Apparatus for the pressing of material
The pressing device addresses the complexity of tool assembly and disassembly by employing a tool-free, positive-locking connection and a mechanical drive system, simplifying the process and reducing operational steps.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- PROVISUR TECHNOLOGIES INC
- Filing Date
- 2025-10-02
- Publication Date
- 2026-07-23
AI Technical Summary
Existing pressing devices for food products require complex assembly and disassembly of pressing tools, necessitating the use of tools like screwdrivers and multiple steps, which complicates the process.
A pressing device with a positive-locking, tool-free connection between the pressing tool and tool holder, utilizing locking pins for easy detachment, and a mechanical drive system with a rotatable eccentric for simplified tool movement, along with tool-less attachment to linear guides and other components.
Facilitates tool-free assembly and disassembly of pressing tools, reducing the need for tools and simplifying the process by minimizing the number of required steps, thereby enhancing operational efficiency.
Smart Images
Figure EP2025078394_23072026_PF_FP_ABST
Abstract
Description
[0001] DESCRIPTION
[0002] Pressing device for pressing material
[0003] Technical field of the invention
[0004] The invention relates to a pressing device for pressing material (e.g. food products).
[0005] Background of the invention
[0006] Pressing devices for pressing food products are known from the prior art (e.g., EP 4301 562 A2). This is particularly advantageous when the food products are subsequently to be sliced, since a pressing process produces a defined product contour even for food products (e.g., raw ham) with an irregular outer product shape.
[0007] Figure 1 shows a part of such a pressing device 1 as known from the prior art. For the sake of simplicity, only those parts of the pressing device 1 that enable pressing in the X-direction are shown. Furthermore, the known pressing device 1 also enables pressing in a Y-direction and a Z-direction, the corresponding parts of the pressing device 1 for pressing in the Y-direction and in the Z-direction are not shown in Figure 1 for the sake of simplicity. The known pressing device 1 initially comprises a base plate 2 on which a slide 3 is slidably guided in the X-direction between two hold-down plates 4, 5, the two hold-down plates 4, 5 forming a linear guide for the slide 3. The slide 3 is connected to a pressing tool 6 by a connecting screw 7, so that the slide 3 is moved together with the pressing tool 6 in the X-direction.The pressing tool 6 is driven by a rotatable eccentric 8, which acts on a pressure piece 9 that is displaceable in the carriage 3 perpendicular to the X-direction. The carriage 3 engages the pressure piece 9 on both sides, so that the movement of the pressure piece 9 is indirectly transmitted to the pressing tool 6 via the carriage 3, both during pressing and retraction movements. Thus, when the eccentric 8 rotates, the carriage 3, together with the pressing tool 6, is moved in the X-direction according to the rotational position of the eccentric 8. For the sake of simplicity, the drive mechanism of the eccentric 8 is not shown and could, for example, be an electric motor.
[0008] A problem with this design of the press device 1 is the relatively complex replacement of the press tool 6. Firstly, the connecting screw 7 must be loosened to separate the press tool 6 from the slide 3. Secondly, the hold-down plates 4 and 5 must also be unscrewed to remove the press tool 6.
[0009] A disadvantage of the known pressing device 1 is therefore the complex assembly and disassembly of the pressing tool 6. Firstly, a screwdriver is required for the assembly and disassembly of the pressing tool 6. Secondly, the assembly and disassembly of the pressing tool 6 require several complex work steps.
[0010] For the technical background of the invention, reference should also be made to WO 2022 / 184454 A2, DE 10 2021 126436 B3, US 3753 398 A, DE 102021003 576 Al, CN 2 20 144544 U, CN 2 21773 299 U and CN 221355540 U.
[0011] Description of the invention
[0012] The invention is therefore based on the objective of creating a correspondingly improved pressing device.
[0013] This problem is solved by a pressing device according to the invention and the main claim.
[0014] The pressing device according to the invention initially comprises, in accordance with the prior art described above, a first pressing tool for pressing the respective material to be pressed (e.g., food products). Furthermore, the pressing device according to the invention, in accordance with the prior art described above, comprises a first tool holder (e.g., a slide) which serves to hold the first pressing tool, wherein the first tool holder (e.g., a slide) is preferably linearly displaceable. In the pressing device according to the invention, the first pressing tool is also detachably connected to the first tool holder (e.g., a slide), as is also the case in the prior art described above. However, the pressing device according to the invention is distinguished from the prior art described above in that the mechanical connection between the first pressing tool and the first tool holder (e.g., a slide) isThe slide can be detached without tools, i.e., in particular without the need for a screwdriver. This significantly simplifies the assembly and disassembly of the press tool.
