1.3 pick up the foam.

How to cut foam straight. Horizontal cutting refers to when the knife is horizontal, and typically slices blocks of foam into thinner sheets. Scoop enough foam to fit comfortably in your hand and hold it between your fingers, so there are at least three fingers exposed. Demonstration of how to cut upholstery foam with an electric knife.

Cutting through both thin and thick foam board works best when the cuts are straight lines. It can be used to cut a new channel. This foam cutting saw has a base that rides on tiny wheels to prevent friction, and the large area of the base keeps the blade straight up and down.

Lay a sheet of polyurethane foam on a pad. Hold the knife blade parallel to the upholstery foam and make a deliberate, shallow cut along the entire line — in one direction. You shouldn’t have to saw the material.

The slower you pass the knife through the foam, the more control you maintain. Look for a thick foam with a long life; It shouldn’t be for you, too,.

Place the straight edge along the mowing line and, holding the knife carefully at. Lay the blunt side of the knife directly above a part. Enter the foam from an outside edge and do not stop.

When cutting, use firm, steady pressure and cut in one smooth motion. The most important thing to. The best way to avoid this is placing a straight edge along your cutting line and applying pressure as you make your cut.