I was able to prop the phone up on a shelf though, so there's video. There's no pictures here, since I don't want to try to take them while pouring molten metal with the other hand. The vacuum is then released, the machine turned off, and you have your medallion. Once the pour is complete, the vacuum is left running until the button solidifies, which indicates that the rest of the metal has also cooled and no gas pockets can form. The vacuum gets turned on, and once the pressure starts rising, showing the vacuum is set, the furnace is opened back up and the metal poured. It gets transferred to the right side of the vacuum machine, where there is a silicone pad with a small hole in the middle. Fearless Batman is a constant character in movies and animated series. Right after the stir, a flask gets removed from the kiln and flipped over on the pad so the sprue opening is facing up. Batman stencils are sure to please all young fans of superheroes. When the metal is molten, I wait about five minutes for it to come up to temp, verify it's correct with the thermocouple, then give the surface of the metal a quick stir with the graphite rod to skim off any scum from the metal. These furnaces get set to 1200 degrees F until the temp settles, then to 1700, and finally to the casting temp of 1850 for white bronze or 1900 for brass. Other materials are the giant tub of investment powder, a rubber mixing bowl and spatula, a scale, and the vacuum machine.Ībout thirty minutes out, the melting furnaces get turned on, the metal is added, and a pinch of borax flux is added to prevent oxidation. You can also see below that a sleeve has been put on the top of the flask. Now that we've got the trees made, we slip the metal flasks onto the base and get ready to make the investment. I also view it as insurance, since a bubble can cause a lot of work or destroy some detail, making this whole process for nothing. Some people don't use it and say they have fine results this was part of the process during college, so I'm being stubborn. It's a chemical that, once it dries, leaves a film on the models that reduces the surface tension and makes it less likely that an air bubble will stick to some part of the wax during the mold making. This is needed to figure out how much metal to use later.Īfterwards, I spray the models with a vacuum debubbler solution. I have the weight of each rubber base alone written on the bottom of it, so I can subtract this weight from the rubber base's weight to get the wax weight. At this point, it is very important to weigh each base with the sprue tree and record the weights.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |