Where in the casting do we use the ejector pins and what is the purpose?
Where in the casting do we use the ejector pins and what is the purpose?
The ejector pins are a necessary part of the mold and the molding process. They serve to “push out” the aluminum casting from the ejector side of the mold after the aluminum is solidified and the mold opens.Apr 1, 2014
What is the purpose of ejector pins in the injection Moulding process?
Ejector pins are the "bouncers" of the injection molding world. They apply a force to eject a part from the mold, and in some cases can leave marks.
How hard are ejector pins?
With this characteristic, the ejector pin can last much longer in working temperatures below 200oC. It is mainly suitable for plastic injection molds. ... 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.Jan 5, 2007
What is the role of ejector pins and ejector return pins?
Ejector pins are the "bouncers" of the injection molding world. They apply a force to eject a part from the mold, and in some cases can leave marks. ... Once the mold is opened, the pins extend into the mold cavity, push the part out, and then retract, allowing the mold to close and be refilled.
What is the function of the return pins?
Return Pins Make sure that the ejector unit is back in its original position when the mold closes. Precisely align the two halves of the mold base (fixed and movable).
What are ejector pins made of?
Ejector pins are long pins that are used in the injection molding industry to push the final molded product out of the mold. They are used forcefully to eject the solid part out of the mold and are usually made of high-quality steel. They are also known as knockout pins, knock-out pins or KO pins.
Why is an ejector pin bent?
Bars that are too long or of different lengths are the primary reason for bent ejector crosses. If the mold has knock-out extensions attached to the ejector plate, and they are not the same length, or one of their retaining bolts comes loose, this too can cause an uneven load on the ejector plate.Aug 1, 2018