Do you know which errors and fixes when use ejector pin?
There are some flaws in injection molding that uses ejector pins. The potential flaws and the necessary fixes are listed below.
Ejector pin marks:
The “dents” are ejector pin marks caused when removing the item from the mold. This pin mark may cause the products to break while being used. As a result, it’s critical to design an ejection system into the mold to avoid ejector pin markings.
Injection mold ejector pins should be positioned so that the force of ejection is continuous throughout the portion.
To prevent ejector pin marks defect, place the ejector pins on hard components like metal inserts, pillars, and ribs.
Instead of placing the ejector pins on slopes, design the portion with flat surfaces.
Breaks:
Ejector pins frequently break because there is a mismatch between the force needed to eject the part from the mold and the pin’s strength. It takes force to expel the components from the mold. Sometimes the length of the pin, which is not supported, causes the required force to be greater than the pin’s strength, resulting in breakage.
The use of more ejector pins with bigger diameters is, therefore, the most effective treatment for ejector pin breaks. By doing this, the force needed is distributed evenly across all of the pins, which lowers the likelihood of breaking.
Jetting:
When molten material is injected into a mould quickly or with a small gate size, jetting—which causes the shape to be distorted—occurs. Remedying this entails:
Increasing the gate’s size and regulating how the molten material flows into the mold.
