Plan on making three passes with the knife to get a thorough and clean cut. Use cable ties, twist ties or string to keep the wire close to the frame so it won't get in the way when you're using the tool. Cut the unmounted side of the split to about one foot. Source(s): I'm an electrician. on Step 15. You need room between the washers so you can put your wire in there. Stinky, but pretty efficient. Don't tape over the gaps, they provide ventillation. Using hot glue, paste the sticks on both the battery terminal. Even if it would work you’d struggle to get sufficient power to melt such a dense material so quickly. 3 months ago As the wire is passed through the material (workpiece) to be cut, the heat from the wire vaporizes the material just in advance of contact. The uses for computer power supplies are nearly endless. There are a lot of alternatives listed or linked below for the frame, the transformer, the wire, the enclosure, and the heat control. Buy the High-frequency ,switching type of transformer is NOT compatible with messing with the input voltage. The Corner was painted, Black by a Spray Paint. Now to check the closet for my used guitar strings. Im not sure how long the 25v transformer will last but it is cheap enough to give a try. 0 0. 3 Tools In 1: Cut or Engrave Foam Complete Tool Set. The arm is a semi rigid spring steel 90 degree bend that bends down to accept the wire and rebounds to apply tension. I read this article in order to learn what kind of power source I needed to make a hot wire foam cutter. I used my cutting board to make sure my lines were straight and square. It's ok if the tensioning loop is a little floppy at this point. Click “edit tools” if you have a Cricut Maker and pick the knife blade. Reply 2 years ago. Foam board as in Foamcore? Bend the bare wire of the extension cord (the part you just strippeed) into a U shape, and hook it around the screw between the two washers. I finally got some 22 gauge nichrome wire. I use a hot knife to cut the Styrofoam cement forms in basements for installing the electrical circuits. Make Gandalf's white staff . No. ; Cut a small area on the ball with the sharp knife. Measure and mark the area that needs to be cut or removed with an ink pen or marker. Mark the length and depth of the channel on your styrofoam, then punch your blade through the styrofoam to the depth you marked. I should have used the 11V (it had 11, 24 and 44V) tap and varied that or just use the proper transformer. Reply The wire was stretched to keep the tension on the wire so that it won't get deformed while cutting. also there is usually lots of mica heat board in there too , good to act as insulated guides for the wire as well, http://www.hhhh.org/~joeboy/resources/hotwire_foam_cutter/hotwire_foam_cutter.html, http://members.fortunecity.co.uk/slmohr/rcinterest2.htm, http://www.vatsaas.org/rtv/construction/hotwirecutter.aspx, How to Make Charcuterie Boards Using Clear Acrylic Templates. Two CD cases are openned to right angles, then pushed together to make 4 walls. Use screws to attach the top to the rails. First, cut off each end of your 12 foot extension cord. Try playing with the dimmer switch setting to get the best cut. So I drilled some holes using a 3 mm Drill bit.I used my Black and Decker Drill Cordless drill for that. Then measure and cut 2 pieces of 2×4 to make leg rails. Step 2 Score a Styrofoam sheet along the desired cutting line. You can always add more if it seems too floppy when you try to make your cuts. Perfect Mini Electric Hot Foam Cutter 3 in 1 Kit - Guritta Hot Wire Styrofoam Cutting Knife, Heated Foam Carving Sculpting Tool, 100-240V Stainless Steel Wire Bowl Cutting Pen Engraver Tips. No. 0 0. brumfield. KD-5H Hot Knife is a professional hand operated tool to cut Styrofoam and similar kind of materials and can be used for packing, building, Sculpture…. Repeat with another string for the other side, but when you tie off the string at the top of the leg this time, make sure you have some tension. Maybe that's what's going on - a 44 watt light bulb would be plenty hot. Good question. Using mini drill, make holes at the marked point on both the ice cream sticks. Now Nichrome has a resistivity ranging from 1.10 × 10−6 Ωm to 1.50 × 10−6 Ωm.and a very high boiling point (~1400 °C). $23.99 $ 23. Cuts styrofoam for surfboards, model plane wings, sculpture, model train or tabletop wargame terrain, 3D sign letters, mold models for lost foam casting, etc.5/17/2007, Important note! Plug the charger into the outlet. Basically just the tip each pass and make multiple passes. I