused into one body;
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3, plastic welding, hot plate machine, rotary melting machine according to the different heating softening methods used, plastic welding methods can be divided into softening by external heat source, softening by mechanical movement, and softening by electromagnetic action.
See what material your bumper is and then make a decision there are iron welding, copper welding, aluminum welding, plastic welding to see what material you decide! Yes, a plastic torch and a plastic electrode, FRP bumpers can't be welded yes, car beauty shops have plastic torch, they can do it you can use a plastic torch welding material is plastic welding rod some fiberglass, with fiberglass and curing agent
Now the general car bumper material is polypropylene (pp). So should the BMW's bumper. In fact, when it comes to repair, 4s shops are basically only for repair, but in fact, it is not impossible to repair. Potholes, breaks, breakage can be repaired. Because polypropylene is a type of plastic. As long as the technology passes, a plastic welding torch, one or two welding rods can be done. Of course, the restoration will have to be spray-painted with putty screed.
BMW's original parts are very expensive, if not badly damaged, it is better to repair them. Even if there is insurance, if it is only a small problem of the bumper, it is necessary to consider the issue of insurance renewal after the claim is not. 4s shop does not repair can find a larger repair shop.
It's not a big deal. Of course, you don't have to fix it yourself.