A control method for a mold opening/closing device including a hydraulic cylinder that opens and closes a mold, a hydraulic drive device that drives the hydraulic cylinder by supplying a hydraulic oil, and a controller that controls the hydraulic drive device, wherein the controller changes speed change in a deceleration region, in which movement of the hydraulic cylinder is decelerated, between a first half portion and a second half portion of the deceleration region, and causes speed change rate per unit time in the second half portion to be smaller than in the first half portion.

Disclosed is a method for manufacturing a container from a blank in a mold provided with a movable insert, wherein the method includes the following phases: pre-blowing; blow molding; boxing; and the following operations: measuring the prevailing pressure in the blank in real-time and storing the measurement in a memory; measuring the position of the insert in real-time and storing the measurement in a memory; detecting a time t.sub.S2 indicating the actual start of the blowing phase and moment t.sub.B2 indicating the actual start of movement of the insert and storing same in a memory; calculating T1=t.sub.S2−t.sub.B2; comparing T1 with a predetermined non-zero reference T1.sub.ref, as long as T1 is different from T1.sub.ref, and delaying the start of the boxing phase.

A blow molding machine for a resin container is provided with at least a blow molding section, a heating section, and a conveyance path for conveying a preform heated by the heating section to the blow molding section. The conveyance path is provided with a first conveyance member that is continuously and intermittently driven. The blow molding section is provided with a plurality of blow movable members. A plurality of conveyance driving sections for driving the first conveyance member are driven in synchronization with each other, and the blow movable members are driven in synchronization with each other.

There is provided a resin container manufacturing apparatus configured to stretch a preform disposed in a stretch blow molding mold by a stretching rod and stretch the preform by introducing blow air into the preform so as to form a resin container. The resin container manufacturing apparatus includes detection means for detecting an actual position of the stretching rod inserted into the preform, and supply control means for controlling a supply state of the blow air based on a detection result of the detection means.

In a blow-molding apparatus, a cooling device and a heating device are each driven by being supplied with electricity of a predetermined voltage from a supply power source. The blow-molding apparatus comprises: a monitoring device configured to constantly monitor fluctuation of the predetermined voltage; and an output automatic control mechanism configured to, in a case where the predetermined voltage monitored by the monitoring device fluctuates beyond a normal range, automatically fluctuate an output of at least one of the heating device and the cooling device to keep the output in a certain range, thereby adjusting at least one of the preform temperature and the ambient temperature to fall within a normal temperature range.

A method for producing a container from a blank, inside a forming unit having a mold and a movable insert controlled by a variable-flow solenoid valve, a control unit linked to the solenoid valve. The method comprises developing a boxing curve characterizing the successive positions of the insert; determining, based on a reference blowing curve, points of inflection; measuring, on the boxing curve, distances actually travelled by the insert between points in time, some of which correspond to these points of inflection; and comparing the values of the measured distances with nominal values. If there is a difference between a measured value and a nominal value, controlling, by the control unit, a modification in the flow rate setpoint of the solenoid valve for the next production cycle.

This information management method for a resin molded product in a molding device for intermittently producing resin molded products includes: classifying the resin molded products into molded product groups for each molding cycle; acquiring an information group for each of the molded product groups; and recording the acquired information groups in association with the molded product groups.

A blow molding machine for a resin container is provided with at least a blow molding section, a heating section, and a conveyance path for conveying a preform heated by the heating section to the blow molding section. The conveyance path is provided with a first conveyance member that is continuously and intermittently driven. The blow molding section is provided with a plurality of blow movable members. A plurality of conveyance driving sections for driving the first conveyance member are driven in synchronization with each other, and the blow movable members are driven in synchronization with each other.

Disclosed is a method for manufacturing a container from a blank in a mold provided with a movable insert, wherein the method includes the following phases: pre-blowing; blow molding; boxing; and the following operations: measuring the prevailing pressure in the blank in real-time and storing the measurement in a memory; measuring the position of the insert in real-time and storing the measurement in a memory; detecting a time t.sub.S2 indicating the actual start of the blowing phase and moment t.sub.B2 indicating the actual start of movement of the insert and storing same in a memory; calculating T1=t.sub.S2−t.sub.B2; comparing T1 with a predetermined non-zero reference T1.sub.ref, as long as T1 is different from T1.sub.ref, and delaying the start of the boxing phase.

A method of operating a container treatment system, wherein a plurality of parameters of the container treatment system, which are characteristic for the treatment of containers in the container treatment system, are variable and wherein the parameters are each linked to at least one value characteristic of the containers to be treated, wherein for each parameter a plurality of reference parameter values are stored in a storage device, wherein at least one characteristic value of the containers to be treated is entered at a user interface and, on the basis of this entry and the stored reference parameter values, a combination of parameter values for the parameters is calculated.