Mechanical ejector

Abstract

The invention relates to a device, in particular an inclined ejector (1), for demoulding a cast part (14) with an undercut (141) from a cavity plate (93) for a casting process or an injection moulding process (9), comprising: - a guide element (2); - an ejector element (3), which is guided in the guide element (2) in a translational sliding manner in a first direction, and has a first end which can be coupled to an ejector head (4); - a pushing element (5), which is guided in the guide element (2) in a translational sliding manner in a second direction, wherein the first and the second directions enclose a guide angle not equal to 0°; - a coupling mechanism (6), which is designed to mechanically couple translational movements of the ejector element (3) and the pushing element (5) in their first and second directions respectively; - a stabilising device (61), which is arranged between the first end of the ejector element (3) and the guide element (2), in order to reduce a deflection of the ejector element (3) transverse to the first direction of the translational movement of the ejector element (3) or transverse to the second direction of the translational movement of the pushing element (5).

Description

[0001] MECHANICAL EJECTOR

[0002] Technical area

[0003] The present invention relates to a device for demolding undercuts within plastic injection molding tools or within die-casting tools. Such a device is also referred to as an ejector device.

[0004] Background of the invention

[0005] When injection molding any type of injection-molded or die-cast part, it is necessary to remove the cast or injection-molded part from the tool, for which ejectors are used. The demolding of a cast or injection-molded part by means of a stroke or relative movement of the ejector(s) in relation to the tool plate(s), in particular to an ejector plate, represents the state of the art in this regard. The ejector plate is a displaceably mounted tool plate which, within an ejector device, transfers the stroke generated by an ejection cylinder to the ejector(s). Demolding can occur in a direction perpendicular or at an angle to the ejector plate. Ejectors known as straight slide ejectors act in a plane that is perpendicular, i.e. at 90° to the horizontal plane of the ejector plate.Ejectors known as inclined ejectors act in a plane that forms an angle of less than or greater than 90° to the horizontal plane of the ejector plate. For injection molds or die-casting molds that, due to the geometric shape of the part to be demolded, have certain areas with the aforementioned undercuts, demolding of the cast or injection-molded part is not possible solely through vertical relative movement of the straight slide(s) in relation to an ejector plate. It is therefore state of the art to use inclined ejectors for the process of demolding undercuts by a non-vertical relative movement of the inclined ejector(s) in relation to an ejector plate.

[0006] Ejector devices of this type, installed within the injection molding tool or die-casting tool, are activated at the moment of ejection by means of inclined ejectors, which can be rams. Inclined ejectors designed in this way are pushed forward by a hydraulic cylinder. The latter are also referred to as ejection cylinders and generate a stroke by means of which the inclined ejector, in several embodiments known from the prior art, moves through the tool in the forming direction of the injection mold or die-casting mold. The inclined ejector can be guided either by a sliding device or by means of feedthroughs, in particular by means of bores within the tool plates. An ejector device implemented using an inclined ejector is generallythe feedthrough is designed in such a way that it redirects the lifting movement of the inclined ejector in the forming direction into a direction of movement that is at an angle to it. Consequently, the inclined ejector moves in a plane that is at an angle greater than or less than 90° to the lifting direction of the ejection cylinder or an ejector plate. This angle, which is also referred to as the forming angle or demolding angle, is largely determined by the shape and angular position of the sliding device or the feedthrough within the tool plates. The angle that the respective undercut forms, in particular with respect to the ejector plate, is referred to as the undercut angle and can have a so-called negative geometric value, for example between minus 15° and 30° with respect to a horizontal plane, whereby this horizontal plane is parallel to the planum of the tool plates or the ejector plate.The undercut angle can alternatively represent a so-called positive geometric value, for example between plus 15° and 30° relative to the horizontal plane.

[0007] Ejector devices are known from the prior art in which no sliding device or guide for guiding an inclined ejector within tool plates is used. EP 2 899 010 B1 discloses such a device for demolding injection-molded parts using an inclined ejector within an ejector device, wherein the inclined ejector is mounted by means of a guide bushing and indirectly driven by an ejection cylinder via a rack and pinion gear. The ejection cylinder and the inclined ejector are indirectly connected to one another by the rack and pinion gear. The inclined ejector is designed as a rack in the section facing the second end; this section is referred to therein as the slide.This slide is frictionally guided in a first passage within the guide bushing and is in positive contact with a push rod within the guide bushing. For this purpose, the section of the push rod facing the first end is also designed as a rack. The push rod is also frictionally guided in a second passage within the guide bushing. Due to the frictional guidance of the section of the inclined ejector, i.e. the slide, as well as the section of the push rod facing the first end within the guide bushing, there is no need for further guidance of the inclined ejector within the tool. The guide bushing can be mounted within an abutment of a tool plate.The rack section of the slide interacts with the rack section of the push rod in such a way that the linear movement of the push rod is transmitted transversely to the slide through a positive, mutual meshing of the two rack sections in the manner of a helical gear, and the inclined ejector is thereby displaced from a first position to a second position. A first disadvantage of this solution is that the production of rack sections is technically complex and becomes uneconomical, especially with longer rack sections. A further disadvantage of this solution is that the respective rack sections must be formed over a relatively long section of both the slide and the push rod in order to enable large strokes.

[0008] A further disadvantage of this solution is that, due to the geometry of the respective rack sections, a section with a smaller cross-section and thus less material is followed by a section with a larger cross-section and thus more material, resulting in a body with alternating cross-sections and alternating bending resistances. The positive force input between the two intermeshing rack sections thus occurs via alternating cross-sections with alternating bending resistances, which can lead to local stress increases due to bending. The alternating cross-sections of the rack area have a particularly detrimental effect on the fatigue strength of the carriage due to alternating compressive-tensile stress superimposed on the bending.As a result, the inclined ejector is subject to high loads in its section facing the second end, i.e. the slide, while the section of the push rod facing the first end is also subject to high loads. The load on the slide compared to the push rod is relatively higher due to the additional transverse force component caused by the gear effect between the helical push rod and the helical slide. In addition to the relatively high load on the section of the inclined ejector facing the second end, there is also the load on the section facing the first end, which absorbs the forces of the mold, i.e. the molding plate, via the ejector head. These forces overlap with the molding force and place additional loads on the inclined ejector.A further disadvantage is that the so-called transition point of the positive force application between the two rack sections is located in the area of ​​the slide facing the second end, and thus the forming force (thrust) of the inclined ejector is generated geometrically remote from the undercut area to be formed. Another disadvantage is that the location of the guide bushing within the tool where the inclined ejector is guided is geometrically remote from the location of the introduction of the forming force of the inclined ejector within the ejector device, and the inclined ejector is thus mechanically unguided over a longer section.A lever arm forms between the ejection point directly below the undercut area to be molded and the transition point between the push rod and the slide, whereby the aforementioned alternating bending stress on the slide is superimposed on the aforementioned alternating compressive and tensile stress on the slide. Particularly in the case of such an inclined ejector with a long stroke, this can lead to the inclined ejector becoming mechanically unstable in the section facing the first end. The structural mechanical disadvantages described above can result in the molding forces being limited in such an inclined ejector, which can have a direct impact on the size of the undercut to be demolded and an indirect impact on the size and weight of the injection-molded part to be molded.A further disadvantage is that a pitch error can occur between the two rack sections, for example due to a missing tooth or a damaged tooth flank, which could result in the complete failure of the inclined ejector. Furthermore, the friction-prone rack drive of such an inclined slide must be permanently lubricated, which can lead to contamination from fine abrasion between the racks or from external dust. The resulting friction, along with all of the aforementioned disadvantages, can cause premature wear and failure of the inclined ejector. In the event of damage to the slide or push rod, all elements of the inclined ejector must be replaced because the guide bushing is also subject to increased wear due to its structural mechanical stress and the aforementioned additional friction.

