We had a need for a magnet board design that was nice to look at, easy to build, and relatively inexpensive. Specifically, we needed it for our Disc Mounts which we created to store and display our CDs around the gaming zone. Learn more on our Disc Mount Project Page. We also used it for our 3D Super Mario Papercraft Magnet Board instructable so we could build, mix, and mash up scenes from the game.
This instructable shows you how to build a magnet board using a 24 x 36 in. plastic poster frame. These frames are inexpensive, fit common poster sizes, and single tin sheet usually can be purchased in this size. You can scale the design up or down for other sizes of frames as desired.
Step 1: Get Parts and Materials
Parts and Materials
- 1, poster frame with an acrylic face (24 x 36 in.)
- 1, cool poster/picture (24 x 36 in.)
- 1, flat sheet of galvanized tin (24 x 36 in., 24 - 30 gauge )
- neodymium magnets (between 1 - 2 lbs pull force)
- 1, roll masking tape (1" wide)
- leather work gloves to handle tin
- hot glue or white glue
- tin snips (unneeded if tin is correct size)
- tape measure (unneeded if tin is correct size)
- straight edge (unneeded if tin is correct size)
- marking pen (unneeded if tin is correct size)
- hammer and block of wood (not pictured, unneeded if tin is correct size)
About The Tin Sheet: Magnets will not stick to aluminum, copper, brass, etc. The sheet can be smaller than the frame. 30 gauge sheet can usually be found at building supply stores in sections that carry heat , ventilation, and air conditioning ducting. Otherwise, suppliers of sheet metal in your industrial districts will usually cut you a piece to size. Bring your gloves to handle it.
Be aware that safety is your responsibility. Please read our Safety Warning and Disclaimer before you start.
Step 2: Remove Frame Backing
Step 3: Cut Tin to Size
If I have to cut the tin, I like to make it smaller than the backing by at least 1" on a side. Smaller is fine since we are going to position and tape the tin to the backing in the next step. Let's cut it! (You are wearing gloves, right?)
(1) Prepare tin:
Lay the tin flat on a durable work surface (tin will scratch surfaces). (See picture.)
(2) Measure and Mark:
Use the tape measure and straight edge to mark lines where you need to cut. (See picture.)
(3) Cut it:
Pick up one side of the tin with one hand and start cutting with the other using the tin snips. If you are not familiar cutting with tin snips, there is a nice explanation at eHow: How to Cut With Tin Snips The cut doesn't have to be perfect, just close. (See picture.)
(4) Inspect the Cuts:
Tin snips can make sharp pointy spikes along the edges. Look at your cut. If you find any of these then use a hammer and scrap piece of wood to flatten them down. (See picture.)
Step 4: Attach Tin to Backing
Place and center the tin on the backing. Use small pieces of tape to make it easy to handle and place. Note: it is handy to have your lab/shop/studio assistant hand you pieces of tape since you will be wearing gloves. Let's tape:
(1) Side one
Starting with a long side, rip off a 6-8" piece of tape and overlap it evenly on the tin and backing. Continue down the side, overlapping each piece of tape as you go. (See picture.)
(2) Make sure tin is flat
Make sure the tin does not form any ripples by putting light pressure on the tin and run your "gloved" hand across it from the side we taped. (See picture.)
(3) Side two
Tape up the opposite side just as you did with side one. Always check that the tin stays flat. (See picture.)
(4) Side three and four
Tape up the last two sides as you did with side one. Always check that the tin stays flat. (See picture.)
Note: If your tin fits perfectly into the frame (24 x 36 in. in this case) you will follow the same procedure except that your tape will overlap around the edge of the backing. (See picture.)
Step 5: Reinforce Hanger
(1) Prep Tools and Materials
Get your hot glue gun ready (or white glue).
(2) Position the hanger
If needed, bend the hanger into position. Allow enough room for a screw to slide under it.
(3) Apply Glue
Apply the glue liberally around the bracket as shown. make sure to get all sides of the hanger covered, but do not fill in the gap where the screw will go.
Let it dry thoroughly to form a strong, hard bond around the hanger.
Step 6: Reassemble Frame
Step 7: Hang It Up
Bare magnets (nothing between the magnet and the acrylic face) will scratch the acrylic over time. It is not very noticeable in my opinion. However, if you are concerned about this do one of the following:
- Glue vinyl to the back of your magnets (usually found at fabric stores)
- Stick vinyl inkjet stickers to the back of your magnets (usually found at office supply stores)