Permanent mold and method for manufacturing a component

Abstract

Permanent mold (1) for producing a component (2) with at least two mold halves (3, 4) movable relative to each other between an open position and a closed position, wherein the mold halves (3, 4) each have at least one forming surface (5, 6) which, in the closed position of the mold halves (3, 4), define a cavity forming the component (2), and with a device for demolding the component (2) from one of the mold halves (3, 4), characterized in that the device for demolding the component (2) comprises at least one coil (23) electrically connected to a pulse generator (25), which is arranged in such a way in an area adjacent to the forming surface (5, 6) of at least one mold half (3, 4),that by transmitting a short current pulse from the pulse generator (25) into the coil (23), a time-varying magnetic field can be generated in the vicinity of the coil (23) and an opposing magnetic field in the component (2) made of an electrically conductive material, and that this creates a magnetic pressure force (31) acting on the component (2), by means of which the component (2) can be demolded from the mold half (3, 4) which receives the coil (23) when the mold halves (3, 4) are in the open position.

Description

[0001] The invention relates to a permanent mold for producing a component with at least two mold halves that can be moved relative to each other between an open position and a closed position, wherein the mold halves each have at least one forming surface which, in the closed position of the mold halves, defines a cavity forming the component and is equipped with a device for demolding the component from one of the mold halves.

[0002] Furthermore, the invention relates to a method for producing a metal component in a permanent mold with two mold halves that can be moved relative to each other between an open position and a closed position, wherein the mold halves each have at least one forming surface which, in the closed position of the mold halves, defines a cavity for forming the component, wherein, after the component has been formed in the cavity, the mold halves are moved from the closed position to the open position and the component is then demolded from one of the mold halves.

[0003] A device and a method of the type mentioned above are already in use and therefore belong to the state of the art. Fig. Figure 1 shows such a permanent mold, which is used as a die-casting machine for the production of cast components, especially from aluminum. Similar permanent molds and processes are also used for the production of components by hot forming.

[0004] The demolding system consists of numerous moving components, such as the pin-type ejectors, which directly contact the manufactured component during demolding and apply force. The system also includes other components, namely an ejector pin, ejector plates, an intermediate plate, support strips, and a return pin. The moving parts of the system are subject to wear, and components can break, particularly the ejector pins. The ejector pins can also become jammed or stuck on the component. This results in process disruptions and undesirable malfunctions in the operation of the device. The cooling channels and the ejector bores weaken the structure of the mold half.Furthermore, the tool design, the cooling design and the placement of special measures, such as squeezers for local post-compaction, are severely restricted by the bores required for the ejector pins.

[0005] From DE 698 03 450 T2, a method and a molding system with molds moved forward in a molding line for the production of castings are known. The casting is pulled or pushed out of the casting cavity at a removal station by an engagement element. The engagement element can be designed as a hook that grips behind an edge of the casting or as a finger that moves the casting abruptly. The engagement element can also be designed as a suction cup or as an electromagnet.

[0006] CN 2 03 292 464 U discloses a method for manufacturing a cast component in which the casting is released from the mold by an electromagnetic oscillator / vibrator.

[0007] Furthermore, DE 10 2016 107 805 A1 discloses an injection molding process and an injection molding device for producing a hybrid component from a metal element and a plastic element with a magnet for demagnetizing the hybrid component.

[0008] DE 101 23 277 B4 further describes an injection molding machine with a stationary box and a movable box, in the inner surfaces of which coils are arranged in slot-shaped recesses and whose current direction and intensity are modulated via a control mechanism to generate magnetic attraction or repulsion forces between the boxes. The relative movement of the boxes leads to the closing, holding, and opening of the mold, whereby a control current is applied for initial closing, followed by an adapted current for holding, while a reverse current causes opening. Parallel guide rails with complementary guide slots and centering pins serve for precise guidance, and an elastic buffer device with an air or oil pressure insert and an electromagnetic valve can be provided for impact cushioning.Alternative control methods involve different current profiles at the front and rear coils to control the acceleration and deceleration of the moving box.

