A system includes a cavity, an injection nozzle configured to inject material into the cavity, and a plurality of sensors at sensor locations. Each of the plurality of sensors is configured to measure parameters at one of the sensor locations. The system lacks a strain gauge. The system further includes a controller configured to control a flow rate of the injection of material into the cavity. The controller is configured to receive the measured parameters and compare the received information to predetermined curves. The controller is configured to control the flow rate when the measured parameters deviate from the predetermined curves.

An injection mold (1) for the manufacturing of at least one tubular plastic part comprising a first mold half (2) comprising a first mold plate (3) and a second mold half (4) comprising a second mold plate (5) being arranged displaceable with respect to each other in an axial direction (Z) between an open position and a closed position. The injection mold further comprises at least one core (6) protruding from the first mold plate (3) and the second mold plate (4) comprising at least one cavity (7) suitable to receive the core (6) of the first mold half (2) to form a molding cavity (8) in the closed position of the injection mold (1) for receiving molten plastic material therein to form the tubular plastic part. A bushing (9) is advantageously arranged in the second mold half (4) adjacent to a dorsal end (10) of the cavity (7) at least partially displaceable with respect to the second mold plate (4), said bushing (9) comprising a bore (11) in a closed position of the injection mold (1) suitable to receive a tip (12) of the core (6).

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 machine includes a cylinder that accommodates a molten resin, a discharging nozzle, a piston that discharges the molten resin from the discharging nozzle, and one or more processors configured to execute the following functions. The functions include calculating a target pressure at which a flow rate of the molten resin discharged from the discharging nozzle becomes an indicated flow rate, controlling a pressure of the molten resin in the cylinder such that the pressure becomes the target pressure, acquiring a temperature of the molten resin in the cylinder, and acquiring a pseudo-plastic viscosity corresponding to the temperature of the molten resin. The target pressure is calculated based on the indicated flow rate, the temperature of the molten resin, the pseudo-plastic viscosity, and the size of the discharging nozzle.

An injection molding machine management system that manages an injection molding machine configured to mold a molded product by injection molding, and the injection molding machine management system includes: a physical quantity acquisition unit configured to acquire physical quantity information including at least any one of a first physical quantity representing a physical quantity related to the injection molding of the injection molding machine, a second physical quantity representing a physical quantity related to the injection molding of a molding mold mounted on the injection molding machine, and a third physical quantity representing a physical quantity related to quality of the molded product; a storage unit configured to store a cumulative number of shots of the molding mold in a predetermined maintenance period and the physical quantity information in time series; and a display unit configured to display a display screen on which the cumulative number of shots and a physical quantity included in the physical quantity information are displayed in the same time series. The maintenance period is a period from a first time point that is a time point at which the molding mold is maintained to a second time point that is a time point at which the molding mold is maintained after the first time point.

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 process for injection molded microcellular foaming various flexible foam compositions from biodegradable and industrially compostable bio-derived thermoplastic resins for use in, for example, footwear components, seating components, protective gear components, and watersport accessories wherein a process of manufacturing includes the steps of: producing a suitable thermoplastic biopolymer or biopolymer blend; injection molding the thermoplastic biopolymer or biopolymer blend into a suitable mold shape with inert nitrogen gas; controlling the polymer melt, pressure, temperature, and time such that a desirable flexible foam is formed; and utilizing gas counterpressure in the injection molding process to ensure the optimal foam structure with the least amount of cosmetic defects and little to no plastic skin on the outside of the foamed structure.

Provided is a resin molded product having excellent scratch resistance. The resin molded product of the present invention is a resin molded product including a methacrylic-based resin composition, in which the methacrylic-based resin composition contains a (meth)acrylic-based polymer (A) and a fatty acid compound (B), and an absorbance ratio P1/P2 of a peak absorbance P1 in a wave number range of 1630 to 1650 cm.sup.−1 to a peak absorbance P2 in a wave number range of 1710 to 1730 cm.sup.−1 on a surface of the resin molded product, measured by a single reflection ATR surface reflection method with an infrared spectrophotometer, is 0.0040 or more.

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 controller for an injection molding machine having a heater and serving to estimate the surface temperature of the heater at a predetermined time, the controller comprising: an operation information acquiring unit for acquiring, as operation information, heater output power and heater setting temperature of the heater during a predetermined period immediately before the predetermined time; a surface temperature acquiring unit for acquiring the surface temperature of the heater during the predetermined period; an actual performance information acquiring unit for acquiring, as actual performance information, the actual performance on the transition of the ratio between the surface temperature of the heater and the setting temperature relative to the transition of the heater output power of the heater; and an estimating unit for estimating the surface temperature of the heater at the predetermined time on the basis of the operation information, the actual performance information, and the acquired surface temperature.