EP3713691A1

EP3713691A1 - Decoring machine for decoring cast workpieces, and method for producing cast workpieces

Info

Publication number: EP3713691A1
Application number: EP18829177.7A
Authority: EP
Inventors: Alois Boindecker; Thomas MURAUER
Original assignee: Fill GmbH
Current assignee: Fill GmbH
Priority date: 2017-11-22
Filing date: 2018-11-19
Publication date: 2020-09-30
Anticipated expiration: 2038-11-19
Also published as: AT520666B1; CN111417475A; CN111417475B; AT520666A1; US20200346282A1; WO2019100092A1; MX2020005184A; EP3713691B1; US11065683B2

Abstract

The invention relates to a decoring machine (1) for decoring cast workpieces (2). The decoring machine (1) comprises: - a machine frame (3); - a machine table (6), which is coupled to the machine frame (3) by means of a mounting bracket (7); - a first eccentric mass (10), which is mounted in a rotatable manner on the machine table (6); - a second eccentric mass (12), which is mounted in a rotatable manner on the machine table (6), wherein the second eccentric mass (12) is driven in the opposite direction to the first eccentric mass (10); - a workpiece carrier (21) for receiving the cast workpiece (2) to be decored, wherein the workpiece carrier (21) is coupled to the machine table (6) by means of a rotary mounting (22), wherein the rotary mounting (22) is configured such that the workpiece carrier (21) is mounted so as to be rotatable about a horizontal axis of rotation (23) relative to the machine table (6).

Description

Entkernmaschine for coring of cast workpieces and methods for producing cast workpieces

The invention relates to a Entkemmaschine or vibrating machine.

A Entkemmaschine / vibrating machine of the type mentioned is basically known. For example, AT 517 133 A1 discloses a decoring machine. The decoring machine comprises a first machine frame, a machine table movably supported relative to the first machine frame for clamping a workpiece, two eccentric masses driven in opposite directions and mounted on the machine table and at least one drive motor arranged on the first machine frame. A force or torque flow from the at least one drive motor to the two eccentric masses is guided so that a branch and / or a merger in the power flow / torque flow res- pective means for synchronizing the two eccentric masses are arranged on the first Maschinenrah men. In addition, the power flow / torque flow between the first Ma machine frame and the machine table is guided in each case via at least one leading to an eccentric mass belt.

A disadvantage of this arrangement that the transmission for the synchronization of the two A weed shafts respectively Exzentermassen strong vibrations is exposed and the Entkern machine / vibrating machine therefore has only a comparatively short life. Dar also act on rotation of the first machine frame centrifugal forces on these, wel che are caused by the rotating eccentric masses.

An object of the invention is therefore to provide an improved Entkernmaschine / vibrating machine.

This object is achieved by a decoring machine according to the claims.

According to a deskewing machine for coring castings is vorgese hen. The decoring machine includes:

- A machine frame, which can be set up on a machine base; a machine table which is coupled to the machine frame by means of a suspension, wherein the machine table is movably mounted by means of the suspension at least in a main movement direction relative to the machine frame;

- A first eccentric mass, which is rotatably mounted on the machine table;

- A second eccentric mass, which is rotatably mounted on the machine table, wherein the second eccentric mass is driven in opposite directions to the first eccentric mass;

a workpiece carrier for receiving the cast workpiece to be cored,

characterized in that

the workpiece carrier is coupled by means of a rotary bearing with the machine table, wherein the rotary bearing is designed such that the workpiece carrier is rotatable about a horizontal axis of rotation relative to the machine table.

The Entkernmaschine invention has the advantage that the workpiece carrier can be rotated by means of the pivot bearing relative to the machine table. Thus, the entire machine table does not need to be rotated to tilt the cast workpiece. The particular advantage here is that the eccentric masses to excite the Schwingbe movement of the machine table do not need to be rotated, which would lead to the introduction of centrifugal forces in the machine table.

Furthermore, it may be expedient if the suspension comprises a leaf spring, wherein the leaf spring is coupled at its two longitudinal ends by means of a rotary joint with the machine frame and in the region of its longitudinal center with the machine table. In particular, it can be provided in this case that the swivel joints, on which the leaf spring is received, have a rubber buffer, so that a shortening of the leaf spring, which arises due to the deflection, can be compensated. The advantage here is that such a leaf spring is well suited for receiving the vibrations.

In particular, it can be provided that the leaf spring is installed vertically standing in the Entkernma machine. This can be achieved that the leaf springs are mainly stressed to train / pressure or bending load. Furthermore, it can be provided that the pivot bearing is designed in the form of a turntable. The advantage here is that the turntable can take high bending moments around the axis of rotation and thereby have a cost-effective design.

In addition, it can be provided that a rotary drive is formed, by means of which the workpiece carrier is rotatable relative to the machine table. By this measure, the workpiece carrier can be automatically rotated relative to the machine table.

