对驱动轮轮毂原铸造工艺进行凝固模拟，找出缺陷的成因，并对原工艺进行了改进，采用顶置随形压边浇冒口。
The solidification process of a driving wheel hub cast with former foundry method was simulated to find out the reason causing shrinkage defects.
介绍大屏幕彩色电视机前壳注射模结构，重点介绍侧抽芯大滑块的设计， 顶出机构和进浇方法的改进。
The injection mold structure of the front shell of large screen color TV is introduced, and design of side core-pulling large slide, improvement of ejector mechanism and gating method are introduced.
对于中心位置浇口，由于产品顶出后模具配件和浇品处披锋阻碍很难去掉而造成动模与定模不能分开。
In the case of center-positioned gate, moving die is not separated from fixed die due to the interference of the biscuit part and the cutting of gate is ery difficult after pulling out the product.
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