A method of classifying a temperature control branch of a molding toolincludes producing molded parts in cycles by a portion of the molding tool by introducing heat into the molding tool, and/or cyclically activating a heating device, with introduction of heat into the molding tool, conveying temperature control medium through the temperature control branch of the molding tool to dissipate the introduced heat, measuring a temporal branch temperature profile of the temperature control medium in the temperature control branch over several production cycles, analyzing a curve behavior of the branch temperature profile and/or of a variable derived from the branch temperature profile, in particular of a branch heat flow, over several production cycles, and sorting the temperature control branch into one of at least two categories, according to greater and/or smaller influence on the heat budget of the portion of the molding tool, on the basis of the curve behavior.

An injection molding heat removal sensing and control system and method are provided for determining and controlling a heat transfer rate for a mold in a molding machine. The system includes an inflow temperature sensor for sensing an inflow temperature for coolant provided to the mold, an outflow temperature sensor for sensing an outflow temperature for coolant exiting the mold, and a flow rate sensor for sensing a flow rate for coolant through the mold. The electronic processor is also configured to calculate a heat transfer rate for the mold from the inflow temperature, the outflow temperature, the flow rate for the coolant, and the calculated mass and the temperature of the molten plastic. The processor determines a time lag between when heat enters the mold and when heat is removed by the coolant and pre-emptively adjusts coolant flow rate to provide uniform heat transfer throughout a molding cycle. The heat transfer rate and total energy removed can be determined and provided on the display.

A closed-loop control device includes a target value entrance for inputting a target value for at least one control value, an actual value entrance for inputting an actual value for the at least one control value, wherein the actual value is determined based on the at least one measuring value, a calculation unit for calculating the actuation value based on a deviation of the actual value from the target value in such a way that the actual value follows the target value, and a control exit for outputting the actuation value for the actuator of the at least one tempering circle. The calculation unit is configured in such a way that the actuation value is calculated based on the present operating point or in a manner adapted to the present operating point.

A temperature control apparatus includes a temperature control branch connected to a feed line for a temperature control medium, a pump system including a pump for conveying the medium, a pump open-loop or closed-loop control device for controlling the output of the pump system, a throttle device having a variable degree of opening for throttling a quantitative through-flow of the medium in the temperature control branch, and an open-loop or closed-loop control device with the degree of opening of the throttle device as a setting value and with a control variable from the group: degree of opening of the throttle device, temperature, temperature difference, through-flow, pressure or a physical value to be derived from that group. The pump open-loop or closed-loop control device is configured to control an operation of the pump to adjust the delivery output of the pump system depending on the degree of opening of the throttle device.

Provided is a polymer composition having sufficient heat resistance and optical characteristics. Disclosed is a polymer composition comprising a polymer containing a monomer unit having a ring structure, wherein the polymer composition is, for instance, polymer composition A containing a polymer of a monomer having a ring structure, and when a flat plate of 120 mm×100 mm×3.0 mm in thickness is molded from the polymer composition under the following injection molding conditions of: (1) using a non-vent-type injection molding machine; (2) using a cold runner mold; (3) having a cylinder temperature of 260° C.; and (4) having a ratio of an injection volume of the injection molding machine to a molded product volume of 4.5, a difference between a monomer content in the flat plate obtained at a cooling time of 5 min and a monomer content in the flat plate obtained at a cooling time of 1 min is 1000 ppm by mass or more and 12000 ppm by mass or less.

An injection molding heat removal sensing and control system and method are provided for determining and controlling a heat transfer rate for a mold in a molding machine. The system includes an inflow temperature sensor for sensing an inflow temperature for coolant provided to the mold, an outflow temperature sensor for sensing an outflow temperature for coolant exiting the mold, and a flow rate sensor for sensing a flow rate for coolant through the mold. The electronic processor is also configured to calculate a heat transfer rate for the mold from the inflow temperature, the outflow temperature, the flow rate for the coolant, and the calculated mass and the temperature of the molten plastic. The processor determines a time lag between when heat enters the mold and when heat is removed by the coolant and pre-emptively adjusts coolant flow rate to provide uniform heat transfer throughout a molding cycle. The heat transfer rate and total energy removed can be determined and provided on the display.

A method or system for industrial process optimization, including sensing data about an industrial process cycle that operates according to a set of process setpoints; determining a target performance for the process cycle based on the sensed data; selecting process set-points from a hypothesis space for a future industrial process cycle based on the target performance, and updating the hypothesis space.

The present application relates to an injection molding system, comprising: an input condition storage section 23 to store an input plasticization condition; an ideal plasticization state storage section 24 to store information of an ideal state of plasticization; an input condition simulation section 29 for the plasticization condition based on data stored in the input condition storage section 23; a comparison section 25 to compare the information stored in the ideal plasticization state storage section 24; an optimal condition analysis and calculation section 26 to calculate the optimal plasticization condition when the data stored in the input condition storage section 23 is decided not to be the ideal state of plasticization by the comparison section 25 using the data of the input condition storage section 23 and the information stored in the ideal plasticization state storage section 24; and a condition change indicating section 28 to display information necessary to make a change to the optimal plasticization condition on a display section 22 based on a result of calculation by the optimal condition determination section 26.

A method of classifying a temperature control branch of a molding tool includes producing molded parts in cycles by a portion of the molding tool by introducing heat into the molding tool, and/or cyclically activating a heating device, with introduction of heat into the molding tool, conveying temperature control medium through the temperature control branch of the molding tool to dissipate the introduced heat, measuring a temporal branch temperature profile of the temperature control medium in the temperature control branch over several production cycles, analyzing a curve behavior of the branch temperature profile and/or of a variable derived from the branch temperature profile, in particular of a branch heat flow, over several production cycles, and sorting the temperature control branch into one of at least two categories, according to greater and/or smaller influence on the heat budget of the portion of the molding tool, on the basis of the curve behavior.

Provided is a temperature control device having at least one temperature control branch connected to a feed, and a pump system including at least one pump for the delivery of temperature control medium in the feed. Additionally, the temperature control device is provided with at least one sensor by which at least one of the parameters from the group of temperature, through-flow amount and pressure can be detected, and a control or regulating device for regulating or controlling a delivery of the pump system, to which signals from the at least one sensor can be fed.