Plastic Welding Gun

Oct 3, 2011

Introduction to Plastic Welding

Plastic welding and spot welding – both are almost similar to each other. There is a difference noted. In plastic welding, heat is supplied through convection of the pincher tips, instead of conduction. The two plastic pieces are brought together. At the time of welding, a jet of hot air is liberated. This melts the parts to be joined along with the plastic filler rod. As the rod starts melting, it is forced into the joint and causes the fusion of the parts.

Plastic identification is the first point to be noted in order to choose a suitable plastic welding rod. A plastic welding rod or thermoplastic welding rod is of a constant cross-section shape. Using this, two plastic pieces can be joined. It may have a circular or triangular cross-section. Porosity of the plastic welding rod is an important factor. Air bubbles in the rod will be created due to its high porosity. This is responsible for decreasing the quality of the welding. So, the rods used must maintain zero porosity. Otherwise, they should be void less. Products like chemical tanks, water tanks, heat exchangers and plumbing fittings are manufactured by using the technique of plastic welding. By adopting this technique, money can be saved.

Using plastic welding, two plastics can be welded together. This type of weld is performed on children’s toys, lawn furniture, auto parts and other plastic equipments which are used daily – both for domestic and commercial purposes. In order to join the thermoplastics, when they are heated an under a particular pressure, this type of welding is employed. In normal practice, using filler material, the pieces are joined together. There are certain occasions wherein filler material can be avoided. Generally, plastic is not durable and has a shorter life span. Natural elements like cold weather, ultraviolet radiation from the sun or continuous exposure to chemicals causing contamination, will create damage to plastic products. Plastic can be subjected to damage if it is hit on a hard surface. But, as the price of new parts is high, it is preferred to repair the existing products.

As there are different types of plastics, we must know which one we are working with in order to find the exact welding material to be used. We must know the difference between thermoplastics and thermo sets because it is not possible to weld thermo sets. If you use the wrong welding rod for the plastic to be repaired, bonding will not take place. As materials like polyolefin’s have a lower surface energy, a special group of polyolefin adhesives has to be used. When you are repairing plastic, there are usually two types of defects – a crack or a broken part. In the case of a crack, there is a particular stress affecting the inside of the material. You have to repair the crack and you should not continue through the piece.

There are many types of plastic welding.

  • Hot gas welding uses a welding gun which has electric heating elements. They produce heat f hot gas.
  • Hot plastic welding uses a hot plate place between the two surfaces which are to be joined. In order to weld two pieces, ultrasonic welding uses a high frequency acoustic vibration. After subjecting them to high pressure, they are exposed to the vibrations until the weld is completed.
  • Spin welding, where friction is employed to weld two cylindrical parts. These parts are rotated. The rotation stops at a particular point and the weld is completed.
  • Vibration welding exposes the pieces to a frequency called amplitude. The two pieces are subjected to pressure due to which a friction is created which generates heat.

About the Author

Brayan Peter is an expert author for Welder, Plasma Cutter,Plasma Cutting Machine, Tig Welding. He written many articles like Welders, Plasma Cutters, Welding Equipment, Arc Welder, MIG Welder, Welding Machines, Diesel Generators, Welding Helmets . For more information visit our site http://www.everlastgenerators.com. Contact him at weldings.info@gmail.com


Huhushop(TM) 110V Hot Air Torch Plastic Welding Gun Welder Pistol 1500W+ 2pcs Speed Nozzle +roller Free Ship via DHL


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$110.39


New Plastic welding Gun /Plastic welder /Hot Air Gun /Hot gas welding 1500watt heavy duty

Comes complete with a SPARE HEATING LEMENT, a 6mm Pencil Tip Nozzle ,a Flat tip,

1X Triangle Speed Welding Nozzle, 1X Round Speed Welding Nozzle, 1x Pressure Silicon Roller

some PE plastic rod, some PVC plastic rod,an English manual

3 year warranty

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  Specification: Rated Voltage: 110V/60HZ Max Power:1500w (Much stronger than 1000w devices) Heating power adjustable from 80~1500W Temperature Scope:40 – 700°C (100-1290°F) Insulating Intensity:3750V Air Volume:13.8m/h Air Pressure:3000Pa Outside Package Dimensions: 39x13x11cm Description : This is a plastic welding technique which is analogous to gas welding of metals, though the specific…







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1500W Adjustable Plastic Hot Air Torch This welding gun can be used in a variety of applications including forming, bending and coupling of Thermoplasic components, plastic fabrication, roof membrane welding, welding fabrics, vehicle fairing repairs, shrinking. It is also used for forming tiles, sheets, skirting boards, couners and stair edging as well as for rapid drying of adhesives. The scope o…

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When talking about welding most people naturally tend to think of steel. However, though relatively less heard of, plastic welding is used in a lot of industries.

This is a plastic welding technique which is analogous to gas welding of metals, though the specific techniques are different.

This specially designed heat gun (hot air welder) produces a jet of hot air that softens the parts to be…








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