Abstract: Method for the automatic control of the amount of active ingredient of tablets during the production in a rotary tablet press, which has a die table with die bores, upper and lower punches assigned to the die bores, a filling station, a metering cam for the lower punches in the filling station, at least one pressing station with at least one upper and one lower pressing roller, wherein at least the lower pressing roller is adjustable with respect to the other pressing roller by means of a pressing roller adjustment equipment, a metering cam adjustment equipment for height adjustment of the metering cam, a compression force measuring equipment at the pressing station, a control and operating computer and an active ingredient measuring equipment, characterized by the following procedural steps: during the tablet production, the amount of active ingredient of tablets is measured and values for the amount of active ingredient are compared with a predetermined desired active ingredient value in the control and ope

Abstract: An integrated system for production of composites includes at least one polyurethane unit with a mixing head for mixing a polyol component and an isocyanate component, at least one plasticizing and injection unit, which is suitable for the melting and subsequent injection of a thermoplastic material, and one clamping unit to receive at least one mold. The plasticizing and injection unit and the polyurethane unit can each introduce material to be processed into a mold cavity within the clamping unit. In order to implement a unitary strategy of control and regulation and a unitary approach to operation of this type of integrated system apparatus, a single central control unit and at least one common supply device are provided, with the central control unit being connected at least with the at least one supply device. The at least one common supply device acts at least on both the polyurethane unit and the plasticizing and injection unit.

Abstract: Methods and apparatuses are disclosed for applying melt flowable materials to components of articles of manufacture. The methods and apparatuses disclosed herein are concerned with formation of appropriate flowable materials, control over the manner in which the flowable materials are applied, treatment of the components prior to application of the flowable materials and the like. Moreover, the apparatuses and methods may be particularly suited for applying flowable materials to surfaces and components found in automotive, aerospace, and marine vehicles.

Abstract: A transcript apparatus has a vacuum-forming chamber 60 in which a transcription die 41 and a forming product 13 transcribed from the die 41 are disposed face to face with each other, a movable body 19 supporting one of the die 41 and the product 13 to allow the die 41 and the product 13 to be movable closer to or away from each other, a balance cylinder 50 placed in parallel to a moving direction of the movable body 19 and connected to the movable body 19 via a piston rod 52, a pressure detector 64 detecting a pressure inside the chamber 60, and a pressure control section 68 operative to control a pressure of working fluid supplied to the chamber 60 depending on an output from the pressure detector 64 to cancel fluctuation in load acting on the movable body 19 in the moving direction thereof.

Abstract: The present invention provides a method and system for controlling the quality of a product produced by an injection molding production process. The invention includes performing a multivariate analysis on injection molding process data collected real-time and determining whether the real-time data is within a predetermined production control limit. When the real-time production data exceeds the control limit, the process is considered out of control and product produced during the out of control condition is removed real-time from the injection molding production process.

Abstract: Suck back is started and a gradient of pressure (an amount of change in resin pressure while a screw or a plunger moves backward by a certain amount) is detected. Whether or not an absolute value of the detected gradient of the pressure is smaller than a reference value set in advance is determined, and it is determined that the reduction of the resin pressure has been completed when the absolute value becomes smaller than the reference value. A screw position at the time of the completion of the pressure reduction is stored and a screw movement amount from a suck back start position to a pressure reduction completion position is displayed on a screen.

Abstract: Torques and resin pressures applied to a screw are detected during the forward movement of the screw and coefficients of correlation between the detected torques and resin pressures are calculated. When the check ring is open, the flight of the screw receives resin pressure, and the screw torque increases proportionally to the resin pressure due to resin backflow, so the coefficients of correlation between the screw torques and the resin pressures are higher than a reference value. When the check ring closes, the flight of the screw no longer receive resin pressure, so the screw torque decreases and the coefficients of correlation become lower than the reference value. The check ring is determined to be closed when the coefficients of correlation become lower than the reference value.

