View Full Version : Help making a large wrench prop?

07-31-2009, 01:48 AM
I've been trying to figure out how to make a pair 2 ft. long, large wrenches. I've tried going down the cardboard method, but I can't seem to figure out how to give it more depth. The cardboard simply makes it fat, flat, and thick.

As much as I'd like to bring a real pair of wrenches, they look pretty heavy and deadly. Lol XD. Does anyone have any ideas as to what I could do ;___;?

07-31-2009, 05:29 AM
Do you have an example picture what you want it to look like?

I made smaller wenches for a friend cosplaying Yosuke from Persona 4 and wanted to the special weapons.

We simply bought or collected carton/cardboard and foam as well as wallpaper glue and old newspapers and duct tape as used for painting and/or patex.

The wanted shape we drew on a large enough piece of paper and copied it 4 times on the carton, then we added "glue edges" just like in the example of this cube:

Then my friend choose the thickness she wanted and we copied the raw form of the wenches onto the foam also four times, then glued two each together with patex.

Once dry, the carton-wenches went on each top and bottom. Finally we glued the carton stripes around. The duct tape we only used as extra-hold on the round parts.

Finally we put two layers of old newspaper with the aid of the wallpaper glue around it.

When all of that was done and dry we added color, which was also what my friend used to get in some 3-D effects by painting them on.

If that is to little 3-D for you, you can use pappmaschee to give it more details.

As mentioned at the beginning, a reference picture always helps :) also you might want to show off those you already made, maybe they can be used with some additional work :)

U-Me* Mackerel
07-31-2009, 09:26 AM
Dragon's method is pretty solid. ^^ If you want to have grooves on the surface of the wrench, try this out as well -

1. Using either craft foam or cardboard, draw out the shape of the wrench (or do this on thick paper, stick to the material, and cut round). Wrenches have grooves in them - look at a real wrench for reference, and use a craft knife to cut out where these grooves are. Let's call this shape Front. http://static.howstuffworks.com/gif/wrench-1.jpg This is an example, with a long groove along the handle. Cut out another one for the back of the wrench -we'll call it Back.

2. If the distance from the tip of the handle to the tip of the wrench is the length, and the width is, well, how wide that is, then the height is, if you put it on a horizontal table, the distance from the table to the top of the wrench. Decide on the height of your wrench - the bigger this is, the greater depth your wrench will be (I think this is what you mean by depth?). So decide on that (you may want to work it out by getting a refrence wrench and working out the ratio between the height and the length, and applying that to your prop), and using a piece of string, measure the perimeter of the wrench (i.e., the distance around the edge). Cut out a rectangle of foam/cardboard, with the width of the rectangle being the height of the wrench you decided upon, and the length being the perimeter of the wrench (you may want to add a little extra for safety/glue tabs, if you're using them).We'll call this A.

3. Again with the string, work out the perimeter of the holes that you cut for the grooves. Decide on the height of the grooves (make them very shallow, usually), and cut out another rectangle for each groove, with the width being the height of the grooves and the length being the perimeter of the grooves. Call this B, and any subsequent rectangles C, D, etc.

4. Draw around one of the two flat wrench-shaped pieces you have, and cut out two of these drawn shapes. Don't bother drawing grooves in them. Let's call these X and Y (I'm running out of letters!).

5. Assemble! Glue A around the edge of the Front, so that it is perpendicular to the Front. Glue B around the edge of the groove it's designed for, and repeat for C, D, etc. Glue around the bottom of B (C, D...) and around the outside of X, and push X upwards until it touches the bottom of B (C, D...). Do the same for the grooves on the Back, pushing Y upwards to meet the smaller rectangles for the grooves, and push the Front and Back of the wrench together (after lotsa glueing!), so that it makes a 3D shape. You may want to tape bits for extra support.

6. Finish. Paper macheing it & gessoing & sanding will give it a smooth finish, and paperclay, Fimo or Sculpey can be used to make the grooths appear more curved. Paint the whole thing & weather & varnish (as you want a metallic appeareance, obv. use metallic paint & you may want to coat with floor polish to make it shiner). Ta-da! Aforementioned clays and/or 3D paint can be used to add extra detail if necessary, and if you used foam, before painting, you'll need to seal the foam by coating it in a mix of glue & water. 1/4 school glue, 1/4 fabric glue & 1/2 water works well. The whole thing should be very lightweight & look realistic. In the example wrench I linked to earlier, it had a little corkscrew-shaped thingy at the head of the wrench. You can make this out of any of the clays mentioned, simply by shaping a cylinder out of the clay, rolling out a long thin 'sausage shape', and winding the long thin shape around the cylinder in a spiral.

Hope that helped! ^^ Sorry for the tl;dr.