Abstract: An apparatus for the transport of parts in a multiple-die press is proposed, in which transverse arms supporting the workpiece are provided, which transverse arms are disposed longitudinally displaceably and pivotably on gripper rails.

Abstract: A method for controlling the drive of a hydraulic press and an associated device for carrying out the method are proposed, the piston/cylinder unit belonging to a press ram being driven via several hydraulic devices connected in series. Depending on the operating phase of the press, the hydraulic devices are here used as required either as hydraulic motors or hydraulic pumps, which effect a delivery of pressure medium into the respective cylinder chamber.

Abstract: A method and apparatus for injection molding. The injection molding machine includes a mold formed by a fixed mold half and a movable mold half cooperating with the fixed mold half for defining a mold cavity of the mold and a gate channel leading to the mold cavity. An injection piston is operatively associated with the mold cavity for pressing a melt via the gate channel into the mold cavity. A sensor device detects a melt front of the melt rising upstream of the mold cavity in a conveying direction of the melt at a predetermined detection height. The sensor device includes walls defining a measurement gap disposed at the detection height and extending transversely to the conveying direction of the melt. The measurement gap is at least partially penetrated by a fraction of the melt from the melt front when the melt front rises toward the mold cavity.

Abstract: A method for controlling a drive for a hydraulic press employed for at least one of forming and cutting sheets of metal. The method involves a press comprising: a press ram and at least one piston-cylinder unit operatively connected to the press ram and including a drive piston having an upper side and a lower side, the drive piston further comprising an upper cylinder chamber communicating with the upper side, and a lower cylinder chamber communicating with the lower side. The method comprises the step of pressurizing the drive piston with hydraulic medium on at least one of its upper side and its lower side for driving the press ram.

Abstract: Casting parameters in at least one of a feeding and mold-filling and squeezing phase are controlled during a casting step in a cold-chamber die-casting machine. The casting parameters are controllable as a function of travel of a casting piston longitudinally displaceable in a shot sleeve. The quantity of molten metal filled in within the shot sleeve is determined by precise metering using a stationary optical measuring device. The metering is accomplished by beaming a measuring beam through a filling port of the shot sleeve and reflecting the measuring beam on a surface of the molten metal. The transit time of the measuring beam and the reflected beam are measured to determine a filling level and quantity of molten metal filled in. A control system is provided which controls a movement of the casting piston and a start of each phase as a function of the filling level and the associated quantity of molten metal filled in.

Abstract: A diecasting machine includes a transverse member; a column passing through the transverse member; and a column nut mounted on the column and having an underface being in a face-to-face engagement with a surface area of the transverse member. The column nut applies, with its underface, pressure forces on the surface area of the transverse member. Such pressure forces are derived from forces generated in the diecasting machine, taken up by the column and transmitted by the column to the column nut. The transverse member has a measuring bore which is situated adjacent the surface area of the transverse member and which has an axis oriented transversely to the length dimension of the column. A measuring plug is accommodated in the measuring bore for detecting the pressure forces applied to the surface area by the underface of the column nut and for emitting signals representing magnitudes of the pressure forces.

Abstract: A method for the process control of a pressure diecasting machine, consisting of casting equipment (2) and a casting drive system (1), and an apparatus for carrying out the method are proposed. In order to regulate the movements both of the ram or drive plunger (8) in the pressing cylinder (7) and of the multiplier plunger (17) in the multiplier device (15) in each phase of the casting process, stepless devices (30, 31) measuring displacement and speed to determine the position or movements and also quick-adjustment servo-proportional valves (33 to 36) to regulate the movement both of the ram (8) and of the multiplier plunger (17) are provided.

Abstract: A computer implemented method of determining unacceptable deviations from process parameters associated with manufactured parts, for use with die-casting machines. The method includes entering in a data base empirically determined parameter values for the manufacture of good parts, constantly acquiring during a preproduction phase actual manufacturing parameter values as a set of parameters for each of a predetermined number of manufactured parts, testing the quality of the predetermined number of parts produced during the preproduction phase, classifying the acquired sets of parameters for each preproduction phase manufactured part as good or reject based on the testing, and storing the classified acquired sets of parameters for each preproduction phase manufactured part.

Abstract: A drawing device in a press is proposed which serves to draw shaped sheet-metal parts. In order to achieve optimum force support of the sheet holder (6), the pressure cheek (8) is regulated in a vertically adjustable manner by a four-point control system known per se. In addition to this, vertically adjustable bolts (7) having drives (15) are provided, in order to permit a specific local application of force to the sheet holder (6). This is controlled or regulated by displacement sensors (16) and force sensors (17).

Abstract: A station for aligning a stack or packet of sheet metal or plate bars to be transported to and unstacked at an unstacking station prior to being pressed or processed at a pressing or processing station. The alignment station includes a transporting carriage equipped with a chain conveyor system and a lifting and turning device as well as a stationary measuring system. The measuring system serves to detect the angular position of the sheet metal packet disposed on the transporting carriage and is composed of a rotatably mounted measuring ruler which is placed against the sheet metal packet by means of a pneumatic cylinder. The angular position is measured by way of an absolute value sensor installed at the pivot point of the measuring ruler and is compared with the desired value stored in a control system.