Different Types of Plastic Welding

Plastic welding is the process of melting two pieces of plastic and joining them together. There are a variety of ways to weld plastic. These techniques often use gas and other dangerous equipment, and should only be done by a professional.

High Frequency

The use of electromagnetic waves to soften plastic for joining is called high frequency welding. Radio frequency is often used when a continuous and localized technique is required.

Ultrasonic

Ultrasonic also uses high frequency with low amplitude vibrations. According to Mark Williams, Quality Control Manager at Wilco Molding, the friction created by the vibrations heat and melt the plasti so that the two pieces can be joined together (see Resources).

Freehand

Freehand welding is a long and tedious process, but can be used to weld almost any project. The stream of hot air shoots down the molding rod and on the section to be welded. When the rod becomes soft, it is pushed into the area to be joined.

Hot Plate

Hot plate welding is often used for large pieces of plastic. A plate is placed between the two pieces until the area melts. The plastic is then joined together.

Hot Gas

A welding gun must be used to weld with hot gas. The hot gas travels through the gun, is heated by electric elements within the gun, and streamed over the area to be welded. Once the plastic begins to melt, the pieces are joined together.

Resources

• Wilco Plastics
• Plastic welding tools and supplies