[0009] DE 36 33 775 A1 further describes a magnetic piston motor in which the pistons are moved by selectively redirecting the magnetic flux of a permanent magnet head. This redirection is achieved via an iron guide piece with an excitation winding located in the head. When the coil is switched on, the piston is inserted into the head, and when it is switched off, the original magnetic force pushes the piston back out. The stroke motion is converted into torque via a crankshaft. The magnet head has a wide air gap between north and south, and the magnetic piston is pole-punched such that like poles prevent penetration. This allows for a long force path and the described operating sequence of switching, stroke, and ejection by reversing the flux path. The electrical pulse energy can be recovered by an alternator.

[0010] DE 102 29 060 A1 describes a clamping unit for injection molding machines that dispenses with conventional mold mounting plates and instead uses magnetic elements in the mold halves or surrounding frames. A stationary frame supported on the machine bed and a movable frame support the mold halves. The movable frame is moved by an electric motor via a rack and pinion system, and when a certain distance is reached, permanent magnets and energized coils pull the halves together. The polarity and current of the coils can be controlled, allowing the start-up process to be controlled and the frames to be moved apart by reversing the magnetic fields. Alternatively, the magnetic elements can be housed directly in the mold halves. Ferromagnetic bolts, acting as armatures in coil cores or elongated holes, serve for centering, and ejector pins can be electromagnetically actuated.

[0011] DE 691 25 719 T2 discloses a clamping unit and a method for clamping molded parts together in injection molding machines, in which ring-shaped electromagnetic coils arranged in mounting plates or directly in the molded parts generate the clamping force by controlled current supply. The movable mounting plate is positioned by means of a feed spindle, and gap sensors and position detectors allow control of the coil current so that the molded parts are initially brought together under medium pressure, a small gap can be left during injection, and subsequently the full clamping force is built up by increasing the current. The implementation includes measures for increasing the magnetic flux, for adapting to different mold thicknesses, for centering and shock absorption, as well as devices for demagnetization and a control system with rectification and constant current regulation.

[0012] US Patent 2012 / 0269917A1 further discloses a mold clamping device in which an electromagnetic unit between an attraction plate and a back plate generates an initial clamping force, amplifies this clamping force via a hydropneumatic force amplifier with two piston rods, and transmits the amplified force to the movable mounting plate, wherein a reaction force transducer is locked to the pull rods or a fixed structure to prevent the cylinder from being pushed back during amplification, and a control unit controls the sequence of approach with the linear drive, locking of the reaction force transducer, generation of the magnetic field to form the clamping force, pressure build-up in the hydropneumatic cylinder to amplify the force, holding during the molding process, as well as demagnetization and subsequent mold opening, while monitoring position sensors.

[0013] EP 0 233 113 A1 further describes an ejection and retraction system for injection or die-casting machines in which commercially available quick-release couplings with male and female parts reliably lock and release even with slight axial misalignments. At least one of the coupling parts is mounted on the carrier with limited relative mobility and pre-tensioned against a stop position by elastic restoring elements, creating both axial and radial play that allows automatic engagement despite misalignment. The embodiments show a cylindrical connecting shaft, an axle shaft mounted in a larger bore diameter, a disc assembly as a spring, a sleeve with a collar running around the partial bushing to limit the stroke, and rollers that engage in a groove of the male part and thus control locking and releasing.Various mounting options are presented, in each case where the movable side is optionally designed to be axially or radially flexible, and the descriptions explain the sequence of locking, holding during downward movement and controlled unlocking during upward movement.

[0014] WO 02 / 062 556 A1 describes an electric opening and closing device for injection molding machines, in which the closing of a movable mounting plate is achieved via a single ball screw drive arranged eccentrically to the machine's longitudinal axis, while the actual closing is effected hydraulically by short-stroke clamping cylinders with a large diameter. The movable mounting plate is guided on linear slide rails and connected at its underside to a ball screw nut, which is screwed via a connecting bracket to a disc spring assembly and a spring housing mounted in the bracket. The ball screw spindle is axially guided by bearing carriers with rolling bearings and driven by a servo motor via belts and pulleys, and the rotational position is detected by a rotary encoder.Before closing, the mounting plate is approached at a predetermined speed and position. Half-nuts connect the connecting rods to annular groove profiles. The hydraulic cylinders are then actuated to lock the mold. After the molding process, the magnetic and hydraulic signals are deactivated, the half-nuts are released, and the mounting plate is retracted electrically. The ball screw nut's mounting structure features circumferential clearance and a pre-tensioned disc spring, as well as fits that accommodate axial and radial deviations, ensuring that no direct shock load is transmitted to the spindle in the event of assembly inaccuracies or sudden impacts.