[0015] In a preferred embodiment of the invention, the first tool holder—as already mentioned—has a slide that is displaceable along a first pressing direction (e.g., the X-direction), as is also the case in the known prior art described above. The connection between the first pressing tool and the slide can be made by a positive-locking, releasable connection secured against loosening by a locking element (e.g., a locking pin), for example, by means of one or more locking pins that are inserted through a bore in the slide and a corresponding bore in the pressing tool, thereby positively locking the slide to the first pressing tool. The connection between the slide and the first pressing tool can therefore be easily released, and in particular without tools (e.g., screwdrivers), by manually removing the locking pins. This simplifies assembly and / or removal.Disassembly of the press tool is significantly simplified compared to the familiar screw connection.
[0016] In the preferred embodiment of the invention, the mechanical drive of the first pressing tool is provided by a press drive with a rotatable eccentric, which acts on the first pressing tool and the slide via a pressure piece. Thus, the eccentric, according to its rotational position, moves the first pressing tool together with the slide along the first pressing direction (e.g., the X-direction). It should be noted that the pressure piece driven by the eccentric bears directly against the first pressing tool to press it directly against the workpiece along the first pressing device (e.g., the X-direction) during a pressing operation. Conversely, the pressure piece driven by the eccentric bears directly against the slide to retract the first pressing tool indirectly via the slide along the first pressing direction (e.g., the X-direction).In contrast to the state of the art described at the beginning, the slide does not grip the pressure piece on both sides, but only on one side, which makes disassembly of the slide easier.
[0017] In the preferred embodiment of the invention, the slide, together with the first pressing tool, is slidably guided between two opposing linear guides (e.g., hold-down plates), as is also the case in the prior art described above. However, in the pressing device according to the invention, the slide and the first pressing tool can be installed and removed without requiring the assembly of the two linear guides (e.g., hold-down plates). For this purpose, only the locking elements (e.g., pins) that connect the slide to the first pressing tool need to be removed. The slide and the first pressing tool can then be pulled out of the pressing device in the first pressing direction (e.g., X-direction), preferably from opposite sides of the pressing device. In the pressing device according to the invention, the assembly or removal of the slide and the first pressing tool is not required.Disassembly of the first press tool is also easier because the linear guides (e.g. hold-down plates) do not need to be removed.
[0018] The parts of the press device according to the invention that enable pressing in the first pressing direction (e.g., X-direction) have been described above. However, the press device according to the invention preferably also enables pressing along a second pressing direction (e.g., Z-direction), as described below. For this purpose, the press device according to the invention preferably has a second tool holder in the form of a press yoke, which is displaceable along the second pressing direction (e.g., Z-direction), with a second pressing tool in the form of a press ram being detachably attached to the press yoke. It should be noted that the press yoke is preferably displaceable linearly along several (e.g., four) guide rods along the second pressing direction (e.g., Z-direction). For this purpose, the guide rods can have spindles to displace the press yoke along the second pressing direction (e.g., Z-direction).
[0019] The detachable connection between the press yoke on the one hand and the press punch on the other hand is preferably made by means of at least one profile T-nut on the press yoke, which engages in a form-fitting manner in at least one corresponding profile groove on the press punch and thereby creates a form-fitting connection between the press yoke on the one hand and the press punch on the other.
[0020] It should be noted that the positive-locking connection between the press yoke on the one hand and the press ram on the other is preferably tensionable and detachable. A tension spring can be used to tension the connection, acting on the profile T-nut and clamping it in the corresponding profile groove. A pivot lever can be provided to release the clamping connection, which is manually pivoted to release the clamping connection.
[0021] Furthermore, it should be noted that the aforementioned press punch should be centered relative to the press yoke during assembly. The press punch is typically elongated in a longitudinal direction, so it should be centered along its longitudinal axis relative to the press yoke. In the preferred embodiment of the invention, the press punch therefore has at least one centering groove oriented transversely to the longitudinal direction of the press punch and featuring an insertion aid, such as an insertion funnel, at one end of the groove. The press yoke correspondingly has at least one centering strip, also oriented transversely to the longitudinal direction of the press punch. During assembly of the press punch to the press yoke, the centering strip on the press yoke engages in the centering groove in the press punch to center the press punch along its longitudinal direction on the press yoke.The press device according to the invention therefore preferably has a centering device to center the press punch relative to the press yoke along the longitudinal direction of the press punch.
[0022] Furthermore, the press ram should also be correctly aligned laterally relative to the press yoke. Therefore, the press ram preferably has at least one transverse groove oriented perpendicular to its longitudinal direction and closed at one end. The press yoke accordingly has at least one stop projecting from the yoke, engaging in the transverse groove of the press ram, and bearing against the end of the groove to position the press ram laterally, perpendicular to its longitudinal direction.
[0023] Preferably, a fine adjustment device is provided to precisely adjust the lateral position of the stop on the press yoke within the transverse groove of the press ram. For example, an adjusting screw can be provided, which is screwed into the end of the transverse groove and, depending on its position, adjusts the lateral position of the stop within the transverse groove and thus also the lateral position of the press ram relative to the press yoke. This fine adjustment of the lateral position of the press ram is particularly important when pressing fresh meat to ensure optimal shaping of the meat being pressed.
