Plastic,Welding,Overview,Plast technology Plastic Welding Overview
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Plastic welding is the ability to take two pieces of plasticand weld them together. This is a type of weld that will be done on children'stoys, lawn furniture, automobile parts and other types of plastic equipmentthat you may use everyday or commercially. This type of welding is used to join thermoplastics whenthey are heated and under pressure. Generally the pieces are fused togetherwith filler material, but some instances do not require filler material. Plastic often has a shorter lifespan than most types ofproducts because there are so many things that can go into how it ismaintained. Elements from nature like cold weather, UV rays from the son orchemical contamination can create damage with plastic. Plastic can also receivedamage if it is hit hard like in a car bumper or other hard surface, but thepurchase of the new parts can be cost prohibitive; this is when it may be agood idea to repair it instead. There are different types of plastic so it is important toknow which one you are working with in order to make sure that the properwelding material is used. It is a good idea to understand the differencebetween thermoplastics and thermosets because thermosets cannot be welded. The type of plastic that needs repair will require differentwelding rods and if you use the wrong rod for the plastic you need to repair,there will be no bond. Materials like Polyolefines have a lower surface energyso this means they cannot usually be repaired with an adhesive or other typesof glue. There are a special group of polyolefine adhesives that can do thisjob. When you are making repairs on plastic there are usually twotypes that you will come up against -- you will either have to repair a crackor a broken part. If you find a crack, it means that there is some type ofstress affecting the inside of the material you are using. This means that youwill have to repair the crack and make sure it doesnt continue through thepiece. There are several types of plastic welding. A few of themare: · Hot gas welding uses a welding gun that haselectric heating elements within in it that produce a heat of hot gas. · Hot plate welding uses a hot plate between thetwo surfaces that are being joined. Ultrasonic welding uses a high frequencyacoustic vibration to weld the pieces together. These are placed under highpressure and then exposed to the vibrations until the weld is completed.· Spin welding where friction is used to weld twocylindrical parts as these parts are rotated. At a certain time the rotation stopsand the weld is completed. · Vibration welding takes to pieces of plastic andexposes them to a frequency called an amplitude. The two pieces are under pressure whichcauses a friction that generates heat. All of these types of welding work on plasticand they are geared towards working with a variety of polymers.
Plastic,Welding,Overview,Plast