The design of the through hard pins involves the same hardness throughout the diameter of the ejector pin. With this characteristic, the ejector pin can last much longer in working temperatures below 200oC. It is mainly suitable for plastic injection molds.
Nitride H13 Pins
If the working temperature goes beyond 200oC, then nitride H13 pins will be a much better fit. The reason is that the surface of these pin has a hardness of HRC 65 to 70, which can lead to a much better life expectancy in high working temperatures. These pins are best for die casting.
Black Ejector Pins
Nitride H13 pins are not suitable for working temperatures that exceed 600oC, so black ejector pins were developed as an option. These pins have a special black surface coating treatment on the entire pin that can sustain working temperatures up to 1,000oC. Also, the special black surface treatment provides additional self lubrication to the ejector pin, making it an excellent fit for automobile injection molding. These pins are suitable for most working temperatures, but the cost of such a pin is higher.
From the above comparison, it is evident that different types of ejector pins are suitable for different environments, which is why working temperature is a necessary factor to consider before your final selection. This will also apply to ejector sleeve and ejector blade selection.
If you want get more information about ejector pins, welcome to contact us freely! NITONI is a specialized in producing Ejector Pins, Ejector Sleeve etc. We have perfect after-sales service and technical support. Look forward to your cooperation!
