Hydraulic Gating Cutting Reliably Separates Molded Parts 

Ermanno Balzi Srl has been engaged in the production of components and accessories for molds since 1995. Among the solutions the company offers for the molding of plastic materials is its hydraulic gate cutting technology, which enables the separation of the molded part from the gate during the molding cycle via the axial movement of a cutting tool operated by a mini cylinder.

The cutting, more precisely described as a material displacement, is carried out in a closed mold at the end of the holding phase when the polymeric material is still hot. The high pressure required by the process can be provided through a hydraulic power unit or a pressure multiplier applied to the mold and controlled by the injection molding machine.

There are multiple advantages in this production process, including the elimination of external cutting equipment; repeatability of a cut with high aesthetic quality; the possibility of using larger injection points without requiring external gate removal systems; and the elimination of risks for the operator during manual gate removal. Applications with different materials and types of gates are possible, including film and diaphragm injections.