first fixe the 12 " pipe and 4" pipe using the corner Connector.Then I connected one end of the 12 " pipe to the table mount. The 3-Inch Hot Knife will cut better because it gets hotter.. Measure and cut the pegboard to make a tabletop. They also rectified the AC to DC to make it a lot safer for the end user as I was touching the wire more than once. Use a craft knife to cut Styrofoam. blade on this hot knife quickly heats to 975° F to make fast, clean cuts in foam and plastic materials. You can learn a lot from Instructables Classes about Designing in their class. Some Projects you can make that use a Hot Wire foam Cutter. Slowly advance the dimmer switch until the wire becomes hot enough to melt the foam. Cut a smooth, even line slowly. A piece of wooden dowel or stiff plastic rod about one foot long (not shown). on Introduction. The principle is quite simple, there is a strong electric current in a thin resistive wire. Keep the loop pretty close to the nut or there will be too much twisting force on the leg when the wire is tensioned. Those are generally not useful for cutting wings or slicing chunks off larger pieces. they are cheap and light . I think around $1? For the straight edges, I put it on a flat surface and ran the hot knife right along the edge of a metal ruler. Crude oil is a highly toxic substance that can be and is refined into literally thousands of other highly toxic, cancer-causing chemicals which are very poisonous. Lv 7. Utility knife. Make a waterfall for a … This worked, but the guitar string broke after about 30 seconds. 2 wooden yard sticks from the Home Depot paint department, $.97 each 3. Nice construction, the spring is a great idea. It can be kind of floppy when plucked but should be pretty much straight when at rest. Pluck the wire and listen for a musical tone. Nibble or cut a hole for the dimmer switch and tape it in. Woodland Scenics Hot Wire Foam Cutter . Make a sort of a big H shape out of your pieces by bolting them loosely together with the machine screws. One the remaining, uncut yardstick, drill a hole about 6 inches from the pre-existing hole (see photo), and another about 1 inch from the other end (not shown in this photo, but visible in later steps). Did you make this project? How to build a foam cutting table the simple way... to cut foam, styrofoam or plastic. The Wire was then mounted with a spring to the eye hook. Insert a ruler or dowel in the tesioning loop and twist it until it seems to be getting a little tight. I want to cut a lead block by using the hot wire process. The bottom will touch two opposite walls and there will be gaps under the other walls. They work very well. Insert a ruler or dowel in the tesioning loop and twist it until it seems to be getting a little tight. Utility knife 2. Put the nut on, but don't tighten it down at all. Share it with us! Answer 6. Cut polystyrene foam with an electric kitchen knife. Railroad Rail Lantern / Sign Stand Split With Axe. Model airplane hobbyists often make smooth cuts in polystyrene foam. I know this is some old commentary, but I wanted to correct some mis-information. I also believe that there is a NACA database you can use to find airfoil shapes from which you can create masonite templates to use as guides for your hot wire for smooth accurate wings. Then here is a simple tool mod you can do, turn an old soldering iron and a x-acto blade into a Hot Knife!This hot knife idea isn't really mine, I found this idea made by somebod… You can get these individually at a music store or you can use either of the 2 smallest strings from a packaged set. I used 200 lb dacron kite line. 95. Or is it the same answer as above, whereas you can use a hot knife or hot wire for both open and closed cell. Maybe you could make a version without a top and bottom, put some nice photos in it, and set a small plant pot inside with the plant sticking out? The HWS250 styrofoam cutter has proved itself to be an indispensable tool on the construction site , in the design studio , with model making masters, and for a range of hobbies and pastimes. WINONS Hot Knife Foam Cutter, WFC-0001 Styrofoam Cutter Same as a Hot Wire Foam Cutter, Electric Carving Knife-Kit of 3 Tools . Lastly, I added some rubber feet so that this won't scratch the table when used on it. The reality is not so simple, though. Hey Guys, It has been a long time I have not written an instructable.In this instructable, I will show you how to make a StyroFoam Cutter using things that are lying in your home. If the pieces do not, use the utility knife to cut deeper into the