[0009] None of the solutions known from the aforementioned prior art makes it possible to provide a low-wear and low-deformation ejector device that provides high molding forces, particularly for producing large-format and / or heavy injection-molded or die-cast parts with undercuts. The invention is therefore based on the object of further developing a straight or inclined ejector described above for an ejector device of a plastic injection-molded or die-casting tool such that, on the one hand, it has high mechanical stability and robustness for generating high molding forces while simultaneously being simple and subject to low wear. On the other hand, it is constructed from a few replaceable and extendable elements that are as similar as possible in order to eliminate the aforementioned disadvantages of the prior art.

[0010] Disclosure of the invention

[0011] This object is achieved by an inclined ejector for an ejector device for demoulding undercuts within a tool for plastic injection moulding or die casting with the features of claim 1 and the dependent claims.

[0012] Further embodiments are specified in the dependent claims.

[0013] Accordingly, a device, in particular an inclined ejector, for demolding a cast component with an undercut from a cavity plate for a casting process or an injection molding process with an ejector is proposed, comprising: a guide element; an ejector element which is guided in the guide element in a translationally sliding manner in a first direction and has a first end which can be coupled to an ejector head; a pushing element which is guided in the guide element in a translationally sliding manner in a second direction, wherein the first and the second direction enclose a guide angle of not equal to 0°; a coupling mechanism which is designed to transmit translational movements of the ejector element and of the pushing element and in their first and second directions.second direction mechanically coupled; a stabilizing device arranged between the first end of the ejector element and the guide element to reduce a deflection of the ejector element transversely to the first direction of the translational movement of the ejector element or transversely to the second direction of the translational movement of the pushing element.

[0014] A first group of functional elements of a device, i.e. a tool for plastic injection molding or die casting in which the inclined ejector according to the invention is used, are differently designed tool plates that fulfill different functions within the device. The different embodiments of the tool plates can in particular comprise a fixed, non-displaceable mold plate (cavity plate) and a non-fixed, i.e. displaceable, movable mold plate (core plate). A further displaceable tool plate can be represented by an ejector plate. The displaceable tool plates can be displaced by means of various ejection cylinders (hydraulic cylinders) within the device from a first position, a so-called molding position, to a second position, a so-called demolding position.

[0015] A further group of functional elements of the inclined ejector according to the invention for an ejector device for demolding undercuts within the aforementioned device comprises different embodiments of further ejector elements that fulfill different functions within the ejector device. The different embodiments of these further ejector elements can, on the one hand, represent a first thrust element mounted in a guide element and displaceably arranged therein, and, on the other hand, a second ejector element mounted in the same guide element and displaceably arranged therein, which are displaced from a first position to a second position within the device by means of a first ejection cylinder and an ejector plate.

[0016] A third group of functional elements of the inclined ejector according to the invention for an ejector device within the aforementioned device comprises a guide element and passages provided therein, as well as a guide groove provided therein. The passages accommodate a push element or a displaceably arranged ejector element arranged therein. The push element and the ejector element, which is operatively connected to it by means of a coupling mechanism, are displaced from a first position to a second position within the device by means of the aforementioned ejector plate and the aforementioned first ejection cylinder.

[0017] A first advantageous aspect of the solution according to the invention is that a first ejection cylinder arranged in a device for a casting process or injection molding process can generate a stroke which can be transmitted via a first mechanical connection to an ejector plate and further from the ejector plate by means of a second mechanical connection to a pushing element! and further via a further mechanical connection (coupling mechanism) from the pushing element to an ejector element and an ejector head arranged thereon. The surface direction, i.e. the plane of the tool plates arranged displaceably or immovably in the device and thus that of the ejector plate, extends transversely to the displacement direction, i.e. perpendicular or inclined to the direction of movement of the pushing element or the ejector element coupled thereto.By displacing the ejector element, an ejector head arranged on the ejector element can be displaced in an ejection direction. The ejector plate represents a first embodiment of a tool plate arranged so as to be displaceable within the device. The ejection cylinder, generally a hydraulic drive unit, can be arranged in particular within the device between a base plate and the ejector plate, wherein the base plate and an end plate represent further embodiments of tool plates arranged so as to be non-displaceable within the device and close off the device to the outside. The stroke generated by the ejection cylinder causes the pushing element to be displaced from a first to a second position in its longitudinal direction by means of the ejection plate and optionally by means of a pushing element extension, which displacement occurs in a first direction.

[0018] The pushing element is slidably received in a first passage of a guide element, wherein the guiding element represents a type of guiding body or guide bushing which is received within the device in a core plate (movable mold plate), wherein the core plate represents a slidably arranged embodiment of a tool plate within the device. The core plate receives, on the one hand, at least one guiding element in at least one receptacle and, on the other hand, at least one ejector head in at least one recess. Furthermore, the ejector element is received in the guide element in its longitudinal direction by means of a second passage in a second direction. The ejector element is operatively connected to the pushing element by means of a coupling mechanism, wherein the coupling mechanism represents a mechanical connection (coupling) between the pushing element and the ejector element.Due to the coupling between the pusher element and the ejector element by means of the coupling mechanism, a displacement of the pusher element in a first direction, from a first position to a second position, causes a simultaneous displacement of the ejector element in a second direction, from a first position to a second position. The ejector head arranged on the ejector element can thereby be displaced in the second direction of the ejector element, from a first position to a second position, and eject an undercut of a casting from a core plate (movable mold plate).

[0019] A further advantageous aspect of the solution according to the invention is that the coupling mechanism and a stabilizing device formed therein are arranged between the ejector element and the thrust element in geometric proximity to connect the ejector head to a first end of the ejector element facing the ejector head. This allows high thrust forces and thus high ejection forces to be generated in close proximity to the ejector head and thus close to a critical point in the ejection process for ejecting a cast part having at least one undercut from a cavity plate.

[0020] In addition, the stabilization device ensures that, on the one hand, the ejector device can always return to the same, traceable position after the ejection process and, on the other hand, the ejector head can always carry out the ejection process at the same, traceable position within the device.

[0021] A further advantage of the solution according to the invention is that, in the inclined ejector according to the invention, the mechanical properties of rigid, maintenance-free ejector and thrust elements can be advantageously combined with the properties of a maintenance-free and mechanically highly resilient guide element, wherein the guide element can be designed, in particular, in the manner of a guide bush. In this context, "rigid" means that the ejector element and the thrust element can be designed, in particular, as solid, particularly flattened round bars, which have high moments of resistance to bending, torsion, and transverse forces. The ejector element and the thrust element have low elasticity and, in particular, do not have any resilient properties in their respective longitudinal directions (first and second directions).As a result, the inclined ejector according to the invention has high fatigue strength properties, in contrast to inclined ejector solutions that are only designed to be operationally stable and which contain springs or elastically designed link rods or ejector components with lower mechanical strengths.