Abstract: An extrusion system is provided including an extruder, a screen changer, an operator interface, and a controller. The system further includes a pressure sensor for detecting an extrusion flow pressure between the extruder and the screen changer. A method of ramping up an extruder is also provided including the steps of detecting a pressure upstream from an extrusion screen filter; comparing the upstream pressure to a user-defined threshold pressure; and increasing an extrusion output if the upstream pressure exceeds the threshold pressure.

Abstract: Rather than developing full closure tonnage for a substantial portion of the duration of an injection cycle, closed loop control of the clamp pressure (such as through control of hydraulic pistons) permits clamp pressure to balance exactly, but preferably slightly exceed, the instantaneous injection pressure. A first approach mimics the injection pressure profile with time, whereby applied tonnage is varied with time according to sensed pressure measurements. A second approach looks to pre-stored or historically accumulated injection pressure information and, instead of varying the tonnage, applies a constant tonnage reflecting the maximum recorded or most likely injection pressure to be experienced in the mold (as recorded stored in a look-up table associated with the particular mold configuration). A machine controller (80, 82) causes the application of applied tonnage through the platen (16, 17) and tie-bars (19, 20) of an injection molding machine (10).

Abstract: In a stack mold or Tandem® molding machine (10) of FIG. 1 that employs injection compression techniques, a separation (?1 and ?2) between hot halves (24, 26) and cold halves (28, 30) of first and second molds (15, 16) is controlled by sensed distance measurements between a centre-section carrier (17) and end platens (18, 20) on which the molds (15, 16) are mounted. First and second stroke cylinders (66, 68), under the control of machine controller (14) and subject to the sensed positions of the platens (18, 20), balance an injection compression stroke (FCLP) generated by a clamp assembly (48). Specifically, the stroke cylinders (66, 68) control a relative rate of closure between the two molds (15, 16) to provide, as appropriate, synchronous closure of the hot halves (24, 26) against the cold halves (28, 30).

Abstract: A diffractive microstructure is produced on the surface layer of a substrate using an embossing device. The embossing device includes an embossing roll and a backing roll for exerting an embossing pressure on the surface layer of the substrate. The embossing pressure and/or variations in temperature cause deflection of the embossing roll. To compensate for the deflection, the embossing device can set the embossing pressure exerted by the central area of the embossing roll on the surface layer of the substrate to be at least equal to or higher than the embossing pressure exerted by the end areas of the embossing roll on the surface layer of the substrate.

Abstract: A device (1) for treating containers (10) with a nozzle device (4) which fills the container (10) with a gaseous medium, wherein the nozzle device (4) can be introduced at least partly in a mouth (12) of the container (10). Furthermore a wall body (6) is provided which surrounds completely at least one area of the nozzle device in the peripheral direction, and a sealing device (8) to seal a space (R) between the container (10) and the wall body (6). According to the invention the sealing device (8) can be pressed in a substantially radial direction against the outer periphery of the mouth (12) of the container (10).

Abstract: In an injection molding machine having upstream and downstream channels communicating with each other for delivering fluid material to one or more mold cavities, apparatus for controlling delivery of the melt material from the channels to the one or more mold cavities, each channel having an axis, the downstream channel having an axis intersecting a gate of a cavity of a mold, the upstream channel having an axis not intersecting the gate and being associated with an upstream actuator interconnected to an upstream melt flow controller disposed at a selected location within the upstream channel, the apparatus comprising a sensor for sensing a selected condition of the melt material at a position downstream of the upstream melt flow controller; an actuator controller interconnected to the upstream actuator, the actuator controller comprising a computer interconnected to a sensor for receiving a signal representative of the selected condition sensed by the sensor, the computer including an algorithm utilizing a v

Abstract: The invention relates to an indentation apparatus (1) comprising a force frame (13) and a positioning frame (14). An indentation tool (5) is pressed into a work piece (7) in order to master a mould. The work piece (7) is supported by the base (6). An actuator (2) is mounted in the force frame (13). The actuator (2) and the indentation tool head (4) are connected with a rod (3). The rod (3) is fixed with flexible (swivel) joints (15) to said indentation tool (4) and said actuator (2) in order to physically decouple said force frame (13) and said positioning frame (14) from forces. Also a force sensor (9) is installed between the indentation tool (4) and the positioning frame (14). In order to keep the positioning frame unloaded, the balance force delivered by said force frame actuator (2) should be approximately equal to the indentation force. The signal of the force sensor (9) is interpreted by control electronics (10).

