Seldom is welding used to join polycarbonates because the degree of success has never been constant.
How to weld acrylic sheets.
Put the acrylic on the edge where you want it and place the needle of the glue filled applicator where the two pieces meet.
Move the tip of the welding gun slowly over the plastic for a speed weld.
Use a needle nose application bottle to apply the acrylic cement to the acrylic sheets.
Capillary action will draw the glue into the joint.
Any of the two types of welding vibration welding and ultrasonic welding are used and the results depend on the shape and thickness of the sheets to be bonded.
Use clamps or masking tape to hold acrylic sheeting in place while applying solvent.
You can use a thinner to thin the mixture to create minimal brush marks.
The cement will begin to dissolve the acrylic and form a strong bond immediately.
Plexiglass sheets are acrylic or plastic sheets which are see through in nature these are used instead of glass sheets as they are light and shatter resistant.
Lightly squeeze the applicator while pulling it toward you.
However since this method is used this blog mentions it too.
If acrylic sheeting is being welded for box corner joints apply solvent on the inside edge of the acrylic sheeting.
Hold the gun downward at about a 45 degree angle touching the edge of the nozzle to the plastic.
Then heat the plastic until you see it beginning to melt.
To glue acrylic with solvent glue typically a squeeze bottle applicator with a needle tip is used.
Allow the coating to fully dry.
Start at the top of the crack or area you wish to join.
Apply the desired amount of acrylic fluid medium inside the tape using a one half to two inch soft artist brush.
It is also very economical and useful.
To weld two sheets of plexiglass we need to use plexiglass solvent.