[0022] A further advantage of the solution according to the invention lies in the adaptability of the inclined ejector by lengthening or shortening the thrust element, in order to adapt the inclined ejector to the geometry of a device for a casting or injection molding process, in particular to the number, dimensions, weights, and respective spacing of the mold plates used therein. For this purpose, the thrust element can advantageously be extended by adding a thrust element extension to its end facing the second end. Such a thrust element extension can be implemented by means of an extension that can be inserted or screwed into the second end of the thrust element.

[0023] According to a further advantage of the inventive solution, the operative connection between the ejector element and the pusher element is established by means of a coupling mechanism. The coupling mechanism consists, on the one hand, of two recesses, each located in a section between the first end of both the ejector element and the pusher element and the guide element, and which represent a guide for an elongated driver of the coupling mechanism. The recesses can have a wedge-shaped or rectangular cross-section. The respective first ends of the recess, of the ejector element, and of the pusher element face the ejector head, while the second ends of the recess, of the ejector element, and of the pusher element face away from the ejector head.

[0024] Here, the coupling mechanism, on the other hand, consists of the driver located in the recesses, which extends between the ejector element and the pushing element and can be releasably attached to the pushing element. The driver is attached within the recess located in the pushing element, preferably by means of a fastening means in the form of a screw connection, wherein the driver is guided displaceably along its longitudinal direction in at least one of the recesses in the pushing element or in the ejector element. Other conceivable fastening means for attaching the driver to the pushing element can be a rivet connection or a pin located in bores, wherein the bores are located in the region of the recess in the pushing element and in the driver. According to a further advantage, the inclined ejector according to the invention is provided with a stabilizing device within the coupling mechanism.The stabilizing device is formed by the accommodation of the driver in the recesses of the ejector element and the pusher element. The stabilizing device, as a component of the coupling mechanism, is thus arranged in the recess between the first end of the ejector element and the pusher element and the guide element in order to stabilize them against flexurally elastic deformation, i.e., to reduce or prevent deflection of the ejector element transverse to the first direction of its translational movement, in other words, the ejection direction.The stabilizing effect generated in this way aims at improved operational reliability of the inclined ejector in such a way that transverse forces acting on the inclined ejector, which in particular cause a deflection of the ejector element transversely to the first direction of the translational movement of both the ejector element and the pushing element, can be effectively reduced, up to and including preventing an undesired mutual shearing out of the first region of the ejector element facing the ejector head relative to the first region of the pushing element facing the ejector head.

[0025] According to a further advantage, a drive action from the pushing element to the ejector element can be generated by means of the coupling mechanism extending between the pushing element and the ejector element. The resulting drive action is determined, on the one hand, by the guide angle, which is established between the ejector element and the pushing element by means of the orientation of passages in a core plate in which the ejector element and the pushing element are guided, and, on the other hand, by the setting angle, which represents the orientation of the recess in the ejector element for receiving the driver with respect to the longitudinal extension of the ejector element or the orientation of the recess in the pushing element for receiving the driver with respect to the longitudinal extension of the pushing element.The geometric relationship established between the thrust element and the ejector element thus has a direct influence on the magnitude of the thrust effect that the coupling mechanism can generate between the ejector element and the thrust element, together with the stroke of an ejector plate. The achievable thrust effect of the coupling mechanism and the driver contained therein corresponds mechanically to the effect of a cam within a thrust gear. By selecting the angle of attack of the coupling mechanism, a different gear effect can be generated between the thrust element and the ejector element due to the cam-like effect equivalent of the driver. The gear effect in the mechanical sense corresponds either to a transmission with an acceleration effect or to a reduction with a deceleration effect.The greater the angle of attack of the coupling mechanism and the greater the stroke of the pushing element, the greater the gear effect from the pushing element to the ejector element. A smaller angle of attack of the coupling mechanism and a smaller stroke of the pushing element, on the other hand, result in a smaller gear effect on the ejector element. Thus, by adjusting the orientation and angle of attack of the driver of the coupling mechanism between the pushing element and the ejector element, the ejection process of an undercut can be accelerated or decelerated using the inclined ejector according to the invention. The angle of attack of the driver of the coupling mechanism on the ejector element corresponds to an angle of 0° when the driver points in the direction away from the ejector head.Similarly, the angle of attack of the driver of the coupling mechanism on the push element corresponds to an angle of 0° when the driver points in a direction away from the ejector head. An angle of attack of the driver on the push element at an angle greater than 90° relative to the longitudinal axis of the push element causes acceleration. An angle of attack less than 90° relative to the longitudinal axis of the push element causes deceleration.

[0026] According to a preferred embodiment, the inclined ejector according to the invention has a guide element in the form of a preferably rotationally symmetrical, in particular cylindrical, body. A guide element designed in this way can be accommodated in a receptacle within a core plate of a device for a casting or injection molding process. The core plate represents an embodiment of a tool plate having recesses within which ejector heads arranged on the ejector element can be accommodated.

[0027] The guide element can be fixed to the core plate by means of a fixing element, which, on the one hand, is received in a recess in a first section of the guide element located at the end of the guide element facing the ejector head, and, on the other hand, fixes the guide element to the core plate, preferably by means of a screw connection. The guide element can have passages for receiving the ejector element and the pusher element, by means of which the ejector element and the pusher element are guided in the guide element in a first and second direction, respectively. The directions of the passages within the guide element are at a guide angle to one another.In a first embodiment of the guide element, this guide angle can be particularly "acute," i.e., between 10° and 20°, and forms between the respective longitudinal axes of the ejector element and the pusher element. In a further embodiment of the guide element, this guide angle can be between 10° and 45°. A preferred embodiment of the guide element can, in addition to the passages located therein for receiving the pusher element or the ejector element, have a guide groove in which the driver of the coupling mechanism can be received when the pusher element is moved back from the ejection process.In a preferred embodiment of the inclined ejector, the driver can be moved into different positions within the guide groove of the guide element by means of the pushing element, wherein a first position can represent a mechanical stop in the section of the guide element which is located at the end of the guide element facing away from the ejector head and a second position can represent the opening of the guide groove in the section of the guide element which is located at the end of the guide element facing the ejector head. A further position can lie outside the guide groove and thus outside the guide element. A first advantage of the preferred embodiment is that it can be used to generate a maximum stroke of the inclined ejector by allowing the driver to fully engage in the guide element within the guide groove.A further advantage of the preferred embodiment is that, by immersing the driver in the guide groove, it receives a further mechanical fixation within the guide element in addition to the stabilization device provided by the coupling mechanism, which additionally contributes to the robustness and fatigue strength of the inclined ejector, particularly with a short ejection stroke of the ejector device and with maximum ejection force.

[0028] According to a further embodiment, the guide element can be designed with passages but without a guide groove. Such an embodiment can be used in ejector devices where the requirement for a maximum ejection stroke is not met, for example, in short-stroke ejector devices.