[0015] The JP H05 - 220 798 A also describes a magnetically acting mold clamping system for injection molding machines, in which the movable mounting plate is moved by means of a ball screw driven by a motor and ring-shaped coils are embedded in the mold halves, which are supplied by rectification and constant current control or by a single-phase, current-variable inverter, so that after closing the mold the coils are energized to generate the required clamping load and are discharged by means of a demagnetizing current before opening.The key design approach is the division of each mold half into a mold core made of tool steel for the cavity, a magnetic pole section constructed from thinly layered silicon steel sheets, and a base part made of cast iron, whereby the pole sections are made of several segments and with concentric coils embedded in the pole, which significantly reduces the pole volumes compared to conventional designs while maintaining the same pole area, and allows for the use of common materials and more compact, lighter designs.

[0016] Against this background, the invention is based on the objective of providing a permanent mold for the production of a component with a demolding device, in which the wear and destruction of components of the device, the disruptions in operation as well as the restrictions with regard to the design of the tool or the mold half and the design of the cooling are minimized.

[0017] The invention further aims to provide a method for manufacturing a component in a permanent mold, which minimizes process disturbances during the demolding of the component.

[0018] The first problem is solved with a device according to the features of claim 1. Subclaims 2 to 6 relate to particularly advantageous further developments of the invention.

[0019] According to the invention, a permanent mold is provided in which the device for demolding the component comprises at least one coil electrically connected to a pulse generator, which is arranged in such a way in an area adjacent to the forming surface of at least one mold half that a time-varying magnetic field in the vicinity of the coil and an opposing magnetic field in the component made of an electrically conductive material can be generated by the transmission of a short current pulse from the pulse generator into the coil, and thereby a magnetic pressure force acting on the component is formed, by means of which the component can be demolded from the mold half receiving the coil in the open position of the mold halves.The component can consist entirely or partially of an electrically conductive material, particularly metal, or be designed as a hybrid component, consisting partly of an electrically conductive material, particularly metal, and partly of a plastic. In this case, the electrically insulating plastic can form a coating or sheathing over the electrically conductive material. The current pulse flowing through the coil, combined with the good electrical conductivity of the component material, generates a compressive force, also known as the Lorentz force, which repulses the component from the mold half. The force depends on the strength of the induced current pulse and the good electrical conductivity of the material used for the component. Therefore, aluminum is preferably used as the electrically conductive material.Due to their conductivity, metals other than aluminum, such as gold, silver, copper, and their alloys, for example brass, are also suitable. According to the invention, a metal with good electrical conductivity is defined as a metal with a conductivity σ > 30*10. 6Siemens per meter [S / m] is considered. The pulse generator provides the necessary short, high-current pulses with peak currents of up to several hundred kiloamperes [kA]. The current pulse flows instantaneously through the coil. The use of magnetic pulse technology creates a completely new approach to demolding components. Unlike the previously mentioned mechanical ejector, demolding is contactless. Therefore, the ejectors, ejector pin, intermediate plate, ejector plates, and return pin can be omitted. The elimination of mechanically moving parts prevents wear and minimizes process disruptions. The absence of ejector bores results in a more stable mold half structure and provides more space for the tool design, cooling system, and local recompression units.The permanent mold according to the invention can be used as a casting mold, for example for a die casting plant, for the production of metallic cast components or as a forming tool for the primary and / or secondary forming of components.

[0020] It proves particularly advantageous that the coil is designed as a flat coil. The flat coil is preferably made of copper and can have the shape of an Archimedean spiral or clock spring. The flat coil is oriented relative to the component such that the current flowing through the coil flows parallel to and opposite to the eddy currents generated in the component, resulting in a magnetic pressure force preferably oriented orthogonally to the flat coil, which thereby acts at an optimal angle on the component to be demolded.

[0021] In a particularly simple embodiment, the coil is arranged in a recess in the mold half that is open towards the cavity. The coil can be fixed in the recess in a particularly simple manner, especially by force-fit or form-fit. Using such an embodiment, components designed as hybrid components can be manufactured or demolded from the permanent mold, whereby the electrically insulating plastic coating or sheathing prevents electrical contact between the current-carrying coil and the electrically conductive material of the hybrid component.

