Inner slides

Removal of undercuts using inner slides

An inner slide is a tool and mold making device featuring a slide/core pull located below the parting line, which is commonly used to remove undercuts in complex component geometries. If a hydraulic cylinder is used in such an application, its pulling stroke will be used. The initial motion requires particularly high forces since the solidified plastic still adheres to the core. This application usually requires core end position detection in order to correctly control the automatic removal and to avoid damage while the mold is closed. There is a variety of detection options that can be integrated into the hydraulic cylinder.

Tips and tricks:

Cylinders with short strokes and small piston diameters often lack a vent. If this air remains in the cylinders during operation, failures are bound to occur in many cases. 

• A rigid connection between cylinder and core is not recommended as it may cause lateral loads and, thus, cylinder failure. We would like to refer to our couplings and the matching counter pieces from our accessories at this point.
• A cylinder design calculation tool is available in our CAD configurator.
• An insufficient number of sensor inputs on the machine is a common problem, especially if multiple cores/slides that require monitoring need to be moved. Our series connection box is an accessory that provides an opportunity to combine signals in such situations.