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Fan or Edge Gate

A common gate located in the sidewll of the part to prevent restriction of resin flow. Normally used with multi-cavity, two-plate molds.

Gate Design

The gate serves as the entrance to the cavity and should be designed to permit the mold to fill easily. A cavity can have more than one gate. Gates should be small enough to ensure easy separation of the runner and the part but large enough to prevent early freeze-off of polymer flow, which can adversely affect the consistency of part dimensions. A variety of gate designs and locations are shown below:

• Submarine or Tunnel Gate
• Pinpoint or Restricted Gate
• Fan or Edge Gate
• Tab Gate
• Sprue Gate
• Flash Gate
• External Ring Gate
• Internal Ring Gate