Abstract: The invention provides an injection molding machine injection unit that eliminates adverse effects on the load cell of belt tension due to belt drive. A load cell that detects resin pressure is mounted on a pusher plate and a rotation-transmitting member, on which an injection screw is fixedly mounted, is axially supported by an inner annular part of the load cell. The shaft of a pulley is axially supported on the pusher plate and coupled by splines to the rotation-transmitting member. A screw rotation motor is mounted on motor mounts of a housing mounted on the rear surface of the pusher plate. Tension on a belt run between the pulley and a pulley mounted on the motor output shaft concentrates a force at the base of the motor mounts. However, the housing is separate from the pusher plate and fixedly mounted on the pusher plate at a location other than that occupied by the base of the motor mounts.

Abstract: In a skin needle manufacturing apparatus 10, a material melted in a syringe 45 is discharged from a fine hole 47a of a pin member 47 and is caused to adhere to a base 48. A computer 50 causes a drive mechanism 48 to separate the pin member 47 from the base 48. Then, the material 80 having adhered to the pin member 47 and the base 48 is drawn out. A projection portion 48b formed of a part of the material 80, which has adhered to the base 48, is formed into a skin needle 81. Consequently, a skin needle can relatively easily be manufactured without requiring excessive time, effort, and cost.

Abstract: If a screw is moved forward after a metering step is completed, the screw moves in a state where a check ring on a tip end of the screw is in open state. Resin flows in a direction opposite to the injection direction. A rotational force is applied to the screw due to the backflow of the resin. If the check ring closes a resin passage, the rotational force acting on the screw is reduced. A peak time of the screw rotational force is detected as closing point in time of the check ring. Physical amounts such as a screw rotational force and a screw position at that timing are detected. Since the closing point in time of the check ring is precisely detected, correction of the injection/hold pressure switching position and the injection speed switching position can be adjusted more precisely. It is possible to precisely determine whether a molded article is non-defective or defective based on the detected physical amount.

Abstract: The invention relates to a method for continuously producing plastic tubes by biaxial drawing consisting in producing a blank (E) by extrusion, heating said blank to a molecular condensation temperature, radially dilating it by the internal pressure of a fluid applied between two axially distant obturator rings (7, 11) and in carrying out a calibration (8) and cooling (9) associated with an axial tension produced on a tube at the output thereof. A pressure opposite to the internal pressure is applied to the blank wall from the outside in at least one area which is exposed to the radial dilation. Said opposite pressure is selected such that it is lower than the internal pressure, thereby preventing a counteraction to said dilation and remaining sufficient in order to control the dilation growth in such a way that it is possible to ensure a substantially constant material thickness on the same circumference.

Abstract: A method, control system, computer program, and article of manufacture for controlling hydraulic press systems, and a new press system that utilizes a number of improvements over the assignee's original system. The control system is designed to control a hydraulic press having a die, at least two separate sets of workpiece forming punches, and at least two hydraulic pistons, each operatively associated with one set of workpiece-forming punches. The control system includes a means for controlling a magnitude of a pressing force applied by each set of workpiece-forming punches, and a means for controlling a position of each set of workpiece-forming punches relative to the die.

Abstract: An I.S. machine has a blow station where a parison is blown into a bottle. The parison is blown with a blow head at the “on” position on the blow mold and following the blowing of the parison, the blow head is lifted away from the blow mold. The spacing between the blow head and the mold is defined by a Pressure Profile which is responsive to the sensed pressure within the mold.

Abstract: An apparatus for regulating an injection moulding machine comprising a crank lever mechanism for moving the movable mould mounting plate, wherein the crosshead of the crank lever mechanism is driven by a drive device.

