Injection molds have an ejector mechanism to remove the product from the mold when molding is complete. Generally, a pin is used to eject the product, but in cases where the molded product is large, thin-walled, or has a product shape that causes high mold release resistance, the ejector may leave marks on the product.
Therefore, in these cases, ejections are often performed not with general pins, but with blocks that are machined from a portion of the product shape. (Ejector block)
This block has the advantages of not leaving marks because it can eject the product over a larger area than pins and can easily eject products with high mold release resistance, but on the other hand, it is expensive to manufacture, process, and adjust.
There are two types of ejector block joint methods: screw-in and knock pin.
Depending on the shape of the product, as many as 120 pieces may be used per mold.
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