Also advantageous is an expression, according to which it can be provided that the Drehan drive a drive motor with a rotary drive pulley and wrapped around the rotary drive pulley traction means, wherein the drive motor on the machine frame aufgenom men, wherein the traction means is coupled to the workpiece carrier. The advantage here is that by this measure, the drive motor of the rotary drive is no vibration is set and thus the drive motor can have an increased life.

According to a development, it is possible that the traction means has a first longitudinal end and a second longitudinal end, wherein the first longitudinal end and the second longitudinal end are respectively connected to the workpiece carrier and wherein the rotary drive disc is disposed between the first longitudinal end and the second longitudinal end. In such Ausfüh tion, the first longitudinal end and the second longitudinal end of the traction means are connected to the workpiece carrier, whereby no teeth on the workpiece carrier is necessary to bring the traction means with the workpiece carrier in engagement.

Further, it may be appropriate if at least one of the eccentric masses is coupled terantriebsmotor with an Exzen, wherein the eccentric drive motor is arranged on the machine frame is. The advantage here is that the eccentric drive motor is no vibration is set and thus can have an increased life.

In addition, it can be provided that the eccentric drive motor, a drive pulley is arranged and on the eccentric mass an output disk is arranged, wherein a drive belt to the drive pulley and the driven pulley is wound, with one drawn between the axis of rotation of the drive pulley and the axis of rotation of the driven pulley Especially at an angle between 85 ° and 95 ° to the main direction of movement of the Machine table is available. By this measure, it can be prevented that the oscillatory movement of the machine table in the main direction of movement leads to a damaging elongation or to an introduction of force into the drive belt.

Furthermore, it can be provided that the two eccentric masses are rotatably connected to one another by means of a synchronization means. The advantage here is that only one of the two eccentric masses must be driven with an eccentric drive motor and the second eccentric mass can be operated synchronized by means of the synchronization means in the opposite direction of rotation, however, in the rotational speed with the first eccentric mass.

Of course, it is also possible that each of the eccentric masses is coupled to an eccentric drive motor and in addition a synchronization means for mechanically synchronizing the two eccentric masses is provided.

According to a particular embodiment, it is possible that the first eccentric mass is coupled to a first synchronization disc and the second eccentric mass is coupled to a second synchronization disc, wherein the synchronization means comprises a synchronization belt, which is deflected around LTmlenkscheiben such that an inner side of the timing belt is in operative connection with the first synchronization disc and an outer side of the timing belt is in operative connection with the second synchronization disc. Such synchronization by means of a synchronization belt can be realized inexpensively and also have a high degree of robustness.

Alternatively, it may be provided that the synchronization means by a first tooth wheel, which is coupled to the first eccentric mass and a second gear, which is coupled to the second eccentric mass is formed. The two gears are in direct intervention into each other.

According to an advantageous development it can be provided that at Werkstückträ ger at least one Entkemhammer, in particular a hydraulically acting Entkernhammer is arranged, which has a hammer head, which is to act on a workpiece is trained. By means of the Entkemhammer can be acted upon in addition to the shaking movement of Maschi nentisches on the cast workpiece. This makes it easier to break or remove the sand cores from the cast workpieces.

In particular, it may be advantageous if the decocking hammer is arranged on the workpiece carrier such that a direction of action of the deconing hammer is parallel to the main direction of movement. The advantage here is that by this measure acting on the Entkernham mer acceleration forces in the effective direction of the Entkernhammers and thus do not represent excessive stress on the Entkernhammer.

Furthermore, it can be provided that the Entkemhammer is movable transversely to the main direction of movement re relatively to the workpiece carrier.

In addition, it can be provided that the Entkemhammer is displaceable in the main direction of movement relative to the workpiece carrier. As a result of this measure, the flexibility of the decoring machine can be improved so that various cast workpieces can be gutted on the deskewer machine.

Also advantageous is an embodiment, according to which it can be provided that two Entekemhämmer are arranged on the workpiece carrier, wherein the workpiece carrier has a support table which is mounted by means of a self-aligning bearing on a base frame of Werkstückträ gers. By means of the self-aligning bearing dimensional tolerances of the cast workpiece can be compensated so that both decor hammer can act evenly on the cast workpiece.

According to a development, it is possible that a brake is formed, by means of which the machine table can be braked relative to the machine frame. Due to the brake, the machine table can be decelerated after completion of the coring process who, so that after a short time a new cast workpiece can be inserted. In addition, the brake can be activated during the starting process, so that any critical egg genfrequenzen can be overcome as quickly as possible. According to the invention, a method for coring castings by means of a decoring machine according to one of the preceding claims is also provided. The method comprises the following method steps:

- clamping the cast workpiece on the workpiece carrier;

- shaking the cast workpiece by moving the machine table together with the work piece carrier in the main direction of movement relative to the machine frame;

- Emptying the molding sand from the cast workpiece by turning the workpiece carrier about a horizontal axis of rotation relative to the machine table.