[0022] An advantageous modification is achieved by arranging the coil in a recess in the mold half and separating it from the cavity by a cover element. This prevents the coil from coming into direct contact with the molten metal introduced into the cavity. The cover element is made of an electrically insulating material and prevents electrical contact between the coil and the molten metal or the solidified metallic component, as well as abrasion or wear of the coil caused by the molten metal moving at a high speed of approximately 60 m / s along the forming surface of the mold half and the coil. When manufacturing hybrid components, the cover element does not necessarily have to be made of an electrically insulating material.

[0023] An alternative embodiment provides for the coil to have an outer coating of an electrically insulating material. The coil can be completely covered with the coating, or the coating can be applied only to a surface of the coil facing the cavity. Furthermore, the coil can be coated either before or after it is positioned in the recess of the mold half.

[0024] In this context, it has proven particularly practical for the coating and / or the covering element to consist of an electrically insulating and / or temperature-resistant and / or wear-resistant, especially ceramic, material.

[0025] The second problem is solved by a method according to the features of claim 7. Subclaims 8 to 10 relate to particularly advantageous further developments of the invention.

[0026] According to the invention, a method is provided in which, for demolding the component, a short high-current pulse is transmitted into a coil arranged in one mold half, thereby generating a time-varying magnetic field in the vicinity of the coil. This field induces eddy currents in the component, which is made of a metal with good electrical conductivity and is fixed to the respective mold half. These eddy currents generate a magnetic field in the component that opposes the magnetic field in the coil, thereby creating a magnetic pressure force that repels the component from the mold half and demolds it from the mold half containing the coil. This minimizes or completely prevents process disturbances during demolding of the component caused by mechanically moving parts.

[0027] It proves particularly advantageous that the high-current pulse is generated by a pulse generator, which is electrically connected to the coil. The pulse generator makes it possible to generate a current pulse with a required peak current of up to several hundred kA, which flows instantaneously through the coil.

[0028] A particularly advantageous refinement of the process is achieved by holding the component in place during demolding from the mold half containing the coil using a handling device. This handling device, whether a robot or manipulator, grasps the manufactured component either during or after the mold halves have been moved into the open position and holds it during demolding, preventing it from falling uncontrollably from the mold half. After demolding, the handling device then feeds the component to subsequent processing steps.

[0029] The invention allows for numerous embodiments. To further illustrate its basic principle, one of these is shown in the drawing and described below. This shows in Fig. 1 a schematic representation of a permanent mold known from the prior art for the production of a component with a movable and a fixed mold half; Fig. 2 a movable mold half with a device according to the invention for demolding the component from the mold half; Fig. 3 a schematic representation of the steps for demolding the component; Fig. 4 an exemplary current-time profile of a current pulse generated by a pulse generator; Fig. 5 an arrangement of the coil in the mold half in a first embodiment; Fig. 6 an arrangement of the coil in the mold half in a second embodiment; Fig. 7 an arrangement of the coil in the mold half in a third embodiment.

[0030] Fig. Figure 1 shows a permanent mold 1, known from the prior art and designed as a casting tool, for the production of a component 2, in particular for the production of a casting made of aluminum. In contrast to the illustrated embodiment, the permanent mold 1 can also be designed, for example, as a hot or cold forming tool or as a forging tool, etc.

[0031] The permanent mold 1 comprises at least two mold halves 3, 4, which are located between a closed position (not shown) and a position in Fig. The two mold halves 3 and 4, shown in Figure 1, are movable relative to each other in their open positions. Each mold half has at least one forming surface 5 or 6, which, when the mold halves 3 and 4 are in the closed position, defines a cavity that forms the component 2 to be produced.

[0032] At the in Fig. In the permanent mold 1 shown in Figure 1, the movable mold half 3 shown on the left is designed to be movable relative to the fixed mold half 4 shown on the right. The fixed mold half 4 has a mounting plate 7, a base plate 8, a mold plate 9 with cooling channels 10 and with the forming surface 6, as well as a sprue bushing 11 for supplying melt into the cavity between the two mold halves 3, 4 of the permanent mold 1.

[0033] The movable mold half 3 of the permanent mold 1 comprises a mounting plate 12, a base plate 13, ejector plates 14, support strips 15, an intermediate plate 16, and a mold plate 17 with cooling channels 18 and the forming surface 5. Furthermore, the mold half 3 has an ejector pin 19, guide bushings 20, a return pin 21, and several mechanical ejectors 22 arranged in openings in the mold plate 17 and opening into the forming surface 5. The ejector pin 19, the ejector plates 14, the intermediate plate 16, and the ejectors 22 together form a mechanical device for demolding the component 2 from the movable mold half 3.