[0029] A further advantage of the inventive solution lies in the possibility of modularly combining elements of similar design and / or dimensions to provide various embodiments of the inclined ejector according to the invention, in particular different devices for a casting process or injection molding process, with cavity plates of different dimensions, weights, and core plates with ejection geometries and / or different numbers of mold plates. For example, in such a variably designed ejector device, a similarly designed guide element can be combined with a similarly designed ejector element and a complementary push element.The similarity of the guide element is characterized in particular by its dimensions, the arrangement of the passages within the guide element, the choice of the guide angle between the passages, as well as the cross-section and diameter of the passages within which the ejector element and the pusher element are mounted independently of each other. For example, different embodiments of the guide element can enable different designs and effects of inclined ejectors by additionally combining a pusher element and an ejector element using a coupling mechanism in such a way that either an accelerating or a decelerating effect on the cast part to be ejected can be generated in different areas of the ejector device.By means of the numerous possible combinations of the elements of the inclined ejector, a modular system can be created, by means of which inclined ejectors of different dimensions and designs can be provided for the production of a wide variety of ejector devices.

[0030] Short description of the characters

[0031] Details of the invention are explained in more detail using an exemplary embodiment illustrated in the accompanying figures. Identical multiple references to a component in one and the same figurative representation include both the singular and plural of the respective element depicted. Therein:

[0032] Figure 1a is a side view of a device for a casting process or an injection molding process with a representation of several embodiments of the inclined ejector as well as a casting with several undercuts still in engagement with the ejector device, illustrating the situation before the molding process (molding position);

[0033] Figure 1b shows a side view of a device for a casting process or an injection molding process, showing several embodiments of the inclined ejector and a cast part with several molded sections, illustrating the situation immediately after the undercuts have been ejected (molding position); Figures 2a and 2b show side views of a first embodiment of the inclined ejector with an ejector head attached to the first end of the ejector element in the starting position (molding position);

[0034] Figures 3a, 3b are perspective views of another embodiment of the

[0035] Inclined ejector in an intermediate position (during the ejection process);

[0036] Figures 4a, 4b are perspective views of a first embodiment of the

[0037] Inclined ejector in final position (forming position), without ejector head attached to the first end of the ejector element;

[0038] Figures 5a, 5b, 5c show side views of a further embodiment of the inclined ejector with a positive orientation of the coupling mechanism between the pusher element and the ejector element (translation);

[0039] Figures 6a, 6b, 6cSide views of a first embodiment of the inclined ejector with a negative orientation of the coupling mechanism between the pusher element and the ejector element (reduction);

[0040] Figures 7a, 7b, 7c show a perspective view, a side view and a cross-section of the guide element;

[0041] Figures 8a, 8b, 8c Side views and a perspective view of a

[0042] Design of the ejector element;

[0043] Figures 9a, 9b, 9cSide views and a perspective view of an embodiment of the thrust element;

[0044] Figures 10a, 10b, 10c, 10d, 10e show side views and a perspective view of various embodiments of the driver;

[0045] Figures 11a, 11b, 11c show side views of a further embodiment of the inclined ejector, a further embodiment of the ejector element, a further embodiment of the driver and a further embodiment of the recesses within the pushing element and the ejector element.

[0046] Description of embodiments Figure 1a shows various embodiments 11, 12, 13 of inclined ejectors located between two tool plates 95, 96 and between a core plate 92 and a cavity plate 93 of a device for a casting process or injection molding process 9 in a first position (molding position), the situation with the cavity plate 93 closed, immediately before the molding process of the cast part 14 with the molding areas 141, 142, 143 and the undercuts 1411, 1421, 1431. The ejector elements 31, 32, 33 and respective drivers 62 are located in a first position (molding position). In this first position, the ejector heads 41, 42, 43 are still positively connected to the undercuts 1411, 1421, 1431 of the cast part 14.

[0047] The pusher elements 51, 52, 53 are each extended by means of a pusher element extension 71, 72. The pusher element extensions 71, 72 located within the ejector device or the pusher elements 51, 52, 53 are detachably fastened to the ejector plate 91 by means of a fastening means 8; the fastening means 8 can in particular represent a screw connection. The ejector plate 91 is in a first position (molding position). The guide elements 21, 22, 23 located within the ejector device are fastened to the core plate 92 by means of receptacles 24 and fixing elements 27 (not shown). Before the ejection process, the ejector heads 41, 42, 43 of the inclined ejectors 11, 12, 13 are located in this first position within recesses 91, 92, 93 (not explicitly shown) which are arranged in the forming area of ​​the core plate 92.

[0048] Figure 1b shows embodiments 11, 12, 13 of inclined ejectors located between two tool plates 95, 96 of a device for a casting process or injection molding process 9 in a second position (molding position) within the free space 98 with the core plate 92 open, immediately after the ejection process and before the molding of the cast part 14 with the molding areas 141, 142, 143 and the undercuts 1411, 1421, 1431. The ejector plate 91 is moved into a second position (molding position), wherein the ejection cylinder (not shown) of the ejector device generates an ejection stroke 97 of the ejector plate 91.

[0049] Embodiment 11 of the inclined ejector has a driver 62 that assumes a neutral position characterized by an angle of incidence β, in particular of 90°, between the longitudinal axis of the driver 62 and the longitudinal axis of the pushing element 51. The displacement of the pushing element 51 from a first to a second position causes a displacement of the ejector element 31, during which no speed difference and thus no acceleration occurs during the ejection process between the pushing element 51 and the ejector element 31. The pushing element 51 is extended by a pushing element extension 71 in such a way that the forming area 141 with the undercut 1411, which is raised compared to the forming areas 142, 143, can be ejected.

[0050] Embodiment 12 of the oblique ejector has a driver 62 that assumes an acceleration position characterized by an angle of attack β of greater than 90° between the longitudinal axis of the driver 62 and the longitudinal axis of the pushing element 51, or by an angle between +100° and +135° compared to the previously described neutral position of 90°, so that the driver 62 points obliquely in the first direction towards the ejector head and forms an acute angle between the first end of the pushing element and the protruding end of the driver 62. The displacement of the pushing element 52 from a first to a second position causes an acceleration of the ejector element 32, so that a positive change in speed is generated between the pushing element 52 and the ejector element 32 during the ejection process.The pushing element 52 is extended by a pushing element extension 72 in such a way that the forming area 142, which is angled relative to the forming areas 141, 143, can be ejected with the undercut 1421.

[0051] Embodiment 13 of the inclined ejector 1 has a driver 62 that assumes a deceleration position characterized by a (negative) angle of attack β of less than 90° between the longitudinal axis of the driver 62 and the longitudinal axis of the pushing element 51, or by an angle between 80° and 45° compared to the previously described neutral position of 90°. The displacement of the pushing element 53 of embodiment 13 from a first to a second position causes a deceleration of the ejector element 33, so that a negative speed change is generated between the pushing element 53 and the ejector element 33 during the ejection process. The pushing element 53 is extended by a pushing element extension 72 in such a way that the forming region 143, which is angled relative to the forming regions 141, 142 and has the undercut 1431, can be ejected.