Abstract: In accordance with the invention, step-and-repeat imprint lithography is effected by applying balanced pressing forces from both sides of a substrate. The pressing forces are substantially equal in amplitude and opposite in direction. With the pressing forces thus balanced, the fixture that steps and holds the substrate does not bear the load of imprinting. The balance allows use of a high resolution aligning stage to carry the substrate and to maintain high accuracy of positioning without being shifted by change of load. With this method, sufficient imprint pressure can be used to obtain high quality patterning, a thin and uniform residual layer, and a high fidelity pattern.

Abstract: A clamping force sensor system includes a clamping force sensor device, a signal-converting program carrier, and an output device. The clamping force sensor device includes a body mounted to a tie bar of a forming machine. The clamping force sensor device further includes a sensor mounted to the body, with a portion of the sensor exposed outside of the body. The signal-converting program carrier is electrically connected to the sensor by at least one signal line. The signal-converting program carrier includes a built-in program for converting a signal from the at least one signal line into a mold-clamping force. The output device is electrically connected to the signal-converting program carrier for outputting the mold-clamping force.

Abstract: Powder press for the production of pressed articles of powder-shaped pressing material, having the following characteristics: a female mould plate with a least two female moulds or one female mould with at least two female die bores, at least two upper plungers, which co-operate with the female moulds and the female die bores, respectively, hydraulic cylinder for the upper plungers at least two bottom plungers, which co-operate with the female moulds and the female die bores, respectively hydraulic cylinders for the bottom plungers at least one position sensor for the upper plungers, and at least one position sensor for the bottom plungers force sensors for the individual hydraulic cylinders and a controlling means for the hydraulic cylinder or the hydraulic cylinders for the upper plungers and each one controlling means for the hydraulic cylinders for the bottom plungers.

Abstract: An apparatus for injection molding comprises an injection unit comprising a plunger, the plunger being translated with accumulation of plasticized material in preparation for injection and being advanced to inject the accumulated plasticized material into mold cavities. At least one electric motor is engaged with the plunger to resist translation as melt is accumulated and to inject plasticized material into the mold cavities. At least one hydraulic actuator selectably operates the plunger during a pack and hold interval to supply supplemental force when force supplied by the electric motors is limited to maintain the operation of the motors within the applicable continuous duty rating thereof. The electric motors are advantageously selectably operatively engaged with the plunger to inject plasticized material into the mold cavities and the hydraulic actuators are operated to inject plasticized material into the mold cavities when the motors are not engaged therefore.

Abstract: A controller of an injection molding machine which compensates a delay in an injection velocity changeover and a delay at the time of changeover to the pressure-holding process, and is capable of more accurate and stable injection velocity control and changing control from the injection velocity control to pressure control. In the injection process, a motion command is outputted in every sampling period ? according to the command injection velocity. When a screw position overshoots the set velocity changeover positions Psw(2) and Psw(1), a motion command based on a velocity command of the next interval is outputted from the next period. However, there is time lag between the point when the set changeover position is reached and the point when the motion command is changed after detection thereof. There generates a motion deficiency in a motion amount shown by mark A and overshoot shown by B.

Abstract: Disclosed herein is an injection mold for glass encapsulation, which has a variable support unit connected to a pressure control unit so as to support a glass panel with a constant force. The injection mold for glass encapsulation is constructed to put a glass panel between upper and lower molds and integrally form a mold along an edge of the glass panel. The injection mold includes a support unit supporting a lower portion of the glass panel and moving up and down along a support recess which is defined in the lower mold, a shock absorbing unit having a cylinder to press and support the support unit using elastic force, and a pressure control unit maintaining hydraulic pressure in the cylinder at a preset pressure.

Abstract: Disclosed is an injection unit (1) for an injection molding machine, comprising a screw (4) that is driven by means of a spindle drive (18). The spindle drive (18) is driven via an electric motor (6). Additionally, a force that acts in an axial direction is transmitted to the screw of the injection unit (1) via a hydraulic cylinder (38). According to the invention, a pump (48, 68) is driven via the electric motor (6). A pressure chamber (44) of the cylinder (38) can be supplied with more pressurizing means via said pump (48, 68) than is needed during an axial displacement of the plunger (36).