[0034] After the melt has solidified, i.e., after component 2 has been formed in the cavity, the mold halves 3 and 4 are moved from the closed position to the open position. Here, component 2 is shrunk onto the forming surface 5 of the movable mold half 3 and fixed in place by shrinkage. By moving the ejector pin 19, the ejector plates 14, and the ejectors 22 towards component 2, a force is applied to the component through direct contact with the ejectors 22, thereby demolding component 2 from mold half 3.

[0035] Fig. Figure 2 shows a permanent mold 1 according to the invention with a fixed mold half 4 (not shown), which is identical to the one in Fig. 1 is formed as a fixed mold half 4 shown, and with a movable mold half 3, which extends from the movable mold half 3 in Fig. 1 differs significantly. The movable mold half 3 according to Fig. 2 comprises a mounting plate 12, a base plate 13, and a mold plate 17 with cooling channels 18 and a forming surface 5. When the mold halves 3, 4 are in the closed position, the forming surface 5, together with the forming surface 6 of the fixed mold half 4, defines a cavity between the mold halves 3, 4 of the permanent mold 1, forming the component 2 from an electrically conductive material. According to the invention, a coil 23, preferably made of copper, is arranged in the area of ​​the forming surface 5 of the movable mold half 3, which is preferably made of steel. The coil 23 is electrically connected to a pulse generator 25 via cables 24. The pulse generator 25 has at least one capacitor 26 and a switch 27, by means of which an electrical connection between the coil 23 and the capacitor 26 can be opened or closed.

[0036] After the electrically conductive material, in particular molten aluminum, is introduced into the cavity of the permanent mold 1, the component 2 is formed in the cavity and solidifies at least partially within the cavity of the closed mold halves 3, 4. To remove the component 2, the mold halves 3, 4 are opened. The at least partially solidified component 2 shrinks onto the forming surface 5 or onto the mold half 3 due to shrinkage and is thus fixed to it by force and / or form fit.

[0037] Based on the Fig. Section 3 explains in more detail the following steps for demolding component 2 from mold half 3. First, a robot gripper grasps and holds the component 2 to be demolded. This prevents the component 2 from falling out of the permanent mold 1 after demolding and allows it to be transferred to the subsequent processing steps. Step 2 involves transmitting a short high-current pulse (step 1) generated by pulse generator 25 and indicated by a direction arrow 28 into coil 23. This creates a time-varying magnetic field (magnetic field lines 29) in the vicinity of coil 23. Step 2 then discharges the stored energy of the charged capacitor 26 of pulse generator 25 abruptly through coil 23 by closing switch 27. Fig. Figure 4 shows an example of a current-time curve of a high-current pulse generated by pulse generator 25. Peak currents of up to several hundred kiloamperes [kA] are achieved. Peak currents of up to 1 megaampere [MA] can be provided using suitable pulse generators.

[0038] The time-varying magnetic field of the coil 23 induces eddy currents (step 3) in the component 2, which is shrunk onto the movable mold half 3 and is made of electrically conductive material. These eddy currents are represented by circular arrows 30. These eddy currents generate a magnetic field in the vicinity of the component 2 that opposes the magnetic field of the coil. The opposing magnetic fields create a magnetic pressure (step 4). As a consequence of this magnetic pressure, a directed magnetic force 31 acts on the component 2 (step 5), causing the shrunk-on component 2 to be demolded from the mold half 3 that holds the coil 23.

[0039] The magnetic pressure exerts a pressure force 31 on both component 2 and coil 23. However, since coil 23, made of copper, together with the movable mold half 3, made of steel, has a significantly higher mass compared to component 2, which is made of aluminum, component 2 is repelled or pushed away by coil 23 and mold half 3, and thus demolded. The magnetic pressure is proportional to the square of the coil current and exists only for the duration of the discharge of capacitor 26.

