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Wear heat-resistant gloves and safety goggles while you are steaming and bending the wood. Hook up a steam generator to the steam box with a hose. A steam generator may be store bought or you can use an appliance like a wallpaper steamer. Attach the steam generator to the steam box via a hose or tube. They are available cheaply at most home decorating stores. If you made a homemade steam box, you can drill a hole to fit the hose or tube that connects to the steam generator.
Steam the wood for 1 hour for every 1 in 2. The general rule for steam bending wood is 1 hour for every 1 in 2. This is the temperature that water boils at, so as long as you have proper ventilation in your steam box the temperature should stay close to this number. Open the steam box door to reduce pressure and temperature if it gets more than 2 degrees higher than this. You can add more ventilation to your steam box by drilling holes if you have difficulty maintaining the temperature.
Remove the steamed wood with heat-resistant gloves when the time is up. Turn off the steam generator and carefully open the steam box with heat-resistant gloves.
Remove the steamed piece of wood and begin the bending process as fast as possible before it loses its pliability. Method 2 of Insert the piece of wood you want to steam completely inside a plastic bag.
Use a plastic bag or plastic sheet tubing that is big enough to cover the whole piece of wood from end to end. If the bag only has 1 open end, then cut a hole in the other end so the steam can escape from both sides.
Clamp the bag with the wood to the side of something or set it on saw horses. Use clamps to secure the wood to the side of a workbench or other support. The idea is to suspend it in the air to allow the steam to flow around the wood in the bag as much as possible.
Try to steam wood outside whenever possible. Steaming inside can get very hot, and the humidity can damage other tools in your shop. Cut a hole in the plastic bag and insert the hose of your steam generator. Make a small incision in the middle of the plastic bag just big enough to insert the hose from the steam generator. Put the tip of the hose in. This is the temperature that water boils and generates steam at, so as long as your bag has sufficient ventilation it will stay at that temperature.
Multiply the thickness of the wood by 1 hour for every 1 in 2. You can stick the thermometer in 1 end of the plastic bag or poke a small hole in the side to stick it in.
Tilt the bag to one side wearing gloves to let the condensation drip out. Lift up the bag at an angle when you are done steaming and let all the hot droplets of condensation fall out to the other side.
This will make it safer to remove the wood from the bag. Remove the wood from the bag and proceed with the bending process. Keep your heat-resistant gloves on and pull the wood out of the bag. The faster you start bending it, the more pliable it will be. This could work well for larger pieces of wood that you can just bend and clamp against a large form, such as a boat.
Method 3 of Make a plywood form or bending board to shape the wood to. The product is called layflat and comes in 6 mil X roles As Lou did, I simple put the stringer in the bag filled an old oil can with water connected it to the bag with a hose and wire ties, put the can on a propane burner and let nature do her thing.
After an hour of steaming, the stringers were like noodles and bent on to the stations with no problem. I don't believe I could have gotten the on dry. Thanks Lou!! How did you make the bag, just tape it or did you buy one already sealed. Can you make one with a freezer bad machine, just so long as it is sealed nice to see a vidio on how it is made thanks.
Search online for liner bags compatible with Tommee Tippee Sangenic. The non-branded compatible ones can be bought in , and metre rolls. Try amazon or ebay. Nick Polanksy Artist in Resident at the Autodesk Pier 9 Workshop just posted an instructable on his kerf cutting project. He built a steam bag system for steaming large and long pieces and it worked perfectly! Thanks for another great post Rain. For those who are wondering the plastic used in Steam Chamber For Bending Wood 45 the video is 6 mil polyethylene melted together Uline.
The photo attached is what Lou referenced in the video and this same steaming method on a much larger scale. We have six dogs. Don't have an account? Join Now. Already have an account? Sign In. By creating a Core77 account you confirm that you accept the Terms of Use. Please enter your email and we will send an email to reset your password. Core77 is supported by its audience. Fire up the boiler. When steam steadily flows out of the drain hole, slide your blank into the steam box.
Steam blanks for one hour per inch of thickness regardless of the width. Remove the part from the steam box and bend it [ Photos below ]. Working quickly, position the steamed blank between the anchor block and the end block on the tension strap assembly. Clamp the blank to the bending form and bending arm, applying clamps both vertically and horizontally. Begin to bend the blank around the form.
Thick parts, such as the legs on the desk, require significant force so put your body into the bend or enlist a helper. Thick parts, such as the legs on the desk, require significant forcea so put your body into the bend or enlist a helper. Thick parts may not bend in one operation. When you feel too much resistance, remove the part from the form and re-steam it for 15 minutes. As the bend nears completion, remove the bending arm clamps interfering with the bend.
Then draw the free end against the form with a one-handed bar clamp. Clamp the straight portion of the leg to the form and then add clamps along the curved section. Allow the part to cool for one hour and then quickly transfer it to a drying form. Clamp multiple thin strips at the bend to prevent surface splintering. Leave the part on the form for one week. Safety note!
Steam scalds skin on contact. Opening the steam box releases a cloud of steam, so keep your face and any other bare skin away. Wear heavy leather gloves when handling steamed blanks.
Make sure the drain hole remains open. Do not pressurize the steam chamber: Pressurized steam is detrimental to successful wood bending and extremely dangerous. Source: Boiler: Steam-bending kit no. Sources: Spring steel strip,. Tension-strap hardware for complex curves: S-bend unit no. Lee Valley Hardware, , leevalley. With an old handscrew clamp and some scraps of hardwood, you can set up your thickness planer to Skip to main content.
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