[0024] The press device according to the invention therefore preferably includes an alignment device for aligning the press ram relative to the press yoke transversely to the longitudinal direction of the press ram and for positioning it laterally. Furthermore, the alignment device can also align the press ram relative to the press yoke in the longitudinal direction of the press ram.
[0025] The parts of the press device according to the invention that enable pressing in the first pressing direction (e.g., X-direction) and in the second pressing direction (e.g., Z-direction) have been described above. However, the press device according to the invention preferably also enables pressing along a third pressing direction (e.g., Y-direction), as described below.
[0026] For this purpose, the pressing device according to the invention preferably has a third tool holder that is displaceable along the third pressing direction (e.g., the Y-direction), for example, by means of a hydraulic cylinder acting on the third tool holder. A third pressing tool in the form of a press ram is attached to the third tool holder. The press ram is attached to the third tool holder by means of a displaceable locking element, for example, a piston rod head on a piston rod that is displaceable in the third pressing direction (e.g., the Y-direction), for example, by means of a pneumatic cylinder. The press ram has a receiving bore to receive the locking element (e.g., piston rod head) and anchor it in the receiving bore. In addition, the press ram has a locking bolt that is transverse to the third pressing direction (e.g., the Y-direction).The locking bolt is movable in the Y-direction between a locking position and an unlocking position. A transverse bore in the locking bolt accommodates the locking element (e.g., piston rod head). In its locked position, the locking bolt secures the locking element (e.g., piston rod head) in the transverse bore of the locking bolt, thus firmly connecting the press ram to the locking element (e.g., piston rod head) and consequently to the third tool holder. In the unlocking position of the locking bolt, the locking element (e.g., piston rod head) can be pulled out of the locking bolt, allowing for the assembly or disassembly of the press ram.
[0027] Preferably, a spring (e.g., a coil spring) is provided to pre-tension the locking bolt into the locked position. Therefore, when assembling or disassembling the press die, the locking bolt must be actively moved into the unlocked position.
[0028] A first embodiment of the invention has been described above, which enables pressing in the third pressing direction (e.g., the Y-direction). However, the invention also includes a further embodiment that enables pressing along the third pressing direction (e.g., the Y-direction) and is described below.
[0029] In this further embodiment of the invention, a third tool holder is also provided, which is displaceable along the third pressing direction (e.g., the Y-direction), for example, by means of a hydraulic cylinder. This third tool holder also has a displaceable locking element (e.g., a piston rod head) that serves to lock a third pressing tool, in this case a press ram. The locking element (e.g., the piston rod head) is displaceable relative to the third tool holder along the third pressing direction (e.g., the Y-direction) and can be anchored in the press ram to mount the press ram to the third tool holder. For this purpose, the locking element (e.g., the piston rod head) has an annular groove into which a locking bolt can engage, which is displaceable transversely to the third pressing direction (e.g., the Y-direction) between a locked position and an unlocked position.In its locked position, the locking bolt engages in the annular groove in the locking element (e.g., piston rod head) and thereby secures the locking element (e.g., piston rod head) in the receiving bore of the press ram. In its unlocked position, the locking bolt is pulled out of the annular groove in the locking element (e.g., piston rod head), releasing the locking element (e.g., piston rod head), so that the press ram can be installed and removed in the unlocked position of the locking bolt.
[0030] Preferably, a spring is provided to lock the locking bolt in the locked position to prevent unintentional release of the locking bolt. This spring can, for example, be a torsion spring that engages the locking bolt in a positive and frictional manner.
[0031] Furthermore, the piston rod head can be held in the receiving bore of the press ram by a spring to minimize play, for example by a Belleville spring.
[0032] Finally, the pressing device according to the invention can also have a counter bearing which, during pressing in the first pressing direction (e.g., X-direction), forms a counter bearing for the material being pressed (e.g., food product). For this purpose, a fastening element can be arranged on a base plate, to which a fourth pressing tool is detachably attached, wherein a clamping element (e.g., wing nut, eccentric screw) that can be operated without tools is mounted in the fastening element. The connection between the fourth pressing tool and the fastening element is preferably made by means of a profile groove into which the clamping element engages by means of a profile T-nut, thereby creating a positive-locking connection.
[0033] The tool-free clamping element (e.g. wing screw, eccentric screw) can be pre-tensioned by an elastic element (e.g. spring column) to prevent unintentional loosening of the clamping element.
[0034] Furthermore, it should be generally mentioned that the three pressing directions are preferably aligned at right angles to each other and enclose a pressing chamber.
[0035] Furthermore, it should be noted that the pressing device according to the invention is preferably designed for pressing food products. However, the invention is not limited to pressing food products with regard to the material to be pressed and the design of the pressing device. Rather, materials other than food products can also be pressed within the scope of the invention.
[0036] Other advantageous embodiments of the invention are characterized in the dependent claims or are explained in more detail below together with the description of the preferred embodiment of the invention with reference to the figures.
