When we do mold design and manufacture, some big parts requires long ejection stroke, at this time, and the two-stage ejection can reduce the force applied by the ejector pin when it is ejected, thereby avoiding defects in the product. 

The two-stage ejection is welcomed by the market and it has the following advantages:
1. Mechanical interlock design, safe and reliable, the ejector unit comes with locating ring and connecting bolts for easy installation.
2, The self-locking function of the locating ring, can easily tighten the outer sleeve. It has a variety of specifications for different sizes of mold loading requirements.
3, It need to be accurately installed (one mold generally install an ejector device); the stroke should be calculated accurately, so as not to cause damage to the product.