9 types of gates in injection molding（三）
There are several injection molding gate types available in the market today, each with its unique features and advantages. Here are the nine types of gates commonly used in injection molding.
Fan Gates
Fan gates uses a small, flat gate that is attached to the part at one end, with the other end extending into the mold cavity. The plastic flows through the gate and into the cavity, filling the part from the side.
Fan gates are commonly used for parts that require a clean, finished appearance on one side, as the gate mark can be located on the side of the part that will not be visible or on a separate runner that can be easily removed.
One of the advantages of fan gates is that they can help to reduce the occurrence of cosmetic defects on the part.
Since the gate mark is located on a non-visible part of the part or on a separate runner, it does not affect the overall appearance of the part. However, one of the limitations of fan gates is that they can result in the uneven filling of the cavity, particularly for parts with complex geometries.
Pin Gates
Pin gates are types of injection molding gate that uses a small-diameter pin to control the flow of molten plastic.
The gate is typically located at the edge of the part, and the plastic flows through the narrow opening of the pin gate, resulting in less waste and faster cycle times. Pin gates are commonly used for parts that have thin walls or require a high level of precision.
One of the advantages of pin gates is that they can result in a clean, finished appearance on the part. Since the gate mark is small and located in a non-visible area, it does not affect the overall appearance of the part. Additionally, pin gates can be useful for parts with small features or thin walls, as they allow for a precise flow of plastic into the cavity, reducing the risk of sink marks or other defects.
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