[0052] The size of the free space 98 forming between the core plate 92 and the cavity plate 93 depends on the ejection stroke 97 of the ejector plate 91. The ejector plate 91 is displaced from a first to a second position (molding position) by means of a hydraulic ejection cylinder of the ejector device (not shown) under an ejection stroke 97. In this step of the ejection process, the ejector heads 41, 42, 43 are no longer positively connected to the undercuts 1411, 1421, 1431 but are connected, in particular adhesively, to the casting 14. During the ejection process, the ejector heads 41, 42, 43 move into a second position (molding position) by moving out of the recesses 921, 922, 923 arranged in the core plate 92.The respective pushing elements 51, 52, 53 move from the first position (molding position) by means of the ejection stroke 97 into a second position (forming position), wherein the respective pushing elements 51, 52, 53 are slidably mounted within the guide elements 21, 22, 23 in respective passages (not shown). The ejection stroke 97 that can be generated by the inclined ejector 1 is largely determined by the length of the pushing elements 51, 52, 53 or the pushing element extensions 71, 72 as well as by the displacement of the ejector plate 91. Due to the rigid design of the pushing elements 51, 52, 53 and the ejector elements 31, 32, 33, they can be displaced unguided and without mechanical bearings outside the guide elements 21, 22, 23 within the resulting free space 98 into a second position (forming position). The ejector heads 41, 42, 43 arranged on the ejector elements 31, 32, 33 remain in the second position (forming position) within the free space 98.The ejector heads 41, 42, 43 can be provided with notches 411, 421, 431, which are detached from the undercuts 1411, 1421, 1431 of the cast part 14. The cast part 14 rests on the ejector heads 41, 42, 43. In a subsequent process step, the cavity plate 93 can either adhesively entrain the cast part 14 (not shown), or the cast part 14 can be removed from the device for a casting process or injection molding process 9 (not shown).

[0053] Figures 2a, 2b show embodiment 13 of an inclined ejector in a first position (molding position). The driver 62 is located within the section of the guide element 23 facing away from the ejector head 43, on a mechanical stop of a guide groove 25 (not shown) facing away from the ejector head 43. In the section of the guide element 23 facing the ejector head 43, there is a receptacle 24 for receiving a fixing element 27 (not shown). By means of the fixing element 27 (not shown), the guide element 23 can be detachably connected to a core plate 92 (not shown). A guide angle α is formed between the longitudinal axis of the pushing element 53 and the longitudinal axis of the ejector element 33.An angle of attack ß forms between the longitudinal axis of the pushing element 53 and the longitudinal axis of the driver 62, and an angle of attack y forms between the longitudinal axis of the ejector element 33 and the longitudinal axis of the driver 62. The shape of the ejector head 43 and the notch 431 is designed to slope downwards; as a result, a forming region 143 (not shown) and an undercut 1431 (not shown) present therein can be received by the present embodiment 13 of the inclined ejector during the forming process (not shown) and ejected during the subsequent forming process (not shown). In this context, "sloping" means that the forming angle that occurs during forming corresponds to the angle of an undercut 1431 (not shown).

[0054] Figures 3a and 3b show embodiment 12 of an inclined ejector in a second position (after the molding process), at the start of the ejection process. The driver 62 is located within the section of the guide groove 25 of the guide element 22 facing the ejector head 42 (not shown). The longitudinal axis of the pusher element 52 forms a guide angle α with respect to the longitudinal axis of the ejector element 32. The guide angle α is determined by the angle of the longitudinal axes of the passages 28, 29 to one another within the guide element 22. The longitudinal axis of the driver 62 forms a (positive) angle of attack β of greater than 90° with respect to the longitudinal axis of the pusher element 52 and an angle of attack γ of greater than 90° with respect to the longitudinal axis of the ejector element 32.The thrust element 52 and the ejector element 32 are preferably designed as flattened round bars and are guided in complementary passages 28, 29 within the guide element 22. The guide element 22 can have a flattened portion 261 on at least one side of its circular-cylindrical surface, which extends in the direction of the longitudinal axis of the guide element 22, by means of which flattened portion 261 the guide element 22 can be held in a complementary receptacle within the previously described core plate 92 (not shown) in a rotationally secure manner. As a result, torsional forces acting on the inclined ejector 12 during operation of a device for a casting or injection molding process 9 can be absorbed by the generally solid core plate 92 (not shown), which improves the stability and fatigue strength of the ejector device and thus of the device for a casting or injection molding process 9.A receptacle 24 which is arranged in the first section of the guide element 22 receives a fixing element 27 (not shown) by means of which the guide element 22 can be releasably fastened to the core plate 92 (not shown).

[0055] Figures 4a and 4b show embodiment 13 of an inclined ejector in a third position (forming position) at the end of the ejection process, in which a negative gear effect (deceleration) can be exerted by the pusher element 52 on the ejector element 32 by means of the "negative" orientation of the driver 62. The ejection stroke 97 (not shown) of the ejection cylinder (not shown) and thus of the ejector plate 91 has reached a maximum value. The pusher element 53 and the ejector element 33 are operatively connected to one another by means of the driver 62 of the coupling mechanism 6 and the stabilizing device 61 contained therein (see indicated circle). The driver 62 is received and guided partly within a recess 63 in the pushing element 53 and partly within a recess 64 in the ejector element 33 and is located in a third position (forming position), which corresponds to a final position at the end of the ejection process.The longitudinal axis of the pushing element 53 forms a guide angle α with respect to the longitudinal axis of the ejector element 33. The longitudinal axis of the driver 62 forms a (negative) angle of attack β of less than 90° with respect to the longitudinal axis of the pushing element 53 and an angle of attack γ of less than 90° with respect to the longitudinal axis of the ejector element 33. A receptacle 24 (not shown), which is arranged in the section of the guide element 22 facing the ejector head 43 (not shown), receives a fixing element 27, by means of which the guide element 23 can be releasably fastened to the core plate 92 (not shown).

[0056] Figures 5a, 5b, and 5c show embodiment 12 of an inclined ejector in a third position (forming position), in which a positive gear effect (acceleration) can be exerted from the pushing element 52 to the ejector element 32 by means of the "positive" orientation of the driver 62. The longitudinal axis of the pushing element 52 forms a guide angle α with respect to the longitudinal axis of the ejector element 32. The longitudinal axis of the driver 62 forms an angle of attack β with respect to the longitudinal axis of the pushing element 52 and an angle of attack γ with respect to the longitudinal axis of the ejector element 33. The pushing element 52 and the ejector element 32 are operatively connected to one another by means of the driver 62 of the coupling mechanism 6 and the stabilizing device 61 contained therein (see indicated circle). As described above, a “positive” position of the driver 62 at an angle of attack ß of greater than 90° relative to the longitudinal axis of the thrust element 52 orat an angle of attack y of greater than 90° relative to the longitudinal axis of the ejector element 32, a transmission in the mechanical sense due to the mechanical coupling between the pushing element 52 and the ejector element 32, wherein the driver 62 represents a cam in the mechanical sense. The transmission generates an acceleration of the ejector element 32 during the displacement of the pushing element 52 into a second position (forming position). Depending on the orientation of the driver 62, the relationship between the position of the driver 62 at the angle of attack ß relative to the pushing element 52 and the position of the driver 62 at the angle of attack y relative to the ejector element 32 and depending on the ejection stroke 97 of the ejection cylinder (not shown) and the ejector plate 91, a greater or lesser “positive” gear effect, i.e. a greater or lesser transmission ratio ora greater or lesser acceleration of the ejection process can be generated by means of the illustrated embodiment 12. The ejection stroke 97 can reach a maximum value in the third position (forming position). The driver 62 is received and guided partly within a recess 63 in the pushing element 52 and partly in a recess 64 in the ejector element 32 and is located in a third position (forming position), which corresponds to an end position at the end of the ejection process. A receptacle 24 (not shown), which is arranged in the section of the guide element 22 facing the first end, receives a fixing element 27, by means of which the guide element 22 can be releasably fastened to the core plate 92. A receptacle 66 for the fastening means 65 (not shown) of the driver 62 is arranged within the receptacle 63 of the pushing element 52.

