Hellstern, P.P.HellsternBoog, C.C.BoogFischer, G.G.FischerSchmidberger, E.E.Schmidberger2022-03-082022-03-081999https://publica.fraunhofer.de/handle/publica/304320NOVELTY - The time point at which pressure rises is determined with a temperature sensor which detects a short term temperature increase during the general temperature increase. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is made for the process equipment which includes a temperature sensor. Preferred Features: The pressure rise occurs when the melt reaches a wall of the tool close to the temperature sensor which can be close to the sprue and at a ponit remote from the sprue. Both sensors have a rapid response to temperature change. USE - For determining the point at which the injection pressure is changed to follow up pressure in an injection molding cycle. ADVANTAGE - The method eliminates the use of a number of expensive pressure sensors.de608670patent1998-19803352