Furthermore, it can be provided that during the shaking of the cast workpiece by BEWE conditions of the machine table together with the workpiece carrier in the main movement direction relative to the machine frame is simultaneously acted upon by at least one of the Entkemhämmer on the cast workpiece. The advantage here is that by this measure the Entkemvorgang can be accelerated.

Furthermore, it may be expedient if the machine table has an upper table top and a lower table top, which are arranged at a distance from one another, wherein the eccentric mass is arranged between the two tabletops.

In addition, it may be advantageous if the two synchronization discs are arranged outside the upper or lower table top. In addition, it can be provided that the driven pulley is arranged outside the opposite table top.

Furthermore, it can be provided that the first eccentric mass is arranged on a first shaft and the second eccentric mass is arranged on a second shaft, wherein the first shaft and the second shaft respectively by means disposed in the upper table top first La ger and one in the lower Table top arranged second bearings are stored.

Furthermore, it can be provided that the eccentric drive motor is angeord net on the machine frame and is not moved relative to the machine base during operation of Entkernmaschine. Furthermore, it can be provided that the workpiece carrier has a clamping device for fastening the cast workpiece.

In addition, it can be provided that the support table is positioned in such a way that the center of gravity of the complete workpiece carrier, together with the cast workpiece, is at the level of the horizontal axis of rotation.

For a better understanding of the invention, this will be explained in more detail with reference to the following figures.

In each case, in a highly simplified, schematic representation:

1 is a perspective view of a first embodiment of a Entkernma- machine;

Fig. 2 is a perspective view of another embodiment of a decoring machine;

3 is a side view of an embodiment of a deskewing machine;

4 shows various embodiments of the rotary drive of the decapping machine;

Fig. 5 is a front view of an embodiment of the deskeeping machine;

Fig. 6 is a side view of another embodiment of a Entkernmaschine.

Introductoryly it should be noted that in the differently described embodiments, the same parts provided with the same reference numerals or the same component names who the, with the disclosures contained in the entire description mutatis mutandis to equivalent parts with the same reference numerals or the same component names who can. Also, the position information selected in the description, such as above, un th, laterally, etc. related to the immediately described and illustrated figure and these position information in a change in position mutatis mutandis to transfer to the new location. 1 shows a first embodiment of a decoring machine 1, which can also be referred to as a vibrating machine in an oblique view. The decocking machine 1 is used for removing pieces of cast workpieces 2. The decoring machine 1 comprises a machine frame 3, which can be placed on a machine base 4 or is set up. Furthermore, the Entkernmaschine 1 comprises a relative to the machine frame 3 in a main movement direction 5 movably mounted machine table 6 for clamping the cast workpiece 2. The machine table 6 is here by means of a suspension 7 movably mounted on the machine frame 3.

As can be seen from the present embodiment, it can be provided that the suspension 7 comprises a leaf spring 8, which is coupled at both longitudinal ends by means of a rotary joint 9 with the machine frame 3. The hinges 9 can in this case be arranged nenrahmen 3 on Maschi and the leaf spring 8 be supported in the pivot joint 9. The Blattfe 8 may be coupled to the machine table 6 in the region of its longitudinal center. This can be achieved for example by means of clamping jaws, or by means of a screw connection of the leaf spring 8 to the machine table 6.

In addition, the Entkemmaschine 1 comprises a first eccentric mass 10, which is rotatably mounted on the Ma schinentisch 6, wherein the first eccentric mass 10 is coupled to a first Ab drive disc 11.

In addition, the Entkernmaschine 1 in the present embodiment comprises a second eccentric mass 12 which is rotatably mounted on the machine table 6, wherein the second eccentric mass 12 is coupled to a second driven pulley 13. The second Ex cent mass 12 is driven in opposite directions to the first eccentric mass 10.

In the present embodiment, the first eccentric mass 10 and the second Exzen termasse 12 are each coupled to an eccentric drive motor 14. Here, a drive pulley 15 is arranged on the eccentric drive motor 14, which belt by means of a drive 16 with the driven pulley 11, 13 is coupled. As a drive belt 16 in this case, for example, a toothed belt can be used. In particular, it can be provided that the eccentric drive motor 14 is arranged on the machine frame 3 and thus is not moved with the machine table 6. By this measure, the life of the eccentric drive motor 14 can be increased.

Furthermore, it can be provided that a straight line 17, which extends between a rotation axis 18 of the drive pulley 15 and a rotation axis 19 of the driven pulley 11, 13, is arranged at an angle 20 to the main movement direction 5. The angle 20 is preferably 90 °.