[0057] Figures 6a, 6b, 6c show embodiment 13 of an inclined ejector in a third position (forming position), in which a “negative” gear effect (deceleration) can be exerted by the pushing element 53 on the ejector element 33 by means of the “negative” orientation of the driver 62. The longitudinal axis of the driver 62 forms an angle of attack β with respect to the longitudinal axis of the pushing element 53 and an angle of attack γ with respect to the longitudinal axis of the ejector element 33. The pushing element 53 and the ejector element 33 are operatively connected to one another by means of the driver 62 of the coupling mechanism 6 and the stabilizing device 61 contained therein (see indicated circle). As described above, a “negative” position of the driver 62 at an angle of attack β of less than 90° with respect to the longitudinal axis of the pushing element 53 orat an angle of attack γ of less than 90° relative to the longitudinal axis of the ejector element 33, a reduction in the mechanical sense due to the mechanical coupling between the pushing element 53 and the ejector element 33, wherein the driver 62 represents a cam in the mechanical sense. The reduction generates a deceleration of the ejector element 33 during the displacement of the pushing element 53 into a third position (forming position). Depending on the orientation of the driver 62, the relationship between the position of the driver 62 at the angle of attack β relative to the pushing element 53 and the position of the driver 62 at the angle of attack γ relative to the ejector element 33, and depending on the ejection stroke 97 of the ejector plate 91, a greater or lesser negative gear effect, i.e. a greater or lesser reduction or a greater or lesser deceleration of the ejection process, can be generated by means of the illustrated embodiment 13.The ejection stroke 97 has reached a maximum value that can be generated by the ejector device, i.e., the ejection cylinder (not shown), the ejector plate 91 (not shown), the pusher element extension 72 (not shown), and the pusher element 53. The driver 62 is received and guided partly within a recess 63 in the pusher element 53 and partly in a recess 64 in the ejector element 33 and is located in a third position (forming position), which corresponds to a final position at the end of the ejection process. The longitudinal axis of the pusher element 53 forms a guide angle α with respect to the longitudinal axis of the ejector element 33. A receptacle 24, which is arranged in the section of the guide element 22 facing the first end, receives a fixing element 27 (not shown), by means of which the guide element 23 can be releasably fastened to the core plate 92.A receptacle 66 for a fastening means 65 (not shown) of the driver 62 is arranged within the receptacle 63 of the pushing element 53.

[0058] Figures 7a, 7b, 7c show the guide element 2 in the embodiment of a rotationally symmetrical, cylindrical body, in the manner of a bushing. The guide element 2 can preferably have a flattened portion 261 extending in the longitudinal direction on its outer surface 26. The guide element 2 can preferably be made of a metallic alloy, in particular of brass. Other conceivable materials for the production of the guide element 2 can be ceramics or metal sinter or 3D laser sintering powder. In the guide element 2 there are passages 28, 29, which can preferably be produced by milling or erosion. The passages 28, 29 are arranged spaced from one another in their longitudinal direction at a guide angle α within the guide element 2. The passages 28, 29 are located off-center within the body of the guide element 2 and can be extensions orrepresent flattened areas of circular cross-sections which geometrically correspond to the cross-sections or the outer contours of the pushing element 5 or the ejector element 3. As a result, both the pushing element 5 (not shown) and the ejector element 3 (not shown) can be displaced in the manner of a fit by means of the feedthroughs 28, 29 within the guide element 2, in particular without the need for lubricant. The cross-sections of the feedthroughs 28, 29 partially overlap, and these are preferably arranged relative to one another within the guide element 2 in such a way that the pushing element 5 and the ejector element 3 can be guided towards one another without contact. This ensures that, on the one hand, no positive or frictional connection occurs between the pushing element 5 and the ejector element 3 within the guide element 2, which prevents the formation of friction and abrasion between the pushing element 5 and the ejector element 3.As a result, both the guide element 2 and the bushings 28, 29, the thrust element 5, and the guide element 3 can be designed and operated wear-free and, in particular, lubricant-free, which contributes to the maintenance-free nature of the ejector device. A guide groove 25 is recessed into the guide element 2, extending from the longitudinal center of the body of the guide element 2 to the outer surface 26 of the guide element 2 and can preferably be produced by milling or eroding. The guide groove 25 serves to accommodate the driver 62 of the coupling mechanism 6 (not shown), which can be displaced within the guide groove 25 without friction and thus without wear, wherein the driver 62 can be fully immersed in the body of the guide element 2.The guide groove 25 has a mechanical stop 251 in the section of the guide element 2 facing the second end, which represents a limit to the displacement of the driver 62. The guide groove 25 is open in the section of the guide element 2 facing the ejector head 4 (not shown) so that the driver 62 can be displaced during operation of the inclined ejector, in particular in the direction of the end of the guide element 2 facing the ejector head 4 (not shown). This enables the respective embodiment 11, 12, 13 of the inclined ejector to generate a maximum stroke between a first (molding position), a second position (at the end of the molding process), and a third position (molding position). A first position (molding position) of the driver 62 and the coupling mechanism 61 is therefore not necessarily limited to the space above the guide element 2.In the end of the guide element 2 facing the ejector head 4 (not shown), a recess 24 is provided for receiving a fixing element 27 (not shown), by means of which the guide element 2 can be releasably fastened to the core plate 92 (not shown). Each guide element 2 can be accommodated in a receptacle (not shown) in the core plate 92 (not shown) in such a way that the respective guide element 2 can be easily replaced. This enables a high degree of operational readiness of the ejector device.

