Today I ran a test print of my claw hammer I designed over the last few days on the UP printer. I wanted to check for size and scale and I may also take a cast from this into bronze. I am very happy with the feel, form and size. I am also going to 3D print one in hardened resin to test it’s durability. I haven’t quite decided on how I will produce the handle yet. I will be having a think about this over the next few weeks.
For the last day or two I have been designing a claw hammer for larger scale use such as building my house. I went through a few designs and decided I would make use of the CAD and design the hammer so that I wouldn’t have to wedge the handle at the top in a traditional way. I designed the handle and the hammer head so that they join in the handle shaft.
I got a little carried away with the handle when the hammer head started to look a little like a seahorse. I’m not sure if I will keep the base section exactly like this or if I will simplify it a little before production and comfort. I am hoping to cast the top section in bronze and get the handle either milled in wood or 3D printed in hard clear resin.
Yesterday I sand cast my third kitchen cupboard handle. The strange part about sand casting is the pour. I find that quite often when I think pouring the metal has worked, it hasn’t and vice-versa. This time I thought it hadn’t worked, but when I took the mold apart I found that a small bit of sand had fallen from the sides into the bottom of the mold. This resulted in the handle having a large dint of missing metal in the back. Although this wouldn’t be seen I have decided to recast this to make one more perfect. I will be melting the metal to reuse for the next one.
Last week I cast one of the door handles I 3D printed a few weeks ago. I decided to use bronze as the melting temperature is less than brass and it is less toxic to cast. I may still cast them in brass in the future.
At first I tried melting the bronze using two torches. I wasn’t able to get a high enough temperature to make the metal liquid enough. I then moved on to using the electric crucible which melted the metal with ease. The first pour I made a mold of the door handle and a smaller version that I may use as jewellery.
After taking apart the larger mold I found that the pour hadn’t worked. I think this was either down to the fact I pored with a hesitation or maybe the mold was too big. It was still in tact enough to try again. The second pour went well. I sat the mold at a slight angle for the pour and also added air holes in to the mold.
I have started to clean up the handle. I have cut off the sprue and started to file some areas. I might leave some triangles textured and some polished. I plan to add a threaded post so I can fit it to the cupboards.