起模就是把铸模从砂型中取出来的操作过程,也叫拔模、起样等。起模需要细心操作,起模不当会损坏砂型。如果砂型损坏较大,不仪修补浪费时间,而且会使修补的地方形状和尺寸不准确,甚至使铸件产生气孔、夹砂、砂眼等缺陷。一、起模时砂型损坏的原因 1.铸模无起模斜度或有倒斜度。 Mold is the mold removed from the sand in the operation process, also known as drafting, starting and so on. Die need to be careful operation, improper mold will damage the sand. If the sand damage is greater, do not impose a waste of time, and will repair the shape and size of the place is not accurate, or even produce porosity, sand, sand blisters and other defects. First, when the sand mold damage caused by the reason 1. Mold without mold slope or tilt.