[0040] The coil 23 is preferably designed as a flat coil made of copper and can have the form of an Archimedean spiral. As in Fig. As shown in Figure 5, the coil 23 can be arranged and fixed in a recess 32 open towards the cavity in the area of ​​the forming surface 5 in the mold half 3. In an alternative embodiment according to Fig. 6. The coil 23 can also have an outer coating 31 made of an electrically insulating material, which prevents electrical contact between the coil 23 and the molten metal introduced into the cavity, symbolized by a droplet 33, or the solidified component 2. Another variation is described in Fig. Figure 7 shows that the coil 23 is arranged in a recess 32 in the mold half 3 and is separated from the cavity and the melt, symbolized as a droplet 33, or the solidified component 2 by a cover element 35. Both the cover element 35 and the coating 34 preferably consist of a ceramic material. Reference symbol list 1 permanent form 2 components 3 mold half 4 mold half 5 Shaping surface 6 Shaping surface 7 Mounting plate 8 Base plate 9 Form plate 10 Temperature control channel 11 Sprue bushing 12 Mounting plate 13 Base plate 14 Ejector plate 15 support strip 16 Intermediate plate 17 Form plate 18 Temperature control channel 19 ejector pins 20 guide bushings 21 Return pin 22 ejectors 23 coil 24 cables 25 Pulse generator 26 Capacitor 27 switches 28 Directional arrow 29 Magnetic field line 30 arrows 31 Compressive force 32 Exclusion 33 drops 34 Coating 35 Cover element

Claims

[1] Permanent mold (1) for producing a component (2) with at least two mold halves (3, 4) movable relative to each other between an open position and a closed position, wherein the mold halves (3, 4) each have at least one forming surface (5, 6) which, in the closed position of the mold halves (3, 4), define a cavity forming the component (2), and with a device for demolding the component (2) from one of the mold halves (3, 4), characterized by, that the device for demolding the component (2) comprises at least one coil (23) electrically connected to a pulse generator (25), which is arranged in such a way in an area adjacent to the forming surface (5, 6) of at least one mold half (3, 4) such that by transmitting a short current pulse from the pulse generator (25) into the coil (23) a time-varying magnetic field in the vicinity of the coil (23) and an oppositely directed magnetic field in the component (2) made of an electrically conductive material can be generated and thereby a magnetic pressure force (31) acting on the component (2) is formed by means of which the component (2) can be demolded from the mold half (3, 4) receiving the coil (23) in the open position of the mold halves (3, 4). [2] Permanent mold (1) according to claim 1, characterized by , that the coil (23) is designed as a flat coil. [3] Permanent mold (1) according to claims 1 or 2, characterized by, that the coil (23) is arranged in a recess (32) in the mold half (3,4) that is open in the direction of the cavity. [4] Permanent form (1) according to at least one of the preceding claims, characterized by , that the coil (23) is arranged in a recess (32) in the mold half (3, 4) and is separated from the cavity by a cover element (35). [5] Permanent form (1) according to at least one of the preceding claims, characterized by , that the coil (23) has an outer coating (34). [6] Permanent form (1) according to at least one of the preceding claims, characterized by that the coating (34) and / or the cover element (35) are made of an electrically insulating and / or temperature-resistant and / or wear-resistant material. [7] Method for producing a component (2) in a permanent mold (1) with two mold halves (3, 4) movable relative to each other between an open position and a closed position, wherein the mold halves (3, 4) each have at least one forming surface (5, 6) which, in the closed position of the mold halves (3, 4), define a cavity forming the component (2), wherein, after the component (2) has been formed in the cavity, the mold halves (3, 4) are moved from the closed position to the open position and the component (2) is then demolded from one of the mold halves (3, 4), characterized by, that to demold the component (2) a short current pulse is transmitted into a coil (23) arranged in a mold half (3, 4) and thereby a time-varying magnetic field is generated in the vicinity of the coil (23), which induces eddy currents in the component (2) made of an electrically conductive material fixed to the respective mold half (3, 4), by means of which a magnetic field is generated in the component (2) opposite to the magnetic field in the coil (23) and thereby a magnetic pressure force (31) is formed, which repels the component (2) from the mold half (3, 4) and demolds it from the mold half (3, 4) which receives the coil (23). [8] Method according to claim 7, characterized by , that the current pulse is generated by a pulse generator (25) which is electrically connected to the coil (23). [9] Method according to claims 7 or 8, characterized by, that the pulse generator (25) generates a current pulse with a peak current of up to several hundred kA, which flows abruptly through the coil (23). [10] Method according to claim 7, characterized by , that the component (2) is held by a handling device during demolding from the mold half (3, 4) which receives the coil (23).

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