[0037] Brief description of the drawings
[0038] Figure 1 shows a perspective view of part of a conventional press for pressing food products.
[0039] Figure 2 shows a perspective view of a pressing device according to the invention for pressing food products in three pressing directions.
[0040] Figure 3 shows a perspective view corresponding to the perspective view from Figure 1 with an improvement according to the invention.
[0041] Figure 4 shows a sectional view through Figure 4.
[0042] Figure 5 shows a perspective view of another part of the press device according to the invention as shown in Figure 2 for pressing the food products in a Z direction.
[0043] Figure 6 shows an enlarged perspective view of a part from Figure 5 with a movable press yoke. Figure 7 shows a perspective view of a press punch that can be connected to the press yoke shown in Figure 5.
[0044] Figure 8 shows another part of the pressing device according to Figure 2 for pressing the food products in a Y direction, with one press ram removed.
[0045] Figure 9 shows a perspective view of the part of the press device for pressing in the Y direction, with the press ram mounted.
[0046] Figure 10 shows a sectional view through the parts of the press device according to Figures 8 and 9.
[0047] Figure 11 shows a perspective view of the locking bolt shown in Figures 9 and 10.
[0048] Figure 12 shows a sectional view in the area of the locking bolt.
[0049] Figure 13 and Figure 14 show an alternative construction for pressing in the Y direction.
[0050] Figure 15 shows a sectional view through the ball rod head with an additional disc spring to minimize play.
[0051] Figure 16 shows another part of the pressing device according to Figure 2 with a pressing tool as a counter bearing during pressing.
[0052] Figure 17 shows a perspective view of the press tool from Figure 16.
[0053] Figure 18 shows a different perspective view corresponding to Figures 16 and 17.
[0054] Detailed description of the drawings
[0055] The following describes an embodiment of a press device 1 according to the invention, as shown in Figures 2 to 18. It should be noted that the press device 1 according to the invention partially corresponds to the known press device 1 as shown in Figure 1 and described above. To avoid repetition, reference is therefore made to the preceding description, using the same reference numerals for corresponding details. A special feature of the press device 1 according to the invention is the connection between the slide 3 and the press tool 6. This connection is achieved by two locking pins 10, 11, each inserted into a bore in the slide 3 and a corresponding bore in the press tool 6, thereby creating a positive-locking connection between the slide 3 and the press tool 6.When the slide 3 moves, the pressing tool 6 also moves together with the slide 3. An advantage of this connection between the slide 3 and the pressing tool 6 is that the connection can be made and detached without tools, since the locking pins 10, 11 can simply be inserted into and removed from their corresponding bores. Therefore, no screwdriver is required to assemble or disassemble the pressing tool 6.
[0056] Another special feature of the pressing device 1 according to the invention is that the slide 3 no longer engages the pressure piece 9 on both sides, but only rests against it on one side. The pressure piece 9 thus rests directly against the pressing tool 6 on one side, in order to press the pressing tool 6 directly against the workpiece during a pressing operation. On the opposite side, the pressure piece 9 rests against the slide 3, in order to retract the slide 3, together with the pressing tool 6 mounted on it, away from the workpiece. This is advantageous because the slide 3 can be easily mounted and dismounted without having to remove the hold-down plates 4, 5. To dismount the slide 3, only the locking pins 10, 11 need to be removed. The slide 3 can then simply be pulled out between the mounted hold-down plates 4, 5.The same applies to the pressing tool 6, which, after removing the locking pins 10, 11, can simply be pulled out of the pressing device 1 in the opposite direction between the mounted hold-down plates 4, 5. Therefore, it is no longer necessary to unscrew the hold-down plates 4, 5 for the assembly or disassembly of the pressing tool 6.
[0057] This design according to the invention therefore offers two advantages. Firstly, no tool (e.g., screwdriver) is required for the assembly or disassembly of the pressing tool 6. Secondly, fewer work steps are required for the assembly or disassembly of the pressing tool 6, since the hold-down plates 4, 5 no longer need to be removed.
[0058] Furthermore, the press device 1 according to the invention also enables the pressing of the material to be pressed (e.g., a food product) in the Z-direction, as can be seen in particular from Figures 2, 5, 6, and 7 and is described below. For this purpose, the press device 1 has a press yoke 12 which is linearly displaceable in the Z-direction on four guide rods 13-16. The displacement of the press yoke 12 in the Z-direction is effected by four spindles 17-20 by means of a drive, which is not shown for the sake of simplicity.
[0059] On its underside, the press yoke 12 is connected to a press punch 21, which is shown in detail in Figure 7.
[0060] The connection between the press yoke 12 and the press punch 21 is positively engaged by two profile T-nuts 22, 23 on the press yoke 12, wherein the profile T-nuts 22, 23 engage in corresponding profile grooves 24, 25 in the press punch 21 and thereby create a positively engaged connection.