In the present exemplary embodiment, the two eccentric masses 10, 12 can each be driven independently of one another by the respective associated eccentric drive motor 14. The two eccentric drive motors 14 can in this case be controlled in such a way that the eccentric masses 10, 12 are rotated in synchronism with one another in the opposite direction of rotation.

As can further be seen from FIG. 1, it can be provided that a workpiece carrier 21 is provided for receiving the cast workpiece 2. The workpiece carrier 21 can be rotated by means of a pivot bearing 22 about a horizontal axis of rotation 23 relative to the machine table 6. The horizontal axis of rotation 23 may in this case be arranged parallel to the main movement direction 5.

Due to the pivoting of the workpiece carrier 21, the cast workpiece 2 can be turned upside down or swiveled sideways so that the sand mold located in the cast workpiece 2 can be removed by gravity from the cast workpiece 2.

As can be seen from FIG. 1, during operation of the decoring machine 1, the machine table 6 is set in oscillation by the eccentric masses 10, 12 in the main movement direction 5.

This relative movement between the machine table 6 and the machine frame 3 can be achieved by the flexible suspension 7 of the machine table 6.

In particular, it can be provided that the machine table 6 oscillates with an amplitude between +/- 2 mm to +/- 15 mm. An amplitude of +/- 4 mm to +/- 8 mm has proved to be advantageous. Since the workpiece carrier 21 is coupled by means of the rotary bearing 22 with the machine table 6, also the workpiece carrier 21 oscillates in the same amplitude with the machine table 6. The pivot bearing 22 as a connecting component between the machine table 6 and the workpiece carrier 21 therefore naturally also resonates in the main movement direction 5.

Furthermore, a rotary drive 24 is shown schematically, which serves for rotating the workpiece carrier 21 relative to the machine table 6. The rotary drive 24 may in this case have, for example, a drive motor 25, which is coupled to the machine table 6 or arranged thereon. Thus, it can be provided that the drive motor 25 also resonates in the main movement direction 5 with the machine table 6. In such an embodiment, the rotary drive 24 may be coupled to the workpiece carrier 21, for example by means of a gear connection.

As can be seen from Fig. 1, it can be provided that the machine frame 3 has two Seitent hurry 26, on which the hinges 9 of the suspension 7 are arranged. For the sake of clarity, in FIG. 1 the side member 26 closest to the possible observer and the suspensions 7 arranged thereon are hidden. However, it is clear to the person skilled in the art that the side part 26, not shown, with the suspensions 7, not shown, is embodied in mirrored form to the components shown.

FIG. 2 shows a further embodiment of the decoring machine 1, which is possibly independent of itself, again using the same reference numerals or component designations as in the preceding FIG. 1 for identical parts. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding FIG.

As can be seen from Fig. 2, it can be provided that the leaf springs 8 of the suspension 7 are connected at its first longitudinal end directly to the machine table 6 and are connected at its two th longitudinal end directly to the machine frame 3. Also in this example Ausfüh the machine table 6 can be coupled by means of several suspensions 7 nenrahmen 3 with the Maschi. As can further be seen from this exemplary embodiment, it can be provided that both the first driven pulley 11 of the first eccentric mass 10 and the second driven pulley 13 of the second eccentric mass 12 are looped around by only one drive belt 16, which is coupled to a drive pulley 15 of the eccentric drive motor 14 , Thus, only a single eccentric drive motor 14 for driving both eccentric masses 10,

12 provided. However, such Antiebssituation to drive the eccentric masses 10, 12 is not limited to the embodiment shown, but may be provided regardless of the design of the suspensions 7.

In particular, it can be provided that the eccentric drive motor 14 is received on the machine frame 3 and thus stands still relative to the machine base 4, respectively, is supported via damping elements and thus may have a slight movement. Furthermore, a plurality of ETmlenkscheiben 27 may be provided to which the drive belt 16 of the type is performed, that an inner side 28 of the drive belt 16 on the first output disc 11 abuts and an outer side 29 of the drive belt 16 abuts the second driven pulley 13. By this measure it can be achieved that the two eccentric masses 10, 12 are driven in the opposite direction of rotation.

FIG. 3 shows a further embodiment of the decoring machine 1, which is possibly independent of itself, again using the same reference numerals or component designations for the same parts as in the preceding FIGS. 1 and 2. To avoid unnecessary repetition, reference is made to the detailed description in the preceding Figures 1 and 2 or reference.

In Fig. 3a, the Entkernmaschine 1 is shown in a side view, wherein a view ge according to the line III-III of FIG. 1 was selected. The embodiment of FIG. 3, similar to the embodiment of FIG. 1 on a machine frame 3, which also has two side parts 26. For the sake of clarity, the side member 26 closest to the observer was also hidden here. In Fig. 3b, a part of Entkernmaschine 1 is shown in the accompanying plan view for side view, in this figure, only the Antriebssi situation of the eccentric masses 10, 12 is shown. As can be seen from Fig. 3, it can be provided that the machine table 6 has an upper table plate 30 and a lower table top 31, which are coupled together by means of connecting elements 32. The machine table 6 can be executed here example, as casting construction. Alternatively, it is also conceivable that the machine table 6 is designed as a welded construction. In yet another embodiment, it is also conceivable that the machine table 6 is designed as a screw construction. In particular, it can be provided that the machine table 6 or at least a majority of its individual parts are made of aluminum.

