Cold runner

Expenditures runner of the mold.

Way of the runner of the mold usually closely related to the type of gate is used. From this emerged a two plate mold design and three-plate mold. Gate Mold type: strip gate, tunnel gate and gate flash,

if there is no requirement or a specific form of the product, mold will be designed with two plates.

At the time of mold starts to open, regardless of the sprue runner R for pin carried by runners who have undercut at the edges.Meanwhile, the gate tunnel cavity disconnected from the product because it was interrupted by the lip of the pit gate. At the opening of the next runner mold and product driven by the stripper plate, the runner forcibly detached from the undercut at the end of the  runner-pin, then fell with the product. Here can be seen, that the mold with a tunnel gate will produce a product that has been separated from the runner. Being a product with a strip gate still hung with runnernya, to require additional work to cut the tow runner from the product.

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