How do you cut a Styrofoam ball in half?

Asked By: Mercedes Bag | Last Updated: 26th February, 2020
Category: hobbies and interests needlework
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Divide round styrofoam balls by cutting them down the middle. You can cut a round styrofoam ball in half by tracing a line along its equator with a sharp pencil. Many styrofoam balls already have this line marked by the manufacturer. Use a sharp blade, a hot wire cutter, or an electric knife to bisect the ball.

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Similarly, what is the best way to cut Styrofoam?


  1. Score the Styrofoam to create a clean break line.
  2. Use a waxed serrated kitchen knife to cut Styrofoam.
  3. Cut polystyrene foam with an electric kitchen knife.
  4. Use a craft knife to cut Styrofoam.
  5. Use a hand saw to cut Styrofoam.
  6. Cut Styrofoam with power saws.
  7. Utilize a hot wire cutter.

One may also ask, how do you smooth Styrofoam? Styrofoam™ brand foam acts like fine sandpaper when rubbed together. For smooth, rounded edges, rub two pieces of Styrofoam™ brand foam together. To shape larger pieces, cut out the basic shape and then sand the final details into the shape.

Similarly one may ask, how do you cut a hole in a Styrofoam ball?

  1. Place a Styrofoam ball on a newspaper-covered work surface. Measure and mark the area that needs to be cut or removed with an ink pen or marker.
  2. Cut a small area on the ball with the sharp knife.
  3. Cut the measured marks on a larger Styrofoam ball with the sharp knife.
  4. Pick up a piece of florist wire in gloved hands.

What is the best tool to cut Styrofoam?

Cut channels in the styrofoam using a bladed tool. A long, serrated knife or an electric knife is probably best for cutting channels through your styrofoam.

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Is cutting Styrofoam toxic?

You can call our toll free number at 1-866-735-9255 and we can give you the tech-support number for DOW which manufactures Styrofoam. They told us that the fumes from cutting their foam with a hot wire are not toxic, but cutting should still be done in a well-ventilated area.

What is the best tool to cut foam board?

The 5 Best Tools for Cutting Foam Board
  1. Long Bladed Utility Knife – Our Preferred Way. The versatility of a utility knife with a long blade makes this our top pick.
  2. A Hot Knife. When a standard knife won't cut it, you might need some power.
  3. X-Acto Knife.
  4. Hot Wire Cutter.
  5. Foam Cutting Saw.

Does heat melt Styrofoam?

Styrofoam is made of polystyrene beads. Polystyrene melts at 240 Celsius (464 Fahrenheit). Styrofoam is made of polystyrene beads. Polystyrene melts at 240 Celsius (464 Fahrenheit).

Is foam board easy to cut?

Use scissors to cut through soft foam.
To cut thin or flexible foam, get out a pair of heavy-duty scissors. You can cut curves or straight lines, but you may want to lightly draw your design on the foam with a permanent marker before you begin cutting. Make long smooth cuts so you don't get choppy edges in the foam.

How do you shape polystyrene?

Styrofoam is one of the easiest materials to shape by normal means e.g. slicing with sharp knives or a hot-wire cutter, sawing with serrated blades, rasping with files, and smoothing with sandpaper. The real challenge lies in controlling the shape and especially, in this case, how one achieves concave forms.

How do you cut extruded polystyrene?

  1. Measure your cut with a straightedge ruler. If you're cutting the rigid foam for a specific project, measure the length and width you will need it to be.
  2. Mark your cutting line on the foam with a permanent marker.
  3. Lay the rigid foam insulation on a flat surface.
  4. Clamp the rigid foam to the flat surface.

Can you cut polystyrene with a table saw?

Re: Cutting polystyrene board
If you slow down, or stop, you get a wider cut as the heat has more time to work against the foam. You get a faster, cleaner cut with the table saw.

How do you make a Styrofoam ball with Earth's layers?

Glue a Styrofoam semicircle onto the ball.
Take the half of the ball you're not using. Cut out a section from the middle, in a semicircular shape. Glue this to the center of the half-Earth, so there's a bump coming out of it. This is the inner core, a solid ball formed from the pressure of the layers around it.

How do you make Styrofoam balls smaller?

Place the styrofoam pieces on the cookie sheet and bake for about five minutes. Different styrofoam may shrink differently, so monitor the styrofoam closely during this time. It will curl up as it shrinks, and then flatten back down when it's done. Once the shapes flatten, remove from the oven.

How do you seal styrofoam before painting?

You can use a regular craft sealant such as Mod Podge, or you can target the styrofoam specifically and use something like Foam Finish. Apply the sealant using a foam brush or regular paint brush and then let it dry completely before painting the styrofoam.

Will spray adhesive melt Styrofoam?

If the glue does not say whether or not it is safe to use on Styrofoam, you might want to test it first. Some aerosol-based products, such as spray paint, can actually melt or dissolve Styrofoam. Because spray adhesives tend to be low-tack, it is best to use them when attaching large blocks of Styrofoam together.

Can you use Mod Podge on Styrofoam?

Yes, mod podge can be used over styrofoam. It doesn't really do much on it's own to add strength.

Can you mold Styrofoam?

If you wish to make a mold for use in producing several copies of an item, polystyrene is an easy material to work with. There are two basic methods for creating a polystyrene mold. You can carve it by hand, or you can liquefy it and pour it into a mold box.

Can you sand expanding foam?

Sand Area. Use sandpaper to sand the foam and give a smooth finish. The expanding foam can now be plastered or painted over.