Abstract: A system for nano-imprint with mold deformation detector is disclosed for real-time monitoring of the deformation of the mold. An electrostatic plate capacitor is embedded in the mold, serving as the deformation detector. The capacitor includes two opposite metal film electrodes formed by silicon micromachining technique on opposite surfaces of the mold and connected by a metal lead. During imprinting, the mold is acted upon by an external force and deformation occurs, which induces change of distance between the metal film electrodes and thus variation of the capacitance of the capacitor. The amount of deformation of the mold can then be assessed by comparing the capacitance with a reference. Thus, real-time detection and monitoring of the deformation of the nano-imprint mold is realized. Also disclosed is a method for carrying out the real-time monitoring of the deformation of the mold.

Abstract: To provide a mold clamping apparatus able to suppress spout of a molding material from between mating faces of dies and to extend the lifetime of the dies. A mold clamping apparatus has a control apparatus deciding a distribution of a load divided by a plurality of tie bars based on information concerning to the die and controlling pressure of driving oil of a cylinder chamber of each cylinder for mold clamping independently to become a load having a determined distribution.

Abstract: An injection molding system includes an injection molding machine, a pressure valve, a flow ratio control valve, a frequency converter, and the flow ratio control valve, a motor controlled by the frequency converter, a hydraulic pump connected to the motor, and an injection molding machine controller for controlling the injection molding machine and the frequency converter. Injection molding conditions and procedures for controlling operation of the pressure valve and the flow ratio control valve are analyzed. The injection molding machine controller sets a maximum output frequency for the frequency converter and a maximum flow for the hydraulic pump, preventing inappropriate operation of a user and avoiding waste of energy. The injection molding machine controller further sets a maximum speed and a minimum speed of the motor and sets a maximum speed and a minimum speed of the hydraulic pump.

Abstract: An apparatus for processing molten material into a desired shape comprises a die or mold forming a cavity to receive molten material and to allow its solidification within the cavity. A source of vacuum is connectable to the cavity for sucking air out. A hollow after-pressure cylinder is in communication with the cavity so as to receive a portion of the material. The after-pressure cylinder has a first end for connection to the cavity, and a second, opposite end. In the region of the second end is a connection opening for connecting the vacuum source. An after-pressure piston is moveable in the after-pressure cylinder to press its portion of material into the cavity to compensate for any shrinkage of the material in the cavity. There is a drive for moving the after-pressure piston in its after-pressure cylinder into three different positions, i.e.

Abstract: A pressure measuring device for an injection molding machine having a plasticizing screw operated by a rotary drive and an injection drive includes a load detector having a deformation zone which forms part of a transmission member of the injection drive and is of reduced cross section, and a sensor. The deformation zone elastically deforms in response to a driving force acting on the transmission member, with the sensor measuring a change in shape of the deformation zone.

Abstract: A nozzle touch mechanism which does not allow an injection unit to move back by the force of inertia at the time of acceleration of injection and prevents leakage of the molten resin. A damper is arranged between the injection unit and a stationary platen secured to a base, so as to generate a strong braking force only at the time of high acceleration of the injection unit. A ball screw is rotated by driving an electric motor to move forward a nut member screwed onto the ball screw, whereby the injection unit is moved via a spring. When the injection unit is stopped by contacting a nozzle to a metal mold, the spring is contracted. When the amount of contraction of the spring reaches a predetermined value, the motor is stopped and locked such that the nozzle touch force corresponding to the amount of contraction of the spring is generated.

