Seldom is welding used to join polycarbonates because the degree of success has never been constant.
How to weld acrylic sheets.
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.
You can use a thinner to thin the mixture to create minimal brush marks.
Use masking tape on the glass to tape out the desired size and shape of the acrylic sheet.
It is also very economical and useful.
However since this method is used this blog mentions it too.
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.
To glue two pieces of acrylic together you must secure both sheets with a clamp or have an assistant hold them together so that they fit perfectly while you apply the solvent.
Use a needle nose application bottle to apply the acrylic cement to the acrylic sheets.
Allow the coating to fully dry.
Start at the top of the crack or area you wish to join.
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.
If acrylic sheeting is being welded for box corner joints apply solvent on the inside edge of the acrylic sheeting.
The cement will begin to dissolve the acrylic and form a strong bond immediately.
Lightly squeeze the applicator while pulling it toward you.
To glue acrylic with solvent glue typically a squeeze bottle applicator with a needle tip is used.
Use clamps or masking tape to hold acrylic sheeting in place while applying solvent.
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.
Apply the desired amount of acrylic fluid medium inside the tape using a one half to two inch soft artist brush.