[0061] The positive-locking connection between the profile T-nuts 22, 23 on the one hand and the corresponding profile grooves 24, 25 on the other hand can be pre-tensioned. Two pivot levers 26, 27 and tension springs 28 serve this purpose, as can be seen particularly in Figure 6. The tension springs 28 clamp the profile T-nuts 22, 23 in the corresponding profile grooves 24, 25. This clamping connection can be released by pivoting the respective pivot levers 26, 27.
[0062] The mounting of the press punch 21 on the press yoke 12 is facilitated by a centering device. For this purpose, the press punch 21 has a centering groove 29 on its upper side, which extends perpendicular to the longitudinal direction L of the press punch 21. At one end of the groove, the centering groove 29 widens in a funnel shape to facilitate the insertion of a centering strip 30, which is arranged on the underside of the press yoke 12.
[0063] Furthermore, the press 1 also has a positioning device for laterally positioning the press ram 21 relative to the press yoke 12. For this purpose, two transverse grooves 31, 32 are arranged in the upper surface of the press ram 21, which are closed at one end, with an adjusting screw 33, 34 located in the bottom of each groove. Correspondingly, two stops 35, 36 are located on the underside of the press yoke 12, which, in the assembled state, engage in the transverse grooves 31, 32 and rest against the ends of the transverse grooves 31, 32. The adjusting screws 33, 34 allow adjustment of the lateral alignment of the press ram 21 relative to the press yoke 12. The parts of the press 1 that enable pressing of the material to be pressed (e.g., food product) in the X and Z directions have been described above.Furthermore, the press device 1 according to the invention also enables pressing in the Y-direction, as is shown in particular in Figures 8 to 15 and described below. Figures 8-12 show a first embodiment of the invention for pressing in the Y-direction, while Figures 13-15 show a second embodiment of the invention for pressing in the Y-direction. The first embodiment of the invention for pressing in the Y-direction, which is shown in Figures 8-12, will now be described first.
[0064] For pressing in the Y direction, the press device 1 has a further tool holder 37, which is plate-shaped and can be moved in the Y direction by a hydraulic cylinder 38.
[0065] A press ram 39 can be mounted on the plate-shaped tool holder 37. For this purpose, the press device 1 has a pneumatic cylinder 40 that can move a piston rod with a piston rod head 41 in the Y-direction. The press ram 39 has a receiving bore for the piston rod head 41 to anchor the piston rod head 41 in the receiving bore of the press ram 39. In addition, a locking bolt 42 is provided, which is displaceable in the receiving bore of the press ram 39 perpendicular to the Y-direction and has a transverse bore 43 for receiving the piston rod head 41. The locking bolt 42 is displaceable between a locked position and an unlocked position.
[0066] In its locking position, the locking bolt 42 secures the piston rod head 41 in the receiving bore of the press ram 39. The pneumatic cylinder 40 can then pull the press ram 39 towards the tool holder 37 to establish the connection between the tool holder 37 and the press ram 39.
[0067] If, on the other hand, the locking bolt 42 is moved into its unlocked position, the piston rod head 41 can be pulled out of the receiving bore of the press ram 39 in order to mount or dismount the press ram 39.
[0068] It should be noted that the locking bolt 42 is pre-tensioned into its locking position by a coil spring 44. To assemble or disassemble the press ram 39, the locking bolt 42 must therefore be pressed down into its unlocked position against the pre-tension force of the coil spring 44, which can be done manually without tools. The second embodiment of the invention for pressing in the Y-direction, illustrated in Figures 13 to 15, will now be described. This embodiment partially corresponds to the first embodiment of the invention for pressing in the Y-direction, described above and illustrated in Figures 8 to 12. Therefore, to avoid repetition, reference is made to the preceding description, using the same reference numerals for corresponding details.
[0069] A special feature of this embodiment of the invention is that the piston rod head 41 has an annular groove 45 for locking the press ram 39 to the tool holder 37. The locking bolt 42 can engage in the annular groove 45 for this purpose. Furthermore, a torsion spring 46 is provided, which engages positively and frictionally in the locking bolt 42 to prevent unintentional loosening of the connection.
[0070] Figure 15 additionally shows a disc spring 47 in the piston rod head 41, the disc spring 47 serving to minimize play.
[0071] Figures 16 to 18 are described below, showing a counter bearing that acts on the material being pressed (e.g., food product) during pressing in the X direction.
[0072] For this purpose, a further pressing tool 48 is arranged on the base plate 2 of the pressing device 1, wherein the pressing tool 48 is mounted to a fastening element 50 by means of a wing screw 49. It should be noted that the pressing tool 48 only forms a counter bearing and therefore remains stationary on the base plate 2 during a pressing operation.
[0073] A centering nose 51 is formed on the pressing tool 48 to center the pressing tool 48.
[0074] Furthermore, the press tool 48 has a profile groove 52 into which a corresponding profile T-nut 53 can engage.
