The narrow and shallow portion of the runner as it enters the cavity is called the gate.
Listed here are the different types of gate with their characteristics. Sprue and runner are described here.
Side gate: This is the most commonly used gate type and is commonly used for mold structures with 2 or more cavities. It is placed at the side of the plastic product. The gate has to be cut manually by a cutter.
Submarine gate: The positioning of this gate is flexible thoughout the sides of the plastic product. It can be placed on the fixed or movable side of the mold but the design has to be thought about carefully so that the product will not be left inside the fixed cavity. The gate automatically cuts itself as the mold opens.
Fan gate: It is commonly used for large and flat plate products. It is placed at the side of the product – same as the side gate. The gate has to be cut manually by a cutter.
Film gate: Similar to fan gate except that it is commonly used for thin and flat plate products.
Pin gate: This is possible for molding multiple cavities or parts. The gate positioning is relatively flexible at the top side of the product. The runner layout is very flexible as well. The mold base structure is complicated because it uses a 3-plate method.
Banana gate: This is not a very common gate. It is used when the visible surface of the product requires no trace of the gate. The gate automatically cuts itself as the mold opens.
Direct gate: The sprue serves as the gate. It is placed on the top side of the product. The gate has to be cut manually by a cutter. This gate type can only produce one part per shot. The molding cost is low because the material from the runner was ellimenated. The injection pressure was reduced due to direct cavity filling. The simple mold structure makes the mold cost lower.
dear sir i was looking for Tab gate,which I would like to have by return email please.
Simple, concise and very explicit.
Found exactly what I wanted to know.
injection mould all type gate point and all type runner knowege
Can you please mention the disadvantages,& when are individual gates that mandatery??????????
i got very useful information from here. thank so much
Thank you for a simple concise summary.
Is banana gate suitable for Polycarbonate moulding
how we design gate in mold and design of nozle
What does it means for VENT Gate?
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The mold knoweloge cool!I love it inmy design
Hello sir,
I want to know about vent design with self explanatory images and photo of molded part with the runner gate & vents before trimming.
Thanks in advance.
i want to know about basic difference between egde fan gate and submarine gate
definite, simple and precise approach
very helpful
Banana gate is used for which kind of article?
Banana gate is used for which moulding?