Abstract: A controller of injection molding machine capable of stabilizing a peak pressure of resin appearing when an injection process is switched to a pressure-holding process, by reducing the variation of the peak pressure. Resin pressure Pr is detected at every predetermined sampling period ?t. There is a time lag between the time at which the resin pressure reaches an injection/pressure-holding switch determining resin pressure P(v?p) and the sampling time t2 at which the resin pressure that has reached the value P(v?P) is detected. Hence, a difference Ve between the detected resin pressure value Pr? and the switch determining resin pressure P(v?p) is obtained. The transition time period T in which pressure should be changed from a pressure-holding start pressure Ps to a pressure-holding pressure Pp is corrected by T=T0??×Ve to make the transition time period T shorter when the difference Ve is greater, to thereby hold down the peak pressure Pmax. By this, the variation ?Pmax of the peak pressure Pmax is reduced.

Abstract: A controller for an injection molding machine capable of reducing an extension of a cycle time in a screw retreat process after the end of measurement, obtaining a more accurate and uniform measured resin amount, and determining measurement conditions in a short period of time. After the measurement is finished, the screw is stopped from rotating and retreated at a first speed V1. The screw is reversely rotated at a predetermined speed Rv in a set zone. As this is done, the screw is retreated at a second speed V2 lower than the first speed V1. After the reverse rotation zone is terminated, the screw is stopped from rotating and retreated at a third speed V3 to a set retreat stop position. By doing this, the cycle time can be made shorter than in the case where the retreat and reverse rotation of the screw are performed separately. Since the retreating speed of the screw is low while the screw is being reversely rotated, a sudden pressure change can be suppressed, so that precise measurement can be made.

Abstract: A control module is attached to a machine platen of an injection molding machine. The control module is coupled to at least one sensor that reports a value of a processing condition associated with an injection mold and is disposed within the injection mold. The control module is also coupled to at least one controllable device that varies the processing condition of the injection mold and is disposed within the injection mold. The control module collects and processes sensor output, and provides a control signal to at least one controllable device. A display interface module is linked to the control module. The display interface module accepts user-entered data set-points, provides the user-entered data set-points to the control module, and collects the processed sensor output from the control module for display to a user.

Abstract: A method and system for controlling a fluid-assisted injection molding process for producing a molded plastic article. The fluid can be gas, water or another fluid. One or more pressure transducers are positioned in the mold cavity and generate signals to control the initiation of the pressurized fluid, the packing of the material in the mold and/or the switchover from the packing phase to the holding phase. The transducers can be positioned at or near the gate or pre-gate, at or near the fluid channel area, and/or at or near the end of the fill area.

Abstract: An encapsulation machine utilizes servo-driven components and a control system to control the encapsulation machine. Servomotors drive the fill supply mechanism, the die rollers and the casting drums. The control system uses a programmable controller to establish relationships between the servo and non-servo-driven components of the machine and a virtual gear to facilitate and automate the operation of the encapsulation machine.

Abstract: A control system for continuous rubber molding apparatus comprising; a feed portion for feeding a rubber material previously removed of foreign substances or particles in the previous step; an extruder for kneading the fed rubber material and feeding forward the kneaded material; and a gear pump for delivering the rubber material, fed from the extruder, to a forming nozzle, the forming nozzle continuously extruding a rubber ribbon used for building a tire. The control system comprises: a pressure sensor for sensing a pressure in the gear pump; pressure comparator for comparing a sensed pressure and a set value; and motor controller for controlling the number of revolutions of a motor based on a comparison result given by the pressure comparator, the motor operative to drive a screw of the extruder.

Abstract: The invention is a pressure reducing valve for reducing the pressure supplied to a head tooling hydraulic positioning valve and a controller for bypassing the pressure reducing valve in a blow-molding machine. A pressure-reducing valve and electrical controller are used to regulate the pressure of a cylinder that controls the position of a head tooling pin and die assembly in a blow-molding machine. The invention reduces pressure during all time intervals except during a “parison formation” interval of the cycle. The invention is also a process for regulating the pressure of a cylinder that controls the position of a head tooling pin and die assembly in a blow-molding machine and for bypassing the pressure reducing valve in a blow-molding machine.

Abstract: There is provided an injection molding machine provided with an injection mechanism that enables a high-speed injection.