Furthermore, clamping jaws 33 can be provided, by means of which the machine table 6 can be arranged centrally on the leaf springs 8. Furthermore, it can be provided that a first shaft 34 is formed, which extends between the upper table top 30 and the Unte ren table top 31. Similarly, it can be provided that a second shaft 35 is formed, which also plate 31 extends between the upper table top 30 and the lower table. The second shaft 35 serves to receive the second eccentric mass 12. In particular, it can be seen that the two eccentric weights 10, 12 are each arranged between the upper table top 30 and the lower table top 31 ,

Furthermore, it can be provided that at least one of the two shafts 34, 35 from a drive disk 11, 13 is arranged, which coupled to the eccentric drive motor 14 who can.

In the present embodiment, only the second shaft 35, the second driven pulley 13 is arranged, which is coupled by means of the drive belt 16 with the drive pulley 15 and thus with the eccentric drive motor 14. As can be seen from the embodiment of FIG. 3, it can be provided that the second driven disc 13 is arranged below the lower table top 31.

The driven pulley 11, 13 and the eccentric masses 10, 12 may also be arranged at another point on the shaft 34, 35. Since only one of the two shafts 34, 35 is coupled to the eccentric drive motor 14 in the present exemplary embodiment, a synchronization means 36 is provided, by means of which the first shaft 34 is coupled to the second shaft 35.

As can be seen from the present exemplary embodiment, it can be provided, for example, that the synchronization means 36 has a first synchronization disk 37, which is arranged on the first shaft 34 and has a second synchronization disk 38, which is arranged on the second shaft 35. Furthermore, a synchronization belt 39 can be provided, which is wound around the first synchronization disk 37 about the second synchronization disk 38 and serves to synchronize the two shafts 34, 35 and thus the two eccentric masses 10, 12.

In order to achieve an opposite direction of rotation of the two eccentric masses 10, 12, it can be provided that the synchronization belt 39 is additionally guided around ETccentric disks 40 so that an inner side 41 of the synchronization belt 39 rests against the second synchronizing disk 38 and an outer side 42 of the timing belt 39 is applied to the Ers th synchronization disc 37. Of course, the ETmlenkscheiben 40 may also be arranged in the region of the second synchronization disc 38, so that the Synchronisati onsriemen 39 abuts on the inside 41 of the first synchronization disc 37 and rests against the outside 42 of the second synchronization disc 38. The arrangement of the synchronization means 36 is shown schematically in Fig. 3 in addition to the side view in a plan view.

In an embodiment not shown can also be provided that on the ers th shaft 34 and the second shaft 35, a gear is arranged in each case, wherein the gears are engaged with each other and thereby achieved an opposite direction of rotation of the two shafts 34, 35 becomes.

In Fig. 3, a further embodiment of the connection of the workpiece carrier 21 is shown on the machine table 6. As can be seen from FIG. 3, it can be provided that the rotary bearing 22 is designed in the form of a turntable which is interposed between the machine table 6 and the workpiece carrier 21, or by means of which the workpiece carrier 21 is received on the machine table 6. Furthermore, it can be provided that the rotary drive 24 for rotating the workpiece carrier 21 has a rotary drive disk 43, which is arranged on the drive motor 25 and which is turned over by a traction mechanism 44. The traction means 44 can be designed, for example, in the form of a toothed belt, which serves for torque transmission between the rotary drive disc 43 and a workpiece carrier disc 45.

As can be seen from FIG. 3, it can be provided that the drive motor 25 of the rotary drive 24 is coupled to the machine frame 3 or is fastened directly thereto, and thus the drive motor 25 also stands still relative to the machine base 4. The resulting axial relative movement between the rotary drive disk 43 and the workpiece carrier disk 45 can be compensated for by means of the traction mechanism 44.

FIG. 4 shows a further embodiment of the decoring machine 1, which is possibly independent of itself, again using the same reference numerals or component designations for the same parts as in the preceding FIGS. 1 to 3. To avoid unnecessary repetition, reference is made to the detailed description in the preceding figures 1 to 3 or reference.

In the figures 4a to 4d various embodiments of the rotary drive 24 in egg ner side view along the section line IV - IV of Fig. 3 are shown. These are schematic simplistic representations excluding the rotary drive 24th

In Fig. 4a that drive situation is shown, as it is also present in Fig. 3. As can be seen from Fig. 4a, it can be provided that the traction means 44 forms out as an endless belt, which is wrapped around both the rotary drive pulley 43 and the workpiece carrier disc 45.

