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Supplying Science and Education Since 1957
Welding Plastics

Dynalab Corp custom plastic fabrication department machines products for use in laboratories, industry, education and even the home. The welding of plastics involves uniting softened surfaces of the same material normally using the aid of heating.

Welding of plastics is accomplished in three sequential stages:
    1. Surface preparation
    2. Application of heat and pressure during the weld
    3. Cooling

Our welding room employes many of the techniques listed below on a daily basis. From our popular dippers to spill containment trays, bottle carriers and various workstation storage bins welders are hard at work on Made in the USA plastic lab supplies!

Gun welding a spill containment tray
  Leak-proof Guarantee
Spark Testing Spill Containment Tray
Every spill containment tray that leaves our Rochester, NY plastic fabrication faciity is spark tested at 50,000 volts to ensure leak-proof seams.

Plastic Spill Containment TrayOur most common stock and custom welded item is the plastic spill containment tray. Seams of these trays are welded using various of the welding techniques below.

Custom Tray Quote ButtonWe stock a large range of sizes in a variety of materials. Custom quotes are available to meet your specific requirements.

The following are all welding techniques used in our custom plastic fabrication shop: 
Extrusion welding is ideal for larger welds in a single pass as it draws welding rod into a hand held plastic extruder that heads the material with hot air to allow bonding to take place.
Freehand welding uses heated welding rod and a jet of hot air on the weld area at the same time.
Heat sealing is the process of sealing one plastic to a similar plastic using heat and pressure.
Hot gas welding (also known as hot air welding) uses heated welding rod.
Injection welding is the same as extrusion welding.
Ultrasonic welding is the quickest welding procedure available. High frequency (15 kHz to 40 kHz) low amplitude vibration creates heat by way of friction between the materials to be welded.
Speed tip welding is similar to a soldering iron as the welder is fitted with a feed tube for the welding rod. The speed tip heats the rod while it is being pressed into the position being welded leaving a bead of softened plastic.
Spin welding is a form of frictional welding where one round piece is held still while a similar one is rotated at high speed the whole time being held lightly against the stationary piece.