A method and system for co-injection molding of two molten plastic materials that allows monitoring and utilization of injection pressure and optionally melt pressure and/or flow front pressure during an injection run. A controller alters the injection pressure so as to achieve and maintain optimal or desired ratios of injection pressure, and optionally melt pressure and/or flow front pressure, of the two molten plastic materials. This allows for more precise part manufacture, including reducing the thickness of a skin or shell layer compared to a core layer of a molded part.

A molding machine management device that is able to couple to a molding machine includes a storage unit configured to store, in chronological order, numerical value information on a molding process when a molded product is molded by the molding machine and four-factor information on four factors of production which includes a man, a machine, a material, and a method when the molded product is produced, and an output control unit configured to classify the numerical value information into a plurality of groups for periods divided according to time when the four factors of production changes, and output the numerical value information classified into the plurality of groups to an output unit in group units.

Systems and approaches for controlling an injection molding machine having a mold forming a mold cavity and being controlled according to an injection cycle include obtaining a pattern for the injection cycle, operating the injection molding machine to inject a molten material into the mold cavity, and measuring a cavity pressure value of the mold cavity during the mold cycle. Upon measuring a nominal cavity pressure value, a pattern recognition portion of the injection cycle that is at least partially dependent on the obtained pattern commences where a driving force being exerted on the molten material is adjusted such that the measured cavity pressure matches the obtained pattern for the injection cycle.

Provided is an apparatus for taking out a molded product, which is capable of determining occurrence of a suction error and/or likelihood of a suction error of the molded product with high accuracy and of knowing a cause thereof. A pressure data storing section stores time-series pressure data from a pressure detector. A suction error cause determining section determines occurrence of a suction error and/or likelihood of a suction error of a molded product by a suction member on a basis of a time-series comparison result obtained by comparing the stored time-series pressure data with predetermined time-series reference data. When the suction error cause determining section determines the occurrence of the suction error and/or the likelihood of the suction error, the suction error cause determining section determines a cause of the occurring suction error and a solution therefor based on a time-series change pattern.

Systems and approaches for controlling an injection molding machine having a mold forming a mold cavity and being controlled according to an injection cycle include obtaining a pattern for the injection cycle, operating the injection molding machine to inject a molten material into the mold cavity , and measuring a cavity pressure value of the mold cavity during the mold cycle. Upon measuring a nominal cavity pressure value, a pattern recognition portion of the injection cycle that is at least partially dependent on the obtained pattern commences where a driving force being exerted on the molten material is adjusted such that the measured cavity pressure matches the obtained pattern for the injection cycle.

A method for monitoring the hydraulic supply system of a plastic processing machine. In order to monitor the state of the hydraulic system without great effort, the method includes the following steps: a) Prior to operation of the machine: Determination of the nominal flow rate of a hydraulic pump as a function of an operating parameter of the hydraulic pump and determination of the nominal displacement speed of the hydraulically driven axis when a piston-cylinder element is acted upon by a predetermined nominal flow rate; b) During operation of the machine: When the hydraulically driven axis is operated: measuring the at least one operating parameter of the hydraulic pump as well as the actual displacement speed of the hydraulic axis and comparing the actual displacement speed with the nominal displacement speed resulting from the previously measured operating parameter of the hydraulic pump, and outputting the result of the comparison.

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.

A method and system for co-injection molding of two molten plastic materials that allows monitoring and utilization of injection pressure and optionally melt pressure and/or flow front pressure during an injection run. A controller alters the injection pressure so as to achieve and maintain optimal or desired ratios of injection pressure, and optionally melt pressure and/or flow front pressure, of the two molten plastic materials. This allows for more precise part manufacture, including reducing the thickness of a skin or shell layer compared to a core layer of a molded part.

A plasticizing apparatus, includes: a drive motor; a rotor that is rotated around a rotation axis by the drive motor and that has a groove forming surface on which a groove is formed; a barrel that has a facing surface facing the groove forming surface and that includes a communication hole in the facing surface; a heating portion that heats a material supplied to between the groove and the barrel; and a controller that controls the drive motor and the heating portion to plasticize the material supplied to between the groove and the barrel and discharge the material from the communication hole, the facing surface includes a first region and a second region that is closer to the communication hole than is the first region, the controller controls the heating portion to set a temperature of the second region to be higher than a temperature of the first region, and the controller controls the heating portion to reduce a temperature difference between the first region and the second region when the material includes a crystalline resin as compared with a case where the material includes an amorphous resin.

A molding machine is provided with a basic information setting function unit for setting basic information including resin data relating to pellet material, screw data relating to screw, and molding condition data relating to molding conditions, computation processing function unit comprising a provisional plastication time computation processing unit for calculating a provisional plastication time from the basic information, a melt film heating amount computation processing unit for calculating a heating amount of a melt film from the provisional plastication time obtained from the provisional plastication time computation processing unit, and a plastication delay time conversion processing unit for converting the heating amount of the melt film obtained from the melt film heating amount computation processing unit into a plastication delay time, and an output function unit for outputting plastication delay time or plastication information obtained based on the plastication delay time.