Patent ID: 11926085
Assignee: KISTLER HOLDING AG
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A method for controlling an injection molding system during formation of articles with a mold having an inner surface and a plurality of groups of cavities that includes a first group of cavities and a second group of cavities, each group of cavities comprising at least one cavity confined by the inner surface, and each respective group of cavities further having a respective pressure sensor disposed at the inner surface in a region of a cavity of each respective group of cavities, and each respective group of cavities being at least partially surrounded by a respective tempering unit that includes a tempering medium that provides an energy flow to or from the respective at least partially surrounded group of cavities, the method being performed during the formation of the articles in the mold and comprising the steps of:
a) determining an actual pressure in each of the first group of cavities and the second group of cavities during the formation of the articles in the mold,
b) using the actual pressures in step a) in determining a reference pressure as a function of the actual pressures in step a) during the formation of the articles in the mold for each of the first group of cavities and the second group of cavities, wherein step b) includes determining a reference pressure by averaging the pressures of each group of cavities,
c) determining a difference between the reference pressure and the actual pressure of the first group of cavities, and
d) controlling the difference to become minimum that is essentially zero within the constraints of the accuracy of the respective pressure sensor, wherein step d) is performed by regulating the energy flow of the respective tempering unit.