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.

A control device for an injection molding machine is equipped with a pressure acquisition unit that acquires a pressure of a resin inside a cylinder, a reverse rotation control unit that causes a screw to be rotated in reverse based on a predetermined reverse rotation condition so as to reduce the resin pressure after having moved the screw rearward to a metering position, a compensation amount calculation unit that calculates a compensation amount to be made with respect to the reverse rotation condition, based on the resin pressure inside the cylinder acquired by the pressure acquisition unit when the reverse rotation of the screw is stopped, and a predetermined compensation function, and a compensation processing unit configured to compensate the reverse rotation condition based on the compensation amount calculated by the compensation amount calculation unit.

An injection apparatus is configured to feed a molten resin into an injection molding section of an injection stretch blow molding machine. The injection apparatus uniformly melts a resin material while the duration from the time of starting plasticizing and kneading till completion of injection is shortened, thereby allowing the operation of the injection apparatus to fall within the time corresponding to the reduced injection molding process in the injection stretch blow molding machine. Thus, the molding cycle for a hollow body is reduced. In this context, at the start of the filling for each injection cycle, the injection apparatus starts plasticizing and kneading for generating the molten resin for injection in the next injection cycle.

Provided are an injection molding machine and an injection molding method. An injection molding machine includes: a plasticizing unit which rotates a screw to plasticize a molding material inside a plastication cylinder, and an injection unit. The injection unit has: a plunger reciprocally moving inside an injection chamber, and an injection driving device reciprocally moving the plunger. By driving the injection driving device to move the plunger backward and forward inside the injection chamber, and driving a rotary driving device to alternately rotate the screw in a normal rotation direction and a reverse rotation direction, the molding material is controlled to reciprocate between the plastication cylinder and the injection chamber.

An injection apparatus includes (a) a barrel; (b) a nozzle at a front end of the barrel; (c) a screw in the barrel; and (d) a drive assembly including: (i) a housing having a front end coupled to the barrel; (ii) a spindle in the housing and fixed to the screw; (iii) a first motor in the housing and having a hollow first rotor through which the spindle passes. The first rotor is coupled to the spindle for driving rotation of the screw about the axis. The drive assembly further includes (iv) a second motor in the housing axially rearward of the first motor. The second motor has a hollow second rotor through which the spindle passes. The second rotor is coupled to the spindle for translating the screw along the axis in response to rotation of the second rotor relative to the spindle.

Method for the quality control and/or tracking of an injection molded part produced in a production cycle using at least one processing machine of the plastic processing industry and a plastic processing facility, in which production devices or stations arranged upstream or downstream are connected together via a network. Each individual injection molded part or a specified number of injection molded parts is assigned a quality value composed of multiple quality values in that each device or station in the production chain ascertains or generates its own quality value and extends same by the transmitted values of each previous device or previous station and forwards same as the new quality value to the following device or following station or in that a separate collecting station, in particular a hardware and software (COQ chain of quality), requests the quality values, the device values and.or material values thereof, from the individual devices or stations or is transmitted thereto, and the collecting station puts said the values into correlation.

A control device for an injection molding machine including a cylinder into which a resin is supplied, a nozzle disposed at a distal end of the cylinder, and a screw that moves forward and rearward inside the cylinder, the injection molding machine performing metering of the resin while the resin is being melted inside the cylinder, by causing the screw to be moved rearward to a metering position, so as to keep the resin pressure at a metering pressure, includes a calculation unit configured to calculate a suck back distance or a suck back time period that achieves drawing in of a target volume of the resin inside the nozzle toward the cylinder, and a suck back control unit configured to cause the screw to be sucked back, based on the suck back distance or the suck back time period, after the screw has reached the metering position.

A control device for an injection molding machine including a cylinder into which a resin is supplied, and a screw that moves forward and rearward and rotates inside the cylinder, includes a suck back control unit that sucks back the screw based on a predetermined suck back speed and a suck back distance or a suck back time period, a pressure acquisition unit that acquires a pressure of the resin, a calculation unit which calculates a compensation amount of the suck back speed, based on a difference between the pressure of the resin at a time when sucking back is completed and a predetermined target pressure, and a speed determination unit that newly determines the suck back speed based on the compensation amount.

To provide an injection molding machine which includes: a melting unit including a screw rotating about a rotation axis and having a groove forming surface on which a groove is formed and a barrel provided with a communication hole in a facing surface facing the groove forming surface, and configured to plasticize a material to generate a plasticized material and make the plasticized material flow out of the communication hole; a heating unit configured to heat the melting unit; an injection nozzle in communication with the communication hole and configured to inject the plasticized material into a mold; an injection control unit including a cylinder coupled to the communication hole and a plunger; a pressure detection unit configured to detect a pressure of the plasticized material flowing into the communication hole; and a control unit. The control unit controls the injection control unit to execute, based on a detected value, at least one of a metering operation of metering the plasticized material in the communication hole in the cylinder, and an injecting operation of injecting the plasticized material in the cylinder into the mold via the injection nozzle.

A method of influencing a backpressure length and/or a screw return speed in an axially extending plasticizing cylinder of a plasticizing unit for an injection moulding machine including a plasticizing screw arranged displaceably and rotatably in a cylinder bore of the plasticizing cylinder. Metering of plastic granulate fed to the plasticizing unit is carried out in dependence on the desired backpressure length in the plasticizing unit, and the plasticizing unit is operated in underfed mode.