Abstract: A closing element, which has an open position and a closed position and is actuated by an actuating element, is arranged in the nozzle channel of a nozzle body. In the closing position, the closing element separates a region that is at least temporarily in open communication with the injection mold, the region being able to be influenced by a second actuating element associated with the nozzle body. Due to the fact that the pressure element is arranged in the nozzle body and can be actuated independently from the nozzle body and the plastifying cylinder, a nozzle body is created and a method is provided that enable the dosing process and dwell pressure process to be separated with a compact structure.

Abstract: A closing device for a mold closing unit includes: at least one hydraulic pressure cylinder unit for generating a mold closing pressure on an injection mold which is accommodated in a mold clamping chamber; a pressure piston disposed in the pressure cylinder unit, a piston rod of the pressure piston is disposed along a central axis of the pressure cylinder unit, and the pressure piston separates a high-pressure chamber of the pressure cylinder unit from a low-pressure chamber thereof; an hydraulic driver cylinder, associated with the pressure cylinder unit, for closing the injection mold assembly, which drive cylinder is disposed concentrically relative to the central axis, and an actual cylinder of the drive cylinder is formed by the pressure piston of the pressure cylinder unit; and an hydraulic compensating cylinder, associated with the pressure cylinder unit, for receiving or respectively dispensing hydraulic medium, which comes from the pressure cylinder unit or respectively is to be dispensed to said pr

Abstract: A mold height adjustment device for modifying the distance between the stationary mold carrier and a support element by means of a drive mechanism is provided in a plastic injection molding machining. A locking device locks the support element in its respective position. A release position is provided in the area of movement of the moving mold carrier, which unlocks the locking device when the moving mold carrier is in the release position, thereby providing a mold height adjustment device and a method for actuating the device, which advantageously uses the elements moving on the machine for its actuation.

Abstract: A sealing device (12) is provided for the cyclical opening and closing of the injection mould (M) and for applying the sealing force on a mould sealing unit on an injection moulding machine for the working of plastics. The sealing device is supported on a support. A high resolution surface deflection sensor (13) is provided as sensor means for recording the tool securing force and the sealing force, which is arranged on the support for the sealing device (12). A simple, economic and reliable measuring system is thus achieved, which can record the forces throughout the whole cycle.

Abstract: A device for carrying out a two-stage, linear movement as well as an associated method for displacing a displaceable structural unit relative to a stationary structural unit. A first drive unit drives a shaft, which is in operative connection with a tube, which is connected to the displaceable structural unit. If a predeterminable condition is substantially achieved, a switch is made from the first drive unit to a second drive unit.

Abstract: A drive unit for a machine comprising a plurality of linear motors, which are disposed parallel to each other in a common direction of feed, the parts of the linear motors with the same action being interconnected for common displacement, wherein the linear motors include magnetic elements in the direction of feed and coil elements communicating therewith, wherein at least one power unit is associated with the linear motors, wherein force determining means are provided for determining the path-dependent force of the linear motors at least during assembly or commissioning and in that, in the operating state, a controller regulates, to a required characteristic, the power which is supplied to the linear motors by the power unit in dependence on the force, which is dependent on the path position of the linear motors and is determined by the force determining means.

Abstract: Eigensolutions for use in determining the profile of a structure formed on a semiconductor wafer can be approximated by obtaining a known set of eigenvectors associated with a first section of a hypothetical profile of the structure, where the known set of eigenvectors is used to generate a simulated diffraction signal for the hypothetical profile. A known characteristic matrix associated with a second section of a hypothetical profile is obtained, and an approximated set of eigenvalues for the second section is determined based on the known set of eigenvectors associated with the first section and the known characteristic matrix associated with the second section.

Abstract: In an injection molding machine the injection molding unit and the mold closing unit are at least are at least partially operated by electrical drives in form of a linear motor. The rotor and the stator have cylindrical surfaces which are arranged concentrically. The stator windings are symmetrical to the motion axis of the linear motor. Several equally acting first cylindrical surfaces are interleaved with a corresponding number of equally acting other cylindrical surfaces and are respectively operated together for operative connection. This results in a linear motor that is able to provide the advance forces required for injection molding.

Abstract: The invention relates to a drive unit for a machine, especially an injection press. Said drive unit comprises several linear motors (L1, L2) parallel to each other in a common advance direction (a-a), said motors having equally acting members which are mutually connected for common motion. Said linear motors (L1, L2) comprise magnetic elements (23, 24) in the advance direction as well as coil elements (26, 27) co-operating with the magnetic elements. According to the invention, force determination means (40) for determining the path-dependent force of the linear motors (L1, L2) are installed at least during assembly or initial operation and a controller (41) is used during operation for setting the power delivered to the linear motors (L1, L2) by the power part to a desired characteristic on the basis of the force depending from the linear motor position determined by the force determination means, whereby a smooth force characteristic can be obtained.

Abstract: A closing element, which has an open position and a closed position and is actuated by an actuating element, is arranged in the nozzle channel of a nozzle body. In the closing position, the closing element separates a region that is at least temporarily in open communication with the injection mold, the region being able to be influenced by a second actuating element associated with the nozzle body. Due to the fact that the pressure element is arranged in the nozzle body and can be actuated independently from the nozzle body and the plastifying cylinder, a nozzle body is created and a method is provided that enable the dosing process and dwell pressure process to be separated with a compact structure.

Abstract: In a mold-closing unit a device for variably fixing the spacing between the stationary mold carrier and moveable mold carrier is provided, which device comes into operational connection with a guide element to fix a set spacing. Associated with the moveable mold carrier is a fixing device which, on actuation, fixes the moveable mold carrier in its respective position. The drive for moving the moveable mold carrier itself alters the spacing along a portion of the guide element when the fixing device is actuated and the clamping device is not operationally connected. Drive has at least two parts which are operationally connected with one another, of which one part is supported on a support element and the other part is connected to the moveable mold carrier. One of the two parts of the drive also extends in linear fashion in the closing direction during the closing movement as a linear movement means for the moveable mold carrier.