[0075] Furthermore, it should be mentioned that the impeller screw 49 is pre-tensioned by a spring column 54 to prevent unintentional loosening of the impeller screw 49.
[0076] The invention is not limited to the preferred embodiments of the invention described above. Rather, the invention also includes further variants and modifications that likewise make use of the inventive concept and therefore fall within the scope of protection. In particular, the invention also claims protection for the subject matter and the features of the dependent claims independently of the respective referenced claims and, in particular, also without the features of the main claim. The invention thus comprises various aspects of the invention that enjoy independent protection. For example, the invention includes press mechanisms for pressing in three directions (X, Y, Z), these press mechanisms enjoying independent protection.
[0077] Advantages of the invention
[0078] Firstly, the invention enables tool-free assembly and disassembly of the individual pressing tools. In contrast to the known pressing device described above, replacing the pressing tool no longer requires a screwdriver.
[0079] On the other hand, the assembly and disassembly of the press tool is also simplified, as fewer work steps are required because the hold-down plates no longer need to be removed.
[0080] Reference symbol list
[0081] 1 Pressing device
[0082] 2 Base plate of the press device
[0083] 3 sleds
[0084] 4, 5 hold-down plates
[0085] 6 Pressing tool for pressing in the X direction
[0086] 7 Printing piece
[0087] 8 eccentrics
[0088] 9 Connecting screw for detachable connection of slide and pressing tool 10, 11 Locking pin for connecting slide and pressing tool
[0089] 12 Pressjoch
[0090] 13-16 guide rods for guiding the press yoke
[0091] 17-20 spindles for moving the press yoke in the Z direction
[0092] 21 press dies for pressing in the Z direction
[0093] 22, 23 Profile T-nuts on the press yoke; 24, 25 Profile grooves in the press die
[0094] 26, 27 Swivel lever on the press yoke for releasing the clamping connection between the profile T-nuts of the press yoke and the profile grooves of the press punch
[0095] 28 tension springs for pre-tensioning the connection between the profile T-nuts of the press yoke and the profile grooves of the press punch
[0096] 29 Centering groove in the press die for centering the press die and press yoke along the longitudinal direction L
[0097] 30 Centering strip on the press yoke for centering the press punch and press yoke along the longitudinal direction L
[0098] 31, 32 Transverse grooves in the press punch for lateral alignment of the press punch relative to the press yoke
[0099] 33, 34 Adjusting screws for fine-tuning the lateral alignment of the press ram relative to the press yoke
[0100] 35, 36 stops on the press yoke for lateral alignment of the press ram relative to the press yoke
[0101] 37 tool holders for pressing in the Y direction
[0102] 38 hydraulic cylinders for pressing in the Y direction
[0103] 39 Press dies for pressing in the Y direction
[0104] 40 pneumatic cylinders for locking the press ram to the tool holder
[0105] 41 Piston rod head for locking the press ram to the tool holder
[0106] 42 locking bolts
[0107] 43 Transverse bore of the locking bolt for receiving the piston rod head
[0108] 44 Coil spring for pre-tensioning the locking bolt into its locking position
[0109] 45 Ring groove in the piston rod head
[0110] 46 Torsion spring for locking the locking bolt in the annular groove of the piston rod head
[0111] 47 Disc springs for minimizing play
[0112] 48 Press tool as counter bearing during pressing in the Y direction
[0113] 49 Wing screw for clamping the pressing tool
[0114] 50 fastening elements
[0115] 51 centering lugs on the pressing tool
[0116] 52 profile groove in the pressing tool
[0117] 53 Profile T-nut
[0118] 54 Spring column for pre-tensioning the wing screw; Longitudinal direction of the press ram; 21 X Pressing direction
[0119] Y Pressing direction
[0120] Z Pressing direction
Claims
REQUIREMENTS 1. Pressing device (1) for pressing material, in particular for pressing food products, with a) a first pressing tool (6) for pressing the material to be pressed, b) a first tool holder (3) for holding the first pressing tool (6), wherein the first tool holder (3) is preferably movable, and c) a detachable first connection (10, 11) between the first pressing tool (6) and the first tool holder (3), characterized by d) that the first connection (10, 11) between the first pressing tool (6) and the first tool holder (3) can be detached without tools.
2. Pressing device (1) according to claim 1, characterized in that, a) that the first tool holder (3) has a slide (3) which is displaceable along a first pressing direction (X), and b) that the first connection (10, 11) between the first pressing tool (6) and the first tool holder (3) is a positive-locking, releasable connection and preferably secured against loosening by a locking element (10, 11), in particular by means of a locking pin (10, 11) which engages on one side in a bore in the slide (3) and on the other side in a bore in the first pressing tool (6) and thereby positively connects the first pressing tool (6) to the slide (3), and c) that the at least one locking pin (10, 11) is preferably aligned perpendicular to the first pressing direction (X).
