The best castings come from patterns and coreboxes made by professional pattern makers.
Patterns work best when half of the part is mounted on to one side of a board and half on the other.
We have three professional pattern shops that we work with locally that make really good patterns at reasonable prices. They can work with your prototypes or with just your sketches and drawings. We work with the pattern makers to find the best way to put as many patterns on one board as we can to reduce castings costs. We also help the pattern makers with gating and riser design. For castings that are hollow or have difficult cavities or holes, we will need to use cores in the cavities.