[0059] Figures 8a, 8b, 8c show a preferred embodiment of the ejector element 3. The ejector element 3 has the shape of a round rod, which can have a flattened portion 34 on one side. By means of the flattened portion 34, the ejector element 3 can be mounted in a rotationally secure manner within the passage 29 (not shown) of a guide element 2 (not shown), wherein the passage 29 within the guide element 2, as described above, has a cross-section complementary to that of the ejector element 3. The end of a recess 64 facing the ejector head 4 (not shown) and the end facing away from the ejector head 4 (not shown) are arranged parallel to one another on the one hand and at an angle y relative to the longitudinal axis of the ejector element 3 on the other. A recess 64 arranged in the ejector element 3 can accommodate a driver 62 (not shown).The end of the recess 64 facing the ejector head 4 (not shown) and the end facing away from the ejector head 4 (not shown) represent a first component of a stabilizing device 61 and can, in a first embodiment of the ejector element 3, be designed in particular in the manner of, for example, a wedge-shaped undercut 631. The wedge-shaped undercut 631 present in the recess 64, for example, serves to accommodate a second component of a stabilizing device 61, which can, in particular, be designed in the manner of a wedge-shaped guide strip 621 (not shown) of a driver 62 (not shown). The end of the recess 64 facing the ejector head 4 (not shown) and the end facing away from the ejector head 4 (not shown) can, in a further embodiment of the ejector element 3, be designed as a rectangular undercut 632 (not shown).A rectangular undercut 632 (not shown) of the recess 64 serves to accommodate a rectangular guide bar 622 (not shown) of a driver 62 (not shown). By means of a first embodiment of the first and second components of the stabilizing device 61, that is to say by means of the wedge-shaped undercut 631 of the recess 64 and a complementary wedge-shaped guide bar 621 of the driver 62 (not shown), a deflection of the ejector element 3 in a second direction transverse to a different first direction of the translational movement of the ejector element 3 can be reduced, up to and including preventing such a deflection, whereby a stabilization of the inclined ejector can take place by means of a stabilizing device 61 designed in this way during the ejection process, which contributes to the fatigue strength of the ejector device.By means of a further embodiment of the stabilizing device 61, represented by a rectangular shape of an undercut 632 (not shown) within the end of the recess 64 facing the ejector head 4 (not shown) and the end facing away from the ejector head 4 (not shown), as well as a complementary rectangular shape of a guide bar 622 of the driver 62 (not shown), the inclined ejector can be stabilized during the ejection process by means of a stabilizing device 61 designed in this way. Figures 9a, 9b, 9c show a preferred embodiment of the pushing element 5. The pushing element 5 has the shape of a round rod which has a flattened area 54 on two of its sides.By means of the flattened portions 54, the pushing element 5 can be mounted in a rotationally secure manner within the passage 28 (not shown) of a guide element 3 (not shown), wherein the passage 28 within the guide element 3 has a cross-section complementary thereto. A recess 63 arranged in the section of the pushing element 3 facing the ejector head 4 (not shown) can accommodate a driver 62 (not shown). The end of the recess 63 facing the ejector head 4 (not shown) or the end facing away from the ejector head 4 (not shown) represent a further component of the above-described stabilizing device 61 and, in a first embodiment, can be designed in particular in the manner of a wedge-shaped undercut 631. The end of the ejector head.

[0060] 4 (not shown) or the end of the recess 63 facing away from the ejector head 4 (not shown) can be formed in a further embodiment of the stabilizing device 61 at right angles to the flattening 54 and without the previously described wedge-shaped undercut. By means of both embodiments of the stabilizing device 61, a deflection of the thrust element 5 in a second direction transverse to a first direction of the translational movement of the thrust element

[0061] 5 can be reduced, up to and including preventing such a deflection, whereby a stabilization of the inclined ejector can be created during the ejection process, which contributes to the fatigue strength of the ejector device. The end of the recess 63 facing the ejector head 4 (not shown) and the end facing away from the ejector head 4 (not shown) are, on the one hand, parallel to one another and, on the other hand, arranged at an angle of attack ß relative to the longitudinal axis of the pushing element 5. A driver 62 can be arranged in the recess 63 in such a way that its orientation or its longitudinal axis assumes either an angle of attack ß of less than 90° or an angle of attack ß of greater than 90° relative to the longitudinal axis of the pushing element 5.As a result, depending on the orientation of the coupling mechanism 6, with the same pushing element 5 and the same driver 62, either the previously described step-up (acceleration) or the previously described step-down (deceleration) can be generated on an ejector element 3 with a complementary design and orientation of the recess 64, which contributes to the modular variability of the inclined ejector concept. The pushing element 5 has, in the area of ​​the recess 63, a receptacle 66 for a fastening means 65 (not shown), by means of which the driver 62 can be releasably fastened to the pushing element 5. The fastening means 65 can be designed as a screw or as a pin, for which purpose the receptacle 66 can be designed as a screw thread or as a bore. The pushing element 5 has, at its end facing away from the ejector head 4 (not shown), an insertion end 55 ora screw thread 55 for receiving a fastening means (not shown), by means of which a thrust element extension 7 (not shown) can be placed or screwed onto the thrust element 5.

[0062] Figures 10a, 10b, 10c, 10d, 10e show different embodiments of the driver 62. In a preferred embodiment, a driver 62 according to Figures 10a, 10b can be used within a coupling mechanism 6 (not shown) of the inclined ejector according to the invention. The above-described stabilizing device 61 (not shown) as an integral component of the above-described coupling mechanism 6 (not shown) has, on the one hand, the driver 62, the first or second end of which can be designed as a wedge-shaped guide strip 621, and, on the other hand, a complementary undercut 631 (not shown) within a recess 63 or recess 64 (not shown) for receiving a driver 62 designed in this way within an ejector element 3 or a thrust element 5 (not shown).In a further embodiment, the embodiment of a driver 62 according to Figures 10c, 10d can be implemented within a stabilizing device 61 of the inclined ejector according to the invention. In this further embodiment, the previously described stabilizing device 61 can, on the one hand, have a driver 62, the first or second end of which can be designed as a rectangular guide bar 622, and, on the other hand, a rectangular undercut 632 complementary thereto within a recess 63 or recess 64 of an ejector element 3 or a thrust element 5 (not shown). In a further embodiment, an embodiment of a driver 62 according to Figure 10e can be used within the coupling mechanism 6 of the inclined ejector according to the invention, wherein the coupling mechanism 6 in such an embodiment of the inclined ejector can be designed without a stabilizing device 61.This further embodiment can be used in particular in inclined ejectors, which are used in ejector devices within small-scale devices for a casting or injection molding process and in which little or no transverse forces occur between the ejector element 3 and the pushing element 5 during the ejection process. Such ejector devices do not require a stabilizing device 61 within the coupling mechanism 6. The first or second end of a driver 62 designed in this way can be designed without a guide strip and can be received within a recess 63 or recess 64 in an ejector element 3 or in a pushing element 5.A recess 67 for receiving the fastening element 65 (not shown) for fastening the driver 62 to the thrust element 5 (not shown) can be designed in the manner of a circular cylindrical bore, wherein the circular cylindrical bore can have a passage 671 and a support 672 for receiving the previously described fastening means 65.

[0063] Figures 11a, 11b, and 11c show a further embodiment 13 of the inclined ejector. A pusher element 5 and an ejector element 3 are guided in a guide element 2, each by means of passages 28, 29, and are operatively connected to one another by means of a coupling mechanism 6 and a driver 62, as described above. The driver 62 is received in a recess 63 within the pusher element 5 and in a recess 64 within the ejector element 3, as described above. The illustrated embodiment comprises, on the one hand, a driver 62, the first end of which, according to Figures 10c, 10d, is designed without a guide strip and the second end as a rectangular guide strip 622, as well as a rectangular undercut 632 at the second end of the recess 64 for receiving the driver 62.The first and second ends of the recess 64 can be arranged parallel to one another on the one hand and at an angle of incidence y relative to the longitudinal axis of the ejector element 3 on the other. A driver 62 can be accommodated in the recess 64 of the ejector element 3 and the recess 63 of the pushing element 5 in such a way that its orientation and longitudinal axis describe either an angle of incidence y of less than 90° relative to the longitudinal axis of the ejector element 3 or an angle of incidence y of greater than 90°. As a result, by means of a different orientation of the same driver 62, either the previously described step-up effect (acceleration) or the previously described step-down effect (deceleration) can be generated between the pushing element 5 and the ejector element 3, which contributes to the modular variability of the.