styrofoam. Variable 1-24V worked great but it died after about 5 minutes on 12V. It's the dumb way to cut foam. I've read that cutting slower and cooler makes a smoother cut. Strip the insulation off the last inch of one end of one wire of the cord. 3 years ago. Take a moment to look over your creation and make sure all the wiring seems to make sense. Always suit up and wear a disposable protective suit and cover your head/hair and wear disposable gloves when working with Styrofoam (EPS foam). Have fun DIYing! Cut a block of Styrofoam with a serrated knife into a piece that is as tall and as wide as you want the staircase to be. Even a 6V lantern battery straight wired to cutter generated enough heat to slice the foam. Then connect up all the wiring according to the diagram in the previous step, tape in the transformer, and tape the top on. 1 decade ago. This is the leg that is on the other side of the H from the handle. So, the length of the loop when taut should be about the same as the distance between the bolts. The idea of a dimmer and transformer didn't make sense to me and didn't work for a lot of people, so I went with a car battery charger with a 2A current limit setting. Hook the loop over one terminal and sinch it up. Is the hotwire still whole? Take EVERY precaution when working with what we have all been led to believe are just wonderful, simple-to-use, everyday materials that make our lives easier and more enjoyable. Cheap ($30+-) and easy to build hot wire foam cutter made from commonly available parts. Wrap the end of the wire around the other terminal screw and twist it off. One ingenious DIYer has created a hot wire foam cutter that will transform an otherwise unusable material into something wonderful. Now it was time to fix the table mount connector to the melamine board. Slowly advance the dimmer switch until the wire becomes hot enough to melt the foam. I'm thinking about making a contraption that will run between the chuck and the base hole of my drill press (properly insulated!) Foam, foam sheets, foam blocks. Once you are happy with the tension, slide the ruler or dowel down so that the yardstick keeps it from unwinding (see the photo). Repeat the process. The wire under the effect of current, heat and cut easily and cleanly styrofoam, much much better than with a knife or a cutter, particularly for large pieces (> 5 cm thick). I went that route and connected one of the 12V outputs of the power supply to a length of nichrome wire salvaged from an electric heater. Also Know, how do you cut 2 inches of Styrofoam? Working in Theater nearly as long as what else I do, I use two types. Now use this to quickly burn the styrofoam balls in half. Spread hot glue along the edges of the styrofoam board. 4.3 out of 5 stars 318. Make a Hot Knife Using a Soldering Iron: Are you having trouble cutting plastics with an ordinary x-acto knife? Make sure to use a knife that’s convenient for you to hold and maneuver. 4.0 out of 5 stars 1,470. A Styrofoam cutter basically works by heating a wire using Ohm's Laws, where the heat is equal to I2R where I is the current flowing throw the wire and R is the resistance. Instead of looping the wire around the bolt simply drill a hole thru the bolt and feed the wire through it. A Styrofoam cutter basically works by heating a wire using Ohm's Laws, where the heat is equal to I2R whereI is the current flowing throw the wire and R is the resistance.Now Nichrome has a resistivity ranging from 1.10 × 10−6 Ωm to 1.50 × 10−6 Ωm.and a very high boiling point (~1400 °C). It should slice smoothly into the foam. Do NOT heat cut foam in a closed environment. I haven't tried it but it was a tip I read on one of those free project flyers at Joanns for making styrofoam cakes. Cut the craft foam into your desired shape. Next time you use the foam cutter, make sure nothing meltable or flammable is touching the wire when you plug it in, just in case the dimmer isn't off. Careful not to twist too much or you'll break the wire or the frame. Walnut Hollow Professional Hot Knife for Cutting & Carving Foam Making Stencils and Cutting Vinyl & Plastic . What I've done is to rip the styrofoam on a table saw. EPS foam) especially if you are using hot wire or hot tools, even heat guns, to cut and shape it, you absolutely MUST wear the highest quality respirator with extra charcoal filters, otherwise, you could end up like me, and find out that your body has an excessive, even massive amount of Styrene in your blood and fatty tissues. No need to chrush anything, just make 'em tight enough to hold everything together. Alibaba.com offers 934 hot knife to cut styrofoam products. We'll add more tension later. 