3. Pressing device (1) according to claim 2, characterized in that, a) that the pressing device (1) has a pressing drive to move the first tool holder (3) with the first pressing tool (6) mounted thereon along the first pressing direction (X), b) that the press drive has a rotatable eccentric (8), c) that the eccentric (8) displaces a pressure piece (9) along the first pressing direction (X) according to its rotational position, d) that the pressure piece (9) on the one hand rests directly against the first pressing tool (6) in order to press the first pressing tool (6) directly against the material being pressed along the first pressing direction (X) during a pressing operation, and e) that the pressure piece (9) on the other hand rests against the slide (3) in order to indirectly withdraw the first pressing tool (6) from the pressing material via the slide (3) along the first pressing direction (X).
4. Pressing device (1) according to claim 2 or 3, characterized in that, a) that the slide (3) together with the first pressing tool (6) is slidably guided between two opposing linear guides (4, 5), wherein the two linear guides are preferably hold-down plates (4, 5) which press the slide (3) downwards, and b) that the slide (3) and the first press tool (6) can be installed and removed without tools, without the need to dismantle the two linear guides (4, 5).
5. Pressing device (1) according to claim 4, characterized in that, a) that the slide (3) and the first pressing tool (6) can be inserted into the pressing device (1) for mounting the first pressing tool (6) along the first pressing direction (X) when the at least one locking element (10, 11) is removed, in the assembled state of the two linear guides (4, 5), and b) that the slide (3) and the first pressing tool (6) can be pulled out of the pressing device (1) for disassembly of the first pressing tool along the first pressing direction (X) when the at least one locking element (10, 11) has been removed and in the assembled state of the two linear guides (4, 5).
6. Pressing device (1) according to one of the preceding claims, characterized in that a) the pressing device (1) has a second tool holder (12) in the form of a press yoke (12) which is displaceable along a second pressing direction (Z), b) that the pressing device (1) has a second pressing tool (21) in the form of a pressing punch (21), c) that a second detachable connection (22, 23, 24, 25) is provided between the press yoke (12) and the press ram (21), d) that the press yoke (12) is preferably guided linearly along the second pressing direction (Z) on several guide rods (13-16), e) that the press yoke (12) is preferably displaceable in the second pressing direction (Z) by means of spindles (17-20).
7. Pressing device according to claim 6, characterized by a) a centering device (29, 30) for centering the press punch (21) relative to the press yoke (12) along the longitudinal direction (L) of the press punch (21), and / or b) an alignment device (31-36) for lateral alignment of the press punch (21) relative to the press yoke (12) transverse to the longitudinal direction (L) and / or parallel to the longitudinal direction of the press punch (21).
8. Pressing device (1) according to claim 6 or 7, characterized in that, a) that the second connection (22, 23, 24, 25) between the press yoke (12) and the press punch (21) has at least one profile T-nut (22, 23) on the press yoke (12), b) that the second connection (22, 23, 24, 25) between the press yoke (12) and the press punch (21) has at least one profile groove (24, 25) in the press punch (21), and c) that the profile T-nut (22, 23) on the press yoke (12) engages in the profile groove (24, 25) in the press punch (21) to connect the press punch (21) to the press yoke (12) in a form-fitting manner.
9. Pressing device (1) according to claim 8, characterized in that, a) that the profile T-nut (22, 23) of the press yoke (12) can be clamped in the profile groove (24, 25) of the press punch (21), b) that a pivot lever (26, 27) is preferably provided for clamping the profile T-nut (22, 23) in the profile groove (24, 25), which, depending on its pivot position, clamps or releases the profile T-nut (22, 23) of the press yoke (12) in the profile groove (24, 25) of the press ram (21), c) that the profile T-nut (22, 23) of the press yoke (12) is preferably preloaded in the profile groove (24, 25) of the press ram (21), in particular by means of a compression spring (28).
10. Pressing device (1) according to one of claims 6 to 9, characterized in that, a) that the press punch (21) is elongated along a longitudinal direction (L), b) that the press punch (21) has at least one centering groove (29) which is oriented transversely to the longitudinal direction (L) of the press punch (21) and has an insertion aid at one end of the groove, in particular in the form of an insertion funnel, c) that the press yoke (12) has at least one centering strip (30) which is oriented transversely to the longitudinal direction (L) of the press punch (21), and d) that the centering strip (30) on the press yoke (12) engages in the centering groove (29) in the press punch (21) to center the press punch (21) along the longitudinal direction (L) of the press punch (21) on the press yoke (12).
11. Pressing device (1) according to one of claims 6 to 10, characterized in that a) the press ram (21) is elongated along a longitudinal direction (L), b) that the press punch (21) has at least one transverse groove (31, 32) which is oriented transversely to the longitudinal direction (L) of the press punch (21) and is closed at one end of the groove, c) that the press yoke (12) has at least one stop (35, 36) which extends from the press yoke (12) and engages in the transverse groove (31, 32) of the press punch (21) and bears against the end of the transverse groove (31, 32) in order to position the press punch (21) laterally transversely to the longitudinal direction (L) of the press punch (21).