FIG. 4 b shows a further exemplary embodiment of the rotary drive 24, with the traction mechanism 44 additionally being provided around the side opposite the rotary drive disk 43 Counter-support roller 46 is looped. By means of the counter-holding roller 46 can be achieved that the traction means 44 is not a pulling force on the workpiece carrier disc 45 is exercised.

In the exemplary embodiments according to FIGS. 4 a and 4 b, the workpiece carrier disk 45 preferably has an external toothing, which cooperates with a traction mechanism 44 designed as a toothed belt.

In Fig. 4c, another embodiment of the rotary drive 24 is shown. As can be seen from FIG. 4c, it can be provided that the traction means 44 is not designed as endlessly circulating traction means as in FIGS. 4a and 4b but has a first longitudinal end 47 and a second longitudinal end 48. The first longitudinal end 47 and the second longitudinal end 48 may in this case each be fixed by a clamping jaw 49 on the workpiece carrier disc 45. The mode of operation of the rotary drive 24 here is the same as in that rotary drive 24, which is shown in Fig. 4a. The workpiece carrier disc 45 need not have any external teeth in the exemplary embodiment according to FIG. 4 c. This is made possible by the United bond by means of the jaws 49.

FIG. 4d shows a further exemplary embodiment of the rotary drive 24, which is already shown in FIG. As can be seen from Fig. 4d, it can be provided that the rotary drive pulley 43 is formed, for example, as a gear which is directly in engagement with the workpiece carrier plate 45, which also has an external toothing in this embodiment. In this case, different types of teeth, such as an involute or a drive gearing can be provided.

Alternatively, the teeth may also be formed on the inside of the workpiece carrier disc 45, wherein the workpiece carrier disc 45 may be formed in accordance with a ring gear. In such a configuration of the workpiece carrier disk 45, the Drehan drive disk 43 may be disposed on the inside of the workpiece carrier disk 45.

As can be seen from FIG. 3, it can be provided that the workpiece carrier 21 has a support table 51, on which the cast workpiece 2 can be received. The support table 51 is preferably positioned such that the center of gravity of the complete workpiece carrier 21 together with the cast workpiece 2 is at the level of the horizontal axis of rotation 23. As a result of this measure, the torque to be applied by the drive motor 25 can be kept as low as possible. In addition, by this measure verhin changed that a tilting moment is introduced into the machine table 6 by the oscillatory movement of the workpiece carrier 21 in the main movement direction 5.

3, it can be provided that the decocking machine 1 has a decoring hammer 50, which is likewise arranged on the workpiece carrier 21 and thus together with the workpiece carrier 21 relative to the machine table 6 with respect to the hori zontal axis of rotation 23 is rotatable. The Entkemhammer 50 has a punch 52, which is brought into contact with the casting workpiece 2 and striking the cast piece 2 acts. By means of the Entkemhammer 50, the Entkernwirkung the Entkernma machine 1 can be improved. The punch 52 of the Entkemhammers 50 can simultaneously serve to clamp the cast workpiece 2 on the support table 51.

As can further be seen from FIG. 3, it can be provided that a brake 56 is formed, by means of which the oscillating movement of the machine table 6 relative to the machine frame 3 can be braked. By the brake 56, the Entkemmaschine 1 can be brought to a standstill in a short time, so that after the completion of the Entkemvorganges a new cast workpiece 2 can be inserted into the Entkemmaschine 1.

As can be seen in FIG. 3, the brake 56 may comprise two brake shoes 58 which can be brought into engagement with a brake plate 57 and thus prevent a relative movement between the brake shoes 58 and the brake plate 57. The brake plate 57 may in this case be arranged on the machine frame 6 and thus resonate with it. The brake shoes 58 can be arranged on the machine frame 3 and thus stand still.

Of course, in an alternative embodiment, the brake shoes 58 may also be arranged on the machine frame 6 and the brake plate 57 may be arranged on the machine frame 3. FIG. 5 shows a further embodiment of the decoring machine 1, which is possibly independent of itself, wherein the same reference numerals or component designations are used again for the same parts as in the preceding FIGS. 1 to 4. To avoid unnecessary repetition, reference is made to the detailed description in the preceding figures 1 to 4 or reference.

FIG. 5 shows a schematic front view of the decoring machine 1 according to the line V-V from FIG. 3. FIG. 5 shows a possible embodiment of the decoring hammer 50.

As can be seen from FIG. 5, provision can be made for the support table 51, on which the cast work piece or pieces 2 rest, to be arranged on a base frame 54 in a tiltable manner by means of a self-aligning bearing 53. This is particularly advantageous when two decorating hammers 50 are formed. By this measure, two cast workpieces 2 can be attached to the on-table 51, wherein due to the self-aligning bearing 53, the bridge on the Gusswerkstü 2 acting clamping force is equal.

