Zipper disconnection can be repaired by the following methods:
Repair with pliers and hammer First, use pliers to clamp the broken section of the zipper. Then, gently tap the pliers with a hammer to rejoin the two broken pieces of the zipper. Be careful not to damage the zipper.
Using a zipper changer If the zipper breaks beyond repair, you can use a zipper changer. First, find a suitable zipper changer and install it on the zipper where it breaks. Next, press down firmly on the zipper changer so that it holds the break together. Finally, pull the zipper a few times to make sure the changer is secure.
Using a Sewing Machine If the break in the zipper is long, you can use a sewing machine to repair it. First, secure the fabric on both sides of the zipper with clips to ensure it doesn't move. Then, use a sewing machine to sew the broken parts of the zipper. Pay attention to controlling the speed and strength of the sewing machine to prevent the zipper from breaking or being damaged.
Hand-stitched repairs If you don’t have a sewing machine, you can also make repairs by hand. First, pin and thread the fabric on both sides of the zipper so it won't move. Then, using a needle and thread, start from one side of the zipper and sew along the break. Keep the tension on the thread while sewing so that the zipper can return to normal use.
Replacing the zipper If the above methods cannot repair it, or the zipper has been excessively worn, you may consider replacing the zipper. First, find a zipper that fits and buy it. Then, use scissors to cut the original zipper and place the new zipper in the broken position. Finally, attach the new zipper to the garment using a sewing machine or by hand.
To sum up, when a zipper breaks, you can try to repair it with pliers and hammer, use a zipper changer, repair it with a sewing machine, repair it by hand stitching, or replace the zipper. Choose the appropriate repair method according to the situation, and pay attention to the strength and speed of the operation to ensure the repair effect and the life of the zipper.