For each of different resins R, a zero shear viscosity no of each resin R is obtained by using a conversion function expression whose parameters are a melt flow rate (MFR) and a set temperature of a heating cylinder and is registered. Also, a purge resin required amount Wu corresponding to a viscosity difference d between the zero shear viscosity of of a former resin Rf and the zero shear viscosity os of a succeeding resin Rs is registered. When resin switching is performed, the zero shear viscosity of of the former resin Rf and the zero shear viscosity os of the succeeding resin Rs are obtained by inputting the MFR of the former resin Rf and the MFR of the succeeding resin Rs to a molding machine controller, the viscosity difference d between the zero shear viscosity of of the former resin Rf and the zero shear viscosity os of the succeeding resin Rs is obtained, an amount of a purge resin required for resin switching is obtained as a purge resin required amount Wu, and at least the obtained purge resin required amount Wu is displayed.

For each of different resins R, a zero shear viscosity o of each resin R is obtained by using a conversion function expression whose parameters are a melt flow rate (MFR) and a set temperature of a heating cylinder and is registered. Also, a purge resin required amount Wu corresponding to a viscosity difference d between the zero shear viscosity of of a former resin Rf and the zero shear viscosity os of a succeeding resin Rs is registered. When resin switching is performed, the zero shear viscosity of of the former resin Rf and the zero shear viscosity os of the succeeding resin Rs are obtained by inputting the MFR of the former resin Rf and the MFR of the succeeding resin Rs to a molding machine controller, the viscosity difference d between the zero shear viscosity of of the former resin Rf and the zero shear viscosity os of the succeeding resin Rs is obtained, an amount of a purge resin required for resin switching is obtained as a purge resin required amount Wu, and at least the obtained purge resin required amount Wu is displayed.

An injection molding machine includes an injection device including at least first and second injection units, and one mold clamping device. A molding material is injected into a first cavity space by the first injection unit, and a molding material is injected into a second cavity space by the second injection unit. The injection molding machine further includes a control device controlling the injection device and the mold clamping device, and a storage device storing a set time in advance. The control device starts injection of the second injection unit after elapse of the set time from a predetermined time point. The predetermined time point is a time point at which the first injection unit starts injection or an earlier time point. The set time is a delay time for delaying start of injection of the second injection unit from start of injection of the first injection unit.

A controller of an injection molding machine includes a detection part configured to detect whether or not a process in each process performed in the injection molding machine has started based on preset conditions in the process, and an output part configured to output waveform information representing a change of a performance value detected in the process or a subsequent process that is subsequent to the process when the detection part detects that the process has started.

The invention belongs to the technical field of integrated machining of lenses and provides an integrated injection-molding method for a lens and a lens formed by the integrated injection-molding method to overcome the defect of poor sealing performance of lenses in the prior art caused by separate assembly of the lenses during production. In the invention, a high-transparency polycarbonate material is purified to remove impurities and moisture; then, an integrated mold is debugged; a material plasticization and filling process, a temperature holding process and a cooling process are accurately controlled by means of an injection molding machine to realize integrated formation of a lens and a product body; and after being formed, the product body is processed, and performance is detected. In this way, the sealing performance of the lens is improved.

Performance of an injection molding machine is improved. The injection molding machine includes: a central controller centrally controlling an injection molding operation; a first injection apparatus performing an injecting operation of material, based on a first injection start signal output from the central controller; a second injection apparatus performing an injecting operation of material, based on a second injection start signal output from the central controller; and a mold clamping apparatus performing a mold clamping apparatus. The injection molding machine is configured to adjust a time difference between a first injection start timing of the material injected from the first injection apparatus and a second injection start timing of the material injected from the second injection apparatus.

Performance of an injection molding machine is improved. The injection molding machine includes: a central controller centrally controlling an injection molding operation; a first injection apparatus performing an injecting operation of material, based on a first injection start signal output from the central controller; a second injection apparatus performing an injecting operation of material, based on a second injection start signal output from the central controller; and a mold clamping apparatus performing a mold clamping apparatus. The injection molding machine is configured to adjust a time difference between a first injection start timing of the material injected from the first injection apparatus and a second injection start timing of the material injected from the second injection apparatus.