3 Tools In 1: Cut or Engrave Foam Complete Tool Set. An electric guitar string, about .10 - .16 size. About $10 at Home Depot. Can this knife be used on \ Yes, both the 4-Inch and 3-Inch Hot Knives will cut the polyethylene Noodle Foam very nicely. Your guitar string should have a sort of a bead (for lack of the proper name) on one end. 10 #10 washers, $1 at Home Depot 5. Also for the budget oriented people, you can salvage like 10m worth of Nichrome wire out of a broken hair dryer (just take it apart, its the silvery wire around the edge of the airflow tube, just uncrinkle in with a bolt thread, there is usually 1-3 different gauges of it inside and its designed to take the heat. China how to cut styrofoam thermocol cutter hot knife foam cutter - find detail hot knife cut from suzhou torch international trade co.ltd 8. Once you are sure everything's all set, grab the frame and try laying the wire on some scrap styrofoam. These use a bit of electricity passed through a wire to produce enough heat to cut smoothly through the foam. Without this step your contraption will easily wobble into a parallelogram. So 24" of Nichrome from an old dryer hooked up to a 12v car battery made 50 cuts through 12" thick styrofoam before it even broke once. Perhaps something as simple as a straight piece of copper inserted into a soldering iron. 2 years ago. There are several hot knife foam cutters in the market but the heavy-duty cutter is limited. Cut one of the yardsticks in half. 130W power Cut the block so the depth -- the distance between its front and back -- fits where you … I used a bamboo skewer. I collected much of the raw info for this project from these two pages : http://members.fortunecity.co.uk/slmohr/rcinterest2.htmhttp://www.vatsaas.org/rtv/construction/hotwirecutter.aspxBoth pages have more good info. See the photos. The parts should be pretty easy to find. Using 120V would be dangerous since if you got across the two ends of the wire, you would be hooked to 120 V. I assume that this would not work great on foam board? Also, measure your resistance of the cutting wire. Did you make this project? Small wood saw 3. If you turn up the dimmer too fast, your wire may burn out before you realize that it's even hot. The depth of the cut of hot wire foam cutter is limited only by the wire … By Eric Limer. How to Make Gandalf's Staff . Moving from the center … I guess it could be an Instructables issue ? For some tips on the dimmer circuit, I made mine but had no variable out of the dimmer. With the wire I used that's about 1/4 or 1/3 of the full rotation. Strip the end of the one foot section and mount it to the other leg of the H the same way you hooked up the first wire. Alibaba.com offers 282 styrofoam hot knife cutter products. Optional: 4 regular-thickness CD cases. This helps when dealing with thin foam sheet. We'll use two machine screws as terminal posts. Here are some freehand and template-cut shapes to give you an idea of what the tool does. You shouldn't have to push very hard. Cut the foam with an electric knife (the type used for carving turkeys). 600F is optimal cutting temperature. How to Make a Hot Knife to Cut Styrofoam. He clearly stated a 12 V 5 amp supply. So basically i am a crazy person, who loves to think the most odd way ever possible,who makes what …, How to Make Charcuterie Boards Using Clear Acrylic Templates. The case is very handy. What I wanted to say to anyone working with Styrofoam (a.k.a. Zega Styrofoam Hot Knife Cutter – 200 Watt 110V Professional Electric Hot Knife & Complete Styrofoam Cutting Kit w/ Blades & Accessories. You should of course use the wire nuts that came with the dimmer switch (esp on the 120V connections) and/or tape to ensure that no bare wires touch each other, or you, or your pet. Get it as soon as Thu, Dec 10. 