Furthermore, it can be provided that a feed cylinder 55 is formed by means of which the support table 51 can be displaced relative to the coring hammers 50. By this measure, different high cast workpieces 2 can be clamped in the workpiece carrier 21.

FIG. 6 shows a further embodiment of the decoring machine 1, which is possibly independent of itself, wherein the same reference numerals or component designations are used again for the same parts as in the preceding FIGS. 1 to 5. In order to avoid unnecessary repetition, reference is made to the detailed description in the preceding Figures 1 to 5 or reference.

Fig. 6 shows another embodiment of the workpiece carrier 21 similar to the view in Fig. 3, but only the workpiece carrier 21 and the components connected thereto th are shown. As can be seen from FIG. 6, it can be provided that the support table 51 is L-shaped or has a counter-holder plate and that the decoupling hammer 50 acts in a horizontal direction parallel to the horizontal axis of rotation 23. In a derarti gene embodiment, the cast workpiece 2 can be easily inserted into the support table 51, since the Entkemhammer 50 when inserting the cast workpiece 2 is not in the way. As a result, the support table 51 is easily accessible from above, as a result of which the cast workpiece 2 can be inserted into the support table 51, for example by means of a crane or by means of a manipulation robot.

The Entkemhammer 50 may be coupled by means of a Haltemng 59 with the support table 51.

In particular, it may be provided that the pivot bearing 22 or the receptacle of the rotary bearing 22 is formed in such a hollow-cylindrical manner that the deshirring hammer 50 can project through the rotary bearing 22. Thus, the Entkernmaschine 1 can be built as compact and space-saving. In addition, it is possible by the hollow cylindrical design of the pivot bearing 22 that various Medienlei lines are guided by the centrally located cavity.

The embodiments show possible embodiments, it being noted at this point be that the invention is not limited to the specifically illustrated embodiments dersel ben, but also various combinations of the individual Ausfüh insurance variants are mutually possible and this variation possibility due to the teaching of technical action representational invention in the skill of those skilled in this technical field.

The scope of protection is determined by the claims. However, the description and drawings are to be considered to interpret the claims. Individual features or feature combinations from the illustrated and described different Ausführungsbeispie len can represent for themselves inventive solutions. The independent inventive solutions underlying task can the description taken from who the.

All information on ranges of values in representational description should be understood to include any and all subsections thereof, eg the indication 1 to 10 is to be understood as meaning that all partial regions are included, starting from the lower limit 1 and the upper limit 10, ie all partial regions starting with a lower limit of 1 or greater and ending at an upper limit of 10 or less, eg 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.

For the sake of order, it should finally be pointed out that, for a better understanding of the structure, elements have been shown partly out of scale and / or enlarged and / or reduced in size.

E n g u n c e m e n t i o n d Entoring machine 31 bottom plate

Cast workpiece 32 connecting element

Machine frame 33 jaw

Machine base 34 first shaft

Main movement direction 35 second shaft

Machine table 36 synchronization means

Suspension 37 First synchronization disc Leaf spring 38 Second synchronization disc Rotary joint 39 Synchronization belt First eccentric mass 40 ETMLenkscheibe

first driven pulley 41 inside timing belt second eccentric mass 42 outside synchronization pulley second driven pulley men

Eccentric drive motor 43 Rotary drive pulley

Antri ng disc 44 Traction devices

Drive belt 45 workpiece carrier disc

Just 46 counterweight

Rotation axis drive pulley 47 first longitudinal end

Rotary axis driven pulley 48 second longitudinal end

Angle 49 jaws

Tool carrier 50 Entkemhammer

Drehlagerung 51 support table

horizontal axis of rotation 52 stamp

Rotary drive 53 self-aligning bearing

Drive motor 54 base frame

Side section 55 infeed cylinder

Discs washer 56 Brake

Inside drive belt 57 brake plate

Outside drive belt 58 brake shoes

upper table top 59 bracket

Claims

Patent claims

A coring machine (1) for coring castings (2), comprising:

- A machine frame (3) which can be set up on a machine base (4);

- A machine table (6) which is coupled by means of a suspension (7) with the machine frame (3), wherein the machine table (6) by means of the suspension (7) at least in a main movement direction (5) relative to the machine frame (3) is movably mounted ;

- A first eccentric mass (10) which is rotatably mounted on the machine table (6);

- A second eccentric mass (12) which is rotatably mounted on the machine table (6), wherein the second eccentric mass (12) to the first eccentric mass (10) is driven in opposite directions;

- A workpiece carrier (21) for receiving the cast workpiece to be cored (2), characterized in that

the workpiece carrier (21) is coupled to the machine table (6) by means of a rotary bearing (22), wherein the rotary bearing (22) is designed such that the workpiece carrier (21) is rotatable about a horizontal axis of rotation (23) relative to the machine table (6 ) is rotatably mounted.

