Method of and device for evaluating resin using injection molding machine

A resin evaluation method for an injection molding machine comprising the steps of:

• setting analysis conditions including an injection velocity condition and a resin temperature condition;
• performing injections of resin using the injection molding machine on the set analysis conditions;
• and
• obtaining an interdependency relation of the resin pressure with respect to the resin temperature and an injection velocity or a flow rate of resin based on a relationship between the resin pressure and a screw position or a relationship between the resin pressure and an elapsing time from a start of each injection in the injections of resin.

A resin evaluation method for an injection molding machine comprising the steps of:

• performing a predetermined times of injections on condition of a resin temperature automatically altered successively, and an injection velocity automatically altered successively on each condition of the resin temperature;
• detecting an injection pressure in each of the injections;
• obtaining data of the injection pressure, the injection velocity and the resin temperature in each of the injections;
• and
• automatically obtaining an interdependency relation of the resin pressure with respect to the resin temperature and the injection velocity or flow rate of resin based on combinations of the data of the injection pressure, the injection velocity and the resin temperature in the injections.

A resin evaluation device using an injection molding machine comprising:

• setting means for setting analysis conditions including an injection velocity condition and a resin temperature condition;
• detecting means for detecting resin pressure at set screw positions or set points in time elapsing from a start of injection in performing injections of resin using the injection molding machine on the set conditions;
• and
• analyzing means for obtaining an interdependency relation between the resin pressure with respect to the resin temperature and an injection velocity or a flow rate of resin based on the detected resin pressure, the injection velocity and the resin temperature at set screw positions or at set points in time elapsing from a start of each injection.

A resin evaluation device using an injection molding machine comprising:

• control means for controlling the injection molding machine to successively perform injections of resin at different injection velocities set for each of set different resin temperatures;
• detecting means for detecting a resin pressure in each of the injections;
• storing means for storing a set of the resin temperature, an injection velocity and a resin pressure in each of the injections;
• analyzing means for analyzing interdependency relation of the resin pressure with respect to the resin temperature and the injection velocity or a flow rate of resin based on data stored in said storing means.