12. Pressing device (1) according to claim 11, characterized by a fine adjustment device (33, 34) for fine adjustment of the lateral position of the stop on the press yoke (12) in the transverse groove (31, 32) of the press ram (21), in particular by means of an adjusting screw (33, 34) or an eccentric.
13. Pressing device (1) according to one of the preceding claims, characterized in that a) the pressing device (1) has a third tool holder (37) which is displaceable along a third pressing direction (Y), in particular by means of a hydraulic cylinder (38), b) the third tool holder (37) has a displaceable locking element (41) for locking a third pressing tool (39) on the third tool holder (37), in particular a piston rod head (41) of a displaceable piston rod, wherein the piston rod is preferably displaceable by means of a pneumatic cylinder (40), c) the third pressing tool (39) is a pressing punch (39) which is mounted on the locking element (41), d) that the press ram (39) has a receiving bore to receive the locking element (41) and to anchor it in the receiving bore, e) that the press ram (39) has a locking bolt (42) which is displaceable transversely to the third pressing direction (Y) between a locking position and an unlocking position, f) that the locking bolt (42) has a transverse bore into which the locking element (41) can be inserted, g) that the locking bolt (42) in its locking position locks the detent element (41) in the transverse bore (43) of the locking bolt (42), so that the press ram (39) is firmly connected to the detent element (41) in the locking position of the locking bolt (42), and h) that the locking bolt (42) in its unlocked position unlocks the detent element (41) in the transverse bore (43) of the locking bolt (42), so that the press punch (39) can be installed and removed in the unlocked position of the locking bolt (42).
14. Pressing device (1) according to claim 13, characterized in that the locking bolt (42) is biased into the locking position by a spring (44), in particular by a coil spring (44).
15. Pressing device (1) according to one of claims 1 to 12, characterized in that a) the pressing device (1) has a third tool holder (37) which is displaceable along a third pressing direction (Y), in particular by means of a hydraulic cylinder (38), b) that a third pressing tool (39) in the form of a press ram (39) is detachably mounted on the third tool holder (37), c) that the third tool holder (37) has a locking element (41) for locking the third pressing tool (39) to the third tool holder, in particular a piston rod head (41) on a displaceable piston rod, wherein the locking element (41) is preferably displaceable along the third pressing direction (Y) by means of a pneumatic cylinder (40), d) that the locking element (41) has an annular groove (45), e) that the press ram (39) has a receiving bore to receive the locking element (41) and to anchor it in the receiving bore, f) that the press ram (39) has a locking bolt (42) which is displaceable transversely to the third pressing direction (Y) between a locking position and an unlocking position, g) that the locking bolt (42) engages in its locking position in the annular groove (45) in the locking element (41) and thereby locks the locking element (41) in the receiving bore of the press ram (39), h) that the locking bolt (42) is pulled out of the annular groove (45) in the locking element (41) in its unlocking position and thereby releases the locking element (41), so that the press ram (39) can be mounted and dismounted in the unlocking position of the locking bolt (42).
16. Pressing device (1) according to claim 15, characterized in that the locking bolt (42) is held in the locking position by a spring (46) in a positive locking and / or force locking manner, in particular by a torsion spring (46).
17. Pressing device (1) according to claim 15 or 16, characterized in that the piston rod head is held in the receiving bore of the press ram (39) by a spring (47) to minimize play, in particular by a disc spring (46).
18. Pressing device (1) according to one of the preceding claims, characterized in that a) the pressing device (1) has a base plate (2), b) that a fastening element (50) is arranged on the base plate (2), c) that the pressing device (1) has a fourth pressing tool (48) which is detachably attached to the fastening element (50), wherein the fourth pressing tool (48) is preferably fixedly arranged on the base plate (2), d) that a tool-free clamping element (49) is mounted in the fastening element (50), e) that the fourth pressing tool (48) has at least one profile groove (52), and f) that the clamping element (49) engages in the profile groove (52) of the fourth press tool (48) to clamp the fourth press tool to the fastening element (50).
19. Pressing device (1) according to claim 18, characterized in that, a) that the tool-free operable clamping element (49) is a wing screw (49) or an eccentric clamp, and / or b) that the tool-free clamping element (49) in the fastening element is pre-tensioned by an elastic element (54), in particular by a spring column (54), to prevent loosening of the clamping element (49), and / or c) that the fourth pressing tool (48) has a centering lug (51) at each of its opposite ends to position the fourth pressing tool (48) positively on the fastening element (50), in particular in the first pressing direction (X) and in the third pressing direction (Y).
20. Pressing device (1) according to one of the preceding claims, characterized in that a) the three pressing directions (X, Y, Z) are each arranged in pairs at right angles to each other, and / or b) that the first pressing tool (6) and the fourth pressing tool (48) are arranged on opposite sides of a pressing chamber, and / or c) that the stationary fourth pressing tool (48) forms a counter bearing for the movable first pressing tool (6).