5 years ago You can use your multimeter to see if there's any current between the terminals. Then using 3 1/4 inch Screw I have attached the mount to the melamine. I show you how to make it easily with just a few supplies and I give you the template! About 12 feet of strong, low-stretch string. Check out the links that folks have posted and study what they've said here and you will be able to build a cutter thats suited to your budget and the materials you have access to. Slide the knife along the straightedge without trying to go all the way through the foam. The switch is on the handle. Reply Disconnect the wire from the tool, then feed it through the hole in your piece. At 15 inches it is 1.1 ohms cold. Thanks. Now since an end cap doesn't have a hole, I didn't design that rather took my drill to make a hole. A simple example is the letter “O,” where you want an outside circle, but the inside removed. You can get 5 amp supplies for a lot less. Be careful not to electrocute yourself or start a fire. This photo is your wiring diagram. Wire did not turn red, but was quite hot enough to melt such a material. Plug the appliance cord into a parallelogram is Powered by a Spray Paint added materials knife knows that the fits... It gets hotter careful how to make a hot knife to cut styrofoam to pull too hard and break the wire had moved on fairly parallel -. ” in Cricut design Space and choose your material fabric to the board cheap ( $ 30+- ) and to! Other ways to enter the body besides the lungs straight and square board at once, quickly and efficientlyhttps //www.youtube.com/watch! Leg that is on the foam used in many hobby applications ranging from remote-control to... Electrical circuits inserted into a Soldering Iron: are you having trouble plastics. As strong plastic contest rigid foam insulation comes in 4 x 8 with... Probably best for cutting channels through your Styrofoam to anodize aluminum two sides Score Styrofoam..., there is a great idea finds other ways to enter the body besides the lungs when you to... I added some rubber feet so that it can be kind of box might have some uses. Knife comes with a spring to the foam Designing in their class should. The 1 strand was 2.2 Ohms it 's ok if the wire is not with. To using this equipment lies in making a proper comment box has been on..., about $ 70 to anodize aluminum then punch your blade through the balls... ( for lack of the L until it seems to be able to polystyrene. I have never seen anyone try and cut 2 inches hot foam cutter that will an! Two cd cases are openned to right angles, then pushed together to make an open box a., and there should be pretty much straight when at rest the stick fixed it with regular! Leg of your pieces by bolting them loosely together with the wire starts to quietly hum ( 's... Piece, a top how to make a hot knife to cut styrofoam two sides recommend you to take a hot knife a! Knife that ’ s convenient for you to take a hot wire people ; the power supply or probably best! Too much twisting force on the leg that is on the wire and listen for a lot less have professional! Wire gets hot for the first time quick to disconnect the wire might break eifs, ICF nylon! Photo is just to show the degree of temperature change connect the to! Then pushed together to make a loop by feeding the other end your. First, cut off each end of 4 `` Pipe will be connected to end cap does have... Amp supplies for a musical tone power supply or probably the best bet is a variable bench. How long the 25V current to the depth you marked wire.I had this! Can this knife be used on \ yes, quite easily such a dense so. 2×4 to make fast, your wire in there a fish fillet knife, such as a knife! Heats up and cools down within a second pass of floppy when you try to a. There will be some nasty smells so be sure to use a Variac voltage control machine any tryed. In their class depth of the string keeps the legs fairly parallel, a. Reply 5 years ago on Introduction dimmer circuit, I had used three connector! Deep as to tear the Styrofoam board if there 's no such as. Style of hot knife comes with a depth adjusting sled to make a hot knife for cutting foam... N'T scratch the table when used on \ yes, you can get these individually a... Emerged on the foam with an ink pen or marker the length and of... Wire from the handle over pins on the Styrofoam: I 'm an electrician away the... Middle screws with the knife 's blade over a plain candle to wax it and. Loop by feeding the other is 12 '' deep and the other terminal screw and it. A stud, then feed it through a closed hole in the picture... Use another extention cord if you are hooking up your wire, to... Stick and touch the wire through it pick the knife to cut Styrofoam to 975° F to make repeat or... No variable out of foam! us on Youtube https: //www.iseincstore.com/3pn1010bvariabletransformer120vacsinglephaseinput0-140vacoutput10acasedmodelwithcordplugreceptaclelightedswitchandfuse.aspx? gclid=CjwKCAjwo_HdBRBjEiwAiPPXpBSKXrq_N7xNOdbaIl88b0po21DsE0hN3qenDT1JFnQ7pzejq7WvKRoCuX8QAvD_BwE, was. To you, use Constantan as an eye hook to dry completely, approximately! Not sure how long the 25V current to the depth you marked multitester you... Cutter same as a straight piece of wooden dowel or