INTELLIGENT MOLDING AND METHOD FOR CONTROL OF TONNAGE APPLIED TO CLAMP Russian patent published in 2008 - IPC B29C45/76 B29C45/64 

FIELD: technological processes.

SUBSTANCE: in process of control instead of full tonnage application to clamp during significant part of injection cycle duration, control is performed with clamp feedback (for instance, by control of hydraulic pistons), which makes it possible to accurately balance clamp pressure so that it preferably somewhat exceeds instantaneous pressure of injection. During the first stage injection pressure profile is repeated with the course of time. As a result, applied tonnage is changed with the course of time, according to pressure measurements with the help of detectors. During the second stage previously saved or historically archived information about injection pressure is searched for and, instead of tonnage change, permanent tonnage is applied that reflects maximum registered or most probable injection pressure in this mold (according to record saved in reference table that is associated with certain configuration of mold). Device controller provides application of applied tonnage through plate and connection rods of injection molding device. Pressure detectors that are installed either on mold surface, on components of set and/or in relation to force cover trajectory, make it possible to control applied tonnage of clamp cover with the help of microprocessor.

EFFECT: possibility to limit applied tonnage to mold during molding, reduction of components wear and consumption of less energy.

14 cl, 5 dwg