An injection molding machine includes a plasticizing unit having a plasticizing cylinder and a material-conveying device that is movable in the plasticizing cylinder and powered by a material-conveying drive, a material-conveying drive control, which is coupled with the material-conveying drive and is designed to control operating parameters of the material-conveying drive, a closing unit having an injection molding tool that is connected with an outlet nozzle of the plasticizing cylinder, as well as a closing unit control, which is coupled with a closing unit drive of the closing unit and is designed to control operating parameters of the closing unit drive. The injection molding machine further includes one or more dieletric or acoustic sensors which are disposed in the cavity of the injection molding tool or close to the cavity of the injection molding tool and are designed to determine the dielectric polarizability, mobility of free load carriers and/or acoustic material responses of a molding material in the cavity of the injection molding tool. A sensor control is coupled with the dielectric or acoustic sensor(s) and is designed to ascertain a time-dependent degree of crystallization and a time-dependent median temperature of the molding material in the cavity of the injection molding tool from the dielectric polarizability, mobility of free load carriers and/or acoustic material responses determined by the dielectric sensor(s) and, depending on the ascertained degree of crystallization and the ascertained median temperature, to actuate the material-conveying drive control and/or the closing unit control to adjust the operating parameters of the material-conveying drive and/or of the closing unit drive.

A resin molding device includes: a lower mold on which a substrate is placed; an upper mold in which a cavity is formed by a side block and a cavity block provided so as to be capable of ascending and descending vertically with respect to the side block; a clamp mechanism which clamps the lower mold and the upper mold; a transfer mechanism which supplies a resin material to the cavity by a plunger; and a controller which performs first final adjustment control for adjusting a clamp load of the clamp mechanism to a final clamp load after the cavity has been filled with the resin material supplied from the transfer mechanism and which performs second final adjustment control for driving the plunger after the first adjustment control has been completed and thereby adjusting a plunger load applied to the plunger to a final plunger load.

A mold clamping device includes: a fixed die having a fixed mold; a movable die having a movable mold; a toggle link coupled to a link housing placed opposite to the fixed die and the movable die, and changing a distance therebetween by a mold clamping motor; a tie bar coupled to the fixed die and the link housing; a tie bar nut screwed onto the tie bar and placed on the link housing; and a control device that, when performing mold clamping, brings the movable mold close to the fixed mold at a slow speed immediately before the both come into contact with each other, stops the mold clamping motor for a predetermined period when the movable mold and the fixed mold come into contact with each other, increases the rotation speed of the mold clamping motor after the predetermined period elapses, to perform mold clamping.

An injection molding apparatus includes an injection unit, a mold clamping unit, and a controller. The mold clamping unit includes a toggle fixing plate, a fixed mold attachment portion, a movable mold attachment portion movable in a mold clamping direction, a motor, a ball screw configured rotated by the motor, a crosshead configured to move between the toggle fixing plate and the movable mold attachment portion due to rotation of the ball screw, and a toggle section coupled to the toggle fixing plate. The movable mold attachment portion and the crosshead are configured to move the movable mold attachment portion. A position detector is configured to detect a position of the crosshead. The controller controls the position of the crosshead based on a detection result of the position detector to make the toggle section operate to perform the mold clamping of the fixed mold and the movable mold.

A predetermined mold gap is provided beforehand between a movable mold and a stationary mold of a mold by a mold clamping device. A mold clamping pressure is set to zero, and a predetermined back pressure is set for the movable mold. Subsequently, the injection device is caused to start injection of the molten resin into the mold for which the mold gap, the mold clamping pressure, and the back pressure have been set. When a predetermined injection end condition set beforehand is satisfied as a result of progress of an injection filling process, a filling end process of ending the injection filling process is performed.

A control device controls an operation of an injection molding machine that advances and retracts an ejector rod of an ejector unit. The control device is configured to set a plurality of operation modes including a first operation mode and a second operation mode in which the injection molding machine is operated. The control device sets, at different positions from each other, a first retraction position where the ejection rod retracts to and waits in the first operation mode and a second retraction position where the ejection rod retracts to and waits in the second operation mode.

A machine element for mounting a mold, in particular a mold mounting plate, for a tie-bar-less closing unit of a molding machine includes a plate-shaped base body and at least two pressure pad elements respectively designed as part of a hydraulic actuator, preferably a pressure pad, and have a longitudinal axis. The at least two pressure pad elements are offset transversely from one another with respect to at least one of the longitudinal axes, and for the at least two pressure pad elements at least one respective strut is provided, the strut connecting the respective pressure pad element to the base body.

A mold clamping device includes two mold platens; a ball screw mechanism connecting the mold platens to each other, the ball screw mechanism being provided with an axial force detector configured to detect an axial force acting on the ball screw mechanism; a servo motor provided on the ball screw mechanism and configured to drive the ball screw mechanism; and a control device configured to: monitor the axial force detected by the axial force detector during injection; and based on detecting an axial force increase, the axial force increase being an increase in the axial force, perform a mold clamping force increase control including driving the servo motor to increase a mold clamping force for tightening the ball screw mechanism.

An injection molding machine has a clamp that generates electromagnetic force and that secures a moving plate or a fixed plate using attractive force that is produced by the electromagnetic force; a pressure sensor that is provided in the clamp, wherein the pressure sensor measures contact pressure that acts between the moving plate or the fixed plate and the clamp; and a controller for performing a measure to prevent detachment of the moving plate or the fixed plate based on the contact pressure.

An injection molding apparatus includes an injection unit, a mold opening and closing unit, and a control unit, the mold opening and closing unit includes a fixed mold attachment portion, a movable mold attachment portion, and a mold opening and closing motor, a first fixing portion that fixes a test piece is attachable to the fixed mold attachment portion, a second fixing portion that fixes the test piece is attachable to the movable mold attachment portion, and the control unit performs inspection control to inspect mechanical characteristics of the test piece by applying a compressive force to the test piece by moving the movable mold attachment portion in a mold clamping direction with respect to the fixed mold attachment portion or applying a tensile force to the test piece by moving the movable mold attachment portion in a mold opening direction opposite to the mold clamping direction with respect to the fixed mold attachment portion in a state where the first fixing portion attached to the fixed mold attachment portion fixes a first portion of the test piece and the second fixing portion attached to the movable mold attachment portion fixes a second portion of the test piece different from the first portion.