Plastic welding takes place in different sectors of the economy. The technique involves the fusion of two or more pieces of thermoplastics. It generally involves four stages. The first is surface preparation where the parts to be joined are cleaned. The second is application of heat. A hot air welder or heat gun is used to apply heat. The third stage is applying pressure on the heated surface so as to join them together. The final stage is cooling which allows the two surfaces to bond firmly. The following are some application of the welding technique:
Consumer Products
Welding of plastic will feature a lot in the consumer sector. It will be seen in the domestic as well as commercial sector. Individuals apply the technique when joining PVC, repairing water tanks, serving utensils, cups, bowls, toys, juice boxes, water bottles, electronic devices such as radios and microphones and much more. The type of weld will be influenced by nature of product, user’s skill and use.
Automotive
Plastic plays an integral role in the modern car. In fact, more plastic is being fitted into the cars. This is credited to affordability, easily available, and user-friendly. It is not only used in the car’s interior but also to make vehicle accessories. Areas of use include fittings, console, handles, filter housings, fender, seat covers, lens housing, decorative strips, wheel caps, dashboard (fascia) and other areas.
Medical
The medical sector also uses plastic welding a lot. Reason for this is because of the wide use of plastic in various sectors. Plastic comes with a variety of advantages. These include hygienic, flexible, versatile, easy to clean and sanitize, malleable and easy to mold. Welding is used when an item made from plastic breaks or requires to be extended. Common uses include tubing, laboratory equipment, breathing aids, surgical instruments, PVC covers and more.
Fabric and Film
Plastic features as one of the popular fabrics used today. It is well-liked by many people due to ease of cleaning, pocket-friendly, resistant to the elements, strong and durable. Polyvinyl chloride (PVC), heavy duty plastic, polymer, Perspex are some of the types Films are also made from plastic and will require joining from time to time. Notable users are tent making, clamshell packaging, polymer clothing, shower curtains, roofing, filters, and canvas among others.
Military
The military and law enforcement will also weld their equipment and accessories. Due to the versatility of the welding equipment, they may do it at base or in the field. Usually, heavy plastic requires more heat and skill compared to light plastic. Also, it may take longer to cool hence a bit of patience is needed. Common items include guns, tents, grenade components, helmets, radio housing, camouflage, and much more.
Several factors need to be considered when planning to weld plastic. The first is the type of material whether soft, hard, PVC, or fabric. The second is the nature of finishing; finished or semi-finished plastic. The third is the intended use; ornamental or functional. The final consideration is the suitability of the technique. Common types of plastic welding include hot gas, extrusion, speed tip, hot plate, high frequency, injection, contact, ultrasonic, solvent, friction, laser, and more.