| 摘要 |
An engine rocker arm is produced after machining a cast part that has been obtained after grinding stubs off casting. To prevent shrinkage cavity from existing in cast parts, investment casting uses a mold including a plurality of mold parts. Each mold part includes a runner portion and a mold cavity. The position of the mold cavity relative to the runner ensures flow of splash of molten metal down to the runner. <IMAGE> |