[0064] Inclined ejector concept.

[0065] List of reference symbols

[0066] 1 inclined ejector

[0067] 11,12,13 Designs of the inclined ejector 1

[0068] 14 Casting

[0069] 141 ,142,143 Forming areas of the casting 14

[0070] 1411,1421,1431 Undercuts within the forming areas 141 ,142,143 of the

[0071] Casting 14

[0072] 2 guide element

[0073] 21,22,23 Embodiments of the guide element 2

[0074] 24 Holder for fixing element 27 on guide element 2

[0075] 25 Guide groove for receiving the driver 62 in the guide element 2

[0076] 251 Stop at the second end of the guide groove 25

[0077] 26 Shell surface of the guide element 2

[0078] 261 Flattening of the lateral surface 26 of the guide element 2

[0079] 27 Fixing element for fastening the guide element 2 to a cavity plate 92

[0080] 28 Passage for receiving a sliding element 5 in the guide element 2

[0081] 29 Passage for receiving an ejector element 3 in the guide element 2

[0082] 3 Ejector element

[0083] 31,32,33 Embodiments of the ejector element 3

[0084] 34 Flattening on the ejector element 3 4 Ejector head

[0085] 41 ,42,43 Designs of the ejector head 4

[0086] 431 Notch of the ejector head 43

[0087] 5 Thrust element

[0088] 51 ,52,53 Designs of the thrust element 5

[0089] 54 Flattening on the thrust element 5

[0090] 55 Insert end / screw thread for fastening devices for fastening the

[0091] Shear element extension 7

[0092] 6 Coupling mechanism

[0093] 61 Stabilization device

[0094] 62 drivers (cams)

[0095] 621 wedge-shaped guide bar as an embodiment of the section of the driver 62 facing the first end or the second end

[0096] 622 rectangular guide rail as an embodiment of the section of the driver 62 facing the first end or the second end

[0097] 631 Undercut for receiving the driver 62 with wedge-shaped guide rail

[0098] (wedge shape)

[0099] 632 Undercut for receiving the driver 62 with rectangular guide rail

[0100] (rectangular shape)

[0101] 63 Recess for the driver 62 in the thrust element 5

[0102] 64 Recess for the driver 62 in the ejector element 3

[0103] 65 Fastening element for fastening the driver 62 to the thrust element 51,52,53

[0104] 66 Receptacle for the fastening device 65 within the sliding element 51,52,53

[0105] 67 Receptacle for the fastening element 65 for fastening the driver 62 to the

[0106] Shear element 5

[0107] 671 Implementation within the recording 67

[0108] 672 circulation within the recording 67

[0109] 7 Shear element extension

[0110] 71,72 Designs of the thrust element extension 7

[0111] 8 Fastening means of the thrust element extension 7 to the ejector plate 91

[0112] 9 Tool for a casting process or injection molding process

[0113] 91 Ejector plate

[0114] 92 core plate (movable mold plate)

[0115] 921 ,922,923 Recesses for receiving the ejection heads 41 ,42,43 in the forming area of ​​the core plate 92

[0116] 93 Cavity plate (fixed mold plate, injection molding plate or die-casting plate)

[0117] 95.96 Tool plate (base plate or end plate)

[0118] 97 Ejection stroke of the ejector plate 91 (corresponds to the stroke of the ejection cylinder) 98 Free space between cavity plate 93 and the core plate 92 a Guide angle between the longitudinal axis of the pusher element 5 and the longitudinal axis of the ejector element 3 ß Angle of incidence between the longitudinal axis of the pusher element 5 and the longitudinal axis of the

[0119] Driver 62

[0120] Y Angle of attack between the longitudinal axis of the ejector element 3 and the longitudinal axis of the driver 62

Claims

Claims 1. Device, in particular an inclined ejector (1), for demolding a casting (14) with an undercut (141) from a cavity plate (93) for a casting process or an injection molding process (9), comprising: a guide element (2); an ejector element (3) which is guided in the guide element (2) so as to slide translationally in a first direction and has a first end which can be coupled to an ejector head (4); a pushing element (5) which is guided in the guide element (2) so as to slide translationally in a second direction, wherein the first and the second direction enclose a guide angle of not equal to 0°; a coupling mechanism (6) which is designed to transmit translational movements of the ejector element (3) and the pushing element (5) and in their first and second directions, respectively.second direction mechanically coupled; a stabilizing device (61) arranged between the first end of the ejector element (3) and the guide element (2) in order to reduce a deflection of the ejector element (3) transversely to the first direction of the translational movement of the ejector element (3) or transversely to the second direction of the translational movement of the pushing element (5).

2. Device according to claim 1, wherein the stabilizing device (61) and the coupling mechanism (6) are formed together.

3. Device according to claim 1 or 2, wherein the stabilizing device (61) comprises an elongated driver (62) fixedly arranged on the thrust element (5) as part of the Coupling mechanism (6) which, with respect to its longitudinal extent, projects transversely from the pushing element (5) in a first or second direction of extent, wherein a receptacle (64) is provided on the ejector element (3) in order to guide the driver (62) on the ejector element (3) along the longitudinal extent of the driver (62) when the pushing element (5) is moved translationally, and in order to move the ejector element (3) in the first direction.

4. Device according to claim 1 or 2, wherein the stabilizing device (61) has a driver (62) fixedly arranged on the ejector element (3) as a part of the coupling mechanism (6), which driver projects transversely from the ejector element (3) in a first or second extension direction with respect to its longitudinal extent, wherein a receptacle (63) is provided on the pushing element (5) in order to guide the driver (62) on the pushing element (5) along the longitudinal extent of the driver (62) when the pushing element (5) moves translationally, and in order to move the ejector element (3) in the first direction.

5. Device according to claim 3 or 4, wherein the mechanical coupling of the coupling mechanism (6) is realized in that the driver (62) drives the ejector element (3) in the first direction during a translational movement of the pushing element (5).

6. Device according to one of claims 3 to 5, wherein the longitudinal extent of the driver (62) has an angle of incidence to the first direction of the ejector element (3) or to the second direction of the pushing element (5), which angle is less than 90° or greater than 90° with respect to the first or second direction of the ejector element (3) and / or the pushing element (5) in order to realize a reduction or a transmission between the pushing element (5) and the ejector element (3).

7. Device according to one of claims 3 to 6, wherein the guide element (2) has a guide groove (25) which is arranged to guide the driver (62) in dependence on the translational position of the thrust element (5) within the guide element (2).

8. Inclined ejector (1) with a device according to one of claims 1 to 7, wherein the guide element (2) is arranged in a core plate (92).

9. Inclined ejector (1) with a device according to one of claims 1 to 8, wherein an ejection cylinder, in particular hydraulically driven, is provided which is designed to move the pushing element (5) in the second direction.

Images