希望哪位大虾帮帮小弟翻译下面这段
这段英文涉及的是机械领域中注塑模具部分,希望能用相对专业的知识给与翻译.
在下不胜感激....
UNDERCUTS
An udetcut is an indentation or a projection on a part which has the effect of making it difficult or inpossible to eject the part from asimple, rigid, two-part mold.
Some parts with minor undercuts may be flexible enough to be stripped from the mold without damage;many flexible thermoplastic materials can tolerate a 10% strain during the mold ejection. Larger undercuts are undesirable. Even if the tool designer is sufficiently ingenious to conceive of arrangements involving multipart tools or movables side cores to accomplish the possibility of extra flash or parting lines being apparent on the molding. Before committing oneself to an undercut part, one should be sure that it is necessary.