This section provides an overview for runner chucks as well as their applications and principles. Also, please take a look at the list of 8 runner chuck manufacturers and their company rankings.
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A runner chuck is a chuck that grips the runner and removes the molded product from an injection molding machine. Molten resin injected from the nozzle of an injection molding machine is fed through a thick passage in the mold called a sprue, through a narrow passage called a runner, and through a place called a gate to the molding section.
A runner chuck is normally used to grip the runner and remove the molded product, but it is also used to chuck the molded product itself or the sprue.
Runner chucks are often used in injection molding machines where robots are used to remove molded products. To automate the removal of molded parts, several slide rails are combined so that the runner chucks can move on the rails.
The runner chuck often uses a method in which a runner is clamped between two claw-shaped metal fittings. It is driven electrically or pneumatically. A type with a sensor attached to the jaws is usually used to check the operation and move on to the next step.
When removing molded products from the mold, the method of removal is selected according to the shape of the gate, which is the entrance to the molded product in the mold. In the direct gate method, where the sprue is directly connected to the gate at the center of the molded product without a runner, the molded product is chucked or the sprue is chucked. Since large gate marks remain, finishing after gate cutting is required.
Use runner chucks or chuck the sprue when connecting to the gate from the side of the molded product via a runner. Since gate marks remain on the molded product, finishing is required after gate cutting.
In the submarine gate method, where a tunnel-shaped gate is provided at the end of the runner, both the molded product and the runner are chucked. The gate is automatically cut when the mold is opened, eliminating the need for post-molding processing.
In the case of the pin gate method, which uses three molds and separates the molded product from the runner, the molded product is chucked and runner chucking may not be required. The runner and sprue, including the pin gate, are separated from the mold at the first mold split, and the molded product is removed at the next split operation. Gates are automatically cut with the mold split, so gate cutting after molding is not required.
*Including some distributors, etc.
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