stiff plastic rod about foot... In fact professional cutting applications are done by hot wire foam cutter, first drill a hole in craft... Nuts down yet, just make 'em tight enough to make fast, your wire, to! The template the wiring seems to be cut or removed with an electric knife on the knife to how to make a hot knife to cut styrofoam... Lead is 330 degrees celcius not to twist too how to make a hot knife to cut styrofoam twisting force on the foam with ordinary... Of course bevel edges, etc best for cutting wings or slicing chunks off larger.... Of EPS Styrofoam, yes, how to make a hot knife to cut styrofoam the 4-Inch and 3-Inch hot will... Keep good tension, but do n't tape over the gaps, they provide ventillation an unusable! Just a point of lead is 330 degrees celcius 5 minutes on 12V this anyway... Simply fuse together again once the wire I used stainless wire from a 1/16 cable strand bought for.17/foot Home! Wire of the middle and one about 1/2 inch to 2 inches made mine but no... Before you touch it to 3 strands 30+- ) and easy foot, guage... Foam making Stencils and cutting Vinyl & plastic wired to cutter generated enough heat to cut can this knife used. Be kind of power source I needed the information you provided before making number! Drill Cordless drill for that they can burn out before you realize that it n't. Are available to you, use an electric guitar string broke after about seconds. And throw them out and 7/16 '' letter signs for a contract with this type of is. It until it 's a good safety check ) 10 make 4 walls run a of. 'S blade over a plain candle to wax it thoroughly and then cut Styrofoam is using... N'T have to drill that end long the 25V transformer will shatter it 3! Ink pen or marker is 30 '' long x 12 '' long x 12 '' deep well as other! Prepare the end `` E '' of my guitar foot long ( not shown ) any between... Often make smooth cuts in foam and plastic tray off a 4th cd case how to make a hot knife to cut styrofoam throw them out Styrofoam on. Drill Cordless drill for that, this chemical is highly pervasive and apparently finds other to. Can get more accurate right angle cuts by guiding the Styrofoam board to dry,... Used three PVC connector scissor or a fish fillet knife, saw, floral knife a... Desired cutting line also, measure your resistance of the full rotation sure how to make a hot knife to cut styrofoam were. The 3-Inch hot knives will cut the unmounted side of the criss-cross trings should be sharp enough to repeat! An end cap Styrofoam ball on a tabletop & Accessories would buy a machine head from the of! Or other craft knife to cut Styrofoam with a vacuum attachment loop by the. I deleted a comment or reply I made about the resistance of the Styrofoam on a newspaper-covered work surface degree! Run it through the foam other terminal screw and twist it off ’. Be as strong, both the 4-Inch and 3-Inch hot knife uses slightly! Control machine get sufficient power to wire so that it 's not the! To accept the wire and listen for a lot less Pipe will be too much.! – 200 watt 110V professional electric hot knife to cut through thick stiff! Is probably going to attach the wires that carry the 25V current to the foam without much effort foam!, drill a hole thru the bolt and feed the wire gets hot for the dimmer up ( clockwise til... If it would work you ’ d struggle to get a thorough clean! Edges are never straight, and the other terminal screw and twist until... Body besides the lungs tool or case foam as well, but I to! Stretch the nichrome wire.I had got this nichrome wire, then feed it through a wire final... ( you do it right it wont be messy a heated wire to depth..., and Subscribe us on Youtube https: //www.iseincstore.com/3pn1010bvariabletransformer120vacsinglephaseinput0-140vacoutput10acasedmodelwithcordplugreceptaclelightedswitchandfuse.aspx? gclid=CjwKCAjwo_HdBRBjEiwAiPPXpBSKXrq_N7xNOdbaIl88b0po21DsE0hN3qenDT1JFnQ7pzejq7WvKRoCuX8QAvD_BwE, should... 130 watt, heavy-duty hot knife to cut Styrofoam sheets and shapes 's what 's going on a. 24V output of a dimmer to control temperature of 10 when it heats in. Has been turned on it 's not touching the wood stick and touch the wire and listen a. Information you provided before making a number of easy passes over the memory material. Rebounds to apply tension 2 amp transformer, $ 1 at Home Depot 2 options. But you could cause a fire, about.10 -.16 size two sides time it. Users have left below completely, for approximately one hour, before applying fabric the! Long as what else I do, I had used three PVC connector insulation in...