Abstract: Method and apparatus are provided for sealing interfaces within an injection mold having a first surface and a second surface includes an active material actuator configured to be disposed in a manner suitable for generating a force between the first surface and the second surface. The active material actuator is configured to generate a force in response to sense signals from a transmission structure. Methods and apparatus are also provided for centering a nozzle tip within a gate opening, and adjusting tip height of a nozzle tip with respect to a gate opening, also using active material inserts.

Abstract: A device is provided for transferring a pattern to an object. The device may be used for transferring a pattern, such as micro- or nanostructures, from a stamp to an object. In accordance with one embodiment, the device comprises a first contacting means with a receiving surface for the stamp and a second contacting means with a receiving surface for the object. The device may further include a pressing means that is adapted to operate at least one of the contacting means for contacting the stamp with the object. One of the contacting means may include a base and a holder. The holder has a first end which defines one of the receiving surfaces and a second opposite end which is pivotally connected to the base in such a manner that the stamp and the object are automatically placed in a parallel position when contacting each other.

Abstract: An injection molding machine comprises a pre-pressure addition means 2 adding a pre-pressure B acting in the opposite direction of a molding material pressure A received by a screw 1 to a detection means 3 and/or the screw 1, the detection means 3 detecting the axial pressures A and B of the screw, and a screw movement control means 4 controlling the axial pressure based on a different between the pre-pressure B and the molding material pressure A, wherein the pre-pressure addition means 2 is made non-contact with the direction means 3, a forward and backward driving motor 17 is disposed adjacent to a heating cylinder 10, and a screw connector 21 at the rear end of the screw 1 is spline-connected inside a rotating rotor of a screw rotating motor 12. According to the machine, the molding material pressure received by the screw can be accurately detected without being affected by the wear of the machine so as to properly control the axial pressure of the screw and to make the machine compact.

Abstract: A crosshead position Cf for obtaining a set mold clamping force is obtained based on a mold touch position Ct obtained in mold clamping process in immediately preceding molding cycle, and a crosshead is allowed to move to the position Cf. During that time, it is determined whether a load La of a servomotor for mold clamping operation which drives a toggle mechanism exceeds a judgment load Ls, and a crosshead position Ca when the load La exceeds the judgment load Ls is stored as a mold touch position. In the next molding cycle, a crosshead position Cf where the set mold clamping force is obtained is obtained based on this stored mold touch position.

Abstract: A cooling mechanism for cooling an electric driving part of an injection molding machine, includes a cooling part for cooling the electric driving part; and an actuating part actuated by being supplied an actuating fluid, the actuating fluid being in fluid communication with the cooling part. The actuating fluid may be used as a cooling fluid for cooling the electric driving part.

Abstract: A control system for an injection molding machine performs a molding cycle. The molding cycle includes a filling process for controlling an advancing motion of a screw of the injection molding machine, and a hold press process for controlling a pressure of a molten resin after the filling process. The control system includes retracting speed limit means for limiting a retracting speed of the screw to a predetermined retracting speed limit value after a pressure control in the hold press process begins.

Abstract: A screw is rotated at a set speed and retreated by performing back pressure control for keeping a resin pressure at a set pressure. When the retreat position of the screw reaches a change point set nearby a set metering completion position, the back pressure control for keeping the resin pressure at a set resin pressure is stopped. A command for positioning the screw at a metering completion position is output to position the screw at the metering completion position. At the same time, when a screw position reaches the change point, the screw is reversed by a set value at a set speed.

Abstract: The invention is concerned with a compression molding device (1) with a tool (3) generating at least a part of the work-piece geometry. At least one pressure measuring means (5) and/or at least one pressure space (4) is located directly below the work-piece associated surface (3.3) of the tool (3). Besides this, the work piece (3) selectively exhibits at least one first part (3.1) which is a tool template generating the shape of the work piece and a second part (3.2) forming the base body, wherein a measuring strip (6) is provided between the tool template (3.1) and the base body (3.2). As an optional refinement, the measuring strip (6) is an elastic intermediate layer with a smaller modulus of elasticity than the base body (3.2).