Abstract: A closing device for a mold closing unit includes: at least one hydraulic pressure cylinder unit for generating a mold closing pressure on an injection mold which is accommodated in a mold clamping chamber; a pressure piston disposed in the pressure cylinder unit, a piston rod of the pressure piston is disposed along a central axis of the pressure cylinder unit, and the pressure piston seperates a high-pressure chamber of the pressure cylinder unit from a low-pressure chamber thereof; an hydraulic drive cylinder, associated with the pressure cylinder unit, for closing the injection mold assembly, which drive cylinder is disposed concentrically relative to the central axis, and an actual cylinder of the drive cylinder is formed by the pressure piston of the pressure cylinder unit; and an hydraulic compensating cylinder, associated with the pressure cylinder unit, for receiving or respectively dispensing hydraulic medium, which comes from the pressure cylinder unit or respectively is to be dispensed to said pre

Abstract: An injection molding machine is provided with a multi-piece machine base comprising at least two adjacently positioned components. A stationary mold carrier can be fixed to the one component of the machine base. To obtain an easy assembling which meets the demands during production, the components of the machine base can be connected underneath and in the vertical projection of the stationary mold carrier independently from each other.

Abstract: The invention relates to an injection molding machine that is provided with a protective cover that can be displaced from a non-protective to a protective position by way of a handle and that is used to cover the injection molding nozzle during the injection process. The protective cover is axially configured in a substantially parallel position with respect to the axis of injection and can be displaced to a protective position. The protective cover comprises a lower part on which an upper part is mounted so as to be swiveled about a substantially parallel swivel axis with respect to the axis of injection. The lower part and the upper part can be displaced together to a non-protective and to a protective position, thereby combining a reliable support of the protective cover with accessibility of the nozzle and the plastification cylinder.

Abstract: The invention relates to an injection molding machine having a plurality of modular drive groups which are arranged on the injection molding side and on the mold closure side. According to the invention, at least one of the drive groups is connected to the injection molding machine via at least one multifunction element which, as an interface, makes it possible to optionally connect different types of drives, e.g., electromechanical drives, hydraulic drives, pneumatic drives, linear motors or electromagnetic drives as a drive group in an otherwise unmodified injection molding machine. Independent of the respective drive, space for the respectively used drive groups is provided on the injection molding machine in order to accommodate each type of drive. As a result, the structural requirements for an increased modularity are accomplished by using components which, to a great extent, are identical.

Abstract: A method is proposed for evaluating injection-molded parts, produced in an injection-molding machine, as a good molding or a bad molding. The method includes determining a respective curve of a first parameter (y), which curve indicates changes in the first parameter (y) as a function of a prescribed second parameter (x). The determining operation is performed during a plurality of injection-molding operations wherein non-defective good moldings are produced, to form a group of curves. The group of curves is averaged to form a mean value curve (M2, M3), which curve indicates a mean value of the curves of the first parameter (y) for each value of the second parameter (x). A standard deviation is calculated in dependence on at least one parameter. A permissible range (T) of the at least one parameter is set along the mean value curve (M2, M3) on the basis of the calculated standard deviation.

Abstract: The invention relates to a mold closure unit for an injection molding machine comprising a first device provided for moving the moveable mold support on the stationary mold support in a direction to and from said stationary mold support. By connecting a second device, the first device comes in contact with its rotatable element and is decoupled from the induction flux. Additional inductions produced by the second device are transmitted to the moveable mold support via a force transmission element which is in the form of a pressure pipe. A switching chamber designed as a decoupling means which can be actuated by a hydraulic medium is arranged between the force transmission element and the supporting element, whereby, similar to the second device, the pressure in the switching chamber can be switched in any manner. As a result, a switchable transition between the first device and the second device is obtained.

Abstract: An injection-molding unit having an injection motor to activate an electromechanical injection unit for axial movement of the feed screw. An electromechanical rotary motor is provided to turn the feed screw independently of the axial movement. The rotary motor and the injection motor work via a first drive element and a drive element coaxial to the first drive element to make the feed screw move. To transmit the axial movement to the feed screw by linear movement of the injection unit, there is an axial bearing element directly between the first drive element and the other drive element. The axial bearing element is a force-transmission element, but at the same time allows the drive elements to rotate independently of one another and, if necessary, at the same time. This is a simple way of permitting compact coupling of the drive elements for dosing and injection on an injection-molding unit.

Abstract: In an injection molding unit for an injection molding machine, two electric drives are provided as electromechanical injection unit and electromechanical dosing unit, the axis of which are aligned with the axis of injection. A compact injection molding unit that is easy to assemble and maintain is achieved due to the fact that the first and second electric drives are disposed on the injection bridge on both sides of a separating plane that extends substantially crosswise to the axis of injection and separates the area of influence of the first electric drive from the area of influence of the second electric drive.

Abstract: A mold-clamping unit accommodates an injection mold. The mold clamping unit includes a mold clamping chamber and a clamping mechanism. A crank element with a crank guide defines a guide path curved away from the clamping axis and has a longitudinal extension substantially parallel to the clamping axis. A drive unit moves the extractor along the crank guide and has a driving movement substantially parallel to the clamping axis. A guide unit is connected to the drive unit and the extractor and is guided at two locations on the crank guide. The first end of the drive unit is pivotably attached to the crank element and the second end of the drive unit is attached with hinges to the guide unit. The driving movement moves the guide unit along the guide path for moving the extraction mechanism in and out of the injection mold.