2. Entkernmaschine according to claim 1, characterized in that the Aufhän movement (7) comprises a leaf spring (8), wherein the leaf spring (8) at its two longitudinal ends by means of a rotary joint (9) with the machine frame (3) and in the region Longitudinal center is coupled to the machine table (6).

3. Entkernmaschine according to claim 1 or 2, characterized in that the pivot bearing (22) is designed in the form of a turntable.

4. Entkernmaschine according to any one of the preceding claims, characterized in that a rotary drive (24) is formed, by means of which the workpiece carrier (21) relative to the machine table (6) is rotatable.

5. Entkernmaschine according to claim 4, characterized in that the rotary drive (24) comprises a drive motor (25) with a rotary drive pulley (43) and a drive pulley to the Drehan (43) looped traction means (44), wherein the drive motor (25) on Machine frame (3) is received, wherein the traction means (44) is coupled to the workpiece carrier (21).

6. Entkernmaschine according to claim 5, characterized in that the traction means (44) has a first longitudinal end (47) and a second longitudinal end (48), wherein the first longitudinal end (47) and the second longitudinal end (48) in each case with the workpiece carrier ( 21) are verbun the and wherein the rotary drive disc (43) between the first longitudinal end (47) and the second longitudinal end (48) is arranged.

7. Entkernmaschine according to any one of the preceding claims, characterized in that at least one of the eccentric masses (10) with an eccentric drive motor (14) is coupled, wherein the eccentric drive motor (14) on the machine frame (3) is arranged.

8. Entkernmaschine according to claim 7, characterized in that the Exzenteran drive motor (14) a drive pulley (15) is arranged and on the eccentric mass (10) a driven pulley (11) is arranged, wherein a drive belt to the drive pulley (15) and the Abtriebs disc (11) is looped, wherein between the rotation axis (18) of the drive disc (15) and the rotation axis (19) of the driven pulley (11) drawn Ge rade (17) at an angle (20) between 85 ° and 95 ° to the main direction of movement (5) of the machine table (6).

9. Entkernmaschine according to any one of the preceding claims, characterized in that the two eccentric masses (10, 12) by means of a synchronization means (36) are rotatably connected to each other.

10. Entkernmaschine according to claim 9, characterized in that the first Exzen termasse (10) with a first synchronization disc (37) is coupled and the second Ex centre mass (12) with a second synchronization disc (38) is coupled, wherein the synchronization means (36 ) comprises a synchronization belt (39) which is deflected around ETmlenkscheiben (40) such that an inner side (41) of the timing belt (39) with the first synchronization disc (37) is in operative connection and an outer side (42) of the timing belt (39 ) is in operative connection with the second synchronization disc (38).

11. Entkernmaschine according to any one of the preceding claims, characterized in that on the workpiece carrier (21) at least one Entkemhammer (50), in particular a hydraulically acting Entkernhammer (50) is arranged, which has a hammer head, which acts on a Workpiece is formed.

12. Entkernmaschine according to claim 11, characterized in that the decoring hammer (50) is arranged on the workpiece carrier (21) such that a direction of action of the Entkemhammers (50) parallel to the main movement direction (5).

13. Entkernmaschine according to claim 11 or 12, characterized in that the Entkernhammer (50) transversely to the main movement direction (5) relative to the workpiece carrier (21) is displaceable.

14. Entkernmaschine according to one of claims 11 to 13, characterized in that the Entkernhammer (50) in the main direction of movement (5) relative to the workpiece carrier (21) is displaceable.

15. Entkernmaschine according to one of claims 11 to 14, characterized in that two Entkernhämmer (50) on the workpiece carrier (21) are arranged, wherein the work piece carrier (21) has a support table (51) which by means of a self-aligning bearing (53) a base frame (54) of the workpiece carrier (21) is mounted.

16. Entkernmaschine according to any one of the preceding claims, characterized in that a brake (56) is formed, by means of which the machine table (6) relative to the machine frame (3) can be braked.

17. A method for producing cast workpieces (2) by means of a Entkemma- machine (1) according to one of the preceding claims, characterized in that the method comprises the following method steps:

- clamping the cast workpiece (2) on the workpiece carrier (21);

- shaking the cast workpiece (2) by moving the machine table (6) together with the workpiece carrier (21) in the main direction of movement (5) relative to the machine frame (3); - Emptying the molding sand from the cast workpiece (2) by rotating the workpiece carrier (21) about a horizontal axis of rotation (23) relative to the machine table (6).

18. The method according to claim 17, characterized in that during the shaking of the cast workpiece (2) by moving the machine table (6) together with the workpiece carrier (21) in the main movement direction (5) relative to the machine frame (3) at the same time by means of at least one of the coring hammers (50) on the cast workpiece (2) is acted.